@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--navy:#202f42;--ink:#25334a;--muted:#748092;--line:#e6e8e9;--paper:#f7f8fa;--accent:#2f7e78;font-family:'DM Sans',sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}a,button,input{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #cf963f;outline-offset:3px}.skip{position:fixed;top:-100px;left:20px;z-index:30;background:white;padding:14px;border-radius:8px}.skip:focus{top:12px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}#sidebar{position:fixed;inset:0 auto 0 0;width:272px;background:var(--navy);color:#d7deea;padding:30px 22px 22px;z-index:20;overflow:auto;scrollbar-width:thin;scrollbar-color:#506079 var(--navy)}.brand{display:flex;align-items:center;gap:13px;padding:0 4px}.brand strong{display:block;font-family:Manrope,sans-serif;font-size:17px;color:#fff;font-weight:800;letter-spacing:-.4px}.brand small{display:block;font-size:8px;letter-spacing:2.2px;color:#9aaac0;margin-top:7px}.monogram{font-family:Manrope,sans-serif;position:relative;background:#34465d;color:#f2d29e;display:grid;place-items:center;width:46px;height:48px;border-radius:12px;font-size:19px;letter-spacing:-1px}.monogram span{position:absolute;font-size:12px;right:-3px;top:-5px}.side-line{height:1px;background:#3b485c;margin:29px 0 21px}.nav-home{display:flex;gap:12px;align-items:center;padding:12px 14px;font-size:12px;border-radius:8px}.nav-home>span{font-size:20px}.nav-home.active{background:#35465e;color:white}.nav-label{font-size:8px;letter-spacing:1.6px;color:#8d9db3;font-weight:700;margin:29px 13px 14px}.subject{margin:5px 0}.subject summary{list-style:none;display:flex;align-items:center;gap:11px;font-size:12px;border-radius:8px;padding:12px 11px;cursor:pointer;user-select:none}.subject 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10px;border-radius:7px;background:white;color:var(--ink)}main{outline:none}#content{max-width:1500px;margin:auto;padding:35px 44px 60px}h1,h2,h3{font-family:Manrope,sans-serif}.hero{background:#e9edf6;border:1px solid #e0e5f0;border-radius:17px;padding:38px 40px;position:relative;overflow:hidden;min-height:300px}.hero-content{position:relative;z-index:1;max-width:610px}.eyebrow{display:flex;align-items:center;gap:8px;font-size:9px;letter-spacing:1.5px;text-transform:uppercase;font-weight:700;color:#6f7d9a}.eyebrow:before{content:'';width:5px;height:5px;background:#729d93;border-radius:50%}h1{font-size:clamp(30px,3vw,43px);font-weight:800;letter-spacing:-1.5px;line-height:1.2;margin:19px 0 16px}.hero p{font-size:13px;line-height:1.85;color:#6d7891;max-width:440px;margin:0}.hero-actions{display:flex;gap:16px;align-items:center;margin-top:25px}.primary{background:#283c57;color:white;display:inline-flex;gap:15px;align-items:center;padding:12px 17px;border-radius:7px;font-size:10px;font-weight:700}.hero-actions .quiet-link{font-size:10px;color:#6b7991}.hero-art{position:absolute;right:25px;bottom:8px;width:300px;height:280px;color:#5d759c;opacity:.9}.hero-art svg{width:100%;height:100%}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:31px 0 18px}.section-head h2{font-size:20px;letter-spacing:-.6px;margin:0}.section-head p{font-size:11px;color:var(--muted);margin:0}.subject-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.subject-card{border:1px solid var(--line);background:#fff;padding:20px 18px;border-radius:11px;position:relative;transition:transform .15s,box-shadow .15s}.subject-card:hover,.resource:hover{transform:translateY(-2px);box-shadow:0 7px 20px #25334a08;border-color:#c9d0dd}.subject-card .big-icon{display:grid;place-items:center;width:38px;height:38px;font-size:23px;background:var(--tint);color:var(--color);border-radius:10px;margin-bottom:15px}.subject-card h3{font-size:12px;line-height:1.4;margin:0 0 7px;letter-spacing:-.2px}.subject-card p{font-size:10px;color:#8c96a5;margin:0}.subject-card .arrow{position:absolute;right:17px;top:29px;color:#9da8b8;font-size:15px}.resources{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.resource{display:flex;flex-direction:column;min-height:188px;border:1px solid var(--line);background:#fff;border-radius:11px;padding:21px;transition:transform .15s,box-shadow .15s}.resource-top{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:17px}.resource-symbol{font-size:22px;color:var(--color);line-height:1}.tag{font-size:8px;border-radius:4px;background:var(--tint);color:var(--color);padding:4px 