:root {
  color-scheme: light dark;
  font-family: Inter, Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  --bg: #f4f5f2;
  --surface: #ffffff;
  --text: #151715;
  --muted: #626861;
  --line: #d4d8d2;
  --accent: #087f72;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111411;
    --surface: #1b1f1b;
    --text: #f2f4f0;
    --muted: #adb5ad;
    --line: #363c36;
    --accent: #4bc5b4;
  }
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.7;
}

header,
main,
footer {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

header strong {
  font-size: 18px;
}

nav {
  display: flex;
  gap: 14px;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

main {
  padding: 42px 0 56px;
}

h1 {
  margin: 0 0 8px;
  font-size: 32px;
}

h2 {
  margin: 34px 0 8px;
  font-size: 20px;
}

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

ul {
  padding-left: 22px;
}

.updated {
  margin: 0 0 30px;
  font-size: 14px;
}

.contact {
  margin-top: 34px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.contact strong {
  display: block;
  margin-bottom: 4px;
}

footer {
  padding: 22px 0 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 520px) {
  header {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
    padding: 14px 0;
  }

  main {
    padding-top: 30px;
  }

  h1 {
    font-size: 27px;
  }
}