:root {
  color-scheme: dark;
  --bg: #0f172a;
  --panel: #172033;
  --panel-strong: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --danger: #fb7185;
  --border: #334155;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 32rem), var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

button {
  border: 0;
  border-radius: 0.75rem;
  padding: 0.8rem 1rem;
  background: var(--accent);
  color: #082f49;
  cursor: pointer;
  font-weight: 700;
}

button:hover,
button:focus-visible {
  background: var(--accent-strong);
  color: white;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 0.8rem 1rem;
  background: #020617;
  color: var(--text);
}

small,
#status,
.video-header span,
.empty {
  color: var(--muted);
}

.site-header,
main {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  padding: 3rem 0 1.5rem;
}

.site-header h1 {
  margin: 0;
  font-size: clamp(2.2rem, 7vw, 4.5rem);
  line-height: 0.95;
}

.site-header p {
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.1rem;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 1.25rem;
  background: rgba(23, 32, 51, 0.86);
  box-shadow: 0 24px 80px rgba(2, 6, 23, 0.28);
}

.room-form {
  display: grid;
  gap: 0.75rem;
  max-width: 44rem;
}

.room-form button {
  justify-self: start;
  margin-top: 0.35rem;
}

.error {
  color: var(--danger);
  min-height: 1.5rem;
}

.room-panel {
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
}

.room-panel h2,
.room-panel p {
  margin: 0.2rem 0;
}

.share-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

#stop-share {
  background: var(--danger);
  color: #fff1f2;
}

.video-section {
  display: grid;
  gap: 1rem;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 26rem), 1fr));
  gap: 1rem;
}

.video-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  background: var(--panel-strong);
}

.video-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
}

video {
  display: block;
  width: 100%;
  min-height: 14rem;
  max-height: 72vh;
  object-fit: contain;
  background: #020617;
}

.local-card video:not([srcObject]) {
  min-height: 10rem;
}

.empty {
  margin: 0;
  padding: 1.25rem;
  border: 1px dashed var(--border);
  border-radius: 1.25rem;
}

.log-panel {
  margin: 1rem 0 2rem;
}

#log {
  margin-bottom: 0;
  padding-left: 1.5rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .share-row {
    grid-template-columns: 1fr;
  }
}