:root{--bg: #f7f7f5;--surface: #ffffff;--surface-2: #f1f1ee;--border: #e5e5e0;--text: #1f2328;--text-2: #4b5058;--muted: #777b83;--accent: #58cc02;--accent-dark: #46a302;--blue: #1cb0f6;--danger: #ff4b4b;--gold: #ffc800;--locked: #d7d7d2;--series-1: #2a78d6;--series-2: #eb6834;--grid: #e6e6e1;--radius: 16px;color-scheme:light}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){--bg: #131619;--surface: #1c2025;--surface-2: #252a31;--border: #333a42;--text: #eef0f2;--text-2: #c3c8ce;--muted: #8e959e;--locked: #3a4048;--series-1: #3987e5;--series-2: #d95926;--grid: #2c3238;color-scheme:dark}}:root[data-theme=dark]{--bg: #131619;--surface: #1c2025;--surface-2: #252a31;--border: #333a42;--text: #eef0f2;--text-2: #c3c8ce;--muted: #8e959e;--locked: #3a4048;--series-1: #3987e5;--series-2: #d95926;--grid: #2c3238;color-scheme:dark}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{background:var(--bg);color:var(--text);font-family:Nunito,system-ui,-apple-system,Segoe UI,sans-serif;font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}h1,h2,h3{line-height:1.2;margin:0 0 .5em;font-weight:900}h1{font-size:1.8rem}h2{font-size:1.35rem}h3{font-size:1.05rem}a{color:var(--blue)}code,.mono{font-family:JetBrains Mono,ui-monospace,monospace}.muted{color:var(--muted)}.small{font-size:.85rem}.tiny{font-size:.7rem}.center{text-align:center;display:flex;justify-content:center}.row{display:flex;align-items:center}.row.gap{gap:8px}.row.between{justify-content:space-between}.row.wrap,.wrap{flex-wrap:wrap}.gap{gap:8px}.ok-text{color:var(--accent-dark);font-weight:800}.bad-text{color:var(--danger);font-weight:700}.btn{font:inherit;font-weight:800;border:2px solid var(--border);border-bottom-width:4px;background:var(--surface);color:var(--text);padding:9px 16px;border-radius:14px;cursor:pointer;text-transform:none;transition:transform .05s;white-space:nowrap}.btn:active:not(:disabled){transform:translateY(2px);border-bottom-width:2px}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--accent);border-color:var(--accent-dark);color:#fff}.btn.danger{background:var(--danger);border-color:#d33131;color:#fff}.btn.ghost{background:transparent}.btn.light{background:#ffffffe6;color:#222;border-color:#00000026}.btn.small{padding:5px 10px;font-size:.85rem;border-radius:10px}.btn.full{width:100%;margin-top:8px}.link{background:none;border:0;color:var(--blue);cursor:pointer;font:inherit;font-weight:700;padding:0}.input{font:inherit;padding:9px 12px;border-radius:12px;border:2px solid var(--border);background:var(--surface);color:var(--text);flex:1;min-width:0}.input.bad{border-color:var(--danger)}select{font:inherit;padding:4px 8px;border-radius:8px;border:2px solid var(--border);background:var(--surface);color:var(--text)}.seg{display:inline-flex;background:var(--surface-2);border-radius:12px;padding:3px;gap:2px;flex-wrap:wrap}.seg button{font:inherit;font-weight:800;font-size:.85rem;border:0;background:transparent;color:var(--text-2);padding:6px 11px;border-radius:9px;cursor:pointer;position:relative}.seg button.on{background:var(--surface);color:var(--text);box-shadow:0 1px 3px #00000026}.seg.compact button{padding:4px 8px}.dot-on{position:absolute;top:3px;right:3px;width:7px;height:7px;border-radius:50%;background:var(--accent)}.toggle{display:inline-flex;gap:6px;align-items:center;font-weight:700}.card{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:16px}code.alg{background:var(--surface-2);padding:2px 7px;border-radius:6px;font-size:.92em;word-spacing:2px;display:inline-block}code.alg.big{font-size:1.1rem;padding:8px 12px;display:block;margin:6px 0}code.alg.tiny{font-size:.62rem;padding:1px 