:root{color-scheme:dark;--bg: #14181f;--panel: #1c222c;--border: #2a3140;--text: #e8ecf1;--muted: #8b96a5;--accent: #3f8cff}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.app-shell{max-width:1200px;margin:0 auto;padding:24px 20px 60px}.app-header h1{margin-bottom:4px;font-size:22px}.app-header p{color:var(--muted);font-size:14px;max-width:640px}.tabs{display:flex;gap:8px;margin:20px 0}.tabs button{background:var(--panel);border:1px solid var(--border);color:var(--text);padding:8px 16px;border-radius:8px;cursor:pointer}.tabs button.active{background:var(--accent);border-color:var(--accent)}.app-main{display:grid;grid-template-columns:1fr 260px;gap:20px}.app-main:has(.side-column:empty),.app-main:not(:has(.side-column)){grid-template-columns:1fr}.panel,.side-column{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:20px}.panel h2{margin-top:0}.panel-sub{color:var(--muted);font-size:13px;margin-bottom:16px}.panel-sub code{background:#0f1319;padding:1px 5px;border-radius:4px}.panel-header{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}.panel-header h2{margin:0}.status-badge{font-size:12px;padding:3px 10px;border-radius:20px;background:#1a2030;border:1px solid var(--border)}.video-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin-bottom:0}.video-tile{position:relative;background:#000;border-radius:8px;overflow:hidden}.video-el{width:100%;display:block;aspect-ratio:16 / 9;background:#000;object-fit:cover}.video-label{position:absolute;bottom:6px;left:8px;font-size:12px;background:#0009;padding:2px 8px;border-radius:4px}.video-off-overlay{position:absolute;inset:0;background:#0c1016;display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--muted);letter-spacing:.02em}.error-text{color:#ff6b6b;font-size:13px}.status{font-weight:600}.status-connected{color:#3fae5c}.status-connecting{color:#e8b93a}.status-disconnected,.status-idle{color:var(--muted)}.controls-row{display:flex;align-items:flex-start;gap:16px;margin-top:16px}.controls-row>button{background:var(--accent);border:none;color:#fff;padding:8px 18px;border-radius:8px;cursor:pointer;height:fit-content}.media-controls{display:flex;justify-content:center;align-items:center;gap:14px;padding:14px 0 10px;border-top:1px solid var(--border);border-bottom:1px solid var(--border);margin:14px 0}.media-btn{width:46px;height:46px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s ease,transform .1s ease;flex-shrink:0}.media-btn:hover{transform:scale(1.08);filter:brightness(1.15)}.media-btn:active{transform:scale(.93)}.media-btn--on{background:#2a3347;color:var(--text);box-shadow:0 0 0 1px var(--border)}.media-btn--off{background:#b91c1c;color:#fff;box-shadow:none}.webrtc-panel{container-type:inline-size}.webrtc-body{display:grid;grid-template-columns:1fr 268px;gap:16px;align-items:start}.webrtc-main{min-width:0}.chat-panel{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:10px;overflow:hidden;background:var(--bg)}.chat-header{padding:10px 14px;font-size:11px;font-weight:700;border-bottom:1px solid var(--border);color:var(--muted);text-transform:uppercase;letter-spacing:.08em}.chat-messages{height:320px;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:10px;scrollbar-width:thin;scrollbar-color:var(--border) transparent}.chat-empty{color:var(--muted);font-size:13px;text-align:center;margin:auto;padding:20px 0}.chat-msg{display:flex;flex-direction:column;max-width:88%;gap:3px}.chat-msg--self{align-self:flex-end}.chat-msg--other{align-self:flex-start}.chat-from{font-size:11px;color:var(--muted);padding:0 6px}.chat-text{padding:8px 12px;border-radius:16px;font-size:13px;line-height:1.45;word-break:break-word}.chat-msg--self .chat-text{background:var(--accent);color:#fff;border-bottom-right-radius:4px}.chat-msg--other .chat-text{background:#1e2633;color:var(--text);border-bottom-left-radius:4px}.chat-time{font-size:10px;color:var(--muted);padding:0 6px}.chat-msg--self .chat-time{align-self:flex-end}.chat-msg--other .chat-time{align-self:flex-start}.chat-input-row{display:flex;gap:6px;padding:10px;border-top:1px solid var(--border)}.chat-input-row input{flex:1;background:var(--panel);border:1px solid var(--border);color:var(--text);padding:8px 12px;border-radius:20px;font-size:13px;outline:none;transition:border-color .15s;min-width:0}.chat-input-row input:focus{border-color:var(--accent)}.chat-input-row input::placeholder{color:var(--muted)}.chat-input-row button{background:var(--accent);border:none;color:#fff;padding:8px 14px;border-radius:20px;cursor:pointer;font-size:13px;white-space:nowrap;transition:opacity .15s}.chat-input-row button:disabled{opacity:.35;cursor:not-allowed}:fullscreen .webrtc-panel{height:100dvh;border-radius:0;border:none;padding:12px 16px;background:#080b0f;display:flex;flex-direction:column;overflow:hidden}:fullscreen .panel-header{flex-shrink:0}:fullscreen .webrtc-body{flex:1;min-height:0;overflow:hidden;display:grid;grid-template-columns:1fr 260px;gap:12px;align-items:stretch}:fullscreen .webrtc-main{display:flex;flex-direction:column;min-height:0;overflow:hidden}:fullscreen .video-grid{flex:1;min-height:0;display:flex;gap:8px}:fullscreen .video-tile{flex:1;min-width:0}:fullscreen .video-el{height:100%;aspect-ratio:unset;object-fit:cover}:fullscreen .media-controls{flex-shrink:0;margin:8px 0}:fullscreen .ptz-controls{flex-shrink:0}:fullscreen .chat-panel{display:flex;flex-direction:column;height:100%;overflow:hidden}:fullscreen .chat-messages{flex:1;height:auto;max-height:none}.timeline{margin-top:4px}.timeline-track{position:relative;height:28px;background:#0f1319;border-radius:6px;cursor:pointer;outline:none}.timeline-track:focus-visible{box-shadow:0 0 0 2px var(--accent)}.timeline-segment{position:absolute;top:0;bottom:0;border-radius:3px;opacity:.85}.timeline-playhead{position:absolute;top:-4px;bottom:-4px;width:2px;background:#fff}.timeline-legend{display:flex;gap:14px;margin-top:10px;flex-wrap:wrap}.legend-item{font-size:12px;color:var(--muted);display:inline-flex;align-items:center;gap:6px}.legend-swatch{width:10px;height:10px;border-radius:2px;display:inline-block}.snapshot-block button{background:transparent;border:1px solid var(--border);color:var(--text);padding:8px 16px;border-radius:8px;cursor:pointer}.snapshot-preview{margin-top:10px}.snapshot-preview img{max-width:220px;border-radius:6px;border:1px solid var(--border);display:block}.snapshot-meta{display:flex;flex-direction:column;gap:4px;font-size:12px;color:var(--muted);margin-top:6px}.snapshot-meta a{color:var(--accent)}.ptz-controls{margin-top:6px;display:flex;align-items:center;gap:24px;flex-wrap:wrap}.ptz-pad{display:flex;flex-direction:column;align-items:center;gap:4px}.ptz-pad-row{display:flex;gap:4px}.ptz-pad button{width:36px;height:36px;background:#0f1319;border:1px solid var(--border);color:var(--text);border-radius:6px;cursor:pointer}.ptz-pad button:disabled{opacity:.4;cursor:not-allowed}.zoom-slider{display:flex;flex-direction:column;font-size:12px;color:var(--muted);gap:6px}.ptz-hint{font-size:12px;color:var(--muted);margin:0}.session-panel h3{margin-top:0;font-size:15px}.participant-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}.participant-list li{font-size:13px;display:flex;align-items:center;gap:8px}.participant-list li.muted{color:var(--muted)}.role-badge{font-size:10px;text-transform:uppercase;padding:2px 6px;border-radius:4px;letter-spacing:.04em}.role-controller{background:#3fae5c33;color:#3fae5c}.role-spectator{background:#8b96a533;color:var(--muted)}@media(max-width:900px){.app-main{grid-template-columns:1fr}}@media(max-width:700px){.app-shell{padding:16px 12px 40px}.webrtc-body{grid-template-columns:1fr}.chat-messages{height:220px}.video-grid{grid-template-columns:1fr}.media-controls{gap:18px}.media-btn{width:52px;height:52px;font-size:22px}.ptz-controls{gap:16px}.tabs button{flex:1;text-align:center}}