:root{color-scheme:light;--paper:#f5f6f8;--ink:#17202e;--muted:#475569;--line:#b8c2cf;--accent:#1d4ed8;--stage:#fff;font:15px/1.5 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink)}header,main,footer{max-width:1440px;margin:auto}header{display:flex;align-items:center;gap:26px;padding:18px 32px;border-bottom:1px solid var(--line)}a{color:var(--accent);text-underline-offset:3px}.brand{font-size:25px;font-weight:750;letter-spacing:-1px;text-decoration:none;color:var(--ink)}.brand-mark{color:var(--accent);margin-left:8px}.edition{font:11px ui-monospace,monospace;letter-spacing:1px;color:var(--muted)}.source{margin-left:auto;font-size:13px}main{padding:24px 32px 32px}.intro{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:24px}.eyebrow{font:11px ui-monospace,monospace;color:var(--accent);letter-spacing:1px;margin:0 0 10px}h1{font-size:clamp(25px,3vw,36px);letter-spacing:-1px;line-height:1.15;margin:0}h2{font-size:22px;line-height:1.3;margin:0 0 8px;letter-spacing:-.4px}.lede{color:var(--muted);font-size:15px;max-width:800px;margin:12px 0 0}button,select,input,textarea{font:inherit;color:var(--ink)}button,select{border:1px solid var(--line);background:white;padding:9px 12px;border-radius:2px}button{cursor:pointer}button:hover:not(:disabled){background:#edf3ff}button:disabled{opacity:.45;cursor:default}button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible,svg:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.primary,#save-plan{background:var(--accent);color:white;border-color:var(--accent)}.primary:hover:not(:disabled),#save-plan:hover:not(:disabled){background:#1642a6}.check{display:flex;align-items:center;gap:8px;white-space:nowrap}.check input{width:18px;height:18px;accent-color:var(--accent)}.authoring{border-top:2px solid var(--ink);padding-top:18px;margin-bottom:30px}.author-heading{display:flex;justify-content:space-between;gap:24px;align-items:center;margin-bottom:16px}.author-heading p{font-size:13px;color:var(--muted);margin:0}.author-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:24px}#author-stage{display:block;width:100%;height:390px;background:white;border:1px solid var(--line);touch-action:none;overflow:hidden}.author-axis{stroke:#94a3b8;stroke-width:1;vector-effect:non-scaling-stroke}.construction{stroke:#94a3b8;stroke-width:1;stroke-dasharray:4 4;vector-effect:non-scaling-stroke}.author-curve{stroke-width:2;vector-effect:non-scaling-stroke}.series-0{stroke:#1d4ed8}.series-1{stroke:#a21caf}.series-2{stroke:#0f766e}.series-3{stroke:#b45309}.handle{stroke:#475569;stroke-width:2;vector-effect:non-scaling-stroke;fill:white;cursor:crosshair}.handle.control{fill:#e2e8f0}.handle.selected{stroke:#1d4ed8;fill:#dbeafe;stroke-width:3}.handle:focus-visible{outline:none;stroke:#17202e;stroke-width:5}.world-note{display:flex;justify-content:space-between;align-items:center;gap:12px;font:12px ui-monospace,monospace;margin-top:10px}.world-note button{font:12px system-ui,sans-serif}.point-inspector{min-width:0}.point-inspector>label,.coordinates label,.source-editor>label{display:block;font-size:13px;font-weight:600;margin-bottom:7px}#point{width:100%;font-size:13px;max-width:100%}.coordinates{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}.coordinates input{display:block;width:100%;min-width:0;padding:10px;border:1px solid var(--line);background:white;font:14px/1.5 ui-monospace,monospace;margin-top:6px}.edit-actions{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.edit-actions button{font-size:13px}.point-inspector>.primary,.point-inspector>#restore{display:block;width:100%;margin-top:10px}.point-inspector p[role=status]{font-size:13px;line-height:1.5;min-height:40px;overflow-wrap:anywhere}.source-editor{border-top:1px solid