@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;650;700&family=Manrope:wght@400;500;600;650;700;750;800&display=swap');
:root{--green:#244b3c;--ink:#24382f;--muted:#69766e;--line:#e3e6df;--cream:#f8f9f5;--paper:#fff;--lime:#e6eddc;--serif:Georgia,'Times New Roman',serif;font-family:'DM Sans',Arial,sans-serif;color:var(--ink);background:var(--cream);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:inherit}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button,a,select{touch-action:manipulation}button{cursor:pointer}a{text-underline-offset:4px}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #a86b37;outline-offset:4px}svg{display:block}button svg,a svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-100px;left:16px;z-index:30;padding:12px 20px;background:var(--green);color:#fff}.skip-link:focus{top:10px}
.site-header{height:90px;padding:0 42px;display:flex;align-items:center;gap:28px;border-bottom:1px solid var(--line);background:#fff;position:relative;z-index:5}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;min-width:205px}.brand-mark{width:48px;height:50px;background:var(--green);color:#f4f2df;border-radius:14px;display:grid;place-items:center}.brand-mark svg{width:34px;height:34px;stroke-width:1.5}.brand strong{font-family:Manrope,Arial,sans-serif;font-size:26px;letter-spacing:-1.1px;line-height:1.15}.brand small{display:block;font-size:9px;letter-spacing:2.3px;font-weight:700;margin-top:4px}.school-name{font-size:12px;color:#56635b;margin-left:24px;padding-left:28px;border-left:1px solid var(--line);line-height:1.6}.school-name span{display:block;color:#7a847d;font-size:11px}.header-link{margin-left:auto;font-size:12px;font-weight:600;display:flex;gap:16px;text-decoration:none}.header-link span{color:#72836b;font-size:20px}.menu-button{display:none;border:1px solid var(--line);background:white;border-radius:8px;width:42px;height:42px;font-size:21px}
.layout{display:grid;grid-template-columns:254px minmax(0,1fr);max-width:1800px;margin:auto}.sidebar{background:#fff;border-right:1px solid var(--line);padding:30px 19px 25px;position:sticky;top:0;height:100vh;overflow-y:auto;scrollbar-width:thin}.nav-link{display:flex;align-items:center;gap:10px;text-decoration:none;border-radius:7px;min-height:41px;font-size:11px;padding:9px 10px;color:#53645b}.nav-link:hover{background:#f5f7f0}.nav-link.active{background:#eaf0e4;color:#244b3c;font-weight:700}.all-link{font-size:12px;font-weight:600;min-height:44px}.four-squares{font-size:22px;line-height:1}.nav-count{margin-left:auto;font-size:10px;color:#7a887d}.all-link .nav-count{background:#dfe9d8;border-radius:4px;padding:3px 6px;color:#466043}.nav-label{font-size:9px;font-weight:700;letter-spacing:1.55px;color:#7a877e;margin:28px 10px 10px}.grade-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0}.grade-a{background:#75916a}.grade-b{background:#d49b63}.grade-c{background:#8c8caf}.topic-nav .nav-link{font-size:11px;padding-block:9px;line-height:1.35;align-items:flex-start;min-height:37px}.cycle-num{font-size:10px;color:#8c958d;font-variant-numeric:tabular-nums;padding-top:1px;min-width:17px}.sidebar-note{border-top:1px solid var(--line);margin:25px 10px 0;padding-top:24px;display:flex;gap:10px;font-size:10px;line-height:1.6;color:#63755e}.sidebar-note>span{font-size:23px;color:#83996d}.sidebar-note small{display:block;color:#8a9588;font-size:9px;margin-top:3px}
