:root {
  --primary: #0f766e;
  --surface: #fbfffd;
  --ink: #111816;
  --muted: #61706c;
  --line: #dce8e4;
  --soft: #edf8f5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--surface);
  color: var(--ink);
  line-height: 1.6;
}

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 20px 56px;
}

header {
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
  padding-bottom: 20px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

nav a,
.button {
  border-radius: 999px;
  background: var(--soft);
  color: var(--primary);
  display: inline-flex;
  font-weight: 800;
  padding: 8px 12px;
  text-decoration: none;
}

h1,
h2,
h3 {
  line-height: 1.18;
}

h1 {
  font-size: clamp(32px, 7vw, 52px);
  margin: 0 0 10px;
}

h2 {
  margin-top: 34px;
}

p,
li {
  color: #24302d;
}

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

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

.card {
  background: white;
  border: 1px solid var(--line);
  border-radius: 14px;
  margin: 18px 0;
  padding: 18px;
}

.notice {
  background: #fff8e6;
  border-color: #f0d28a;
}

footer {
  border-top: 1px solid var(--line);
  margin-top: 36px;
  padding-top: 18px;
}