.maths-explained { --review-muted: #526179; }
.maths-explained main { line-height: 1.65; }
.maths-explained main h1, .maths-explained main h2, .maths-explained main h3 { letter-spacing: 0; line-height: 1.16; color: var(--camloc-ink); }
.maths-explained main h1 { font-size: 48px; margin: 10px 0 18px; }
.maths-explained main h2 { font-size: 32px; margin: 8px 0 20px; }
.maths-explained main h3 { font-size: 22px; margin: 16px 0 10px; }
.maths-explained main p { color: var(--review-muted); }
.maths-explained .kicker { color: var(--camloc-blue); font-size: 12px; font-weight: 800; letter-spacing: 0; margin: 0 0 10px; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 10px; color: #59697b; font-size: 13px; margin-bottom: 30px; }
.breadcrumbs a:hover { color: var(--camloc-blue); text-decoration: underline; }
.library-heading, .lesson-heading { padding-top: 24px; padding-bottom: 30px; }
.maths-explained .intro { font-size: 18px; line-height: 1.65; max-width: 720px; margin: 0; }
.featured-lesson { display: grid; grid-template-columns: minmax(0,1.65fr) minmax(0,1fr); gap: 40px; align-items: center; padding: 0 0 64px; }
.video-cover, .video-player { position: relative; display: block; background: #0e1824; overflow: hidden; border-radius: 8px; aspect-ratio: 16 / 9; }
.video-cover img, .video-launch img { width: 100%; height: 100%; object-fit: cover; transition: opacity 180ms ease; }
.video-cover:hover img, .video-launch:hover img { opacity: .85; }
.watch-chip { position: absolute; bottom: 20px; left: 20px; display: inline-flex; align-items: center; gap: 12px; border-radius: 6px; background: white; color: var(--camloc-navy); padding: 13px 18px; font-size: 14px; font-weight: 800; box-shadow: 0 4px 20px #0002; }
.watch-chip > span { color: var(--camloc-blue); }
.featured-copy { padding-block: 12px; }
.maths-explained .featured-copy h2 { font-size: 36px; }
.feature-deck { font-size: 17px; margin-block: 16px 20px; }
.topic-list { padding: 0; margin: 0 0 24px; display: flex; flex-wrap: wrap; column-gap: 24px; row-gap: 8px; list-style: none; font-size: 12px; color: #476373; }
.topic-list li { border-bottom: 2px solid #beddd6; padding-bottom: 4px; }
.lesson-link { gap: 18px; }
.access-note { font-size: 12px; margin: 12px 0 0; }
.learning-band { background: #f3f8fb; border-block: 1px solid #e1ebf2; }
.learning-band > .container:not(.next-step) { padding-block: 48px; }
.learning-columns { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 44px; margin-top: 30px; }
.learning-columns > div + div { border-left: 1px solid #cedee9; padding-left: 30px; }
.step-number { font-size: 13px; font-weight: 800; color: #397f77; }
.learning-columns p { margin-bottom: 0; font-size: 15px; }
.next-step { padding-block: 56px; display: flex; justify-content: space-between; align-items: center; gap: 36px; }
.next-step p { max-width: 650px; margin-bottom: 0; }
.next-actions { display: flex; align-items: flex-start; flex-direction: column; gap: 14px; flex-shrink: 0; }
.text-link { color: var(--camloc-blue); font-weight: 750; font-size: 14px; text-decoration: underline; text-underline-offset: 5px; }
.lesson-nav { display: flex; gap: 24px; flex-wrap: wrap; margin-top: 26px; padding-top: 18px; border-top: 1px solid #dce5ee; font-size: 14px; font-weight: 700; color: var(--camloc-blue); }
.lesson-nav a:hover { text-decoration: underline; text-underline-offset: 4px; }
.watch-section { max-width: 1000px; }
.video-launch { width: 100%; height: 100%; padding: 0; border: 0; background: none; cursor: pointer; display: block; }
.video-launch:focus-visible { outline-offset: -5px; }
.video-player iframe { display: block; width: 100%; height: 100%; border: 0; }
.video-caption { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; margin-top: 12px; font-size: 12px; color: var(--review-muted); }
.video-caption a { color: var(--camloc-blue); text-decoration: underline; }
.lesson-content { display: grid; grid-template-columns: minmax(0,2.15fr) minmax(0,1fr); gap: 88px; padding-top: 56px; padding-bottom: 64px; }
.lesson-main > section { scroll-margin-top: 110px; }
#watch { scroll-margin-top: 105px; }
.lesson-main > section + section { margin-top: 40px; padding-top: 36px; border-top: 1px solid #dce5ee; }
