:root {
    /* tweakable */
    --bg: #F7F5F0;
    --ink: #1E1E1E;
    --accent: #54624C;
    --font-display: "Newsreader", Georgia, serif;
    --font-ui: "Hanken Grotesk", system-ui, sans-serif;
    --base: 17px;
    --pad-scale: 1;

    /* derived */
    --ink-soft: color-mix(in oklab, var(--ink) 56%, var(--bg));
    --ink-faint: color-mix(in oklab, var(--ink) 34%, var(--bg));
    --line: color-mix(in oklab, var(--ink) 13%, var(--bg));
    --line-strong: color-mix(in oklab, var(--ink) 22%, var(--bg));
    --card: color-mix(in oklab, #ffffff 42%, var(--bg));
    --accent-soft: color-mix(in oklab, var(--accent) 13%, var(--bg));
    --accent-ink: color-mix(in oklab, var(--accent) 78%, var(--ink));

    --maxw: 1240px;
    --pad-y: calc(120px * var(--pad-scale));
    --radius: 3px;
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-ui);
    font-size: var(--base);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }
  ::selection { background: var(--accent); color: var(--bg); }
  a { color: inherit; text-decoration: none; }
  img { display: block; max-width: 100%; }
  /* iOS/WKWebView default <button> text to system blue — keep our ink color */
  button { color: inherit; font: inherit; -webkit-appearance: none; appearance: none; -webkit-tap-highlight-color: transparent; }

  .wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 40px; }
  @media (max-width: 720px) { .wrap { padding: 0 22px; } }

  h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 500; margin: 0; line-height: 1.08; letter-spacing: -0.01em; }
  p { margin: 0; }
  .serif { font-family: var(--font-display); }

  /* labels / kickers */
  .kicker {
    font-family: var(--font-ui);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent-ink);
    display: inline-flex;
    align-items: center;
    gap: 10px;
  }
  .kicker::before {
    content: "";
    width: 26px; height: 1px;
    background: var(--accent-ink);
    display: inline-block;
  }
  .kicker.nolead::before { display: none; }

  .eyebrow {
    font-size: 11.5px; font-weight: 600; letter-spacing: 0.2em;
    text-transform: uppercase; color: var(--ink-faint);
  }

  /* nav */
  header.nav {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in oklab, var(--bg) 86%, transparent);
    backdrop-filter: blur(14px) saturate(1.2);
    border-bottom: 1px solid var(--line);
  }
  .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
  .brand { font-family: var(--font-display); font-weight: 500; letter-spacing: -0.015em; font-size: 25px; line-height: 1; display: inline-flex; align-items: baseline; gap: 0; background: none; border: 0; padding: 0; cursor: pointer; color: var(--ink); transition: color .2s; }
  .brand:hover { color: var(--accent-ink); }
  .brand .dot { color: var(--accent-ink); }
  nav.links { display: flex; gap: 4px; }
  nav.links button {
    font-family: var(--font-ui); font-size: 14px; font-weight: 500;
    color: var(--ink-soft); background: none; border: 0; cursor: pointer;
    padding: 8px 13px; border-radius: 100px; transition: color .2s, background .2s;
    letter-spacing: 0.01em;
  }
  nav.links button:hover { color: var(--ink); }
  nav.links button.active { color: var(--accent-ink); background: var(--accent-soft); }
  .nav-cta {
    font-family: var(--font-ui); font-size: 13.5px; font-weight: 600;
    border: 1px solid var(--line-strong); padding: 9px 16px; border-radius: 100px;
    cursor: pointer; background: none; color: var(--ink); transition: all .2s;
  }
  .nav-cta:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }
  .burger { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
  .burger span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 4px 0; transition: .25s; }
  @media (max-width: 940px) {
    nav.links, .nav-cta { display: none; }
    .burger { display: block; }
    nav.links.open {
      display: flex; flex-direction: column; gap: 0;
      position: absolute; top: 68px; left: 0; right: 0;
      background: var(--bg); border-bottom: 1px solid var(--line); padding: 12px 22px 20px;
    }
    nav.links.open button { text-align: left; padding: 13px 8px; font-size: 17px; border-bottom: 1px solid var(--line); border-radius: 0; }
  }

  /* buttons */
  .btn {
    display: inline-flex; align-items: center; gap: 10px;
    font-family: var(--font-ui); font-size: 15px; font-weight: 600;
    padding: 13px 24px; border-radius: 100px; cursor: pointer;
    border: 1px solid transparent; transition: all .2s; background: none; color: inherit;
  }
  .btn .arr { transition: transform .25s; }
  .btn:hover .arr { transform: translateX(4px); }
  .btn-solid { background: var(--ink); color: var(--bg); border-color: var(--ink); }
  .btn-solid:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
  .btn-ghost { border-color: var(--line-strong); color: var(--ink); }
  .btn-ghost:hover { border-color: var(--ink); background: color-mix(in oklab, var(--ink) 5%, var(--bg)); }

  /* sections */
  section.block { padding: var(--pad-y) 0; }
  .section-head { display: flex; flex-direction: column; gap: 18px; max-width: 720px; margin-bottom: 56px; }
  .section-head h2 { font-size: clamp(30px, 4vw, 46px); }
  .lede { font-size: clamp(18px, 2vw, 21px); color: var(--ink-soft); line-height: 1.5; }

  /* hairline divider */
  .rule { height: 1px; background: var(--line); border: 0; margin: 0; }

  /* reveal — above-the-fold content reveals instantly (always visible on load);
     below-the-fold fades + slides in on scroll. */
  .reveal { opacity: 1; transform: none; transition: transform .7s cubic-bezier(.2,.7,.2,1), opacity .7s cubic-bezier(.2,.7,.2,1); }
  html.anim-ready .reveal:not(.in) { opacity: 0; transform: translateY(18px); }
  html.anim-ready .reveal.in { opacity: 1; transform: none; }
  .reveal.reveal--instant { transition: none; }
  @media (prefers-reduced-motion: reduce) { html.anim-ready .reveal { opacity: 1; transform: none; transition: none; } }

  /* footer */
  footer.foot { background: var(--ink); color: color-mix(in oklab, var(--bg) 86%, var(--ink)); padding: 84px 0 40px; }
  footer.foot a:hover { color: var(--bg); }

  /* cards generic */
  .card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); transition: border-color .25s, transform .25s; }

  #root { min-height: 100vh; display: flex; flex-direction: column; }
  .page { flex: 1 0 auto; }

  .hide-on-tweaks-off { }