:root{color-scheme:dark;--bg: #0a0d14;--bg-elevated: #10151f;--panel: #121824;--panel-2: #161d2b;--line: rgba(255, 255, 255, .08);--line-strong: rgba(255, 255, 255, .16);--text: #e8ecf5;--text-dim: #9aa6bd;--text-faint: #6b7689;--accent: #7c9cff;--accent-soft: rgba(124, 156, 255, .15);--accent-2: #c084fc;--s-active: #7c9cff;--s-compare: #f0a35e;--s-window: #56c8b6;--s-visited: #8b93a7;--s-done: #a78bfa;--s-success: #4ade80;--s-error: #fb7185;--easy: #4ade80;--medium: #fbbf24;--hard: #fb7185;--radius: 14px;--radius-sm: 9px;--mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;--sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Inter, sans-serif;--shadow: 0 10px 30px rgba(0, 0, 0, .35);--ease: cubic-bezier(.22, .61, .36, 1)}:root[data-theme=light]{color-scheme:light;--bg: #f6f7fb;--bg-elevated: #ffffff;--panel: #ffffff;--panel-2: #f2f4f9;--line: rgba(15, 23, 42, .1);--line-strong: rgba(15, 23, 42, .2);--text: #131a28;--text-dim: #566178;--text-faint: #7a8397;--accent: #3b62d9;--accent-soft: rgba(59, 98, 217, .12);--accent-2: #9333ea;--s-active: #3b62d9;--s-compare: #d97706;--s-window: #0d9488;--s-visited: #64748b;--s-done: #7c3aed;--s-success: #16a34a;--s-error: #e11d48;--easy: #16a34a;--medium: #b45309;--hard: #e11d48;--shadow: 0 10px 30px rgba(15, 23, 42, .1)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}button{font:inherit;color:inherit;cursor:pointer;background:none;border:none}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:8px;border:3px solid transparent;background-clip:content-box}::-webkit-scrollbar-track{background:transparent}.app{display:grid;grid-template-columns:296px minmax(0,1fr);height:100%;overflow:hidden}.app.sidebar-collapsed{grid-template-columns:minmax(0,1fr)}.app.sidebar-collapsed>.sidebar{display:none}.sidebar{border-right:1px solid var(--line);background:var(--bg-elevated);display:flex;flex-direction:column;min-height:0}.brand{padding:18px 18px 12px;display:flex;align-items:center;gap:10px}.brand-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--accent),var(--accent-2));display:grid;place-items:center;font-size:15px;flex:none}.brand-title{font-weight:650;letter-spacing:-.01em}.brand-sub{font-size:11px;color:var(--text-faint)}.search-wrap{padding:0 14px 10px;position:relative}.search{width:100%;padding:9px 12px 9px 32px;border-radius:10px;background:var(--panel-2);border:1px solid var(--line);color:var(--text);outline:none;transition:border-color .15s var(--ease),box-shadow .15s var(--ease)}.search:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.search-icon{position:absolute;left:24px;top:50%;transform:translateY(-50%);color:var(--text-faint);pointer-events:none;display:flex}.filters{display:flex;gap:6px;padding:0 14px 10px;flex-wrap:wrap}.chip{padding:4px 10px;border-radius:999px;border:1px solid var(--line);font-size:11.5px;color:var(--text-dim);background:var(--panel-2);transition:all .15s var(--ease);white-space:nowrap}.chip:hover{border-color:var(--line-strong);color:var(--text)}.chip.on{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.solution-list{overflow-y:auto;flex:1;padding:4px 10px 24px;min-height:0}.group-label{font-size:10.5px;text-transform:uppercase;letter-spacing:.09em;color:var(--text-faint);padding:14px 8px 6px;font-weight:600;position:sticky;top:0;background:var(--bg-elevated);z-index:1}.sol-item{width:100%;text-align:left;padding:7px 10px;border-radius:9px;display:flex;align-items:center;gap:9px;color:var(--text-dim);transition:background .12s var(--ease),color .12s var(--ease)}.sol-item:hover{background:var(--panel-2);color:var(--text)}.sol-item.on{background:var(--accent-soft);color:var(--text)}.sol-item-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.dot{width:7px;height:7px;border-radius:50%;flex:none}.dot.easy{background:var(--easy)}.dot.medium{background:var(--medium)}.dot.hard{background:var(--hard)}.no-results{padding:24px 