4px;word-break:break-word}.app{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:16px;padding:8px 20px;background:var(--surface);border-bottom:2px solid var(--border);position:sticky;top:0;z-index:20}.brand{font-weight:900;font-size:1.3rem;color:var(--accent);text-decoration:none;white-space:nowrap}.mainnav{display:flex;gap:4px;flex:1}.mainnav a{text-decoration:none;color:var(--text-2);font-weight:800;padding:8px 12px;border-radius:12px;border:2px solid transparent}.mainnav a.active{color:var(--blue);background:color-mix(in srgb,var(--blue) 12%,transparent);border-color:color-mix(in srgb,var(--blue) 40%,transparent)}.top-stats{display:flex;gap:12px;align-items:center;font-weight:900;white-space:nowrap}.streak{filter:grayscale(1);opacity:.6}.streak.on{filter:none;opacity:1;color:#ff9600}main{flex:1}.page{max-width:1180px;margin:0 auto;padding:24px 20px 90px}@media (max-width: 760px){.topbar{padding:8px 12px;gap:8px}.brand span{display:none}.mainnav{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:2px solid var(--border);justify-content:space-around;padding:6px 4px calc(6px + env(safe-area-inset-bottom));z-index:30}.mainnav a{display:flex;flex-direction:column;align-items:center;font-size:.7rem;padding:4px 8px}.top-stats{margin-left:auto}.page{padding:16px 16px 100px}}.map-page{display:grid;grid-template-columns:1fr 300px;gap:32px;align-items:start}.map-side{order:2;position:sticky;top:76px}.path{order:1}@media (max-width: 900px){.map-page{grid-template-columns:1fr}.map-side{order:0;position:static;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}.map-side .card{margin:0}}.goal-ring{--p: 0;width:120px;height:120px;margin:8px auto;border-radius:50%;background:conic-gradient(var(--gold) calc(var(--p) * 360deg),var(--surface-2) 0);display:grid;place-items:center}.goal-ring span{background:var(--surface);width:92px;height:92px;border-radius:50%;display:grid;place-items:center;align-content:center;font-weight:900;font-size:1.2rem}.goal-ring small{display:block;font-size:.7rem;color:var(--muted)}.progress{height:14px;border-radius:99px;background:var(--surface-2);overflow:hidden;flex:1}.progress>div{height:100%;background:var(--accent);border-radius:99px;transition:width .4s}.stars span{color:var(--locked)}.stars span.on{color:var(--gold)}.eyebrow{font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}.today-card{display:flex;gap:14px;align-items:center}.today-card .goal-ring{width:96px;height:96px;margin:0;flex-shrink:0}.today-card .goal-ring span{width:74px;height:74px;font-size:1.3rem;line-height:1.1}.today-stats{display:grid;gap:6px}.today-stats div{display:flex;flex-direction:column}.today-stats b{font-size:1.05rem;font-variant-numeric:tabular-nums}.today-stats small{color:var(--muted);font-size:.75rem;font-weight:700}.next-card{border-color:color-mix(in srgb,var(--unit, var(--accent)) 45%,var(--border))}.next-card h3{margin:4px 0;font-size:1.2rem}.collection-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:10px}.collection-item{background:none;border:0;padding:0;cursor:pointer;display:grid;place-items:center}.collection-item:focus-visible{outline:3px solid var(--blue);border-radius:8px}.face-glyph{flex-shrink:0;filter:drop-shadow(0 3px 0 color-mix(in srgb,var(--text) 18%,transparent))}.face-body{fill:#1d1f24}.face-off{fill:color-mix(in srgb,var(--surface-2) 70%,#6b7280);opacity:.55}.face-on{fill:var(--locked)}.units{display:grid;gap:18px;min-width:0}.u-card{background:var(--surface);border:2px solid var(--border);border-radius:20px;overflow:hidden;scroll-margin-top:80px}.u-card.locked{background:color-mix(in srgb,var(--surface-2) 