:root {
  color-scheme: dark;
  --bg: #0f1115;
  --panel: #171a21;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --accent: #5b9cf5;
  --border: #2a2f3a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.layout {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.panel {
  margin-top: 20px;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

label {
  display: grid;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

input {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0b0d11;
  color: var(--text);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

button {
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #222733;
  color: var(--text);
  cursor: pointer;
}

button:hover:not(:disabled) {
  border-color: var(--accent);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.status {
  margin: 12px 0 0;
  color: var(--accent);
}

.hint {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.hint.warn strong {
  color: #e8b84a;
}

.video-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.video-grid video {
  width: 100%;
  background: #000;
  border-radius: 8px;
  aspect-ratio: 16 / 9;
}

#localPreview {
  width: 100%;
  max-width: 640px;
  background: #000;
  border-radius: 8px;
}

.log {
  margin: 0;
  min-height: 120px;
  max-height: 240px;
  overflow: auto;
  padding: 12px;
  background: #0b0d11;
  border-radius: 8px;
  font-size: 0.8rem;
  line-height: 1.4;
}