/* TechTools — pdf-split styles [v2.1 §4.2 D3] */
.drop-zone {
  border: 2px dashed rgba(255,255,255,0.15);
  border-radius: 12px;
  padding: 40px 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.25s ease, background 0.25s ease;
}
.drop-zone.dragover {
  border-color: var(--accent-doc);
  background: rgba(6,182,212,0.06);
}
.drop-zone p { margin-bottom: 12px; }
.drop-zone .file-name {
  margin-top: 12px;
  font-size: 12px;
  color: var(--accent-doc);
  word-break: break-all;
}
.split-section {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  padding: 20px 24px;
  margin-top: 20px;
}
.split-section h3 {
  font-family: var(--font-hero);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.tool-input {
  width: 100%;
  padding: 10px 14px;
  border-radius: 8px;
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
  transition: border-color 0.25s ease;
}
.tool-input:focus { border-color: var(--accent-doc); }
.tool-input::placeholder { color: var(--text-muted); }
.split-preview {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  min-height: 20px;
}
.split-preview.error { color: var(--accent-rose); }
.pdf-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}
.split-results {
  margin-top: 24px;
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 20px 24px;
}
.split-results h3 {
  font-family: var(--font-hero);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 14px;
}
.download-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text-primary);
}
.tool-info-section code {
  font-family: 'SF Mono','Fira Code','Consolas',monospace;
  font-size: 12px;
  color: var(--accent-doc);
  background: rgba(0,0,0,0.25);
  padding: 1px 6px;
  border-radius: 4px;
}