:root {
  color-scheme: light;
  --paper: #fbfaf6;
  --card: #ffffff;
  --ink: #25231f;
  --muted: #6f6b61;
  --line: #e7e2d7;
  --coral: #bc3f2e;
  --coral-soft: #fff0eb;
  --sage: #587365;
  --shadow: 0 18px 60px rgba(55, 45, 30, .08);
}

* { box-sizing: border-box; }

html {
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  color: var(--ink);
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 88% 8%, rgba(239, 108, 88, .10), transparent 28rem),
    var(--paper);
}

a { color: var(--sage); text-underline-offset: .18em; }
a:hover { color: var(--coral); }
a:focus-visible, summary:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 4px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--ink);
  color: white;
  font-weight: 700;
  transform: translateY(-160%);
}

.skip-link:focus {
  color: white;
  transform: translateY(0);
}

.shell {
  width: min(960px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 26px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-weight: 760;
  letter-spacing: -.02em;
  text-decoration: none;
}

.mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 13px;
  background: var(--coral);
  color: white;
  box-shadow: 0 8px 24px rgba(239, 108, 88, .28);
}

nav { display: flex; gap: 20px; font-size: 14px; }
nav a { color: var(--muted); text-decoration: none; }

.hero { padding: 86px 0 72px; max-width: 790px; }

.eyebrow {
  margin: 0 0 18px;
  color: var(--coral);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: .11em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(44px, 8vw, 82px);
  line-height: .98;
  letter-spacing: -.055em;
}

.lede {
  margin: 28px 0 0;
  max-width: 680px;
  color: var(--muted);
  font-size: clamp(19px, 2.8vw, 25px);
  line-height: 1.45;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 0 0 78px;
}

.card {
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, .84);
  box-shadow: var(--shadow);
}

.card .icon { font-size: 27px; }
.card h2 { margin: 20px 0 9px; font-size: 19px; letter-spacing: -.025em; }
.card p { margin: 0; color: var(--muted); line-height: 1.55; }

.document {
  max-width: 760px;
  padding: 66px 0 90px;
}

.document h1 { font-size: clamp(42px, 7vw, 68px); }
.document .updated { color: var(--muted); margin: 18px 0 45px; }
.document h2 { margin: 42px 0 12px; font-size: 25px; letter-spacing: -.03em; }
.document h3 { margin: 28px 0 8px; font-size: 18px; }
.document p, .document li { color: #57534b; line-height: 1.68; }
.document li + li { margin-top: 8px; }

.notice {
  margin: 30px 0;
  padding: 20px 22px;
  border: 1px solid #f4c9bf;
  border-radius: 18px;
  background: var(--coral-soft);
}

.notice p { margin: 0; color: #754338; }

.support-list {
  display: grid;
  gap: 12px;
  margin: 32px 0;
}

.support-list details {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
}

.support-list summary { cursor: pointer; font-weight: 680; }
.support-list details p { margin-bottom: 0; }

.button {
  display: inline-block;
  margin-top: 18px;
  padding: 13px 18px;
  border-radius: 999px;
  background: var(--ink);
  color: white;
  font-weight: 680;
  text-decoration: none;
}

.button:hover { color: white; background: var(--coral); }

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 0 38px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 720px) {
  nav { gap: 12px; }
  .hero { padding-top: 55px; }
  .grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
}