:root{--navy:#0b204f;--ink:#172b4d;--muted:#68758d;--line:#e2e7ef;--soft:#f6f8fb;--gold:#f5c543}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--soft);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,summary{-webkit-tap-highlight-color:transparent}button,summary{cursor:pointer}[hidden]{display:none!important}.container{width:min(1280px,calc(100% - 48px));margin:auto}.skip{position:absolute;top:-60px;padding:12px;background:white;z-index:100}.skip:focus{top:8px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #bd8c15;outline-offset:4px}.site-header{background:white;border-bottom:1px solid var(--line)}.header-row{display:grid;grid-template-columns:200px minmax(220px,1fr) auto;align-items:center;gap:30px;padding:20px 0}.brand{display:flex;align-items:center;gap:10px;width:max-content}.brand-mark{width:38px;height:38px;background:#eef2fa;border-radius:11px;padding:5px}.brand-mark svg{display:block;width:100%;height:100%}.brand-title{font-size:25px;font-weight:850;letter-spacing:-1px}.brand-title span{color:#d5a625}.brand-tag{display:block;font-size:10px;letter-spacing:.04em;color:var(--muted);margin-top:2px}.search{display:flex;gap:12px;align-items:center;padding:0 14px;min-height:46px;border:1px solid var(--line);background:var(--soft);border-radius:12px}.search:focus-within{border-color:#657fa9;box-shadow:0 0 0 3px #e4ebf7}.search input{min-width:0;width:100%;background:none;border:0;outline:0;color:var(--ink);font-size:14px}.search button{border:0;background:none;color:var(--navy);font-weight:700;min-height:44px}.header-links{display:flex;gap:22px;align-items:center;font-size:13px;font-weight:650;white-space:nowrap}.account{padding:12px 18px;background:var(--navy);color:white;border-radius:10px}.section{padding:32px 0 48px}.section-head{margin-bottom:26px}.section-head h2{margin:0 0 8px;font-size:clamp(23px,3vw,34px);line-height:1.2;letter-spacing:-1px;font-weight:780}.section-head p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}.catalog-layout{display:grid;grid-template-columns:218px minmax(0,1fr);gap:26px;align-items:start}.catalog-filters{background:white;border:1px solid var(--line);border-radius:14px;position:sticky;top:20px}.catalog-filters summary{list-style:none;padding:18px;font-weight:750;font-size:14px;display:flex;justify-content:space-between}.catalog-filters summary::-webkit-details-marker{display:none}.filter-panel{padding:0 18px 18px}.filter-group{margin-bottom:16px}.filter-group label{display:block;font-size:12px;font-weight:650;margin-bottom:8px}.field{width:100%;min-height:43px;background:white;border:1px solid var(--line);border-radius:9px;padding:0 10px;font-size:12px;color:var(--ink)}.field:focus{outline:2px solid #7f9ac4;outline-offset:1px}.filter-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.mini-btn{border:1px solid var(--line);border-radius:9px;min-height:42px;background:white;padding:0 12px;font-size:12px;font-weight:700;color:var(--navy)}.mini-btn.primary{color:white;background:var(--navy);border-color:var(--navy)}.catalog-top{display:flex;align-items:center;justify-content:space-between;min-height:32px;margin-bottom:12px;font-size:12px;color:var(--muted)}.catalog-top strong{font-weight:600}.products{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.product{background:white;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .15s}.product:hover{border-color:#9daecc}.home-cover{display:flex;flex-direction:column;gap:10px;justify-content:flex-end;height:205px;padding:20px;color:white;background:linear-gradient(135deg,#2563eb,#0e7490)}.home-cover.tone-1{background:linear-gradient(135deg,#15996a,#176249)}.home-cover.tone-2{background:linear-gradient(135deg,#254d9a,#0b1c46)}.home-cover strong{font-size:21px;line-height:1.3;overflow-wrap:anywhere}.home-cover span{font-size:11px}.home-cover-label{margin-bottom:auto;font-weight:700;opacity:.85}.product-body{padding:16px}.product-type{font-size:10px;font-weight:650;color:var(--muted);margin-bottom:8px}.product-name{font-size:15px;line-height:1.5;margin:0 