12px;color:var(--text-faint);text-align:center;font-size:13px}.main{display:flex;flex-direction:column;min-width:0;min-height:0}.topbar{display:flex;align-items:center;gap:14px;padding:14px 20px;border-bottom:1px solid var(--line);background:var(--bg-elevated);flex-wrap:wrap}.topbar h1{font-size:17px;margin:0;font-weight:640;letter-spacing:-.015em}.title-block{min-width:0}.mobile-links,.icon-btn.code-btn{display:none}.meta-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:3px}.tag{font-size:11px;padding:2px 8px;border-radius:999px;border:1px solid var(--line);color:var(--text-dim);background:var(--panel-2);white-space:nowrap}.tag.easy{color:var(--easy);border-color:color-mix(in srgb,var(--easy) 40%,transparent);background:color-mix(in srgb,var(--easy) 12%,transparent)}.tag.medium{color:var(--medium);border-color:color-mix(in srgb,var(--medium) 40%,transparent);background:color-mix(in srgb,var(--medium) 12%,transparent)}.tag.hard{color:var(--hard);border-color:color-mix(in srgb,var(--hard) 40%,transparent);background:color-mix(in srgb,var(--hard) 12%,transparent)}.tag.mono{font-family:var(--mono);font-size:10.5px}.topbar-actions{margin-left:auto;display:flex;align-items:center;gap:8px}.desktop-links{display:contents}.icon-btn{width:34px;height:34px;border-radius:10px;border:1px solid var(--line);background:var(--panel-2);display:grid;place-items:center;color:var(--text-dim);transition:all .15s var(--ease)}.icon-btn:hover{color:var(--text);border-color:var(--line-strong)}.link-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border-radius:10px;border:1px solid var(--line);background:var(--panel-2);color:var(--text-dim);font-size:12.5px;text-decoration:none;transition:all .15s var(--ease)}.link-btn:hover{color:var(--text);border-color:var(--line-strong)}.workspace{flex:1;display:grid;grid-template-columns:minmax(340px,.85fr) minmax(0,1.15fr);gap:16px;padding:16px 20px 0;min-height:0;overflow:hidden}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);display:flex;flex-direction:column;min-height:0;overflow:hidden}.panel-head{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--line);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--text-faint);font-weight:600;flex:none}.panel-head .spacer{flex:1}.viz-panel.maximized{position:fixed;top:20px;right:20px;bottom:20px;left:20px;z-index:200;box-shadow:var(--shadow);animation:viz-pop-in .16s var(--ease)}.viz-scrim{z-index:190}@keyframes viz-pop-in{0%{opacity:0;transform:scale(.98)}}@media (max-width: 640px){.viz-panel.maximized{top:8px;right:8px;bottom:8px;left:8px}}.code-scroll{overflow:auto;flex:1;padding:10px 0 16px;min-height:0}.code-line{display:flex;gap:14px;padding:0 14px;font-family:var(--mono);font-size:12.5px;line-height:1.65;white-space:pre;border-left:2px solid transparent;transition:background .18s var(--ease),border-color .18s var(--ease)}.code-line .ln{color:var(--text-faint);opacity:.55;-webkit-user-select:none;user-select:none;text-align:right;min-width:22px;flex:none}.code-line.hot{background:linear-gradient(90deg,var(--accent-soft),transparent 85%);border-left-color:var(--accent)}.code-line.hot .ln{color:var(--accent);opacity:1}.tok-comment{color:var(--text-faint);font-style:italic}.tok-string{color:#7fd6a3}.tok-number{color:#f0a35e}.tok-keyword{color:#c084fc}.tok-type{color:#66d9e8}.tok-method{color:#8fb0ff}.tok-annotation{color:#f0a35e}.tok-punct{color:var(--text-dim)}:root[data-theme=light] .tok-string{color:#0f7b52}:root[data-theme=light] .tok-number{color:#b45309}:root[data-theme=light] .tok-keyword{color:#7c3aed}:root[data-theme=light] .tok-type{color:#0e7490}:root[data-theme=light] .tok-method{color:#2551c2}.stage-scroll{flex:1;overflow:auto;padding:16px;min-height:0;display:flex;flex-direction:column;gap:18px}.viz-block{display:flex;flex-direction:column;gap:8px}.viz-title{font-size:11px;letter-spacing:.07em;text-transform:uppercase;color:var(--text-faint);font-weight:600}.viz-note{font-size:12px;color:var(--text-dim)}.viz-empty{font-size:12.5px;color:var(--text-faint);font-style:italic;padding:6px 2px}.cell{--tone: var(--line-strong);min-width:42px;height:42px;padding:0 8px;border-radius:var(--radius-sm);border:1.5px solid var(--line);background:var(--panel-2);display:grid;place-items:center;font-family:var(--mono);font-size:13px;color:var(--text);transition:border-color .2s var(--ease),background .