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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #1a1a2e;
  color: #e0e0e0;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem;
}

.container {
  width: 100%;
  max-width: 560px;
}

h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
}

.subtitle {
  font-size: 0.85rem;
  color: #888;
  margin-bottom: 1.5rem;
}

.drop-zone {
  border: 2px dashed #444;
  border-radius: 10px;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  margin-bottom: 1rem;
  position: relative;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: #6c63ff;
  background: rgba(108, 99, 255, 0.05);
}

.drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-zone .browse {
  color: #6c63ff;
  text-decoration: underline;
}

.drop-zone .formats {
  font-size: 0.75rem;
  color: #666;
  margin-top: 0.5rem;
}

.file-list-preview {
  margin-bottom: 1rem;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 8px;
  font-size: 0.85rem;
}

.file-list-preview .file-entry {
  padding: 0.25rem 0;
  color: #ccc;
}

.hidden {
  display: none;
}

.settings {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 8px;
}

.setting {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.setting label {
  font-size: 0.8rem;
  color: #aaa;
}

.setting input[type="number"] {
  width: 100px;
  padding: 0.4rem 0.6rem;
  background: #16213e;
  border: 1px solid #333;
  border-radius: 4px;
  color: #e0e0e0;
  font-size: 0.9rem;
}

button {
  background: #6c63ff;
  color: #fff;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

button:hover:not(:disabled) {
  background: #5a52d5;
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.button-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

#convert {
  flex: 1;
  padding: 0.75rem;
  font-size: 1rem;
}

.abort-btn {
  padding: 0.75rem 1.2rem;
  font-size: 1rem;
  background: #d32f2f;
}

.abort-btn:hover:not(:disabled) {
  background: #b71c1c;
}

.loading {
  text-align: center;
  padding: 1rem;
  color: #6c63ff;
  font-size: 0.9rem;
}

.progress-area {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 8px;
  padding: 1rem;
}

.file-item {
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.85rem;
}

.file-item:last-child {
  border-bottom: none;
}

.file-item .filename {
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.file-item .status {
  color: #888;
  font-size: 0.8rem;
}

.file-item .status.done {
  color: #4caf50;
}

.file-item .status.error {
  color: #f44336;
}

.file-item .status.converting {
  color: #6c63ff;
}

.file-item .progress-bar {
  height: 3px;
  background: #333;
  border-radius: 2px;
  margin-top: 0.3rem;
  overflow: hidden;
}

.file-item .progress-bar .fill {
  height: 100%;
  background: #6c63ff;
  border-radius: 2px;
  transition: width 0.3s;
}

.file-item .progress-bar .fill.pulse {
  width: 100% !important;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

.file-item .download-link {
  display: inline-block;
  margin-top: 0.3rem;
  color: #6c63ff;
  text-decoration: none;
  font-size: 0.8rem;
}

.file-item .download-link:hover {
  text-decoration: underline;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: #aaa;
  cursor: pointer;
  margin-top: 0.25rem;
}

.checkbox input {
  accent-color: #6c63ff;
}

.source-fps {
  font-weight: 400;
  color: #666;
  font-size: 0.75rem;
}

.summary {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-weight: 600;
  font-size: 0.9rem;
  color: #4caf50;
}