0 10px;min-height:45px;overflow-wrap:anywhere}.product-meta{font-size:12px;color:var(--muted);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:38px;margin:0 0 18px}.product-foot{display:flex;align-items:center;justify-content:space-between;gap:8px}.price{font-size:14px;font-weight:750}.price.free{color:#12805f}.home-details{display:inline-flex;align-items:center;justify-content:center;background:var(--navy);color:white;border-radius:8px;min-height:42px;padding:0 11px;font-size:11px;font-weight:650}.home-empty{grid-column:1/-1;padding:60px 24px;border:1px dashed #cdd6e4;border-radius:14px;text-align:center}.home-empty strong{font-size:18px}.home-empty p{font-size:13px;line-height:1.7;color:var(--muted);max-width:420px;margin:12px auto}.home-pagination{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:24px;font-size:12px;color:var(--muted)}button:disabled{opacity:.4;cursor:default}.site-footer{border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.footer-row{padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px}.footer-row nav{display:flex;gap:20px}
@media(max-width:1000px){.header-row{grid-template-columns:auto 1fr auto;gap:20px}.brand-tag{display:none}.header-links{gap:14px}.seller-link{display:none}.catalog-layout{grid-template-columns:195px minmax(0,1fr);gap:18px}.products{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:780px){.container{width:calc(100% - 32px)}.header-row{grid-template-columns:1fr auto;gap:14px;padding:14px 0}.search{grid-column:1/-1;grid-row:2}.brand-title{font-size:23px}.account{padding:11px 15px;font-size:12px}.section{padding:24px 0 32px}.section-head{margin-bottom:20px}.section-head h2{font-size:25px;letter-spacing:-.7px}.section-head p{font-size:13px;max-width:320px}.catalog-layout{grid-template-columns:1fr;gap:16px}.catalog-filters{position:static}.catalog-filters summary{padding:13px 16px}.filter-panel{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:4px 16px 16px}.filter-group{margin:0}.filter-actions{grid-column:1/-1}.catalog-top{margin-bottom:8px;min-height:24px}.products{gap:12px}.home-cover{height:165px;padding:14px}.home-cover strong{font-size:16px}.home-cover span{font-size:10px}.product-body{padding:12px}.product-name{font-size:13px;min-height:40px}.product-type{font-size:9px}.product-meta{font-size:11px;margin-bottom:12px}.product-foot{flex-direction:column;align-items:stretch}.price{font-size:12px}.home-details{font-size:12px}.home-empty{padding:42px 18px}.footer-row{align-items:flex-start;flex-direction:column;gap:12px}.footer-row nav{gap:18px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.hero-wrap{position:relative;isolation:isolate;overflow:hidden;background:#091d48;color:white}.hero-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:75% 45%;z-index:-2}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,#081b47 0%,rgba(8,27,71,.94) 36%,rgba(8,27,71,.25) 83%);z-index:-1}.hero-content{padding-top:30px;padding-bottom:34px}.audience-tabs{display:inline-flex;gap:4px;padding:4px;background:#ffffff18;border:1px solid #ffffff33;border-radius:24px;margin-bottom:20px}.audience-tabs button{background:none;border:0;color:#fff;font-size:12px;font-weight:700;padding:8px 16px;border-radius:20px;min-height:34px}.audience-tabs button[aria-pressed=true]{background:white;color:var(--navy)}.hero-content h1{font-size:clamp(27px,3.1vw,42px);line-height:1.15;letter-spacing:-1px;margin:0 0 14px;max-width:640px}.hero-content h1 span{display:block;color:#ffd65b}.hero-content p{font-size:14px;line-height:1.7;max-width:460px;margin:0 0 22px;color:#e0e7f6}.hero-primary{display:inline-flex;align-items:center;justify-content:center;padding:12px 19px;min-height:44px;background:#ed4c43;color:white;border-radius:9px;font-size:13px;font-weight:750}.site-footer{background:#0b204f;color:#d8e1f2;padding:30px 0 