:root {
  --bg: #f7f6f2;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --accent: #2f6b4f;
  --border: #e4e1d8;
  --max: 42rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP",
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(47, 107, 79, 0.08), transparent 40%),
    linear-gradient(180deg, #fbfaf7 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

header {
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  text-decoration: none;
  margin-bottom: 0.75rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

main {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem 1.35rem;
}

@media (min-width: 640px) {
  main {
    padding: 2rem 2.25rem;
  }
}

h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.15rem;
  line-height: 1.35;
}

h2:first-child {
  margin-top: 0;
}

p,
ul {
  margin: 0 0 1rem;
  color: var(--text);
}

ul {
  padding-left: 1.2rem;
}

li {
  margin-bottom: 0.4rem;
}

li::marker {
  color: var(--accent);
}

footer {
  margin-top: 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 1.5rem;
}

.card-list {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem 1.35rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  text-decoration: none;
}

.card h2 {
  margin: 0 0 0.35rem;
  color: var(--accent);
}

.card p {
  margin: 0;
  color: var(--muted);
}