:root {
  --brand-red: #9c0000;
  --brand-red-hover: #ce0000;
  --brand-green: #70b305;
  --text: #363635;
  --muted: #666666;
  --line: #e4e4e4;
  --surface: #f7f7f7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--text);
  font-family: Verdana, Geneva, sans-serif;
  font-size: 15px;
  line-height: 1.65;
}

.page {
  width: min(860px, calc(100% - 32px));
  margin: 48px auto;
}

header {
  border-bottom: 4px solid var(--brand-green);
  margin-bottom: 32px;
  padding-bottom: 20px;
}

h1,
h2 {
  color: var(--text);
  line-height: 1.25;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(26px, 4vw, 38px);
}

h2 {
  margin-top: 32px;
  font-size: 20px;
}

p,
ul {
  margin: 0 0 16px;
}

a {
  color: var(--brand-red);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover,
a:focus-visible {
  color: var(--brand-red-hover);
}

.intro,
.notice {
  background: var(--surface);
  border-left: 5px solid var(--brand-green);
  padding: 18px 20px;
}

.meta {
  color: var(--muted);
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  margin-top: 40px;
  padding-top: 20px;
}

footer a + a::before {
  color: var(--muted);
  content: " | ";
  text-decoration: none;
}

@media (max-width: 540px) {
  .page {
    margin: 24px auto;
  }
}