:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #171717;
  background: #f4f4f2;
  line-height: 1.6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #f4f4f2;
}

header, main, footer {
  width: min(760px, calc(100% - 40px));
  margin-inline: auto;
}

header {
  padding: 32px 0 20px;
  border-bottom: 1px solid #d8d8d3;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  color: #171717;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

a { color: #b4232c; }

main { padding: 52px 0 64px; }

h1 {
  margin: 0 0 8px;
  font-size: clamp(32px, 8vw, 48px);
  line-height: 1.1;
  letter-spacing: 0;
}

.updated {
  margin: 0 0 40px;
  color: #666;
  font-size: 14px;
}

section {
  padding: 24px 0;
  border-top: 1px solid #d8d8d3;
}

h2 {
  margin: 0 0 10px;
  font-size: 20px;
  letter-spacing: 0;
}

p, ul { margin: 0 0 12px; }
ul { padding-left: 22px; }

.answer {
  color: #3d3d3d;
}

footer {
  padding: 24px 0 40px;
  border-top: 1px solid #d8d8d3;
  color: #666;
  font-size: 13px;
}

@media (max-width: 520px) {
  header, main, footer { width: min(calc(100% - 28px), 760px); }
  nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
  .nav-links {
    flex-wrap: wrap;
    gap: 6px 18px;
    text-align: left;
  }
  main { padding-top: 38px; }
}