:root{--bg: #f8f9fa;--surface: #ffffff;--border: #e5e7eb;--text: #1f2937;--text-secondary: #6b7280;--accent-host: #dc2626;--accent-viewer: #2563eb;--status-connected: #16a34a;--status-warning: #d97706;--font: system-ui, -apple-system, sans-serif;--font-mono: ui-monospace, monospace;--radius: 8px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body,#app{height:100%}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.5}#app{padding:1rem}.demo-container{max-width:1100px;margin:0 auto}.demo-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem;gap:1rem}.room-badge{display:flex;align-items:center;gap:.5rem;font-size:.875rem;color:var(--text-secondary)}.room-code{font-family:var(--font-mono);font-weight:600;color:var(--text)}.btn-open-viewer{display:flex;align-items:center;gap:.375rem;padding:.5rem .75rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-secondary);font-family:var(--font);font-size:.8125rem;cursor:pointer;transition:all .15s}.btn-open-viewer:hover{border-color:var(--accent-viewer);color:var(--accent-viewer)}.video-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.video-single{display:flex;justify-content:center}.video-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.video-panel.viewer-full{max-width:700px;width:100%}.panel-header{display:flex;align-items:center;justify-content:space-between;padding:.5rem .75rem;border-bottom:1px solid var(--border);background:var(--bg)}.role-badge{font-size:.75rem;font-weight:600;padding:.25rem .5rem;border-radius:4px}.role-badge.host{background:#fef2f2;color:var(--accent-host)}.role-badge.viewer{background:#eff6ff;color:var(--accent-viewer)}.sync-status{display:flex;align-items:center;gap:.375rem;font-size:.75rem;color:var(--text-secondary)}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--status-warning)}.status-dot.connected{background:var(--status-connected)}.status-dot.disconnected{background:#dc2626}.video-wrapper{aspect-ratio:16 / 9;background:#000}.video-wrapper video{width:100%;height:100%;object-fit:contain}.error-banner{position:fixed;bottom:1rem;left:50%;transform:translate(-50%);padding:.75rem 1rem;background:#fef2f2;border:1px solid #fecaca;border-radius:var(--radius);font-size:.875rem;color:#991b1b}.error-banner.hidden{display:none}.error-icon{margin-right:.5rem}@media(max-width:768px){.video-grid{grid-template-columns:1fr}.demo-header{flex-direction:column;align-items:stretch}.btn-open-viewer{justify-content:center}}