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease)}.cell.s-active,.cell.s-compare,.cell.s-window,.cell.s-done,.cell.s-success,.cell.s-error,.cell.s-visited{border-color:var(--tone);background:color-mix(in srgb,var(--tone) 16%,transparent);color:color-mix(in srgb,var(--tone) 70%,var(--text))}.cell.s-active{--tone: var(--s-active);transform:translateY(-3px);box-shadow:0 6px 16px color-mix(in srgb,var(--s-active) 25%,transparent)}.cell.s-compare{--tone: var(--s-compare);transform:translateY(-3px)}.cell.s-window{--tone: var(--s-window)}.cell.s-visited{--tone: var(--s-visited)}.cell.s-done{--tone: var(--s-done)}.cell.s-success{--tone: var(--s-success)}.cell.s-error{--tone: var(--s-error);opacity:.85}.cell.s-muted{opacity:.35}.array-viz{display:flex;gap:6px;flex-wrap:wrap;padding-top:22px}.array-slot{display:flex;flex-direction:column;align-items:center;gap:4px;position:relative}.slot-index{font-family:var(--mono);font-size:10px;color:var(--text-faint)}.pointer-stack{position:absolute;top:-20px;display:flex;gap:3px;white-space:nowrap}.pointer-stack.below{top:auto;bottom:-20px}.pointer-chip{font-family:var(--mono);font-size:10px;font-weight:600;padding:1px 6px;border-radius:6px;color:#0a0d14;background:var(--s-active);animation:pop .22s var(--ease)}.pointer-chip.t2{background:var(--s-compare)}.pointer-chip.t3{background:var(--s-window)}.pointer-chip.t4{background:var(--s-done)}:root[data-theme=light] .pointer-chip{color:#fff}@keyframes pop{0%{transform:translateY(3px) scale(.9);opacity:0}}.window-band{position:absolute;top:-6px;right:-4px;bottom:-6px;left:-4px;border:1.5px dashed var(--s-window);border-radius:12px;pointer-events:none}.bars-viz{display:flex;align-items:flex-end;gap:4px;min-height:170px;padding-top:22px}.bar-slot{display:flex;flex-direction:column;align-items:center;gap:4px;position:relative;justify-content:flex-end;height:190px}.bar{--tone: var(--accent);width:30px;min-height:2px;border-radius:5px 5px 2px 2px;background:color-mix(in srgb,var(--tone) 35%,transparent);border:1.5px solid color-mix(in srgb,var(--tone) 70%,transparent);position:relative;transition:height .25s var(--ease),background .2s var(--ease),border-color .2s var(--ease);display:flex;align-items:flex-start;justify-content:center}.bar .bar-value{font-family:var(--mono);font-size:10px;color:var(--text-dim);position:absolute;top:-15px}.bar.s-active{--tone: var(--s-active)}.bar.s-compare{--tone: var(--s-compare)}.bar.s-window{--tone: var(--s-window)}.bar.s-done{--tone: var(--s-done)}.bar.s-success{--tone: var(--s-success)}.bar.s-error{--tone: var(--s-error)}.bar.s-muted{opacity:.3}.bar-overlay{position:absolute;border-radius:3px;transition:all .25s var(--ease)}.bar-overlay.water{background:repeating-linear-gradient(45deg,color-mix(in srgb,var(--s-window) 45%,transparent),color-mix(in srgb,var(--s-window) 45%,transparent) 4px,transparent 4px,transparent 8px);border:1px solid color-mix(in srgb,var(--s-window) 60%,transparent)}.bar-overlay.area{background:color-mix(in srgb,var(--s-done) 22%,transparent);border:1.5px dashed color-mix(in srgb,var(--s-done) 70%,transparent)}.bar-overlay.ghost{border:1.5px dashed var(--line-strong)}.grid-viz{display:inline-flex;flex-direction:column;gap:4px}.grid-row{display:flex;gap:4px}.grid-viz .cell{min-width:40px;height:40px;position:relative}.grid-viz.compact .cell{min-width:30px;height:30px;font-size:11px;border-radius:7px}.cell-badge{position:absolute;top:1px;right:3px;font-size:8.5px;color:var(--text-faint);font-family:var(--mono)}.cell.cursor{outline:2px solid