@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@500;600;700;800&display=swap');
:root{--forest:#173e38;--dark:#172e2a;--muted:#60716b;--paper:#f7f8f2;--line:#dae1d6;--lime:#e4f1a8;--white:#fff;--orange:#f3d1b8;scroll-behavior:smooth;scroll-padding-top:130px;font-family:'DM Sans',Arial,sans-serif;color:var(--dark);background:var(--paper)}*{box-sizing:border-box}body{margin:0}a{color:inherit}button,input,select{font:inherit}a,button,select,input,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #769631;outline-offset:4px}[hidden]{display:none!important}.skip-link{position:fixed;top:-70px;left:20px;z-index:100;background:var(--forest);color:white;padding:12px}.skip-link:focus{top:10px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.home-nav,.hero,.index-section,.resources{max-width:1240px;margin:auto}.home-nav{display:flex;align-items:center;justify-content:space-between;padding:27px 36px;border-bottom:1px solid 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p{font-size:17px;line-height:1.8;color:var(--muted);max-width:500px}.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin:30px 0 36px}.primary-button{display:flex;gap:34px;padding:16px 23px;background:var(--forest);color:white;border-radius:7px;text-decoration:none;font-weight:600}.resume-button{font-size:14px;font-weight:600;text-decoration:none}.course-stats{display:flex;gap:32px}.course-stats span{font-size:12px;color:var(--muted);border-right:1px solid var(--line);padding-right:30px}.course-stats span:last-child{border:0}.course-stats b{display:block;font-size:22px;color:var(--forest);font-family:Manrope;margin-bottom:3px}.math-art{background:var(--lime);border-radius:24px;min-height:374px;padding:35px 40px;position:relative;transform:rotate(2deg);overflow:hidden;background-image:linear-gradient(#173e3809 1px,transparent 1px),linear-gradient(90deg,#173e3809 1px,transparent 1px);background-size:24px 24px}.art-label{font-size:10px;letter-spacing:3px}.art-equation{font-family:Manrope;font-size:39px;line-height:1.4;font-weight:600;margin:33px 0}.art-equation>span{font-weight:400;margin-right:12px}.art-rule{height:2px;background:var(--forest);margin:10px 0;width:90%;transform:rotate(-2deg)}.art-equation strong{font-size:46px}.art-note{font-size:11px;letter-spacing:2px}.art-star{font-size:80px;position:absolute;right:15px;top:72px;color:#78943a;transform:rotate(-9deg)}.index-section{padding:45px 36px 60px;border-top:1px solid var(--line)}h2{font-size:32px;letter-spacing:-1px;margin:10px 0 15px}.index-heading{display:flex;align-items:end;justify-content:space-between;gap:20px}.index-heading>p{font-size:13px;color:var(--muted)}.filters{display:grid;grid-template-columns:1.5fr 1fr;gap:20px;margin:26px 0 14px}.filters label{font-size:12px;font-weight:600}.filters input,.filters select{display:block;width:100%;margin-top:9px;border:1px solid var(--line);background:white;color:var(--dark);border-radius:7px;padding:13px}.search-status{font-size:12px;color:var(--muted)}.unit-block{margin:40px 0;scroll-margin-top:25px}.unit-heading{display:flex;gap:14px;align-items:center;margin-bottom:18px}.unit-heading>span{height:42px;width:42px;display:grid;place-items:center;background:var(--lime);border-radius:50%;font-weight:700;font-size:14px}.unit-heading h3{font-size:19px;letter-spacing:-.4px;margin:0}.unit-heading p{font-size:12px;color:var(--muted);margin:5px 0 0}.lesson-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.lesson-card{min-height:128px;border:1px solid var(--line);border-radius:9px;padding:18px 20px;text-decoration:none;background:white;position:relative;transition:border-color .15s,transform .15s;scroll-margin-top:30px}.lesson-card:hover{border-color:#799c5c;transform:translateY(-2px)}.lesson-card:target{outline:3px solid 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span{display:block;font-size:12px;font-weight:400;color:var(--muted);margin-top:8px}.source-note{font-size:12px;color:var(--muted);line-height:1.7;max-width:850px;margin-top:30px}.site-footer{border-top:1px