:root {
  color-scheme: light;
  --bg: #f7f7f8;
  --card: #ffffff;
  --ink: #171717;
  --muted: #5f6368;
  --line: #e7e7ea;
  --brand: #d2000a;
  --brand-dark: #9f0008;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.58;
}

.page {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.shell {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 18px 44px rgba(18, 18, 18, 0.06);
  overflow: hidden;
}

header {
  padding: 32px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 14px;
  background: var(--brand);
  color: #fff;
  font-weight: 900;
  letter-spacing: 0;
}

.brand-name {
  font-size: 18px;
  font-weight: 800;
}

h1 {
  margin: 0;
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}

.lead {
  max-width: 720px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 18px;
}

main {
  padding: 32px;
}

h2 {
  margin: 32px 0 10px;
  font-size: 21px;
  line-height: 1.25;
}

h2:first-child {
  margin-top: 0;
}

p,
li {
  font-size: 16px;
}

p {
  margin: 0 0 14px;
}

ul {
  margin: 0 0 18px;
  padding-left: 22px;
}

a {
  color: var(--brand-dark);
  font-weight: 700;
}

.meta {
  color: var(--muted);
  font-size: 14px;
}

.notice {
  margin: 24px 0;
  padding: 16px 18px;
  border: 1px solid rgba(210, 0, 10, 0.18);
  border-radius: 16px;
  background: rgba(210, 0, 10, 0.05);
}

footer {
  padding: 24px 32px 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

nav a {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 16px;
  text-decoration: none;
}

@media (max-width: 640px) {
  .page {
    width: min(100% - 20px, 920px);
    padding: 20px 0 36px;
  }

  header,
  main,
  footer {
    padding-left: 20px;
    padding-right: 20px;
  }
}