.tool-ui { display: flex; flex-direction: column; gap: 1.25rem; }

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 2.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: var(--surface);
}
.drop-zone.drag-over { border-color: var(--accent); background: var(--accent-dim); }
.file-label { color: var(--accent); cursor: pointer; text-decoration: underline; }

.doc-info-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
}
.doc-meta { display: flex; flex-direction: column; gap: 0.25rem; }
.doc-name { font-weight: 600; color: var(--snow); font-size: 0.95rem; }
.doc-details { font-size: 0.8rem; color: var(--muted); }

.controls-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

.pages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  max-height: 500px;
  overflow-y: auto;
  padding: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}

.page-thumb-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  background: var(--ink);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  position: relative;
}

.page-thumb-preview {
  width: 110px;
  height: 140px;
  background: #252836;
  border: 1px solid var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.85rem;
  position: relative;
  overflow: hidden;
}

.page-thumb-preview canvas {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform 0.2s ease;
}

.page-number {
  font-size: 0.8rem;
  color: var(--snow);
  font-family: 'JetBrains Mono', monospace;
}

.rotate-page-btn {
  background: var(--surface);
  color: var(--snow);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
}
.rotate-page-btn:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
}

.btn-primary {
  background: var(--accent); color: white;
  border: none; border-radius: 8px;
  padding: 0.75rem 1.5rem; font-size: 0.95rem;
  cursor: pointer; font-family: 'DM Sans', sans-serif; font-weight: 600;
  transition: opacity 0.2s;
}
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary:hover:not(:disabled) { opacity: 0.85; }

.btn-secondary {
  background: var(--surface); color: var(--snow);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 0.5rem 1rem; font-size: 0.85rem;
  cursor: pointer; font-family: 'Inter', sans-serif;
  transition: background 0.2s;
}
.btn-secondary:hover { background: var(--border); }

.ad-post-op {
  border: 1px solid var(--border);
  border-radius: 8px; padding: 1rem;
  font-size: 0.75rem; color: var(--muted); text-align: center;
}