.post-hero { padding: 96px 0 48px; }
  .post-hero .meta { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.12em; color: var(--tx-muted); display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
  .post-hero .meta .pcat { color: var(--ac-primary); }
  .post-hero h1 { font-family: var(--f-display); font-weight: 700; font-size: clamp(40px, 5.5vw, 64px); line-height: 1.1; letter-spacing: -0.025em; margin: 24px 0 24px; max-width: 18ch; }
  .post-hero p.lede { color: var(--tx-secondary); font-size: 20px; line-height: 1.55; max-width: 720px; }
  .author-row { margin-top: 40px; padding: 20px 0; border-top: 1px solid var(--bd-subtle); border-bottom: 1px solid var(--bd-subtle); display: flex; gap: 16px; align-items: center; font-family: var(--f-mono); font-size: 12px; }
  .author-row .av { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, rgba(63,224,197,0.4), rgba(91,255,168,0.2)); display: grid; place-items: center; font-weight: 600; color: #001a17; }
  .author-row .name { color: var(--tx-primary); font-family: var(--f-body); font-size: 14px; font-weight: 600; }
  .author-row .role { color: var(--tx-muted); font-size: 11px; letter-spacing: 0.06em; }
  .author-row .sep { color: var(--tx-muted); }
  .author-row .meta-r { margin-left: auto; color: var(--tx-muted); display: flex; gap: 16px; }

  /* Cover */
  .cover-art {
    margin-top: 40px;
    aspect-ratio: 16/7;
    background:
      repeating-linear-gradient(135deg, rgba(63,224,197,0.04) 0 1px, transparent 1px 8px),
      var(--bg-elev);
    border: 1px solid var(--bd-subtle);
    border-radius: 16px;
    position: relative;
    overflow: hidden;
  }
  .cover-art svg { position: absolute; inset: 0; width: 100%; height: 100%; }

  /* Article body */
  .article-wrap { display: grid; grid-template-columns: 240px 1fr; gap: 64px; padding: 80px 0; }
  @media (max-width: 1080px) { .article-wrap { grid-template-columns: 1fr; gap: 32px; } }
  .toc { position: sticky; top: 96px; align-self: start; height: max-content; }
  .toc h6 { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.12em; color: var(--tx-muted); margin-bottom: 14px; }
  .toc a { display: block; padding: 8px 12px; font-size: 13px; color: var(--tx-secondary); border-left: 1px solid var(--bd-subtle); transition: all 200ms; }
  .toc a:hover { color: var(--tx-primary); border-left-color: var(--ac-primary); }
  .toc a.active { color: var(--ac-primary); border-left-color: var(--ac-primary); }

  .article { max-width: 720px; }
  .article h2 { font-family: var(--f-display); font-weight: 700; font-size: 32px; line-height: 1.2; letter-spacing: -0.02em; margin: 48px 0 16px; scroll-margin-top: 80px; }
  .article h2 .num { font-family: var(--f-mono); color: var(--ac-primary); font-size: 14px; font-weight: 500; letter-spacing: 0.1em; display: block; margin-bottom: 8px; }
  .article h3 { font-family: var(--f-display); font-weight: 600; font-size: 22px; line-height: 1.3; letter-spacing: -0.01em; margin: 32px 0 12px; }
  .article p { color: var(--tx-secondary); font-size: 17px; line-height: 1.7; margin-bottom: 18px; }
  .article p strong { color: var(--tx-primary); font-weight: 600; }
  .article ul, .article ol { color: var(--tx-secondary); font-size: 17px; line-height: 1.7; margin: 0 0 24px 24px; }
  .article li { margin-bottom: 8px; }
  .article blockquote {
    border-left: 2px solid var(--ac-primary);
    padding: 6px 0 6px 24px;
    margin: 32px 0;
    font-family: var(--f-display);
    font-size: 22px; font-weight: 500;
    color: var(--tx-primary);
    line-height: 1.4;
    font-style: italic;
  }
  .article blockquote cite { display: block; margin-top: 12px; font-family: var(--f-mono); font-size: 12px; color: var(--tx-muted); font-style: normal; letter-spacing: 0.06em; }
  .article pre {
    background: var(--bg-base);
    border: 1px solid var(--bd-subtle);
    border-radius: 12px;
    padding: 20px 22px;
    overflow-x: auto;
    font-family: var(--f-mono); font-size: 12.5px;
    line-height: 1.6; color: var(--tx-primary);
    margin: 24px 0;
  }
  .article pre .c { color: var(--tx-muted); }
  .article pre .k { color: var(--ac-primary); }
  .article pre .n { color: var(--ac-secondary); }
  .article pre .w { color: var(--ac-warning); }

