:root {
  --milk: #f7f4ec;
  --block: #ece7da;
  --ink: #2a2a28;
  --mold: #4a6b48;
  --mute: #8a8478;
  --display: "Figtree", "Noto Sans SC", sans-serif;
  --sans: "Noto Sans SC", "PingFang SC", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 56px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--milk);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
}
.whey {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 4;
  opacity: 0.16;
  background-image: url("images/texture.webp");
  background-size: 420px auto;
  mix-blend-mode: multiply;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.app-link { color: var(--mold); text-decoration: underline; text-underline-offset: 3px; }
button { font-family: inherit; cursor: pointer; }
code { font-family: var(--mono); background: #e7e1d2; padding: 0.05em 0.35em; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 10px; top: 10px; z-index: 80; background: #fff; padding: 8px; }
.vat-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 18px;
  min-height: 54px;
  background: rgba(247, 244, 236, 0.92);
  border-bottom: 1px solid #ddd6c6;
}
.mark { font-family: var(--display); font-weight: 700; }
.mark small { display: block; font-family: var(--mono); font-size: 10px; color: var(--mold); letter-spacing: 0.16em; font-weight: 500; }
.vat-links { display: flex; flex-wrap: wrap; gap: 8px 14px; font-size: 14px; }
.vat-links a.is-active { color: var(--mold); }
.vat-links .live { background: var(--ink); color: var(--milk); padding: 6px 12px; font-weight: 700; }
.nav-toggle { display: none; background: transparent; border: 1px solid var(--ink); padding: 6px 12px; }
.milk { position: relative; }
.milk > img { width: 100%; height: 82vh; object-fit: cover; }
.slab {
  position: absolute;
  right: 5vw;
  top: 10vh;
  width: min(480px, 90vw);
  background: rgba(247, 244, 236, 0.95);
  padding: 28px 24px;
  box-shadow: 0 24px 40px rgba(42, 42, 40, 0.08);
}
.kicker { font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em; color: var(--mold); margin: 0 0 8px; }
h1, h2, h3 { font-family: var(--display); margin: 0 0 12px; line-height: 1.15; }
h1 { font-size: clamp(28px, 4.4vw, 42px); }
h2 { font-size: clamp(22px, 3vw, 32px); }
.quiet { color: var(--mute); }
.path {
  list-style: none;
  display: flex;
  gap: 0;
  padding: 0;
  margin: 16px 0;
  font-family: var(--mono);
  font-size: 13px;
}
.path li {
  flex: 1;
  text-align: center;
  padding: 8px 0;
  background: #fff;
  border: 1px solid #ddd6c6;
  position: relative;
}
.path li + li { border-left: 0; }
.curd { margin: 0 0 10px; padding: 12px 14px; background: #fff; border-left: 6px solid var(--ink); }
.curd span { font-family: var(--mono); font-size: 12px; color: var(--mute); }
.curd strong { display: block; margin: 6px 0 4px; font-size: 20px; }
.curd p { margin: 0; color: var(--mute); font-size: 14px; }
.curd-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.curd-btns button { background: #fff; border: 1px solid #d4cdb8; padding: 7px 12px; }
.curd-btns button.on { background: var(--ink); color: var(--milk); border-color: var(--ink); }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.btn { display: inline-block; padding: 10px 16px; border: 1px solid var(--ink); font-weight: 700; }
.btn.fill { background: var(--ink); color: var(--milk); }
.btn.ghost { background: transparent; }
.wrap { width: min(1000px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0; }
.wet { background: var(--block); }
.tri, .io, .pair { display: grid; gap: 16px; }
.tri { grid-template-columns: repeat(3, 1fr); }
.io, .pair { grid-template-columns: 1fr 1fr; }
.tri article, .io article { background: #fff; padding: 16px; border: 1px solid #e2dccc; }
.tri .warn { border-color: var(--mold); background: #eef3ea; }
.seq { list-style: none; margin: 0 0 28px; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.seq li { background: #fff; padding: 14px; }
ul { margin: 0; padding-left: 1.1em; }
li + li { margin-top: 6px; }
figure { margin: 0; }
figcaption { color: var(--mute); font-size: 13px; margin-top: 8px; }
.bound { max-width: 720px; }
footer {
  padding: 24px 20px 48px;
  border-top: 1px solid #ddd6c6;
  display: flex;
  justify-content: space-between;
  color: var(--mute);
  font-size: 14px;
}
@media (max-width: 900px) {
  .nav-toggle { display: inline-block; }
  .vat-links {
    display: none;
    position: absolute;
    top: 54px;
    left: 0;
    right: 0;
    background: var(--milk);
    padding: 12px 16px;
    flex-direction: column;
    align-items: flex-start;
  }
  .vat-links.open { display: flex; }
  .milk > img { height: 40vh; }
  .slab { position: relative; right: 0; top: 0; width: auto; }
  .tri, .io, .pair, .seq { grid-template-columns: 1fr; }
  footer { flex-direction: column; gap: 8px; }
}