:root {
  color-scheme: light dark;
  --background: #f7f7fa;
  --surface: #ffffff;
  --text: #121217;
  --secondary: #62636c;
  --line: #dedfe6;
  --accent: #ff165d;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #09090d;
    --surface: #151620;
    --text: #f7f7fa;
    --secondary: #a6a7b1;
    --line: #292a34;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  line-height: 1.55;
}

header,
main,
footer {
  width: min(720px, calc(100% - 40px));
  margin-inline: auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--text);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
  text-decoration: none;
}

.brand span,
a {
  color: var(--accent);
}

nav {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

nav a {
  color: var(--secondary);
  text-decoration: none;
}

main {
  padding-block: 56px 72px;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(32px, 8vw, 48px);
  letter-spacing: -1.5px;
  line-height: 1.08;
}

h2 {
  margin: 36px 0 8px;
  font-size: 20px;
  letter-spacing: -0.25px;
}

p,
li {
  color: var(--secondary);
}

.updated {
  margin: 0 0 36px;
  font-size: 14px;
}

.notice,
.contact {
  margin-block: 28px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}

ul {
  padding-left: 22px;
}

footer {
  padding-block: 24px 40px;
  border-top: 1px solid var(--line);
  color: var(--secondary);
  font-size: 13px;
}

@media (max-width: 560px) {
  header {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
  }

  main {
    padding-top: 40px;
  }
}