18px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}.footer-brand{font-size:23px;font-weight:800;color:white}.footer-brand span{color:var(--gold)}.footer-grid p{font-size:12px;line-height:1.7;max-width:260px}.footer-grid nav{display:flex;flex-direction:column;align-items:flex-start;gap:12px;font-size:12px}.footer-grid nav strong{color:white;margin-bottom:2px}.footer-grid a:hover{text-decoration:underline}.footer-bottom{border-top:1px solid #ffffff20;margin-top:26px;padding-top:16px;font-size:11px}.arif-guide{position:fixed;right:18px;bottom:18px;z-index:30;max-width:calc(100vw - 32px)}#arif-button{display:flex;align-items:center;gap:0;border:0;background:transparent;color:var(--navy);padding:0}#arif-button img{width:70px;height:78px;object-fit:contain}#arif-button span{background:white;border:1px solid var(--line);padding:11px 14px;border-radius:12px;font-size:12px;font-weight:700;box-shadow:0 4px 15px #0b204f12}#arif-panel{background:white;border:1px solid var(--line);border-radius:15px;box-shadow:0 12px 45px #0b204f26;width:305px;padding:18px;margin-bottom:10px;color:var(--ink)}.arif-heading{display:flex;justify-content:space-between;align-items:center}.arif-heading button{border:0;background:var(--soft);border-radius:8px;font-size:24px;min-width:36px;min-height:36px;color:var(--navy)}#arif-panel p{font-size:13px;color:var(--muted)}#arif-panel a{display:block;padding:12px 0;border-bottom:1px solid var(--line);font-size:13px;font-weight:600}#arif-panel small{display:block;font-size:11px;line-height:1.6;color:var(--muted);margin-top:14px}.teacher-intro{padding:36px 0}.teacher-card{padding:26px;border:1px solid var(--line);background:white;border-radius:16px;max-width:800px}.teacher-card h1{font-size:28px;margin:8px 0 12px;letter-spacing:-.6px}.teacher-card p{font-size:14px;line-height:1.8;color:var(--muted);max-width:650px}.teacher-eyebrow{font-size:11px;font-weight:750;letter-spacing:.08em;color:#526991}.teacher-steps{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin:20px 0}.teacher-card .hero-primary{background:var(--navy)}
@media(max-width:780px){.header-links{gap:10px}.seller-link{display:block;font-size:11px}.hero-content{padding-top:24px;padding-bottom:28px}.hero-content h1{font-size:28px;max-width:370px}.hero-content p{font-size:13px;max-width:320px}.hero-shade{background:linear-gradient(90deg,rgba(8,27,71,.97),rgba(8,27,71,.75) 65%,rgba(8,27,71,.4))}.hero-image{object-position:68% center}.footer-grid{grid-template-columns:1fr 1fr;gap:24px}.footer-grid>div{grid-column:1/-1}.footer-bottom{padding-bottom:60px}.arif-guide{right:10px;bottom:10px}#arif-button img{width:53px;height:62px}#arif-button span{padding:9px 11px;font-size:11px}.teacher-intro{padding:24px 0}.teacher-card{padding:22px}.teacher-card h1{font-size:25px}}
/* Keep pagination controls clear of the persistent assistant. */
.home-pagination{padding-right:145px;justify-content:flex-start;flex-wrap:wrap;row-gap:10px}
@media(max-width:480px){.header-row{column-gap:10px;grid-template-columns:minmax(0,1fr) auto}.brand{gap:7px}.brand-mark{width:32px;height:32px}.brand-title{font-size:21px}.header-links{gap:9px}.seller-link{font-size:10px}.account{font-size:11px;padding:10px 12px}}

/* Reference header: two links, audience switch, cart and account icons. */
.header-row{grid-template-columns:170px minmax(180px,1fr) auto;gap:22px;padding:20px 0}.brand-tag{max-width:160px;font-size:9px;letter-spacing:.03em;line-height:1.4}.store-nav,.nav-links,.header-icons{display:flex;align-items:center}.store-nav{gap:16px;white-space:nowrap}.nav-links{gap:18px;font-size:12px;font-weight:700}.home-link{color:#224bc2}.header-icons{gap:9px}.header-icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;border:1px solid #dbe3ef;background:white;color:var(--navy);flex-shrink:0}.header-icon