:root{--font-sans: "Inter", "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;--font-display: "Inter Display", "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, sans-serif;--font-mono: "Cascadia Code", "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;--text-xs: .75rem;--text-sm: .875rem;--text-md: 1rem;--text-lg: 1.125rem;--text-xl: 1.375rem;--text-2xl: 1.75rem;--text-3xl: clamp(2rem, 4.5vw, 3rem);--text-hero: clamp(2.5rem, 7vw, 4.75rem);--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 24px;--space-6: 32px;--space-7: 48px;--space-8: 64px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 20px;--radius-xl: 28px;--radius-pill: 999px;--content-width: 760px;--wide-width: 1120px;--rail-width: 232px;--tabbar-height: 64px;--ease: cubic-bezier(.2, .8, .2, 1);--fast: .12s;--normal: .22s;--slow: .42s;--brand: #1da271;--spark: #ffb547}:root,:root[data-theme=dark]{color-scheme:dark;--bg: #0b0d12;--bg-elevated: #12151c;--surface: #171b24;--surface-2: #1f2430;--surface-3: #2a3040;--line: #2b3242;--line-strong: #3b4458;--text: #f2f5fa;--text-2: #b4bdcc;--text-3: #7e889a;--accent: #2ee6a6;--accent-strong: #5ff2bf;--accent-soft: rgba(46, 230, 166, .14);--on-accent: #04130d;--success: #3ddc84;--success-soft: rgba(61, 220, 132, .14);--warning: #ffb547;--warning-soft: rgba(255, 181, 71, .14);--danger: #ff6b6b;--danger-soft: rgba(255, 107, 107, .14);--info: #6ea8ff;--info-soft: rgba(110, 168, 255, .14);--scrim: rgba(5, 7, 10, .72);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);--shadow-md: 0 8px 24px rgba(0, 0, 0, .35);--shadow-lg: 0 24px 64px rgba(0, 0, 0, .5);--focus: 0 0 0 3px rgba(46, 230, 166, .45);--paper: #eef1f5;--paper-ink: #1d2733;--logo-ink: #1da271;--hero-glow: radial-gradient(60% 50% at 70% 10%, rgba(46, 230, 166, .18), transparent 70%), radial-gradient(50% 40% at 10% 90%, rgba(110, 168, 255, .14), transparent 70%)}:root[data-theme=light]{color-scheme:light;--bg: #f6f7f9;--bg-elevated: #ffffff;--surface: #ffffff;--surface-2: #f0f2f5;--surface-3: #e4e8ee;--line: #e2e6ec;--line-strong: #c9d0da;--text: #0f141b;--text-2: #3f4a5a;--text-3: #6b7686;--accent: #1da271;--accent-strong: #138257;--accent-soft: rgba(29, 162, 113, .11);--on-accent: #ffffff;--success: #12924f;--success-soft: rgba(18, 146, 79, .1);--warning: #b86e00;--warning-soft: rgba(184, 110, 0, .1);--danger: #d63b3b;--danger-soft: rgba(214, 59, 59, .09);--info: #2f6fd6;--info-soft: rgba(47, 111, 214, .09);--scrim: rgba(15, 20, 27, .45);--shadow-sm: 0 1px 2px rgba(15, 20, 27, .06);--shadow-md: 0 8px 24px rgba(15, 20, 27, .08);--shadow-lg: 0 24px 64px rgba(15, 20, 27, .16);--focus: 0 0 0 3px rgba(29, 162, 113, .35);--paper: #ffffff;--paper-ink: #1d2733;--logo-ink: #0f141b;--hero-glow: radial-gradient(60% 50% at 70% 10%, rgba(10, 159, 108, .12), transparent 70%), radial-gradient(50% 40% at 10% 90%, rgba(47, 111, 214, .1), transparent 70%)}@media(prefers-reduced-motion:reduce){:root{--fast: 0ms;--normal: 0ms;--slow: 0ms}}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}html,body{margin:0;min-height:100%;background:var(--bg);color:var(--text)}body{font-family:var(--font-sans);font-size:var(--text-md);line-height:1.55;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--normal) var(--ease),color var(--normal) var(--ease)}#root{min-height:100vh;min-height:100dvh}body:before{content:"";position:fixed;inset:0 0 auto;z-index:2147483000;height:env(safe-area-inset-top);background:#0b0d12;pointer-events:none}@media(display-mode:standalone){html,body{overscroll-behavior-y:none}button,.btn,.tab,.rail-item,img,svg{-webkit-touch-callout:none}}@media(pointer:coarse){input:not([type=range]):not([type=checkbox]):not([type=radio]),select,textarea{font-size:max(16px,1em)}}h1,h2,h3,h4{font-family:var(--font-display);line-height:1.2;letter-spacing:-.015em;margin:0 0 var(--space-3);color:var(--text)}h1{font-size:var(--text-3xl);font-weight:750}h2{font-size:var(--text-xl);font-weight:700}h3{font-size:var(--text-lg);font-weight:650}p{margin:0 0 var(--space-3)}a{color:var(--accent);text-decoration:none;text-underline-offset:3px}a:hover{text-decoration:underline}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}img,svg,video,canvas{max-width:100%}:focus-visible{outline:none;box-shadow:var(--focus);border-radius:var(--radius-sm)}::selection{background:var(--accent-soft)}small{font-size:var(--text-sm);color:var(--text-3)}hr{border:0;border-top:1px solid var(--line);margin:var(--space-5) 0}code,pre,kbd{font-family:var(--font-mono);font-size:.92em}pre{white-space:pre-wrap;overflow-x:auto;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-md);padding:var(--space-3) var(--space-4)}details>summary{display:flex;align-items:center;gap:10px;min-height:32px;padding:2px 0;cursor:pointer;color:var(--text-2);font-weight:600;list-style:none;-webkit-tap-highlight-color:transparent}details>summary::-webkit-details-marker{display:none}details>summary:before{content:"";flex:none;width:7px;height:7px;margin:0 3px 0 4px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(-45deg);opacity:.75;transition:transform var(--fast) var(--ease)}details[open]>summary:before{transform:rotate(45deg) translate(-1px,-1px)}details>summary:hover{color:var(--text)}details[open]>summary{margin-bottom:var(--space-2)}ul,ol{padding-left:1.25rem;margin:0 0 var(--space-3)}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:var(--space-2) var(--space-3);border-bottom:1px solid var(--line)}.visually-hidden{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.katex{font-size:1.05em;color:inherit}.katex-display{overflow-x:auto;overflow-y:hidden;padding:var(--space-1) 0}input[type=file]{font-size:var(--text-sm);color:var(--text-2);max-width:100%}input[type=file]::file-selector-button{margin-right:var(--space-3);padding:8px 16px;border-radius:var(--radius-pill);border:1px solid var(--line-strong);background:var(--surface-2);color:var(--text);font:inherit;font-weight:650;cursor:pointer}input[type=checkbox],input[type=radio],input[type=range]{accent-color:var(--accent)}.page{width:100%;max-width:var(--content-width);margin:0 auto;padding:max(var(--space-5),calc(env(safe-area-inset-top) + var(--space-3))) max(var(--space-4),env(safe-area-inset-right)) calc(var(--tabbar-height) + env(safe-area-inset-bottom) + var(--space-7)) max(var(--space-4),env(safe-area-inset-left))}.page-wide{max-width:var(--wide-width)}@media(min-width:900px){.page{padding:var(--space-7) var(--space-6) var(--space-8)}}.page-header{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--space-4);margin-bottom:var(--space-5);flex-wrap:wrap}.page-header h1{margin:0;font-size:clamp(1.4rem,5vw,var(--text-2xl))}.page-header p{margin:var(--space-1) 0 0;color:var(--text-2)}.stack{display:flex;flex-direction:column;gap:var(--space-4)}.stack-sm{gap:var(--space-2)}.stack-lg{gap:var(--space-6)}.row{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap}.row-between{justify-content:space-between}.grid{display:grid;gap:var(--space-4);grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr))}.section-title{font-size:var(--text-xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text-3);margin:var(--space-5) 0 var(--space-3)}.eyebrow{font-size:var(--text-xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin:0 0 var(--space-2)}.muted{color:var(--text-2)}.subtle{color:var(--text-3);font-size:var(--text-sm)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);min-height:44px;padding:0 var(--space-5);border-radius:var(--radius-pill);border:1px solid var(--line-strong);background:var(--surface);color:var(--text);font-weight:650;font-size:var(--text-md);line-height:1;text-decoration:none;white-space:nowrap;transition:transform var(--fast) var(--ease),background-color var(--fast) var(--ease),border-color var(--fast) var(--ease),opacity var(--fast) var(--ease);-webkit-tap-highlight-color:transparent}.btn:hover{text-decoration:none;border-color:var(--text-3)}.btn:active:not(:disabled){transform:scale(.97)}.btn:disabled{opacity:.45}.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}.btn-primary:hover{background:var(--accent-strong);border-color:var(--accent-strong)}.btn-ghost{background:transparent;border-color:transparent;color:var(--text-2)}.btn-ghost:hover{background:var(--surface-2);border-color:transparent;color:var(--text)}.btn-danger{background:transparent;border-color:var(--danger);color:var(--danger)}.btn-sm{min-height:34px;padding:0 var(--space-4);font-size:var(--text-sm)}.btn-lg{min-height:54px;padding:0 var(--space-6);font-size:var(--text-lg)}.btn-block{width:100%}.icon-btn{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:var(--radius-pill);border:0;background:transparent;color:var(--text-2);transition:background-color var(--fast) var(--ease),color var(--fast) var(--ease)}.icon-btn:hover{background:var(--surface-2);color:var(--text)}.link-btn{border:0;background:none;padding:0;color:var(--accent);font-weight:600}.link-btn:hover{text-decoration:underline}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:var(--space-5);box-shadow:var(--shadow-sm)}.card-tight{padding:var(--space-4)}.card h2,.card h3{margin-bottom:var(--space-2)}.card-interactive{cursor:pointer;text-align:left;width:100%;color:inherit;transition:border-color var(--fast) var(--ease),transform var(--fast) var(--ease)}.card-interactive:hover{border-color:var(--line-strong)}.card-interactive:active{transform:scale(.99)}.hero-card{position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-xl);padding:var(--space-6)}.hero-card:before{content:"";position:absolute;inset:0;background:var(--hero-glow);pointer-events:none}.hero-card>*{position:relative}.chip{display:inline-flex;align-items:center;gap:var(--space-1);padding:4px 10px;border-radius:var(--radius-pill);background:var(--surface-2);color:var(--text-2);font-size:var(--text-xs);font-weight:650;line-height:1.4;white-space:nowrap}.chip-accent{background:var(--accent-soft);color:var(--accent)}.chip-success{background:var(--success-soft);color:var(--success)}.chip-warning{background:var(--warning-soft);color:var(--warning)}.chip-danger{background:var(--danger-soft);color:var(--danger)}.chip-info{background:var(--info-soft);color:var(--info)}.spark-count{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:var(--radius-pill);background:#ffb54724;color:var(--spark);font-weight:750;font-variant-numeric:tabular-nums;border:0}.field{display:flex;flex-direction:column;gap:6px;font-size:var(--text-sm);font-weight:600;color:var(--text-2)}.field small{font-weight:400}.input,.field input:not([type=checkbox]):not([type=radio]):not([type=range]):not([type=file]),.field select,.field textarea{width:100%;min-height:46px;padding:10px 14px;border-radius:var(--radius-md);border:1px solid var(--line-strong);background:var(--bg-elevated);color:var(--text);font-size:var(--text-md);font-weight:400;transition:border-color var(--fast) var(--ease),box-shadow var(--fast) var(--ease)}.field textarea{min-height:120px;resize:vertical;line-height:1.5}.input:focus,.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:var(--focus)}.check{display:flex;gap:var(--space-3);align-items:flex-start;font-size:var(--text-sm);color:var(--text-2)}.check input{margin-top:3px;accent-color:var(--accent);width:18px;height:18px}.segmented{display:inline-flex;padding:4px;gap:4px;border-radius:var(--radius-pill);background:var(--surface-2);border:1px solid var(--line)}.segmented button{border:0;background:transparent;color:var(--text-2);padding:8px 16px;border-radius:var(--radius-pill);font-weight:650;font-size:var(--text-sm)}.segmented button[aria-pressed=true]{background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm)}.options{display:flex;flex-direction:column;gap:var(--space-2)}.option{display:flex;align-items:flex-start;gap:var(--space-3);width:100%;text-align:left;padding:14px 16px;border-radius:var(--radius-md);border:1.5px solid var(--line-strong);background:var(--surface);color:var(--text);font-size:var(--text-md);line-height:1.45;transition:border-color var(--fast) var(--ease),background-color var(--fast) var(--ease),transform var(--fast) var(--ease)}.option:hover:not(:disabled){border-color:var(--text-3)}.option:active:not(:disabled){transform:scale(.99)}.option[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft)}.option:disabled{cursor:default}.option-key{flex:none;display:inline-grid;place-items:center;width:26px;height:26px;border-radius:8px;background:var(--surface-2);color:var(--text-2);font-size:var(--text-sm);font-weight:750}.option[aria-pressed=true] .option-key{background:var(--accent);color:var(--on-accent)}.option.is-correct{border-color:var(--success);background:var(--success-soft)}.option.is-wrong{border-color:var(--danger);background:var(--danger-soft)}.option.is-wrong .option-key{background:var(--danger-soft);color:var(--danger)}.notice{display:flex;gap:var(--space-3);align-items:flex-start;justify-content:space-between;flex-wrap:wrap;padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);background:var(--surface-2);border:1px solid var(--line);color:var(--text-2);font-size:var(--text-sm)}.notice p:last-child{margin:0}.notice-danger{background:var(--danger-soft);border-color:transparent;color:var(--text)}.notice-success{background:var(--success-soft);border-color:transparent;color:var(--text)}.notice-warning{background:var(--warning-soft);border-color:transparent;color:var(--text)}.notice-info{background:var(--info-soft);border-color:transparent;color:var(--text)}.result{border-radius:var(--radius-lg);padding:var(--space-4) var(--space-5);border:1px solid transparent;animation:rise var(--normal) var(--ease)}.result>strong:first-child{display:block;font-size:var(--text-lg);margin-bottom:var(--space-2)}.result-correct{background:var(--success-soft);border-color:color-mix(in srgb,var(--success) 35%,transparent)}.result-wrong{background:var(--danger-soft);border-color:color-mix(in srgb,var(--danger) 30%,transparent)}.result-neutral{background:var(--surface-2);border-color:var(--line)}.progress{height:8px;border-radius:var(--radius-pill);background:var(--surface-3);overflow:hidden}.progress>span{display:block;height:100%;border-radius:inherit;background:var(--accent);transition:width var(--slow) var(--ease)}.ring{--value: 0;--size: 72px;width:var(--size);height:var(--size);border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--accent) calc(var(--value) * 1%),var(--surface-3) 0);font-weight:750;font-variant-numeric:tabular-nums}.ring>span{display:grid;place-items:center;width:calc(var(--size) - 14px);height:calc(var(--size) - 14px);border-radius:50%;background:var(--surface);font-size:var(--text-sm)}.