:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #5d6a76;
  --line: #d9e2ea;
  --panel: #f6f8fa;
  --accent: #0b7f83;
  --danger: #b4233a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  background: #fff;
}

header,
main,
footer {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  padding: 40px 0 18px;
  border-bottom: 1px solid var(--line);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

nav a,
.button {
  color: #fff;
  background: var(--accent);
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 6px;
  font-weight: 700;
}

main {
  padding: 28px 0 48px;
}

footer {
  padding: 22px 0 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
  margin: 0;
}

h2 {
  margin-top: 32px;
  font-size: 1.45rem;
}

p,
li {
  font-size: 1rem;
}

.lede {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 760px;
}

.notice {
  background: var(--panel);
  border-left: 4px solid var(--accent);
  padding: 14px 16px;
  margin: 22px 0;
}

.warning {
  border-left-color: var(--danger);
}

a {
  color: #075d62;
}

ul {
  padding-left: 22px;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
}