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.library-section{margin-top:36px;scroll-margin-top:20px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px}.section-head h2{font-family:Manrope,Arial,sans-serif;font-size:21px;letter-spacing:-.7px;font-weight:700;margin:0 0 6px}.section-head p{font-size:11px;color:#7a847b;margin:0;line-height:1.6}.section-head .tiny-pill{border:1px solid #dfe5d9;border-radius:30px;padding:7px 11px;color:#69805e;font-size:9px;white-space:nowrap}.search-row{display:flex;gap:12px}.search-box{display:flex;align-items:center;gap:12px;flex:1;min-width:0;border:1px solid #dde3d9;background:#fff;border-radius:8px;padding:0 14px;height:47px}.search-box>svg{width:17px;height:17px;fill:none;stroke:#7a887b;stroke-width:1.7;flex-shrink:0}.search-box input{border:0;background:transparent;outline:none!important;min-width:0;width:100%;font-size:12px;color:var(--ink);height:100%}.search-box:focus-within{outline:2px solid #769365;outline-offset:2px}.search-box 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#e7ebe1;position:relative;min-height:126px}.topic-topline{display:flex;justify-content:space-between;gap:10px;align-items:center;font-size:9px;color:#788774}.cycle-tag{font-size:8px;letter-spacing:1.2px;font-weight:700;display:flex;align-items:center;gap:7px;color:#5d7653}.topic-icon{display:flex;align-items:center;justify-content:center;width:23px;height:23px;border:1px solid #d6e0cb;border-radius:50%;font-family:var(--serif);font-size:14px;color:#71905d;background:#ffffff80}.topic-card h3{font-family:Manrope,Arial,sans-serif;font-size:17px;letter-spacing:-.45px;line-height:1.35;margin:10px 0 0;max-width:95%;font-weight:650;min-height:46px}.topic-card-head small{display:block;font-size:9px;color:#7d8a78;margin-top:8px}.packet-list{padding:0 18px}.packet-row{display:flex;align-items:center;gap:9px;min-height:57px;border-bottom:1px solid #edf0e8}.packet-row:last-child{border:0}.packet-link{display:flex;align-items:center;flex:1;min-width:0;text-decoration:none;gap:9px;min-height:53px}.grade-tag{font-size:9px;line-height:1.2;white-space:nowrap;padding:5px 7px;border-radius:4px;min-width:45px;text-align:center;color:#5a7750;background:#eef3e8;flex-shrink:0;font-weight:600}.grade-tag.b{background:#fbf0e3;color:#90683d}.grade-tag.c{background:#f0eef7;color:#777092}.packet-label{min-width:0;display:flex;flex-direction:column;gap:3px}.packet-label strong{font-size:10px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.packet-label small{font-size:8px;color:#97a08f;letter-spacing:.3px}.view-arrow{margin-left:auto;font-size:15px;color:#6e8561;opacity:.75;flex-shrink:0}.packet-link:hover .packet-label strong{text-decoration:underline;text-underline-offset:3px}.download-icon{padding:9px;border-radius:5px;text-decoration:none;color:#75856d;flex-shrink:0}.download-icon svg{width:15px;height:15px}.download-icon:hover{background:#edf3e7;color:#2d4b28}.topic-card-footer{padding:10px 22px;border-top:1px solid #edf0e8;display:flex;justify-content:space-between;font-size:8px;color:#97a08f}.topic-card-footer span:first-child{color:#7d8b74}.empty-state{grid-column:1/-1;padding:55px 20px;text-align:center;border:1px dashed #c9d4bf;border-radius:10px}.empty-state h3{font-family:Manrope,Arial,sans-serif;font-size:21px;margin:0 0 10px}.empty-state p{color:#7a8772;font-size:13px;margin-bottom:22px}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;text-decoration:none;border:1px solid #d7dfcf;border-radius:7px;background:white;color:#45613b;padding:12px 17px;font-size:11px;min-height:42px;font-weight:500}.button:hover{background:#f3f6ee;border-color:#91a47f}.button.primary{background:var(--green);border-color:var(--green);color:white}.button.primary:hover{background:#345d49}.collection-note{font-size:10px;color:#889280;line-height:1.9;margin:21px 