@charset "UTF-8";
:root{--cream:#faf7f0;--paper:#fffdfa;--ink:#183541;--muted:#526568;--teal:#226e68;--teal-dark:#175e5b;--pale-teal:#e5efeb;--gold:#c69b55;--pale-gold:#f3e8d2;--line:#dfded4;--serif:Georgia,'Times New Roman',serif;--sans:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--shadow:0 18px 45px rgba(24,53,65,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--cream);color:var(--ink);font:15px/1.6 var(--sans);-webkit-font-smoothing:antialiased}button,input{font:inherit}a{color:inherit;text-decoration:none}button,a,input{touch-action:manipulation}button{cursor:pointer}img{max-width:100%;display:block}svg{display:block}button{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,iframe:focus-visible{outline:3px solid var(--gold);outline-offset:5px}::selection{background:var(--pale-gold)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-80px;left:20px;background:var(--ink);color:white;padding:12px 20px;z-index:100}.skip-link:focus{top:12px}.site-topline{min-height:35px;display:flex;justify-content:space-between;gap:20px;padding:8px max(5vw,24px);background:var(--ink);color:#eaf0e9;font-size:10px;letter-spacing:1.5px;text-transform:uppercase}.site-header{background:var(--cream);position:relative;z-index:20}.header-inner{max-width:1320px;margin:auto;min-height:105px;padding:22px 44px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:13px}.brand-mark{width:40px;height:40px}.brand-mark svg{width:100%;fill:none;stroke:var(--ink);stroke-width:1.6}.brand-mark .mark-gold{stroke:var(--gold);stroke-width:2.2}.brand-title{display:block;font-family:var(--serif);font-size:26px;line-height:1.25;letter-spacing:-.8px}.brand-caption{display:block;font-size:8.5px;text-transform:uppercase;letter-spacing:2.3px;margin-top:4px;color:var(--muted)}.primary-navigation{display:flex;align-items:center;gap:29px;font-size:12px;font-weight:600}.primary-navigation a{padding:9px 0;border-bottom:1px solid transparent}.primary-navigation a:hover,.primary-navigation a[aria-current=page]{border-color:var(--gold)}.primary-navigation a span{color:var(--teal);margin-left:5px}.menu-toggle{display:none}.educator-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.educator-inner{max-width:1232px;margin:auto;display:flex;align-items:center;gap:29px;min-height:48px;padding:0 0}.educator-label{font-size:9px;letter-spacing:1.7px;text-transform:uppercase;color:var(--muted);margin-right:12px}.educator-link{display:flex;gap:10px;align-items:center;font-size:11px;min-height:48px;position:relative;color:var(--muted)}.educator-link.active{color:var(--ink);font-weight:600}.educator-link.active:after{position:absolute;content:'';height:2px;left:0;right:0;bottom:-1px;background:var(--teal)}.educator-dot{width:5px;height:5px;background:var(--teal);border-radius:50%}.coming-small{font-size:8px;line-height:1.5;background:#eeeae1;border-radius:3px;padding:3px 6px;letter-spacing:.4px}.container{max-width:1232px;margin:auto}.eyebrow{display:block;font-size:10px;line-height:1.5;font-weight:600;text-transform:uppercase;letter-spacing:2px;color:var(--teal)}h1,h2,h3,h4,p{margin:0}h1,h2,h3,h4{font-weight:400}h1,h2,h3{font-family:var(--serif)}.hero{overflow:hidden;position:relative}.hero-inner{max-width:1320px;min-height:614px;margin:auto;padding:67px 44px 60px;display:grid;grid-template-columns:1fr 1.03fr;align-items:center;gap:24px}.hero-copy{position:relative;z-index:2;padding:0 0 28px}.hero h1{max-width:590px;font-size:clamp(38px,4.2vw,62px);line-height:1.07;letter-spacing:-2px;margin:19px 0 24px}.hero h1 em{font-weight:400;color:var(--teal)}.hero-description{max-width:435px;color:var(--muted);font-size:14px;line-height:1.85}.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:31px}.button{display:inline-flex;align-items:center;justify-content:center;gap:16px;min-height:47px;padding:13px 22px;border:1px solid transparent;font-size:11px;font-weight:600;line-height:1.5;border-radius:2px;transition:background .2s,transform .2s}.button:hover{transform:translateY(-2px)}.button-primary{background:var(--teal-dark);color:white}.button-primary:hover{background:var(--ink)}.button-outline{border-color:#cdd4ce;background:transparent}.button-outline:hover{background:var(--pale-teal)}.button-light{background:var(--paper);color:var(--ink)}.button-small{padding:9px 14px;min-height:37px;font-size:10px}.text-link{font-size:11px;font-weight:600;border-bottom:1px solid var(--gold);padding-bottom:4px;display:inline-flex;gap:16px;align-items:center}.text-link:hover{color:var(--teal)}.hero-note{margin-top:25px;display:flex;align-items:center;gap:9px;color:var(--muted);font-size:10px}.hero-note svg{width:14px;height:14px;fill:none;stroke:var(--teal);stroke-width:1.5}.hero-art{position:relative;min-height:475px;margin-right:-20px}.hero-orbit{position:absolute;inset:17px 4% 0 1%;border:1px solid #e0ded2;border-radius:50%;transform:rotate(-13deg);background:radial-gradient(ellipse,#efece16b 0%,transparent 70%)}.hero-orbit:after{content:'';position:absolute;inset:29px;border:1px solid #e7e3d7;border-radius:50%}.hero-math{position:absolute;inset:0;width:100%;height:100%;overflow:visible}.paper-preview{position:absolute;width:235px;aspect-ratio:8.5/11;background:var(--paper);box-shadow:0 