.lesson-aside { border-left: 1px solid #dce5ee; padding-left: 28px; }
.maths-explained .lesson-aside h2 { font-size: 25px; }
.focus-list { margin: 24px 0; padding-left: 18px; font-size: 15px; color: var(--review-muted); }
.focus-list li { margin-bottom: 16px; padding-left: 4px; }
.focus-list li::marker { color: #328075; }
.aside-related { border-top: 1px solid #dce5ee; padding-top: 26px; display: grid; gap: 18px; }
.pair-demo { background: #eef7f4; border-left: 3px solid #328075; padding: 18px 24px; margin-block: 26px; max-width: 480px; font-size: 22px; color: #204d46; font-variant-numeric: tabular-nums; }
.pair-demo > div { display: grid; grid-template-columns: 1fr 24px 1fr 24px 1fr; text-align: center; gap: 10px; padding: 6px 0; }
.reasoning-note { font-size: 15px; }
.practice-sum { color: var(--camloc-navy); font-size: 27px; font-weight: 750; margin-block: 24px; }
.lesson-main details { background: #fff; border-top: 1px solid #dce5ee; }
.lesson-main details:last-child { border-bottom: 1px solid #dce5ee; }
.lesson-main summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; font-weight: 700; font-size: 15px; color: var(--camloc-navy); }
.lesson-main summary::-webkit-details-marker { display: none; }
.lesson-main summary span { color: var(--camloc-blue); font-size: 20px; line-height: 1; }
.lesson-main details[open] summary span { transform: rotate(45deg); }
.lesson-main details > p, .lesson-main details > ul { margin: 0 0 18px; color: var(--review-muted); font-size: 15px; }
.lesson-main details li { margin-bottom: 14px; }
.maths-explained .site-footer { margin-top: 0; }
.maths-video-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; padding-bottom: 42px; }
.maths-explained .maths-video-card h2 { font-size: 24px; }
.maths-explained .maths-video-card { border: 1px solid #dce5ee; border-radius: 8px; overflow: hidden; }
.maths-video-card .featured-copy { padding: 24px; }
.maths-video-card .video-cover { border-radius: 0; }
.maths-library .pagination { padding-bottom: 36px; }
.maths-library .page-numbers { display: inline-flex; min-width: 44px; min-height: 44px; justify-content: center; align-items: center; padding: 8px; color: var(--camloc-blue); }
.maths-library .page-numbers.current { background: var(--camloc-light); font-weight: 800; }
.maths-home { border-top: 1px solid #e1ebf2; padding-top: 54px; }
.maths-home h2 { font-size: 32px; line-height: 1.2; letter-spacing: 0; }
.maths-home p { line-height: 1.65; color: var(--review-muted, #526179); }
.maths-home .featured-lesson { padding-bottom: 48px; }
.maths-home .kicker { color: var(--camloc-blue); font-size: 12px; font-weight: 800; }
.key-idea img { height: auto; }
.key-idea p, .practice-section p, .teaching-section p, .featured-copy h2 { overflow-wrap: anywhere; }
@media (max-width: 850px) {
  .maths-video-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .featured-lesson { grid-template-columns: 1fr; gap: 24px; }
  .featured-copy { padding: 0; max-width: 640px; }
  .featured-copy br { display: none; }
  .lesson-content { grid-template-columns: 1fr; gap: 38px; }
  .lesson-aside { border-left: 0; border-top: 1px solid #dce5ee; padding: 28px 0 0; }
  .next-step { align-items: flex-start; flex-direction: column; }
  .learning-columns { gap: 22px; }
  .learning-columns > div + div { padding-left: 20px; }
}
@media (max-width: 560px) {
  .maths-video-grid { grid-template-columns: 1fr; }
  .maths-explained main h1 { font-size: 34px; }
  .maths-explained main h2, .maths-explained .featured-copy h2 { font-size: 28px; }
  .maths-explained .intro { font-size: 16px; }
  .breadcrumbs { font-size: 12px; margin-bottom: 24px; }
  .featured-lesson { padding-bottom: 40px; }
  .watch-chip { left: 12px; bottom: 12px; font-size: 13px; padding: 10px 14px; }
  .learning-columns { grid-template-columns: 1fr; gap: 26px; }
  .learning-columns > div + div { border-left: 0; border-top: 1px solid #cedee9; padding: 24px 0 0; }
  .lesson-nav { gap: 18px; font-size: 13px; }
  .lesson-content { padding-top: 38px; }
  .pair-demo { padding: 16px 12px; font-size: 20px; }
  .practice-sum { font-size: 22px; }
  .next-step { padding-block: 40px; }
}
@media (prefers-reduced-motion: reduce) { .video-cover img, .video-launch img { transition: none; } }