* {
  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: 700px;
}

.back {
  display: inline-block;
  font-size: 0.85rem;
  color: #6c63ff;
  text-decoration: none;
  margin-bottom: 1rem;
}

.back:hover {
  text-decoration: underline;
}

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

.subtitle {
  font-size: 0.85rem;
  color: #888;
  margin-bottom: 0.3rem;
}

.keeps {
  font-size: 0.8rem;
  color: #666;
  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;
}

.hidden {
  display: none;
}

.actions {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

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 {
  background: #5a52d5;
}

button.secondary {
  background: rgba(255, 255, 255, 0.08);
}

button.secondary:hover {
  background: rgba(255, 255, 255, 0.14);
}

.toast {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  background: #4caf50;
  color: #fff;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: opacity 0.3s;
}

.preview {
  background: #fff;
  color: #222;
  border-radius: 8px;
  padding: 1.5rem;
  max-height: 70vh;
  overflow-y: auto;
  line-height: 1.6;
  font-size: 0.95rem;
}

.preview h1, .preview h2, .preview h3, .preview h4 {
  color: #111;
  margin: 1rem 0 0.5rem;
}

.preview h1:first-child, .preview h2:first-child {
  margin-top: 0;
}

.preview p {
  margin-bottom: 0.75rem;
}

.preview a {
  color: #6c63ff;
}

.preview ul, .preview ol {
  margin: 0.5rem 0 0.75rem 1.5rem;
}

.preview table {
  border-collapse: collapse;
  margin: 0.75rem 0;
  width: 100%;
}

.preview td, .preview th {
  border: 1px solid #ddd;
  padding: 0.4rem 0.6rem;
  text-align: left;
}

.preview img {
  max-width: 100%;
  height: auto;
}

.error {
  background: rgba(244, 67, 54, 0.1);
  border: 1px solid #f44336;
  color: #f44336;
  padding: 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
}