* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-dark: #0f0f14;
  --bg-card: #1a1a24;
  --border: #2d2d3a;
  --text: #e4e4e7;
  --text-muted: #71717a;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
}

body {
  font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  background: var(--bg-dark);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem;
}

.header {
  margin-bottom: 2rem;
}

.header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.media-hint {
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: rgba(245, 158, 11, 0.12);
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--warning);
}

section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

section h2 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-weight: 500;
}

.form-group {
  margin-bottom: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
}

input, select {
  width: 100%;
  padding: 0.6rem 0.8rem;
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.btn {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--border);
  color: var(--text);
}

.btn-secondary:hover:not(:disabled) {
  background: #3d3d4a;
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover:not(:disabled) {
  background: #16a34a;
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

.status {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.status.connected { color: var(--success); }
.status.registered { color: var(--success); }
.status.ringing { color: var(--warning); }
.status.in-call { color: var(--accent); }

.video-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.video-box {
  background: var(--bg-dark);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.video-box label {
  display: block;
  padding: 0.5rem 0.8rem;
  background: var(--bg-card);
  font-size: 0.8rem;
}

.video-box video {
  width: 100%;
  height: 180px;
  display: block;
  background: #000;
}

.verbose-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
}

.verbose-toggle input {
  cursor: pointer;
}

#log {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1rem;
  font-size: 0.8rem;
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--text-muted);
}