/* Upshot Game Labs: cream paper, ink, one green. Colors from the splash kit. */
@font-face { font-family: "Space Grotesk"; font-weight: 500; font-display: swap; src: url("fonts/space-grotesk-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "Space Grotesk"; font-weight: 700; font-display: swap; src: url("fonts/space-grotesk-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "Silkscreen"; font-weight: 400; font-display: swap; src: url("fonts/silkscreen-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 400; font-display: swap; src: url("fonts/inter-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Inter"; font-weight: 600; font-display: swap; src: url("fonts/inter-latin-600-normal.woff2") format("woff2"); }

:root {
  --paper: #F4F1EA;
  --card: #FBFAF6;
  --ink: #16182E;
  --ink-soft: #4A4D66;
  --rule: #DCD7CB;
  --green: #3DDC97;
  --green-deep: #1F8F60;
  --fizz: #B4F7D6;
  --display: "Space Grotesk", system-ui, sans-serif;
  --pixel: "Silkscreen", ui-monospace, monospace;
  --body: "Inter", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.6 var(--body);
}
/* faint graph paper, like a lab notebook */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(var(--rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--rule) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: .35;
}

a { color: var(--ink); text-decoration-color: var(--green); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { color: var(--green-deep); }
:focus-visible { outline: 3px solid var(--green); outline-offset: 2px; border-radius: 4px; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

/* header */
.top { padding: 22px 0; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { width: 30px; height: auto; }
.brand b { font: 700 19px/1 var(--display); letter-spacing: .04em; }
.brand span { font: 400 11px/1 var(--pixel); letter-spacing: .2em; color: var(--ink-soft); }
.brand .stack { display: flex; flex-direction: column; gap: 3px; }
nav { display: flex; gap: 18px; font: 400 12px/1 var(--pixel); letter-spacing: .12em; }
nav a { text-decoration: none; color: var(--ink-soft); }
nav a:hover, nav a[aria-current] { color: var(--ink); text-decoration: underline; text-decoration-color: var(--green); }

/* type */
h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.15; margin: 0 0 .5em; }
h1 { font-size: clamp(34px, 7vw, 52px); letter-spacing: .01em; }
h2 { font-size: 26px; margin-top: 1.8em; }
h3 { font-size: 19px; margin-top: 1.4em; }
p, ul { margin: 0 0 1em; }
li { margin-bottom: .35em; }
.label { font: 400 12px/1.4 var(--pixel); letter-spacing: .18em; color: var(--green-deep); text-transform: uppercase; }
.lede { font-size: 20px; color: var(--ink-soft); }
.muted { color: var(--ink-soft); }

/* home hero */
.hero { text-align: center; padding: 40px 0 24px; }
.hero img { width: 120px; height: auto; }
.hero h1 { margin: 18px 0 2px; font-size: clamp(44px, 11vw, 72px); letter-spacing: .04em; }
.hero .sub { font: 400 clamp(15px, 3.6vw, 20px)/1 var(--pixel); letter-spacing: .3em; padding-left: .3em; }
.hero .lede { max-width: 30em; margin: 26px auto 0; }

/* cards */
.card {
  background: var(--card);
  border: 2px solid var(--ink);
  border-radius: 14px;
  padding: 22px;
  box-shadow: 4px 4px 0 var(--ink);
}
.experiment { display: grid; grid-template-columns: 96px 1fr; gap: 20px; align-items: start; margin: 18px 0; }
.experiment img { width: 96px; height: 96px; border-radius: 22px; }
.experiment h3 { margin: 4px 0 6px; font-size: 24px; }
.experiment p { margin-bottom: .6em; }
.status { display: inline-flex; align-items: center; gap: 8px; font: 400 11px/1 var(--pixel); letter-spacing: .14em; }
.status::before { content: ""; width: 9px; height: 9px; background: var(--green); box-shadow: 0 0 0 2px var(--fizz); }
.slot { border-style: dashed; box-shadow: none; background: transparent; color: var(--ink-soft); text-align: center; }

.notes { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin: 16px 0; }
.notes .card { box-shadow: none; border-width: 1.5px; padding: 18px; }
.notes h3 { margin-top: 0; font-size: 17px; }
.notes p { margin: 0; font-size: 15px; color: var(--ink-soft); }

/* game page */
.game-head { display: flex; gap: 22px; align-items: center; margin: 28px 0 10px; }
.game-head img { width: 112px; height: 112px; border-radius: 26px; box-shadow: 4px 4px 0 var(--ink); border: 2px solid var(--ink); }
.btn {
  display: inline-block; padding: 12px 20px; border: 2px solid var(--ink); border-radius: 999px;
  background: var(--green); color: var(--ink); font: 700 16px/1 var(--display); text-decoration: none;
  box-shadow: 3px 3px 0 var(--ink);
}
.btn[aria-disabled="true"] { background: var(--card); color: var(--ink-soft); box-shadow: none; cursor: default; }

/* long documents (policy, support) */
.doc { padding: 10px 0 30px; }
.doc h1 { font-size: clamp(30px, 6vw, 42px); }
.doc .meta { font: 400 12px/1.6 var(--pixel); letter-spacing: .12em; color: var(--ink-soft); }
.doc .summary { margin: 22px 0; }
.doc .summary ul { margin: 0; padding-left: 1.1em; }
.doc table { width: 100%; border-collapse: collapse; margin: 0 0 1em; font-size: 15px; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 9px 10px 9px 0; border-bottom: 1px solid var(--rule); }
.doc th { font-family: var(--display); }
.table-scroll { overflow-x: auto; }

/* footer */
footer { margin-top: 56px; padding: 26px 0 40px; border-top: 1.5px solid var(--rule); font-size: 14px; color: var(--ink-soft); }
footer .wrap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
footer a { color: var(--ink-soft); }

@media (max-width: 520px) {
  body { font-size: 16px; }
  .experiment { grid-template-columns: 1fr; }
  .game-head { flex-direction: column; align-items: flex-start; }
  nav { gap: 14px; }
}