/* ── Split Tool Styles ────────────────────────────────────────────────── */

/* Split mode selector */
.split-mode-row {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.split-mode-btn {
  flex: 1;
  padding: 12px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
}

.split-mode-btn:hover {
  border-color: var(--accent-blue);
  background: #0d2240;
}

.split-mode-btn.active {
  border-color: var(--accent-blue);
  background: var(--accent-blue-dim);
}

.split-mode-desc {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
  display: block;
  margin-top: 4px;
}

/* Page range input */
.range-input-group {
  margin-bottom: 16px;
}

.range-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 6px;
  display: block;
}

.range-input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.range-input:focus {
  border-color: var(--accent-blue);
}

.range-input::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

.range-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
  opacity: 0.7;
}

/* Thumbnail grid for page selection */
.thumb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.thumb-card {
  position: relative;
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: 6px;
  padding: 6px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  text-align: center;
}

.thumb-card:hover {
  border-color: var(--accent-blue);
}

.thumb-card.selected {
  border-color: var(--accent-blue);
  background: var(--accent-blue-dim);
}

.thumb-card canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 3px;
}

.thumb-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.thumb-card.selected .thumb-label {
  color: var(--text-primary);
}

.thumb-check {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-blue);
  color: white;
  font-size: 12px;
  display: none;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.thumb-card.selected .thumb-check {
  display: flex;
}

/* Selection helpers */
.select-helpers {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.select-helper-btn {
  padding: 5px 12px;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 12px;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}

.select-helper-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

/* Split results */
.split-results {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

.split-result-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px 14px;
}

.split-result-info {
  font-size: 13px;
  color: var(--text-primary);
  font-weight: 600;
}

.split-result-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
  font-weight: 400;
}

.split-result-dl {
  padding: 6px 14px;
  background: var(--accent-blue);
  border: none;
  border-radius: 5px;
  color: white;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  flex-shrink: 0;
}

.split-result-dl:hover {
  background: #2563eb;
}

/* Loading thumbnails */
.thumb-loading {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 13px;
}