60%,var(--surface))}.u-head{width:100%;display:flex;gap:14px;align-items:center;padding:14px 16px;background:none;border:0;color:var(--text);font:inherit;text-align:left;cursor:pointer;border-left:6px solid var(--unit)}.u-card.locked .u-head{border-left-color:var(--locked)}.u-head:focus-visible{outline:3px solid var(--blue);outline-offset:-3px}.u-text{display:flex;flex-direction:column;gap:1px;flex:1;min-width:0}.u-title{font-weight:900;font-size:1.25rem;line-height:1.2;text-wrap:balance}.u-desc{color:var(--text-2);font-size:.9rem}.u-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex-shrink:0}.chev{color:var(--muted);font-size:.9rem}.pill{display:inline-flex;align-items:center;gap:4px;font-size:.72rem;font-weight:900;text-transform:uppercase;letter-spacing:.05em;padding:2px 9px;border-radius:99px;white-space:nowrap}.pill-locked{background:var(--surface-2);color:var(--muted)}.pill-complete{background:color-mix(in srgb,var(--gold) 30%,transparent);color:color-mix(in srgb,var(--gold) 45%,var(--text))}.pill-in-progress{background:color-mix(in srgb,var(--unit) 22%,transparent);color:color-mix(in srgb,var(--unit) 60%,var(--text))}.pill-new{background:var(--unit);color:#fff}.lock-icon{fill:currentColor;stroke:currentColor}.pill .lock-icon{width:12px;height:12px}.unit-lock{margin:0 16px 16px;background:var(--surface);border:2px dashed var(--border);border-radius:14px;padding:12px 14px;display:grid;gap:6px;justify-items:start}.unit-lock ul{margin:0;padding-left:1.2em;display:grid;gap:8px}.unit-lock li>*{margin-right:6px}.gate-bar{display:block;width:min(220px,100%);height:8px;border-radius:99px;background:var(--surface-2);overflow:hidden;margin:4px 0 2px}.gate-bar>span{display:block;height:100%;background:var(--gold);border-radius:99px}.track{position:relative;margin:0 auto 8px;max-width:520px;width:100%}.track-path{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;overflow:visible}.path-rest{fill:none;stroke:var(--border);stroke-width:6;stroke-dasharray:2 12;stroke-linecap:round}.path-done{fill:none;stroke:var(--unit);stroke-width:6;stroke-linecap:round;opacity:.85}.lnode-wrap{position:absolute;transform:translate(-50%);width:150px;display:flex;flex-direction:column;align-items:center;gap:6px}.lnode{position:relative;width:62px;height:62px;border-radius:16px;border:0;cursor:pointer;display:grid;place-items:center;font:inherit;color:#fff;background:linear-gradient(145deg,color-mix(in srgb,var(--unit) 82%,#fff) 0%,var(--unit) 55%);box-shadow:0 6px color-mix(in srgb,var(--unit) 62%,#000),inset 0 0 0 3px color-mix(in srgb,#fff 18%,transparent);transition:transform .08s}.lnode:active{transform:translateY(4px);box-shadow:0 2px color-mix(in srgb,var(--unit) 62%,#000)}.lnode:focus-visible{outline:3px solid var(--blue);outline-offset:4px}.lnode.locked{background:var(--locked);box-shadow:0 6px color-mix(in srgb,var(--locked) 70%,#000);color:var(--muted)}.lnode.master{background:linear-gradient(145deg,#ffe066,var(--gold) 60%);box-shadow:0 6px #d9a300,inset 0 0 0 3px #ffffff59}.lnode.current{animation:pulse 1.8s ease-in-out infinite}@keyframes pulse{0%,to{box-shadow:0 6px color-mix(in srgb,var(--unit) 62%,#000),0 0 color-mix(in srgb,var(--unit) 45%,transparent)}50%{box-shadow:0 6px color-mix(in srgb,var(--unit) 62%,#000),0 0 0 12px transparent}}.lnode-num{font-family:JetBrains Mono,monospace;font-weight:700;font-size:1.35rem}.lnode-check{font-size:1.6rem;font-weight:900}.lnode-title{font-size:.8rem;font-weight:800;text-align:center;line-height:1.2;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;background:color-mix(in srgb,var(--surface) 85%,transparent);border-radius:6px;padding:0 