:root{ --ink:#111; --muted:#555; --faint:#aaa; --line:#ebebeb; --bg:#fff; }
      *{ box-sizing:border-box; }
      body{ margin:0; background:var(--bg); color:var(--ink); font-family:'Instrument Sans', system-ui, sans-serif; -webkit-font-smoothing:antialiased; }
      a{ color:var(--ink); }
      header{ display:flex; align-items:center; justify-content:space-between; padding:20px clamp(20px,5vw,80px); border-bottom:1px solid var(--line); }
      .logo{ display:flex; align-items:center; gap:10px; text-decoration:none; font-size:18px; font-weight:500; color:var(--ink); }
      .logo svg{ width:28px; height:28px; }
      main{ max-width:760px; margin:0 auto; padding:clamp(32px,6vw,64px) 20px clamp(64px,8vw,96px); }
      h1{ font-size:clamp(32px,5vw,44px); font-weight:400; letter-spacing:-0.02em; margin:0 0 8px; }
      .updated{ color:var(--faint); font-size:13px; margin:0 0 40px; }
      h2{ font-size:20px; font-weight:600; margin:40px 0 12px; }
      h3{ font-size:16px; font-weight:600; margin:24px 0 8px; }
      p, li{ font-size:15px; line-height:1.7; color:var(--muted); margin:0 0 10px; }
      ul{ padding-left:20px; }
      .todo{ background:#fff7e6; border:1px solid #f0d9a0; color:#8a6300; padding:12px 16px; border-radius:10px; font-size:13px; margin:16px 0; }
      .card{ border:1px solid var(--line); border-radius:16px; padding:20px 24px; margin:16px 0; }
      footer{ text-align:center; padding:24px; border-top:1px solid var(--line); }
      footer a{ color:var(--muted); font-size:13px; text-decoration:none; }
      .back{ display:inline-flex; align-items:center; gap:6px; font-size:14px; color:var(--muted); text-decoration:none; margin-bottom:24px; }
    
      /* same frame as the rest of the site: logo and content on the --pad line
         (60px desktop, 20px tablet, 16px phone); header like the homepage/subpage nav */
      :root{ --pad:60px; --hpad:60px; }
      header{ padding:51px var(--hpad) 0; border-bottom:none; }
      .logo svg{ height:clamp(28px,2.25vw,38px)!important; width:auto!important; }
      main{ max-width:none; margin:0; padding:clamp(40px,6vh,64px) var(--pad) clamp(64px,8vw,96px); }
      footer{ margin:0 var(--pad); padding:24px 0 32px; text-align:left; }
      @media(max-width:900px){ :root{ --hpad:20px; } }
      @media(max-width:768px){ :root{ --pad:20px; --hpad:34px; } header{ padding-top:36px; } }
      @media(max-width:480px){ :root{ --pad:16px; --hpad:30px; } }
      @media(max-width:374px){ .logo svg{ height:24px!important; } }

/* ===== Accessibility: minimum text contrast 4.5:1 (WCAG AA) ===== */
:root{ --faint:#767676; }
footer p, footer p a{ color:#767676!important; }
footer p a{ text-decoration:underline; text-underline-offset:2px; }