:root {
  --bg: #fff7f0;
  --card: #ffffff;
  --ink: #1b2a4a;
  --muted: #5b6475;
  --accent: #f07a2a;
  --line: #f0d8c4;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(240, 122, 42, 0.18), transparent 40%),
    linear-gradient(180deg, #fffaf5 0%, var(--bg) 100%);
  line-height: 1.7;
  padding: 32px 16px 48px;
}

main.card,
.card {
  max-width: 720px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px 24px;
  box-shadow: 0 12px 40px rgba(27, 42, 74, 0.06);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.9rem;
}

h1 {
  margin: 0 0 12px;
  font-size: 1.7rem;
  line-height: 1.35;
}

h2 {
  margin: 28px 0 8px;
  font-size: 1.15rem;
}

.lead, p, li {
  color: var(--muted);
}

.lead { margin-top: 0; }

ul.links {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  gap: 12px;
}

ul.links a,
a.button {
  display: block;
  text-decoration: none;
  color: white;
  background: var(--accent);
  padding: 14px 16px;
  border-radius: 12px;
  font-weight: 700;
  text-align: center;
}

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

nav.top {
  max-width: 720px;
  margin: 0 auto 16px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

nav.top a {
  text-decoration: none;
  font-weight: 600;
}

footer {
  max-width: 720px;
  margin: 20px auto 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

ul.content {
  padding-left: 1.2em;
}

.updated {
  font-size: 0.9rem;
  color: var(--muted);
}