/* Subject pages (Class 9/10 × Science/Maths): hero + chapter tiles */
.subject-hero { margin-bottom: var(--section-gap); }
.subject-hero h1 { margin: var(--s-3) 0; max-width: 32ch; }
.subject-hero p { max-width: 46rem; font-size: var(--fs-lead); line-height: 1.7; }

.chapter-tile .eyebrow { color: var(--muted); }
.chapter-tile .card__title { margin-top: var(--s-1); }