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

:root {
  --primary: #7c5aa8;
  --primary-dark: #6a4b90;
  --bg: #faf9fb;
  --card: #ffffff;
  --text: #1f2937;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
}

/* Upload Area */
.upload-area {
  background: var(--card);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  margin: 2rem 0;
  transition: all 0.3s ease;
  cursor: pointer;
}

.upload-area:hover {
  border-color: var(--primary);
  background: #faf5ff;
}

.upload-area.dragover {
  border-color: var(--primary);
  background: #faf5ff;
  transform: scale(1.02);
}

.upload-area.loading {
  opacity: 0.7;
  pointer-events: none;
}

.upload-icon {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.upload-area h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.upload-area p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-download, .btn-remove {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
  background: var(--card);
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-secondary:hover:not(:disabled) {
  background: #faf5ff;
}

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

.btn-download {
  background: var(--primary);
  color: white;
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

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

.btn-remove {
  background: transparent;
  color: var(--text-muted);
  padding: 0.5rem;
  border-radius: 6px;
}

.btn-remove:hover {
  background: #fee2e2;
  color: var(--error);
}

/* Controls Panel */
.controls-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1rem 0 2rem;
}

.control-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.control-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.control-header h4 {
  color: var(--text);
  font-size: 0.95rem;
}

.control-group {
  margin-bottom: 0;
}

.control-group label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 0.5rem;
  gap: 0.75rem;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.control-row input[type="range"] {
  flex: 1;
  accent-color: var(--primary);
}

.control-value {
  font-weight: 700;
  color: var(--primary);
  min-width: 60px;
  text-align: right;
  font-size: 0.9rem;
}

.control-help {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 0.35rem;
}

/* Videos Grid */
.videos-grid {
  margin: 2rem 0;
  display: none;
}

.videos-grid.visible {
  display: block;
}

.grid-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.grid-header h3 {
  font-size: 1.25rem;
  color: var(--text);
}

.videos-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

/* Video Card */
.video-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.video-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.video-info {
  margin-bottom: 1rem;
}

.video-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.25rem 0 0.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  background: #f3f4f6;
  color: var(--text);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
}

.video-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.video-meta {
  display: flex;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.video-status {
  margin-bottom: 1rem;
}

.status-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--primary);
  transition: width 0.3s ease;
  border-radius: 3px;
}

.video-logs {
  background: #f9fafb;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  color: var(--text-muted);
  max-height: 120px;
  overflow-y: auto;
  margin: 0.5rem 0 0.75rem;
}

.video-logs div {
  margin-bottom: 0.25rem;
}

.video-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.video-actions .btn-download {
  flex: 1;
}

/* Branding Badge */
.branding-badge {
  margin: 3rem 0 2rem;
  text-align: center;
  color: var(--text);
  font-weight: 600;
}

.branding-badge a {
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
  transition: color 0.2s ease;
}

.branding-badge a:hover {
  color: var(--primary-dark);
}

/* Notifications */
.notification {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-lg);
  max-width: 400px;
  opacity: 0;
  transform: translateY(1rem);
  transition: all 0.3s ease;
  z-index: 1000;
}

.notification.show {
  opacity: 1;
  transform: translateY(0);
}

.notification-success {
  border-left: 4px solid var(--success);
}

.notification-error {
  border-left: 4px solid var(--error);
}

.notification-info {
  border-left: 4px solid var(--primary);
}

/* Responsive */
@media (max-width: 768px) {
  .upload-area {
    padding: 2rem 1rem;
  }

  .videos-list {
    grid-template-columns: 1fr;
  }

  .grid-header {
    flex-direction: column;
    align-items: stretch;
  }

  .control-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .control-value {
    min-width: 0;
  }

  .notification {
    right: 1rem;
    left: 1rem;
    max-width: none;
  }
}

@media (max-width: 640px) {
  body {
    padding: 1rem 0.5rem;
  }

  .branding-badge {
    margin: 2rem 0 1.5rem;
    font-size: 0.95rem;
  }

  .video-card {
    padding: 1rem;
  }
}