:root {
  color-scheme: light;
  --accent: #ff4a52;
  --ink: #2f3033;
  --secondary: #6f7075;
  --line: #e8e8eb;
  --surface: #ffffff;
  --background: #f7f7f8;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
  letter-spacing: 0;
}

body {
  margin: 0;
  color: var(--ink);
  line-height: 1.75;
}

header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
}

.nav,
main,
footer {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
}

.nav {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  color: var(--ink);
  font-size: 17px;
  font-weight: 650;
  text-decoration: none;
}

.links {
  display: flex;
  gap: 18px;
}

.links a,
a {
  color: var(--accent);
  text-decoration: none;
}

.links a {
  color: var(--secondary);
  font-size: 14px;
}

main {
  padding: 54px 0 72px;
}

h1 {
  margin: 0 0 8px;
  font-size: 34px;
  line-height: 1.25;
  font-weight: 700;
}

.summary {
  margin: 0 0 42px;
  color: var(--secondary);
  font-size: 16px;
}

.meta {
  margin: 0 0 36px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--secondary);
  font-size: 14px;
}

section {
  margin: 34px 0;
}

h2 {
  margin: 0 0 10px;
  font-size: 21px;
  line-height: 1.4;
}

h3 {
  margin: 22px 0 8px;
  font-size: 17px;
}

p,
li {
  font-size: 15px;
}

ul {
  padding-left: 22px;
}

.notice {
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: var(--surface);
}

footer {
  padding: 24px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--secondary);
  font-size: 13px;
}

@media (max-width: 560px) {
  .nav,
  main,
  footer {
    width: min(100% - 30px, 760px);
  }

  .nav {
    align-items: flex-start;
    padding: 14px 0;
    flex-direction: column;
    gap: 8px;
  }

  main {
    padding-top: 38px;
  }

  h1 {
    font-size: 29px;
  }
}