7px;line-height:1.5}.resource h3{font-size:14px;line-height:1.5;letter-spacing:-.3px;margin:0 0 9px}.resource p{font-size:11px;line-height:1.7;color:var(--muted);margin:0 0 18px}.resource-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:auto;font-size:9px;color:#8c97a7}.resource-bottom .go{font-size:15px;color:#5a6e8b}.home-note{display:flex;gap:16px;align-items:center;background:#eef3f0;border:1px solid #e0e9e3;border-radius:10px;padding:19px 23px;margin-top:28px}.home-note>span{color:#688b78;font-size:24px}.home-note p{font-size:11px;line-height:1.7;color:#6c8074;margin:0}.home-note strong{display:block;color:#3f6352;font-weight:600}.section-title{display:flex;justify-content:space-between;align-items:start;gap:20px;margin:5px 0 25px}.section-title h1{font-size:32px;letter-spacing:-1px;margin:12px 0}.section-title p{font-size:12px;color:var(--muted);line-height:1.8;max-width:650px;margin:0}.large-icon{display:grid;place-items:center;border-radius:15px;width:65px;height:65px;font-size:34px;color:var(--color);background:var(--tint);flex-shrink:0}.list-toolbar{display:flex;justify-content:space-between;align-items:center;margin:24px 0 18px;font-size:11px;color:var(--muted)}.list-toolbar select{font:inherit;color:var(--muted);padding:8px;border:1px solid var(--line);border-radius:6px;background:white}.empty{padding:45px 25px;background:white;border:1px solid var(--line);border-radius:12px;grid-column:1/-1;line-height:1.9;font-size:13px;color:var(--muted)}.info-panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:27px 30px;margin:20px 0;max-width:900px}.info-panel h2{font-size:18px;margin:0 0 14px}.info-panel p,.info-panel li{font-size:13px;color:#6c7a8d;line-height:1.9}.info-panel a{color:#3e719c;text-decoration:underline;text-underline-offset:3px}.info-panel li{margin:8px 0}.info-panel ul{padding-left:20px}.back-link{display:inline-block;color:#627890;font-size:11px;margin-bottom:16px}.viewer-toolbar{display:flex;gap:9px;flex-wrap:wrap;margin:20px 0}.tool{background:white;border:1px solid var(--line);border-radius:7px;padding:10px 13px;font-size:11px}.viewer{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}.viewer-status{padding:9px 14px;font-size:9px;color:#748398;background:#edf1f7}iframe{display:block;width:100%;height:75dvh;min-height:580px;border:0;background:#fff}.frame-note{font-size:10px;line-height:1.8;color:var(--muted)}.focus #sidebar{display:none}.focus .shell{margin-left:0}.focus #menu-toggle{display:block}.focus #content{max-width:none}.focus iframe{height:85dvh}footer{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding:20px 44px;font-size:9px;color:#94a0af}.loading{text-align:center;padding:70px;color:var(--muted)}[hidden]{display:none!important}
@media(min-width:1550px){.resources{grid-template-columns:repeat(4,minmax(0,1fr))}}@media(max-width:1200px){header{padding:0 28px}#content{padding:28px}.hero-art{width:230px;right:0;opacity:.5}.hero-content{max-width:520px}.subject-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.resources{grid-template-columns:repeat(2,minmax(0,1fr))}.header-title{font-size:8px}.search{width:290px}.hero{padding:32px}.hero p{max-width:360px}}
@media(max-width:900px){.header-title{display:none}.search{width:100%}.hero-art{opacity:.22;right:-50px}.hero-content{max-width:100%}.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-actions{gap:12px}}
@media(max-width:720px){#sidebar{transform:translateX(-100%);transition:transform .18s}.menu-open #sidebar{transform:translateX(0)}#backdrop{position:fixed;inset:0;z-index:19;background:#15243899;border:0}.shell{margin-left:0}#menu-toggle{display:block}header{padding:0 17px;height:70px;gap:13px}.search{padding:10px}.search kbd{display:none}.search input{font-size:11px}#content{padding:22px 18px 40px}.hero{padding:27px 25px;min-height:290px}.hero-art{bottom:-15px;right:-65px}.hero h1{font-size:33px;max-width:300px}.hero p{font-size:12px;max-width:310px}.hero-actions{flex-wrap:wrap}.hero-actions .quiet-link{font-size:9px}.primary{font-size:10px}.section-head{gap:12px;align-items:start}.section-head h2{font-size:18px}.section-head p{font-size:10px;line-height:1.7;text-align:right;max-width:125px}.subject-card{padding:18px}.resources{gap:11px}.resource{padding:17px;min-height:205px}.resource h3{font-size:13px}.resource p{font-size:10px}.resource-top{margin-bottom:14px}.tag{font-size:7px}.resource-bottom{font-size:8px}.home-note{padding:17px;align-items:start}.home-note p{font-size:10px}.section-title h1{font-size:28px}.large-icon{width:48px;height:48px;font-size:25px}.info-panel{padding:23px}.info-panel p,.info-panel li{font-size:12px}footer{padding:20px 18px;font-size:8px}footer>span:last-child{display:none}.focus #sidebar{display:block}}
