:root {
  color-scheme: light;
  --bg: #f6f8f5;
  --paper: #ffffff;
  --ink: #16221c;
  --muted: #5d6b64;
  --line: #dfe6df;
  --accent: #166c4d;
  --accent-soft: #e2f3ea;
  --warn: #7a4b00;
  --warn-bg: #fff3d6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
  font-weight: 700;
}

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

header {
  border-bottom: 1px solid var(--line);
  background: rgba(246, 248, 245, 0.92);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
}

.brand {
  color: var(--ink);
  font-size: 1.2rem;
  font-weight: 850;
  text-decoration: none;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.links a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

main {
  padding: 56px 0 72px;
}

.hero {
  margin-bottom: 34px;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 10px 0 14px;
  font-size: clamp(2.05rem, 6vw, 4.2rem);
  line-height: 1.03;
}

h2 {
  margin: 36px 0 10px;
  font-size: 1.35rem;
}

p,
li {
  color: var(--muted);
  font-size: 1rem;
}

.lead {
  max-width: 720px;
  font-size: 1.12rem;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  padding: 24px;
}

.notice {
  border-color: #f0cc7a;
  background: var(--warn-bg);
}

.notice strong {
  color: var(--warn);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  padding: 20px;
  text-decoration: none;
}

.card strong {
  display: block;
  color: var(--ink);
  font-size: 1.06rem;
}

.card span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-weight: 500;
}

code {
  border-radius: 5px;
  background: var(--accent-soft);
  color: var(--ink);
  padding: 0.12rem 0.32rem;
}

footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 36px;
  color: var(--muted);
}

@media (max-width: 720px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

  .links {
    gap: 10px 14px;
  }

  main {
    padding-top: 36px;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}