.wb-challenge{--wb-ink:#f7f2e8;--wb-muted:#bdd0d8;--wb-mint:#a5e4cd;box-sizing:border-box;color:var(--wb-ink);background:linear-gradient(145deg,#132732,#0b1823);border:1px solid #405c65;border-radius:24px;padding:clamp(20px,3vw,36px);box-shadow:inset 0 1px #ffffff14,0 22px 60px #0003;font-family:Arial,sans-serif}.wb-challenge *{box-sizing:border-box}.wb-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.wb-challenge .wb-eyebrow{font:12px/1.5 Consolas,monospace;text-transform:uppercase;letter-spacing:.09em;color:var(--wb-mint);margin:0}.wb-step{font:12px Consolas,monospace;color:var(--wb-muted);white-space:nowrap}.wb-challenge h2{margin:14px 0 10px;font-size:clamp(24px,3.2vw,36px);line-height:1.14;letter-spacing:-.035em;color:var(--wb-ink)}.wb-challenge .wb-instruction{color:var(--wb-muted);line-height:1.5;margin:0 0 22px;max-width:52ch}.wb-drawing{background:#f9fbf8;border:1px solid #d8e4dd;border-radius:14px;overflow:hidden;color:#233f38}.wb-drawing svg{width:100%;height:auto;display:block}.wb-drawing text{font:16px Arial,sans-serif;fill:#24473e}.wb-drawing .wb-sheet-label{font:10px Consolas,monospace;letter-spacing:.08em;fill:#506a60}.wb-deck{stroke:#294f43;stroke-width:8}.wb-rail{stroke:#78958a;stroke-width:2}.wb-support{fill:#f9fbf8;stroke:#345e51;stroke-width:1.8}.wb-support .wb-hatch{stroke-width:1}.wb-drawing .wb-node{font-weight:700}.wb-reaction path{fill:none;stroke:#256657;stroke-width:2.5}.wb-reaction text{font-size:14px}.wb-load>path{stroke:#a84a1c;stroke-width:3}.wb-load>text{fill:#993d16;font-weight:700}.wb-handle{cursor:grab;touch-action:none}.wb-handle:active{cursor:grabbing}.wb-handle rect{fill:#e9f5ee;stroke:#2a6953;stroke-width:2}.wb-handle path{fill:none;stroke:#2a6953;stroke-width:2;pointer-events:none}.wb-handle:focus-visible{outline:none}.wb-handle:focus-visible rect{stroke:#1855b0;stroke-width:4}.wb-dimensions{fill:none;stroke:#769083;stroke-width:1}.wb-dimensions text{stroke:none;font-size:13px}.wb-control{margin-top:20px}.wb-control label{display:flex;justify-content:space-between;gap:10px;font-size:14px}.wb-control label span{color:var(--wb-mint);font-variant-numeric:tabular-nums}.wb-control input{width:100%;min-height:36px;margin:4px 0 0;accent-color:var(--wb-mint);cursor:pointer}.wb-range-ends{display:flex;justify-content:space-between;color:var(--wb-muted);font:12px Consolas,monospace}.wb-reactions{display:flex;justify-content:space-between;align-items:center;gap:8px;margin:20px 0 12px}.wb-reactions>div:not(.wb-balance-label){display:grid;gap:4px}.wb-reactions>div:last-child{text-align:right}.wb-reactions span{color:var(--wb-muted);font-size:13px}.wb-reactions strong{font:500 28px/1.2 Consolas,monospace;color:var(--wb-mint);font-variant-numeric:tabular-nums}.wb-reactions small{font-size:14px}.wb-balance-label{font-size:12px;color:var(--wb-muted);text-align:center}.wb-feedback{min-height:48px;font-size:14px;line-height:1.5;color:var(--wb-ink)}.wb-feedback.is-incorrect{color:#ffd4d8;border-left:4px solid #ff8e9b;background:#3c1d29;padding:12px;border-radius:8px}.wb-feedback.is-correct{color:#c0f2dc;border-left:4px solid #85dcb5;background:#15392e;padding:12px;border-radius:8px}.wb-answer{display:grid;gap:8px;margin:20px 0;color:var(--wb-ink)}.wb-answer input{font:inherit;color:#20362d;background:#fff;border:2px solid #93b6a6;padding:12px;border-radius:8px;width:100%}.wb-primary:disabled{opacity:.55;cursor:not-allowed;box-shadow:none}.prototype-app.p-student-app[data-theme=light] .wb-challenge{--wb-ink:#20362d;--wb-muted:#4f655c;--wb-mint:#245c49;background:#f5faf4;border-color:#aac3b2}.prototype-app.p-student-app[data-theme=light] .wb-primary{background:#245c49;color:#fff}.prototype-app.p-student-app[data-theme=light] .wb-feedback.is-incorrect{color:#84202a;background:#fff0f1;border-color:#b42332}.prototype-app.p-student-app[data-theme=light] .wb-feedback.is-correct{color:#194b36;background:#e9f6ec;border-color:#28734c}.wb-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;margin-top:8px}.wb-primary,.wb-link{font:600 14px/1.4 Arial,sans-serif;min-height:44px;cursor:pointer}.wb-primary{border:1px solid #c7f9e5;border-radius:9px;padding:12px 18px;background:var(--wb-mint);color:#09251c;box-shadow:0 3px #559780}.wb-link{background:none;border:0;color:var(--wb-mint);text-decoration:underline;text-underline-offset:4px;padding:4px 0}.wb-challenge button:focus-visible,.wb-challenge input:focus-visible{outline:3px solid #ffe0a1;outline-offset:4px}.wb-challenge .wb-explanation{border-left:2px solid var(--wb-mint);padding-left:14px;font-size:14px;line-height:1.6}.wb-challenge .wb-assumption{color:var(--wb-muted);font-size:11px;line-height:1.5;margin:18px 0 0;max-width:80ch}@media(max-width:480px){.wb-challenge{border-radius:16px;padding:18px 14px}.wb-challenge .wb-eyebrow{font-size:10px}.wb-feedback{min-height:64px}.wb-control label{font-size:12px}.wb-reactions strong{font-size:24px}}