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:var(--space-3)}.stat{padding:var(--space-4);border-radius:var(--radius-md);background:var(--surface);border:1px solid var(--line)}.stat strong{display:block;font-size:var(--text-2xl);font-weight:750;line-height:1.1;font-variant-numeric:tabular-nums}.stat span{font-size:var(--text-sm);color:var(--text-3)}.list{list-style:none;padding:0;margin:0;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);overflow:hidden}.list>li+li{border-top:1px solid var(--line)}.list-item{display:flex;align-items:center;gap:var(--space-3);width:100%;padding:var(--space-4);background:transparent;border:0;text-align:left;color:var(--text)}button.list-item:hover,a.list-item:hover{background:var(--surface-2);text-decoration:none}.list-item .grow{flex:1;min-width:0}.list-item strong{display:block;font-weight:650}.list-item small{display:block}.empty{text-align:center;padding:var(--space-7) var(--space-5);color:var(--text-2)}.empty .empty-icon{display:inline-grid;place-items:center;width:56px;height:56px;border-radius:18px;background:var(--accent-soft);color:var(--accent);margin-bottom:var(--space-4)}.empty h2{font-size:var(--text-xl)}.empty p{max-width:44ch;margin:0 auto var(--space-4)}.spinner{width:28px;height:28px;border-radius:50%;border:3px solid var(--surface-3);border-top-color:var(--accent);animation:spin .8s linear infinite}.loading-screen{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-3);color:var(--text-3)}.skeleton{border-radius:var(--radius-md);background:linear-gradient(90deg,var(--surface-2),var(--surface-3),var(--surface-2));background-size:200% 100%;animation:shimmer 1.2s ease-in-out infinite}.sheet{border:0;padding:0;margin:auto auto 0;width:100%;max-width:560px;max-height:88dvh;border-radius:var(--radius-xl) var(--radius-xl) 0 0;background:var(--bg-elevated);color:var(--text);box-shadow:var(--shadow-lg);overflow:hidden}.sheet[open]{display:flex;flex-direction:column;animation:sheet-up var(--normal) var(--ease)}.sheet::backdrop{background:var(--scrim);backdrop-filter:blur(4px)}.sheet-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding:var(--space-4) var(--space-5) var(--space-2);flex:none}.sheet-header h2{margin:0;font-size:var(--text-lg)}.sheet-body{min-height:0;padding:var(--space-2) var(--space-5) max(var(--space-6),env(safe-area-inset-bottom));overflow-y:auto;overscroll-behavior:contain}.sheet-header .icon-btn{min-width:44px;min-height:44px;flex:none}@media(max-width:600px){.sheet-body input,.sheet-body select,.sheet-body textarea{font-size:16px}}@media(min-width:700px){.sheet{margin:auto;border-radius:var(--radius-xl)}}.toast-region{position:fixed;left:50%;bottom:calc(var(--tabbar-height) + 16px + env(safe-area-inset-bottom));transform:translate(-50%);z-index:60;display:flex;flex-direction:column;gap:var(--space-2);width:min(92vw,420px);pointer-events:none}.toast{pointer-events:auto;padding:12px 16px;border-radius:var(--radius-md);background:var(--text);color:var(--bg);font-size:var(--text-sm);font-weight:600;box-shadow:var(--shadow-lg);animation:rise var(--normal) var(--ease)}.toast-danger{background:var(--danger);color:#fff}@media(min-width:900px){.toast-region{bottom:24px}}.tabs{display:flex;gap:var(--space-1);border-bottom:1px solid var(--line);margin-bottom:var(--space-5);overflow-x:auto;scrollbar-width:none}.tabs button{border:0;background:none;padding:10px 14px;color:var(--text-3);font-weight:650;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}.tabs button[aria-selected=true]{color:var(--text);border-bottom-color:var(--accent)}@keyframes spin{to{transform:rotate(360deg)}}@keyframes rise{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes sheet-up{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}@keyframes pop{0%{transform:scale(1)}40%{transform:scale(1.18)}to{transform:scale(1)}}.skeleton-stack{display:flex;flex-direction:column;gap:var(--space-3)}:root{--p-bg: var(--bg);--p-paper: var(--surface);--p-soft: var(--surface-2);--p-line: var(--line);--p-border: var(--line-strong);--p-ink: var(--text);--p-muted: var(--text-2);--p-accent: var(--accent);--p-accent-dark: var(--accent-strong);--p-on-accent: var(--on-accent);--p-green: var(--success);--p-gold: var(--warning);--p-gold-ink: var(--warning);--p-attention: var(--danger);--p-surface-light: var(--surface-2);--p-raised-edge: var(--line)}.p-primary,.p-secondary{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);min-height:42px;padding:0 var(--space-5);border-radius:var(--radius-pill);font-weight:650;border:1px solid var(--line-strong);background:var(--surface);color:var(--text);transition:background-color var(--fast) var(--ease),border-color var(--fast) var(--ease),transform var(--fast) var(--ease)}.p-primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}.p-primary:hover:not(:disabled){background:var(--accent-strong)}.p-secondary:hover:not(:disabled){border-color:var(--text-3)}.p-primary:active:not(:disabled),.p-secondary:active:not(:disabled){transform:scale(.97)}.p-primary:disabled,.p-secondary:disabled{opacity:.45}.p-link{border:0;background:none;padding:0;color:var(--accent);font-weight:600;text-align:left}.p-link:disabled{color:var(--text-3)}.p-muted{color:var(--text-2);font-size:var(--text-sm)}.p-kicker{font-size:var(--text-xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin:0 0 var(--space-2)}.p-actions,.p-course-actions{display:flex;flex-wrap:wrap;gap:var(--space-2);align-items:center;margin:var(--space-3) 0}.p-panel,.p-pack-card,.p-course-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:var(--space-5);margin-bottom:var(--space-4)}.p-panel>h2:first-child,.p-pack-card>h2:first-child{font-size:var(--text-lg)}.p-form,.p-course-fields{display:flex;flex-direction:column;gap:var(--space-3)}.p-field{display:flex;flex-direction:column;gap:6px;font-size:var(--text-sm);font-weight:600;color:var(--text-2)}.p-field input:not([type=checkbox]):not([type=radio]):not([type=range]):not([type=file]),.p-field select,.p-field textarea,.p-form input:not([type=checkbox]):not([type=radio]):not([type=range]):not([type=file]),.p-form select,.p-form textarea{width:100%;min-height:44px;padding:10px 14px;border-radius:var(--radius-md);border:1px solid var(--line-strong);background:var(--bg-elevated);color:var(--text);font-weight:400}.p-field textarea,.p-form textarea{min-height:110px}.p-field input:focus,.p-field select:focus,.p-field textarea:focus{outline:none;border-color:var(--accent);box-shadow:var(--focus)}.p-option{display:flex;gap:var(--space-3);width:100%;text-align:left;padding:14px 16px;margin-bottom:var(--space-2);border-radius:var(--radius-md);border:1.5px solid var(--line-strong);background:var(--surface);color:var(--text)}.p-option.selected,.p-option[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft)}.p-feedback,.p-status,.p-state,.p-save-status{padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);background:var(--surface-2);color:var(--text);margin:var(--space-3) 0}.p-pill{display:inline-flex;padding:3px 10px;border-radius:var(--radius-pill);background:var(--surface-2);color:var(--text-2);font-size:var(--text-xs);font-weight:650}.p-list-row{display:flex;justify-content:space-between;gap:var(--space-3);align-items:center;padding:var(--space-3) 0;border-bottom:1px solid var(--line)}.p-question-givens{background:var(--surface-2);border-radius:var(--radius-md);padding:var(--space-3) var(--space-4);margin:var(--space-3) 0}.p-question-givens h3{font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.08em;color:var(--text-3);margin-bottom:var(--space-2)}.p-code-source{font-family:var(--font-mono);font-size:var(--text-sm);white-space:pre;tab-size:2}.p-intro{color:var(--text-2)}.p-back{border:0;background:none;color:var(--text-2);font-weight:600;padding:0}.p-pack-diagram,.p-diagram-scroll,.p-subject-drawing-scroll,.p-engineering-figure,.p-channel-figure,.p-foundation-drawing,.p-structured-diagram{background:var(--paper);color:var(--paper-ink);border-radius:var(--radius-md)}.p-diagram-scroll,.p-subject-drawing-scroll{overflow-x:auto}.p-pdf-viewer iframe{width:100%;min-height:70vh;border:1px solid var(--line);border-radius:var(--radius-md);background:#fff}.p-math-answer{display:flex;flex-direction:column;gap:6px;width:100%;min-width:0;max-width:100%;font-size:var(--text-sm);font-weight:600;color:var(--text-2);scroll-margin-bottom:calc(var(--student-keyboard-height, 0px) + 90px)}.p-math-answer math-field{display:block;width:100%;min-width:0;min-height:60px;padding:12px 14px;border:1.5px solid var(--line-strong);border-radius:var(--radius-md);background:var(--bg-elevated);color:var(--text);font-size:1.35rem;--caret-color: var(--accent);--selection-background-color: var(--accent-soft);--contains-highlight-background-color: transparent}.p-math-answer math-field:focus-within{outline:none;border-color:var(--accent);box-shadow:var(--focus)}.p-question-prompt{margin-bottom:var(--space-4);overflow-wrap:anywhere}.p-question-prompt h2{font-size:var(--text-xl);line-height:1.4}.p-question-instructions{color:var(--text-2);font-size:var(--text-sm);margin:var(--space-2) 0 0}.p-question-instructions h3{font-size:var(--text-sm);margin:var(--space-3) 0 var(--space-1)}.math-fragment{max-width:100%;overflow-x:auto;vertical-align:middle}.p-lesson-reading{max-width:68ch;line-height:1.75;margin:var(--space-4) 0}.p-lesson-toc{display:grid;gap:var(--space-2);margin:var(--space-4) 0}.p-study-help{margin:var(--space-4) 0}.p-study-help>div{margin-top:var(--space-3);padding:var(--space-4);border:1px solid var(--line);border-radius:var(--radius-md)}.p-study-help details,.p-lesson-reading details{margin-top:var(--space-3)}.p-diagram-hint{margin:var(--space-4) 0}.p-pack-diagram{width:100%;min-width:0;margin:var(--space-4) 0;padding:var(--space-4);border:1px solid var(--line)}.p-pack-diagram img{display:block;width:100%;height:auto}.p-pack-diagram figcaption{color:#50606f;font-size:var(--text-sm);margin:var(--space-3) 0}.p-diagram-scroll{width:100%;min-width:0;max-height:75vh;overflow:auto}.p-structured-diagram{display:block;width:100%;min-width:420px}.p-diagram-label{color:#173e33;font-size:20px;line-height:1.5}.p-pdf-viewer{width:100%;min-width:0}:is(.p-feedback,.sp-feedback,.p-panel,.br-check,.ec-prediction,.lp-prediction).is-correct{background:var(--success-soft);color:var(--text);border-left:4px solid var(--success)}:is(.p-feedback,.sp-feedback,.p-panel,.br-check,.ec-prediction,.lp-prediction).is-incorrect{background:var(--danger-soft);color:var(--text);border-left:4px solid var(--danger)}:is(.p-feedback,.sp-feedback,.p-panel,.br-check).is-partial{background:var(--warning-soft);color:var(--text);border-left:4px solid var(--warning)}:is(.p-feedback,.sp-feedback).is-neutral{border-left:4px solid var(--line-strong)}.br-check,.ec-prediction{padding:.6rem .8rem;border-radius:var(--radius-sm)}.lp-dialog.lp-dialog{border:1px solid var(--line);border-radius:var(--radius-xl);background:var(--bg-elevated);color:var(--text);box-shadow:var(--shadow-lg)}.lp-dialog.lp-dialog::backdrop{background:var(--scrim);backdrop-filter:blur(4px)}.lp-entry.lp-entry{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg)}.lp-explore.lp-explore,.lp-predict.lp-predict{border-color:var(--line);border-radius:var(--radius-md)}.lp-next.lp-next,.lp-choices.lp-choices{border-top-color:var(--line)}.lp-table-wrap.lp-table-wrap td,.lp-table-wrap.lp-table-wrap th{border-bottom-color:var(--line)}.lp-figure.lp-figure{background:var(--paper);border-color:var(--line);border-radius:var(--radius-md)}.sp-dialog.sp-dialog .p-option[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft)}.guided-design-control{border:0;margin:0;padding:0;min-width:0}.guided-design-control legend{margin-bottom:.5rem}.guided-design-control .row{flex-wrap:wrap}.wordmark{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;font-size:1.15rem;letter-spacing:-.02em;color:var(--text)}.logo{display:block;flex:none;object-fit:contain;border-radius:6px}.skip-link{position:absolute;left:-999px;top:8px;z-index:100;padding:8px 14px;border-radius:var(--radius-pill);background:var(--accent);color:var(--on-accent)}.skip-link:focus{left:8px}.avatar{display:inline-grid;place-items:center;flex:none;width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--info));color:var(--on-accent);font-weight:800;font-size:var(--text-sm)}.shell{min-height:100dvh}.shell-main{min-width:0}.rail{display:none}.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:40;display:grid;grid-auto-flow:column;grid-auto-columns:1fr;height:calc(var(--tabbar-height) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:color-mix(in srgb,var(--bg-elevated) 88%,transparent);backdrop-filter:saturate(160%) blur(18px);-webkit-backdrop-filter:saturate(160%) blur(18px);border-top:1px solid var(--line)}.tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--text-3);font-size:11px;font-weight:650;text-decoration:none;-webkit-tap-highlight-color:transparent;transition:color var(--fast) var(--ease)}.tab:hover{text-decoration:none;color:var(--text-2)}.tab[aria-current=page]{color:var(--text)}.tab[aria-current=page] svg{color:var(--accent)}.shell-immersive .tabbar{background:color-mix(in srgb,var(--bg) 70%,transparent)}@media(min-width:900px){.shell{display:grid;grid-template-columns:var(--rail-width) minmax(0,1fr)}.tabbar{display:none}.rail{position:sticky;top:0;height:100dvh;display:flex;flex-direction:column;gap:var(--space-5);padding:var(--space-5) var(--space-4);border-right:1px solid var(--line);background:var(--bg)}.rail-brand{padding:var(--space-2) var(--space-3)}.rail-brand:hover{text-decoration:none}.rail-nav{display:flex;flex-direction:column;gap:4px}.rail-item{display:flex;align-items:center;gap:var(--space-3);padding:11px 14px;border-radius:var(--radius-md);color:var(--text-2);font-weight:650;text-decoration:none;transition:background-color var(--fast) var(--ease),color var(--fast) var(--ease)}.rail-item:hover{background:var(--surface-2);color:var(--text);text-decoration:none}.rail-item[aria-current=page]{background:var(--surface-2);color:var(--text)}.rail-item[aria-current=page] svg{color:var(--accent)}.rail-account{margin-top:auto;display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3);border-radius:var(--radius-md);color:var(--text);text-decoration:none;min-width:0}.rail-account:hover{background:var(--surface-2);text-decoration:none}.rail-account-text{min-width:0}.rail-account-text strong,.rail-account-text small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.rail-account-text strong{font-size:var(--text-sm)}}.player{position:fixed;inset:0 0 var(--student-keyboard-height, 0px) 0;z-index:50;display:flex;flex-direction:column;background:var(--bg);overflow:hidden}.player-top{flex:none;display:flex;align-items:center;gap:var(--space-3);padding:max(env(safe-area-inset-top),10px) var(--space-4) 10px;border-bottom:1px solid var(--line);background:var(--bg)}.player-top .progress{flex:1}.player-title{font-size:var(--text-sm);font-weight:700;color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.player-scroll{flex:1;overflow-y:auto;overscroll-behavior:contain}.player-body{width:100%;max-width:var(--content-width);margin:0 auto;padding:var(--space-5) var(--space-4) var(--space-7)}.player-bottom{flex:none;display:flex;gap:var(--space-3);justify-content:space-between;align-items:center;padding:var(--space-3) var(--space-4) max(env(safe-area-inset-bottom),12px);border-top:1px solid var(--line);background:var(--bg-elevated)}.player-bottom-inner{width:100%;max-width:var(--content-width);margin:0 auto;display:flex;gap:var(--space-3);align-items:center;justify-content:space-between}.player-bottom .btn{min-width:0;white-space:normal;line-height:1.2}.player-bottom .btn-primary{flex:1;max-width:340px;margin-left:auto}.question-task{font-size:var(--text-xl);font-weight:700;line-height:1.35;letter-spacing:-.01em;margin:0 0 var(--space-4)}.question-given{background:var(--surface-2);border-radius:var(--radius-md);padding:var(--space-3) var(--space-4);margin-bottom:var(--space-4);color:var(--text-2);font-size:var(--text-sm)}.visual-box{margin:0 0 var(--space-4)}.visual-box:empty{display:none}.avatar-photo{overflow:hidden;background:var(--surface-2, var(--surface))}.avatar-photo img{width:100%;height:100%;object-fit:cover;display:block}.avatar-link{display:inline-flex;border-radius:50%}.avatar-link:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.picture-field{gap:16px;align-items:center}.auth-shell{min-height:100dvh;display:flex;flex-direction:column;align-items:center;background:var(--bg);padding-top:env(safe-area-inset-top);padding-bottom:max(var(--space-6),env(safe-area-inset-bottom))}.auth-shell .landing-nav{width:100%}.auth-card{width:min(100% - 32px,420px);margin:var(--space-6) auto var(--space-4);padding:var(--space-6);border-radius:var(--radius-xl);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-md)}.auth-card h1{font-size:var(--text-2xl)}.auth-card>.muted{margin-bottom:var(--space-5)}.auth-card .notice{margin-bottom:var(--space-4)}.auth-links{display:flex;flex-direction:column;align-items:center;gap:var(--space-2);margin-top:var(--space-5);font-size:var(--text-sm);color:var(--text-3)}.auth-back{margin-top:auto}.feed{position:relative;min-height:0;height:calc(100dvh - var(--tabbar-height) - env(safe-area-inset-bottom));display:flex;flex-direction:column}@media(min-width:900px){.feed{height:100dvh}}.feed-header{position:relative;flex:none;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);padding:max(env(safe-area-inset-top),10px) max(var(--space-4),calc((100% - 600px)/2)) 10px;background:var(--bg);border-bottom:1px solid var(--line)}.feed-header>*{pointer-events:auto}.feed-course{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;column-gap:6px;border:0;background:none;text-align:left;color:var(--text);padding:4px 0;min-width:0;flex:1;min-height:44px}.feed-course-label{grid-column:1 / -1;font-family:var(--font-display);font-weight:800;font-size:var(--text-xl);letter-spacing:-.02em}.feed-course-name{font-size:var(--text-sm);color:var(--text-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:52vw}.feed-course svg{color:var(--text-3)}.spark-count.pulse svg{animation:pop .5s var(--ease)}.streak{font-variant-numeric:tabular-nums}.feed-banner{position:relative;flex:none;margin:8px auto;max-width:calc(100% - 24px);z-index:6;display:inline-flex;gap:var(--space-2);align-items:center;padding:6px 14px;border-radius:var(--radius-pill);background:var(--surface-3);color:var(--text);font-size:var(--text-xs);font-weight:650;white-space:normal;flex-wrap:wrap;box-shadow:var(--shadow-md)}.feed-scroller{flex:1;min-height:0;min-width:0;overflow-y:auto;scroll-snap-type:y proximity;overscroll-behavior-y:contain;scrollbar-width:none}.feed-scroller::-webkit-scrollbar{display:none}.feed-card{scroll-snap-align:start;min-height:100%;display:flex;justify-content:center;padding:var(--space-4) max(var(--space-4),env(safe-area-inset-left)) var(--space-5) max(var(--space-4),env(safe-area-inset-right));border-bottom:1px solid var(--line)}.feed-card-inner{width:100%;max-width:600px;min-width:0;display:flex;flex-direction:column;gap:var(--space-4)}.feed-card-empty{align-items:center}.feed-card-meta{display:flex;gap:var(--space-2);flex-wrap:wrap}.feed-task{font-size:clamp(1.3rem,3.6vw,1.65rem);font-weight:750;line-height:1.3;letter-spacing:-.015em;margin:0}.feed-given{background:var(--surface-2);border-radius:var(--radius-md);padding:10px 14px;font-size:var(--text-sm)}.feed-given p{margin:var(--space-2) 0 0;color:var(--text-2)}.feed-visual:empty{display:none}.feed-visual{border-radius:var(--radius-lg);overflow:hidden}.feed-actions{display:flex;gap:var(--space-3)}.feed-actions .btn-primary{flex:1}.feed-hint{padding:0 18px}.feed-footer{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}.feed-footer button,.feed-given summary,.feed-visual summary{min-height:44px}.feed-hud{flex:none}.feed .feed-card-meta .chip{max-width:100%;white-space:normal;overflow-wrap:anywhere}.feed .option{min-height:48px}.feed .option>:last-child{min-width:0;overflow-wrap:anywhere}.feed .feed-visual input[type=range]{min-height:44px}.feed .feed-visual input:not([type=range]),.feed textarea{font-size:16px}.feed .feed-actions .btn{min-height:48px;white-space:normal}.feed-visual .katex-display{overflow-x:auto;overflow-y:hidden}@media(max-width:600px){.feed-hud .streak-chip,.feed-hud .spark-count{display:none}.feed-course-name{max-width:100%}.feed-card-inner{gap:12px}.feed-task{font-size:clamp(1.15rem,4.5vw,1.4rem)}.feed .option{padding:12px;gap:10px}.feed-banner{font-size:12px;line-height:1.4;border-radius:12px}.feed-banner svg{flex:none}.feed-banner .link-btn{min-height:44px}}@media(min-width:1180px)and (min-height:620px){.feed .feed-header{padding-inline:max(var(--space-5),calc((100% - 1160px)/2))}.feed-card{padding-block:var(--space-6)}.feed .feed-card-inner:has(>.feed-visual:not(:empty)){max-width:1160px;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(360px,1fr);grid-template-rows:repeat(8,auto) 1fr;column-gap:var(--space-7);row-gap:0;align-content:start}.feed .feed-card-inner:has(>.feed-visual:not(:empty))>*{grid-column:2;margin-bottom:var(--space-4)}.feed .feed-card-inner:has(>.feed-visual:not(:empty))>.feed-visual{grid-column:1;grid-row:1 / -1;align-self:start;position:sticky;top:0;margin-bottom:0}}@media(max-height:500px)and (orientation:landscape){.feed-header{padding-block:4px}.feed-course-label{font-size:1rem}.feed-card-inner{gap:10px}.feed-scroller{scroll-snap-type:none}}.subtle-link{color:var(--text-3);font-size:var(--text-sm);display:inline-flex;align-items:center;gap:4px}.subtle-link:hover{color:var(--text)}.result-sparks{color:var(--spark);margin-left:6px}.feed-visual .ec-canvas,.visual-box .ec-canvas,.demo-card .ec-canvas{background:var(--paper);color:var(--paper-ink);border-radius:var(--radius-lg);padding:var(--space-3)}.feed-visual .ec-canvas .p-field,.visual-box .ec-canvas .p-field,.feed-visual .ec-canvas details,.visual-box .ec-canvas details{color:var(--paper-ink)}.feed-visual .ec-canvas summary,.visual-box .ec-canvas summary,.feed-visual .ec-canvas .p-muted,.visual-box .ec-canvas .p-muted,.demo-card .ec-canvas .p-muted{color:#43515f}.feed-visual .ec-canvas .p-link,.visual-box .ec-canvas .p-link{color:#0a7f57}.feed-visual input[type=range],.visual-box input[type=range],.demo-card input[type=range]{width:100%;accent-color:#0a9f6c;height:28px}.next-card h2{font-size:var(--text-2xl);margin-bottom:var(--space-1)}.next-progress{display:grid;gap:6px;margin-top:var(--space-5)}.topic-map{list-style:none;padding:0;margin:0 0 var(--space-6);position:relative}.topic{position:relative;display:grid;grid-template-columns:36px 1fr;gap:var(--space-3);padding-bottom:var(--space-3)}.topic:not(:last-child):before{content:"";position:absolute;left:17px;top:38px;bottom:0;width:2px;background:var(--line)}.topic-done:not(:last-child):before{background:var(--accent)}.topic-node{position:relative;z-index:1;display:grid;place-items:center;width:36px;height:36px;margin-top:8px;border-radius:50%;background:var(--surface-2);border:2px solid var(--line-strong);color:var(--text-2);font-weight:800;font-size:var(--text-sm)}.topic-done .topic-node{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}.topic-current .topic-node{border-color:var(--accent);color:var(--accent);box-shadow:0 0 0 5px var(--accent-soft)}.topic-review .topic-node{border-color:var(--info);color:var(--info)}.topic-locked .topic-node{color:var(--text-3)}.topic-body{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;min-width:0}.topic-current .topic-body{border-color:color-mix(in srgb,var(--accent) 45%,var(--line))}.topic-head{display:flex;align-items:center;gap:var(--space-3);width:100%;padding:14px 16px;border:0;background:none;color:var(--text);text-align:left}.topic-head .grow{flex:1;min-width:0}.topic-head strong{display:block;font-weight:700}.topic-head small{display:block}@media(max-width:520px){.topic-head{display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"title title chevron" "chip mastery chevron";gap:6px 0}.topic-head .grow{grid-area:title}.topic-head>.chip{grid-area:chip;justify-self:start;margin-right:8px}.topic-head>.topic-chevron{margin-left:8px}.topic-head>.mastery{grid-area:mastery;justify-self:start}.topic-head>.topic-chevron{grid-area:chevron}}.topic-chevron{color:var(--text-3);transition:transform var(--fast) var(--ease)}.topic.is-open .topic-chevron{transform:rotate(180deg)}.topic-locked .topic-head strong{color:var(--text-2)}.topic-panel{padding:0 16px 16px;animation:rise var(--normal) var(--ease)}.topic-actions{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:var(--space-2);margin:var(--space-2) 0 var(--space-3)}.action-tile{display:flex;flex-direction:column;align-items:flex-start;gap:var(--space-2);padding:14px;border-radius:var(--radius-md);border:1px solid var(--line);background:var(--surface-2);color:var(--text);font-weight:650;font-size:var(--text-sm);text-align:left;transition:border-color var(--fast) var(--ease),transform var(--fast) var(--ease)}.action-tile svg{color:var(--accent)}.topic-actions>.exam-availability-note{grid-column:1 / -1;margin:4px 0 0}.action-tile:hover:not(:disabled){border-color:var(--accent)}.action-tile:active:not(:disabled){transform:scale(.98)}.action-tile:disabled{opacity:.45}.exam-card-wrap .p-panel{border-radius:var(--radius-xl)}.how-it-works{margin-top:var(--space-5)}.reader{max-width:680px}.reader-title{font-size:var(--text-2xl)}.reader p{font-size:1.0625rem;line-height:1.7}.reader h2{font-size:var(--text-2xl)}.answer-format{margin-top:var(--space-3)}.outcome{text-align:center;padding:var(--space-6) var(--space-4);border-radius:var(--radius-xl);background:var(--surface);border:1px solid var(--line);margin-bottom:var(--space-5);animation:rise var(--slow) var(--ease)}.outcome-win{background:linear-gradient(180deg,var(--accent-soft),var(--surface) 70%);border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}.outcome-badge{display:inline-grid;place-items:center;width:64px;height:64px;border-radius:20px;background:var(--accent);color:var(--on-accent);margin-bottom:var(--space-4);animation:pop .6s var(--ease)}.outcome h1{font-size:var(--text-2xl)}.outcome-score{font-size:3rem;font-weight:820;line-height:1;margin:var(--space-2) 0 var(--space-4);font-variant-numeric:tabular-nums}.outcome-score span{font-size:1.5rem;color:var(--text-3)}.review-item{border-left:3px solid var(--line-strong);padding:var(--space-2) 0 var(--space-2) var(--space-4);margin:var(--space-4) 0}.review-item.is-correct{border-left-color:var(--success)}.review-item.is-wrong{border-left-color:var(--danger)}.p-step-help{background:var(--surface-2);border-radius:var(--radius-md);padding:var(--space-3) var(--space-4)}.visual-box>section,.visual-box>figure{margin:0}.practice-hero h2{font-size:var(--text-2xl);margin-bottom:var(--space-1)}.size-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-2);margin-top:var(--space-4)}.size-option{display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:var(--space-4);border-radius:var(--radius-md);border:1.5px solid var(--line-strong);background:var(--surface-2);color:var(--text);text-align:left;transition:border-color var(--fast) var(--ease),transform var(--fast) var(--ease)}.size-option strong{font-size:var(--text-lg)}.size-option:hover:not(:disabled){border-color:var(--accent)}.size-option:active:not(:disabled){transform:scale(.98)}@media(max-width:480px){.size-picker{grid-template-columns:1fr}.size-option{flex-direction:row;justify-content:space-between;align-items:center}}.topic-bars{display:grid;gap:var(--space-2);margin-bottom:var(--space-2)}.topic-bar{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);border:1px solid var(--line);background:var(--surface);color:var(--text);text-align:left}.topic-bar .grow{flex:1;min-width:0;display:grid;gap:6px}.topic-bar strong{font-size:var(--text-sm)}.topic-bar:hover:not(:disabled){border-color:var(--line-strong)}.topic-bar>svg{color:var(--text-3)}.embedded-tool>section,.embedded-tool>.p-panel{border-radius:var(--radius-xl)}.embedded-tool:empty{display:none}.feedback-page .p-panel{border-radius:var(--radius-xl)}.approval-request{flex-wrap:wrap}.approval-request>.grow{flex-basis:160px;overflow-wrap:anywhere}.approval-request>.stack{max-width:100%}li.list-item{display:flex}.profile-head{display:flex;align-items:center;gap:var(--space-4);margin-bottom:var(--space-5)}.profile-head h1{font-size:var(--text-2xl);margin:0}.profile-head p{margin:2px 0 0}.avatar-lg{width:60px;height:60px;font-size:var(--text-lg)}.spark-text{color:var(--spark)}.evidence-list{list-style:none;padding:0;margin:var(--space-4) 0 0;display:grid;gap:var(--space-3)}.evidence-list li{display:flex;align-items:center;gap:var(--space-3);font-size:var(--text-sm)}.evidence-list .grow{flex:1;min-width:0}.dot{flex:none;width:10px;height:10px;border-radius:50%;background:var(--surface-3)}.dot-open{background:var(--info)}.dot-done{background:var(--accent)}.course-card{display:flex;flex-direction:column;align-items:flex-start;gap:var(--space-2)}.course-card h3,.course-card p{margin:0}.course-card.is-active{border-color:color-mix(in srgb,var(--accent) 50%,var(--line))}.course-desc{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;font-size:var(--text-sm)}.course-card .btn,.course-card .chip{margin-top:auto}.course-icon{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:14px;background:var(--accent-soft);color:var(--accent);margin-bottom:var(--space-2)}.stepper{list-style:none;padding:0;margin:0;display:flex;gap:var(--space-2);flex-wrap:wrap}.stepper li{display:flex;align-items:center;gap:var(--space-2);padding:6px 14px 6px 6px;border-radius:var(--radius-pill);background:var(--surface-2);color:var(--text-3);font-size:var(--text-sm);font-weight:650}.stepper li span{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--surface-3);font-size:var(--text-xs)}.stepper li.current{color:var(--text)}.stepper li.current span{background:var(--accent);color:var(--on-accent)}.stepper li.done span{background:var(--accent-soft);color:var(--accent)}.file-btn{position:relative;overflow:hidden}.file-btn input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer}.credential-box{display:grid;gap:var(--space-3);padding:var(--space-4);border-radius:var(--radius-md);background:var(--surface-2);margin-bottom:var(--space-4)}.credential-box small{display:block}.credential-box code{font-size:var(--text-lg);user-select:all}.admin-tool h1{font-size:var(--text-xl)}.admin-tool .p-intro{display:none}.onboarding{min-height:100dvh;display:flex;flex-direction:column;max-width:560px;margin:0 auto;padding:0 var(--space-4)}.onboarding-top{display:flex;align-items:center;gap:var(--space-3);padding:max(env(safe-area-inset-top),14px) 0 14px}.onboarding-top .progress{flex:1}.onboarding-body{flex:1;padding:var(--space-5) 0}.onboarding-step{animation:rise var(--normal) var(--ease)}.onboarding-step h1{font-size:clamp(1.8rem,6vw,2.4rem);margin-bottom:var(--space-3)}.onboarding-points{list-style:none;padding:0;margin:var(--space-6) 0 0;display:grid;gap:var(--space-4)}.onboarding-points li{display:flex;gap:var(--space-4);align-items:flex-start}.onboarding-points li>span{display:inline-grid;place-items:center;flex:none;width:44px;height:44px;border-radius:14px;background:var(--accent-soft);color:var(--accent)}.onboarding-points p{margin:2px 0 0;color:var(--text-2)}.choice-list{display:grid;gap:var(--space-2);margin-top:var(--space-5)}.choice{display:flex;align-items:center;gap:var(--space-3);width:100%;padding:14px 16px;border-radius:var(--radius-lg);border:1.5px solid var(--line-strong);background:var(--surface);color:var(--text);text-align:left}.choice .grow{flex:1;min-width:0}.choice strong,.choice small{display:block}.choice[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft)}.choice>svg{color:var(--accent)}.choice-icon{display:inline-grid;place-items:center;flex:none;width:40px;height:40px;border-radius:12px;background:var(--surface-2);color:var(--text-2);font-weight:800}.chip-row{display:flex;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-4)}.choice-chip{padding:10px 16px;border-radius:var(--radius-pill);border:1.5px solid var(--line-strong);background:var(--surface);color:var(--text);font-weight:650}.choice-chip[aria-pressed=true]{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}.onboarding-bottom{padding:var(--space-4) 0 max(env(safe-area-inset-bottom),20px)}.mock-card{display:flex;align-items:center;gap:var(--space-4);margin-bottom:var(--space-4)}.mock-card .grow{flex:1;min-width:0;display:grid;gap:6px}.mock-card p{margin:0;font-size:var(--text-sm)}.mock-icon{display:inline-grid;place-items:center;flex:none;width:52px;height:52px;border-radius:16px;background:var(--surface-2);color:var(--text-3)}.mock-card.is-unlocked{border-color:color-mix(in srgb,var(--spark) 45%,var(--line));background:linear-gradient(90deg,rgba(255,181,71,.1),var(--surface) 70%)}.mock-card.is-unlocked .mock-icon{background:radial-gradient(circle at 30% 30%,#ffd88a,var(--spark));color:#3a2300}@media(max-width:480px){.mock-card{flex-wrap:wrap}.mock-card .btn{width:100%}}.drill-list .list-item>svg:last-child{color:var(--text-3)}button.list-item:disabled{opacity:.6}.extra-center{align-items:center;text-align:center;justify-content:center}.extra-center .feed-actions{width:100%}.extra-icon{display:inline-grid;place-items:center;width:64px;height:64px;border-radius:20px;background:var(--accent-soft);color:var(--accent)}.review-card .extra-icon{background:var(--info-soft);color:var(--info)}.learn-card .feed-card-inner{justify-content:center}.learn-text{font-size:clamp(1.1rem,3.2vw,1.3rem);line-height:1.6;margin:var(--space-3) 0}.exam-card .p-question-prompt h2{font-size:clamp(1.2rem,3.4vw,1.5rem)}.insight-card{display:grid;gap:var(--space-3)}.insight-card h3,.insight-card p{margin:0}.insight-rows{display:grid;gap:6px;font-size:var(--text-sm)}.insight-rows>div{display:flex;justify-content:space-between;gap:var(--space-3);color:var(--text-2)}.insight-rows strong{color:var(--text)}.topic-divider{list-style:none;padding:var(--space-4) 0 var(--space-3) 48px;font-size:var(--text-xs);font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--text-3)}.course-date{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--radius-pill);border:1px dashed var(--line-strong);background:transparent;color:var(--text-2);font-size:var(--text-xs);font-weight:650}.course-date:hover{border-style:solid;color:var(--text)}.course-date svg{color:var(--accent)}.league{display:grid;gap:var(--space-3)}.league-list{list-style:none;margin:0;padding:0;display:grid;gap:4px}.league-row{display:flex;align-items:center;gap:var(--space-3);padding:8px 10px;border-radius:var(--radius-md)}.league-row .grow{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.league-me{background:var(--accent-soft)}.league-gap{margin-top:10px;position:relative}.league-gap:before{content:"⋯";position:absolute;top:-14px;left:16px;color:var(--text-3);font-size:12px}.league-rank{width:24px;text-align:center;font-weight:800;color:var(--text-3)}.league-rank.rank-1{color:var(--spark)}.league-row .avatar{width:30px;height:30px;font-size:12px}.danger-text{color:var(--danger)}.join-code{align-items:flex-end;gap:var(--space-3);margin-bottom:var(--space-4)}.code-shortcut{align-items:flex-end;gap:var(--space-3);margin-top:var(--space-4);padding-top:var(--space-4);border-top:1px solid var(--line)}.join-code input,.code-shortcut input,.invite-code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.08em}.auth-legal{text-align:center;margin:var(--space-3) 0 var(--space-6)}.auth-legal a{color:inherit}.invite-form{align-items:flex-end;gap:var(--space-3);flex-wrap:wrap}.funnel{display:grid;gap:var(--space-3)}.funnel-step{display:grid;grid-template-columns:1fr auto 3.5em;align-items:center;gap:var(--space-3);position:relative;padding:8px 12px;border-radius:var(--radius-md);overflow:hidden}.funnel-bar{position:absolute;inset:0 auto 0 0;width:calc(var(--share) * 100%);background:var(--accent-soft);z-index:0;transition:width .4s ease}.funnel-step>:not(.funnel-bar){position:relative;z-index:1}.funnel-step small{text-align:right;color:var(--text-3)}.weekly{display:grid;grid-template-columns:repeat(8,1fr);gap:6px;align-items:end;height:96px;margin-top:var(--space-2)}.weekly-col{display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%;gap:4px}.weekly-col>div{width:100%;min-height:2px;background:var(--accent);border-radius:4px 4px 0 0}.weekly-col small{font-size:10px;color:var(--text-3)}.link-button{background:none;border:0;padding:0;color:inherit;text-align:left;cursor:pointer;font:inherit}.link-button:hover strong{text-decoration:underline}.error-item{align-items:flex-start}.error-detail{white-space:pre-wrap;font-size:11px;max-height:240px;overflow:auto;background:var(--surface-2);padding:var(--space-3);border-radius:var(--radius-sm);margin-top:var(--space-2)}.legal-shell{min-height:100dvh;background:var(--bg)}.legal-page{max-width:720px;margin:0 auto;padding:var(--space-6) 16px var(--space-8);line-height:1.6}.legal-page h2{margin-top:var(--space-6);font-size:var(--text-lg)}.legal-page ul{padding-left:1.2em;display:grid;gap:var(--space-2)}@media(max-width:640px){.invite-form>.field:first-child{flex:1 1 100%!important}.invite-form>.field{min-width:0}.invite-form>.btn{flex:1 1 100%}}.more-stats,.more-settings{margin-top:var(--space-5)}.more-stats>.dash-grid{margin-top:var(--space-4)}.task-switch{margin-bottom:var(--space-4)}.course-card .course-desc{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.streak-chip{display:inline-flex;align-items:center;gap:4px;padding:6px 10px;border-radius:var(--radius-pill);border:0;background:var(--surface-2);color:var(--text-3);font-weight:800;font-variant-numeric:tabular-nums;font-size:var(--text-sm)}.streak-chip.is-lit{background:#ff7a4529;color:#ff7a45}.streak-chip.is-lit svg{fill:currentColor;fill-opacity:.25;animation:flicker 2.4s ease-in-out infinite}.goal-ring{position:relative;display:inline-grid;place-items:center;flex:none;padding:0;border:0;background:none;color:var(--text)}.goal-ring svg{position:absolute;inset:0}.goal-ring-label{position:relative;font-size:12px;font-weight:800;font-variant-numeric:tabular-nums}.goal-ring.is-done{color:var(--spark)}.level-bar{display:flex;align-items:center;gap:var(--space-3)}.level-bar-track{flex:1;min-width:0;display:grid;gap:6px}.level-bar-text strong{font-size:var(--text-sm)}.level-badge{display:inline-grid;place-items:center;flex:none;width:46px;height:46px;border-radius:14px;background:linear-gradient(140deg,var(--accent),var(--info));color:var(--on-accent);font-weight:850;font-size:var(--text-lg);line-height:1;box-shadow:0 6px 18px color-mix(in srgb,var(--accent) 35%,transparent)}.level-badge small{display:block;font-size:10px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:inherit;opacity:.8}.level-bar-compact .level-badge{width:34px;height:34px;border-radius:10px;font-size:var(--text-sm)}.level-bar-compact .level-badge small{font-size:8px}.combo-meter{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:var(--radius-pill);background:var(--info-soft);color:var(--info);font-size:var(--text-xs);font-weight:800;animation:pop .42s var(--ease)}.combo-meter.is-hot{background:linear-gradient(90deg,#ff7a4533,#ffb54733);color:#ff8a3d}.stars{display:inline-flex;gap:1px}.stars svg{fill:var(--surface-3)}.stars svg.is-on{fill:var(--spark)}.badge-grid{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:var(--space-3)}.badge{display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:var(--space-4);border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--surface);min-height:150px}.badge strong{font-size:var(--text-sm);margin-top:var(--space-2)}.badge small{line-height:1.35;flex:1}.badge-medal{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--surface-2);color:var(--text-3)}.badge.is-earned{border-color:color-mix(in srgb,var(--spark) 40%,var(--line));background:linear-gradient(180deg,rgba(255,181,71,.08),var(--surface) 60%)}.badge.is-earned .badge-medal{background:radial-gradient(circle at 30% 30%,#ffd88a,var(--spark));color:#3a2300;box-shadow:0 4px 14px #ffb54759}.badge-progress{display:block;width:100%;height:5px;border-radius:var(--radius-pill);background:var(--surface-3);overflow:hidden;margin-top:6px}.badge-progress>span{display:block;height:100%;background:var(--accent)}.nav-dot{position:absolute;top:6px;right:calc(50% - 18px);width:9px;height:9px;border-radius:50%;background:var(--spark);box-shadow:0 0 0 2px var(--bg-elevated)}.tab,.rail-item{position:relative}.rail-item .nav-dot{position:static;margin-left:auto;box-shadow:none}.level-up{text-align:center;padding:var(--space-3) 0}.level-up-badge{display:inline-grid;place-items:center;width:110px;height:110px;border-radius:32px;margin-bottom:var(--space-4);background:linear-gradient(140deg,var(--accent),var(--info));color:var(--on-accent);font-size:3rem;font-weight:850;line-height:1;animation:pop .7s var(--ease)}.level-up-badge span{display:block;font-size:var(--text-sm);letter-spacing:.08em;text-transform:uppercase}.toast-reward{background:linear-gradient(90deg,#ffb547,#ff8a3d);color:#2a1600}#celebration-layer{position:fixed;inset:0;pointer-events:none;z-index:90;overflow:hidden}.confetti{position:absolute;width:8px;height:12px;margin:-6px 0 0 -4px;border-radius:2px;animation:confetti-fly 1s cubic-bezier(.15,.7,.3,1) forwards}.confetti-round{width:9px;height:9px;border-radius:50%}@keyframes confetti-fly{0%{transform:translate(0) rotate(0);opacity:1}70%{opacity:1}to{transform:translate(var(--dx),calc(var(--dy) + 160px)) rotate(var(--rot));opacity:0}}.float-label{position:absolute;transform:translate(-50%,-50%);font-weight:900;font-size:1.6rem;letter-spacing:-.02em;white-space:nowrap;text-shadow:0 4px 18px rgba(0,0,0,.35);animation:float-up 1.1s var(--ease) forwards}.float-spark{color:var(--spark)}.float-xp{color:var(--accent)}.float-combo{color:#ff8a3d}@keyframes float-up{0%{transform:translate(-50%,-30%) scale(.6);opacity:0}20%{transform:translate(-50%,-80%) scale(1.15);opacity:1}to{transform:translate(-50%,-260%) scale(1);opacity:0}}.shake{animation:shake .42s cubic-bezier(.36,.07,.19,.97)}@keyframes shake{10%,90%{transform:translate(-2px)}20%,80%{transform:translate(4px)}30%,50%,70%{transform:translate(-7px)}40%,60%{transform:translate(7px)}}@keyframes flicker{0%,to{transform:scale(1) rotate(0)}50%{transform:scale(1.08) rotate(-3deg)}}.result-correct{animation:rise var(--normal) var(--ease),glow 1.2s var(--ease)}@keyframes glow{0%{box-shadow:0 0 color-mix(in srgb,var(--success) 45%,transparent)}to{box-shadow:0 0 0 18px transparent}}@media(prefers-reduced-motion:reduce){.streak-chip.is-lit svg,.combo-meter,.level-up-badge,.result-correct,.shake{animation:none}}.feed-hud{display:flex;align-items:center;gap:8px}.rail-account .streak-chip{margin-left:auto}.today-panel{display:flex;align-items:center;gap:var(--space-5);padding:var(--space-4);border-radius:var(--radius-lg);background:var(--surface-2)}.today-big{display:block;font-size:var(--text-3xl);font-weight:850;line-height:1;margin-bottom:6px;font-variant-numeric:tabular-nums}.today-panel .goal-ring-label{font-size:22px}.recap-card{align-items:center;background:radial-gradient(70% 50% at 50% 0%,color-mix(in srgb,var(--accent) 16%,transparent),transparent 70%),var(--bg)}.recap-inner{max-width:460px;text-align:center;align-items:stretch}.recap-title{font-size:var(--text-3xl);margin:0}.recap-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-2)}.recap-stats>div{padding:var(--space-4) var(--space-2);border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--line)}.recap-stats strong{display:block;font-size:var(--text-2xl);font-weight:850;font-variant-numeric:tabular-nums}.recap-stats span{font-size:var(--text-xs);color:var(--text-3)}.recap-row{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--line);text-align:left}.recap-row p{margin:0;font-size:var(--text-sm);color:var(--text-2)}.recap-row .grow{flex:1;min-width:0}.weekly-goal{display:flex;align-items:center;gap:var(--space-3);padding:6px 14px 6px 6px;border-radius:var(--radius-pill);background:var(--surface);border:1px solid var(--line)}.weekly-goal strong{display:block;font-size:var(--text-md);line-height:1.1}.weekly-goal small{display:block;font-size:var(--text-xs)}.topic-boss .topic-node{width:40px;height:40px;margin-left:-2px;border-radius:12px;background:var(--surface-2)}.topic-boss.is-unlocked .topic-node{background:radial-gradient(circle at 30% 30%,#ffd88a,var(--spark));border-color:var(--spark);color:#3a2300;box-shadow:0 0 0 5px #ffb5472e;animation:flicker 3s ease-in-out infinite}.topic-boss.is-unlocked .topic-body{border-color:color-mix(in srgb,var(--spark) 45%,var(--line));background:linear-gradient(90deg,rgba(255,181,71,.1),var(--surface) 70%)}.boss-progress{display:block;width:64px;height:6px;border-radius:var(--radius-pill);background:var(--surface-3);overflow:hidden}.boss-progress>span{display:block;height:100%;background:var(--spark)}.topic-head .stars{flex:none}.outcome-stars{margin:var(--space-2) 0 var(--space-3)}.outcome-stars svg{animation:pop .5s var(--ease) backwards}.outcome-stars svg:nth-child(2){animation-delay:.15s}.outcome-stars svg:nth-child(3){animation-delay:.3s}.answer-dots{display:flex;justify-content:center;flex-wrap:wrap;gap:6px;margin:0 0 var(--space-4)}.answer-dot{width:14px;height:14px;border-radius:50%;background:var(--surface-3)}.answer-dot.is-correct{background:var(--success)}.answer-dot.is-wrong{background:var(--danger)}.challenges{padding:var(--space-4);border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--line)}.challenges.is-perfect{border-color:color-mix(in srgb,var(--spark) 45%,var(--line));background:linear-gradient(180deg,rgba(255,181,71,.1),var(--surface) 70%)}.challenges-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:var(--space-3)}.challenges ul{list-style:none;padding:0;margin:0;display:grid;gap:var(--space-2)}.challenges li{display:flex;align-items:center;gap:var(--space-3);font-size:var(--text-sm)}.challenges li .grow{flex:1}.challenges li.is-done .grow{color:var(--text-3);text-decoration:line-through;text-decoration-color:var(--text-3)}.challenge-check{display:inline-grid;place-items:center;flex:none;width:26px;height:26px;border-radius:50%;background:var(--surface-2);color:var(--text-3)}.challenges li.is-done .challenge-check{background:var(--accent);color:var(--on-accent);animation:pop .4s var(--ease)}.you-hero{display:grid;gap:var(--space-5)}.you-hero-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:var(--space-4)}.you-streak,.you-goal{display:flex;align-items:center;gap:var(--space-3)}.you-streak strong,.you-goal strong,.you-streak small{display:block}.you-streak .streak-chip{padding:12px;font-size:var(--text-lg)}.goal-picker{margin-top:6px}.goal-picker button{padding:4px 12px}.mastery{display:inline-flex;align-items:center;gap:6px;flex:none}.mastery-bars{display:inline-flex;gap:3px}.mastery-bars i{display:block;width:14px;height:6px;border-radius:3px;background:var(--surface-3)}.mastery-1 .mastery-bars i:nth-child(-n+1),.mastery-2 .mastery-bars i:nth-child(-n+2){background:var(--info)}.mastery-3 .mastery-bars i{background:var(--accent)}.mastery-2 .mastery-bars i:nth-child(-n+2){background:var(--accent);opacity:.7}.mastery-label{font-size:var(--text-xs);font-weight:700;color:var(--text-3)}.mastery-3 .mastery-label{color:var(--accent)}.countdown{display:inline-flex;align-items:center;flex-wrap:wrap;gap:6px 10px;font-size:var(--text-sm);color:var(--text-2)}.countdown strong{color:var(--text)}.countdown-icon{display:inline-grid;place-items:center;color:var(--accent)}.countdown.is-urgent .countdown-icon,.countdown.is-urgent strong{color:var(--warning)}.countdown-ready{padding:2px 10px;border-radius:var(--radius-pill);background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:var(--text-xs)}.countdown-compact{font-size:var(--text-xs);gap:4px 8px}.countdown-edit{display:inline-flex;align-items:center;gap:8px;padding:4px 10px 4px 6px;margin-left:-6px;border:0;border-radius:var(--radius-pill);background:transparent;color:inherit;font:inherit}.countdown-edit:hover{background:var(--surface-2)}.countdown-change{font-size:var(--text-xs);font-weight:700;color:var(--accent)}.teach{max-width:1240px}.teach-head{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--space-4);margin-bottom:var(--space-5);flex-wrap:wrap;animation:rise var(--slow) var(--ease) backwards}.teach-head h1{margin:0;font-size:clamp(1.45rem,3.2vw,2.1rem);letter-spacing:-.025em}.teach-head-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:10px}.teach-head-meta .chip svg{margin-right:2px;vertical-align:-1px}.teach-course-select{position:relative;display:inline-flex;align-items:center}.teach-course-select select{appearance:none;border:0;background:none;color:var(--text);cursor:pointer;font:800 clamp(1.45rem,3.2vw,2.1rem)/1.15 var(--font-display);letter-spacing:-.025em;padding-right:30px}.teach-course-select svg{position:absolute;right:2px;pointer-events:none;color:var(--text-3)}.demo-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--radius-pill);border:1px dashed color-mix(in srgb,var(--info) 55%,transparent);background:var(--info-soft);color:var(--text-2);font-size:var(--text-xs);font-weight:650}.demo-badge svg{color:var(--info)}.