.post-body table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    margin: 24px 0 32px;
    background: #fff;
    border: 1px solid var(--rule-soft);
    border-radius: 10px;
    overflow: hidden;
  }
  .post-body thead { background: var(--paper-warm); }
  .post-body th, .post-body td {
    padding: 12px 16px;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--rule-soft);
  }
  .post-body th {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink);
    font-weight: 500;
  }
  .post-body tr:last-child td { border-bottom: 0; }
  .post-body code {
    background: var(--paper-soft);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--mono);
    font-size: 0.88em;
    color: var(--ink);
  }
  .post-body figure.diagram {
    margin: 32px 0;
  }
  .post-body figure.diagram .diagram-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 160px;
    padding: 32px 24px;
    background: var(--paper-soft);
    border: 1px dashed var(--rule);
    border-radius: 10px;
    color: var(--ink-50);
    font-size: 13px;
    text-align: center;
    font-style: italic;
    font-family: var(--mono);
    letter-spacing: 0.04em;
  }