:root {
  --blue: #1e4b8c;
  --blue-2: #2b63b5;
  --yellow: #f4d35e;
  --wall: #e8edf2;
  --ink: #1a2433;
  --mute: #5c6b7a;
  --display: "Rubik", "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: 68px; }
body {
  margin: 0;
  background: var(--wall);
  color: var(--ink);
  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(--blue); text-decoration: underline; text-underline-offset: 3px; }
button { font-family: inherit; cursor: pointer; }
label { display: block; font-size: 13px; color: var(--mute); margin: 8px 0; }
input[type="range"] { width: min(280px, 100%); accent-color: var(--blue); }
.chalk-grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 6;
  opacity: 0.16;
  background-image: url("images/texture.webp");
  background-size: 320px auto;
  mix-blend-mode: multiply;
}
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 80; background: var(--yellow); padding: 8px; }
.board-mast {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 20px;
  background: var(--blue);
  color: #fff;
  border-bottom: 6px solid var(--yellow);
}
.brand { font-family: var(--display); font-weight: 800; font-size: 22px; }
.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: #c9d8ef;
  font-weight: 400;
}
.nav-toggle { display: none; background: var(--yellow); color: var(--ink); border: 0; padding: 6px 12px; font-weight: 700; }
.mag-links { display: flex; gap: 12px; font-size: 14px; flex-wrap: wrap; align-items: center; }
.mag-links a { color: #d5e2f5; }
.mag-links a.is-active, .mag-links a:hover { color: var(--yellow); }
.mag-links .live { background: var(--yellow); color: var(--ink); padding: 6px 12px; font-weight: 700; }
.board-hero {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  min-height: calc(100vh - 62px);
  background: #dfe6ee;
}
.board-hero .copy { padding: 7vh 36px; }
.board-hero img { width: 100%; height: 100%; object-fit: cover; min-height: 100%; }
.kicker { font-family: var(--mono); letter-spacing: 0.12em; font-size: 11px; color: var(--blue); margin: 0 0 10px; }
h1, h2, h3 { font-family: var(--display); margin: 0 0 12px; line-height: 1.12; }
h1 { font-size: clamp(30px, 4.4vw, 48px); }
h2 { font-size: clamp(22px, 3vw, 34px); }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.btn { display: inline-flex; align-items: center; padding: 10px 16px; font-size: 14px; font-weight: 700; }
.btn.blue { background: var(--blue); color: #fff; }
.btn.yellow { background: var(--yellow); color: var(--ink); }
.grid-wrap { width: min(1040px, calc(100% - 36px)); margin: 0 auto; padding: 64px 0; }
.mag-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; margin-top: 18px; }
.mag { padding: 16px; box-shadow: 3px 4px 0 rgba(30, 75, 140, 0.18); transform: rotate(-0.6deg); }
.mag.blue { background: var(--blue); color: #fff; }
.mag.yellow { background: var(--yellow); }
.mag.white { background: #fff; }
.mag ul { margin: 0; padding-left: 1.1em; }
.shot { margin: 22px 0 0; }
.shot img { width: 100%; height: 280px; object-fit: cover; }
.shot figcaption { font-size: 13px; color: var(--mute); margin-top: 8px; }
.slot-box { background: #fff; border: 4px dashed var(--blue); padding: 18px; max-width: 30em; margin: 16px 0; }
.slot-box.is-full { border-style: solid; border-color: #9b1c1c; }
.n { font-family: var(--display); font-size: 48px; margin: 0; color: var(--blue); line-height: 1; }
.n span { font-size: 16px; color: var(--mute); }
.chk { display: flex; align-items: center; gap: 8px; color: var(--ink); }
#rules ol { background: #fff; padding: 16px 16px 16px 36px; border-left: 8px solid var(--yellow); max-width: 46em; }
.io { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.io > div { background: #fff; padding: 16px; border-top: 6px solid var(--blue); }
.url { margin-top: 18px; font-family: var(--mono); font-size: 13px; }
footer { padding: 16px 20px 40px; color: var(--mute); font-size: 13px; }
@media (max-width: 900px) {
  .board-hero, .mag-row, .io { grid-template-columns: 1fr; }
  .board-hero img { min-height: 42vh; height: 42vh; }
  .nav-toggle { display: inline-block; }
  .board-mast { flex-wrap: wrap; }
  .mag-links { display: none; width: 100%; flex-direction: column; padding: 8px 0; }
  .mag-links.open { display: flex; }
}