svg{width:21px;height:21px}.header-icon:hover{background:#edf2fa}.account-icon{background:var(--navy);color:white;border-color:var(--navy)}.account-icon:hover{background:#153773}.audience-tabs{margin:0;background:#f2f5fb;border-color:#dce5f5;padding:4px;gap:3px}.audience-tabs button{font-size:12px;min-height:34px;padding:8px 12px;color:#52627e}.audience-tabs button[aria-pressed=true]{background:#102c65;color:white}.hero-content{padding-top:42px;padding-bottom:42px}.hero-content h1{font-size:clamp(34px,4.2vw,56px);max-width:770px;line-height:1.12;letter-spacing:-1.8px;margin-bottom:23px}.hero-content #heroDescription{font-size:15px;line-height:1.85;max-width:620px;margin-bottom:28px}.hero-content .hero-eyebrow{font-size:11px;letter-spacing:.1em;font-weight:800;color:#ffca96;max-width:none;margin:0 0 22px;line-height:1.6}.hero-eyebrow:before{content:'';display:inline-block;width:22px;height:1px;background:#c2a38f;vertical-align:middle;margin-right:12px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.hero-primary,.hero-secondary{min-height:46px;padding:14px 20px;font-size:13px;font-weight:750}.hero-secondary{display:inline-flex;align-items:center;justify-content:center;background:#ffffff12;border:1px solid #ffffff66;color:white;border-radius:9px}#cartDialog{width:min(430px,calc(100vw - 32px));padding:24px;border:1px solid var(--line);border-radius:18px;color:var(--ink);box-shadow:0 20px 80px #06163433}#cartDialog::backdrop{background:#081b4770}.cart-dialog-head{display:flex;align-items:center;justify-content:space-between;gap:15px}.cart-dialog-head h2{margin:0;font-size:23px}.cart-dialog-head button{font-size:26px}.cart-note{font-size:13px;color:var(--muted);line-height:1.8;margin-bottom:24px}
@media(max-width:1140px){.header-row{grid-template-columns:auto 1fr;column-gap:20px;row-gap:14px}.store-nav{justify-self:end;grid-column:2;grid-row:1}.search{grid-column:1/-1;grid-row:2}.nav-links{gap:15px}.brand-tag{display:none}}
@media(max-width:780px){.header-row{grid-template-columns:minmax(0,1fr) auto;gap:13px;padding:14px 0}.store-nav{display:contents}.brand{grid-column:1;grid-row:1}.header-icons{grid-column:2;grid-row:1;justify-self:end}.nav-links{grid-column:1/-1;grid-row:2;justify-content:space-between;gap:8px;font-size:12px}.search{grid-row:3;grid-column:1/-1;min-height:43px}.header-icon{width:41px;height:41px}.audience-tabs button{padding:7px 11px;font-size:11px;min-height:32px}.hero-content{padding-top:28px;padding-bottom:30px}.hero-content h1{font-size:34px;max-width:560px;letter-spacing:-1px;line-height:1.13}.hero-content #heroDescription{font-size:13px;max-width:430px;line-height:1.8;margin-bottom:23px}.hero-content .hero-eyebrow{font-size:9px;letter-spacing:.045em;max-width:340px;margin-bottom:18px}.hero-eyebrow:before{width:15px;margin-right:8px}.hero-primary,.hero-secondary{font-size:12px;padding:12px 16px;min-height:44px}}
@media(max-width:400px){.nav-links{font-size:11px;gap:5px}.audience-tabs{padding:3px}.audience-tabs button{font-size:10px;padding:7px 9px}.hero-content h1{font-size:32px}.hero-content .hero-eyebrow{font-size:8px}}

.kind-chips{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:16px}.kind-chips button{border:1px solid #dce4f0;background:white;color:#51627e;border-radius:24px;padding:11px 16px;min-height:44px;font-size:12px;font-weight:750;white-space:nowrap}.kind-chips button[aria-pressed=true]{background:var(--navy);color:white;border-color:var(--navy)}.kind-chips button:hover{border-color:#6f87ac}.kind-caption{font-size:12px;color:var(--muted);margin:0 0 10px}.catalog-layout>div{min-width:0}@media(max-width:780px){.kind-chips{flex-wrap:nowrap;overflow-x:auto;padding-bottom:6px;max-width:100%;scrollbar-width:thin}.kind-chips button{font-size:11px;padding:10px 14px;flex-shrink:0}}
.home-cover{position:relative}.home-presentation{position:absolute;inset:0;background:#f2f5f9}.home-presentation img{width:100%;height:100%;object-fit:contain}.home-cover:has(.home-presentation img)>:not(.home-presentation){visibility:hidden}.home-presentation[hidden]{display:none}