:root{--ink:#203b38;--muted:#60716a;--paper:#f8f7f1;--border:#d8ded3;--green:#173b3a;--lime:#e4eeca;--orange:#f0a37b;--teal:#91b9ad;--focus:#885013;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}a{color:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.6}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--focus);outline-offset:4px}[hidden]{display:none!important}.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{position:fixed;z-index:10;top:12px;left:12px;background:white;padding:12px;transform:translateY(-150%)}.skip:focus{transform:none}.site-header,main,.site-footer{max-width:1280px;margin:auto;padding-left:44px;padding-right:44px}.site-header{display:flex;align-items:center;justify-content:space-between;min-height:102px;border-bottom:1px solid var(--border);gap:24px}.brand{display:flex;gap:13px;align-items:center;text-decoration:none}.brand-mark{display:grid;place-items:center;width:47px;height:47px;background:var(--green);color:var(--lime);border-radius:13px;font-size:34px}.brand small{font-size:10px;letter-spacing:1.7px;font-weight:750;display:block;margin-bottom:2px}.brand strong{font-size:23px;line-height:1.1;letter-spacing:-.8px}.site-header nav{display:flex;align-items:center;gap:28px}.quiet-link{font-size:13px;text-decoration:none;font-weight:600}.quiet-link:hover{text-decoration:underline}.outline-button{border:1px solid #bfcac0;background:transparent;color:var(--ink);padding:12px 17px;border-radius:8px;min-height:44px;font-size:13px;font-weight:650}.outline-button:hover{background:#ecefe5}.outline-button[aria-pressed=true]{background:var(--green);color:white}.hero{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center;padding:44px 0 42px}.eyebrow{margin:0 0 15px;font-size:10px;line-height:1.5;letter-spacing:1.8px;font-weight:800}.tiny-star{margin-right:5px;font-size:15px}.hero h1{font-size:clamp(42px,4.3vw,64px);line-height:1.04;letter-spacing:-2.8px;margin:0 0 21px;font-weight:650}.hero h1 span{color:#537c64}.hero-description{font-size:15px;line-height:1.7;color:var(--muted);margin:0 0 17px}.text-link{display:inline-flex;gap:27px;align-items:center;min-height:44px;font-size:13px;text-decoration:none;font-weight:750}.text-link:hover{text-decoration:underline}.hero-art svg{width:100%;display:block}.art-note{font-family:Georgia,serif;font-style:italic;text-align:center;color:#617760;font-size:16px;margin:3px 0 0}.library{border-top:1px solid var(--border);padding-top:30px;scroll-margin-top:20px}.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:15px;margin-bottom:22px}.section-heading .eyebrow{font-size:9px;margin-bottom:6px;letter-spacing:1.5px;color:var(--muted)}h2{font-size:25px;line-height:1.25;letter-spacing:-.8px;margin:0}.library-count{font-size:12px;color:var(--muted);padding-bottom:4px}.library-tools{display:flex;justify-content:space-between;gap:18px;margin-bottom:24px}.filters{display:flex;gap:6px;padding:4px;border-radius:10px;background:#edeFE6;flex-wrap:wrap}.filters button{border:none;background:transparent;border-radius:7px;padding:11px 17px;font-size:12px;font-weight:700;color:#536458;min-height:42px}.filters button[aria-pressed=true]{background:var(--green);color:#fff;box-shadow:0 2px 4px #163e3112}.filters button:not([aria-pressed=true]):hover{background:#dfe6d7}.filters button span{font-size:16px;padding-right:5px}.search{display:flex;align-items:center;gap:10px;border:1px solid var(--border);padding:0 15px;border-radius:9px;min-width:275px;background:#fffefa}.search svg{width:18px;height:18px;stroke:#67796d;stroke-width:1.7;fill:none}.search input{border:0;outline:0;background:transparent;padding:13px 0;color:var(--ink);width:100%;min-width:0;font-size:13px;min-height:48px}.search:focus-within{outline:3px solid var(--focus);outline-offset:3px}.search input:focus-visible{outline:0}.demo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.demo-card{display:flex;flex-direction:column;border:1px solid var(--border);background:#fffefb;border-radius:13px;overflow:hidden;min-width:0;transition:transform .15s,box-shadow .15s}.demo-card:hover{transform:translateY(-3px);box-shadow:0 8px 16px #203b380b}.card-art{position:relative;background:#edf0e3;height:153px;border-bottom:1px solid #203b3814;display:grid;place-items:center}.card-art.fractions{background:#f7e4d5}.card-art.ecosystems{background:#e2ebd1}.card-art.adaptations{background:#dce9e6}.card-art svg{width:100%;height:100%;max-width:350px}.card-badge{position:absolute;top:13px;left:13px;border:1px solid #203b3822;border-radius:5px;padding:5px 