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b{width:25px;height:25px;display:grid;place-items:center;border:1px solid #d8dfda;border-radius:50%;font:500 12px DM Mono,monospace}.stages i{height:1px;background:#d8dfda;width:37px}.stages .active{color:var(--ink)}.stages .active b{color:#fff;background:var(--green);border-color:var(--green)}.stages .finished{color:#407e6c}.stages .finished b{border-color:#68b99b;color:#167958}.intro{min-height:126px;display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:16px}.eyebrow{font:500 10px DM Mono,monospace;letter-spacing:1.35px;color:#70827f;margin:0 0 10px}.intro h1{font-size:clamp(30px,4.4vw,46px);letter-spacing:-2.2px;line-height:1.08;margin:0;font-weight:750}.accent{color:#11a27e}.intro p:not(.eyebrow){margin:9px 0 0;color:#617579;font-size:17px}.practice-link{background:#e6f1e9;border:1px solid #d1e5d6;padding:14px 17px;border-radius:12px;font-weight:650;font-size:14px;white-space:nowrap}.practice-link span{margin-left:15px;color:var(--green)}.workspace{display:grid;grid-template-columns:minmax(330px,.95fr) minmax(410px,1.05fr);gap:17px;align-items:stretch}.viewer-panel,.controls-panel{background:var(--paper);border:1px solid #e6e8df;border-radius:var(--radius);min-width:0;box-shadow:0 6px 24px #1b343508}.viewer-panel{padding:18px 21px 16px;display:flex;flex-direction:column;min-height:615px}.viewer-top,.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.viewer-top .eyebrow,.panel-heading .eyebrow{margin:0}.pill{border:1px solid #e0e8df;background:#f6f8f2;border-radius:99px;padding:6px 10px;color:#607477;font:400 10px DM Mono,monospace;white-space:nowrap}.pill[hidden]{display:none}#cube-host{position:relative;width:100%;height:clamp(320px,36vw,450px);min-height:300px;overflow:hidden;touch-action:none;cursor:grab;isolation:isolate}#cube-host:active{cursor:grabbing}#cube-host 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solid #263e4133}.side-tabs button span{position:relative;z-index:1;font:500 10px DM Mono,monospace;color:#31474a;text-shadow:0 1px 3px white,0 -1px 3px white}.side-tabs button.active{outline:2px solid #148a70;outline-offset:1px;background:#e7f3ea}.holding-instruction{background:#f0f5eb;border-left:3px solid #54a678;border-radius:0 10px 10px 0;padding:11px 13px;color:#345851!important;font-size:14px!important;margin:13px 0 4px!important}.text-button{border:0;padding:9px 2px;background:transparent;color:#147d68;text-decoration:underline;text-underline-offset:3px;font-size:12px;font-weight:600;min-height:40px}.show-again{margin:0 0 8px}.editor{text-align:center;margin:6px auto 13px}.flat-grid{width:min(100%,240px);aspect-ratio:1;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;margin:7px auto}.square{min-width:0;min-height:0;width:100%;aspect-ratio:1;border:2px solid #344a4a;border-radius:10px;background:var(--sticker);box-shadow:inset 0 1px 1px #fff9,0 2px 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var(--line);border-radius:15px;overflow:auto;padding:20px}#webgl-fallback[hidden]{display:none}#webgl-fallback>p{font-size:13px;color:var(--muted)}#fallback-net{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;text-align:center;font-size:11px}.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);aspect-ratio:1;gap:2px;margin-top:3px}.mini-grid i{border:1px solid #23383b;border-radius:3px}.success-badge{width:38px;height:38px;margin:8px auto 12px;border-radius:50%;display:grid;place-items:center;color:#087d60;background:#dff2e4;border:1px solid #b5ddc1;font-size:22px}.ready-list{background:#f2f6ef;border-radius:12px;padding:7px 14px;margin:18px 0}.ready-list p{color:#40806a;font-size:13px;margin:9px 0}.spinner{display:inline-block;width:15px;height:15px;border:2px solid #ffffff77;border-top-color:#fff;border-radius:50%;vertical-align:-2px;margin-right:7px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}#solve-error 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solid #e2eae0;border-radius:15px;padding:13px;margin:15px 0}.turn-symbol{font-size:43px;font-weight:400;color:#07856c;line-height:1}.turn-card>div{display:flex;flex-direction:column;gap:5px}.turn-card>div b{font-size:15px}.turn-card>div span{font-size:11px;color:#677a77}.quarter-badge{margin-left:auto;display:grid;place-items:center;width:37px;height:37px;border-radius:50%;background:#fff;font:500 14px DM Mono,monospace;color:#48625d}.watch-status{min-height:38px!important;text-align:center;font-size:12px!important;color:#4d6865!important;margin:7px 0!important}.watch-button{background:#e9f2e8;color:#176e5b;box-shadow:0 2px #d1e2d3;font-size:14px;min-height:48px;margin-bottom:9px}.watch-button:hover:not(:disabled){background:#dcecdf}.primary:disabled{box-shadow:none}.guide-tools{display:flex;justify-content:space-between;gap:8px}.guide-tools .quiet{flex:1}.speed-control{display:flex;align-items:center;justify-content:space-between;border-top:1px solid 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