:root{--ink:#182c36;--teal:#075b57;--muted:#52636d;--line:#dce4e6;--paper:#f5f8f9}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.6}a{color:inherit;text-decoration:none}a:focus-visible{outline:3px solid #d18b20;outline-offset:5px}header{max-width:1328px;margin:auto;min-height:108px;padding:24px 48px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:13px;font-weight:700}.brand small{display:block;font-size:13px;font-weight:400;color:var(--muted)}.mark{background:var(--teal);color:#fff;padding:8px 11px;border-radius:9px;font-size:21px;letter-spacing:-1px}.home-link{font-size:14px;font-weight:600}.home-link span{margin-left:18px;color:var(--teal)}main{max-width:1328px;margin:auto;padding:0 48px}.intro{padding:52px 0 54px;display:grid;grid-template-columns:1.8fr 1fr;align-items:center;gap:64px;border-top:1px solid var(--line)}.eyebrow{font-size:12px;font-weight:700;letter-spacing:1.9px;color:var(--teal);margin:0 0 22px}h1{font-size:clamp(30px,3.25vw,46px);line-height:1.22;letter-spacing:-1.4px;margin:0;font-weight:650}h1 em{display:block;color:var(--teal);font-style:normal}.lede{color:var(--muted);max-width:610px;margin:24px 0 0}.numbers{border-left:1px solid #b9cecd;padding-left:46px;color:var(--teal)}.numbers strong{font-size:86px;letter-spacing:-6px;line-height:1;display:block;font-weight:400}.numbers strong span{font-size:16px;letter-spacing:0;display:block;margin:14px 0 26px}.numbers>div{font-size:12px;color:var(--muted)}.numbers>div span{color:#a3b8b7;padding:0 3px}.directory{border-top:1px solid var(--line);padding-top:32px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:37px}h2{font-size:24px;line-height:1.4;margin:0}.section-head>span{font-size:14px;color:var(--muted)}.group{margin:0 0 42px}.group-heading{display:flex;align-items:center;gap:15px;margin:0 0 18px}.group-heading h3{font-size:18px;line-height:1.45;margin:0;font-weight:600}.group-number{font-size:14px;color:var(--teal);font-weight:700;background:#e1eeec;border-radius:6px;padding:5px 10px}.count{margin-left:auto;white-space:nowrap;font-size:13px;color:var(--muted)}.unit-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.unit-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:23px 22px 17px;display:flex;flex-direction:column;min-height:198px;transition:border-color .16s,transform .16s,box-shadow .16s}.unit-card:hover{border-color:#3f8580;transform:translateY(-3px);box-shadow:0 7px 20px #132d3610}.unit-index{font-size:12px;letter-spacing:1px;color:var(--muted)}.unit-card h4{font-size:17px;line-height:1.48;font-weight:600;margin:14px 0 22px}.card-bottom{margin-top:auto;display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:13px}.card-bottom>span:last-child{font-size:20px;color:var(--teal)}.source{font-size:13px;color:var(--muted);margin:36px 0 46px;max-width:780px}.source a{text-decoration:underline;text-underline-offset:3px}footer{border-top:1px solid var(--line);max-width:1232px;padding:26px 0;margin:0 auto;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:var(--muted)}.skip{position:absolute;top:-100px;background:white;padding:16px;z-index:2}.skip:focus{top:0}.breadcrumb{display:flex;gap:12px;flex-wrap:wrap;font-size:14px;color:var(--muted);padding:25px 0;border-top:1px solid var(--line)}.breadcrumb a{color:var(--teal)}.lesson-title{padding:28px 0 38px;max-width:930px}.lesson-title>p:last-child{color:var(--muted);margin-top:20px}.lesson-grid{display:grid;grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);gap:56px;border-top:1px solid var(--line);padding-top:36px}.lesson-section{padding:0 0 34px;margin-bottom:32px;border-bottom:1px solid var(--line);min-height:155px}.lesson-section h2{display:flex;gap:15px;align-items:center}.lesson-section h2 span{font-size:13px;color:var(--teal)}.placeholder-copy{color:var(--muted);border-left:2px solid #bed3d0;padding-left:18px;margin:24px 0}.lesson-section p{white-space:pre-line}aside>h2{font-size:18px;margin-bottom:22px}.media-block{background:white;border:1px solid var(--line);border-radius:12px;padding:22px;margin-bottom:20px}.media-label{display:flex;gap:12px;align-items:center}.media-label>span{font-size:25px;color:var(--teal)}.media-label h3{font-size:16px;margin:0}.media-block p{font-size:14px;color:var(--muted)}.pending{font-size:12px;display:inline-block;background:#edf2f3;color:#56666f;padding:3px 9px;border-radius:4px;margin-top:8px}.video-placeholder{aspect-ratio:16/9;background:#eaf1f1;border-radius:7px;margin-top:18px;display:flex;flex-direction:column;align-items:center;justify-content:center}.video-placeholder>span{font-size:35px;color:#648d89}.video-placeholder p{margin:0}audio,video,iframe{width:100%;margin-top:18px;border:0}iframe,video{aspect-ratio:16/9}.lesson-nav{display:grid;grid-template-columns:1fr 