:root{color-scheme:dark;--bg:#101a25;--panel:#182735;--line:#324554;--muted:#a7bac6;--mint:#b9f2d2;--ink:#f1f7f9;--amber:#f4ca92;font-family:system-ui,'Malgun Gothic',sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 20% 0,#23403e66,transparent 60%),var(--bg)}[hidden]{display:none!important}button,textarea{font:inherit}button,a,summary{touch-action:manipulation}button{cursor:pointer;border:1px solid var(--line);background:#243946;color:var(--ink);border-radius:12px;padding:11px 16px;min-height:46px;font-weight:750;transition:background .15s,transform .15s}button:hover:enabled{background:#35505c}button:active:enabled{transform:translateY(1px)}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,summary:focus-visible,textarea:focus-visible{outline:3px solid #b9f2d2;outline-offset:3px}a{color:var(--mint)}.shell{max-width:1440px;margin:auto;padding:26px 32px 42px}.top{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:22px}.eyebrow{color:var(--mint);font-size:12px;letter-spacing:.12em;margin:0 0 7px;font-weight:800}h1{font-size:30px;margin:0;letter-spacing:-1.5px}.tagline{color:var(--muted);font-size:14px;margin:8px 0 0}.more{position:relative;align-self:flex-start;max-width:200px}.more summary{cursor:pointer;color:var(--muted);font-size:13px;padding:10px}.more nav{display:grid;gap:12px;position:absolute;right:0;z-index:30;min-width:180px;background:var(--panel);padding:18px;border:1px solid var(--line);border-radius:12px}.fields{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.fields button{border-radius:999px;background:transparent;color:var(--muted);font-size:13px}.fields button[aria-pressed=true]{background:var(--mint);color:#163729;border-color:var(--mint)}.workbench{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(310px,1fr);gap:20px;align-items:start}.stage,.editor,.results{border:1px solid var(--line);border-radius:20px;overflow:hidden;background:var(--panel)}.stage-head{padding:17px 20px;display:flex;align-items:center;gap:12px;min-height:76px}.step{display:inline-grid;place-items:center;width:28px;height:28px;flex:none;border-radius:9px;background:#345448;color:var(--mint);font-weight:800;font-size:13px}.stage-head p{font-size:14px;margin:0;color:#d2e1e6}.viewport{height:clamp(300px,43vw,475px);position:relative;background:#c1d5c7;overflow:hidden}canvas{display:block;width:100%;height:100%}#loading,#fallback{position:absolute;inset:0;display:grid;place-content:center;text-align:center;background:#182735dd;padding:24px}.stage-caption{padding:15px 20px 17px;border-top:1px solid var(--line);min-height:106px}.stage-caption small{font-size:11px;letter-spacing:.08em;color:var(--mint);font-weight:800}#current-line{display:block;font-size:14px;line-height:1.6;margin:7px 0 5px;overflow-wrap:anywhere}#motion{color:var(--muted);font-size:12px;line-height:1.6;margin:0}.trail-legend{position:absolute;left:12px;top:12px;padding:9px 12px;border-radius:10px;background:#142c37e8;font-size:11px;pointer-events:none;max-width:calc(100% - 24px)}.trail-legend strong,.trail-legend small{display:none}.trail-legend span{margin-right:14px}.trail-legend i{display:inline-block;width:18px;height:3px;background:#e5ad7a;vertical-align:middle;margin-right:4px}.trail-legend .trail-last i{background:#8be2ee}.editor{padding:22px}.editor h2,.results h2{font-size:19px;margin:0 0 6px;letter-spacing:-.5px}.editor .intro{font-size:13px;color:var(--muted);line-height:1.6;margin:0 0 20px}.editor label{font-size:13px;font-weight:800;display:block;margin:0 0 9px}textarea{display:block;width:100%;padding:15px;border:1px solid #547064;border-radius:13px;background:#10212b;color:#f2f9f4;resize:vertical;min-height:122px;font-size:16px;line-height:1.75}#draft-state{font-size:11px;color:var(--muted);line-height:1.5;margin:8px 0 