15px 25px #1835411c,0 1px 5px #1835411c;border:1px solid #e1ded4;overflow:hidden;transition:transform .3s}.paper-preview img{width:100%;height:100%;object-fit:cover;object-position:top;position:relative;z-index:1}.paper-preview:hover{transform:translateY(-7px) rotate(0)}.paper-worksheet{left:17%;top:66px;transform:rotate(-9deg);z-index:3}.paper-quiz{left:46%;top:30px;transform:rotate(7deg);z-index:2;width:220px}.paper-assessment{left:54%;top:146px;transform:rotate(14deg);z-index:1;width:202px}.paper-fallback{position:absolute;inset:0;padding:19px 15px}.paper-fallback>span{display:block;color:var(--teal);font-size:7px;text-transform:uppercase;letter-spacing:1.3px}.paper-fallback h3{font-size:18px;line-height:1.2;margin:12px 0}.paper-fallback .fallback-lines{height:170px;background:repeating-linear-gradient(to bottom,transparent 0,transparent 27px,#d7ddd4 28px,#d7ddd4 29px);margin-top:20px}.hero-art-label{position:absolute;left:13%;bottom:0;background:var(--pale-gold);padding:11px 16px;font-size:10px;letter-spacing:.5px;z-index:4;transform:rotate(-3deg);box-shadow:0 3px 9px #1835410a}.hero-art-label span{font-family:var(--serif);font-style:italic;font-size:15px;margin-right:9px}.stats-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.stats-inner{max-width:1232px;margin:auto;display:grid;grid-template-columns:repeat(3,1fr)}.stat{display:flex;align-items:center;gap:19px;padding:23px 38px;border-right:1px solid var(--line)}.stat:first-child{padding-left:0}.stat:last-child{border-right:0}.stat-number{font-family:var(--serif);font-size:38px;line-height:1;color:var(--teal)}.stat-title{font-size:11px;font-weight:600}.stat-description{font-size:10px;color:var(--muted);margin-top:2px}.editorial-intro{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;align-items:start;padding:73px 0 67px}.editorial-intro h2{font-size:36px;line-height:1.2;letter-spacing:-.7px;margin-top:12px}.intro-detail{display:grid;grid-template-columns:1fr 1fr;gap:29px;padding-top:8px}.intro-detail article{position:relative;padding-top:11px}.intro-rule{width:27px;height:2px;background:var(--gold);margin-bottom:16px}.intro-detail h3{font-size:19px;margin-bottom:8px}.intro-detail p{font-size:12px;line-height:1.8;color:var(--muted)}.library-section{padding:64px 0 75px;background:#f0f2eb;border-top:1px solid #e1e5dc;position:relative}.section-heading{display:flex;justify-content:space-between;gap:30px;align-items:flex-end;margin-bottom:29px}.section-heading h2{font-size:42px;line-height:1.13;letter-spacing:-1px;margin-top:10px}.section-heading p{max-width:440px;color:var(--muted);font-size:12px;line-height:1.8}.library-search-row{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:20px}.search-wrap{position:relative;flex:1;max-width:610px}.search-wrap svg{width:18px;height:18px;position:absolute;top:18px;left:17px;fill:none;stroke:var(--muted);stroke-width:1.5}.search-input{width:100%;min-height:54px;border:1px solid #d2dace;background:var(--paper);padding:15px 45px;font-size:12px;color:var(--ink);border-radius:2px}.search-input::placeholder{color:#788882}.search-clear{position:absolute;right:12px;top:12px;width:30px;height:30px;border:0;background:transparent;font-size:22px;color:var(--muted)}.search-clear[hidden]{display:none}.library-count{font-size:10px;color:var(--muted);letter-spacing:.3px}.filter-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:33px}.filter-button{background:transparent;border:1px solid #d2d9cf;padding:9px 15px;min-height:37px;border-radius:2px;font-size:10px;color:#566e6e;transition:background .2s}.filter-button:hover{background:#e3eae0}.filter-button[aria-pressed=true]{background:var(--ink);border-color:var(--ink);color:var(--paper)}.filter-button span{font-size:8px;opacity:.65;margin-left:7px}.unit-group{margin-top:40px}.unit-group:first-child{margin-top:0}.unit-heading{display:flex;align-items:center;gap:15px;margin-bottom:19px}.unit-number{font-family:var(--serif);font-size:25px;color:var(--teal);border:1px solid #d7dfd2;width:47px;height:47px;display:grid;place-items:center;background:#f7f8f1}.unit-heading h3{font-size:24px;line-height:1.2;letter-spacing:-.3px}.unit-heading p{font-size:10px;color:var(--muted);margin-top:3px}.unit-line{height:1px;background:#d8dfd4;flex:1;margin-left:10px}.topic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.topic-card{background:var(--paper);border:1px solid #e0e4d9;padding:22px 23px 19px;display:flex;flex-direction:column;min-height:266px;position:relative;border-radius:2px;transition:transform .2s,box-shadow .2s,border-color .2s}.topic-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#aac3b8}.card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:17px}.topic-no{font-size:9px;letter-spacing:1.2px;color:var(--muted);text-transform:uppercase}.card-motif{width:31px;height:31px;color:var(--teal);opacity:.8}.card-motif svg{width:100%;height:100%;stroke:currentColor;fill:none;stroke-width:1.2}.topic-card h4{font:23px/1.2 var(--serif);letter-spacing:-.4px;margin-bottom:10px}.topic-card