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,138px),1fr));gap:var(--space-3);margin-bottom:var(--space-4)}.kpi{position:relative;display:grid;gap:6px;align-content:start;padding:16px 18px;border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);overflow:hidden;animation:rise var(--slow) var(--ease) backwards;animation-delay:calc(var(--i, 0) * 45ms);transition:transform var(--normal) var(--ease),border-color var(--normal) var(--ease),box-shadow var(--normal) var(--ease)}.kpi:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-md)}.kpi-head{display:flex;align-items:center;gap:8px}.kpi-label{font-size:var(--text-sm);color:var(--text-2);font-weight:600}.kpi-value{font-size:clamp(1.6rem,2.6vw,2rem);font-weight:780;letter-spacing:-.02em;line-height:1.1}.kpi-foot{display:flex;flex-wrap:wrap;gap:4px 10px;font-size:var(--text-xs);color:var(--text-3)}.kpi-icon{display:inline-grid;place-items:center;flex:none;width:30px;height:30px;border-radius:10px;background:var(--accent-soft);color:var(--accent)}.kpi-icon-success{background:var(--success-soft);color:var(--success)}.kpi-icon-warning{background:var(--warning-soft);color:var(--warning)}.kpi-icon-danger{background:var(--danger-soft);color:var(--danger)}.kpi-icon-info{background:var(--info-soft);color:var(--info)}.kpi-trend{display:inline-flex;align-items:center;gap:2px;font-weight:700;color:var(--text-2)}.kpi-trend-up{color:var(--success)}.kpi-trend-down{color:var(--danger)}.dash-grid{display:grid;gap:var(--space-4);grid-template-columns:repeat(3,minmax(0,1fr));align-items:start}.dash-grid>*{min-width:0}.span-2{grid-column:span 2}.span-3{grid-column:1 / -1}@media(max-width:1100px){.dash-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.span-3{grid-column:1 / -1}}@media(max-width:720px){.dash-grid{grid-template-columns:minmax(0,1fr)}.span-2,.span-3{grid-column:auto}}.dash-card{display:grid;gap:var(--space-3);align-content:start;animation:rise var(--slow) var(--ease) backwards;animation-delay:.12s}.dash-card-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}.dash-title{font-size:var(--text-md);font-weight:750;margin:0;letter-spacing:-.01em}.dash-section-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-end;margin:var(--space-6) 0 var(--space-3)}.dash-section-head p{margin:4px 0 0}.colchart{margin:0;display:grid;gap:6px}.colchart-plot{position:relative;height:var(--chart-h, 160px);padding-left:30px}.colchart-grid{position:absolute;inset:0 0 0 30px;display:flex;flex-direction:column;justify-content:space-between;pointer-events:none}.colchart-grid span{position:relative;height:0;border-top:1px solid var(--line)}.colchart-grid span:nth-child(2){border-top-color:color-mix(in srgb,var(--line) 55%,transparent)}.colchart-grid span[data-tick]:before{content:attr(data-tick);position:absolute;right:calc(100% + 8px);top:-.6em;font-size:10px;color:var(--text-3);font-variant-numeric:tabular-nums}.colchart-cols{position:relative;height:100%;display:grid;gap:2px;align-items:end}.colchart-col{position:relative;height:100%;display:flex;align-items:flex-end;justify-content:center;cursor:default}.colchart-col:before{content:"";position:absolute;inset:0 -1px;border-radius:6px;background:transparent;transition:background-color var(--fast) var(--ease)}.colchart-col.is-hover:before{background:color-mix(in srgb,var(--text) 5%,transparent)}.colchart-bar{position:relative;width:min(24px,72%);height:calc(var(--h) * 100%);min-height:2px;border-radius:4px 4px 0 0;background:color-mix(in srgb,var(--accent) 72%,var(--surface));transform-origin:bottom;animation:grow-up .7s var(--ease) backwards;animation-delay:calc(var(--i, 0) * 18ms + .15s);transition:background-color var(--fast) var(--ease)}.colchart-col.is-last .colchart-bar,.colchart-col.is-hover .colchart-bar{background:var(--accent)}.colchart-cap{position:absolute;bottom:calc(100% + 4px);left:50%;translate:-50% 0;font-size:11px;font-weight:750;color:var(--text);white-space:nowrap}.colchart-tip{position:absolute;z-index:5;bottom:calc(100% + 8px);left:50%;translate:-50% 0;display:grid;gap:2px;min-width:120px;padding:8px 10px;border-radius:10px;background:var(--bg-elevated);border:1px solid var(--line-strong);box-shadow:var(--shadow-md);font-size:var(--text-xs);color:var(--text-2);white-space:nowrap;pointer-events:none;animation:tip-in .14s var(--ease) backwards}.colchart-col:first-child .colchart-tip,.colchart-col:nth-child(2) .colchart-tip{left:0;translate:0 0}.colchart-col:last-child .colchart-tip,.colchart-col:nth-last-child(2) .colchart-tip{left:auto;right:0;translate:0 0}.colchart-tip strong{color:var(--text);font-size:var(--text-sm)}.colchart-axis{display:grid;gap:2px;padding-left:30px}.colchart-axis span{font-size:10px;color:var(--text-3);text-align:center;white-space:nowrap;overflow:visible}.meter{position:relative;display:inline-block;flex:1;min-width:48px;height:6px;border-radius:999px;background:var(--surface-3);overflow:hidden;vertical-align:middle}.meter>span{position:absolute;inset:0 auto 0 0;width:calc(var(--v) * 100%);border-radius:inherit;background:var(--accent);transform-origin:left;animation:grow-right .8s var(--ease) backwards;animation-delay:.2s}.meter-success>span{background:var(--success)}.meter-warning>span{background:var(--warning)}.meter-danger>span{background:var(--danger)}.meter-info>span{background:var(--info)}.meter-muted>span{background:var(--line-strong)}.topic-table{display:grid}.topic-row{display:grid;grid-template-columns:minmax(0,2.2fr) .7fr minmax(120px,1.4fr) .8fr minmax(110px,1.2fr);gap:12px;align-items:center;padding:10px 4px;border-top:1px solid var(--line);animation:rise var(--slow) var(--ease) backwards;animation-delay:calc(var(--i, 0) * 35ms + .15s)}.topic-row-student{grid-template-columns:minmax(0,2fr) minmax(120px,1.3fr) auto}.topic-row-head{border-top:0;padding-top:0;font-size:var(--text-xs);color:var(--text-3);font-weight:650;animation:none}.topic-name{display:grid;gap:2px;min-width:0}.topic-name strong{font-size:var(--text-sm)}.topic-name small{display:flex;gap:6px;align-items:center;color:var(--text-3);font-size:var(--text-xs)}.topic-meter{display:flex;align-items:center;gap:8px}.topic-meter b{font-size:var(--text-sm);min-width:3.2em;text-align:right;font-variant-numeric:tabular-nums}.num{font-variant-numeric:tabular-nums;font-size:var(--text-sm)}.trend{display:inline-flex;align-items:center;gap:2px;font-weight:700;color:var(--text-3)}.trend.is-up{color:var(--success)}.trend.is-down{color:var(--danger)}@media(max-width:720px){.topic-row{grid-template-columns:minmax(0,1fr) auto}.topic-row-head{display:none}.topic-row>:nth-child(2),.topic-row>:nth-child(4){display:none}.topic-row>.topic-meter{grid-column:1 / -1}.topic-row-student{grid-template-columns:minmax(0,1fr)}}.status-split{display:grid;gap:10px}.status-split-bar,.assign-progress-bar{display:flex;gap:2px;height:10px;border-radius:999px;overflow:hidden;background:var(--surface-3)}.status-split-bar span,.assign-progress-bar span{min-width:0;transform-origin:left;animation:grow-right .8s var(--ease) backwards}.seg-on_track{background:var(--success)}.seg-struggling{background:var(--warning)}.seg-inactive{background:var(--danger)}.seg-not_started{background:var(--line-strong)}.seg-progress{background:var(--accent);opacity:.55}.seg-empty{background:transparent}.status-split-legend,.assign-stats{display:flex;flex-wrap:wrap;gap:6px 14px;list-style:none;margin:0;padding:0;font-size:var(--text-xs);color:var(--text-2);align-items:center}.status-split-legend li,.assign-stats>span{display:inline-flex;align-items:center;gap:6px}.swatch{display:inline-block;width:10px;height:10px;border-radius:3px}.swatch.seg-empty{background:var(--surface-3)}.mini-list{list-style:none;margin:0;padding:0;display:grid;gap:2px}.mini-row{display:flex;align-items:center;gap:10px;padding:8px;margin:0 -8px;border-radius:var(--radius-md);color:var(--text);text-decoration:none;transition:background-color var(--fast) var(--ease),transform var(--fast) var(--ease)}.mini-row:hover{background:var(--surface-2);text-decoration:none;transform:translate(2px)}.mini-row strong{display:block;font-size:var(--text-sm)}.mini-row small{display:flex;align-items:center;gap:4px;color:var(--text-3);font-size:var(--text-xs)}.mini-row .grow{min-width:0}.mini-avatar,.student-avatar{display:inline-grid;place-items:center;flex:none;width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 70%,var(--surface)),color-mix(in srgb,var(--info) 70%,var(--surface)));color:var(--on-accent);font-weight:800;font-size:var(--text-sm)}.rank{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--surface-2);font-weight:800;font-size:var(--text-xs);flex:none}.rank-1{background:color-mix(in srgb,var(--spark) 30%,transparent);color:var(--spark)}.rank-2{background:color-mix(in srgb,var(--text-3) 25%,transparent)}.rank-3{background:color-mix(in srgb,#cd7f32 30%,transparent);color:#cd7f32}.assign-mini{display:grid;gap:6px;padding:8px 0;border-top:1px solid var(--line)}.assign-mini:first-child{border-top:0}.assign-mini .row{gap:8px}.assign-mini strong{font-size:var(--text-sm)}.gain-card{background:radial-gradient(80% 90% at 100% 0%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 70%),var(--surface)}.gain-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.gain-row>div{display:grid;gap:2px}.gain-row strong{font-size:clamp(1.8rem,3vw,2.4rem);font-weight:800;letter-spacing:-.03em;line-height:1}.gain-row svg{color:var(--text-3);flex:none}.gain-latest{color:var(--accent)}.gain-delta{display:inline-flex;align-items:center;gap:4px;margin:0;font-weight:750;font-size:var(--text-sm)}.gain-delta.is-up{color:var(--success)}.gain-delta.is-down{color:var(--danger)}.gain-card p.subtle{margin:0;font-size:var(--text-xs)}.roster-tools{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:10px}.search-field{flex:1;min-width:220px;display:flex;align-items:center;gap:8px;padding:0 14px;border-radius:var(--radius-pill);border:1px solid var(--line-strong);background:var(--surface);transition:border-color var(--fast) var(--ease),box-shadow var(--fast) var(--ease)}.search-field:focus-within{border-color:var(--accent);box-shadow:var(--focus)}.search-field svg{color:var(--text-3);flex:none}.search-field input{flex:1;min-height:42px;border:0;background:none;color:var(--text);font:inherit;outline:none}.sort-field{display:flex;align-items:center;gap:8px}.sort-field select,.field select,.field input,.field textarea{min-height:42px;padding:0 12px;border-radius:var(--radius-md);border:1px solid var(--line-strong);background:var(--surface);color:var(--text);font:inherit;transition:border-color var(--fast) var(--ease),box-shadow var(--fast) var(--ease)}.field textarea{padding:10px 12px;resize:vertical;min-height:64px}.sort-field select:focus,.field select:focus,.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:var(--focus)}.filter-chips{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:var(--space-4)}.filter-chip{display:inline-flex;align-items:center;gap:6px;min-height:34px;padding:0 12px;border-radius:var(--radius-pill);border:1px solid var(--line);background:var(--surface);color:var(--text-2);font:650 var(--text-sm)/1 var(--font-sans);cursor:pointer;transition:background-color var(--fast) var(--ease),color var(--fast) var(--ease),border-color var(--fast) var(--ease),transform var(--fast) var(--ease)}.filter-chip:hover{color:var(--text);border-color:var(--line-strong)}.filter-chip:active{transform:scale(.97)}.filter-chip span{padding:2px 7px;border-radius:999px;background:var(--surface-2);font-size:11px}.filter-chip[aria-selected=true]{background:var(--text);color:var(--bg);border-color:var(--text)}.filter-chip[aria-selected=true] span{background:color-mix(in srgb,var(--bg) 18%,transparent)}.roster{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);overflow:hidden}.roster-row{display:grid;grid-template-columns:minmax(200px,2.2fr) 1.1fr 1fr 1fr minmax(130px,1.4fr) .8fr .6fr .7fr .6fr;gap:12px;align-items:center;padding:10px 16px;border-top:1px solid var(--line);color:var(--text);text-decoration:none;transition:background-color var(--fast) var(--ease);animation:rise var(--slow) var(--ease) backwards;animation-delay:calc(var(--i, 0) * 22ms)}.roster-row:hover{background:var(--surface-2);text-decoration:none}.roster-head{border-top:0;font-size:var(--text-xs);color:var(--text-3);font-weight:650;background:var(--bg-elevated);animation:none}.roster-head:hover{background:var(--bg-elevated)}.roster-name{display:flex;align-items:center;gap:10px;min-width:0}.roster-name>span:last-child{display:grid;min-width:0}.roster-name strong{font-size:var(--text-sm);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.roster-name small{font-size:var(--text-xs);color:var(--text-3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.roster-row .chip{white-space:nowrap}@media(max-width:1080px){.roster{border:0;background:none;display:grid;gap:10px}.roster-head{display:none}.roster-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px;padding:14px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface)}.roster-name{grid-column:1 / -1}.roster-row>[data-label]:before{content:attr(data-label);display:block;font-size:11px;color:var(--text-3);font-weight:600;margin-bottom:2px}.roster-row>[data-label].topic-meter{flex-wrap:wrap}.roster-row>[data-label].topic-meter:before{width:100%}}.back-link{display:inline-flex;align-items:center;gap:4px;margin-bottom:var(--space-4);color:var(--text-2);font-weight:650;font-size:var(--text-sm)}.back-link:hover{color:var(--text);text-decoration:none}.student-head{display:flex;gap:16px;align-items:flex-start;margin-bottom:var(--space-5);animation:rise var(--slow) var(--ease) backwards}.student-head h1{margin:0;font-size:clamp(1.45rem,3.2vw,2rem)}.student-head p{margin:2px 0 0}.student-avatar{width:56px;height:56px;font-size:1.4rem}.calendar{display:grid;gap:8px}.calendar-grid{display:grid;grid-template-rows:repeat(7,14px);grid-auto-flow:column;grid-auto-columns:14px;gap:4px}.calendar-day,.calendar-pad{width:14px;height:14px;border-radius:4px}.calendar-day{background:var(--surface-3);animation:pop-in .4s var(--ease) backwards;animation-delay:calc(var(--i, 0) * 8ms + .15s)}.calendar-day.level-1{background:color-mix(in srgb,var(--accent) 30%,var(--surface-3))}.calendar-day.level-2{background:color-mix(in srgb,var(--accent) 52%,var(--surface-3))}.calendar-day.level-3{background:color-mix(in srgb,var(--accent) 76%,var(--surface-3))}.calendar-day.level-4{background:var(--accent)}.calendar-legend{display:flex;align-items:center;gap:4px;font-size:11px;color:var(--text-3)}.calendar-legend .calendar-day{animation:none}.exam-list,.answer-list,.missed-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}.exam-row{border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;transition:border-color var(--fast) var(--ease)}.exam-row.is-open{border-color:var(--line-strong)}.exam-row-head,.missed-head{width:100%;display:flex;align-items:center;gap:12px;padding:10px 12px;border:0;background:none;color:var(--text);text-align:left;font:inherit;cursor:pointer;transition:background-color var(--fast) var(--ease)}.exam-row-head:hover,.missed-head:hover{background:var(--surface-2)}.exam-row-head small,.missed-head small{display:block;font-size:var(--text-xs)}.exam-row-head>svg,.missed-head>svg{color:var(--text-3);transition:transform var(--normal) var(--ease);flex:none}.exam-row.is-open .exam-row-head>svg,.missed.is-open .missed-head>svg{transform:rotate(180deg)}.exam-score{display:inline-grid;place-items:center;min-width:52px;height:32px;padding:0 8px;border-radius:10px;background:var(--surface-2);font-weight:800;font-size:var(--text-sm);font-variant-numeric:tabular-nums;flex:none}.exam-score.is-pass{background:var(--success-soft);color:var(--success)}.exam-score.is-fail{background:var(--danger-soft);color:var(--danger)}.exam-questions{list-style:none;margin:0;padding:4px 