:root{--bg:#f6f6f3;--card:#fff;--line:#e3e2dc;--text:#23262b;--muted:#7a7d82;--accent:#2f5d8a;--accent-soft:#e6eef6;--serif:"Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;--sans:system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, SFMono-Regular, Menlo, monospace}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);font:14px/1.45 var(--sans);margin:0}main{max-width:1040px;margin:0 auto;padding:28px 16px 48px}header{margin-bottom:16px}h1{font:400 28px/1.2 var(--serif);letter-spacing:.01em;margin:0 0 4px}.grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start;gap:16px;display:grid}@media (width<=900px){.grid{grid-template-columns:minmax(0,1fr)}}.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px}.label{letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-size:11px}.num{font:13px var(--mono);font-variant-numeric:tabular-nums}.muted{color:var(--muted);font-size:12px}input[type=range]{accent-color:var(--accent);flex:1;min-width:120px;margin:0}select,input[type=number]{font:inherit;color:var(--text);border:1px solid var(--line);background:#fff;border-radius:6px;padding:3px 6px;font-size:13px}button{font:inherit;color:var(--text);cursor:pointer;border:1px solid var(--line);background:#fff;border-radius:6px;padding:5px 12px;font-size:13px}button:hover{border-color:#c9c8c0}button.primary{background:var(--accent);border-color:var(--accent);color:#fff;min-width:76px}button.primary:hover{filter:brightness(1.08)}button:disabled{color:#b5b5b0;cursor:default}button.mute{justify-content:center;align-items:center;gap:5px;min-width:36px;height:30px;padding:0 9px;display:inline-flex}button.mute svg{flex:none;width:18px;height:18px}button.mute.is-muted{color:#b0482a;background:#fbece4;border-color:#e8c2ad;font-size:12px}button.mute.is-muted:hover{border-color:#d9a68c}button.mute.audible{background:var(--accent-soft);color:var(--accent);border-color:#b9cde0}#controls{margin-top:14px}#ghost-row{min-height:28px;margin-top:10px}#ghost-controls{flex:1}#ghost-offset{min-width:80px;max-width:140px}#ghost-sep{width:100%}details{border-top:1px solid var(--line);margin-top:14px;padding-top:10px}summary{cursor:pointer;color:var(--muted);align-items:center;gap:4px;font-size:13px;list-style:none;display:flex}summary::-webkit-details-marker{display:none}summary:before{content:"▸ "}details[open] summary:before{content:"▾ "}details.panel summary .label{color:var(--text);font-size:12px}details.panel[open] summary{margin-bottom:14px}#pc-energy{max-width:360px}#poincare .row+.row{margin-top:10px}#param-form label{grid-template-columns:1.6em 5.5em auto;align-items:center;gap:6px;font-size:13px;display:grid}#param-form .unit{color:var(--muted);font-size:12px}#param-actions{margin-top:10px}#param-status{color:#a33;font-size:12px}#params{font:12px/1.6 var(--mono);color:var(--muted);white-space:pre;margin-top:10px;overflow-x:auto}button.help{width:20px;height:20px;font:600 11px/1 var(--sans);color:#a5a7aa;letter-spacing:0;text-transform:none;background:0 0;border-radius:50%;flex:none;margin-left:auto;padding:0}button.help:hover{color:var(--accent);border-color:#b9cde0}dialog#help{border:1px solid var(--line);max-width:min(460px,100vw - 32px);color:var(--text);background:var(--card);border-radius:10px;padding:0;box-shadow:0 8px 30px #0000001f}dialog#help::backdrop{background:#23262b40}#help-body{padding:18px 20px 4px;font-size:13.5px;line-height:1.5}#help-body h2{font:400 19px/1.3 var(--serif);margin:0 0 8px}#help-body p{margin:0 0 10px}#help-actions{justify-content:flex-end;padding:0 20px 16px;display:flex}.chips{flex-wrap:wrap;gap:6px;display:flex}.chip{cursor:pointer;-webkit-user-select:none;user-select:none;position:relative}.chip input{opacity:0;pointer-events:none;position:absolute}.chip span{border:1px solid var(--line);color:var(--muted);background:#fff;border-radius:999px;padding:3px 11px;font-size:12px;display:inline-block}.chip:hover span{border-color:#c9c8c0}.chip input:checked+span{background:var(--accent-soft);color:var(--accent);border-color:#b9cde0}.chip input:focus-visible+span{outline:2px solid var(--accent);outline-offset:1px}figure{margin:14px 0 0}.scatter-actions{justify-content:flex-end;margin-top:6px}#volume{max-width:110px}