p{font-size:11px;color:var(--muted);line-height:1.75;margin-bottom:19px;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:3;overflow:hidden}.card-standards{font-size:9px;color:var(--teal);letter-spacing:.25px;margin-top:auto;margin-bottom:16px}.card-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px;border-top:1px solid #edece3;padding-top:14px}.resource-tags{display:flex;flex-wrap:wrap;gap:6px}.resource-tags span{font-size:8px;padding:3px 6px;background:#f0f3ec;border-radius:2px}.card-arrow{color:var(--teal);font-size:19px}.empty-state{text-align:center;padding:70px 30px;border:1px dashed #c7d3c6;background:#f8faf4}.empty-state h3{font-size:28px;margin:10px 0}.empty-state p{color:var(--muted);font-size:12px;margin-bottom:22px}.pack-section{padding:73px 0 79px}.pack-section .section-heading{margin-bottom:34px}.pack-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.pack-card{padding:29px 27px 27px;border:1px solid var(--line);background:var(--paper);position:relative;overflow:hidden}.pack-icon{width:51px;height:51px;margin-bottom:24px;color:var(--teal)}.pack-icon svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.2}.pack-card h3{font-size:26px;letter-spacing:-.5px;margin-bottom:9px}.pack-card p{font-size:11px;color:var(--muted);line-height:1.8;min-height:41px}.pack-caption{display:block;font-size:9px;letter-spacing:1px;text-transform:uppercase;color:var(--teal);margin:19px 0 12px}.pack-links{display:grid;gap:8px}.pack-links a{display:flex;align-items:center;justify-content:space-between;padding:11px 13px;background:#f0f3ec;font-size:10px;border:1px solid transparent}.pack-links a:hover{border-color:#b4c8bf;background:var(--pale-teal)}.guide-banner{margin-top:30px;background:var(--ink);color:#fffdfa;padding:35px 38px;display:flex;align-items:center;justify-content:space-between;gap:30px;position:relative;overflow:hidden}.guide-banner .eyebrow{color:#c9b17b}.guide-banner h3{font-size:28px;margin:7px 0 8px}.guide-banner p{font-size:11px;color:#ced9d7;max-width:610px}.guide-banner .button{flex-shrink:0}.future-section{padding:0 0 75px}.future-card{display:flex;align-items:center;justify-content:space-between;gap:35px;border-top:1px solid var(--line);padding-top:35px}.future-card h3{font-size:26px;margin:8px 0}.future-card p{font-size:11px;color:var(--muted)}.coming-tag{display:inline-flex;align-items:center;gap:9px;padding:10px 15px;border:1px solid #dccbac;color:#8d6c32;font-size:10px;letter-spacing:1px;text-transform:uppercase}.coming-tag:before{content:'';width:5px;height:5px;border-radius:50%;background:var(--gold)}.site-footer{background:#e8ece3;border-top:1px solid #dbe1d4}.footer-inner{max-width:1232px;margin:auto;padding:46px 0 38px;display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:60px}.footer-title{font:27px var(--serif);letter-spacing:-.7px}.gold-dot{color:var(--gold)}.footer-brand p{color:var(--muted);font-size:11px;line-height:1.8;margin-top:13px}.footer-links{display:grid;align-content:start;gap:11px;font-size:11px;padding-top:5px}.footer-links a:hover{color:var(--teal)}.footer-owner .eyebrow{font-size:8px;letter-spacing:1.4px}.footer-owner p{font:18px/1.5 var(--serif);margin:9px 0}.footer-owner>span:last-child{font-size:9px;color:var(--muted)}.footer-bottom{max-width:1232px;margin:auto;border-top:1px solid #d1dace;padding:17px 0;display:flex;justify-content:space-between;gap:20px;font-size:9px;color:var(--muted)}.breadcrumb{display:flex;gap:9px;align-items:center;flex-wrap:wrap;font-size:10px;color:var(--muted);padding:25px 0}.breadcrumb a:hover{color:var(--teal)}.breadcrumb span[aria-hidden]{color:#b0b9ae}.topic-hero{padding:34px 0 43px;display:grid;grid-template-columns:1fr 185px;gap:65px;align-items:center}.topic-hero h1{font-size:52px;line-height:1.08;letter-spacing:-1.4px;margin:14px 0 20px;max-width:850px}.topic-hero .description{font-size:13px;line-height:1.85;color:var(--muted);max-width:735px}.standards-list{display:flex;flex-wrap:wrap;gap:7px;margin-top:20px}.standards-list span{border:1px solid #d8ded3;background:#f3f6ed;font-size:9px;padding:5px 8px;color:var(--teal)}.topic-hero-art{width:160px;height:160px;position:relative;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;background:#f1f0e5}.topic-hero-art:after{content:'';position:absolute;inset:13px;border:1px solid #deded0;border-radius:50%}.topic-hero-art .card-motif{width:82px;height:82px;opacity:.9}.topic-resource-section{border-top:1px solid var(--line);padding:41px 0 60px}.resource-intro{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;margin-bottom:29px}.resource-intro h2{font-size:31px;letter-spacing:-.5px}.resource-intro p{font-size:11px;color:var(--muted);max-width:445px;line-height:1.8}.topic-resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:21px}.resource-family{background:var(--paper);border:1px solid var(--line);padding:23px 19px 20px}.family-header{padding:0 3px 18px;display:flex;gap:14px;justify-content:space-between;align-items:start}.family-header h3{font-size:24px;line-height:1.2;letter-spacing:-.4px}.family-header p{font-size:10px;color:var(--muted);margin-top:6px}.family-number{font:22px var(--serif);color:#b6bbac}.document-choice{display:block;padding:13px;background:#f3f4ed;border:1px solid #e6e8de;margin-top:10px;transition:border-color .2s,background .2s}.document-choice:hover{border-color:#9dbbb0;background:#edf2e8}.choice-top{display:flex;justify-content:space-between;gap:7px;align-items:center;margin-bottom:12px}.choice-label{font-size:10px;font-weight:600}.choice-label.key{color:var(--teal)}.choice-pages{font-size:8px;color:var(--muted)}.document-thumb{background:white;aspect-ratio:8.5/5.1;overflow:hidden;border:1px solid #e5e4dc;position:relative}.document-thumb img{width:100%;height:auto;min-height:100%;object-fit:cover;object-position:top;position:relative;z-index:1}.thumb-fallback{position:absolute;inset:0;padding:14px;font:17px/1.3 var(--serif);background:linear-gradient(white,#fcfdf9)}.thumb-fallback span{display:block;font:7px var(--sans);color:var(--teal);text-transform:uppercase;letter-spacing:1px;margin-bottom:9px}.thumb-fallback:after{content:'';display:block;height:30px;margin-top:15px;background:repeating-linear-gradient(to bottom,transparent 0,transparent 9px,#e0e6da 10px)}.choice-action{font-size:9px;font-weight:600;margin-top:12px;display:flex;justify-content:space-between}.choice-action span{color:var(--teal)}.teacher-note{padding:18px 22px;margin-top:24px;background:var(--pale-gold);font-size:11px;color:#746144;display:flex;gap:12px;align-items:start}.teacher-note svg{width:20px;height:20px;flex-shrink:0;fill:none;stroke:#95713d;stroke-width:1.4}.topic-pagination{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:30px;padding:30px 0 53px}.topic-pagination a{display:block}.topic-pagination a:last-child{text-align:right}.pagination-label{display:block;font-size:9px;color:var(--muted);text-transform:uppercase;letter-spacing:1.1px;margin-bottom:6px}.pagination-title{font:21px/1.3 var(--serif)}.topic-pagination a:hover .pagination-title{color:var(--teal)}.viewer-page{padding-bottom:51px}.viewer-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;background:var(--ink);color:var(--paper);padding:21px 25px}.viewer-title .eyebrow{color:#d0b57e;font-size:8px;letter-spacing:1.5px}.viewer-title h1{font:23px/1.35 var(--serif);margin-top:6px}.viewer-title p{font-size:9px;color:#c1d1ce;margin-top:5px}.viewer-actions{display:flex;gap:7px;flex-wrap:wrap;flex-shrink:0}.viewer-actions .button{min-height:37px;font-size:9px;padding:9px 12px;gap:9px;background:transparent;color:var(--paper);border-color:#526a70}.viewer-actions .button:hover{background:#2d4b55;transform:none}.viewer-actions .button-download{background:#e2bc79;border-color:#e2bc79;color:var(--ink)}.viewer-actions .button svg{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:1.5}.pdf-frame-wrap{background:#e7e6de;border:1px solid var(--line);padding:17px}.pdf-frame{display:block;width:100%;height:calc(100vh - 190px);min-height:680px;border:0;background:white}.viewer-fallback{padding:17px 23px;border:1px solid var(--line);border-top:0;background:var(--paper);display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:10px;color:var(--muted)}.viewer-fallback a{color:var(--teal);border-bottom:1px solid #bfd4c6}.viewer-status{font-size:10px;color:var(--teal);margin-top:12px;min-height:16px}.mobile-document{display:none}.pack-page{padding:42px 0 75px}.pack-page>h1{font-size:53px;letter-spacing:-1.2px;line-height:1.12;max-width:760px;margin:13px 0 22px}.pack-page>.page-description{font-size:13px;color:var(--muted);max-width:685px;line-height:1.85;margin-bottom:38px}.coming-page{padding:65px 0 95px;min-height:520px;display:grid;grid-template-columns:1.2fr .8fr;gap:50px;align-items:center}.coming-page h1{font-size:67px;line-height:1.12;letter-spacing:-2px;margin:18px 0}.coming-page p{max-width:550px;color:var(--muted);font-size:14px;line-height:1.9;margin:18px 0 28px}.coming-art{width:300px;height:300px;max-width:100%;position:relative;background:#efeee1;border-radius:50%;display:grid;place-items:center;margin:auto}.coming-art svg{width:72%;height:72%;fill:none;stroke:var(--teal);stroke-width:1.3}.coming-art:after{content:'';position:absolute;inset:18px;border:1px solid #d9dccb;border-radius:50%}.initial-loading,.error-page,.not-found{max-width:900px;margin:auto;padding:85px 30px;min-height:410px}.initial-loading h1,.error-page h1,.not-found h1{font-size:44px;margin:15px 0 22px;line-height:1.15}.error-page p,.not-found p{font-size:13px;color:var(--muted);margin-bottom:25px;max-width:650px}[hidden]{display:none!important}
@media(min-width:1500px){.hero-inner{min-height:650px}.hero-art{margin-right:0}.hero h1{font-size:62px}}
@media(max-width:1350px){.container,.stats-inner,.educator-inner,.footer-inner,.footer-bottom{margin-left:44px;margin-right:44px}.hero-art{min-height:455px}.paper-preview{width:220px}.paper-quiz{width:204px}.paper-assessment{width:188px}.hero-inner{min-height:595px}.hero h1{font-size:53px}.hero-art-label{left:5%}}
