:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --blue: #2563eb;
  --blue-soft: #dbeafe;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  line-height: 1.75;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.page {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.topnav {
  display: flex;
  gap: 16px;
  justify-content: flex-end;
  margin-bottom: 28px;
  font-weight: 700;
}

.hero {
  padding: 56px 0 28px;
}

.hero.compact {
  padding-top: 16px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--blue);
  font-weight: 800;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 18px;
  font-size: 28px;
  line-height: 1.3;
  letter-spacing: 0;
}

h3 {
  margin: 28px 0 8px;
  font-size: 20px;
  letter-spacing: 0;
}

.lead {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font-weight: 800;
}

.button.primary {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}

.card {
  margin-top: 24px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.06);
}

.info-list {
  margin: 0;
}

.info-list div {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 20px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.info-list div:first-child {
  border-top: 0;
}

.info-list dt {
  color: var(--muted);
  font-weight: 700;
}

.info-list dd {
  margin: 0;
  font-weight: 700;
}

.prose p {
  margin: 0 0 18px;
}

.prose ul {
  margin: 0 0 22px;
  padding-left: 1.2em;
}

.notice {
  margin: 12px 0 24px;
  padding: 18px;
  border-radius: 8px;
  background: var(--blue-soft);
}

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

@media (max-width: 640px) {
  .page {
    width: min(100% - 24px, 920px);
    padding-top: 20px;
  }

  .hero {
    padding-top: 36px;
  }

  .card {
    padding: 22px;
  }

  .info-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}