@font-face{font-family:Plex;src:url('assets/plex-sans.woff2') format('woff2');font-weight:100 700;font-style:normal;font-display:swap}
:root{--nav-height:56px;--paper:#fff;--ink:#202d3a;--muted:#596774;--blue:#245b84;--pale:#eef4f8;--line:#dfe5eb;--surface:#f6f8fa;--font:Plex,system-ui,sans-serif}
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a{white-space:nowrap;flex-shrink:0;padding:12px 2px;font-size:14px;font-weight:500;color:var(--muted);text-decoration:none;border-bottom:3px solid transparent}.weeknav a[aria-current]{color:var(--blue);border-color:var(--blue)}.weeknav a:hover{color:var(--blue)}.weeknav span{display:none}.eyebrow{display:block;font-size:13px;font-weight:500;color:var(--blue);line-height:1.5;letter-spacing:0}.overview-video{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.35fr);gap:48px;align-items:center;padding:48px 0}.overview-video h1{margin:12px 0 20px;max-width:14ch}.overview-video p{max-width:42ch;color:var(--muted)}.overview-next{display:inline-block;margin-top:24px;font-size:14px;font-weight:500}.overview-watch .fallback{margin-top:10px}.overview-video .player-status:empty{display:none}.video-shell{position:relative;aspect-ratio:16/9;background:#203e56;border-radius:10px;overflow:hidden;color:white}.video-shell iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.load-video{position:absolute;inset:0;width:100%;height:100%;border:0;background:transparent;color:white;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:24px;font:400 14px/1.5 var(--font)}.load-video:hover{background:#284d69}.load-video strong{font-size:18px;font-weight:500}.load-video>span:last-child{color:#cedce6}.play-icon{display:grid;place-content:center;width:56px;height:56px;background:white;color:#245b84;border-radius:50%;padding-left:3px;margin-bottom:10px;font-size:20px}.load-video:focus-visible{outline-offset:-6px}.player-status{font-size:13px;line-height:1.5;color:var(--muted);margin:12px 0 6px;min-height:20px}.external,.fallback{font-size:13px}.fallback{display:block}.overview-hero{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:center;padding:32px;background:var(--surface);border-radius:12px;margin:8px 0 32px}.overview-hero h2{margin:8px 0 16px}.overview-hero p{max-width:55ch;color:var(--muted)}.hero-plate img{width:100%;height:235px;object-fit:contain;background:white;border-radius:8px}.hero-plate figcaption{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:var(--muted);margin-top:10px}.course-facts{display:flex;gap:32px;margin:20px 0;font-size:13px;color:var(--muted)}.course-facts span{display:flex;flex-direction:column}.course-facts b{font-size:20px;color:var(--ink);font-weight:600}.primary{display:inline-flex;gap:24px;align-items:center;background:var(--blue);color:white;padding:10px 18px;border-radius:6px;font-size:14px;font-weight:500;text-decoration:none}.primary:hover{background:#173f5d;color:white}.start-note{display:flex;gap:24px;align-items:baseline;padding:0 0 32px;margin-bottom:32px;border-bottom:1px solid var(--line)}.start-note>.eyebrow{flex-shrink:0}.start-note p{font-size:14px;color:var(--muted);max-width:75ch}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:24px}.section-heading .eyebrow{margin-bottom:8px}.week-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-bottom:56px}.week-card{border:1px solid var(--line);border-radius:10px;overflow:hidden;text-decoration:none;color:var(--ink);display:flex;flex-direction:column;transition:border-color .15s}.week-card:hover{border-color:var(--blue);color:var(--ink)}.card-image{height:190px;padding:20px;background:var(--surface)}.card-image img{width:100%;height:100%;object-fit:contain}.card-copy{padding:20px;display:flex;flex-direction:column;flex:1}.card-copy h2{font-size:21px;margin:8px 0 10px}.card-copy p{font-size:14px;color:var(--muted);margin-bottom:24px}.card-link{display:flex;justify-content:space-between;font-size:14px;font-weight:500;color:var(--blue);margin-top:auto}.week-title{display:flex;align-items:center;gap:24px;padding:36px 0 24px}.week-number{font-size:40px;font-weight:500;color:#8b9dac;font-variant-numeric:tabular-nums;line-height:1}.week-title h1{margin:8px 0 10px}.week-title p{color:var(--muted)}.review-jump{margin-left:auto;font-size:14px;white-space:nowrap}.week-summary{padding:0 0 32px;max-width:80ch}.lead{color:var(--muted)}.small-heading{font-size:16px;letter-spacing:0;margin:20px 0 8px}.outcomes{padding-left:20px;margin:0;font-size:15px}.outcomes li{padding:2px 0}.video-section{border-top:1px solid var(--line);padding-top:28px;margin-bottom:48px;scroll-margin-top:0}.video-section h2{font-size:25px}.video-grid{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(285px,1fr);gap:24px;align-items:start}.watch{position:sticky;top:calc(var(--nav-height) + 20px)}.contents{border:1px solid var(--line);border-radius:8px;overflow:hidden}.contents