:root {
  --bg: #0e1116;
  --card: #161b22;
  --fg: #e6edf3;
  --muted: #9aa7b3;
  --accent: #2ea043;
  --accent-2: #1f6feb;
  --danger: #da3633;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 -apple-system, Segoe UI, Roboto, sans-serif;
  padding: 20px;
}
.card {
  width: 100%;
  max-width: 420px;
  background: var(--card);
  border: 1px solid #21262d;
  border-radius: 16px;
  padding: 28px 24px;
  text-align: center;
}
h1 { font-size: 22px; margin: 0 0 4px; }
.sub { color: var(--muted); margin: 0 0 24px; font-size: 14px; }
.status {
  font-size: 15px;
  color: var(--muted);
  min-height: 22px;
  margin: 16px 0;
}
.status.connected { color: var(--accent); font-weight: 600; }
.status.ended { color: var(--danger); }
button {
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  margin-top: 10px;
}
.btn-call   { background: var(--accent); }
.btn-join   { background: var(--accent-2); }
.btn-hangup { background: var(--danger); }
button:disabled { opacity: .5; cursor: default; }
.link-box {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}
.link-box input {
  flex: 1;
  min-width: 0;
  background: #0d1117;
  border: 1px solid #30363d;
  color: var(--fg);
  border-radius: 8px;
  padding: 10px;
  font-size: 13px;
}
.link-box button { width: auto; margin: 0; padding: 10px 14px; background: #30363d; }
.hidden { display: none; }
.dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--muted); margin-right: 6px; vertical-align: middle;
}
.dot.live { background: var(--accent); animation: pulse 1.4s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .3; } }