4px}.pips{display:flex;gap:3px}.pips i{width:9px;height:9px;border-radius:2px;background:var(--locked)}.pips i.on{background:var(--gold)}.start-flag{position:absolute;top:-26px;background:var(--unit);color:#fff;font-weight:900;font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;padding:2px 9px;border-radius:8px;animation:bob 1.4s ease-in-out infinite}@keyframes bob{50%{transform:translateY(-3px)}}.gate{position:absolute;left:50%;transform:translate(-50%);width:min(380px,calc(100% - 16px));display:flex;gap:12px;align-items:center;background:var(--surface);border:2px solid color-mix(in srgb,var(--gold) 55%,var(--border));border-radius:16px;padding:10px 12px;box-shadow:0 4px color-mix(in srgb,var(--gold) 35%,var(--border))}.gate.done{background:color-mix(in srgb,var(--gold) 16%,var(--surface))}.gate.current{border-color:var(--gold)}.gate-trophy{font-size:1.6rem}.gate-text{display:flex;flex-direction:column;flex:1;min-width:0}.gate-text .gate-bar{width:100%}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:color-mix(in srgb,#000 35%,transparent);z-index:50;display:flex;align-items:flex-end;justify-content:center;padding:16px;padding-bottom:calc(16px + env(safe-area-inset-bottom,0px))}.sheet{width:min(520px,100%);background:var(--surface);border-radius:22px;padding:18px;border-top:6px solid var(--unit);box-shadow:0 -8px 40px #00000040;display:grid;gap:14px;animation:rise .18s ease-out;max-height:85vh;overflow:auto}@keyframes rise{0%{transform:translateY(24px);opacity:0}}.sheet-head{display:flex;gap:12px;align-items:flex-start}.sheet-head h3{margin:2px 0;font-size:1.3rem}.sheet-head p{margin:0}.sheet-head>div{flex:1;min-width:0}.sheet-icon{font-size:2rem;width:48px;height:48px;display:grid;place-items:center;background:color-mix(in srgb,var(--unit) 16%,var(--surface));border-radius:14px;flex-shrink:0}.sheet-close{background:none;border:0;font-size:1.2rem;color:var(--muted);cursor:pointer;padding:4px}.sheet .tier-btn{display:grid;grid-template-columns:1fr auto;gap:2px 10px;text-align:left;align-items:center}.sheet .tier-name{font-weight:900}.sheet .tier-desc{grid-column:1 / -1;grid-row:2;font-size:.78rem;font-weight:600;color:var(--muted)}.sheet .tier-btn small{grid-column:2;grid-row:1}@media (max-width: 760px){.sheet-backdrop{padding-bottom:calc(84px + env(safe-area-inset-bottom,0px))}}@media (max-width: 900px){.map-side{grid-template-columns:1fr}.collection{display:none}}@media (max-width: 480px){.u-desc{display:none}.lnode-wrap{width:120px}}@media (prefers-reduced-motion: reduce){.lnode.current,.start-flag,.sheet{animation:none}}.cube-view{position:relative;width:100%;aspect-ratio:1 / 1;max-height:62vh;background:radial-gradient(circle at 50% 40%,var(--surface) 0%,var(--surface-2) 100%);border-radius:var(--radius);border:2px solid var(--border);overflow:hidden}.cube-canvas{position:absolute;top:0;right:0;bottom:0;left:0}.cube-canvas canvas{display:block;cursor:grab}.cube-recenter{position:absolute;top:8px;right:8px;border:0;background:var(--surface);color:var(--text-2);border-radius:8px;width:30px;height:30px;cursor:pointer;font-size:1rem;opacity:.8}.move-buttons{display:grid;grid-template-columns:repeat(6,1fr);gap:4px;margin-top:10px}.move-buttons button{font-family:JetBrains Mono,monospace;font-weight:700;padding:7px 0;border-radius:9px;border:2px solid var(--border);border-bottom-width:3px;background:var(--surface);color:var(--text);cursor:pointer}.move-buttons button:active{transform:translateY(1px)}.keymap{margin-top:12px}.keymap summary{cursor:pointer;font-weight:800;color:var(--text-2)}.keymap-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:4px;margin-top:8px;font-size:.8rem;font-family:JetBrains