:root{--bg: #0d1117;--panel: #161d27;--panel-2: #1c2531;--border: #2a3644;--text: #e6edf3;--muted: #8b98a5;--accent: #2f81f7;--accent-hover: #4c94ff;--danger: #f85149;--success: #3fb950;--warning: #d29922;--radius: 10px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{background:var(--bg);color:var(--text);font-family:Segoe UI,system-ui,-apple-system,sans-serif;font-size:16px;line-height:1.5}button{font:inherit;cursor:pointer}.btn{border:1px solid var(--border);background:var(--panel-2);color:var(--text);border-radius:var(--radius);padding:10px 18px;transition:background .15s ease,transform .1s ease}.btn:hover{background:#232e3d}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}.btn-primary:hover{background:var(--accent-hover)}.btn-danger{background:var(--danger);border-color:var(--danger);color:#fff;font-weight:700}.input{width:100%;padding:12px 14px;border-radius:var(--radius);border:1px solid var(--border);background:var(--panel-2);color:var(--text);font-size:18px;letter-spacing:.35em;text-align:center;outline:none}.input:focus{border-color:var(--accent)}.input::placeholder{color:var(--muted);letter-spacing:normal}.screen{min-height:100dvh;display:flex;align-items:center;justify-content:center;padding:24px}.card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:40px;width:100%;max-width:440px;display:flex;flex-direction:column;gap:18px}.brand{display:flex;align-items:center;gap:12px}.brand svg{flex-shrink:0}.brand h1{font-size:22px;font-weight:700;letter-spacing:-.02em}.brand p{color:var(--muted);font-size:14px}.error-msg{color:var(--danger);font-size:14px;text-align:center}.ok-msg{color:var(--success);font-size:14px;text-align:center}.session-layout{height:100dvh;display:flex;flex-direction:column}.session-topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:var(--panel);border-bottom:1px solid var(--border);flex-wrap:wrap}.session-status{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--muted)}.dot{width:10px;height:10px;border-radius:50%;background:var(--muted)}.dot.live{background:var(--success);animation:pulse 1.6s ease infinite}@keyframes pulse{50%{opacity:.4}}.video-area{flex:1;position:relative;background:#000;overflow:hidden;display:flex;align-items:center;justify-content:center}.video-area video{max-width:100%;max-height:100%;object-fit:contain}.click-canvas{position:absolute;top:0;right:0;bottom:0;left:0;cursor:crosshair}.actionbar{display:flex;align-items:center;gap:8px;padding:10px 16px;background:var(--panel);border-top:1px solid var(--border);flex-wrap:wrap}.actionbar .spacer{flex:1}.chat-log{position:absolute;left:12px;bottom:12px;max-width:320px;max-height:40%;overflow-y:auto;display:flex;flex-direction:column;gap:6px;z-index:5}.chat-bubble{background:#161d27eb;border:1px solid var(--border);border-radius:8px;padding:6px 10px;font-size:13px}.chat-bubble .who{color:var(--accent-hover);font-weight:600;margin-right:6px}.waiting{color:var(--warning);font-size:15px;text-align:center}@media (max-width: 600px){.card{padding:28px 20px}.session-topbar{padding:8px 10px}}