/* 学習の入口 */
.page-home .hero { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; padding: 48px 0 56px; }
.hero-eyebrow { color: var(--color-primary); font-size: 12px; font-weight: 700; letter-spacing: .08em; margin-bottom: 12px; }
.page-home .hero-title { font-size: clamp(28px, 3.5vw, 40px); line-height: 1.55; letter-spacing: -.04em; margin-bottom: 20px; }
.hero-title .brand { color: var(--color-primary); }
.page-home .hero-subtitle { font-size: 14px; line-height: 2; color: var(--color-text-secondary); margin-bottom: 28px; }
.hero-note { background: var(--color-primary-light); border: 1px solid var(--color-border); border-radius: 20px; padding: 28px; }
.note-label { font-size: 12px; color: var(--color-primary); font-weight: 700; }
.learning-steps { display: grid; gap: 22px; margin-top: 24px; }
.learning-steps li { display: flex; gap: 14px; align-items: flex-start; }
.learning-steps li > span { display: grid; place-items: center; flex: 0 0 32px; height: 32px; border-radius: 50%; background: white; color: var(--color-primary); font-size: 12px; font-weight: 700; }
.learning-steps strong { font-size: 14px; }
.learning-steps p { color: var(--color-text-secondary); font-size: 12px; margin-top: 4px; }
#learn { scroll-margin-top: 100px; }
.learning-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.learning-heading h2 { font-size: 24px; }
.learning-heading .hero-eyebrow { margin-bottom: 6px; }
.learning-heading > span { color: var(--color-text-secondary); font-size: 12px; }
.page-home .card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.page-home a.grade-card { display: flex; flex-direction: column; padding: 24px; border-radius: 16px; }
.grade-card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.grade-number { color: var(--color-primary); background: var(--color-primary-light); border-radius: 12px; padding: 8px 13px; font-size: 22px; font-weight: 700; }
.grade-card[data-grade="2"] .grade-number { background: #edf4fc; color: #3974ab; }
.grade-card[data-grade="3"] .grade-number { background: #eaf1f8; color: #456b95; }
.grade-subject { font-size: 12px; color: var(--color-text-secondary); }
.grade-card .card-title { font-size: 22px; margin-bottom: 10px; }
.grade-card .card-description { flex: 1; line-height: 1.8; }
.grade-card-action { display: flex; justify-content: space-between; margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--color-border); color: var(--color-primary); font-size: 14px; font-weight: 600; }
.home-footnote { margin: 26px 0 12px; text-align: center; font-size: 12px; color: var(--color-text-secondary); line-height: 1.9; }
@media (max-width: 700px) {
  .page-home .hero { grid-template-columns: 1fr; gap: 28px; padding: 24px 0 36px; }
  .hero-note { padding: 22px; }
  .learning-steps { gap: 16px; margin-top: 18px; }
  .page-home .card-grid { grid-template-columns: 1fr; }
  .learning-heading { align-items: flex-start; flex-direction: column; gap: 8px; }
  .grade-card-top { margin-bottom: 16px; }
}