12px 12px;display:grid;gap:8px;animation:rise var(--normal) var(--ease) backwards}.exam-questions li,.answer-list li{display:flex;gap:10px;align-items:flex-start}.answer-list li{padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius-md);background:var(--bg-elevated);animation:rise var(--slow) var(--ease) backwards;animation-delay:calc(var(--i, 0) * 20ms)}.q-mark{display:inline-grid;place-items:center;flex:none;width:24px;height:24px;border-radius:50%;background:var(--surface-2);color:var(--text-3);margin-top:1px}.is-correct>.q-mark{background:var(--success-soft);color:var(--success)}.is-wrong>.q-mark{background:var(--danger-soft);color:var(--danger)}.q-task{margin:0;font-size:var(--text-sm);font-weight:600;line-height:1.4}.q-answer{margin:2px 0 0;font-size:var(--text-sm);color:var(--text);overflow-wrap:anywhere}.answer-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex:none;max-width:40%}.answer-meta .chip{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}@media(max-width:720px){.answer-list li{flex-wrap:wrap}.answer-meta{flex-direction:row;flex-wrap:wrap;align-items:center;max-width:none;width:100%;padding-left:34px}}.danger-zone{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:var(--space-5);flex-wrap:wrap}.danger-zone p{margin:4px 0 0}.missed{border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;animation:rise var(--slow) var(--ease) backwards;animation-delay:calc(var(--i, 0) * 30ms)}.missed.is-open{border-color:var(--line-strong)}.missed-rank{display:inline-grid;place-items:center;flex:none;width:26px;height:26px;border-radius:8px;background:var(--danger-soft);color:var(--danger);font-weight:800;font-size:var(--text-xs)}.missed-task{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:var(--text-sm)}.missed-head .grow{min-width:0}.missed-score{width:150px;flex:none}.missed-body{padding:0 12px 12px 50px;display:grid;gap:8px;animation:rise var(--normal) var(--ease) backwards}.missed-options{list-style:none;margin:0;padding:0;display:grid;gap:6px}.missed-options li{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:10px;border:1px solid var(--line);font-size:var(--text-sm)}.missed-options li.is-correct{border-color:color-mix(in srgb,var(--success) 50%,var(--line));background:var(--success-soft)}.missed-options li.is-common{border-color:color-mix(in srgb,var(--warning) 55%,var(--line));background:var(--warning-soft)}.missed-options li.is-common .q-mark{background:var(--warning-soft);color:var(--warning)}.missed-tip{display:flex;gap:6px;align-items:center;margin:0;font-size:var(--text-xs)}@media(max-width:720px){.missed-score{display:none}.missed-body{padding-left:12px}}.assign-layout{display:grid;gap:var(--space-4);grid-template-columns:minmax(0,420px) minmax(0,1fr);align-items:start}@media(max-width:1000px){.assign-layout{grid-template-columns:minmax(0,1fr)}}.assign-form{position:sticky;top:var(--space-4)}@media(max-width:1000px){.assign-form{position:static}}.kind-picker{display:grid;gap:8px}.kind-option{display:grid;grid-template-columns:auto 1fr;column-gap:10px;row-gap:2px;align-items:center;text-align:left;padding:10px 12px;border-radius:var(--radius-md);border:1.5px solid var(--line);background:var(--bg-elevated);color:var(--text);font:inherit;cursor:pointer;transition:border-color var(--fast) var(--ease),background-color var(--fast) var(--ease),transform var(--fast) var(--ease)}.kind-option svg{grid-row:span 2;color:var(--text-3);transition:color var(--fast) var(--ease)}.kind-option strong{font-size:var(--text-sm)}.kind-option small{font-size:var(--text-xs);color:var(--text-3)}.kind-option:hover{border-color:var(--line-strong)}.kind-option:active{transform:scale(.99)}.kind-option[aria-checked=true]{border-color:var(--accent);background:var(--accent-soft)}.kind-option[aria-checked=true] svg{color:var(--accent)}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.field{display:grid;gap:6px;font-size:var(--text-sm);font-weight:650;color:var(--text-2)}.field-wide{grid-column:1 / -1}.assign-card{display:grid;gap:12px;animation:rise var(--slow) var(--ease) backwards;animation-delay:calc(var(--i, 0) * 60ms);transition:border-color var(--normal) var(--ease),box-shadow var(--normal) var(--ease)}.assign-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow-md)}.assign-card-head{display:flex;gap:12px;align-items:flex-start;flex-wrap:wrap}.assign-card-head h3{margin:0;font-size:var(--text-md)}.assign-card-head p{margin:2px 0 0;font-size:var(--text-xs)}.assign-note{margin:0;padding:10px 12px;border-radius:var(--radius-md);background:var(--surface-2);font-size:var(--text-sm);color:var(--text-2)}.assign-progress{display:grid;gap:8px}.assign-pct{margin-left:auto;font-size:var(--text-lg);font-weight:800;color:var(--text)}.assign-students{list-style:none;margin:0;padding:0;display:grid;gap:6px;animation:rise var(--normal) var(--ease) backwards}.assign-students li{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr) 48px;gap:10px;align-items:center;font-size:var(--text-sm)}.assign-students .num{text-align:right;color:var(--success)}.course-topics{list-style:none;margin:0;padding:0;display:grid}.course-topics li{display:flex;align-items:center;gap:12px;padding:10px 0;border-top:1px solid var(--line);animation:rise var(--slow) var(--ease) backwards;animation-delay:calc(var(--i, 0) * 40ms)}.course-topics li:first-child{border-top:0}.course-topics .grow{display:grid;gap:2px;min-width:0}.course-topics strong{font-size:var(--text-sm)}.course-topics small{font-size:var(--text-xs)}.course-topics .topic-meter{width:160px;flex:none}.course-topic-week{display:inline-grid;place-items:center;width:38px;height:30px;border-radius:9px;background:var(--accent-soft);color:var(--accent);font-weight:800;font-size:var(--text-xs);flex:none}.tool-list{list-style:none;margin:0;padding:0;display:grid;gap:4px}@media(max-width:720px){.course-topics .topic-meter{width:110px}}.student-tasks{display:grid;gap:10px;margin-bottom:var(--space-5);animation:rise var(--slow) var(--ease) backwards}.student-task{display:grid;gap:8px;padding:14px 16px;border-radius:var(--radius-lg);border:1px solid color-mix(in srgb,var(--info) 35%,var(--line));background:linear-gradient(135deg,var(--info-soft),transparent 70%),var(--surface)}.student-task-head{display:flex;gap:10px;align-items:center}.student-task-head strong{font-size:var(--text-sm)}.student-task-head small{display:block;color:var(--text-3);font-size:var(--text-xs)}.student-task p{margin:0;font-size:var(--text-sm);color:var(--text-2)}.student-task.is-done{border-color:color-mix(in srgb,var(--success) 40%,var(--line));background:linear-gradient(135deg,var(--success-soft),transparent 70%),var(--surface)}@keyframes grow-up{0%{transform:scaleY(0)}to{transform:scaleY(1)}}@keyframes grow-right{0%{transform:scaleX(0)}to{transform:scaleX(1)}}@keyframes tip-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}@keyframes pop-in{0%{opacity:0;transform:scale(.6)}to{opacity:1;transform:none}}.spin{animation:spin .9s linear infinite}@media(prefers-reduced-motion:reduce){.teach *,.kpi,.dash-card,.colchart-bar,.meter>span,.calendar-day,.roster-row,.answer-list li,.missed,.assign-card,.course-topics li{animation:none!important}}.insights-meta{margin:-4px 0 var(--space-2);font-size:var(--text-xs)}.insights-funnel{margin-bottom:var(--space-2)}.insights-funnel .funnel-step{animation:rise var(--slow) var(--ease) backwards;animation-delay:calc(var(--i, 0) * 60ms + .12s)}.insights-funnel .funnel-bar{border-radius:var(--radius-md);transform-origin:left;animation:grow-right .9s var(--ease) backwards;animation-delay:.2s}.insights-courses{grid-template-columns:repeat(auto-fill,minmax(min(100%,380px),1fr))}.insight-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.insight-stats>div{display:grid;gap:2px;padding:10px 12px;border-radius:var(--radius-md);background:var(--surface-2)}.insight-stats strong{font-size:var(--text-lg);font-weight:780}.insight-stats strong small{font-size:var(--text-sm);color:var(--text-3);font-weight:600}.insight-stats span:last-child{font-size:var(--text-xs);color:var(--text-3)}.insight-stats .chip{justify-self:start}.insight-card .notice p strong{display:inline-flex;align-items:center;gap:4px}@keyframes sparkle{0%,to{opacity:.4;transform:scale(.85)}50%{opacity:1;transform:scale(1.1)}}.coach{display:flex;align-items:flex-end;gap:10px;margin-bottom:6px;animation:coach-in .42s var(--ease) backwards}.coach-bubble{position:relative;margin:0 0 8px;padding:8px 12px;border-radius:14px 14px 14px 4px;background:var(--bg-elevated);border:1px solid var(--line-strong);color:var(--text);font-weight:750;font-size:var(--text-sm);line-height:1.3;box-shadow:var(--shadow-sm)}.coach-cheer .coach-bubble{border-color:color-mix(in srgb,var(--spark) 60%,var(--line))}.coach-think .coach-bubble{font-weight:650}@keyframes coach-in{0%{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:none}}.compete-hero{display:flex;align-items:center;gap:16px;margin-bottom:var(--space-5)}.compete-hero h1{margin:0;font-size:clamp(1.5rem,4vw,2rem)}.compete-hero p{margin:2px 0 0}.leaderboard-me{margin:0}.compete>.stack{margin-bottom:var(--space-4)}.compete-privacy{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:0;font-size:var(--text-xs)}.leaderboard-card{display:grid;gap:var(--space-3)}.segmented{display:inline-flex;padding:3px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line)}.segmented button{min-height:32px;padding:0 14px;border:0;border-radius:999px;background:none;color:var(--text-2);font:650 var(--text-sm)/1 var(--font-sans);cursor:pointer;transition:background-color var(--fast) var(--ease),color var(--fast) var(--ease)}.segmented button[aria-selected=true]{background:var(--bg-elevated);color:var(--text);box-shadow:var(--shadow-sm)}.challenge-card{display:grid;gap:12px;padding:18px;border-radius:var(--radius-lg);border:1px solid var(--line);background:radial-gradient(90% 70% at 100% 0%,color-mix(in srgb,var(--spark) 12%,transparent),transparent 70%),var(--surface);box-shadow:var(--shadow-sm);animation:rise var(--slow) var(--ease) backwards;animation-delay:calc(var(--i, 0) * 70ms)}.challenge-card.is-live{border-color:color-mix(in srgb,var(--spark) 45%,var(--line))}.challenge-card.is-ended{background:var(--surface)}.challenge-head{display:flex;gap:12px;align-items:flex-start}.challenge-head h3{margin:6px 0 2px;font-size:var(--text-lg);letter-spacing:-.01em}.challenge-icon{display:inline-grid;place-items:center;flex:none;width:40px;height:40px;border-radius:12px;background:color-mix(in srgb,var(--spark) 18%,transparent);color:var(--spark)}.challenge-chips{display:flex;flex-wrap:wrap;gap:6px}.challenge-chips .chip{display:inline-flex;align-items:center;gap:5px}.live-dot{width:7px;height:7px;border-radius:50%;background:currentColor;animation:pulse-dot 1.6s ease-in-out infinite}.challenge-time{display:flex;align-items:center;gap:4px;margin:0;font-size:var(--text-xs)}.challenge-desc{margin:0;font-size:var(--text-sm);color:var(--text-2)}.challenge-reward{display:flex;align-items:center;gap:6px;margin:0;padding:8px 12px;border-radius:var(--radius-md);background:color-mix(in srgb,var(--spark) 12%,transparent);color:var(--text);font-size:var(--text-sm);font-weight:650}.challenge-reward svg{color:var(--spark);flex:none}.challenge-me{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;padding:10px 12px;border-radius:var(--radius-md);background:var(--accent-soft);font-size:var(--text-sm);color:var(--text-2)}.challenge-me strong{color:var(--accent);font-size:var(--text-lg)}.podium{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;align-items:end;padding-top:14px}.podium-step{display:grid;justify-items:center;gap:4px;min-width:0;animation:podium-rise .7s var(--ease) backwards;animation-delay:calc(var(--i, 0) * .12s + .12s)}.podium-avatar{position:relative;display:grid;place-items:center;width:42px;height:42px;border-radius:50%;font-weight:800;color:var(--on-accent);background:linear-gradient(135deg,var(--accent),var(--info));box-shadow:0 0 0 3px var(--surface)}.podium-1 .podium-avatar{width:52px;height:52px;background:linear-gradient(135deg,#ffd27a,var(--spark));color:#3a2400}.podium-3 .podium-avatar{background:linear-gradient(135deg,#e3a874,#b8743c);color:#2d1700}.podium-crown{position:absolute;top:-13px;color:var(--spark);fill:var(--spark)}.podium-name{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:var(--text-sm)}.podium-score{font-size:var(--text-xs);color:var(--text-3);font-variant-numeric:tabular-nums}.podium-block{width:100%;display:grid;place-items:start center;padding-top:6px;border-radius:10px 10px 4px 4px;background:var(--surface-2);color:var(--text-3);font-weight:850}.podium-1 .podium-block{height:64px;background:color-mix(in srgb,var(--spark) 22%,var(--surface-2));color:var(--spark)}.podium-2 .podium-block{height:46px}.podium-3 .podium-block{height:34px}.podium-step.is-me .podium-name{color:var(--accent)}@keyframes podium-rise{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}.rank-list{list-style:none;margin:0;padding:0;display:grid;gap:4px}.rank-row{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-md);animation:rise var(--slow) var(--ease) backwards;animation-delay:calc(var(--i, 0) * 30ms + .2s)}.rank-row:has(>.rank-button){padding:0}.rank-button{width:100%;display:flex;align-items:center;gap:10px;padding:8px 10px;border:0;background:none;color:inherit;font:inherit;text-align:left;cursor:pointer;border-radius:inherit;transition:background-color var(--fast) var(--ease)}.rank-button:hover{background:var(--surface-2)}.rank-row.is-me{background:var(--accent-soft);outline:1px solid color-mix(in srgb,var(--accent) 35%,transparent)}.rank-number{width:26px;text-align:center;font-weight:800;color:var(--text-3);font-variant-numeric:tabular-nums;flex:none}.rank-avatar{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;flex:none;background:var(--surface-3);font-weight:750;font-size:var(--text-xs)}.rank-name{min-width:0;font-size:var(--text-sm);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.rank-name small{color:var(--text-3)}.rank-score{font-size:var(--text-sm);font-weight:750;font-variant-numeric:tabular-nums;flex:none}.preset-row{display:flex;flex-wrap:wrap;gap:6px}@media(prefers-reduced-motion:reduce){.coach,.podium-step,.rank-row,.challenge-card{animation:none!important}}:root{--spring: cubic-bezier(.2, .9, .25, 1.15)}.tab-pane:not([hidden]){animation:page-in .32s var(--ease) backwards}.page>:nth-child(1){animation:rise .42s var(--ease) backwards}.page>:nth-child(2){animation:rise .42s var(--ease) 50ms backwards}.page>:nth-child(3){animation:rise .42s var(--ease) .1s backwards}.page>:nth-child(4){animation:rise .42s var(--ease) .15s backwards}.page>:nth-child(5){animation:rise .42s var(--ease) .2s backwards}.page>:nth-child(6){animation:rise .42s var(--ease) .25s backwards}.page>:nth-child(n+7){animation:rise .42s var(--ease) .3s backwards}.card{transition:border-color var(--normal) var(--ease),box-shadow var(--normal) var(--ease),transform var(--normal) var(--ease),background-color var(--normal) var(--ease)}a.card:hover,.card-interactive:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.list-item{transition:background-color var(--fast) var(--ease)}.btn{transition:transform .16s var(--spring),background-color var(--fast) var(--ease),border-color var(--fast) var(--ease),box-shadow var(--normal) var(--ease),opacity var(--fast) var(--ease)}@media(hover:hover){.btn:hover:not(:disabled){transform:translateY(-1px)}.btn-primary:hover:not(:disabled){box-shadow:0 8px 22px -8px color-mix(in srgb,var(--accent) 70%,transparent)}}.btn:active:not(:disabled){transform:translateY(0) scale(.97);transition-duration:80ms}.btn-primary{position:relative;overflow:hidden;isolation:isolate}.btn-primary:after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:linear-gradient(110deg,transparent 30%,rgb(255 255 255 / .28) 50%,transparent 70%);transform:translate(-120%)}@media(hover:hover){.btn-primary:hover:not(:disabled):after{animation:sheen .9s var(--ease)}}.rail-item{position:relative}.rail-item:before{content:"";position:absolute;left:-16px;top:50%;width:4px;height:0;border-radius:0 4px 4px 0;background:var(--accent);translate:0 -50%;transition:height var(--normal) var(--spring)}.rail-item[aria-current=page]:before{height:60%}.rail-item svg,.tab svg{transition:transform .26s var(--spring),color var(--fast) var(--ease)}.rail-item:hover svg{transform:translate(2px)}.tab[aria-current=page] svg{animation:tab-bounce .42s var(--spring)}.tab:active svg{transform:scale(.88)}.option{transition:border-color var(--fast) var(--ease),background-color var(--fast) var(--ease),transform .16s var(--spring),box-shadow var(--normal) var(--ease)}.option:active:not(:disabled){transform:scale(.985)}.option[aria-pressed=true]{animation:choose .26s var(--spring)}.option.is-correct{animation:correct-glow .9s var(--ease)}.option.is-wrong{animation:shake .38s var(--ease)}.result{animation:result-in .42s var(--spring) backwards}.result-correct strong{display:inline-block}.result-sparks{display:inline-block;animation:xp-pop .7s var(--spring) .12s backwards}.progress>span,.progress-fill,.level-bar span,.badge-progress span{transition:width .7s var(--ease)}.stat{animation:rise .42s var(--ease) backwards}.stats>:nth-child(2){animation-delay:50ms}.stats>:nth-child(3){animation-delay:.1s}.stats>:nth-child(4){animation-delay:.15s}.stats>:nth-child(n+5){animation-delay:.2s}.auth-card{animation:card-in .52s var(--spring) backwards}.onboarding-step{animation:step-in .38s var(--ease) backwards}.chip{transition:background-color var(--fast) var(--ease),color var(--fast) var(--ease)}input,select,textarea{transition:border-color var(--fast) var(--ease),box-shadow var(--normal) var(--ease),background-color var(--fast) var(--ease)}html.theme-switching,html.theme-switching *{transition:background-color .