*{box-sizing:border-box}body{margin:0;background:#f3f6fa;color:#172a43;font:16px/1.6 system-ui,sans-serif}a{color:inherit}button,a.button{font:inherit;cursor:pointer}.wrap{max-width:1180px;margin:auto;padding:0 30px}header{background:#102b4b;color:white;padding:23px 0}header .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{text-decoration:none;font-weight:750;letter-spacing:-.5px;font-size:22px}.overline{font-size:12px;font-weight:750;letter-spacing:1.6px;text-transform:uppercase}.intro{padding:43px 0 24px}h1{font-size:46px;line-height:1.12;letter-spacing:-1.8px;margin:12px 0 16px}h2{font-size:29px;line-height:1.25;letter-spacing:-.7px}h3{font-size:21px;line-height:1.3}p{margin:8px 0 16px}.muted{color:#536579}.intro p{max-width:700px;font-size:18px}.tabs{display:flex;gap:10px;margin:24px 0 30px}.tab{border:1px solid #b9c7d8;background:white;padding:12px 23px;border-radius:7px;font-weight:700}.tab[aria-selected=true]{background:#173d68;color:white;border-color:#173d68}.grade-top{display:flex;justify-content:space-between;gap:24px;align-items:center;padding:26px 30px;background:#e1eaf5;border-left:5px solid #265c95;border-radius:4px}.grade-top h2{margin:4px 0 8px}.grade-top p{margin:0;max-width:650px}.button{display:inline-block;text-decoration:none;background:#173d68;color:white;border:1px solid #173d68;padding:10px 17px;border-radius:5px;font-weight:650;white-space:nowrap}.secondary{color:#173d68;background:white;border-color:#b5c6da}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:24px 0 32px}.card{background:white;border:1px solid #d6dfe9;border-radius:9px;padding:25px;display:flex;flex-direction:column}.card .number{font-size:14px;font-weight:750;color:#315d8a}.card h3{margin:14px 0 10px}.card p{color:#526177;flex:1}.card .button{align-self:flex-start}.card small{font-size:14px;color:#5c6d80;margin:16px 0}.lesson-links{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:14px}.note{border-top:1px solid #ced9e5;padding:24px 0 36px;display:grid;grid-template-columns:1fr 1fr;gap:45px}.note h3{font-size:17px}.note p{font-size:15px;color:#526177}footer{border-top:1px solid #d3dde8;padding:23px 0;font-size:14px}.toolbar{max-width:860px;margin:25px auto;display:flex;flex-wrap:wrap;gap:12px;align-items:center;padding:0 20px}.paper{background:white;max-width:816px;margin:24px auto;padding:45px 55px;box-shadow:0 4px 22px #172a4310;min-height:1000px}.paper h1{font-size:31px;letter-spacing:-.7px}.paper h2{font-size:20px;margin-top:25px}.paper .identity{display:flex;justify-content:space-between;gap:20px;margin:25px 0}.question{margin:25px 0;break-inside:avoid}.lines{height:94px;background:repeating-linear-gradient(to bottom,transparent 0,transparent 30px,#b5bfca 31px,transparent 32px)}.draw{border:1px solid #aab9cb;height:195px;border-radius:4px}.choices{padding:20px 12px;border:1px solid #c5cdd6;font-weight:650;line-height:2}.paper li{margin:8px 0}.paper-footer{margin-top:28px;padding-top:10px;border-top:1px solid #d1d7de;font-size:12px;color:#566273}.draft{background:#fff5d6;color:#5b4713;border:1px solid #edd991;border-radius:4px;padding:11px 16px;font-size:14px}.pack-title{max-width:816px;margin:30px auto;padding:0 20px}@media(max-width:760px){.wrap{padding:0 20px}h1{font-size:36px}.grid,.note{grid-template-columns:1fr}.tabs{gap:6px}.tab{padding:10px 12px;font-size:15px}.grade-top{display:block;padding:22px}.grade-top .button{margin-top:20px}header .overline{display:none}.paper{padding:25px 22px;min-height:0}.paper .identity{display:block}.intro{padding-top:28px}.note{gap:10px}}@page{size:letter;margin:.55in}@media print{body{background:white;color:black;font-size:11pt;line-height:1.4}header,footer,.toolbar,.pack-title{display:none!important}.paper{width:auto;max-width:none;margin:0;padding:0;box-shadow:none;min-height:0;break-after:page}.paper:last-child{break-after:auto}.paper h1{font-size:23pt}.paper h2{font-size:15pt}.paper .overline{font-size:9pt}.paper-footer{font-size:9pt}.question{margin:19px 0}.draw{height:170px}.lines{height:90px}.student-large{font-size:13pt}.draft{background:white;border:1px solid #999;font-size:9pt}.paper p,.paper li{orphans:3;widows:3}}
.book-paper{max-width:816px;margin:24px auto;background:white}.book-paper img{display:block;width:100%;height:auto}@media print{.book-paper{margin:0;max-width:none;break-after:page;height:9.8in;display:flex;align-items:center;justify-content:center}.book-paper:last-child{break-after:auto}.book-paper img{width:auto;height:auto;max-width:100%;max-height:9.75in;object-fit:contain}}