@media(max-width:1080px){.header-inner{padding:23px 30px}.container,.stats-inner,.educator-inner,.footer-inner,.footer-bottom{margin-left:30px;margin-right:30px}.primary-navigation{gap:21px;font-size:11px}.brand-title{font-size:23px}.hero-inner{padding:57px 30px 45px;gap:12px;min-height:560px}.hero h1{font-size:45px;letter-spacing:-1.6px}.hero-art{min-height:415px}.paper-preview{width:195px}.paper-worksheet{left:9%;top:70px}.paper-quiz{left:41%;width:180px}.paper-assessment{left:52%;top:145px;width:164px}.hero-art-label{font-size:8px;bottom:0}.hero-art-label span{font-size:13px}.hero-description{font-size:12px}.hero-actions{gap:17px}.button{font-size:10px;padding:12px 17px}.stat{padding:22px 24px;gap:13px}.stat-number{font-size:34px}.stat-title{font-size:10px}.stat-description{font-size:9px}.editorial-intro{gap:45px;padding:60px 0}.editorial-intro h2{font-size:31px}.intro-detail{gap:23px}.topic-card{padding:20px 18px;min-height:275px}.topic-card h4{font-size:21px}.resource-tags{gap:4px}.resource-tags span{font-size:7px}.pack-card{padding:25px 21px}.pack-card h3{font-size:24px}.topic-hero h1{font-size:46px}.topic-resource-grid{gap:15px}.resource-family{padding:20px 14px}.family-header h3{font-size:21px}.footer-inner{gap:33px}.viewer-toolbar{align-items:flex-start}.viewer-title h1{font-size:20px}.viewer-actions{max-width:280px;justify-content:flex-end}.viewer-actions .button{font-size:8px}}
@media(max-width:800px){.site-topline{font-size:8px;letter-spacing:1.1px;padding:8px 25px}.site-topline span:first-child{display:none}.site-topline{justify-content:center}.header-inner{min-height:87px;padding:20px 25px}.brand-title{font-size:23px}.brand-caption{font-size:7px;letter-spacing:1.7px}.brand-mark{width:34px;height:34px}.menu-toggle{display:flex;justify-content:center;align-items:center;width:38px;height:38px;background:transparent;border:1px solid var(--line);padding:9px}.menu-lines{display:block;width:18px;height:12px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);position:relative}.menu-lines:after{content:'';position:absolute;top:5px;left:0;right:0;border-top:1px solid var(--ink)}.primary-navigation{display:none;position:absolute;top:87px;left:0;right:0;background:var(--paper);padding:19px 25px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);box-shadow:0 12px 20px #18354110;gap:6px;flex-direction:column;align-items:stretch;z-index:30}.primary-navigation.open{display:flex}.primary-navigation a{padding:12px 2px;font-size:12px}.container,.stats-inner,.educator-inner,.footer-inner,.footer-bottom{margin-left:25px;margin-right:25px}.educator-inner{gap:21px}.educator-label{display:none}.educator-link{font-size:10px;gap:7px}.coming-small{font-size:7px}.hero-inner{padding:46px 25px 37px;grid-template-columns:1fr;gap:15px;min-height:0}.hero-copy{padding:0}.hero h1{font-size:49px;max-width:570px;margin:16px 0 19px}.hero-description{max-width:510px;font-size:13px}.hero-actions{margin-top:24px}.hero-note{margin-top:19px}.hero-art{min-height:410px;max-width:535px;width:100%;margin:5px auto 0}.paper-preview{width:210px}.paper-worksheet{left:17%;top:52px}.paper-quiz{left:45%;top:24px;width:195px}.paper-assessment{left:58%;top:126px;width:175px}.hero-art-label{left:8%;bottom:4px;font-size:9px}.hero-art-label span{font-size:14px}.hero-orbit{inset:8px 4% 8px 3%}.stats-inner{grid-template-columns:repeat(3,1fr)}.stat{display:block;padding:23px 17px;text-align:center}.stat:first-child{padding-left:0}.stat:last-child{padding-right:0}.stat-number{font-size:36px;margin-bottom:7px}.stat-title{font-size:9px}.stat-description{font-size:8px}.editorial-intro{grid-template-columns:1fr;gap:25px;padding:46px 0}.editorial-intro h2{font-size:32px;max-width:440px}.intro-detail{padding-top:0;gap:35px}.library-section{padding:46px 0 53px}.section-heading{align-items:flex-start;flex-direction:column;gap:15px;margin-bottom:24px}.section-heading h2{font-size:37px}.section-heading p{max-width:590px}.library-search-row{gap:15px}.library-count{font-size:9px;white-space:nowrap}.filter-row{gap:7px;margin-bottom:29px}.filter-button{font-size:9px;padding:8px 11px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.topic-card{min-height:263px}.topic-card h4{font-size:23px}.resource-tags span{font-size:8px}.unit-heading h3{font-size:23px}.unit-heading p{font-size:9px}.pack-section{padding:48px 0}.pack-grid{gap:13px}.pack-card{padding:23px 15px}.pack-card h3{font-size:22px}.pack-card p{font-size:10px;min-height:61px}.pack-caption{font-size:8px;letter-spacing:.8px}.pack-links a{padding:9px 10px;font-size:9px}.guide-banner{padding:29px 25px;gap:25px}.guide-banner h3{font-size:25px}.guide-banner p{font-size:10px}.future-section{padding:0 0 48px}.footer-inner{grid-template-columns:1fr 1fr;gap:33px;padding:37px 0}.footer-owner{grid-column:1/-1;border-top:1px solid #d5ddce;padding-top:24px;max-width:100%}.footer-owner p{font-size:17px}.footer-bottom{font-size:8px;padding:17px 0}.topic-hero{grid-template-columns:1fr 115px;gap:22px;padding:24px 0 34px}.topic-hero h1{font-size:41px}.topic-hero-art{width:105px;height:105px}.topic-hero-art .card-motif{width:55px;height:55px}.topic-hero-art:after{inset:9px}.topic-hero .description{font-size:12px}.topic-resource-section{padding:32px 0 42px}.resource-intro{align-items:flex-start;flex-direction:column;gap:13px}.resource-intro h2{font-size:29px}.topic-resource-grid{grid-template-columns:1fr;gap:20px}.resource-family{display:grid;grid-template-columns:1fr 1fr;gap:13px;padding:21px}.family-header{grid-column:1/-1;padding:0 0 2px;align-items:center}.family-header h3{font-size:25px}.family-header