7px;font-size:9px;letter-spacing:1.1px;font-weight:800;background:#fffdf2df}.card-content{display:flex;flex-direction:column;flex:1;padding:21px}.card-meta{display:flex;justify-content:space-between;gap:8px;font-size:10px;font-weight:650;color:var(--muted);margin:0 0 11px}.card-content h3{margin:0 0 11px;font-size:21px;line-height:1.2;letter-spacing:-.6px}.card-content p{font-size:13px;line-height:1.65;color:var(--muted);margin:0 0 19px;flex:1}.card-action{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--border);padding:16px 0 0;margin-top:auto;font-size:12px;font-weight:750;text-decoration:none;min-height:44px}.card-action:hover{text-decoration:underline}.card-action span{font-size:19px;font-weight:400}.growing-note{margin:30px 0;display:flex;align-items:center;gap:18px;background:#eeefe5;border-radius:10px;padding:22px}.note-icon{font-size:28px;border:1px dashed #9aab95;border-radius:50%;width:45px;height:45px;flex-shrink:0;display:grid;place-items:center}.growing-note h2{font-size:15px;letter-spacing:-.1px;margin:0 0 5px}.growing-note p{font-size:12px;line-height:1.6;color:var(--muted);margin:0;max-width:600px}.note-label{margin-left:auto;font-size:9px;letter-spacing:1.3px;color:#5e705d;line-height:1.8;max-width:140px}.site-footer{display:flex;justify-content:space-between;gap:20px;padding-top:22px;padding-bottom:28px;color:#61715f;font-size:10px;border-top:1px solid var(--border)}.empty-state{text-align:center;padding:48px 16px;border:1px dashed #b7c2b2;border-radius:12px;color:var(--muted)}.empty-state>span{font-size:35px}.empty-state h3{color:var(--ink);margin:10px 0}.empty-state p{font-size:14px}.noscript{padding:20px;background:#fff}.classroom-mode .hero,.classroom-mode .growing-note,.classroom-mode .quiet-link,.classroom-mode .site-footer{display:none}.classroom-mode .library{border:0;padding-top:28px}.classroom-mode .card-art{height:210px}.classroom-mode .card-content h3{font-size:27px}.classroom-mode .card-content p{font-size:17px}.classroom-mode .card-action{font-size:16px}.classroom-mode .card-meta{font-size:12px}.classroom-mode .library-tools{margin-bottom:26px}.classroom-mode .demo-grid{padding-bottom:35px}.classroom-mode .filters button{font-size:16px}.classroom-mode h2{font-size:30px}
@media(min-width:1600px){.classroom-mode main,.classroom-mode .site-header{max-width:1560px}.classroom-mode .card-art{height:270px}.classroom-mode .card-content h3{font-size:34px}.classroom-mode .card-content p{font-size:22px}.classroom-mode .card-action{font-size:21px}.classroom-mode .card-content{padding:28px}}
@media(max-width:900px){.site-header,main,.site-footer{padding-left:26px;padding-right:26px}.site-header nav{gap:16px}.hero{gap:20px;padding:32px 0}.hero h1{font-size:46px}.demo-grid{gap:13px}.card-content{padding:16px}.card-content h3{font-size:19px}.note-label{display:none}.card-art{height:130px}.library-tools{gap:10px}.filters button{padding:10px 12px}.search{min-width:230px}.classroom-mode .demo-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:650px){.site-header,main,.site-footer{padding-left:20px;padding-right:20px}.site-header{min-height:85px;gap:10px}.brand-mark{width:37px;height:37px;font-size:28px;border-radius:10px}.brand{gap:9px}.brand small{font-size:8px;letter-spacing:1px}.brand strong{font-size:20px}.site-header .quiet-link{display:none}.site-header .outline-button{font-size:11px;padding:10px;max-width:138px}.hero{grid-template-columns:1fr;padding-top:30px;padding-bottom:25px;gap:18px}.hero h1{font-size:48px;letter-spacing:-2px}.hero-description{font-size:14px}.hero-art{max-width:355px;justify-self:center;width:100%;display:none}.eyebrow{font-size:9px}.hero-copy .text-link{display:none}.hero-description{margin-bottom:0}.library{padding-top:23px}.section-heading{align-items:center;margin-bottom:17px}h2{font-size:23px}.library-count{max-width:75px;text-align:right;line-height:1.5;font-size:11px}.library-tools{flex-direction:column;gap:12px}.filters{align-self:flex-start}.filters button{padding:10px 14px}.search{width:100%;min-width:0}.demo-grid,.classroom-mode .demo-grid{grid-template-columns:1fr;gap:20px}.card-art{height:165px}.card-content{padding:21px}.card-content h3{font-size:23px}.card-content p{font-size:14px}.card-meta{font-size:11px}.card-action{font-size:14px}.growing-note{align-items:flex-start;padding:19px;gap:13px}.note-icon{width:32px;height:32px;font-size:23px}.growing-note h2{font-size:15px;line-height:1.5}.site-footer{flex-direction:column;gap:9px;font-size:10px}.classroom-mode .card-art{height:180px}.classroom-mode h2{font-size:24px}.classroom-mode .filters button{font-size:14px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}