Mono,monospace}kbd{background:var(--surface-2);border:1px solid var(--border);border-bottom-width:2px;border-radius:4px;padding:0 5px;font-size:.75rem}.ll-diagram{flex-shrink:0}.lesson{max-width:1100px}.lesson-top{display:flex;align-items:center;gap:16px;margin-bottom:20px}.lesson-top .close{font-size:1.4rem;text-decoration:none;color:var(--muted);font-weight:900}.step{display:flex;flex-direction:column;gap:16px}.text-step,.exercise{display:grid;grid-template-columns:1fr minmax(280px,460px);gap:28px;align-items:start}@media (max-width: 820px){.text-step,.exercise{grid-template-columns:1fr;gap:16px}.exercise-cube{order:-1}}.text-body{font-size:1.05rem}.md p{margin:0 0 .8em}.md ul,.md ol{padding-left:1.3em;margin:0 0 .8em}.md li{margin-bottom:4px}.demo-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:12px}.exercise-info h3{font-size:1.4rem}.physical-box,.hint-box{background:color-mix(in srgb,var(--blue) 10%,var(--surface));border:2px solid color-mix(in srgb,var(--blue) 35%,transparent);border-radius:14px;padding:12px 14px;margin:12px 0}.hint-box{background:color-mix(in srgb,var(--gold) 14%,var(--surface));border-color:color-mix(in srgb,var(--gold) 50%,transparent)}.physical-box p,.hint-box p{margin:0 0 6px}.case-extra{display:flex;gap:14px;align-items:center;margin:10px 0}.lesson-footer{position:sticky;bottom:0;display:flex;justify-content:flex-end;align-items:center;gap:16px;padding:14px 16px;margin:0 -16px;border-top:2px solid var(--border);background:var(--bg);z-index:5}.lesson-footer.ok{background:color-mix(in srgb,var(--accent) 16%,var(--bg))}.lesson-footer .ok-text{margin-right:auto;font-size:1.2rem}.lesson-footer .btn{min-width:160px;padding:12px 20px}.quiz{max-width:620px;margin:0 auto;width:100%}.options{display:grid;gap:10px;margin:16px 0}.options.grid2{grid-template-columns:1fr 1fr}.option{font:inherit;font-weight:800;font-size:1.05rem;padding:14px;border-radius:14px;border:2px solid var(--border);border-bottom-width:4px;background:var(--surface);color:var(--text);cursor:pointer;text-align:left}.option.right{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,var(--surface))}.option.wrong{border-color:var(--danger);background:color-mix(in srgb,var(--danger) 12%,var(--surface))}.lesson-finish{display:grid;place-items:center;min-height:70vh}.finish-card{text-align:center;background:var(--surface);border:3px solid;border-radius:24px;padding:32px 40px;max-width:440px}.big-icon{font-size:4rem}.stars{font-size:2.4rem;letter-spacing:6px}.xp-gain{font-size:1.4rem;font-weight:900;color:var(--gold)}.timer-page{display:grid;grid-template-columns:1fr 360px;gap:24px;align-items:start}@media (max-width: 960px){.timer-page{grid-template-columns:1fr}}.scramble-box{display:flex;gap:10px;align-items:center;justify-content:center;margin:16px 0}.scramble{font-size:1.25rem;text-align:center;word-spacing:6px;line-height:1.6}.big-time{font-family:JetBrains Mono,monospace;font-weight:700;font-size:clamp(4rem,14vw,8rem);text-align:center;padding:30px 0;user-select:none;-webkit-user-select:none;touch-action:none;cursor:pointer;border-radius:var(--radius);font-variant-numeric:tabular-nums}.big-time.small-font{font-size:clamp(2.5rem,9vw,4.5rem);padding:10px 0;cursor:default}.big-time.holding{color:var(--danger)}.big-time.ready{color:var(--accent)}.big-time.inspect{color:#ff9600}.phys-timer{min-height:50vh}.timer-cube .cube-view{max-height:52vh}.splits{display:flex;gap:3px;margin:10px 0;font-size:.78rem}.splits>div{background:var(--surface-2);border-radius:6px;padding:4px 6px;min-width:70px;text-align:center;white-space:nowrap;overflow:hidden}.stats{width:100%;border-collapse:collapse}.stats