:root {
  --bg: #fffef8;
  --text: #111;
  --muted: #555;
  --line: #111;
  --soft: #f3f0e8;
  --yellow: #fff2a8;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 18px;
  line-height: 1.55;
}
a { color: inherit; text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { background: var(--yellow); }
.skip { position: absolute; left: -999px; top: 10px; }
.skip:focus { left: 10px; background: white; padding: 8px; border: 2px solid var(--line); }
.top {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 3px solid var(--line);
  background: var(--bg);
}
.site-name { font-weight: 800; letter-spacing: -0.03em; }
nav { display: flex; flex-wrap: wrap; gap: 14px; font-size: 15px; }
main, footer { width: min(920px, calc(100% - 32px)); margin: 0 auto; }
.hero { padding: 72px 0 32px; }
.eyebrow { display: inline-block; margin: 0 0 18px; padding: 5px 8px; border: 2px solid var(--line); background: var(--yellow); font-size: 15px; font-weight: 700; }
h1 { font-size: clamp(44px, 9vw, 92px); line-height: .9; letter-spacing: -0.07em; margin: 0 0 24px; max-width: 850px; }
h2 { font-size: clamp(30px, 5vw, 48px); line-height: 1; letter-spacing: -0.05em; margin: 0 0 20px; }
h3 { margin: 0 0 8px; font-size: 22px; letter-spacing: -0.03em; }
p { margin: 0 0 16px; }
.lede { font-size: clamp(22px, 3vw, 31px); line-height: 1.25; letter-spacing: -0.03em; max-width: 820px; }
.hero-box, .notice, .callout {
  border: 3px solid var(--line);
  box-shadow: 8px 8px 0 var(--line);
  background: white;
}
.hero-box { margin-top: 32px; padding: 22px; font-size: 20px; }
.notice { margin: 28px 0 56px; padding: 18px 20px; background: var(--soft); }
.section { padding: 46px 0; border-top: 3px solid var(--line); }
.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; }
.steps li { position: relative; margin: 0 0 14px; padding: 16px 16px 16px 64px; border: 2px solid var(--line); background: white; }
.steps li::before { counter-increment: step; content: counter(step); position: absolute; left: 14px; top: 15px; width: 34px; height: 34px; display: grid; place-items: center; border: 2px solid var(--line); border-radius: 50%; font-weight: 800; background: var(--yellow); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 24px 0; }
.card { padding: 18px; border: 3px solid var(--line); background: white; }
.big { font-size: 72px; line-height: .85; font-weight: 900; letter-spacing: -0.08em; }
ul { padding-left: 24px; }
li { margin-bottom: 9px; }
.checklist { list-style: none; padding: 0; columns: 2; column-gap: 28px; }
.checklist li { break-inside: avoid; padding-left: 26px; position: relative; }
.checklist li::before { content: "✓"; position: absolute; left: 0; font-weight: 900; }
.callout { padding: 28px; margin: 38px 0; background: var(--yellow); }
.button { display: inline-block; padding: 12px 16px; border: 3px solid var(--line); box-shadow: 5px 5px 0 var(--line); background: white; font-weight: 800; text-decoration: none; }
.button:hover { transform: translate(2px, 2px); box-shadow: 3px 3px 0 var(--line); }
.small { font-size: 15px; color: var(--muted); }
details { border: 2px solid var(--line); background: white; padding: 16px 18px; margin-bottom: 12px; }
summary { cursor: pointer; font-weight: 800; }
details p { margin: 12px 0 0; }
.sources { font-size: 16px; }
footer { border-top: 3px solid var(--line); padding: 24px 0 42px; color: var(--muted); font-size: 15px; }
@media (max-width: 760px) {
  body { font-size: 16px; }
  .top { align-items: flex-start; flex-direction: column; }
  .hero { padding-top: 48px; }
  .grid { grid-template-columns: 1fr; }
  .checklist { columns: 1; }
}