:root {
  --day: #f4e6b0;
  --day-2: #fff6d4;
  --board: #2a3228;
  --board-2: #1e241c;
  --chalk: #e8e4d0;
  --safe: #c43a2a;
  --ink: #1e241c;
  --mute: #6a6450;
  --display: "Zilla Slab", "Noto Serif SC", 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: 68px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--day);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.app-link { color: var(--safe); text-decoration: underline; text-underline-offset: 3px; }
button { font-family: inherit; cursor: pointer; }
label { display: block; font-size: 13px; color: var(--mute); }
input[type="range"] { width: min(280px, 100%); accent-color: var(--board); }
.dust {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 6;
  opacity: 0.12;
  background-image: url("images/texture.webp");
  background-size: 340px auto;
  mix-blend-mode: multiply;
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 80; background: var(--day); color: var(--board); padding: 8px; }
.boardbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 22px;
  background: var(--board);
  color: var(--chalk);
}
.brand { font-family: var(--display); font-weight: 700; }
.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: #a8b09c;
  font-weight: 400;
}
.nav-toggle {
  display: none;
  background: var(--day);
  color: var(--board);
  border: 0;
  padding: 6px 12px;
}
.seat-links { display: flex; gap: 14px; font-size: 14px; flex-wrap: wrap; }
.seat-links a { color: #a8b09c; }
.seat-links a.is-active, .seat-links a:hover { color: var(--chalk); }
.seat-links .live { background: var(--day); color: var(--board); padding: 6px 12px; }
.yard {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  min-height: calc(100vh - 56px);
}
.yard figure { margin: 0; }
.yard img { width: 100%; height: 100%; object-fit: cover; min-height: 100%; }
.day { padding: 7vh 32px; background: var(--day-2); }
.kicker {
  font-family: var(--mono);
  letter-spacing: 0.16em;
  font-size: 11px;
  color: #5a6a40;
  margin: 0 0 12px;
}
h1, h2, h3 { font-family: var(--display); margin: 0 0 12px; line-height: 1.15; }
h1 { font-size: clamp(30px, 4.4vw, 48px); }
h2 { font-size: clamp(22px, 2.8vw, 34px); }
.lead { max-width: 40em; color: #4a4638; }
.cell {
  margin: 20px 0;
  padding: 14px 16px;
  background: #fffdf4;
  border: 3px solid var(--board);
  max-width: 30em;
}
.cell.is-ok { border-color: #3a6a40; }
.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-bottom: 10px;
}
.grid b {
  display: block;
  height: 22px;
  background: var(--day);
  border: 2px solid var(--board);
}
.grid b.off {
  background: transparent;
  border-style: dashed;
  border-color: var(--safe);
}
.n { font-family: var(--display); font-size: 44px; margin: 0 0 6px; }
.n span { font-size: 18px; color: var(--mute); }
.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn { display: inline-flex; align-items: center; padding: 10px 16px; border: 1px solid currentColor; font-size: 14px; }
.btn.chalk { background: var(--board); color: var(--chalk); border-color: var(--board); }
.btn.line { color: var(--board); }
.w { width: min(1040px, calc(100% - 40px)); margin: 0 auto; padding: 72px 0; }
.alt { background: var(--board); color: var(--chalk); }
.alt .kicker { color: var(--day); }
.tri { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin-top: 20px; }
.tri article { background: #fffdf4; color: var(--ink); padding: 16px; }
.alt .tri article { background: var(--board-2); color: var(--chalk); }
.tri ul, .io ul, #rules ol { margin: 0; padding-left: 1.1em; }
.steps { padding-left: 1.2em; max-width: 48em; }
.steps li { margin-bottom: 10px; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.pair img { width: 100%; height: 240px; object-fit: cover; }
.pair figcaption { font-size: 13px; color: #c8c4b0; margin-top: 8px; }
#need, #cert, #rules { background: var(--day); }
#rules ol {
  background: #fffdf4;
  padding: 16px 16px 16px 36px;
  border-left: 8px solid var(--board);
  max-width: 46em;
}
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.io > div { background: var(--board-2); padding: 16px; }
.url { margin-top: 18px; font-family: var(--mono); font-size: 13px; }
footer { padding: 20px 24px 40px; color: var(--mute); font-size: 13px; }
@media (max-width: 900px) {
  .yard, .tri, .pair, .io { grid-template-columns: 1fr; }
  .yard img { min-height: 42vh; height: 42vh; }
  .nav-toggle { display: inline-block; }
  .boardbar { flex-wrap: wrap; }
  .seat-links {
    display: none;
    width: 100%;
    flex-direction: column;
    background: var(--board-2);
    padding: 12px;
  }
  .seat-links.open { display: flex; }
  .day { padding: 28px 18px 36px; }
}