  .article table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
  .article th, .article td { padding: 12px 14px; border-bottom: 1px solid var(--bd-subtle); text-align: left; }
  .article th { font-family: var(--f-mono); font-size: 11px; color: var(--tx-muted); letter-spacing: 0.08em; text-transform: uppercase; }
  .article td { color: var(--tx-secondary); }
  .article td.num { font-family: var(--f-mono); color: var(--tx-primary); }
  .article td.pos { color: var(--ac-secondary); font-family: var(--f-mono); }

  .callout {
    background: var(--bg-elev);
    border: 1px solid var(--bd-subtle);
    border-left: 2px solid var(--ac-primary);
    border-radius: 12px;
    padding: 22px 26px;
    margin: 28px 0;
  }
  .callout .label { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.12em; color: var(--ac-primary); margin-bottom: 8px; }
  .callout p:last-child { margin-bottom: 0; }

  /* Related + author footer */
  .post-foot { border-top: 1px solid var(--bd-subtle); padding: 80px 0; }
  .author-card {
    border: 1px solid var(--bd-subtle); border-radius: 16px; background: var(--bg-elev);
    padding: 32px; display: grid; grid-template-columns: 80px 1fr; gap: 24px; align-items: start;
  }
  .author-card .av-big { width: 80px; height: 80px; border-radius: 50%; background: linear-gradient(135deg, rgba(63,224,197,0.4), rgba(91,255,168,0.2)); display: grid; place-items: center; font-family: var(--f-mono); font-weight: 600; font-size: 22px; color: #001a17; }
  .author-card h4 { font-family: var(--f-display); font-weight: 600; font-size: 20px; }
  .author-card .role { font-family: var(--f-mono); font-size: 11px; color: var(--ac-primary); letter-spacing: 0.08em; margin-top: 4px; }
  .author-card p { color: var(--tx-secondary); margin-top: 12px; font-size: 14px; line-height: 1.6; }

  .related { margin-top: 64px; }
  .related h6 { font-family: var(--f-mono); font-size: 11px; color: var(--tx-muted); letter-spacing: 0.12em; margin-bottom: 18px; }
  .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
  @media (max-width: 900px) { .related-grid { grid-template-columns: 1fr; } }
  .rel-card { border: 1px solid var(--bd-subtle); border-radius: 12px; padding: 22px; background: var(--bg-elev); transition: all 250ms; }
  .rel-card:hover { border-color: var(--bd-accent); transform: translateY(-2px); }
  .rel-card .rcat { font-family: var(--f-mono); font-size: 10px; color: var(--ac-primary); letter-spacing: 0.12em; }
  .rel-card h5 { font-family: var(--f-display); font-weight: 600; font-size: 16px; line-height: 1.3; margin: 8px 0; }
  .rel-card .rmeta { font-family: var(--f-mono); font-size: 11px; color: var(--tx-muted); margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--bd-subtle); }

  .news-cta { margin-top: 64px; padding: 40px; border: 1px solid var(--bd-subtle); border-radius: 16px; background: linear-gradient(135deg, rgba(63,224,197,0.04), transparent); display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; }
  @media (max-width: 800px) { .news-cta { grid-template-columns: 1fr; } }
  .news-cta h4 { font-family: var(--f-display); font-weight: 700; font-size: 24px; line-height: 1.2; }
  .news-cta p { color: var(--tx-secondary); margin-top: 8px; font-size: 14px; }
  .news-cta form { display: flex; gap: 8px; }
  .news-cta input { flex: 1; padding: 14px 16px; background: var(--bg-elev); border: 1px solid var(--bd-subtle); border-radius: 10px; color: var(--tx-primary); font: inherit; font-size: 14px; outline: none; }
  .news-cta input:focus { border-color: var(--ac-primary); }