var(--accent);outline-offset:2px}.grid-axis{display:flex;gap:4px;font-family:var(--mono);font-size:10px;color:var(--text-faint)}.grid-axis span{min-width:40px;text-align:center}.list-viz{display:flex;align-items:center;gap:0;flex-wrap:wrap;row-gap:26px;padding-top:24px}.list-node-wrap{display:flex;align-items:center;position:relative}.list-node{--tone: var(--line-strong);min-width:46px;height:40px;border-radius:10px;border:1.5px solid var(--line);background:var(--panel-2);display:grid;place-items:center;font-family:var(--mono);font-size:13px;padding:0 10px;transition:all .2s var(--ease)}.list-node.s-active{--tone: var(--s-active);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 18%,transparent);transform:translateY(-2px)}.list-node.s-compare{--tone: var(--s-compare);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 18%,transparent)}.list-node.s-done,.list-node.s-success,.list-node.s-visited,.list-node.s-error,.list-node.s-window{border-color:var(--tone);background:color-mix(in srgb,var(--tone) 16%,transparent)}.list-node.s-done{--tone: var(--s-done)}.list-node.s-success{--tone: var(--s-success)}.list-node.s-visited{--tone: var(--s-visited)}.list-node.s-error{--tone: var(--s-error)}.list-node.s-window{--tone: var(--s-window)}.list-node.s-muted{opacity:.35}.list-arrow{color:var(--text-faint);padding:0 4px;font-size:15px;display:flex;align-items:center}.list-null{font-family:var(--mono);font-size:11px;color:var(--text-faint)}.list-label{position:absolute;bottom:-17px;left:0;right:0;text-align:center;font-size:10px;color:var(--text-faint);font-family:var(--mono)}.list-cycle{font-family:var(--mono);font-size:11px;color:var(--s-error);padding-left:4px}.stack-viz{display:flex;flex-direction:column-reverse;gap:4px;align-items:flex-start}.stack-viz.queue,.stack-viz.frames{flex-direction:column}.stack-row{display:flex;align-items:center;gap:8px}.stack-item{--tone: var(--line-strong);min-width:56px;padding:7px 12px;border-radius:var(--radius-sm);border:1.5px solid var(--line);background:var(--panel-2);font-family:var(--mono);font-size:12.5px;transition:all .2s var(--ease);animation:slide-in .2s var(--ease)}.stack-item.s-active{--tone: var(--s-active);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 18%,transparent)}.stack-item.s-compare{--tone: var(--s-compare);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 18%,transparent)}.stack-item.s-success{--tone: var(--s-success);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 16%,transparent)}.stack-item.s-error{--tone: var(--s-error);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 16%,transparent)}.stack-item.s-done{--tone: var(--s-done);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 14%,transparent)}.stack-item.s-muted{opacity:.4}.stack-tag{font-size:10px;color:var(--text-faint);font-family:var(--mono)}@keyframes slide-in{0%{opacity:0;transform:translateY(6px)}}.map-viz{display:flex;flex-wrap:wrap;gap:6px}.map-entry{--tone: var(--line-strong);display:flex;align-items:center;gap:6px;padding:6px 10px;border-radius:var(--radius-sm);border:1.5px solid var(--line);background:var(--panel-2);font-family:var(--mono);font-size:12px;transition:all .2s var(--ease);animation:pop-in .2s var(--ease)}.map-entry.s-active{--tone: var(--s-active);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 18%,transparent)}.map-entry.s-compare{--tone: var(--s-compare);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 18%,transparent)}.map-entry.s-success{--tone: var(--s-success);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 16%,transparent)}.map-entry.s-error{--tone: var(--s-error);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 16%,transparent)}.map-entry.s-done{--tone: var(--s-done);border-color:var(--tone)}.map-entry.s-muted{opacity:.4}.map-key{color:var(--text)}.map-arrow{color:var(--text-faint)}.map-value{color:var(--accent)}@keyframes pop-in{0%{opacity:0;transform:scale(.94)}}.svg-viz{width:100%;overflow-x:auto}.svg-viz