1fr;gap:40px;border-top:1px solid var(--line);padding:30px 0 55px;margin-top:30px}.lesson-nav a:last-child{text-align:right}.lesson-nav small{font-size:14px;color:var(--teal);display:block;margin-bottom:8px}.lesson-nav span{font-weight:600;font-size:16px;display:block}.lesson-nav a:hover span{text-decoration:underline}@media(max-width:1050px){.unit-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.intro{gap:30px}.numbers{padding-left:30px}.lesson-grid{gap:28px}footer{margin:0 48px}}@media(max-width:680px){header{padding:20px;min-height:90px}.brand{font-size:14px}.brand small{font-size:12px}.home-link{font-size:12px}.home-link span{display:none}main{padding:0 20px}.intro{grid-template-columns:1fr;padding:32px 0;gap:24px}.numbers{display:none}h1{letter-spacing:-.7px}.section-head{align-items:flex-start;flex-direction:column;gap:8px;margin-bottom:26px}.section-head h2{font-size:22px}.group-heading{gap:10px;align-items:flex-start}.group-heading h3{font-size:16px}.count{display:none}.unit-grid{gap:10px}.unit-card{padding:17px 14px;min-height:195px}.unit-card h4{font-size:16px}.card-bottom{font-size:12px}.lesson-grid{grid-template-columns:1fr;gap:5px}.lesson-title{padding-top:16px}.lesson-title h1{font-size:32px}.lesson-nav{gap:20px}.lesson-nav span{font-size:14px}footer{margin:0 20px;flex-direction:column;gap:8px}.source{margin-top:24px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.unit-card{transition:none}}
/* Full-length self-study reading surfaces. */
.reading p{line-height:1.85;margin:20px 0;white-space:pre-line;overflow-wrap:anywhere}.reading h3{font-size:19px;line-height:1.5;margin:32px 0 14px;color:var(--teal)}.reading h2{margin-top:32px}.reading a{color:var(--teal);text-decoration:underline;text-underline-offset:3px;overflow-wrap:anywhere}.lesson-grid{grid-template-columns:minmax(0,2.5fr) minmax(240px,1fr);gap:48px}.lesson-section h2{margin-top:0}.lesson-section{scroll-margin-top:24px}.unit-notice{font-size:14px;color:var(--muted);margin:0 0 20px}.section-nav{display:flex;flex-wrap:wrap;gap:12px 24px;padding:17px 0 25px;font-size:14px;font-weight:600;color:var(--teal)}.section-nav a:hover{text-decoration:underline}.unit-context{background:#eaf1f1;border-radius:10px;padding:24px;margin-bottom:28px;scroll-margin-top:24px}.unit-context h2{font-size:20px;margin-top:0}.unit-context p{font-size:14px}.unit-context details{border-top:1px solid #c5d7d4;padding-top:18px;margin-top:20px}.unit-context summary{font-size:14px;cursor:pointer;font-weight:600}.unit-context summary:focus-visible{outline:3px solid #d18b20;outline-offset:4px}.provenance{border-top:1px solid var(--line);padding:30px 0 45px;max-width:850px}.provenance p{font-size:15px}.supplement-link{padding:28px;background:#e1eeec;border-radius:12px;margin:32px 0 40px}.supplement-link a{color:var(--teal);font-weight:600;text-decoration:underline;text-underline-offset:4px}.supplement{max-width:1000px;padding-bottom:36px}.supplement>h1{margin:22px 0 32px}.supplement h2{padding-top:22px;border-top:1px solid var(--line);margin-top:36px}.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:8px;margin:28px 0;max-width:100%}table{border-collapse:collapse;font-size:14px;background:white;width:100%;min-width:700px}th,td{padding:14px;vertical-align:top;text-align:left;border-bottom:1px solid var(--line);border-right:1px solid var(--line)}th{background:#e1eeec;color:var(--teal)}footer a{text-decoration:underline;text-underline-offset:3px}@media(max-width:800px){.lesson-grid{grid-template-columns:minmax(0,1fr);gap:20px}.unit-context{padding:20px}.reading p{line-height:1.8}.section-nav{gap:12px 18px}.supplement-link{padding:22px}.lesson-title h1{overflow-wrap:anywhere}.supplement h1{font-size:30px}}

.course-overview{border-top:1px solid var(--line);padding:32px 0 22px;scroll-margin-top:24px}.overview-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}.overview-grid h3{font-size:21px;line-height:1.5;margin:8px 0 20px}.overview-grid .eyebrow{font-size:12px;margin-bottom:12px;letter-spacing:.5px}.overview-grid video{background:#132d36;border-radius:8px}.recording-title{line-height:1.6}.media-block audio{min-width:0;width:100%;display:block}@media(max-width:800px){.overview-grid{grid-template-columns:1fr;gap:0}}

.media-availability{margin:0 0 2rem;padding:1.5rem;border:1px solid #cbdad7;border-radius:16px;background:#f3f8f7}.media-availability h2{margin:0 0 1rem;font-size:1.25rem}.availability-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1.25rem;margin:0}.availability-grid dt{font-size:.95rem}.availability-grid dd{margin:.35rem 0 0;font-size:1.4rem;font-weight:700;color:#075b57}.media-availability>p{margin:1rem 0 0;font-size:.9rem}@media(max-width:700px){.availability-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}