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

[hidden] {
  display: none !important;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #f5f5ff;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
header {
  background: white;
  border-bottom: 1px solid #e8e8f0;
  padding: 0 32px;
  height: 52px;
  display: flex;
  align-items: center;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 16px;
  color: #1e1b4b;
}

/* Main layout */
main {
  display: flex;
  flex: 1;
  height: calc(100vh - 52px);
  overflow: hidden;
}

/* Left panel */
.left-panel {
  width: 260px;
  min-width: 260px;
  background: white;
  border-right: 1px solid #e8e8f0;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}

/* Upload zone */
.upload-zone {
  border: 2px dashed #c7d2fe;
  border-radius: 14px;
  padding: 28px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: #6366f1;
  background: #f5f3ff;
}

.upload-title {
  font-size: 15px;
  font-weight: 600;
  color: #1e1b4b;
  margin: 10px 0 12px;
}

.choose-btn {
  background: white;
  border: 1.5px solid #d1d5db;
  color: #374151;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.choose-btn:hover { border-color: #6366f1; color: #6366f1; }

/* File card */
.file-card {
  background: #6366f1;
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.file-info {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.file-name {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: white;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 140px;
}

.file-duration {
  display: block;
  font-size: 11px;
  color: #c7d2fe;
  margin-top: 2px;
}

.delete-btn {
  background: none;
  border: none;
  color: #c7d2fe;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  transition: color 0.2s;
}

.delete-btn:hover { color: white; }

/* Process button */
.process-btn {
  width: 100%;
  background: #6366f1;
  color: white;
  border: none;
  padding: 12px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.process-btn:hover { background: #4f46e5; }
.process-btn:disabled { background: #a5b4fc; cursor: not-allowed; }

/* Status */
#status {
  font-size: 13px;
  color: #6b7280;
  text-align: center;
}

#status.error { color: #dc2626; }
#status.success { color: #16a34a; }

/* Right panel */
.right-panel {
  flex: 1;
  padding: 28px 32px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

/* Empty state */
.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: #c7d2fe;
  font-size: 14px;
}

/* Player section */
.player-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.player-wrap {
  background: white;
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 2px 12px rgba(99,102,241,0.08);
}

audio {
  width: 100%;
  border-radius: 8px;
}

video {
  width: 100%;
  max-height: 60vh;
  object-fit: contain;
  border-radius: 8px;
  background: #000;
}

/* Toggle */
.toggle-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.toggle-label {
  font-size: 14px;
  font-weight: 500;
  color: #9ca3af;
}

.enhanced-label { color: #6366f1; font-weight: 600; }

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
}

.toggle-switch input { display: none; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: #e5e7eb;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s;
}

.toggle-slider:before {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  left: 3px;
  top: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

.toggle-switch input:checked + .toggle-slider { background: #6366f1; }
.toggle-switch input:checked + .toggle-slider:before { transform: translateX(22px); }

/* Control card */
.control-card {
  background: white;
  border-radius: 14px;
  padding: 16px 20px;
  box-shadow: 0 2px 12px rgba(99,102,241,0.06);
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.control-name {
  font-size: 14px;
  font-weight: 500;
  color: #374151;
}

.control-value {
  font-size: 13px;
  color: #6366f1;
  font-weight: 600;
}

input[type="range"] {
  width: 100%;
  accent-color: #6366f1;
  cursor: pointer;
}

.slider-hints {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: #9ca3af;
  margin-top: 6px;
}

/* Download button */
.download-btn {
  display: block;
  text-align: center;
  background: white;
  color: #6366f1;
  border: 1.5px solid #6366f1;
  padding: 12px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.download-btn:hover {
  background: #6366f1;
  color: white;
}

/* Responsive */
@media (max-width: 640px) {
  main { flex-direction: column; height: auto; }
  .left-panel { width: 100%; border-right: none; border-bottom: 1px solid #e8e8f0; }
}