@media(max-width:390px){.resources{grid-template-columns:1fr}.resource{min-height:160px}.hero h1{font-size:29px}}
.library-filters{display:flex;gap:7px;flex-wrap:wrap;margin:22px 0 12px}.library-filter{border:1px solid #dce2ea;border-radius:18px;background:white;color:#66788c;padding:9px 13px;font-size:11px}.library-filter.selected{background:#283c57;color:white;border-color:#283c57}.library-heading{font-size:20px;letter-spacing:-.5px;margin:30px 0 17px}.library-intro{font-size:12px;line-height:1.8;color:#6c7a8d;max-width:850px;margin:-5px 0 20px}.book-code{font-family:monospace;font-size:13px;font-weight:700;color:#526879;letter-spacing:.3px;margin:0 0 13px;background:#f2f5f8;border-radius:5px;padding:7px 10px;width:fit-content}.book-card h3 a:hover{text-decoration:underline;text-underline-offset:3px}.book-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:auto;font-size:10px}.book-open{font-weight:700;color:#496d90}.book-actions a:hover{text-decoration:underline}.book-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.video-card{padding:0;overflow:hidden;display:block;min-height:0}.video-media{width:100%;aspect-ratio:16/9;background:#162337}.video-poster{display:block;position:relative;width:100%;height:100%;border:0;background:#172c43;padding:0;text-align:left;color:white}.video-poster img{display:block;width:100%;height:100%;object-fit:cover}.video-poster:after{content:'';position:absolute;inset:0;background:linear-gradient(transparent 50%,#071a2a55)}.episode-badge{position:absolute;top:11px;left:11px;background:#15283ed9;color:#fff;border-radius:5px;padding:5px 8px;font-size:10px;z-index:1}.play-symbol{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);display:grid;place-items:center;border-radius:50%;width:49px;height:49px;background:#ffffffec;color:#263d58;font-size:18px;z-index:1;box-shadow:0 2px 15px #0003}.video-poster:hover .play-symbol{background:#e7c992}.video-caption{padding:18px 19px 21px}.video-series{font-size:9px;color:#8b96a7}.video-caption h3{margin:8px 0 13px;font-size:15px;line-height:1.55}.video-source{font-size:10px;color:#607b9b;text-decoration:underline;text-underline-offset:3px}.video-media .youtube-frame,.standalone-video .youtube-frame{height:100%;min-height:0;width:100%;border:0}.official-poster{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#17364c,#405c76)}.official-wordmark{font-family:Manrope,sans-serif;font-size:25px;font-weight:800;text-align:center}.official-wordmark span{display:block;font-size:10px;margin-top:10px;font-weight:400}.availability{font-size:11px!important;color:#7f6c4d!important;line-height:1.7}.standalone-video{max-width:1100px;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:#142335}.video-detail-caption{padding-top:25px}.video-detail-caption h1{font-size:30px}.video-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
@media(max-width:1150px){.video-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:720px){.book-grid{grid-template-columns:1fr}.video-grid{grid-template-columns:1fr}.video-caption h3{font-size:17px}.library-heading{font-size:19px}.library-filter{font-size:10px;padding:9px 11px}.video-detail-caption h1{font-size:26px}.book-code{font-size:13px}.book-actions{font-size:11px}.video-source{font-size:11px}}
.book-summary{display:flex;gap:17px;align-items:flex-start;margin-bottom:17px}.book-cover-link{flex:0 0 84px;display:block;border-radius:3px;overflow:hidden;box-shadow:0 3px 9px #172d4320;background:#f0f3f7}.book-cover{display:block;width:84px;height:118px;object-fit:contain;background:#f0f3f7}.book-main{min-width:0;flex:1}.book-labels{display:flex;flex-direction:column;gap:5px;margin-bottom:12px}.book-kind{font-family:Manrope,sans-serif;font-size:18px;font-weight:800;color:var(--color);line-height:1.3}.book-grade{font-size:16px;font-weight:700;color:#324861;line-height:1.4}.book-main h3{font-size:13px;line-height:1.6;margin-bottom:10px}.book-main .book-code{font-size:11px;padding:6px 7px;letter-spacing:0;max-width:100%;overflow-wrap:anywhere;margin-bottom:0}.book-card{min-height:240px}.book-card>p{margin-bottom:18px}.book-actions{padding-top:6px}