p{font-size:11px}.family-number{font-size:26px}.document-choice{margin-top:0;padding:12px}.document-thumb{aspect-ratio:8.5/5.7}.choice-label{font-size:11px}.choice-pages{font-size:9px}.choice-action{font-size:10px}.topic-pagination{padding:25px 0 40px}.pagination-title{font-size:20px}.viewer-toolbar{flex-direction:column;gap:17px;padding:21px}.viewer-title h1{font-size:23px}.viewer-actions{max-width:none;justify-content:flex-start;width:100%}.viewer-actions .button{font-size:10px;flex:1}.pdf-frame{min-height:540px;height:72vh}.pdf-frame-wrap{padding:10px}.viewer-fallback{padding:16px 18px;font-size:9px;align-items:start}.pack-page{padding:27px 0 50px}.pack-page>h1{font-size:46px}.coming-page{padding:48px 0 60px;gap:30px}.coming-page h1{font-size:49px}.coming-page p{font-size:12px}.coming-art{width:240px;height:240px}}
@media(max-width:540px){.header-inner{padding:18px 20px}.brand{gap:9px}.brand-title{font-size:21px}.brand-caption{font-size:6.5px;letter-spacing:1.5px}.brand-mark{width:30px;height:30px}.container,.stats-inner,.educator-inner,.footer-inner,.footer-bottom{margin-left:20px;margin-right:20px}.educator-inner{gap:19px;min-height:46px}.educator-link{min-height:46px;font-size:9px;gap:6px}.coming-small{padding:2px 5px;font-size:6.5px}.hero-inner{padding:35px 20px 30px}.eyebrow{font-size:9px;letter-spacing:1.6px}.hero h1{font-size:40px;letter-spacing:-1.25px;line-height:1.11}.hero-description{font-size:12px;line-height:1.85}.hero-actions{gap:19px}.hero-actions .button{padding:12px 15px;font-size:10px}.text-link{font-size:10px;gap:10px}.hero-note{font-size:9px}.hero-art{min-height:333px;margin-top:3px;max-width:380px;margin-right:auto}.paper-preview{width:170px}.paper-worksheet{left:12%;top:53px}.paper-quiz{left:44%;top:29px;width:153px}.paper-assessment{left:57%;top:123px;width:137px}.hero-art-label{left:2%;bottom:0;font-size:7.5px;padding:9px 12px}.hero-art-label span{font-size:12px;margin-right:6px}.hero-orbit{inset:13px 1% 18px 0}.stat{padding:20px 9px}.stat-number{font-size:31px}.stat-title{font-size:8px;line-height:1.6}.stat-description{font-size:7px;line-height:1.6}.editorial-intro{padding:39px 0;gap:25px}.editorial-intro h2{font-size:30px}.intro-detail{gap:20px}.intro-detail h3{font-size:19px}.intro-detail p{font-size:10px;line-height:1.8}.library-section{padding:38px 0 45px}.section-heading h2{font-size:34px}.section-heading p{font-size:11px}.library-search-row{align-items:flex-start;flex-direction:column;gap:10px;margin-bottom:15px}.search-wrap{width:100%;max-width:none}.search-input{font-size:11px;min-height:50px;padding:14px 42px}.search-wrap svg{left:15px;top:16px}.library-count{font-size:9px}.filter-row{gap:6px;margin-bottom:27px}.filter-button{font-size:8px;min-height:32px;padding:7px 10px}.filter-button span{font-size:7px;margin-left:5px}.unit-heading{gap:12px;margin-bottom:15px}.unit-number{font-size:22px;width:40px;height:40px;flex-shrink:0}.unit-heading h3{font-size:21px}.unit-heading p{font-size:8px;line-height:1.6}.unit-line{display:none}.unit-group{margin-top:32px}.topic-grid{grid-template-columns:1fr;gap:12px}.topic-card{min-height:0;padding:19px 21px}.card-top{margin-bottom:11px}.card-motif{width:27px;height:27px}.topic-card h4{font-size:25px;max-width:280px;line-height:1.16}.topic-card p{font-size:11px;margin-bottom:15px;-webkit-line-clamp:2}.card-standards{margin-bottom:13px}.card-bottom{padding-top:12px}.resource-tags span{font-size:8px}.pack-section{padding:40px 0}.pack-grid{grid-template-columns:1fr;gap:15px}.pack-card{padding:24px;display:grid;grid-template-columns:45px 1fr;column-gap:17px}.pack-icon{width:40px;height:40px;grid-column:1;margin:1px 0 0;grid-row:1/4}.pack-card h3,.pack-card p,.pack-caption,.pack-links{grid-column:2}.pack-card h3{font-size:27px}.pack-card p{min-height:0;font-size:11px}.pack-caption{margin:15px 0 9px}.pack-links a{font-size:10px;padding:10px 12px}.guide-banner{padding:26px 24px;flex-direction:column;align-items:flex-start;gap:21px}.guide-banner h3{font-size:26px}.guide-banner p{font-size:11px}.guide-banner .button{font-size:10px}.future-card{align-items:flex-start;gap:20px;padding-top:29px}.future-card h3{font-size:24px}.future-card p{font-size:10px}.coming-tag{font-size:8px;padding:8px 10px;white-space:nowrap;margin-top:6px;gap:6px}.footer-inner{grid-template-columns:1fr;gap:27px;padding:33px 0 27px}.footer-links{padding-top:0;gap:10px}.footer-owner{grid-column:auto;padding-top:23px}.footer-title{font-size:27px}.footer-bottom{flex-direction:column;gap:8px;font-size:8px}.breadcrumb{font-size:9px;padding:21px 0;gap:7px}.topic-hero{grid-template-columns:1fr;gap:0;padding:17px 0 30px}.topic-hero h1{font-size:39px;letter-spacing:-1px;margin:12px 0 17px}.topic-hero-art{display:none}.topic-hero .description{font-size:12px}.standards-list{margin-top:16px}.standards-list span{font-size:8px}.resource-intro h2{font-size:28px}.resource-intro p{font-size:10px}.resource-family{padding:19px 15px;gap:9px}.family-header{padding:0 3px 7px}.family-header h3{font-size:24px}.family-header p{font-size:9px}.document-choice{padding:9px}.choice-top{gap:4px;align-items:flex-start;flex-direction:column;margin-bottom:9px}.choice-label{font-size:10px}.choice-pages{font-size:8px}.document-thumb{aspect-ratio:8.5/7}.choice-action{font-size:9px;line-height:1.6;margin-top:9px}.thumb-fallback{font-size:13px;padding:10px}.thumb-fallback