0 0}.contents-banner{display:flex;align-items:center;gap:22px;border:1px solid #e3e4d7;background:#f3f2e8;border-radius:10px;margin-top:38px;padding:26px}.contents-art{font-size:28px;color:#9c9d72;flex-shrink:0;background:#e9e9d7;border-radius:9px;width:54px;height:62px;display:grid;place-items:center}.contents-art svg{width:25px;height:30px;stroke:currentColor;fill:none;stroke-width:1.3}.contents-banner h2{font-family:Manrope,Arial,sans-serif;font-size:16px;letter-spacing:-.4px;margin:0 0 6px;font-weight:650}.contents-banner 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.breadcrumb{display:flex;flex-wrap:wrap;gap:10px;font-size:10px;color:#86917e;margin-bottom:30px;line-height:1.8}.breadcrumb a{text-decoration:none;color:#5e7653}.detail-header{max-width:850px}.detail-kicker{display:flex;align-items:center;gap:10px;font-size:9px;letter-spacing:1.2px;color:#6e865f;font-weight:600;margin-bottom:14px}.detail-kicker .grade-tag{letter-spacing:0}.detail-header h1{font-family:Manrope,Arial,sans-serif;font-size:clamp(30px,3.5vw,44px);line-height:1.2;letter-spacing:-1.5px;font-weight:650;margin:0 0 14px}.detail-subtitle{font-size:14px;color:#6c7c64;margin:0 0 15px}.detail-description{max-width:750px;font-size:13px;color:#7a8673;line-height:1.85;margin:0}.detail-meta{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:10px;color:#7c8974;margin-top:20px}.detail-meta span+span:before{content:'·';margin-right:18px;color:#bbc5b4}.detail-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:9px;margin:25px 0}.detail-toolbar .button{font-size:11px}.grade-switch{display:flex;align-items:center;gap:8px;border-top:1px solid var(--line);padding-top:19px;margin:5px 0 25px;font-size:10px;color:#7a8873}.grade-switch>a{text-decoration:none;min-height:33px;padding:9px 12px;border-radius:5px;border:1px solid #dfe5d9;background:#fff}.grade-switch>a[aria-current=page]{background:#e6eddf;border-color:#afc09e;color:#38572e}.reader-fallback{border:1px solid var(--line);border-radius:10px;padding:30px;font-size:13px;color:#788670;background:#f0f4eb}.reader-fallback a{color:var(--green)}.pdf-help{font-size:11px;color:#86927b;line-height:1.8;margin:17px 0}.pdf-help a{color:#5b7750}.copy-fallback{display:block;width:100%;border:1px solid #98ad88;background:#fff;padding:12px;border-radius:6px;margin-bottom:20px;font-size:12px}.lesson-pagination{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}.lesson-pagination a{text-decoration:none;line-height:1.6;font-size:12px;max-width:300px}.lesson-pagination a.next{text-align:right;justify-self:end;grid-column:2}.lesson-pagination small{display:block;font-size:9px;color:#87947d;margin-bottom:7px}.contents-summary{margin-top:40px}.contents-summary h2{font-size:20px;font-family:Manrope,Arial,sans-serif}.contents-table{border-collapse:collapse;width:100%;font-size:11px;background:white;border:1px solid var(--line)}.contents-table caption{text-align:left;color:#7c8973;line-height:1.8;padding:0 0 16px;font-size:11px}.contents-table th,.contents-table td{padding:13px 12px;border-bottom:1px solid #e6ebdf;text-align:left;line-height:1.6}.contents-table th{background:#ecf1e5;font-size:9px;font-weight:600;color:#5a7350}.contents-table td:first-child{color:#7b8b70;font-variant-numeric:tabular-nums}.contents-table a{color:#4d7040;white-space:nowrap}.contents-table td:nth-child(2){font-weight:500}.toc-table-scroll{overflow-x:auto}.contents-note{background:#eff2e7;color:#718363;font-size:11px;padding:15px 20px;border-radius:7px;line-height:1.8;margin:20px 0}
@media(min-width:1550px){.lesson-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.hero-art{width:240px}.hero{padding-right:65px}main{padding:40px 55px 55px}.hero p.lead{max-width:430px}}
@media(max-width:1200px){.site-header{padding-inline:25px}.layout{grid-template-columns:220px minmax(0,1fr)}.sidebar{padding-inline:12px}main{padding:28px 28px 40px}.hero{padding:30px;min-height:290px}.hero-art{width:160px}.hero h1{font-size:36px}.hero p.lead{font-size:11px}.stats span{padding-inline:11px;font-size:9px}.stats strong{font-size:16px}.topic-card-head{padding:19px 18px 15px}.topic-card h3{font-size:16px}.packet-list{padding-inline:12px}.packet-row{gap:3px}.packet-link{gap:7px}.download-icon{padding:8px}.packet-label strong{font-size:9px}.topic-card-footer{padding-inline:18px}.contents-banner{padding:22px;flex-wrap:wrap;gap:16px}.contents-actions{margin-left:70px}.school-name{margin-left:0}.site-footer{padding-inline:25px}}
@media(max-width:980px){.hero-art{display:none}.hero{min-height:0}.hero h1{font-size:39px}.hero p.lead{max-width:430px;font-size:12px}.topic-topline{align-items:flex-start;font-size:8px}.topic-icon{display:none}.packet-label strong{font-size:10px}.packet-link{gap:8px}.packet-row{flex-wrap:nowrap}.packet-label{max-width:calc(100% - 50px)}.view-arrow{display:none}.lesson-grid{grid-template-columns:minmax(0,1fr)}.topic-card-head{min-height:108px}.topic-card h3{min-height:0;font-size:18px}.packet-row{min-height:55px}.packet-link{min-height:55px}.packet-label strong{font-size:11px}.topic-card-footer{font-size:9px}.school-name{display:none}.section-head .tiny-pill{display:none}.filter-row{align-items:flex-start;flex-wrap:wrap}.result-meta{margin-left:auto}.contents-actions{margin-left:0}.grade-switch{flex-wrap:wrap}}
@media(max-width:700px){.site-header{height:75px;padding:0 20px;gap:15px}.brand{min-width:0;gap:9px}.brand-mark{width:39px;height:42px;border-radius:11px}.brand-mark svg{width:29px;height:29px}.brand strong{font-size:23px}.brand small{font-size:8px;letter-spacing:1.7px}.header-link{font-size:10px;gap:7px}.header-link span{font-size:16px}.menu-button{display:block;flex-shrink:0;width:36px;height:36px}.layout{display:block}.sidebar{display:none;position:relative;height:auto;border-bottom:1px solid var(--line);padding:18px 20px 25px}.sidebar.open{display:block}.topic-nav{display:grid;grid-template-columns:1fr 1fr;gap:2px 10px}.topics-label{margin-top:20px}.sidebar-note{display:none}.grade-nav{display:flex;flex-wrap:wrap}.grade-nav .nav-count{display:none}.nav-label{margin-top:20px}.nav-link{font-size:11px}.all-link{width:100%}main{padding:22px 20px 35px}.hero{padding:28px 26px;border-radius:12px}.hero .eyebrow{font-size:8px;letter-spacing:1.4px}.hero h1{font-size:36px;letter-spacing:-1.6px}.hero p.lead{font-size:11px;line-height:1.85}.stats{margin-top:23px;flex-wrap:wrap;gap:12px 0}.stats span{font-size:9px;padding-inline:12px}.stats strong{font-size:16px}.library-section{margin-top:28px}.section-head{margin-bottom:15px}.section-head h2{font-size:20px}.section-head p{font-size:10px}.search-row{flex-wrap:wrap;gap:8px}.search-box{flex-basis:100%}.search-box input{font-size:11px}.term-select{height:35px;min-height:35px;width:100%;font-size:10px}.filter-row{margin:12px 0 16px;gap:12px}.grade-filters{width:100%;justify-content:space-between;gap:3px}.grade-filters button{flex:1;padding:8px 6px;font-size:9px}.result-meta{width:100%;text-align:left;margin-left:0}.results-topline{margin-bottom:12px}.lesson-grid{gap:15px}.topic-card-head{padding:20px 20px 