/* Truth table */
  .truth-table-wrap { flex: 1; padding: 0 18px 16px; padding-top: 12px; }
  .tt-label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 8px; }
  table.tt {
    width: 100%; border-collapse: collapse; font-size: 12px; font-family: var(--mono);
  }
  table.tt th {
    color: var(--text-muted); font-weight: 600; text-align: center;
    padding: 5px 8px; border-bottom: 1px solid var(--border);
    letter-spacing: .04em; font-size: 11px;
  }
  table.tt td {
    text-align: center; padding: 5px 8px; color: var(--blue-dim);
    transition: color .15s, background .15s;
    border-radius: 4px;
  }
  table.tt tr.active td { color: var(--text-primary); }
  table.tt tr.active td:last-child { color: var(--green); font-weight: 700; }
  table.tt tr.active { background: rgba(34,211,110,0.06); }

  /* Gate description */
  .gate-desc {
    padding: 10px 18px 14px; font-size: 12px; color: var(--text-muted);
    line-height: 1.5; border-top: 1px solid var(--border);
  }
  .expr {
    font-family: var(--mono); color: var(--text-primary);
    background: rgba(79,142,247,0.1); padding: 1px 6px; border-radius: 4px;
    font-size: 11px;
  }