/* TechTools — text-diff styles (auto-extracted) */
.diff-header {
    display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px;
  }
  .diff-label {
    font-size: 14px; font-weight: 600; color: var(--text-secondary);
    display: flex; align-items: center; gap: 8px;
  }
  .diff-label.original::before {
    content: ''; display: inline-block; width: 12px; height: 12px;
    border-radius: 3px; background: rgba(255,77,109,0.5);
  }
  .diff-label.modified::before {
    content: ''; display: inline-block; width: 12px; height: 12px;
    border-radius: 3px; background: rgba(19,221,196,0.5);
  }
  .diff-output {
    background: rgba(0,0,0,0.25);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px; padding: 16px; min-height: 200px;
    max-height: 500px; overflow-y: auto;
    font-family: 'SF Mono','Fira Code','Consolas','Courier New',monospace;
    font-size: 13px; line-height: 1.6; white-space: pre-wrap;
    word-break: break-all;
  }
  .diff-line {
    padding: 2px 12px; border-radius: 4px; margin: 1px 0;
  }
  .diff-line.added {
    background: rgba(19,221,196,0.12); color: var(--accent-teal);
  }
  .diff-line.removed {
    background: rgba(255,77,109,0.12); color: var(--accent-rose);
  }
  .diff-line.same {
    color: var(--text-secondary);
  }
  .diff-line .line-prefix {
    display: inline-block; width: 24px; text-align: right;
    margin-right: 12px; color: var(--text-muted); font-size: 11px;
    user-select: none;
  }
  .diff-stats {
    text-align: center; font-size: 14px; color: var(--text-secondary);
    padding: 8px 0; min-height: 24px;
  }
  .diff-stats .added-count { color: var(--accent-teal); font-weight: 600; }
  .diff-stats .removed-count { color: var(--accent-rose); font-weight: 600; }
  .diff-stats .same-count { color: var(--text-secondary); font-weight: 600; }