svg{display:block;max-width:100%;height:auto}.svg-viz-natural{overscroll-behavior-x:contain}.svg-viz-natural svg{max-width:none}.node-circle{--tone: var(--line-strong);fill:var(--panel-2);stroke:var(--line-strong);stroke-width:1.5;transition:all .25s var(--ease)}.node-circle.s-active{--tone: var(--s-active);fill:color-mix(in srgb,var(--s-active) 22%,var(--panel-2));stroke:var(--s-active)}.node-circle.s-compare{--tone: var(--s-compare);fill:color-mix(in srgb,var(--s-compare) 22%,var(--panel-2));stroke:var(--s-compare)}.node-circle.s-visited{fill:color-mix(in srgb,var(--s-visited) 20%,var(--panel-2));stroke:var(--s-visited)}.node-circle.s-done{fill:color-mix(in srgb,var(--s-done) 22%,var(--panel-2));stroke:var(--s-done)}.node-circle.s-success{fill:color-mix(in srgb,var(--s-success) 22%,var(--panel-2));stroke:var(--s-success)}.node-circle.s-error{fill:color-mix(in srgb,var(--s-error) 22%,var(--panel-2));stroke:var(--s-error)}.node-circle.s-window{fill:color-mix(in srgb,var(--s-window) 22%,var(--panel-2));stroke:var(--s-window)}.node-circle.s-muted{opacity:.35}.node-text{fill:var(--text);font-family:var(--mono);font-size:12px;text-anchor:middle;dominant-baseline:central;pointer-events:none}.node-badge{fill:var(--text-faint);font-family:var(--mono);font-size:9.5px;text-anchor:middle}.edge{stroke:var(--line-strong);stroke-width:1.6;fill:none;transition:stroke .25s var(--ease),stroke-width .25s var(--ease)}.edge.ghost{stroke-dasharray:4 4;opacity:.5}.edge.s-active{stroke:var(--s-active);stroke-width:2.4}.edge.s-visited{stroke:var(--s-visited)}.edge.s-success{stroke:var(--s-success);stroke-width:2.4}.edge.s-error{stroke:var(--s-error)}.edge.s-muted{opacity:.25}.edge-label{fill:var(--text-faint);font-family:var(--mono);font-size:9.5px;text-anchor:middle}.dtree-edge-label-bg{fill:var(--panel);opacity:.92}.intervals-viz{display:flex;flex-direction:column;gap:6px;width:100%}.interval-row{position:relative;height:26px}.interval-bar{--tone: var(--accent);position:absolute;height:22px;border-radius:6px;background:color-mix(in srgb,var(--tone) 22%,transparent);border:1.5px solid color-mix(in srgb,var(--tone) 75%,transparent);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:10.5px;color:var(--text);transition:all .25s var(--ease);white-space:nowrap;overflow:hidden}.interval-bar.s-active{--tone: var(--s-active)}.interval-bar.s-compare{--tone: var(--s-compare)}.interval-bar.s-done{--tone: var(--s-done)}.interval-bar.s-success{--tone: var(--s-success)}.interval-bar.s-error{--tone: var(--s-error);opacity:.6;text-decoration:line-through}.interval-bar.s-muted{opacity:.35}.interval-axis{position:relative;height:18px;border-top:1px solid var(--line);margin-top:2px}.interval-tick{position:absolute;font-family:var(--mono);font-size:9.5px;color:var(--text-faint);transform:translate(-50%)}.text-viz{display:flex;flex-direction:column;gap:4px;font-family:var(--mono);font-size:12.5px}.text-viz.chips{flex-direction:row;flex-wrap:wrap;gap:6px}.text-line{--tone: var(--line-strong);color:var(--text-dim);padding:3px 0;transition:color .2s var(--ease)}.text-viz.chips .text-line{padding:5px 10px;border-radius:8px;border:1.5px solid var(--line);background:var(--panel-2);color:var(--text);animation:pop-in .2s var(--ease)}.text-line.s-active{--tone: var(--s-active);color:var(--s-active);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 16%,transparent)}.text-line.s-success{--tone: var(--s-success);color:var(--s-success);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 14%,transparent)}.text-line.s-error{--tone: var(--s-error);color:var(--s-error);border-color:var(--tone);background:color-mix(in srgb,var(--tone) 14%,transparent)}.text-line.s-muted{opacity:.45}.heap-wrap{display:flex;flex-direction:column;gap:10px}.explain-bar{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border-top:1px solid