span{font-size:6px}.teacher-note{font-size:10px;padding:15px;gap:9px}.teacher-note svg{width:17px;height:17px}.topic-pagination{gap:23px}.pagination-label{font-size:8px;letter-spacing:.6px}.pagination-title{font-size:18px}.viewer-toolbar{padding:20px 17px;gap:15px}.viewer-title h1{font-size:24px}.viewer-title p{font-size:9px;line-height:1.6}.viewer-actions{gap:5px}.viewer-actions .button{padding:9px 8px;font-size:9px;gap:6px}.viewer-actions .button svg{width:12px;height:12px}.pdf-frame-wrap{display:none}.mobile-document{display:block;background:#e8e9df;padding:20px;border:1px solid var(--line)}.mobile-preview{max-width:360px;margin:auto;background:white;border:1px solid #d8ded2;box-shadow:var(--shadow)}.mobile-preview img{width:100%;height:auto}.mobile-document-caption{text-align:center;font-size:9px;color:var(--muted);margin:16px 0 14px;line-height:1.8}.mobile-document .button{display:flex;max-width:360px;margin:auto;font-size:11px}.mobile-pdf-panel{background:var(--paper);padding:37px 24px;text-align:center;border:1px solid var(--line);max-width:360px;margin:auto}.mobile-pdf-panel .pack-icon{margin:0 auto 19px;width:60px;height:60px}.mobile-pdf-panel h2{font-size:27px;line-height:1.3}.mobile-pdf-panel p{font-size:11px;line-height:1.8;color:var(--muted);margin-top:13px}.viewer-fallback{font-size:9px;flex-direction:column;gap:7px;padding:15px 17px}.viewer-page{padding-bottom:37px}.viewer-status{font-size:9px}.pack-page{padding:17px 0 40px}.pack-page>h1{font-size:39px;margin:12px 0 19px}.pack-page>.page-description{font-size:12px;margin-bottom:27px}.coming-page{grid-template-columns:1fr;padding:36px 0 48px;gap:38px}.coming-page h1{font-size:47px;letter-spacing:-1.4px}.coming-page p{font-size:12px}.coming-art{width:210px;height:210px}.initial-loading,.error-page,.not-found{padding:55px 20px;min-height:330px}.initial-loading h1,.error-page h1,.not-found h1{font-size:36px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}.button:hover,.topic-card:hover,.paper-preview:hover{transform:none}}
@media print{.site-header,.site-topline,.site-footer,.viewer-actions,.breadcrumb,.viewer-fallback,.viewer-status,.skip-link{display:none}.container{margin:0;max-width:none}.viewer-toolbar{background:white;color:black}.pdf-frame{height:95vh}.pdf-frame-wrap{display:block;border:0;padding:0}.mobile-document{display:none}}
/* Readable editorial type at every screen size. */
button:focus-visible,a:focus-visible,input:focus-visible,iframe:focus-visible{outline-color:var(--teal-dark)}
.brand-caption{font-size:10px;letter-spacing:1.5px}.primary-navigation{font-size:13px}.educator-label{font-size:10px}.educator-link{font-size:12px}.coming-small{font-size:10px}.eyebrow{font-size:11px;letter-spacing:1.6px}.hero-description{font-size:15px}.hero-note{font-size:12px}.button{font-size:13px;min-height:46px}.button-small{font-size:12px;min-height:42px}.text-link{font-size:13px}.stat-title{font-size:12px}.stat-description{font-size:12px;line-height:1.5}.intro-detail p,.section-heading p{font-size:14px}.search-input{font-size:16px}.library-count{font-size:12px}.filter-button{font-size:12px;min-height:42px;padding:10px 14px}.filter-button span{font-size:11px}.unit-heading p{font-size:12px;line-height:1.6}.topic-no{font-size:11px}.topic-card{min-height:303px}.topic-card h4{font-size:25px}.topic-card p{font-size:14px;line-height:1.7}.card-standards{font-size:11px}.resource-tags{gap:6px}.resource-tags span{font-size:11px;padding:4px 6px}.empty-state p{font-size:14px}.pack-card p{font-size:14px;min-height:71px}.pack-caption{font-size:11px;line-height:1.6}.pack-links a{font-size:12px;min-height:44px;gap:8px}.guide-banner p{font-size:14px}.future-card p{font-size:13px}.coming-tag{font-size:11px}.footer-brand p,.footer-links{font-size:13px}.footer-owner .eyebrow{font-size:10px}.footer-owner>span:last-child,.footer-bottom{font-size:12px}.breadcrumb{font-size:12px}.topic-hero .description{font-size:15px}.standards-list span{font-size:12px}.resource-intro p{font-size:14px}.family-header p{font-size:12px}.choice-label{font-size:13px}.choice-pages{font-size:12px}.choice-action{font-size:12px;line-height:1.6}.teacher-note{font-size:13px}.pagination-label{font-size:11px}.viewer-title .eyebrow{font-size:11px}.viewer-title p{font-size:12px}.viewer-actions .button{font-size:12px;min-height:44px}.viewer-fallback,.viewer-status{font-size:12px;line-height:1.8}.viewer-fallback{align-items:start}.pack-page>.page-description{font-size:15px}.coming-page p{font-size:15px}.error-page p,.not-found p{font-size:15px}.mobile-document-caption{font-size:12px}.mobile-pdf-panel p{font-size:14px}.mobile-document .button{font-size:14px;min-height:46px}
@media(max-width:1080px){.primary-navigation{gap:18px;font-size:12px}.topic-card{padding:21px 18px}.topic-card h4{font-size:24px}.resource-tags span{font-size:10px}.pack-card{padding:25px 19px}.viewer-actions{max-width:320px}.viewer-actions .button{font-size:11px}.guide-banner{gap:24px}}