@media(max-width:720px){.book-kind{font-size:20px}.book-grade{font-size:17px}.book-main h3{font-size:14px}.book-main .book-code{font-size:12px}.book-summary{gap:18px}}
.book-actions{flex-wrap:wrap;row-gap:13px}.nkp-open{flex-basis:100%;text-align:center;font-weight:700;font-size:12px;color:#27685f;background:#eaf4ef;border:1px solid #d4e6dc;border-radius:6px;padding:11px 12px}.nkp-open:hover{background:#dceee4;text-decoration:none!important}.nkp-note{flex-basis:100%;font-size:10px;color:#7c8797;line-height:1.6}
.library-group{border:1px solid #dce3eb;border-radius:12px;background:#fff;margin:15px 0;overflow:hidden}.library-group>summary{list-style:none;display:flex;align-items:center;gap:13px;padding:21px 23px;font-family:Manrope,sans-serif;font-size:16px;font-weight:800;cursor:pointer;line-height:1.5}.library-group>summary::-webkit-details-marker,.grade-group>summary::-webkit-details-marker,.episode-range>summary::-webkit-details-marker{display:none}.library-group[open]>summary{background:#edf2f7;border-bottom:1px solid #dfe6ee}.group-count{margin-left:auto;font:600 11px 'DM Sans',sans-serif;padding:4px 8px;border-radius:6px;color:#6e8298;background:#e9eef5}.fold-chevron{margin-left:auto;transition:transform .15s;color:#7d90a6;flex:0 0 auto}.group-count+.fold-chevron{margin-left:0}.library-group[open]>summary>.fold-chevron,.grade-group[open]>summary>.fold-chevron,.episode-range[open]>summary>.fold-chevron{transform:rotate(180deg)}.group-content{padding:18px 21px 22px}.grade-group,.episode-range{margin:10px 0;border:1px solid #e0e6ed;border-radius:8px;overflow:hidden}.grade-group>summary,.episode-range>summary{list-style:none;display:flex;align-items:center;gap:16px;padding:16px 18px;cursor:pointer;font-weight:700;font-size:15px;background:#f7f9fb}.grade-group>summary>span:not(.fold-chevron),.episode-range>summary>span:not(.fold-chevron){font-size:11px;font-weight:400;color:#8390a1}.grade-group .book-pair,.episode-range .video-grid{padding:16px}.book-pair{grid-template-columns:repeat(2,minmax(0,1fr))!important;align-items:stretch}.group-content>.library-intro{margin:0 0 18px}.atlas-group .book-grid{grid-template-columns:minmax(0,1fr)}.nav-subgroup,.nav-range{margin:8px 0}.subject .nav-subgroup>summary,.subject .nav-range>summary{font-size:11px;padding:9px 6px;gap:7px;color:#d3dfed;line-height:1.6}.nav-subgroup>summary>span{margin-left:auto;color:#8da5be;font-size:9px}.subject .nav-subgroup>summary:before,.subject .nav-range>summary:before{content:'›';font-size:15px}.subject .nav-subgroup[open]>summary:before,.subject .nav-range[open]>summary:before{transform:rotate(90deg)}.nav-subgroup>a,.nav-range>a{margin-left:7px}.nav-range{margin-left:10px}
@media(max-width:720px){.library-group>summary{padding:18px 15px;font-size:14px;gap:9px}.group-content{padding:10px}.grade-group>summary,.episode-range>summary{padding:14px 11px;font-size:14px;flex-wrap:wrap;gap:6px}.episode-range>summary>span:not(.fold-chevron){flex-basis:80%;font-size:10px}.grade-group>summary>span:not(.fold-chevron){font-size:10px}.book-pair{gap:9px}.grade-group .book-pair,.episode-range .video-grid{padding:9px}.book-pair .book-card{padding:12px;min-width:0}.book-pair .book-summary{flex-direction:column;gap:12px}.book-pair .book-cover,.book-pair .book-cover-link{width:64px;height:90px;flex-basis:auto}.book-pair .book-main{width:100%}.book-pair .book-kind{font-size:17px;overflow-wrap:anywhere}.book-pair .book-grade{font-size:15px}.book-pair .book-main h3{font-size:12px}.book-pair .book-code{font-size:10px;padding:5px}.book-pair .book-actions{font-size:10px;gap:12px}.book-pair .nkp-open{font-size:10px;padding:9px 6px}.book-pair .book-card>p{font-size:10px}.book-pair .book-actions>a{overflow-wrap:anywhere}.library-group .group-count{font-size:10px}}
.nav-code{display:block;font-size:9px;letter-spacing:.1px;color:#8da4c0;margin-top:4px}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}