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease)!important}.lp-hero-copy>*{animation:rise .64s var(--ease) backwards}.lp-hero-copy>:nth-child(2){animation-delay:80ms}.lp-hero-copy>:nth-child(3){animation-delay:.16s}.lp-hero-copy>:nth-child(4){animation-delay:.24s}.lp-hero-copy>:nth-child(5){animation-delay:.32s}.lp-hero-visual{animation:phone-in .9s var(--spring) .2s backwards}.lp-hero-visual .iphone{animation:phone-float 6s ease-in-out 1.2s infinite}.lp-gradient{background-size:200% 100%;animation:gradient-drift 8s ease-in-out infinite alternate}.lp-badge-dot{animation:pulse-dot 2.4s ease-in-out infinite}.reveal-ready .reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}.reveal-ready .reveal.is-visible{opacity:1;transform:none}.reveal-ready .reveal-stagger>*{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease),border-color var(--normal) var(--ease),box-shadow var(--normal) var(--ease)}.reveal-ready .reveal-stagger.is-visible>*{opacity:1;transform:none}.reveal-ready .reveal-stagger.is-visible>:nth-child(2){transition-delay:90ms}.reveal-ready .reveal-stagger.is-visible>:nth-child(3){transition-delay:.18s}.reveal-ready .reveal-stagger.is-visible>:nth-child(4){transition-delay:.27s}.reveal-ready .reveal-stagger.is-visible>:nth-child(n+5){transition-delay:.36s}.lp-pillar,.lp-steps li,.lp-science-item,.lp-faq details{transition:transform var(--normal) var(--ease),border-color var(--normal) var(--ease),box-shadow var(--normal) var(--ease)}@media(hover:hover){.lp-steps li:hover,.lp-science-item:hover{transform:translateY(-3px)}.lp-pillar:hover{border-color:var(--line-strong);box-shadow:var(--shadow-md)}}.lp-faq details[open] p{animation:rise .32s var(--ease) backwards}.lp-faq summary{transition:color var(--fast) var(--ease)}@keyframes page-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@keyframes sheen{to{transform:translate(120%)}}@keyframes tab-bounce{0%{transform:scale(1)}40%{transform:scale(1.18) translateY(-2px)}to{transform:scale(1)}}@keyframes choose{0%{transform:scale(1)}45%{transform:scale(1.015)}to{transform:scale(1)}}@keyframes correct-glow{0%{box-shadow:0 0 color-mix(in srgb,var(--success) 55%,transparent)}to{box-shadow:0 0 0 12px transparent}}@keyframes result-in{0%{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:none}}@keyframes xp-pop{0%{opacity:0;transform:translateY(6px) scale(.7)}60%{opacity:1;transform:translateY(-2px) scale(1.12)}to{transform:none}}@keyframes card-in{0%{opacity:0;transform:translateY(16px) scale(.98)}to{opacity:1;transform:none}}@keyframes step-in{0%{opacity:0;transform:translate(18px)}to{opacity:1;transform:none}}@keyframes phone-in{0%{opacity:0;transform:translateY(40px) rotate(2deg) scale(.96)}to{opacity:1;transform:none}}@keyframes phone-float{0%,to{transform:translateY(0) rotate(0)}50%{transform:translateY(-10px) rotate(-.4deg)}}@keyframes gradient-drift{0%{background-position:0% 50%}to{background-position:100% 50%}}@keyframes pulse-dot{0%,to{box-shadow:0 0 0 4px var(--accent-soft)}50%{box-shadow:0 0 0 8px transparent}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:1ms!important;animation-iteration-count:1!important;animation-delay:0ms!important;transition-duration:1ms!important;scroll-behavior:auto!important}.reveal-ready .reveal,.reveal-ready .reveal-stagger>*{opacity:1;transform:none}}.ec-canvas{margin:12px 0}.ec-canvas>svg,.ec-canvas details>svg,.ec-joint{display:block;width:100%;background:#f9fbf8;border:1px solid #c4d3cc;border-radius:12px;color:#204b41}.ec-canvas svg text,.ec-joint text{fill:#24463c;font:14px Arial,sans-serif}.ec-canvas svg path,.ec-canvas svg circle{fill:none}.ec-canvas svg marker path{fill:currentColor;stroke:none}.ec-beam{stroke:#254b40;stroke-width:6}.ec-support{stroke:#365f52;stroke-width:1.6}.ec-arm,.ec-dimension,.ec-axis{stroke:#718b80;stroke-width:1}.ec-emphasis{stroke:#875700;stroke-width:3}.ec-load{stroke:#a43f1b;color:#a43f1b;stroke-width:2.4}.ec-load text{stroke:none}.ec-reaction{stroke:#246650;color:#246650;stroke-width:2}.ec-reaction text{stroke:none}.ec-reaction-leader{stroke-width:1;stroke-dasharray:2 3}.ec-canvas .ec-drag{stroke:#176a53;stroke-width:2;fill:#bce9d9;fill-opacity:.6;cursor:grab;touch-action:none}.ec-drag:focus-visible{stroke:#1b4ba0;stroke-width:4;outline:none}.ec-shear{stroke:#215e95;stroke-width:2.6}.ec-moment{stroke:#8e510a;stroke-width:2.6}.ec-cause{font-size:14px;font-variant-numeric:tabular-nums}.ec-canvas details{margin-top:12px}.ec-canvas details p{font-size:14px}.ec-canvas .katex-display{overflow-x:auto}.ec-terms{display:grid;gap:6px;padding-left:22px}.ec-joint line{stroke:#315c51;stroke-width:2}.ec-joint text{font-size:12px}.m2d-svg .ec-tension{stroke:#215e95;stroke-width:3}.m2d-svg .ec-compression{stroke:#975108;stroke-width:3;stroke-dasharray:7 3}.m2d-svg .ec-zero{stroke:#69716d;stroke-width:2;stroke-dasharray:2 4}.lp{background:var(--bg);color:var(--text);overflow-x:clip}.lp-container{width:100%;max-width:1160px;margin:0 auto;padding:0 20px}.lp-narrow{max-width:780px}.lp a:hover{text-decoration:none}.landing-nav{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);max-width:var(--wide-width);margin:0 auto;padding:var(--space-4)}.lp-nav{position:sticky;top:0;z-index:30;padding-top:env(safe-area-inset-top);border-bottom:1px solid transparent;transition:background-color var(--normal) var(--ease),border-color var(--normal) var(--ease)}.lp-nav.is-scrolled{background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:saturate(160%) blur(16px);-webkit-backdrop-filter:saturate(160%) blur(16px);border-bottom-color:var(--line)}.lp-nav-inner{display:flex;align-items:center;gap:var(--space-5);height:64px}.lp-brand{color:var(--text);display:inline-flex;align-items:center;min-height:44px}.lp .wordmark{gap:8px}.lp .logo{filter:none}.lp-links{display:none;gap:var(--space-5);margin-left:var(--space-4)}.lp-links a{color:var(--text-2);font-weight:600;font-size:var(--text-sm)}.lp-links a:hover{color:var(--text)}.lp-actions{margin-left:auto;display:flex;align-items:center;gap:4px}.lp-menu-toggle,.lp-mobile-menu,.lp-mobile-menu[hidden]{display:none}@media(min-width:860px){.lp-links{display:flex}}@media(max-width:380px){.lp-signin{display:none}}@media(max-width:859px){.lp-nav{background:var(--bg)}.lp-nav-inner{gap:8px}.lp-actions .lp-signin,.lp-nav-access{display:none}.lp-menu-toggle{display:inline-flex;min-height:44px}.lp-actions .icon-btn{min-width:44px;min-height:44px}.lp-mobile-menu{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;padding-block:8px 16px;border-bottom:1px solid var(--line)}.lp-mobile-menu a{display:flex;align-items:center;min-height:44px;padding:10px 12px;color:var(--text);font-weight:650}.lp-mobile-menu .btn-primary{color:var(--on-accent)}}.lp-hero{position:relative;padding:48px 0 72px}.lp-hero:before{content:"";position:absolute;inset:-64px 0 0;background:radial-gradient(50% 45% at 78% 25%,color-mix(in srgb,var(--accent) 20%,transparent),transparent 70%),radial-gradient(40% 40% at 10% 80%,color-mix(in srgb,var(--info) 16%,transparent),transparent 70%),linear-gradient(transparent 70%,var(--bg));pointer-events:none}.lp-hero:after{content:"";position:absolute;inset:-64px 0 0;background-image:linear-gradient(color-mix(in srgb,var(--text) 5%,transparent) 1px,transparent 1px),linear-gradient(90deg,color-mix(in srgb,var(--text) 5%,transparent) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(70% 60% at 50% 30%,#000 30%,transparent 75%);-webkit-mask-image:radial-gradient(70% 60% at 50% 30%,#000 30%,transparent 75%);pointer-events:none}.lp-hero-grid{position:relative;z-index:1;display:grid;gap:56px;align-items:center}@media(min-width:980px){.lp-hero{padding:72px 0 96px}.lp-hero-grid{grid-template-columns:1.15fr .85fr}}.lp-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--radius-pill);border:1px solid var(--line);background:color-mix(in srgb,var(--surface) 80%,transparent);color:var(--text-2);font-size:var(--text-sm);font-weight:650;margin-bottom:var(--space-5)}.lp-badge-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}.lp-hero h1{font-size:clamp(2.6rem,6.4vw,4.6rem);line-height:1.02;letter-spacing:-.04em;font-weight:830;margin:0 0 var(--space-5)}.lp-lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--text-2);max-width:34em;margin-bottom:var(--space-6)}.lp-cta{display:flex;flex-wrap:wrap;gap:var(--space-3)}.lp-trust{list-style:none;padding:0;margin:var(--space-6) 0 0;display:flex;flex-wrap:wrap;gap:10px 22px;color:var(--text-2);font-size:var(--text-sm)}.lp-trust li{display:inline-flex;align-items:center;gap:6px}.lp-trust svg{color:var(--accent)}.lp-hero-visual{position:relative;justify-self:center;width:min(100%,340px);container-type:inline-size}.lp-hero-visual:before{content:"";position:absolute;inset:10% -22% 2%;background:radial-gradient(closest-side,color-mix(in srgb,var(--accent) 30%,transparent),transparent);filter:blur(30px);opacity:.8;pointer-events:none}.iphone{position:relative;aspect-ratio:71.5 / 149.6;border:1.6cqw solid transparent;border-radius:16cqw;padding:2.3cqw;background:linear-gradient(#050506,#050506) padding-box,linear-gradient(140deg,#ebe7e0,#928d86 16%,#d6d1c9 34%,#7a766f 55%,#c2bdb5 78%,#6e6a64) border-box;box-shadow:inset 0 0 0 .35cqw #1b1b1d,0 2px #00000040,0 46px 90px -28px #0009,0 22px 40px -22px #00000073}.iphone-btn{position:absolute;width:1cqw;background:linear-gradient(90deg,#6f6b65,#d2cdc5 45%,#8b867f);pointer-events:none}.iphone-btn-action,.iphone-btn-vol-up,.iphone-btn-vol-down{left:-2.6cqw;border-radius:.7cqw 0 0 .7cqw}.iphone-btn-side,.iphone-btn-camera{right:-2.6cqw;border-radius:0 .7cqw .7cqw 0;background:linear-gradient(270deg,#6f6b65,#d2cdc5 45%,#8b867f)}.iphone-btn-action{top:18%;height:4.6%}.iphone-btn-vol-up{top:26.5%;height:7.6%}.iphone-btn-vol-down{top:36%;height:7.6%}.iphone-btn-side{top:29%;height:11.5%}.iphone-btn-camera{top:56%;height:6.2%;width:.7cqw;right:-2.3cqw;background:linear-gradient(270deg,#2c2b29,#57544f)}.iphone-display{position:relative;height:100%;border-radius:12.1cqw;background:var(--bg);overflow:hidden;display:flex;flex-direction:column;isolation:isolate}.iphone-display:after{content:"";position:absolute;inset:0;background:linear-gradient(118deg,rgb(255 255 255 / .07),transparent 32%);pointer-events:none;z-index:3}.iphone-statusbar{flex:none;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:14.5cqw;padding-inline:3cqw;color:var(--text);font:600 4.4cqw/1 -apple-system,BlinkMacSystemFont,"SF Pro Text",var(--font-body, system-ui),sans-serif;letter-spacing:-.01em;font-variant-numeric:tabular-nums}.iphone-time{justify-self:center;padding-left:2cqw}.iphone-island{width:31cqw;height:9.2cqw;border-radius:999px;background:#000;box-shadow:inset 0 0 0 .3cqw #111}.iphone-status-icons{justify-self:center;display:inline-flex;align-items:center;gap:1.3cqw;padding-right:1cqw}.iphone-status-icons svg{width:auto;height:3.3cqw;fill:currentColor}.iphone-status-icons svg:last-child{height:3.6cqw}.iphone-screen{flex:1;min-height:0;display:flex;flex-direction:column}.demo-app{flex:1;min-height:0;display:flex;flex-direction:column;text-align:left}.demo-app .feed-header{padding:2px 3.6cqw 2.4cqw;border-bottom-color:var(--line)}.demo-app .feed-course{min-height:0;padding:0}.demo-app .feed-course-label{font-size:5.6cqw}.demo-app .feed-course-name{font-size:3.2cqw;max-width:none}.demo-app .feed-hud{gap:1.4cqw}.demo-app .streak-chip,.demo-app .spark-count{padding:1.2cqw 2.2cqw;font-size:3.4cqw}.demo-app .spark-count.pulse{animation:pop .5s var(--ease)}.demo-feed-body{flex:1;min-height:0;overflow-y:auto;padding:3.4cqw 3.8cqw 3cqw;scrollbar-width:none}.demo-feed-body::-webkit-scrollbar{display:none}.demo-app .feed-card-inner{gap:2.8cqw;max-width:none}.demo-app .feed-card-meta .chip{font-size:3.1cqw}.demo-app .feed-task{font-size:4.9cqw;line-height:1.3}.demo-app .feed-actions .btn{min-height:12.4cqw;font-size:4.2cqw}.demo-app .feed-footer{font-size:3.4cqw}.demo-app .feed-footer .subtle-link{font-size:inherit}.demo-app .result{padding:3cqw 3.6cqw;font-size:3.6cqw}.demo-app .result p{margin:1cqw 0 0}.demo-hint p{margin:0;display:flex;gap:6px;align-items:center;font-size:3.5cqw}.demo-tabbar{flex:none;display:grid;grid-template-columns:repeat(5,1fr);padding:1.6cqw 0 7.6cqw;border-top:1px solid var(--line);background:color-mix(in srgb,var(--bg-elevated) 88%,transparent)}.demo-tabbar .tab{font-size:2.8cqw;gap:.8cqw}.demo-tabbar .tab svg{width:5.6cqw;height:5.6cqw}.iphone-home{position:absolute;z-index:4;bottom:2.2cqw;left:50%;translate:-50% 0;width:36cqw;height:1.45cqw;border-radius:999px;background:var(--text);opacity:.9;pointer-events:none}.demo-card{display:grid;gap:var(--space-3)}.demo-card-meta{display:flex;gap:6px;flex-wrap:wrap}.demo-task{font-size:1.15rem;line-height:1.3;margin:0}.demo-visual .ec-canvas{background:var(--paper);color:var(--paper-ink);border-radius:var(--radius-md);padding:var(--space-2)}.demo-visual .ec-canvas details,.demo-visual .ec-canvas summary,.demo-visual .ec-canvas p,.demo-visual .ec-canvas .p-link,.demo-visual .ec-canvas .p-field{color:var(--paper-ink)}.demo-visual input[type=range]{width:100%;accent-color:#0a9f6c}.lp-section{padding:88px 0}.lp-section-head{max-width:760px;margin:0 auto 48px;text-align:center}.lp-section h2{font-size:clamp(2rem,4.2vw,3rem);line-height:1.08;letter-spacing:-.03em;font-weight:800;margin-bottom:var(--space-4)}.lp-section-lead{font-size:var(--text-lg);color:var(--text-2);margin:0}.lp-problem{text-align:center;padding-bottom:24px}.lp-problem em{color:var(--text);font-style:normal;font-weight:700}.lp-pillars{display:grid;gap:40px}.lp-pillar{display:grid;gap:32px;align-items:center;padding:32px;border-radius:32px;background:var(--surface);border:1px solid var(--line)}@media(min-width:900px){.lp-pillar{grid-template-columns:1fr 1fr;padding:48px;gap:56px}.lp-pillar.is-reversed .lp-pillar-copy{order:2}}.lp-pillar