* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, Arial, sans-serif; background: #f5f6f8; color: #111827; }
.app { max-width: 1180px; margin: 0 auto; padding: 24px; }
.card { background: #fff; border: 1px solid #e5e7eb; border-radius: 14px; padding: 18px; margin-bottom: 16px; box-shadow: 0 1px 2px rgba(0,0,0,.04); }
h1, h2 { margin: 0 0 12px; }
.muted { color: #6b7280; }
.hidden { display: none; }
label { display: block; margin: 10px 0; font-weight: 600; }
input { width: 100%; padding: 12px; margin-top: 6px; border: 1px solid #d1d5db; border-radius: 10px; font-size: 16px; }
button { border: 0; background: #111827; color: white; padding: 12px 16px; border-radius: 10px; font-weight: 700; cursor: pointer; }
button:hover { opacity: .9; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.join { display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.status { margin-top: 10px; color: #374151; min-height: 22px; }
video { width: 100%; max-height: 70vh; background: #0b1020; border-radius: 12px; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.sessions { display: grid; gap: 8px; }
.session { display: grid; grid-template-columns: 110px 1fr auto; gap: 10px; align-items: center; padding: 10px; border: 1px solid #e5e7eb; border-radius: 10px; }
.badge { display: inline-block; padding: 4px 8px; border-radius: 999px; background: #eef2ff; color: #3730a3; font-size: 12px; }
pre { max-height: 280px; overflow: auto; background: #111827; color: #d1d5db; padding: 12px; border-radius: 10px; }
@media (max-width: 700px) { .join, .session { grid-template-columns: 1fr; } .topbar { align-items: flex-start; flex-direction: column; gap: 10px; } }