.unit-nav{display:flex;flex-wrap:wrap;gap:12px;padding:24px 0}.unit-nav a{border:1px solid #bacbdd;border-radius:5px;background:white;padding:9px 12px;font-size:14px}.unit-section{scroll-margin-top:20px}.unit-heading{border-bottom:2px solid #c8d7e8;padding:15px 0;display:flex;gap:20px;justify-content:space-between;align-items:center}.unit-heading h2{margin:7px 0}.course-table{border-collapse:collapse;width:100%;font-size:15px}.course-table td,.course-table th{border:1px solid #bac8d8;padding:10px;text-align:left}.teaching-steps p{margin:4px 0 12px}.source-note{font-size:14px;color:#4d6077}@media(max-width:760px){.unit-heading{display:block}.unit-heading .lesson-links{margin-top:15px}}@media print{.teacher-paper{font-size:10.5pt;line-height:1.35}.teacher-paper h1{font-size:21pt}.teacher-paper h2{font-size:14pt}.teacher-paper .source-note{font-size:9pt}.teacher-paper p{margin:5px 0 9px}.teacher-paper li{margin:5px 0}.teacher-paper .paper-footer{margin-top:14px}.course-table{font-size:10pt}tr{break-inside:avoid}}
@media print{.sixth-student{font-size:11pt;line-height:1.35}.sixth-student h1{font-size:22pt}.sixth-student .question{margin:18px 0}.sixth-student .source-note{font-size:9pt}.sixth-student .lines{height:86px}}
@media print{.high-student{font-size:11pt;line-height:1.35}.high-student h1{font-size:22pt}.high-student .question{margin:18px 0}.high-student .source-note{font-size:9pt}.high-student .lines{height:84px}}
header{background:#fff;color:#102b4b;border-bottom:3px solid #173d68;padding:14px 0}.brand-with-logo{display:flex;align-items:center;gap:20px;line-height:1.3}.foundation-logo{display:block;flex:none;width:88px;height:88px;object-fit:contain}.brand-subtitle{display:block;font-size:14px;font-weight:500;letter-spacing:0;color:#536579;margin-top:6px}.grade-with-art{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,390px);gap:18px 32px;align-items:center}.grade-with-art>.button{grid-column:1;justify-self:start;align-self:start}.grade-art{grid-column:2;grid-row:1 / span 2;margin:0;min-width:0;background:#fff;border-radius:8px;overflow:hidden;border:1px solid #c0d0e1}.grade-art img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover}.grade-art figcaption{padding:8px 12px;font-size:12px;line-height:1.4;color:#475b73}.quackers-art img{object-fit:contain;max-height:260px;aspect-ratio:3/2}.grade-with-art h2{font-size:28px}@media(max-width:760px){.foundation-logo{width:66px;height:66px}.brand-with-logo{gap:13px;font-size:19px}.brand-subtitle{font-size:12px}.grade-with-art{grid-template-columns:1fr;gap:16px}.grade-art{grid-column:1;grid-row:auto;max-width:450px;width:100%}.grade-with-art>.button{grid-row:2;margin:0}.grade-with-art h2{font-size:25px}.intro{padding-top:25px}}@media print{.grade-art{display:none!important}}
/* Teacher quick start and curriculum navigation */
[hidden]{display:none!important}.overline{font-size:14px}.intro{max-width:900px;padding:30px 0 22px}.intro h1{font-size:42px;max-width:800px}.hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}.hero-actions span{font-weight:700;color:#315d8a}.quick-start{background:#102b4b;color:white;border-radius:12px;padding:22px 26px}.quick-start h2{margin:0 0 18px;font-size:25px}.quick-start ol{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;list-style:none;padding:0;margin:0}.quick-start li{display:flex;gap:12px}.quick-start li>span{display:grid;place-items:center;flex:none;width:30px;height:30px;border-radius:50%;background:#ffd466;color:#102b4b;font-weight:800}.quick-start p{font-size:14px;line-height:1.5;margin:5px 0 0;color:#d9e6f5}.overview{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin:26px 0}.overview section,.overview aside{background:white;border:1px solid #d6dfe9;border-radius:10px;padding:20px 25px}.overview h2{font-size:23px;margin:0 0 10px}.overview ul{padding-left:21px;margin-bottom:0}.overview li{margin:5px 0}.overview .source-note{margin-top:12px;font-size:14px}.tabs{margin:15px 0 20px}#grade-picker{scroll-margin-top:20px}.download-heading h2{font-size:24px;margin-bottom:5px}.download-heading p{color:#536579}.