h3{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:16px;font-size:15px;background:var(--surface);border-bottom:1px solid var(--line)}.contents h3 span{font-size:12px;font-weight:400;color:var(--muted)}.contents ol{list-style:none;margin:0;padding:0;max-height:410px;overflow:auto}.contents .chapter{display:grid;grid-template-columns:50px 1fr 12px;gap:10px;align-items:center;padding:14px 12px;min-height:52px;border-left:3px solid transparent;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink);font-size:14px;line-height:1.45}.contents li:last-child .chapter{border-bottom:0}.chapter time{font-size:12px;font-variant-numeric:tabular-nums;color:var(--blue)}.contents .chapter:hover,.contents .chapter[aria-current]{background:var(--pale);border-left-color:var(--blue)}.contents .chapter[aria-current]{font-weight:500}.contents .chapter:focus-visible,.contents ol:focus-visible{outline-offset:-3px}.practice{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;padding:28px;background:var(--surface);border-radius:10px;margin-bottom:48px}.practice figure{min-width:0}.practice img{height:240px;width:100%;object-fit:contain;background:white;border-radius:6px}.practice figcaption{font-size:12px;color:var(--muted);margin-top:10px}.practice h2{margin:8px 0 16px}.practice p{color:var(--muted);max-width:55ch}.revision{max-width:960px;margin:auto;scroll-margin-top:0}.revision .section-heading p{font-size:14px;color:var(--muted);margin-top:12px}.question-count{display:none}.question{border-top:1px solid var(--line)}.question:last-child{border-bottom:1px solid var(--line)}.question summary{list-style:none;display:grid;grid-template-columns:28px 1fr 20px;gap:12px;align-items:center;padding:20px 12px;font-size:16px;font-weight:500;line-height:1.5}.question summary::-webkit-details-marker{display:none}.q-number{font-size:13px;font-weight:400;color:var(--muted);font-variant-numeric:tabular-nums}.plus:before{content:'+';font-size:22px;font-weight:400;color:var(--blue)}.question[open]{background:var(--surface)}.question[open] .plus:before{content:'−'}.answer{padding:0 52px 24px}.answer .eyebrow{font-size:12px;color:var(--muted)}.answer p{max-width:70ch;margin:8px 0 12px;font-size:15px}.review-link{font-size:13px}.page-turn{display:flex;justify-content:space-between;gap:24px;padding:32px 0 48px;font-size:14px;font-weight:500}footer{border-top:1px solid var(--line);padding-top:24px;padding-bottom:32px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:var(--muted)}footer a{overflow-wrap:anywhere}.skip{position:fixed;top:8px;left:8px;padding:10px 20px;background:white;z-index:30;transform:translateY(-150%)}.skip:focus{transform:none}
@media(max-width:960px){.overview-video{gap:28px}.week-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.week-title{flex-wrap:wrap}.review-jump{margin-left:64px}.video-grid{grid-template-columns:minmax(0,1.3fr) minmax(265px,1fr)}}
@media(max-width:720px){.masthead,.weeknav,main,footer{padding-left:20px;padding-right:20px}.masthead{padding-top:20px;padding-bottom:16px;gap:16px}.brand{font-size:19px}.brand span{font-size:11px}.edition{font-size:11px}.weeknav{gap:22px}.weeknav a{font-size:13px;padding:12px 0}.overview-video{grid-template-columns:1fr;padding:28px 0;gap:24px}.overview-video h1{max-width:none;font-size:32px;margin:8px 0 14px}.overview-video p{font-size:15px}.overview-next{margin-top:16px}.overview-hero{grid-template-columns:1fr;gap:24px;padding:22px;margin-top:0}.overview-hero h2{font-size:25px}.hero-plate img{height:200px}.course-facts{gap:24px}.start-note{display:block;margin-bottom:28px;padding-bottom:24px}.start-note p{margin-top:8px}.week-cards{grid-template-columns:1fr;gap:20px;margin-bottom:36px}.card-image{height:215px}.section-heading{flex-wrap:wrap;gap:12px}.section-heading h2{font-size:24px}.week-title{gap:14px;padding:28px 0 20px}.week-number{display:none}.week-title h1{font-size:30px}.week-title .eyebrow{font-size:11px}.review-jump{margin:0}.week-title p{font-size:15px}.video-grid{display:block}.watch{position:relative;top:auto;margin-bottom:20px}.contents ol{max-height:none;overflow:visible}.video-section{margin-bottom:36px}.practice{grid-template-columns:1fr;padding:20px;gap:24px;margin-bottom:36px}.practice img{height:220px}.practice h2{font-size:24px}.question summary{padding:18px 4px;gap:8px;font-size:15px;grid-template-columns:24px 1fr 18px}.answer{padding:0 16px 20px 36px}.page-turn{padding-bottom:36px}footer{flex-direction:column;gap:8px}.hero-plate figcaption{font-size:11px}.eyebrow{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

.video-shell[data-release-week]{background:var(--surface);border:1px solid var(--line)}
[data-release-week] .load-video{color:var(--ink)}
[data-release-week] .load-video:hover{background:var(--pale)}
[data-release-week] .load-video>span:last-child{color:var(--muted)}
[data-release-week] .play-icon{background:var(--line);color:var(--muted)}