th{text-align:left;color:var(--muted);font-size:.78rem;font-weight:800}.stats td{padding:3px 0;font-weight:700}.solve-list{list-style:none;padding:0;margin:0;max-height:420px;overflow:auto}.solve-row{width:100%;display:grid;grid-template-columns:44px 1fr auto;gap:8px;align-items:center;font:inherit;background:none;border:0;border-bottom:1px solid var(--border);padding:6px 2px;cursor:pointer;color:var(--text);text-align:left}.solve-detail{padding:8px 4px 12px;border-bottom:1px solid var(--border)}.solve-detail code{display:block;margin-bottom:6px;word-spacing:3px}.scramble-track{text-align:center;font-family:JetBrains Mono,monospace;font-size:1.2rem;word-spacing:4px}.scramble-track span{padding:0 3px;border-radius:4px}.scramble-track span.done{color:var(--muted);text-decoration:line-through}.scramble-track span.cur{background:var(--gold);color:#000}.viz-root{color:var(--text)}.viz-legend{display:flex;gap:14px;font-size:.8rem;color:var(--text-2);margin-bottom:4px}.viz-legend i{display:inline-block;width:12px;height:3px;border-radius:2px;vertical-align:middle;margin-right:4px}.viz-wrap{position:relative}.viz{width:100%;height:auto;display:block;touch-action:pan-y}.viz .grid{stroke:var(--grid);stroke-width:1}.viz .tick{fill:var(--muted);font-size:11px;font-family:Nunito,sans-serif}.viz .dlabel{fill:var(--text-2);font-size:11px;font-weight:700;font-family:Nunito,sans-serif}.viz .line{fill:none;stroke-width:2;stroke-linejoin:round;stroke-linecap:round}.viz .crosshair{stroke:var(--muted);stroke-width:1;stroke-dasharray:3 3}.viz .dot{stroke:var(--surface);stroke-width:2}.viz-tip{position:absolute;top:0;transform:translate(-50%);background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:6px 10px;font-size:.78rem;pointer-events:none;white-space:nowrap;box-shadow:0 4px 12px #0000001f}.practice-page section{margin-top:18px}.group-title{display:flex;gap:10px;align-items:baseline}.case-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px}.case-card{font:inherit;display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 8px;border-radius:14px;border:2px solid var(--border);border-bottom-width:4px;background:var(--surface);color:var(--text);cursor:pointer}.case-card.sel{border-color:var(--blue);background:color-mix(in srgb,var(--blue) 10%,var(--surface))}.case-card.box0,.case-card.box1{border-bottom-color:var(--danger)}.case-card.box2,.case-card.box3{border-bottom-color:#ff9600}.case-card.box4,.case-card.box5,.case-card.box6{border-bottom-color:var(--accent)}.grade-bar{position:sticky;bottom:0;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding:14px 16px;background:color-mix(in srgb,var(--accent) 14%,var(--bg));border-top:2px solid var(--border);margin:16px -16px 0;font-weight:800}.trainer .exercise{margin-top:12px}.play-page{display:grid;grid-template-columns:minmax(300px,1fr) 380px;gap:24px;align-items:start}@media (max-width: 860px){.play-page{grid-template-columns:1fr}}.play-cube{position:relative}.play-cube .cube-view{max-height:75vh}.solved-badge{position:absolute;top:12px;left:12px;background:var(--surface);border-radius:10px;padding:4px 10px;font-weight:800;font-size:.85rem;color:var(--muted)}.solved-badge.on{color:var(--accent-dark)}.play-side>*+*{margin-top:12px}.history{display:block;max-height:120px;overflow:auto;word-spacing:3px;font-size:.85rem}.