var(--line);padding-top:14px;margin-top:20px}details{font-size:13px;margin:18px 0}summary{cursor:pointer;color:var(--accent);font-weight:600;line-height:1.6}.source-editor p{color:var(--muted)}textarea{display:block;width:100%;resize:vertical;min-height:200px;border:1px solid var(--line);padding:14px;background:white;font:13px/1.6 ui-monospace,monospace}.preview-heading{border-top:2px solid var(--ink);padding-top:18px}.workbench{display:grid;grid-template-columns:minmax(0,1fr) 290px;border:1px solid var(--line);background:white;margin-top:16px}.stage-column{min-width:0;padding:18px}.bar{display:flex;align-items:center;gap:16px;margin-bottom:16px;font-size:13px}.bar .mode{margin-right:auto;display:flex;gap:4px}.mode button[aria-pressed=true]{background:var(--ink);color:white}.stage-shell{position:relative;background:var(--stage);min-height:240px;display:flex;justify-content:center;align-items:center;overflow:hidden}#stage{display:block;width:100%;height:auto;max-height:540px;aspect-ratio:16/9;background:var(--stage)}#stage.portrait{width:auto;max-width:100%;height:480px;aspect-ratio:9/16}#stage.square{max-width:540px;aspect-ratio:1}.stage-caption{position:absolute;bottom:10px;left:12px;right:12px;display:flex;justify-content:space-between;pointer-events:none;font:11px ui-monospace,monospace;color:var(--muted);background:#fffffff0;gap:12px}.transport{display:flex;align-items:center;gap:12px;margin-top:16px}#play{width:40px;height:36px;padding:0}.timeline-label{flex:1;display:flex;align-items:center;gap:10px;font-size:13px}.timeline-label input{width:100%;accent-color:var(--accent)}output{font:12px ui-monospace,monospace;white-space:nowrap}#witness{font-size:12px;padding:7px 10px}.preview-note{font-size:12px;color:var(--muted);line-height:1.6;margin:10px 0 0}.inspector{border-left:1px solid var(--line);padding:22px}.inspector p{font-size:13px;color:var(--muted)}.inspector button{display:block;width:100%;text-align:left;margin-top:10px;font-size:13px}dl{margin:22px 0;display:grid;grid-template-columns:1fr auto;gap:9px;font-size:13px}dt{color:var(--muted)}dd{font:13px ui-monospace,monospace;margin:0}.notice{padding:10px;border-left:3px solid #a21caf;background:#faf2ff;font-size:13px;margin:16px 0}.explanation{display:flex;gap:32px;border-top:1px solid var(--line);padding-top:20px;margin-top:24px}.explanation>div{flex:1}.number{font:12px ui-monospace,monospace;color:var(--accent)}.explanation h3{font-size:17px;margin:8px 0}.explanation p{font-size:13px;color:var(--muted);margin:0}footer{display:flex;gap:24px;justify-content:space-between;padding:22px 32px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}[hidden]{display:none!important}@media(max-width:950px){.author-grid{grid-template-columns:minmax(0,1fr) 300px;gap:16px}.workbench{grid-template-columns:1fr}.inspector{border-left:0;border-top:1px solid var(--line)}.edition{display:none}}@media(max-width:720px){header{padding:16px 18px}main{padding:22px 18px}.intro{align-items:start;flex-direction:column}.author-grid{grid-template-columns:1fr}#author-stage{height:310px}.author-heading{align-items:start;gap:12px}.author-heading p{max-width:280px}.coordinates input{font-size:15px}.explanation{flex-direction:column;gap:20px}footer{padding:20px 18px;flex-wrap:wrap}}@media(max-width:430px){main{padding:20px 14px}.author-heading{flex-direction:column}.world-note{align-items:start;font-size:11px}.world-note span{max-width:175px}.world-note button{max-width:120px}#author-stage{height:280px}.stage-column{padding:12px}.bar,.transport{flex-wrap:wrap;gap:8px}.bar .mode{flex-basis:100%;margin:0}.timeline-label{min-width:100px}#witness{margin-left:auto}.stage-caption{font-size:10px}#stage.portrait{height:440px}.inspector{padding:18px}}