:root{
    --paper: #f4f1ea; --paper-raised: #fffdf9; --paper-soft: #f0ece3;
    --ink: #141c1a; --ink-soft: #52605b; --ink-faint: #7a847f;
    --amber: #ffb25b; --amber-deep: #dd7d2f; --teal: #2d6c66;
    --line: rgba(20, 28, 26, 0.09); --line-strong: rgba(20, 28, 26, 0.14);
    --shadow: 0 20px 60px rgba(17, 24, 23, 0.12);
    --font-display: 'Fraunces', Georgia, serif;
    --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'IBM Plex Mono', 'SF Mono', monospace;
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --paper: #121814; --paper-raised: #1a211d; --paper-soft: #1e2925;
      --ink: #edf2ee; --ink-soft: #b8c1be; --ink-faint: #8a9692;
      --amber: #ffc77a; --amber-deep: #ffb15f; --teal: #7fd1c7;
      --line: rgba(255,255,255,0.08); --line-strong: rgba(255,255,255,0.12);
      --shadow: 0 24px 80px rgba(0,0,0,0.34);
    }
  }
  :root[data-theme="dark"]{
    --paper: #121814; --paper-raised: #1a211d; --paper-soft: #1e2925;
    --ink: #edf2ee; --ink-soft: #b8c1be; --ink-faint: #8a9692;
    --amber: #ffc77a; --amber-deep: #ffb15f; --teal: #7fd1c7;
    --line: rgba(255,255,255,0.08); --line-strong: rgba(255,255,255,0.12);
    --shadow: 0 24px 80px rgba(0,0,0,0.34);
  }
  *{ box-sizing: border-box; }
  html{ background: radial-gradient(circle at top, rgba(255,178,91,0.12), transparent 35%), var(--paper); }
  body{ margin:0; background: transparent; color: var(--ink); font-family: var(--font-body); line-height: 1.6; -webkit-font-smoothing: antialiased; }
  a{ color: var(--amber-deep); }
  ::selection{ background: var(--amber); color: var(--paper-raised); }
  :focus-visible{ outline: 2px solid var(--amber); outline-offset: 3px; }

  .shell{ max-width: 760px; margin: 0 auto; padding: 0 24px; }

  .masthead{ position: sticky; top:0; z-index:10; backdrop-filter: blur(18px); background: rgba(244, 241, 234, 0.75); border-bottom: 1px solid var(--line); padding: 18px 0; }
  :root[data-theme="dark"] .masthead{ background: rgba(18, 24, 20, 0.7); }
  .masthead .shell{ display:flex; align-items: center; justify-content: space-between; gap: 16px; }
  .wordmark{ font-family: var(--font-display); font-size: 21px; font-weight: 600; letter-spacing: -0.01em; text-decoration: none; }
  .wordmark .dot{ color: var(--amber); }
  .masthead nav{ display:flex; align-items:center; gap:18px; font-size: 13.5px; color: var(--ink-soft); }
  .masthead nav a{ text-decoration: none; border-bottom: 1px solid transparent; }
  .masthead nav a:hover{ border-bottom-color: var(--ink-soft); }

  .page-head{ padding: 52px 0 12px; }
  .page-head .kicker{ font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); margin-bottom: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
  .page-head h1{ font-family: var(--font-display); font-weight: 500; font-size: clamp(30px, 4vw, 42px); margin: 0 0 10px; letter-spacing: -0.02em; }
  .page-head .updated{ font-size: 13px; color: var(--ink-faint); }

  article{ padding: 18px 0 70px; }
  article section{ padding: 24px 0; border-bottom: 1px solid var(--line); }
  article section:last-child{ border-bottom: none; }
  article h2{ font-size: 17px; font-weight: 600; margin: 0 0 12px; }
  article p{ font-size: 15px; color: var(--ink-soft); margin: 0 0 12px; max-width: 62ch; }
  article p:last-child{ margin-bottom: 0; }
  article ul{ margin: 10px 0; padding-left: 20px; font-size: 15px; color: var(--ink-soft); max-width: 60ch; }
  article li{ margin-bottom: 8px; }
  article code{ font-family: var(--font-mono); font-size: 12.5px; background: var(--paper-raised); padding: 2px 6px; border-radius: 6px; border: 1px solid var(--line); }

  footer{ border-top: 1px solid var(--line); padding: 26px 0 60px; }
  footer .shell{ display:flex; justify-content: space-between; align-items:center; gap:16px; flex-wrap: wrap; font-size: 12.5px; color: var(--ink-faint); }
  footer nav{ display:flex; gap:16px; align-items:center; }
  footer a{ text-decoration: underline; text-underline-offset: 2px; }