@media(max-width:800px){.primary-navigation a{font-size:14px;min-height:44px}.educator-link{font-size:12px}.coming-small{font-size:10px}.hero-description{font-size:15px}.hero-note{font-size:12px}.button{font-size:13px;min-height:46px}.stat{padding:22px 14px}.stat-title,.stat-description{font-size:12px}.stat-title{line-height:1.5}.intro-detail p,.section-heading p{font-size:14px}.library-search-row{align-items:flex-start;flex-direction:column;gap:12px}.search-wrap{width:100%;max-width:none}.library-count{font-size:12px}.filter-button{font-size:12px;min-height:44px}.filter-button span{font-size:11px}.topic-card{min-height:304px}.topic-card p{font-size:14px}.resource-tags span{font-size:11px}.pack-grid{grid-template-columns:1fr}.pack-card{padding:25px;display:grid;grid-template-columns:49px 1fr;column-gap:20px}.pack-icon{width:45px;height:45px;grid-column:1;margin:2px 0 0;grid-row:1/4}.pack-card h3,.pack-card p,.pack-caption,.pack-links{grid-column:2}.pack-card h3{font-size:28px}.pack-card p{font-size:14px;min-height:0}.pack-caption{font-size:11px;margin:18px 0 11px}.pack-links a{font-size:13px;min-height:44px;padding:11px 14px}.guide-banner{align-items:flex-start;flex-direction:column;gap:23px}.guide-banner p{font-size:14px}.guide-banner .button{font-size:13px}.future-card p{font-size:13px}.footer-links{font-size:13px}.footer-owner>span:last-child,.footer-bottom{font-size:12px}.topic-hero .description{font-size:15px}.family-header p{font-size:12px}.choice-label{font-size:13px}.choice-pages{font-size:12px}.choice-action{font-size:12px}.resource-intro p{font-size:14px}.viewer-actions{max-width:none}.viewer-actions .button{font-size:12px}.viewer-title p,.viewer-fallback{font-size:12px}.breadcrumb{font-size:12px}}
@media(max-width:540px){.brand-title{font-size:21px}.brand-caption{font-size:10px;letter-spacing:.6px}.educator-inner{gap:15px}.educator-link{font-size:11px;gap:6px;flex-wrap:wrap;align-content:center;line-height:1.4;padding:9px 0}.coming-small{font-size:9px}.eyebrow{font-size:11px}.hero-description{font-size:14px}.hero-actions{align-items:flex-start;gap:18px}.hero-actions .button{font-size:12px;padding:13px 15px;min-height:46px}.text-link{font-size:12px;min-height:35px}.hero-note{font-size:11px;align-items:flex-start;line-height:1.7}.hero-note svg{margin-top:2px;flex-shrink:0}.stat{padding:21px 6px}.stat-title{font-size:11px;line-height:1.5}.stat-description{font-size:11px;margin-top:5px;line-height:1.5}.intro-detail{grid-template-columns:1fr;gap:25px}.intro-detail article{padding-top:0}.intro-detail h3{font-size:24px}.intro-detail p,.section-heading p{font-size:14px}.intro-rule{margin-bottom:11px}.library-count{font-size:12px;white-space:normal}.search-input{font-size:16px;padding:14px 42px;min-height:52px}.search-wrap svg{top:18px}.search-clear{top:8px;right:8px;min-width:36px;min-height:36px}.filter-row{gap:7px}.filter-button{font-size:12px;min-height:44px;padding:10px 12px}.filter-button span{font-size:11px}.unit-heading p{font-size:12px}.unit-heading h3{font-size:23px}.unit-heading{align-items:start}.unit-number{margin-top:2px}.topic-card{min-height:0;padding:21px}.topic-card h4{font-size:27px;max-width:100%}.topic-card p{font-size:14px;-webkit-line-clamp:3;line-height:1.75}.topic-no{font-size:11px}.card-standards{font-size:12px;line-height:1.6}.resource-tags span{font-size:11px}.pack-card{padding:23px;grid-template-columns:1fr;gap:0}.pack-icon{grid-row:auto;grid-column:1;margin:0 0 20px;width:46px;height:46px}.pack-card h3,.pack-card p,.pack-caption,.pack-links{grid-column:1}.pack-card h3{font-size:29px}.pack-card p{font-size:14px}.pack-caption{font-size:11px}.pack-links a{font-size:13px;min-height:46px}.guide-banner p{font-size:14px}.guide-banner .button{font-size:13px}.future-card{flex-direction:column;gap:15px}.future-card p{font-size:14px}.coming-tag{font-size:11px}.footer-brand p,.footer-links{font-size:13px}.footer-owner .eyebrow{font-size:11px}.footer-owner>span:last-child{font-size:12px}.footer-bottom{font-size:11px;line-height:1.8}.breadcrumb{font-size:12px;line-height:1.8}.topic-hero .description{font-size:14px}.standards-list span{font-size:12px}.resource-intro p{font-size:14px}.family-header h3{font-size:27px}.family-header p{font-size:12px;line-height:1.6}.resource-family{padding:21px 15px;gap:11px}.choice-label{font-size:12px}.choice-pages{font-size:11px}.choice-action{font-size:12px}.teacher-note{font-size:13px;line-height:1.8}.pagination-label{font-size:11px;line-height:1.6}.pagination-title{font-size:21px}.viewer-title .eyebrow,.viewer-title p{font-size:12px}.viewer-title p{line-height:1.7}.viewer-actions{gap:7px}.viewer-actions .button{font-size:12px;padding:10px 9px;min-height:44px}.viewer-fallback{font-size:12px;line-height:1.8}.viewer-status{font-size:12px}.mobile-document-caption{font-size:12px}.mobile-document .button{font-size:14px;min-height:46px}.pack-page>.page-description{font-size:14px}.coming-page p{font-size:14px}.empty-state p{font-size:14px}}
@media(max-width:800px){.menu-toggle{width:44px;height:44px}.search-clear{width:44px;height:44px;top:5px;right:5px}.hero-actions .text-link{min-height:44px}}
.viewer-actions a:focus-visible,.viewer-actions button:focus-visible,.guide-banner a:focus-visible{outline-color:var(--gold)}