h3{font-size:clamp(1.5rem,2.6vw,2rem);line-height:1.15;letter-spacing:-.02em}.lp-pillar-icon{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:14px;background:var(--accent-soft);color:var(--accent);margin-bottom:var(--space-4)}.lp-pillar ul{list-style:none;padding:0;margin:var(--space-5) 0 0;display:grid;gap:10px}.lp-pillar li{display:flex;gap:10px;align-items:flex-start;color:var(--text-2)}.lp-pillar li svg{flex:none;margin-top:3px;color:var(--accent)}.lp-pillar-visual{display:grid;place-items:center;min-height:300px;border-radius:24px;background:radial-gradient(60% 60% at 50% 40%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 75%),var(--bg);border:1px solid var(--line);padding:28px}.mock{width:min(100%,330px);display:grid;gap:12px;padding:20px;border-radius:22px;background:var(--bg-elevated);border:1px solid var(--line);box-shadow:var(--shadow-md);font-size:var(--text-sm)}.mock-chiprow{display:flex;gap:6px;flex-wrap:wrap}.mock-title{font-weight:800;font-size:var(--text-lg);line-height:1.25}.mock-feed{width:min(100%,460px);min-width:0}.mock-truss-figure{margin:0;min-width:0}.mock-truss-figure figcaption{margin-top:8px;color:var(--text-2);font-size:var(--text-xs);line-height:1.5}.mock-truss{border-radius:14px;background:var(--paper);color:var(--paper-ink);padding:12px 4px;overflow-x:auto}.mock-truss svg{display:block;width:100%;height:auto;fill:none}.mock-truss.is-enlarged svg{min-width:720px}.mock-truss .truss-members{stroke:#25333f;stroke-width:2.5}.mock-truss .truss-members .is-zero{stroke:#087858;stroke-width:5}.mock-truss .truss-joints{fill:#fff;stroke:#25333f;stroke-width:1.7}.mock-truss .truss-supports{stroke:#25333f;stroke-width:1.7}.mock-truss .truss-dimensions{stroke:#70808c;stroke-width:1}.mock-truss text{fill:#25333f;stroke:none;font:22px var(--font-body, sans-serif)}.mock-truss .truss-dimensions text{font-size:19px}.mock-truss .truss-node-labels{font-weight:600}.mock-truss .truss-loads{stroke:#ac3e26;stroke-width:2.5}.mock-truss .truss-loads text{fill:#ac3e26}.mock-truss-zoom{justify-self:start;border:0;padding:6px 0;background:none;color:var(--accent);font:inherit;text-decoration:underline;cursor:pointer;min-height:44px}.mock-explanation{margin:0;color:var(--text-2);line-height:1.5}.mock-option{display:flex;gap:10px;align-items:center;padding:10px 12px;border-radius:12px;border:1.5px solid var(--success);background:var(--success-soft)}.mock-option span{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:7px;background:var(--accent);color:var(--on-accent);font-weight:800;font-size:var(--text-xs)}.mock-result{font-weight:800;color:var(--success)}.mock-result b{color:var(--spark);margin-left:6px}.mock-topic{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;border:1px solid var(--line);background:var(--surface)}.mock-node{display:inline-grid;place-items:center;flex:none;width:24px;height:24px;border-radius:50%;border:2px solid var(--line-strong);font-weight:800;font-size:11px;color:var(--text-2)}.mock-topic.level-3 .mock-node{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}.mock-topic-title{flex:1;font-weight:650}.mock-bars{display:inline-flex;gap:3px}.mock-bars i{display:block;width:12px;height:5px;border-radius:3px;background:var(--surface-3)}.level-1 .mock-bars i:nth-child(1),.mock-bars.level-1 i:nth-child(1){background:var(--info)}.level-2 .mock-bars i:nth-child(-n+2),.mock-bars.level-2 i:nth-child(-n+2){background:var(--accent);opacity:.7}.level-3 .mock-bars i{background:var(--accent)}.mock-boss{border-color:color-mix(in srgb,var(--spark) 45%,var(--line))}.mock-boss .mock-node{border-color:var(--spark);color:var(--spark)}.mock-countdown{display:flex;align-items:center;flex-wrap:wrap;gap:6px}.mock-countdown svg{color:var(--accent)}.mock-countdown span{padding:2px 8px;border-radius:var(--radius-pill);background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:var(--text-xs)}.mock-ring{justify-self:center;display:grid;place-items:center;width:120px;height:120px;border-radius:50%;background:conic-gradient(var(--accent) 64%,var(--surface-3) 0)}.mock-ring span{display:grid;place-items:center;width:96px;height:96px;border-radius:50%;background:var(--bg-elevated);font-weight:850;font-size:1.5rem}.mock-drill{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-radius:12px;border:1px solid var(--line);background:var(--surface);font-weight:650}.lp-engine{background:radial-gradient(50% 40% at 50% 0%,color-mix(in srgb,var(--info) 12%,transparent),transparent 70%),var(--bg-elevated);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.lp-engine #tm-jumo-flow{box-shadow:var(--shadow-lg)}.lp-engine #tm-jumo-flow .lab-body>h3,.lp-engine #tm-jumo-flow .lab-body>.intro{display:none}.lp-engine-placeholder{display:grid;place-items:center;min-height:420px;border-radius:var(--radius-xl);border:1px solid var(--line);color:var(--text-3)}.jet-failed{padding:var(--space-4) var(--space-5);color:var(--text-2)}.lp-steps{list-style:none;padding:0;margin:0;display:grid;gap:var(--space-4)}@media(min-width:860px){.lp-steps{grid-template-columns:repeat(3,1fr)}}.lp-steps li{padding:28px;border-radius:24px;border:1px solid var(--line);background:var(--surface)}.lp-steps li>span{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--accent);color:var(--on-accent);font-weight:850;margin-bottom:var(--space-4)}.lp-steps h3{font-size:var(--text-xl)}.lp-steps p{margin:0}.lp-science{padding-top:24px}.lp-science-grid{display:grid;gap:1px;grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));border-radius:24px;overflow:hidden;border:1px solid var(--line);background:var(--line)}.lp-science-item{padding:28px;background:var(--surface)}.lp-science-item h3{font-size:var(--text-lg)}.lp-science-item p{margin:0}.lp-lecturers{display:grid;gap:40px;align-items:center;padding:40px;border-radius:32px;background:radial-gradient(60% 80% at 100% 0%,color-mix(in srgb,var(--accent) 16%,transparent),transparent 70%),var(--surface);border:1px solid var(--line)}@media(min-width:900px){.lp-lecturers{grid-template-columns:1.1fr .9fr;padding:56px}}.lp-lecturers ul{list-style:none;padding:0;margin:var(--space-5) 0 var(--space-6);display:grid;gap:12px}.lp-lecturers li{display:flex;gap:12px;align-items:center;color:var(--text-2)}.lp-lecturers li svg{color:var(--accent)}.lp-lecturers-visual{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:12px}.lp-example{position:absolute;top:-28px;right:0;font-size:var(--text-xs);color:var(--text-3);font-weight:650}.lp-insight{padding:20px;border-radius:18px;background:var(--bg-elevated);border:1px solid var(--line);box-shadow:var(--shadow-sm)}.lp-insight span{display:block;font-size:var(--text-xs);color:var(--text-3);margin-bottom:4px}.lp-insight b{font-size:var(--text-2xl);font-weight:820}.lp-insight.is-wide{grid-column:1 / -1}.lp-insight.is-wide b{font-size:var(--text-md);font-weight:700}.lp-faq{display:grid;gap:10px}.lp-faq details{padding:18px 22px;border-radius:18px;border:1px solid var(--line);background:var(--surface)}.lp-faq summary{color:var(--text);font-size:var(--text-lg);font-weight:700}.lp-faq details p{margin:var(--space-2) 0 0 26px}.lp-final{padding:96px 0;text-align:center;background:radial-gradient(50% 80% at 50% 100%,color-mix(in srgb,var(--accent) 26%,transparent),transparent 70%),var(--bg-elevated);border-top:1px solid var(--line)}.lp-final h2{font-size:clamp(2rem,4.6vw,3.4rem);letter-spacing:-.03em;line-height:1.08}.lp-final p{color:var(--text-2);font-size:var(--text-lg);margin-bottom:var(--space-6)}.lp-final .lp-cta{justify-content:center}.lp-footer{border-top:1px solid var(--line);padding:40px 0}.lp-footer-inner{display:grid;gap:var(--space-5)}@media(min-width:760px){.lp-footer-inner{grid-template-columns:1fr auto;align-items:start}}.lp-footer nav{display:flex;flex-wrap:wrap;gap:10px 22px}.lp-footer nav a{color:var(--text-2);font-size:var(--text-sm);font-weight:600}.lp-footer nav a:hover{color:var(--text)}.lp-copy{grid-column:1 / -1;margin:0}html:has(.lp){scroll-behavior:smooth}.lp [id]{scroll-margin-top:80px}@media(max-width:600px){.lp-container{padding-inline:max(16px,env(safe-area-inset-left)) max(16px,env(safe-area-inset-right))}.lp-hero{padding:28px 0 48px}.lp-hero-grid{gap:32px}.lp-hero h1{font-size:clamp(2.25rem,10vw,3.2rem)}.lp-badge{font-size:.75rem;padding:6px 10px}.lp-badge-dot{flex:none}.lp-cta{display:grid;grid-template-columns:1fr}.lp-cta .btn{min-height:48px;white-space:normal}.lp-trust{gap:8px;flex-direction:column}.lp-section,.lp-final{padding-block:48px}.lp-section-head{margin-bottom:28px}.lp-section h2,.lp-final h2{font-size:clamp(1.7rem,7.5vw,2.25rem)}.lp-section-lead{font-size:1rem}.lp-pillar,.lp-lecturers{padding:20px;border-radius:22px;gap:28px;min-width:0}.lp-pillar-visual{padding:12px;min-height:0;min-width:0;border-radius:16px}.mock{padding:12px;min-width:0}.mock-topic{padding:8px;gap:6px}.mock-topic-title{min-width:0;overflow-wrap:anywhere}.mock-bars{flex:none}.mock-drill{flex-wrap:wrap;gap:8px}.lp-insight{padding:12px;min-width:0}.lp-lecturers li svg{flex:none}.lp-steps li,.lp-science-item{padding:22px}.lp-faq details{padding:12px 16px}.lp-faq summary{min-height:44px;font-size:1rem}.lp-faq details p{margin-left:0}.lp-footer nav{display:grid;grid-template-columns:1fr 1fr;gap:4px 16px}.lp-footer nav a{display:flex;align-items:center;min-height:44px}.iphone{aspect-ratio:auto}.iphone-display{height:auto}.demo-feed-body{overflow:visible}.demo-visual input:not([type=range]){font-size:16px}.demo-visual input[type=range]{min-height:44px}.demo-visual summary{min-height:44px}}@media(prefers-reduced-motion:reduce){html:has(.lp){scroll-behavior:auto}}.lp-hero h1{font-size:clamp(2.3rem,5vw,3.9rem)}.lp-hero-insight{position:absolute;z-index:3;left:-46%;bottom:16%;width:252px;display:grid;gap:8px;padding:14px 16px;border-radius:18px;background:color-mix(in srgb,var(--bg-elevated) 86%,transparent);backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);border:1px solid var(--line-strong);box-shadow:var(--shadow-lg);font-size:var(--text-xs);animation:insight-in .9s var(--ease) .9s backwards,insight-float 7s ease-in-out 2s infinite}.lp-hero-insight-head{display:flex;align-items:center;gap:6px;font-weight:750;color:var(--text);font-size:var(--text-sm)}.lp-hero-insight-row{display:grid;grid-template-columns:96px minmax(0,1fr);gap:8px;align-items:center;color:var(--text-3)}.lp-hero-insight-row .topic-meter b{min-width:0;font-size:var(--text-xs)}.lp-hero-insight-note{color:var(--text);font-weight:650}.lp-hero-insight-warn{display:inline-flex;gap:4px;align-items:center;color:var(--warning)}.lp-live-dot{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 0 3px var(--success-soft);animation:pulse-dot 2s ease-in-out infinite}.lp-example-tag{margin-left:auto;padding:1px 7px;border-radius:999px;background:var(--surface-2);color:var(--text-3);font-size:10px;font-weight:650}.lp-hero-caption{display:flex;align-items:center;justify-content:center;gap:6px;margin:14px 0 0;color:var(--text-3);font-size:var(--text-xs);font-weight:600}@keyframes insight-in{0%{opacity:0;transform:translate(-18px) scale(.96)}to{opacity:1;transform:none}}@keyframes insight-float{0%,to{transform:translateY(0)}50%{transform:translateY(8px)}}@media(max-width:979px){.lp-hero-insight{position:relative;left:auto;bottom:auto;width:100%;margin-top:18px;animation:insight-in .7s var(--ease) .6s backwards}}.lp-outcomes-section{padding-top:32px}.lp-outcomes{display:grid;gap:var(--space-4);grid-template-columns:repeat(auto-fit,minmax(min(100%,250px),1fr))}.lp-outcome{padding:28px;border-radius:24px;border:1px solid var(--line);background:radial-gradient(90% 80% at 0% 0%,color-mix(in srgb,var(--accent) 9%,transparent),transparent 70%),var(--surface);transition:transform var(--normal) var(--ease),border-color var(--normal) var(--ease),box-shadow var(--normal) var(--ease)}.lp-outcome h3{font-size:var(--text-xl);letter-spacing:-.01em}.lp-outcome p{margin:0}@media(hover:hover){.lp-outcome:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-md)}}.lp-dashboard-section{background:radial-gradient(50% 40% at 50% 0%,color-mix(in srgb,var(--accent) 10%,transparent),transparent 70%),var(--bg-elevated);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.lp-browser{border-radius:20px;overflow:hidden;border:1px solid var(--line-strong);background:var(--bg);box-shadow:0 40px 100px -40px #0000008c,var(--shadow-md);text-align:left}.lp-browser-bar{display:flex;align-items:center;gap:12px;padding:10px 14px;background:var(--surface-2);border-bottom:1px solid var(--line)}.lp-browser-dots{display:inline-flex;gap:6px}.lp-browser-dots i{width:11px;height:11px;border-radius:50%;background:#ff5f57}.lp-browser-dots i:nth-child(2){background:#febc2e}.lp-browser-dots i:nth-child(3){background:#28c840}.lp-browser-url{display:inline-flex;align-items:center;gap:6px;flex:1;max-width:360px;margin:0 auto;padding:4px 12px;border-radius:8px;background:var(--bg);color:var(--text-3);font-size:12px;justify-content:center}.lp-example-chip{font-size:11px;color:var(--text-3);font-weight:650;white-space:nowrap}.lp-browser-body{padding:clamp(14px,2.4vw,28px);display:grid;gap:var(--space-4)}.lp-preview-head{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;flex-wrap:wrap}.lp-preview-head .eyebrow{margin-bottom:2px}.lp-preview-title{font:800 clamp(1.2rem,2.4vw,1.6rem)/1.15 var(--font-display);letter-spacing:-.02em}.lp-browser .kpis{margin:0;grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr))}.lp-preview-grid{display:grid;gap:var(--space-4);grid-template-columns:minmax(0,1.3fr) minmax(0,1fr)}.lp-preview-topics{display:grid;gap:4px}.lp-preview-topic{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(110px,1fr) 42px;gap:10px;align-items:center;padding:7px 0;border-top:1px solid var(--line);font-size:var(--text-sm)}.lp-preview-topic:first-child{border-top:0}.lp-preview-topic>span:first-child{display:flex;gap:6px;align-items:center;min-width:0;font-weight:600}.lp-preview-topic em{font-style:normal}@media(max-width:860px){.lp-preview-grid{grid-template-columns:minmax(0,1fr)}.lp-example-chip{display:none}}.lp-features{display:grid;gap:var(--space-4);margin-top:var(--space-6);grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}.lp-feature{padding:22px;border-radius:20px;border:1px solid var(--line);background:var(--surface);transition:transform var(--normal) var(--ease),border-color var(--normal) var(--ease)}.lp-feature h3{font-size:var(--text-lg);margin:14px 0 6px}.lp-feature p{margin:0;font-size:var(--text-sm)}@media(hover:hover){.lp-feature:hover{transform:translateY(-3px);border-color:var(--line-strong)}}@media(min-width:860px){.lp-steps.lp-steps-4{grid-template-columns:repeat(4,1fr)}}.lp-trust-grid{display:grid;gap:1px;grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr));border-radius:24px;overflow:hidden;border:1px solid var(--line);background:var(--line)}.lp-trust-item{display:flex;gap:14px;align-items:flex-start;padding:24px;background:var(--surface)}.lp-trust-item>svg{flex:none;color:var(--accent);margin-top:2px}.lp-trust-item h3{font-size:var(--text-md);margin-bottom:4px}.lp-trust-item p{margin:0;font-size:var(--text-sm)}.lp-final .eyebrow{margin-bottom:var(--space-3)}@media(prefers-reduced-motion:reduce){.lp-hero-insight,.lp-live-dot{animation:none}}.lp-engine-grid{display:grid;gap:var(--space-4);grid-template-columns:repeat(auto-fit,minmax(min(100%,240px),1fr));margin-bottom:var(--space-7)}.lp-engine-card{padding:22px;border-radius:20px;border:1px solid var(--line);background:color-mix(in srgb,var(--surface) 92%,transparent);transition:transform var(--normal) var(--ease),border-color var(--normal) var(--ease)}.lp-engine-card h3{font-size:var(--text-lg);margin:14px 0 6px}.lp-engine-card p{margin:0;font-size:var(--text-sm)}@media(hover:hover){.lp-engine-card:hover{transform:translateY(-3px);border-color:var(--line-strong)}}.lp-engine-demo-head{max-width:760px;margin:0 auto var(--space-5);text-align:center}.lp-engine-demo-head h3{font-size:clamp(1.4rem,2.6vw,1.9rem);letter-spacing:-.02em}.lp-engine-demo-head p{margin:0}
