* { box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; margin: 0; background: #f4f6f8; color: #1a1a1a; }
header { background: #0f172a; color: white; padding: 12px 24px; display: flex; align-items: center; justify-content: space-between; }
header h1 { margin: 0; font-size: 18px; }
main { padding: 24px; display: grid; grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); gap: 16px; max-width: 1600px; margin: 0 auto; }
.card { background: white; border-radius: 8px; padding: 16px; box-shadow: 0 1px 3px rgba(0,0,0,.08); }
#log { grid-column: 1 / -1; }
.card h2 { margin: 0 0 12px; font-size: 14px; text-transform: uppercase; letter-spacing: .04em; color: #64748b; }
label { display: block; margin-bottom: 10px; font-size: 13px; color: #334155; }
input { display: block; width: 100%; padding: 8px 10px; border: 1px solid #cbd5e1; border-radius: 6px; font-size: 13px; margin-top: 4px; }
button { background: #2563eb; color: white; border: 0; padding: 8px 14px; border-radius: 6px; cursor: pointer; font-size: 13px; margin-right: 6px; }
button:disabled { background: #94a3b8; cursor: not-allowed; }
button.danger { background: #dc2626; }
.badge { background: #475569; color: white; padding: 4px 10px; border-radius: 999px; font-size: 12px; }
.badge.ok { background: #16a34a; }
.badge.bad { background: #dc2626; }
ul#participants { list-style: none; padding: 0; margin: 0; }
ul#participants li { padding: 10px; border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; display: flex; align-items: center; justify-content: space-between; font-size: 13px; }
li .kind-sip { background: #fef3c7; color: #92400e; padding: 2px 8px; border-radius: 999px; font-size: 11px; margin-left: 8px; }
li .kind-standard { background: #dbeafe; color: #1e40af; padding: 2px 8px; border-radius: 999px; font-size: 11px; margin-left: 8px; }
li .audio-level { width: 80px; height: 6px; background: #e2e8f0; border-radius: 3px; overflow: hidden; }
li .audio-level > span { display: block; height: 100%; background: #16a34a; width: 0%; transition: width .1s; }
pre#log-out { background: #0f172a; color: #e2e8f0; padding: 16px; border-radius: 6px; min-height: 360px; max-height: 70vh; overflow: auto; font-size: 13px; line-height: 1.55; margin: 0; white-space: pre-wrap; word-break: break-word; font-family: ui-monospace, Menlo, Consolas, monospace; }
#log h2 { display: flex; align-items: center; justify-content: space-between; }
#log .log-actions button { font-size: 11px; padding: 4px 8px; background: #475569; }