:root {
  --bg: #0c0f1a;
  --surface: #161b2e;
  --surface-hover: #1c2340;
  --border: #2a3152;
  --text: #e8ecf4;
  --text-muted: #7b84a3;
  --primary: #4f7df9;
  --primary-hover: #3b6af0;
  --primary-glow: rgba(79, 125, 249, 0.15);
  --danger: #f04848;
  --success: #34d399;
  --warning: #f59e0b;
  --radius: 14px;
  --radius-sm: 8px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans TC', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 2rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  border-radius: 14px;
  font-size: 0.875rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: white;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* Card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

/* Step Header */
.step-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.step-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--primary);
  border-radius: 50%;
  font-size: 0.8125rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.step-header h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
}

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

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

.required {
  color: var(--danger);
}

.hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

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

@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
}

select, input[type="text"], textarea {
  width: 100%;
  padding: 0.625rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9375rem;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

select:focus, input[type="text"]:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

textarea {
  resize: vertical;
  min-height: 60px;
}

.input-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.input-row input, .input-row select {
  flex: 1;
}

.checkbox-group {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.5rem;
}

.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--text);
  cursor: pointer;
  padding: 0.375rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: background 0.1s;
}

.checkbox-group label:hover {
  background: var(--surface-hover);
}

.check-label {
  display: flex !important;
  align-items: center !important;
  gap: 0.5rem !important;
  font-size: 0.8125rem !important;
  color: var(--text) !important;
  cursor: pointer;
}

/* Buttons */
.btn {
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: var(--surface-hover);
  color: var(--text);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
  background: var(--border);
  color: var(--text);
  border-radius: 6px;
}
.btn-sm:hover { background: var(--surface-hover); }

.btn-full { width: 100%; }

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

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

.btn-row {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

/* Broadcast Info */
.broadcast-info {
  margin-bottom: 0;
}

.broadcast-info h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
}

.info-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

.info-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 1rem 0;
}

/* Status */
.status-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.status-dot.live {
  background: var(--success);
  animation: pulse 1.5s ease-in-out infinite;
}

.status-dot.ready {
  background: var(--warning);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.badge {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0.25rem 0.625rem;
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: auto;
}

/* Share */
.share-section {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.qr-container {
  text-align: center;
}

.qr-container img {
  width: 140px;
  height: 140px;
  border-radius: var(--radius-sm);
  background: white;
  padding: 4px;
}

.qr-container p {
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin-top: 0.375rem;
}

.links {
  flex: 1;
  min-width: 220px;
}

/* Transcript */
.transcript-area h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.transcript-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  min-height: 180px;
  max-height: 350px;
  overflow-y: auto;
  font-size: 0.9375rem;
  line-height: 1.75;
}

.transcript-line {
  margin-bottom: 0.375rem;
  padding: 0.125rem 0;
}

.transcript-line.interim {
  color: var(--text-muted);
  font-style: italic;
}

.controls {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.controls .btn {
  flex: 1;
}

/* Advanced settings */
.advanced-settings {
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
}

.advanced-settings summary {
  cursor: pointer;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-weight: 500;
  user-select: none;
}

.advanced-settings[open] summary {
  margin-bottom: 0.75rem;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--text);
  cursor: pointer;
}

.volume-meter {
  width: 100%;
  height: 6px;
  background: var(--bg);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 0.25rem;
}

.volume-bar {
  height: 100%;
  width: 0%;
  background: var(--success);
  border-radius: 3px;
  transition: width 0.1s;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }