.lesson-series { margin: 48px 0; padding: 36px; background: #f3f7f8; border-top: 3px solid #086a83; scroll-margin-top: 215px; }
.lesson-heading { display: block; margin-bottom: 28px; }
.lesson-heading h2 { font-size: clamp(26px, 3vw, 38px); line-height: 1.4; color: #173442; margin: 0 0 16px; }
.lesson-heading p { max-width: none; line-height: 1.8; font-size: 1rem; }
.lesson-kicker { color: #086a83; font-size: .875rem !important; font-weight: 700; margin: 0 0 8px; }
.lesson-count { color: #4b6370; }
.lesson-heading .lesson-instructor { margin-top: 16px; }
.lesson-instructor { display: inline-flex; align-items: center; gap: 12px; flex-shrink: 0; min-height: 56px; color: #173442; }
.lesson-instructor img { width: 56px; height: 56px; object-fit: cover; object-position: 25% 40%; border-radius: 50%; }
.lesson-instructor strong, .lesson-instructor span span { display: block; }
.lesson-instructor span span { font-size: .875rem; margin-top: 4px; }
.lesson-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.lesson-grid--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.lesson-card { background: #fff; border: 1px solid #d8e3e7; min-width: 0; }
.lesson-card > a { display: flex; flex-direction: column; height: 100%; color: #173442; }
.lesson-thumbnail { position: relative; background: #142c3b; aspect-ratio: 16 / 9; overflow: hidden; }
.lesson-thumbnail img { width: 100%; height: 100%; object-fit: contain; }
.lesson-duration { position: absolute; right: 8px; bottom: 8px; padding: 3px 6px; background: #12212bed; color: #fff; font-size: .875rem; }
.lesson-play { position: absolute; inset: 50% auto auto 50%; transform: translate(-50%, -50%); padding: 5px 17px; border-radius: 8px; background: #c8322be8; color: #fff; }
.lesson-card-copy { display: flex; flex: 1; flex-direction: column; padding: 20px; }
.lesson-card-copy h3 { font-size: 1.125rem; line-height: 1.6; margin-bottom: 10px; word-break: keep-all; }
.lesson-card-copy p { font-size: 1rem; line-height: 1.75; margin-bottom: 16px; }
.lesson-go { font-size: .875rem; font-weight: 700; margin-top: auto; color: #086a83; }
.lesson-card a:hover h3 { color: #bc302c; }
.lesson-subgroup { margin-top: 32px; }
.lesson-subgroup > h3 { margin-bottom: 18px; font-size: 1.375rem; }
.lesson-links { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 24px; }
.lesson-links a { display: inline-flex; align-items: center; min-height: 44px; font-size: 1rem; font-weight: 700; color: #086a83; border-bottom: 1px solid #aac1ca; }
.lesson-view { padding: 28px 0; border-top: 1px solid #d5e1e6; }
.lesson-view h2 { font-size: 1.625rem; margin: 24px 0 14px; }
.lesson-view h3 { font-size: 1.25rem; margin-top: 24px; }
.lesson-view > p, .lesson-view li { line-height: 1.9; font-size: 1rem; }
.lesson-view ul { padding-left: 24px; margin: 16px 0; }
.lesson-view .lesson-note { font-size: .875rem; margin-top: 24px; color: #516772; }
.lesson-sequence { padding-top: 16px; border-top: 1px solid #d5e1e6; }
.lesson-series a:focus-visible, .lesson-view a:focus-visible { outline: 3px solid #bc302c; outline-offset: 4px; }
@media (max-width: 1100px) { .lesson-heading { display: block; } .lesson-heading .lesson-instructor { margin-top: 18px; } .lesson-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .lesson-series { padding: 24px 16px; margin: 32px 0; scroll-margin-top: 90px; } .lesson-grid { grid-template-columns: 1fr; } .lesson-links { display: grid; gap: 10px; } }