* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #111;
  color: #f5f5f5;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

main {
  width: 100%;
  max-width: 720px;
  padding: 24px;
}

#join-screen {
  text-align: center;
}

h1 {
  font-size: 28px;
  margin-bottom: 24px;
}

.status {
  min-height: 24px;
  font-size: 16px;
  color: #ffb4b4;
}

.btn {
  font-size: 20px;
  padding: 16px 32px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  margin: 6px;
  min-width: 160px;
}

.btn-primary {
  background: #3a8dff;
  color: #fff;
}

.btn-danger {
  background: #e5484d;
  color: #fff;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#video-area {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin: 16px 0;
}

.video-tile,
#remote-videos {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

video {
  width: 320px;
  max-width: 100%;
  border-radius: 12px;
  background: #000;
}

#controls {
  text-align: center;
  margin-top: 16px;
}

#debug-panel {
  margin: 16px auto 0;
  max-width: 480px;
  padding: 12px;
  background: #000;
  border: 1px solid #333;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.5;
  text-align: left;
  white-space: pre-wrap;
  color: #7fffa0;
}

@media (max-width: 480px) {
  .btn {
    display: block;
    width: 100%;
  }
}