:root{
  --bg:#fff7ef; --card:#ffffff; --text:#1b1b1f; --muted:#6b7280; --accent:#2e73ff; --accent2:#00c6a7;
  --border:#e5e7eb; --warning:#ffb02e; --danger:#ff4d6d;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%;font-family:Inter,ui-sans-serif,system-ui,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--accent);text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:24px}
.header{display:flex;align-items:center;justify-content:space-between;padding:10px 0}
.brand{display:flex;align-items:center;gap:10px}
.logo{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 10px 24px rgba(46,115,255,.35)}
.title{font-weight:800;font-size:22px;letter-spacing:.2px}
.nav a{margin-left:14px;font-weight:600}
.hero{display:flex;justify-content:center;margin-top:18px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:24px;box-shadow:0 8px 30px rgba(0,0,0,.06);max-width:720px;width:100%}
.card h1{font-size:32px;margin:0 0 10px 0}
.subtitle{color:var(--muted)}
.center{display:flex;justify-content:center;gap:16px;margin:18px 0}
.btn{padding:12px 18px;border:none;border-radius:12px;background:var(--accent);color:#fff;font-weight:800;cursor:pointer;transition:.2s;font-size:16px}
.btn.secondary{background:#e5edff;color:#214090}
.btn.warn{background:#f3f7ff;color:#111}
.btn:disabled{opacity:.6;cursor:not-allowed}
.input{width:100%;padding:12px;border-radius:12px;border:1px solid var(--border);background:#fff;color:var(--text);outline:none}
.badge{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#f0f6ff;border:1px solid var(--border);color:#214090;font-size:13px}
.alert{padding:12px;border:1px solid var(--border);background:#f8fbff;border-left:4px solid var(--accent);border-radius:10px;color:#374151;font-size:14px}
.footer{margin-top:24px;text-align:center;color:var(--muted);font-size:13px}
.grid{display:grid;gap:16px;grid-template-columns:1fr 320px}
@media (max-width:900px){.grid{grid-template-columns:1fr}}
.chatbox{display:flex;flex-direction:column;height:64vh;min-height:420px}
.stream{flex:1;overflow:auto;padding:12px;border-radius:12px;background:#fff;border:1px solid var(--border)}
.msg{margin:8px 0;display:flex;gap:10px}
.msg .bubble{max-width:80%;padding:10px 12px;border-radius:12px;border:1px solid var(--border);background:#f8f9fb}
.msg.you .bubble{background:#eef4ff;border-color:#dfe8ff}
.inputbar{display:flex;gap:10px;margin-top:10px}
.video-wrap{display:grid;gap:10px;grid-template-columns:1fr 1fr}
video{width:100%;height:320px;background:#000;border-radius:12px;border:1px solid var(--border)}
.pill{display:inline-flex;align-items:center;gap:8px;padding:6px 10px;border-radius:999px;background:#fff;border:1px solid var(--border);font-size:12px;color:#6b7280}
.small{font-size:12px;color:#6b7280}