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.download-card{display:flex;flex-direction:column;gap:8px;text-decoration:none;border:2px solid #bccdde;border-radius:10px;padding:22px;background:white}.download-card>span{font-size:27px;color:#315d8a}.download-card strong{font-size:18px;line-height:1.4}.download-card small{font-size:14px}.download-card:hover{border-color:#265c95;background:#eaf2fb}.download-card.bundle{background:#173d68;color:white;border-color:#173d68}.download-card.bundle>span{color:#ffd466}.download-card.bundle:hover{background:#102b4b}.first-lesson{display:flex;gap:14px;flex-wrap:wrap;padding:17px 0 25px}.first-lesson a{color:#174d80;font-weight:600}.lesson-tools{display:flex;align-items:end;gap:12px;flex-wrap:wrap;background:#e1eaf5;padding:18px;border-radius:9px}.lesson-tools label{font-size:14px;font-weight:700;flex:1;min-width:135px}.lesson-tools label:first-child{flex:2;min-width:200px}.lesson-tools input,.lesson-tools select{display:block;width:100%;font:inherit;font-size:16px;font-weight:400;padding:10px;margin-top:5px;border:1px solid #a8bdd1;border-radius:5px;background:white;color:#172a43}.results-bar{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:16px 0}.results-bar p{margin:0;color:#536579}.results-bar button{font-size:14px}.grade-with-art{margin-bottom:24px;padding:20px;grid-template-columns:minmax(0,1fr) 200px}.grade-art img{max-height:145px}.grade-art figcaption{font-size:14px}.grade-with-art h2{font-size:25px}.unit-section{background:white;border:1px solid #c8d7e8;border-radius:10px;margin:14px 0;overflow:hidden;border-left:6px solid var(--unit-color,#265c95)}.unit-1{--unit-color:#265c95}.unit-2{--unit-color:#13786b}.unit-3{--unit-color:#7451a0}.unit-4{--unit-color:#b34372}.unit-5{--unit-color:#a95b19}.unit-6{--unit-color:#347139}.unit-section summary{display:flex;align-items:center;gap:16px;padding:19px;cursor:pointer;list-style:none}.unit-section summary::-webkit-details-marker{display:none}.unit-section summary:after{content:'+';font-size:27px;margin-left:6px}.unit-section[open] summary:after{content:'−'}.unit-section summary strong{display:block;font-size:20px;line-height:1.35;margin-top:4px}.unit-icon{display:grid;place-items:center;border-radius:9px;background:#eef3f8;color:var(--unit-color);font-size:29px;min-width:48px;height:48px}.unit-count{margin-left:auto;white-space:nowrap;font-size:14px;color:#536579}.unit-content{padding:0 20px 8px}.unit-content>.lesson-links{border-top:1px solid #d6dfe9;padding-top:15px}.unit-content .grid{margin:18px 0}.unit-content .card{padding:18px;background:#f8fafc}.button{white-space:normal}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #c7790b;outline-offset:4px}#no-results{padding:20px;background:#fff5d6;border-radius:6px}@media(max-width:900px){.quick-start ol{grid-template-columns:1fr 1fr}.download-grid{grid-template-columns:1fr}.overview{gap:16px}.unit-content .grid{grid-template-columns:1fr 1fr}}@media(max-width:600px){.intro h1{font-size:33px}.overview,.quick-start ol{grid-template-columns:1fr}.quick-start{padding:20px}.tabs{flex-wrap:wrap}.grade-with-art{grid-template-columns:1fr}.grade-art{display:none}.unit-content .grid{grid-template-columns:1fr}.unit-section summary{gap:10px;padding:15px}.unit-section summary strong{font-size:18px}.unit-count{display:none}.unit-section summary:after{margin-left:auto}.unit-icon{min-width:36px;height:40px}.results-bar{align-items:flex-start}.brand-subtitle{font-size:14px}}
.classroom-video{margin:18px 0 22px;padding:20px;border:1px solid #bfd1e3;border-radius:10px;background:#eef5fc}.classroom-video h3{margin:0 0 9px}.classroom-video video{display:block;width:100%;max-width:850px;aspect-ratio:16/9;background:#102b4b;border-radius:6px;margin:16px 0}.classroom-video p{max-width:850px}.video-downloads{padding:18px 22px;margin:0 0 25px;background:#fff5d6;border:1px solid #ead089;border-radius:9px}.video-downloads h3{margin:0 0 7px}@media print{.classroom-video video,.video-downloads{display:none}}

.site-links{display:flex;flex-wrap:wrap;gap:18px;padding-top:18px;padding-bottom:6px;font-size:15px}.teacher-signup{margin:32px 0;padding:26px;background:white;border:1px solid #bccdde;border-radius:12px}.teacher-signup fieldset{border:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.teacher-signup label{display:flex;flex-direction:column;gap:5px}.teacher-signup input,.teacher-signup select{font:inherit;padding:10px;border:1px solid #aebed0;border-radius:5px;max-width:100%;width:100%}.teacher-signup .signup-consent{grid-column:1/-1;flex-direction:row;align-items:flex-start}.signup-consent input{width:auto;margin-top:7px}.video-actions{margin:12px 0}.classroom-video video{object-fit:contain}.button{white-space:normal}button:disabled{opacity:.65;cursor:wait}@media(max-width:600px){.teacher-signup fieldset{grid-template-columns:1fr}.teacher-signup{padding:18px}}@media print{.teacher-signup,.video-actions{display:none}}