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;margin-bottom:16px}.tile{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);padding:14px;display:flex;flex-direction:column}.tile span{font-size:1.4rem}.tile b{font-size:1.6rem;font-weight:900;font-family:JetBrains Mono,monospace}.tile small{color:var(--muted);font-weight:700}.heatmap{display:grid;grid-template-rows:repeat(7,14px);grid-auto-flow:column;grid-auto-columns:14px;gap:3px;overflow-x:auto}.heatmap i{border-radius:3px;background:var(--surface-2)}.heatmap i.lv1{background:color-mix(in srgb,var(--accent) 30%,var(--surface-2))}.heatmap i.lv2{background:color-mix(in srgb,var(--accent) 55%,var(--surface-2))}.heatmap i.lv3{background:color-mix(in srgb,var(--accent) 80%,var(--surface-2))}.heatmap i.lv4{background:var(--accent-dark)}.unit-row{display:grid;grid-template-columns:160px 1fr 50px;gap:12px;align-items:center;margin-bottom:8px;font-weight:700}.ach-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}.ach{display:flex;flex-direction:column;align-items:center;text-align:center;padding:12px;border-radius:14px;background:var(--surface-2);opacity:.55;filter:grayscale(1)}.ach.got{opacity:1;filter:none;background:color-mix(in srgb,var(--gold) 18%,var(--surface));border:2px solid color-mix(in srgb,var(--gold) 60%,transparent)}.ach span{font-size:2rem}.ach small{color:var(--muted);font-size:.75rem}.setting{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--border);font-weight:700;flex-wrap:wrap}.toasts{position:fixed;bottom:24px;right:16px;display:flex;flex-direction:column;gap:8px;z-index:100}.toast{display:flex;gap:12px;align-items:center;background:var(--surface);border:2px solid var(--gold);border-radius:14px;padding:10px 14px;box-shadow:0 8px 24px #0000002e;animation:pop .3s ease-out;max-width:320px}.toast-icon{font-size:1.8rem}@keyframes pop{0%{transform:translateY(-10px) scale(.95);opacity:0}}@media (max-width: 760px){.toasts{bottom:84px;left:16px}}.tier-list{display:grid;gap:6px;margin-top:8px}.tier-btn{font:inherit;display:flex;justify-content:space-between;align-items:center;gap:8px;padding:8px 10px;border-radius:12px;border:2px solid var(--border);border-bottom-width:4px;background:var(--surface);color:var(--text);cursor:pointer;font-weight:800}.tier-btn small{color:var(--muted);font-weight:700}.tier-btn.done{border-color:color-mix(in srgb,var(--gold) 70%,transparent);background:color-mix(in srgb,var(--gold) 12%,var(--surface))}.tier-btn:disabled{opacity:.5;cursor:not-allowed}.slips{font-weight:900;white-space:nowrap}.slips.bad{color:var(--danger)}.target-clock{margin:10px 0}.target-bar{height:10px;border-radius:99px;background:var(--surface-2);overflow:hidden;margin-bottom:4px}.target-bar>div{height:100%;background:var(--accent);transition:width .1s linear}.target-clock.over .target-bar>div{background:var(--danger)}.target-clock.over span{color:var(--danger);font-weight:800}.iso-diagram{flex-shrink:0}.confirm-inline{display:inline-flex;flex-wrap:wrap;align-items:center;gap:6px}.unit-lock{margin-top:12px;background:var(--surface);border:2px dashed var(--border);border-radius:var(--radius);padding:12px 16px;display:grid;gap:6px;justify-items:start}.unit-lock ul{margin:0;padding-left:1.2em;display:grid;gap:4px}.coach{display:grid;gap:10px}.coach-hint{background:color-mix(in srgb,var(--blue) 9%,var(--surface));border:2px solid color-mix(in srgb,var(--blue) 35%,transparent);border-radius:14px;padding:12px 14px;display:grid;gap:6px;justify-items:start}.coach-hint p{margin:0}.stage-chip{font-size:.75rem;font-weight:900;text-transform:uppercase;letter-spacing:.05em;padding:2px 8px;border-radius:99px;background:var(--blue);color:#fff}.stage-chip.stage-solved{background:var(--accent)}code.alg.big-inline{font-size:1.3rem;padding:2px 10px}.coach-details{margin:10px 0}.coach-details>summary{cursor:pointer;font-weight:800;color:var(--blue);margin-bottom:8px}