:root{--bg: #0b0e14;--panel: #131824;--panel-2: #1a2130;--line: #232c3d;--text: #e6ebf5;--muted: #8a97ad;--accent: #6ea8fe;--ok: #45d69f;--warn: #f0b866;--danger: #ff6b6b;--radius: 14px}*{box-sizing:border-box}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:radial-gradient(1200px 600px at 70% -10%,#16203a 0%,var(--bg) 55%);color:var(--text);min-height:100vh}.shell{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:20px;max-width:1080px;margin:0 auto;padding:28px 20px 48px}@media (max-width: 860px){.shell{grid-template-columns:1fr}}.workspace{display:flex;flex-direction:column;gap:18px}.topbar{display:flex;align-items:center;justify-content:space-between}.eyebrow{margin:0 0 4px;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}h1{margin:0;font-size:30px;letter-spacing:-.02em}h2{margin:0;font-size:16px}.status-pill{padding:7px 14px;border-radius:999px;font-size:13px;font-weight:600;border:1px solid var(--line)}.status-pill.is-live{color:var(--ok);border-color:#45d69f66}.status-pill.is-destroyed{color:var(--danger);border-color:#ff6b6b80}.invariants{display:flex;flex-wrap:wrap;gap:8px}.chip{font-size:12.5px;color:var(--muted);background:var(--panel);border:1px solid var(--line);padding:6px 11px;border-radius:999px}.devices{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media (max-width: 620px){.devices{grid-template-columns:1fr}}.composer,.timeline,.panel-section{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.composer{display:flex;flex-direction:column;gap:10px}.section-header{display:flex;align-items:baseline;justify-content:space-between;gap:8px}.section-header span{font-size:12px;color:var(--muted)}textarea{width:100%;resize:vertical;background:var(--panel-2);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:11px 12px;font:inherit;font-size:14px}textarea:focus{outline:none;border-color:var(--accent)}button{font:inherit;font-weight:600;cursor:pointer;border-radius:10px;border:1px solid var(--accent);background:var(--accent);color:#06101f;padding:10px 14px;transition:opacity .15s ease}button:disabled{opacity:.45;cursor:not-allowed}button.destruct{background:transparent;color:var(--danger);border-color:#ff6b6b8c;align-self:flex-start}.timeline ol{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-direction:column;gap:8px}.capsule{display:grid;grid-template-columns:auto auto 1fr;align-items:center;gap:10px;background:var(--panel-2);border:1px solid var(--line);border-radius:10px;padding:9px 12px;font-size:14px}.capsule .badge{width:24px;height:24px;display:grid;place-items:center;border-radius:50%;font-size:12px;font-weight:700;color:#06101f}.capsule.from-A .badge{background:var(--accent)}.capsule.from-B .badge{background:var(--ok)}.capsule .lane{font-size:11px;color:var(--muted);white-space:nowrap}.capsule .text{word-break:break-word}.empty{color:var(--muted);font-size:13px;padding:6px 2px}.device-panel{display:flex;flex-direction:column;gap:14px}.transport-list,.lifecycle{list-style:none;margin:10px 0 0;padding:0;display:flex;flex-direction:column;gap:10px}.transport-list li{display:flex;flex-direction:column;gap:2px;font-size:13px}.transport-list li span{font-weight:600}.transport-list li em{font-style:normal;font-size:12px;color:var(--muted)}.transport-list li.ok span:before{content:"● ";color:var(--ok)}.transport-list li.pending span:before{content:"○ ";color:var(--warn)}.lifecycle li{display:flex;gap:9px;font-size:13px;color:var(--muted);align-items:flex-start}.lifecycle li span{margin-top:6px;width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 auto}.demo-note p{margin:8px 0 0;font-size:12.5px;color:var(--muted);line-height:1.5}.status-pill{color:var(--muted)}.error{background:#ff6b6b1f;border:1px solid rgba(255,107,107,.4);color:#ffb4b4;border-radius:10px;padding:10px 12px;font-size:13px}.choose{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media (max-width: 620px){.choose{grid-template-columns:1fr}}.choice{display:flex;flex-direction:column;gap:4px;text-align:left;padding:22px 18px;border-radius:var(--radius);cursor:pointer;background:var(--panel);border:1px solid var(--accent);color:var(--text)}.choice.secondary{border-color:var(--line)}.choice .big{font-size:18px;font-weight:700}.choice .sub{font-size:13px;color:var(--muted)}.handshake{display:flex;flex-direction:column;gap:14px}.codebox{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:8px}.codebox