16px}.primary{background:var(--mint);color:#153b2b;border-color:var(--mint);width:100%;min-height:52px}.primary:hover:enabled{background:#d3ffe5}.run-controls{display:flex;gap:8px;margin-top:8px}.run-controls button{flex:1;font-size:12px}.plan-head{display:flex;align-items:center;gap:9px;margin:22px 0 10px;font-size:13px;font-weight:800}.plan-head .step{width:24px;height:24px;background:#30485b;color:#bedbf2}.plan{display:flex;flex-wrap:wrap;gap:6px}.plan span{font-size:11px;border:1px solid #415c6d;border-radius:8px;padding:7px 9px;color:#d1e4ef;line-height:1.5}#validation{font-size:11px;line-height:1.65;color:var(--muted);margin:9px 0 15px}#validation[data-error=true]{color:#ffd3b4}.guide{border-top:1px solid var(--line);padding-top:15px;font-size:12px;line-height:1.8}.guide summary{color:#d2e1e7;cursor:pointer}.guide p{color:var(--muted);margin:10px 0}.guide code{font:inherit;color:#dfeddf;background:#10212b;padding:2px 5px;border-radius:4px}#sample{color:#d8ebdf;font-size:12px;overflow-wrap:anywhere}.limit,#draft-note{font-size:10px;color:var(--muted);line-height:1.6}.results{margin-top:20px;padding:22px}.result-heading{display:flex;gap:12px;align-items:center;margin-bottom:16px}.result-heading .step{background:#624d37;color:var(--amber)}.result-heading h2{margin:0}.difference{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.difference strong{font-size:14px;display:block;width:100%;line-height:1.6;color:var(--mint)}.difference span{border:1px solid #46645d;background:#213e37;font-size:12px;border-radius:8px;padding:8px 10px;line-height:1.6}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.run-card{border:1px solid #536d68;background:#12242d;border-radius:14px;padding:17px}.run-card:first-child{border-color:#796a55}.run-card:only-child{grid-column:1/-1}.run-card h3{font-size:12px;margin:0 0 12px;color:var(--mint)}.run-card:first-child h3{color:var(--amber)}blockquote{margin:0 0 14px;font-size:15px;font-weight:700;line-height:1.7;overflow-wrap:anywhere}.outcome{font-size:13px;color:#d1e1e8;line-height:1.7}dl{display:grid;grid-template-columns:54px minmax(0,1fr);gap:8px;margin:16px 0 0;font-size:12px;line-height:1.6}dt{color:var(--muted)}dd{margin:0}.result-footer{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:16px}.result-footer button{font-size:12px}.result-footer p{flex:1;min-width:220px;margin:0;color:var(--muted);font-size:11px;line-height:1.7}#save-error{font-size:12px;color:#ffd3b4}@media(min-width:1450px){.viewport{height:490px}}@media(max-width:850px){.shell{padding:18px 16px 30px}.top{margin-bottom:18px}h1{font-size:25px}.tagline{font-size:12px;max-width:270px;line-height:1.6}.workbench{grid-template-columns:1fr}.editor{order:-1;padding:18px}.editor .intro{margin-bottom:12px}.plan-head{margin-top:17px}.viewport{height:420px}.stage{scroll-margin-top:12px}.cards{grid-template-columns:1fr}.fields{gap:6px}.fields button{flex:1;padding:9px 8px;font-size:12px}.editor h2{font-size:18px}.results{padding:18px}.more summary{font-size:11px;white-space:nowrap}.run-card{padding:15px}.stage-head{padding:14px 16px}.stage-caption{padding:14px 16px}textarea{min-height:100px}.result-footer p{flex-basis:100%}}@media(max-width:420px){.viewport{height:365px}.shell{padding:16px 12px}.top{gap:4px}.more{max-width:80px}.eyebrow{font-size:10px}.stage-head p{font-size:12px}h1{font-size:24px}.tagline{max-width:240px}.plan span{font-size:10px}}@media(max-height:450px) and (min-width:700px){.shell{padding:14px 20px}.top{margin-bottom:12px}.workbench{grid-template-columns:minmax(0,1.4fr) minmax(285px,1fr);gap:12px}.editor{order:0;padding:15px}.viewport{height:300px}.editor .intro{margin-bottom:10px}.editor h2{font-size:17px}textarea{min-height:100px}.plan-head{margin-top:14px}.stage-head{min-height:60px}.stage-caption{min-height:98px}.guide{padding-top:10px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}