.learning-intro { padding: 64px 0 42px; }
.learning-intro h1 { font-size: clamp(36px, 4.5vw, 60px); font-weight: 500; line-height: 1.08; letter-spacing: -.045em; margin: 0 0 22px; }
.learning-intro h1 span { color: var(--muted); }
.learning-intro > p:last-child { max-width: 52ch; color: var(--muted); font-size: 15px; }
.learning-tabs { display: flex; gap: 32px; border-bottom: 1px solid var(--line-2); }
.learning-tabs a { padding: 17px 0; border-bottom: 2px solid transparent; font-size: 14px; color: var(--muted); }
.learning-tabs a[aria-selected="true"] { color: var(--text); border-color: var(--accent); }
.learning-tabs a span { margin-left: 9px; color: var(--faint); font: 11px var(--mono); }
.learning-panel[hidden] { display: none; }
.tutorial-series, .manual-section { padding: 38px 0 52px; border-top: 0; }
.series-heading { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: end; margin-bottom: 28px; }
.series-heading .eyebrow { margin-bottom: 12px; color: var(--accent); }
.home .series-heading h2 { font-size: clamp(23px, 2.5vw, 32px); }
.series-heading > p { max-width: 54ch; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.lesson-grid { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.lesson { border: 1px solid var(--line-2); background: var(--bg-2); min-width: 0; }
.lesson-player { aspect-ratio: 16 / 9; position: relative; background: #080808; }
.lesson-player img, .lesson-player iframe { width: 100%; height: 100%; object-fit: cover; border: 0; display: block; }
.lesson-player > [hidden] { display: none; }
.lesson-cover { display: block; overflow: hidden; }
.cover-play { position: absolute; inset: 0; display: grid; place-items: center; background: #0002; }
.lesson-cover:hover .play-symbol { background: #ff8350; }
.play-lesson { position: absolute; inset: 0; border: 0; background: linear-gradient(transparent 30%, #0009); color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 12px; font: 500 12px var(--sans); }
.play-lesson[hidden] { display: none; }
.play-symbol { display: grid; place-items: center; width: 54px; height: 54px; border-radius: 50%; background: var(--accent); color: var(--on-accent); padding-left: 3px; font-size: 18px; }
.play-lesson:hover .play-symbol { background: #ff8350; }
.duration { position: absolute; bottom: 12px; right: 12px; padding: 3px 7px; background: #080808e8; color: #fff; font: 11px var(--mono); border-radius: 2px; pointer-events: none; }
.lesson-copy { padding: 23px 26px 26px; }
.lesson-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 0 0 14px; color: var(--accent); font: 10px/1.5 var(--mono); letter-spacing: .05em; }
.lesson-meta span { color: var(--faint); }
.lesson-copy h3 { font-size: 24px; font-weight: 500; letter-spacing: -.025em; margin: 0 0 12px; }
.lesson-copy > p:not(.lesson-meta) { color: var(--muted); font-size: 13px; line-height: 1.8; margin: 0 0 22px; max-width: 60ch; }
.manual-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.manual-card { border: 1px solid var(--line-2); background: var(--bg-2); padding: 30px; display: flex; flex-direction: column; align-items: flex-start; }
.manual-card .eyebrow { margin-bottom: 22px; }
.manual-card h3 { margin: 0 0 18px; font-size: 26px; font-weight: 500; line-height: 1.2; letter-spacing: -.025em; }
.manual-card > p:not(.eyebrow) { color: var(--muted); font-size: 14px; max-width: 48ch; }
.manual-card .access-note { font-size: 12px !important; color: var(--faint) !important; margin-top: auto; padding-top: 18px; }
.manual-card .text-link { margin-top: 10px; }
.learning-help { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 28px 0; margin-bottom: 35px; border-top: 1px solid var(--line); }
.home .learning-help h2 { font-size: 21px; }
.learning-help p { color: var(--muted); font-size: 13px; margin-bottom: 0; }
@media (max-width: 760px) {
  .learning-intro { padding-top: 38px; }
  .series-heading { grid-template-columns: 1fr; gap: 18px; }
  .lesson-grid, .manual-grid { grid-template-columns: 1fr; }
  .learning-help { align-items: flex-start; flex-direction: column; }
  .learning-tabs { gap: 24px; }
  .lesson-copy, .manual-card { padding: 24px; }
}
.lesson-breadcrumb { display: flex; flex-wrap: wrap; gap: 10px; padding-top: 30px; font-size: 11px; color: var(--muted); }
.lesson-breadcrumb > span[aria-hidden] { color: var(--line-2); }
.lesson-heading { padding: 38px 0 30px; max-width: 880px; }
.lesson-heading .eyebrow { color: var(--accent); margin-bottom: 14px; }
.lesson-heading h1 { font-size: clamp(32px, 4vw, 52px); line-height: 1.12; font-weight: 500; letter-spacing: -.035em; margin: 0 0 18px; }
.lesson-heading > p:not(.eyebrow) { max-width: 72ch; color: var(--muted); font-size: 15px; line-height: 1.8; margin-bottom: 20px; }
.lesson-facts { display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--faint); font: 11px var(--mono); }
.lesson-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 40px; padding-bottom: 56px; }
.lesson-main, .lesson-sidebar { min-width: 0; }
.lesson-main > .lesson-player { border: 1px solid var(--line-2); }
.lesson-video-links { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 18px; padding-block: 20px; }
.lesson-outline { padding-block: 26px; }
.home .lesson-outline h2, .home .lesson-sidebar h2 { font-size: 22px; }
.lesson-outline ol { color: var(--muted); padding-left: 22px; font-size: 14px; line-height: 1.8; }
.lesson-outline li { padding: 6px 0 6px 8px; }
.lesson-pagination { border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 22px; padding-top: 23px; font-size: 14px; }
.lesson-pagination a span { display: block; margin-bottom: 7px; font: 10px var(--mono); color: var(--faint); }
.lesson-sidebar { align-self: start; border: 1px solid var(--line-2); background: var(--bg-2); padding: 24px; }
.lesson-series-list .eyebrow { margin-bottom: 12px; font-size: 9px; }
.lesson-series-list ol { list-style: none; padding: 0; margin: 24px 0 0; }
.lesson-series-list a { display: flex; gap: 14px; font-size: 13px; padding: 13px 0; border-top: 1px solid var(--line); }
.lesson-series-list a span { color: var(--faint); font: 12px var(--mono); padding-top: 2px; }
.lesson-series-list a[aria-current] { color: var(--accent); }
.lesson-resources { margin-top: 24px; padding-top: 24px; }
.lesson-resources h2 { margin-bottom: 20px; }
.lesson-resources > a { display: flex; justify-content: space-between; gap: 12px; font-size: 12px; padding-block: 12px; border-top: 1px solid var(--line); }
.lesson-resources p { margin: 0 0 15px; font-size: 11px; color: var(--faint); line-height: 1.7; }
@media (max-width: 980px) { .lesson-layout { grid-template-columns: minmax(0, 1fr) 240px; gap: 24px; } }
@media (max-width: 760px) { .lesson-layout { grid-template-columns: 1fr; gap: 30px; } .lesson-heading { padding-top: 28px; } .lesson-video-links .text-link { font-size: 12px; } }