:root{--ink:#f2f7ff;--muted:#b9cbe0;--line:#2a486d;--pale:#091b37;--mint:#81c3ff;color-scheme:dark}
body{background:#07162e;color:var(--ink)}
[hidden]{display:none!important}
.site-header,.site-footer{background:#07142b;border-color:#213655}
.site-footer{border-top:1px solid #213655}
.button{color:#fff;background:linear-gradient(105deg,#075ebd,#3152c2)}
.button:hover{background:linear-gradient(105deg,#006dda,#345aca)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #81c3ff;outline-offset:5px}
::selection{background:#81c3ff;color:#07162e}
.topics-hero,.catalog-hero{background:radial-gradient(ellipse 57% 110% at 87% 30%,#173f79,transparent 80%),#08172e;border-bottom:1px solid #28466a}
.topics-hero::before,.catalog-hero::before{display:none}
.topics-hero .wrap,.catalog-hero-inner{padding-block:80px 72px}
.topics-hero h1,.catalog-hero h1{font-size:clamp(3.6rem,7.2vw,6rem);line-height:1.02;letter-spacing:-.035em;text-wrap:balance}
.topics-hero h1 span,.catalog-hero h1 span{color:#81c3ff}
.topics-hero h1+p,.catalog-hero h1+p{max-width:67ch;color:#cfdef0;font-size:clamp(1.12rem,1.7vw,1.32rem);line-height:1.6}
.topics-list,.catalog-list{padding-block:52px 84px;background:#091b37}
.topics-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.topic-card,.topic-card:nth-child(n),.course-card{background:#102744;border:1px solid #345376;border-radius:16px;box-shadow:none}
.topic-image{background:#173455}
.topic-image img{aspect-ratio:8/5;object-fit:cover}
.topic-copy{padding:26px;gap:0}
.topic-copy h2{font-size:1.65rem;line-height:1.2;overflow-wrap:anywhere}
.topic-copy p,.course-card p{color:#c3d5e9}
.topic-count{display:block;align-self:flex-start;color:#a9cbed;font-size:.9rem;margin-bottom:16px;font-variant-numeric:tabular-nums}
.topic-more{display:inline-flex;align-items:center;gap:12px;margin-top:auto;padding-block:10px 0;min-height:44px;color:#91caff}
.topic-more svg{width:18px;height:18px;flex:none}
.topic-copy h2 a:hover,.topic-more:hover,.course-card h3 a:hover{color:#fff}
.catalog-hero-inner{display:block}
.catalog-hero h1+p{max-width:64ch}
.catalog-hero .catalog-live-count{display:block;margin-top:28px;font-size:1rem;color:#b9cbe0}
.catalog-live-count strong{color:#f2f7ff;font-weight:500;font-variant-numeric:tabular-nums}
.catalog-list h2{font-size:clamp(2rem,3.3vw,3.1rem);max-width:24ch}
#course-search.catalog-controls{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,.5fr) auto;gap:18px;margin-top:30px;align-items:end}
#course-search>div{grid-column:auto;min-width:0}
#course-search label,.catalog-filter label{color:#b9cbe0;font-size:.9rem;letter-spacing:0;text-transform:none;margin-bottom:10px}
#course-query,#course-category{background:#102744;color:#f2f7ff;border-color:#45678c;border-radius:8px;height:54px;font-size:1rem;caret-color:#81c3ff}
#course-query::placeholder{color:#a7bdd6}
#course-query:focus,#course-category:focus{border-color:#81c3ff;outline:2px solid #81c3ff;outline-offset:2px}
#course-category{padding-right:26px}
#course-search button,#load-more{display:inline-flex;align-items:center;justify-content:center;min-height:54px;border:1px solid #4a8dd6;border-radius:8px;background:#075ebd;color:#fff;padding:12px 28px;font-size:1rem}
#course-search button:hover,#load-more:hover{background:#0871dc}
#load-more[aria-disabled=true]{opacity:.6;cursor:wait;pointer-events:none}
.catalog-status{color:#b9cbe0}
.course-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.course-cover,.course-cover img{min-height:0;background:#173455}
.course-cover img{aspect-ratio:16/9;object-fit:contain}
.course-card-body{min-height:270px;padding:24px}
.course-category{color:#9dcfff;font-size:.82rem;letter-spacing:.04em;overflow-wrap:anywhere}
.course-card h3{font-size:clamp(1.35rem,1.8vw,1.6rem);line-height:1.25;overflow-wrap:anywhere}
.course-author{color:#b9cbe0}
.catalog-empty{background:#102744;border-color:#345376;color:#d1e0f2}
.catalog-pagination{gap:24px;align-items:center;flex-wrap:wrap}
.catalog-previous{color:#91caff;text-decoration:underline;min-height:44px;display:inline-flex;align-items:center}
.catalog-editorial,.catalog-editorial-light{background:#08172e;border-top:1px solid #28466a}
.catalog-editorial-light{background:#0d213e}
.catalog-editorial .catalog-eyebrow{display:none}
.editorial-layout{grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:65px}
.editorial-layout h2{font-size:clamp(2.2rem,3.8vw,3.8rem);line-height:1.12}
.editorial-layout>div:last-child{color:#c3d5e9}
@media(max-width:1000px){.topics-grid,.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.editorial-layout{gap:36px}}
@media(max-width:700px){#course-search.catalog-controls{grid-template-columns:1fr}#course-search button{width:100%}.editorial-layout{grid-template-columns:1fr}.catalog-hero-inner,.topics-hero .wrap{padding-block:56px 48px}.topics-hero h1+p{font-size:1.1rem}.catalog-list,.topics-list{padding-block:36px 60px}}
@media(max-width:600px){.topics-grid,.course-grid{grid-template-columns:1fr;gap:20px}.course-card-body{min-height:0}.topic-copy{padding:24px}.topics-hero h1,.catalog-hero h1{font-size:clamp(3.2rem,12vw,4.8rem)}.catalog-pagination>a{width:100%}}