:root {
  color-scheme: light;
  --ink: #182321;
  --muted: #57645f;
  --paper: #fffdf8;
  --panel: #ffffff;
  --line: #d9dfdc;
  --accent: #176b5b;
  --accent-soft: #dff2eb;
  --warning: #7a4d00;
  --warning-soft: #fff2cc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: var(--accent);
}

header,
main,
footer {
  width: min(880px, calc(100% - 40px));
  margin-inline: auto;
}

header {
  padding: 56px 0 24px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 24px;
}

h1,
h2 {
  line-height: 1.2;
}

h1 {
  margin: 18px 0 12px;
  font-size: clamp(2.25rem, 7vw, 4.5rem);
  letter-spacing: -0.04em;
}

h2 {
  margin-top: 42px;
  font-size: 1.55rem;
}

p,
li {
  max-width: 72ch;
}

pre {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  background: #f4f7f5;
  font-size: 0.9rem;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.lede {
  color: var(--muted);
  font-size: 1.2rem;
}

.card {
  margin: 26px 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  background: var(--panel);
  box-shadow: 0 14px 45px rgb(30 60 50 / 7%);
}

.notice {
  border-left: 5px solid var(--accent);
  background: var(--accent-soft);
}

footer {
  margin-top: 64px;
  border-top: 1px solid var(--line);
  padding: 24px 0 56px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 600px) {
  header {
    padding-top: 34px;
  }

  .card {
    padding: 20px;
  }
}