var(--line);background:var(--panel-2);flex:none}.explain-icon{width:20px;height:20px;border-radius:6px;display:grid;place-items:center;flex:none;background:var(--accent-soft);color:var(--accent);font-size:12px;margin-top:1px}.explain-text{font-size:13px;line-height:1.5}.explain-bar.success .explain-icon{background:color-mix(in srgb,var(--s-success) 16%,transparent);color:var(--s-success)}.explain-bar.error .explain-icon{background:color-mix(in srgb,var(--s-error) 16%,transparent);color:var(--s-error)}.explain-bar.warn .explain-icon{background:color-mix(in srgb,var(--s-compare) 16%,transparent);color:var(--s-compare)}.result-banner{--tone: var(--accent);margin-top:6px;display:inline-flex;align-items:center;gap:8px;padding:5px 10px;border-radius:8px;font-family:var(--mono);font-size:12px;background:color-mix(in srgb,var(--tone) 14%,transparent);border:1px solid color-mix(in srgb,var(--tone) 45%,transparent);color:var(--tone)}.result-banner.success{--tone: var(--s-success)}.result-banner.error{--tone: var(--s-error)}.result-banner.warn{--tone: var(--s-compare)}.vars-bar{display:flex;gap:6px;flex-wrap:wrap;padding:10px 14px;border-top:1px solid var(--line);flex:none;max-height:96px;overflow-y:auto}.var-pill{display:inline-flex;align-items:baseline;gap:5px;padding:3px 9px;border-radius:8px;background:var(--panel-2);border:1px solid var(--line);font-family:var(--mono);font-size:11.5px}.var-name{color:var(--text-faint)}.var-value{color:var(--accent)}.player{display:flex;align-items:center;gap:12px;padding:12px 20px 16px;flex:none}.play-btn{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#0a0d14;display:grid;place-items:center;transition:transform .15s var(--ease),filter .15s var(--ease);flex:none;box-shadow:0 6px 18px color-mix(in srgb,var(--accent) 30%,transparent)}.play-btn:hover{transform:scale(1.05)}.play-btn:active{transform:scale(.97)}:root[data-theme=light] .play-btn{color:#fff}.step-btn{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:var(--panel-2);color:var(--text-dim);display:grid;place-items:center;transition:all .15s var(--ease);flex:none}.step-btn:hover:not(:disabled){color:var(--text);border-color:var(--line-strong);background:var(--panel)}.step-btn:disabled{opacity:.35;cursor:not-allowed}.scrub{flex:1;display:flex;flex-direction:column;gap:4px;min-width:0}.scrub-track{--thumb: 16px;position:relative;height:26px;display:flex;align-items:center}.scrub input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:6px;border-radius:999px;background:var(--panel-2);border:1px solid var(--line);outline:none;margin:0}.scrub input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:var(--thumb);height:var(--thumb);border-radius:50%;background:var(--accent);border:2px solid var(--bg-elevated);box-shadow:0 0 0 1px var(--accent);cursor:pointer;transition:transform .15s var(--ease)}.scrub input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}.scrub input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--accent);border:2px solid var(--bg-elevated);cursor:pointer}.scrub-fill{position:absolute;left:1px;height:6px;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--accent-2));pointer-events:none;transition:width .12s linear}.scrub-meta{display:flex;justify-content:space-between;font-size:11px;color:var(--text-faint);font-family:var(--mono)}.speed-select,.example-select{padding:7px 10px;border-radius:10px;background:var(--panel-2);border:1px solid var(--line);color:var(--text-dim);font-size:12px;outline:none;cursor:pointer;transition:all .15s var(--ease);max-width:260px}.speed-select:hover,.example-select:hover{color:var(--text);border-color:var(--line-strong)}.input-line{padding:0 20px 4px;font-family:var(--mono);font-size:12px;color:var(--text-dim);display:flex;gap:8px;align-items:center;flex-wrap:wrap}.input-line .label{color:var(--text-faint);text-transform:uppercase;font-size:10px;letter-spacing:.08em;font-family:var(--sans);font-weight:600}.missing-tracer{margin:auto;max-width:420px;text-align:center;color:var(--text-dim);font-size:13px;padding:40px 