:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #1f2430;
  --muted: #5b6270;
  --accent: #0f766e;
  --accent-soft: #ecfdf5;
  --border: #e5e7eb;
  --notice-bg: #fff7ed;
  --notice-border: #fdba74;
  --notice-text: #7c2d12;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  line-height: 1.6;
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

header.top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

header.top .logo {
  font-size: 1.4rem;
}

header.top .brand {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.updated {
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: -4px;
  margin-bottom: 24px;
}

h1 {
  font-size: 1.9rem;
  margin: 8px 0 4px;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.25rem;
  margin-top: 2.2em;
  margin-bottom: 0.6em;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.35em;
}

p {
  margin: 0.8em 0;
}

ul {
  margin: 0.8em 0;
  padding-left: 1.4em;
}

li {
  margin: 0.35em 0;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(15, 118, 110, 0.35);
}

a:hover {
  text-decoration-color: currentColor;
}

strong {
  font-weight: 600;
}

.notice {
  background: var(--notice-bg);
  border: 1px solid var(--notice-border);
  color: var(--notice-text);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 0.95rem;
  margin: 20px 0 32px;
}

.notice p {
  margin: 0;
}

.card-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 28px;
}

.card-links a {
  display: block;
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.card-links a:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.card-links .title {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(15, 118, 110, 0.35);
}

.card-links .desc {
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 4px;
}

footer.bottom {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

footer.bottom a {
  color: var(--muted);
}

.back-link {
  display: inline-block;
  margin-bottom: 24px;
  font-size: 0.92rem;
  color: var(--muted);
  text-decoration: none;
}

.back-link:hover {
  color: var(--accent);
}