:root{
      --bg: #f9f7f3;
      --fg: #141414;
      --muted: #5f5f5f;
      --maxw: 68ch;
      --lh: 1.6;
    }

    html { box-sizing: border-box; }
    *, *::before, *::after { box-sizing: inherit; }

    body{
      margin: 0;
      background: var(--bg);
      color: var(--fg);
      font-family: "Crimson Pro", ui-serif, Georgia, Cambria, "Times New Roman", serif;
      font-size: 18px;
      line-height: var(--lh);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      text-rendering: optimizeLegibility;
    }

    /* Top nav */
    .topbar{
      position: sticky;
      top: 0;
      backdrop-filter: saturate(120%) blur(2px);
      background: color-mix(in oklab, var(--bg) 92%, white);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      z-index: 5;
    }
    .nav{
      max-width: var(--maxw);
      margin: 0 auto;
      padding: .85rem 1.25rem;
      display: flex;
      gap: 1.25rem;
    }
    .nav a{
      font-size: 0.98rem;
      color: var(--fg);
      text-decoration: none;
      position: relative;
      opacity: 0.9;
    }
    .nav a::after{
      content: "";
      position: absolute;
      left: 0; right: 0; bottom: -2px;
      height: 1px;
      background: currentColor;
      transform: scaleX(0);
      transform-origin: left;
      transition: transform .18s ease-out;
      opacity: 0.5;
    }
    .nav a:hover::after,
    .nav a:focus-visible::after{ transform: scaleX(1); }

    /* Frame */
    .frame{
      max-width: var(--maxw);
      margin: 0 auto;
      padding: 2.25rem 1.25rem 4rem;
    }

    /* Top meta / back link */
    .meta{
      display: flex;
      align-items: baseline;
      gap: .75rem;
      color: var(--muted);
      font-size: .98rem;
      margin-bottom: .5rem;
    }
    .back{
      text-decoration: none;
      color: var(--fg);
      opacity: .85;
      position: relative;
      padding-right: .25rem;
    }
    .back::before{
      content: "←";
      margin-right: .4rem;
    }
    .back:hover{ text-decoration: underline; text-underline-offset: 3px; }

    h1{
      font-size: clamp(2rem, 4.2vw, 3rem);
      line-height: 1.15;
      margin: .2rem 0 1rem 0;
      font-weight: 600;
      letter-spacing: .2px;
    }

    .subtle{
      color: var(--muted);
      margin-top: -0.4rem;
      margin-bottom: 1.4rem;
      font-style: italic;
    }

    /* Hero image */
    figure.hero{
      margin: 1.2rem 0 1.6rem 0;
      border-radius: 14px;
      overflow: hidden;
      background: rgba(0,0,0,0.06);
    }
    .hero img{
      width: 100%;
      height: auto;
      display: block;
    }
    .hero figcaption{
      color: var(--muted);
      font-size: .95rem;
      padding: .6rem .2rem 0 .2rem;
    }

    h2{
      font-size: clamp(1.25rem, 2.2vw, 1.5rem);
      line-height: 1.25;
      margin: 1.8rem 0 .6rem 0;
      font-weight: 600;
    }

    p{ margin: 0 0 1.1rem 0; }
    ul{ margin: .2rem 0 1.2rem 1.1rem; }

    /* Right-side GitHub CTA */
    .cta-bar{
      display: flex;
      justify-content: flex-end;
      margin: .5rem 0 1.2rem 0;
    }
    .cta{
      display: inline-flex;
      align-items: center;
      gap: .45rem;
      color: var(--fg);
      opacity: .9;
      text-decoration: none;
      font-style: italic;
      padding: .2rem .1rem;
      transition: transform .18s ease-out, opacity .18s ease-out;
    }
    .cta .arrow{ transform: translateX(-6px); transition: transform .18s ease-out; }
    .cta:hover{ opacity: 1; }
    .cta:hover .arrow{ transform: translateX(0); }

    footer.site{
      margin-top: 3rem;
      padding-top: 1.2rem;
      border-top: 1px solid rgba(0,0,0,0.06);
      color: var(--muted);
      font-size: .95rem;
      text-align: center;
    }

    @media (prefers-reduced-motion: reduce){
      .nav a::after, .cta, .cta .arrow{ transition: none; }
    }