20px}.legend{display:flex;gap:12px;flex-wrap:wrap;padding:0 20px 10px;font-size:11px;color:var(--text-faint)}.legend-item{display:inline-flex;align-items:center;gap:5px}.legend-swatch{width:10px;height:10px;border-radius:3px;border:1.5px solid var(--tone, var(--line-strong));background:color-mix(in srgb,var(--tone, var(--line-strong)) 25%,transparent)}kbd{font-family:var(--mono);font-size:10px;padding:1px 5px;border-radius:5px;border:1px solid var(--line-strong);background:var(--panel-2);color:var(--text-dim)}.shortcuts{display:flex;gap:10px;align-items:center;font-size:11px;color:var(--text-faint)}@media (max-width: 1100px){.app{grid-template-columns:1fr}.sidebar{display:none}.sidebar.open{display:flex;position:fixed;inset:0 auto 0 0;width:296px;z-index:30;box-shadow:var(--shadow)}.workspace{grid-template-columns:1fr;overflow-y:auto}.code-scroll{max-height:320px}}.menu-btn{display:none}@media (max-width: 1100px){.menu-btn{display:grid}.collapse-btn{display:none}}.scrim{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;z-index:20}@media (max-width: 760px){html,body,#root{height:100dvh}body{font-size:13.5px}button,a{-webkit-tap-highlight-color:transparent}.sidebar.open{width:min(296px,86vw);padding-bottom:env(safe-area-inset-bottom)}.sol-item{padding:10px}.sol-item-title{font-size:13.5px}.chip{padding:6px 12px}.topbar{display:grid;grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"menu title actions" "meta meta meta";align-items:center;padding:10px 12px;column-gap:10px;row-gap:6px}.menu-btn{grid-area:menu}.title-block{display:contents}.topbar h1{grid-area:title;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.topbar-actions{grid-area:actions;gap:6px}.icon-btn.code-btn{display:grid}.icon-btn.on{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}.meta-row{grid-area:meta;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin-top:0}.meta-row::-webkit-scrollbar{display:none}.tag.mono,.desktop-links{display:none}.mobile-links{display:contents}.meta-row .link-btn{padding:2px 8px;border-radius:999px;font-size:11px;flex:none}.meta-row .link-btn svg{width:11px;height:11px}.input-line{padding:8px 12px 0;flex-wrap:nowrap;gap:6px}.input-line>span:not(.label){min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.example-select{flex:none;max-width:44vw}.workspace{grid-template-columns:minmax(0,1fr);grid-template-rows:minmax(0,1fr);gap:0;padding:8px 8px 0;overflow:hidden}.workspace>.code-panel{display:none}.workspace.show-code>.code-panel{display:flex}.workspace.show-code>.panel:not(.code-panel){display:none}.code-scroll{max-height:none}.panel-head{padding:8px 10px}.viz-panel:not(.maximized)>.panel-head{display:none}.stage-scroll{padding:10px;gap:14px}.cell{min-width:34px;height:34px;font-size:12px;padding:0 5px}.grid-viz .cell{min-width:32px;height:32px}.grid-viz.compact .cell{min-width:26px;height:26px}.grid-axis span{min-width:32px}.array-viz{gap:4px}.bars-viz{min-height:140px}.bar-slot{height:150px}.bar{width:22px}.vars-bar{padding:8px 10px;max-height:62px}.explain-bar{padding:10px;max-height:30vh;overflow-y:auto}.explain-text{font-size:12.5px}.player{flex-wrap:wrap;gap:8px;row-gap:2px;padding:6px 12px calc(10px + env(safe-area-inset-bottom))}.scrub{order:-1;flex-basis:100%}.edge-btn,.shortcuts{display:none}.step-btn{width:42px;height:42px}.play-btn{width:48px;height:48px}.speed-select{margin-left:auto;padding:9px 10px}.scrub-track{height:30px}.scrub-track:before{content:"";position:absolute;left:0;right:0;height:6px;border-radius:999px;background:var(--panel-2);border:1px solid var(--line);z-index:0}.scrub input[type=range]{height:30px;background:transparent;border-color:transparent;position:relative;z-index:1}.scrub-fill{z-index:2}.viz-panel.maximized{inset:8px 8px calc(8px + env(safe-area-inset-bottom))}}@media (max-width: 380px){.topbar h1{font-size:14px}.step-btn{width:38px;height:38px}.cell{min-width:30px;height:30px;font-size:11.5px}.meta-row .link-btn:last-child{display:none}}