:root {
  --bg-color: #121316;
  --card-bg: #1c1e24;
  --card-border: #2e323b;
  --accent-color: #3b82f6;
  --accent-hover: #2563eb;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --drop-hover: #1e293b;
  --success-color: #10b981;
  --radius: 12px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 24px;
}

.container {
  width: 100%;
  max-width: 720px;
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

header {
  text-align: center;
  margin-bottom: 28px;
}

header h1 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.drop-zones {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

@media (max-width: 600px) {
  .drop-zones {
    grid-template-columns: 1fr;
  }
}

.drop-zone {
  border: 2px dashed var(--card-border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background-color: rgba(255, 255, 255, 0.02);
}

.drop-zone.dragover {
  border-color: var(--accent-color);
  background-color: var(--drop-hover);
}

.drop-zone.active {
  border-color: var(--success-color);
}

.drop-zone .icon {
  font-size: 2.2rem;
  display: block;
  margin-bottom: 8px;
}

.drop-zone h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.drop-zone .file-name {
  font-size: 0.85rem;
  color: var(--text-muted);
  word-break: break-word;
}

.preview-panel {
  text-align: center;
  margin-bottom: 20px;
}

.preview-panel img {
  max-width: 180px;
  max-height: 180px;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  object-fit: cover;
}

.action-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.btn {
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.2s ease;
}

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

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

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

.progress-container {
  width: 100%;
  text-align: center;
}

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

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background-color: var(--accent-color);
  transition: width 0.2s ease;
}

.status-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.result-panel {
  border-top: 1px solid var(--card-border);
  padding-top: 24px;
  text-align: center;
}

.result-panel h2 {
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.video-wrapper {
  margin-bottom: 16px;
}

.video-wrapper video {
  max-width: 100%;
  border-radius: 8px;
  background-color: #000;
}

.download-btn {
  background-color: var(--success-color);
  color: #fff;
  display: inline-block;
}

.download-btn:hover {
  background-color: #059669;
}