textarea{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;word-break:break-all;color:var(--muted)}.hint{margin:0;font-size:12.5px;color:var(--muted);line-height:1.5}button.mini{padding:5px 11px;font-size:12px;background:var(--panel-2);color:var(--text);border-color:var(--line)}.sas{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--panel-2);border:1px solid var(--line);border-radius:12px;padding:12px 16px}.sas-code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:22px;font-weight:700;letter-spacing:.16em;color:var(--accent)}.link-pill{align-self:flex-start;font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;border:1px solid var(--line);color:var(--muted)}.link-pill.is-connected{color:var(--ok);border-color:#45d69f73}.link-pill.is-connecting{color:var(--warn);border-color:#f0b86673}.link-pill.is-failed{color:var(--danger);border-color:#ff6b6b80}.live-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.ttl-graph{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px}.ttl-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:6px}.ttl-label{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}.ttl-count{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:22px;font-weight:700}.chat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px;display:flex;flex-direction:column;gap:12px}.chat .timeline{max-height:320px;overflow-y:auto}.bubble{display:flex;flex-direction:column;gap:2px;max-width:82%;background:var(--panel-2);border:1px solid var(--line);border-radius:12px;padding:8px 12px;font-size:14px}.bubble.from-me{align-self:flex-end;border-color:#6ea8fe66}.bubble.from-them{align-self:flex-start}.bubble .who{font-size:11px;font-weight:700;color:var(--muted)}.bubble .lane{font-size:10.5px;color:var(--muted)}.bubble .text{word-break:break-word}.steps{margin:8px 0 0;padding-left:18px;display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}.app{max-width:480px;margin:0 auto;padding:16px 16px 32px;display:flex;flex-direction:column;gap:14px;min-height:100vh}.appbar{display:flex;align-items:center;justify-content:space-between}.appbar h1{margin:0;font-size:24px;letter-spacing:-.02em}.handshake,.live{display:flex;flex-direction:column;gap:12px}.mode-badge{font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px;background:var(--panel-2);border:1px solid var(--line);color:var(--accent)}.choose{grid-template-columns:1fr}.choice{width:100%}.bubble .meta{display:flex;justify-content:space-between;gap:8px;margin-bottom:2px}.readonly-note{margin:0;font-size:12.5px;color:var(--muted);padding:10px 2px}.info-sheet{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:0 16px}.info-sheet summary{padding:14px 0;cursor:pointer;font-weight:600;font-size:14px;list-style:none}.info-sheet summary::-webkit-details-marker{display:none}.info-sheet summary:before{content:"＋ ";color:var(--muted)}.info-sheet[open] summary:before{content:"－ "}.info-body{padding-bottom:16px;display:flex;flex-direction:column;gap:8px}.landing{max-width:480px;margin:0 auto;padding:32px 22px;min-height:100vh;display:flex;flex-direction:column;gap:22px;justify-content:center}.landing-hero h1{margin:4px 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summary::-webkit-details-marker{display:none}.apk-note-lead{font-size:13px;font-weight:600;color:var(--warn);line-height:1.45}.apk-note-cta{font-size:12.5px;font-weight:600;color:var(--accent)}.apk-note-cta:after{content:" ›"}.apk-note[open] .apk-note-cta:after{content:" ⌄"}.apk-note-body{display:flex;flex-direction:column;gap:8px;padding-top:10px}.version{text-align:center;margin:8px 0 0;font-size:11px;letter-spacing:.03em;color:var(--muted);opacity:.65;font-variant-numeric:tabular-nums}.appbar-right{display:flex;align-items:center;gap:10px}.level-toggle{display:inline-flex;padding:3px;gap:2px;border:1px solid var(--line);border-radius:999px;background:var(--panel);font-size:12px;font-weight:600}.level-toggle .seg{padding:4px 10px;border-radius:999px;color:var(--muted);transition:background .15s,color .15s}.level-toggle .seg.on{background:var(--panel-2);color:var(--text)}.nudge{margin:8px 2px 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0;font-size:13.5px;color:var(--accent);font-weight:600;text-decoration:none}.what-link:hover{text-decoration:underline}