17px}.topic-topline{font-size:9px}.topic-icon{display:flex}.topic-card h3{font-size:18px}.packet-list{padding-inline:17px}.packet-label{max-width:calc(100% - 70px)}.packet-label strong{font-size:10px}.view-arrow{display:block}.topic-card-footer{padding-inline:20px;font-size:8px}.contents-banner{padding:22px;gap:17px;align-items:flex-start}.contents-art{width:43px;height:51px}.contents-banner h2{font-size:15px}.contents-banner>div:nth-child(2){flex:1}.contents-banner p{font-size:10px}.contents-actions{width:100%;justify-content:flex-start;margin-top:3px;gap:17px}.contents-actions .button{font-size:10px}.site-footer{flex-wrap:wrap;gap:9px;padding:22px 20px;font-size:8px}.site-footer>a{margin-left:auto}.breadcrumb{font-size:9px;gap:7px;margin-bottom:23px}.detail-header h1{font-size:31px;letter-spacing:-1px}.detail-subtitle{font-size:12px}.detail-description{font-size:12px}.detail-meta{font-size:9px;gap:8px 12px}.detail-meta span+span:before{margin-right:12px}.detail-toolbar{gap:7px;margin:20px 0}.detail-toolbar .button{padding:10px 12px;font-size:10px;gap:7px}.detail-toolbar svg{width:15px;height:15px}.grade-switch{font-size:9px}.grade-switch>a{padding-inline:9px}.lesson-pagination{gap:15px}.lesson-pagination a{font-size:10px}.contents-table th,.contents-table td{padding:11px 10px;font-size:10px}.contents-table{min-width:560px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.nav-link,.topic-nav .nav-link{font-size:12px}.nav-label{font-size:10px}.cycle-num{font-size:11px}.nav-count{font-size:11px}.hero p.lead{font-size:13px;max-width:420px}.stats span{font-size:11px}.section-head p{font-size:12px}.search-box input{font-size:13px}.grade-filters button{font-size:12px}.result-meta{font-size:11px}.term-select{font-size:12px}.topic-topline{font-size:10px}.cycle-tag{font-size:9px}.topic-card h3{font-size:20px;min-height:54px}.packet-row,.packet-link{min-height:64px}.packet-label strong{font-size:12px}.packet-label small{font-size:10px}.grade-tag{font-size:11px}.topic-card-footer{font-size:10px}.collection-note{font-size:11px}.contents-banner p{font-size:12px}.contents-banner h2{font-size:18px}.button,.detail-toolbar .button{font-size:12px}.text-link{font-size:11px}.detail-description{font-size:14px}.detail-meta{font-size:11px}.grade-switch{font-size:11px}.pdf-help{font-size:12px}.contents-table{font-size:12px}.contents-table th{font-size:10px}.contents-table caption{font-size:12px}
@media(max-width:980px){.topic-card h3{min-height:0}.packet-label strong{font-size:13px}.topic-card-footer{font-size:10px}}
@media(max-width:700px){.nav-link,.topic-nav .nav-link{font-size:12px}.hero p.lead{font-size:12px}.stats span{font-size:10px;padding-inline:10px}.section-head p{font-size:11px;line-height:1.8}.search-box input{font-size:12px}.grade-filters button{font-size:11px;padding-inline:4px}.term-select{font-size:11px}.topic-card h3{font-size:20px}.topic-topline{font-size:9px}.packet-label strong{font-size:12px}.packet-label small{font-size:9px}.grade-tag{font-size:10px}.topic-card-footer{font-size:9px}.contents-banner p{font-size:11px}.contents-banner h2{font-size:17px}.detail-toolbar .button{font-size:11px}.detail-meta{font-size:10px}.detail-description{font-size:13px}.contents-table th,.contents-table td{font-size:11px}}
@media print{.site-header,.sidebar,.hero-art,.search-row,.filter-row,.results-topline,.grade-switch,.detail-toolbar,.lesson-pagination,.site-footer{display:none!important}.layout{display:block}main{padding:0}.lesson-grid{grid-template-columns:1fr 1fr}.topic-card{break-inside:avoid}.hero{min-height:0}.contents-actions{display:none}}