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

:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --background: #f8fafc;
  --surface: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --success: #22c55e;
  --error: #ef4444;
  --warning: #f59e0b;

  /* Speaker colors */
  --speaker-justin: #3b82f6;
  --speaker-betsey: #8b5cf6;
  --speaker-interviewer: #10b981;
  --speaker-other: #6b7280;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

.app-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

/* Header */
header {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

header h1 {
  font-size: 2rem;
  color: var(--primary-color);
}

header .subtitle {
  color: var(--text-secondary);
  flex: 1;
}

.version-footer {
  position: fixed;
  bottom: 12px;
  right: 16px;
  color: var(--text-secondary);
  font-size: 0.7rem;
  opacity: 0.7;
}

/* Sections */
.section {
  background: var(--surface);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.section h2 {
  margin-bottom: 16px;
  font-size: 1.25rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.section-header h2 {
  margin-bottom: 0;
}

.hidden {
  display: none !important;
}

/* Buttons */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

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

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

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

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

.btn-icon {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-icon:hover {
  background: var(--background);
  color: var(--text-primary);
  border-color: var(--primary-color);
}

.btn-icon .icon {
  font-size: 1rem;
}

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

.btn-icon.btn-danger {
  color: var(--error);
  border-color: var(--error);
}

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

/* Drop Zone */
.drop-zone {
  border: 2px dashed var(--border-color);
  border-radius: 12px;
  padding: 60px 40px;
  text-align: center;
  transition: all 0.2s;
}

.drop-zone.dragover {
  border-color: var(--primary-color);
  background: rgba(37, 99, 235, 0.05);
}

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.drop-icon {
  font-size: 3rem;
}

.or-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.file-types {
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-top: 8px;
}

.file-input-label {
  cursor: pointer;
}

/* Upload Progress */
.upload-progress {
  margin-top: 20px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary-color);
  width: 0%;
  transition: width 0.3s;
}

.progress-text {
  display: block;
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Video/Audio Player */
.video-container {
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 12px;
}

#video-player {
  width: 100%;
  max-height: 500px;
}

.audio-container {
  margin-bottom: 12px;
}

#audio-player {
  width: 100%;
}

.video-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  flex-wrap: wrap;
  gap: 8px;
}

#video-name {
  font-weight: 500;
  color: var(--text-primary);
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.video-meta .separator {
  color: var(--border-color);
}

/* Processing Status */
.processing-status {
  display: flex;
  gap: 20px;
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--background);
  border-radius: 8px;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.status-item::before {
  content: '';
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--warning);
  animation: pulse 1.5s infinite;
}

.status-item.complete::before {
  background: var(--success);
  animation: none;
}

.status-item.error::before {
  background: var(--error);
  animation: none;
}

.status-item.complete {
  color: var(--success);
}

.status-item.error {
  color: var(--error);
}

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

/* Loading */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 40px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Transcript */
.transcript-container {
  max-height: 600px;
  overflow-y: auto;
  padding: 16px;
  background: var(--background);
  border-radius: 8px;
}

.transcript-segment {
  margin-bottom: 16px;
  padding: 12px;
  border-radius: 8px;
  background: var(--surface);
  border-left: 4px solid var(--speaker-other);
  cursor: pointer;
  transition: background 0.15s;
}

.transcript-segment:hover {
  background: #f1f5f9;
}

.transcript-segment.justin-wolfers {
  border-left-color: var(--speaker-justin);
}

.transcript-segment.betsey-stevenson {
  border-left-color: var(--speaker-betsey);
}

.transcript-segment.interviewer {
  border-left-color: var(--speaker-interviewer);
}

.transcript-segment .speaker {
  font-weight: 600;
  margin-bottom: 4px;
}

.transcript-segment.justin-wolfers .speaker {
  color: var(--speaker-justin);
}

.transcript-segment.betsey-stevenson .speaker {
  color: var(--speaker-betsey);
}

.transcript-segment.interviewer .speaker {
  color: var(--speaker-interviewer);
}

.transcript-segment .timestamp {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-left: 8px;
  font-weight: 400;
}

.transcript-segment .text {
  color: var(--text-primary);
}

.transcript-segment .text p {
  margin-bottom: 0.75em;
}

.transcript-segment .text p:last-child {
  margin-bottom: 0;
}

/* Error states */
.extraction-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  text-align: center;
  width: 100%;
}

.extraction-error .error {
  color: var(--error);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.billing-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  text-align: center;
  width: 100%;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 8px;
  margin: 20px 0;
}

.billing-error .error {
  color: var(--error);
  margin-bottom: 16px;
  font-size: 1rem;
  font-weight: 500;
}

.billing-error .btn {
  margin-top: 8px;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    flex-wrap: wrap;
  }

  .video-info {
    flex-direction: column;
    align-items: flex-start;
  }
}