solid var(--line);padding:24px 36px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:12px;color:var(--muted)}.lesson-nav{position:sticky;top:0;z-index:20;background:#f7f8f2f5;backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.nav-inner{max-width:1120px;padding:15px 30px;margin:auto;display:grid;grid-template-columns:180px 1fr 180px;align-items:center;gap:20px}.day-arrow{display:flex;align-items:center;gap:14px;text-decoration:none;font-size:14px;font-weight:600}.day-arrow>span:first-child,.next>span:last-child{font-size:24px}.day-arrow.previous>span:last-child,.day-arrow.next>span:first-child{font-size:14px}.day-arrow 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20px}.day-label{display:block;font-size:14px;letter-spacing:2px;color:var(--muted);margin-bottom:12px}.lesson-tools{display:flex;gap:19px;flex-wrap:wrap;align-items:center;border-bottom:1px solid var(--line);padding-bottom:20px;font-size:12px}.lesson-tools a{text-decoration:none;font-weight:600}.lesson-tools button{border:1px solid var(--line);background:white;border-radius:5px;padding:7px 12px;font-size:11px;cursor:pointer;margin-left:auto}.standards{display:flex;gap:6px;align-items:center;flex-wrap:wrap;font-size:10px;margin:22px 0}.standards b{margin-right:7px}.standards span{background:#e8ede2;border-radius:3px;padding:5px 7px}.target{border-left:4px solid #89a74a;background:#eef3df;padding:18px 22px;border-radius:0 8px 8px 0}.target>span{font-size:9px;letter-spacing:2px;font-weight:700}.target p{font-size:16px;line-height:1.6;margin:7px 0 0}.lesson-shell section{margin-top:46px;scroll-margin-top:125px}.lesson-shell 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p{font-size:16px;line-height:1.8;margin:0}.work-space{grid-column:2;min-height:22px}.question-tag{font-size:9px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);display:inline-block;margin-bottom:7px}.assessment-info{display:flex;gap:20px;font-size:12px;background:#eaf0e3;padding:14px;border-radius:6px}.answers{background:white;border:1px solid var(--line);border-radius:9px;padding:20px}.answers summary{cursor:pointer;font-weight:600}.answers ol{padding-left:24px;line-height:1.7}.answers li{padding:13px 0}.answers li p{font-size:14px;margin:5px 0 0;color:var(--muted)}.bottom-nav{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);margin-top:45px;padding-top:25px;font-size:12px;font-weight:600}.bottom-nav a{text-decoration:none}.answer-section{print-color-adjust:exact}
@media(max-width:760px){.hero{padding-top:45px;gap:30px;grid-template-columns:1fr}.hero h1{font-size:47px}.math-art{max-width:500px;min-height:320px}.lesson-grid{grid-template-columns:repeat(2,1fr)}.index-heading{display:block}.resources{border-radius:0}.home-nav{padding:20px}.home-nav nav{gap:16px;font-size:12px}.brand{font-size:18px}.brand-mark{width:40px;height:40px}.hero,.index-section,.resources{padding-left:22px;padding-right:22px}.nav-inner{padding:12px 16px;grid-template-columns:88px 1fr 88px;gap:10px}.day-arrow{gap:6px}.day-arrow small{font-size:9px}.nav-center select{width:220px}.mini-brand span{display:none}.lesson-shell{padding:30px 22px 45px}.lesson-shell h1{font-size:32px}.lesson-kicker{font-size:9px;gap:8px}.lesson-tools{gap:12px}.course-stats{gap:20px}.course-stats span{padding-right:20px}}
@media(max-width:440px){.home-nav nav a:first-child{display:none}.brand small{font-size:8px;letter-spacing:1px}.lesson-grid,.filters,.resource-grid{grid-template-columns:1fr}.hero h1{font-size:41px}.math-art{padding:28px;min-height:320px}.art-equation{font-size:32px}.art-equation strong{font-size:40px}.nav-inner{grid-template-columns:75px 1fr 75px;gap:6px}.nav-center select{width:160px;font-size:10px}.day-arrow small{display:none}.day-arrow.previous>span:last-child,.day-arrow.next>span:first-child{font-size:11px}.mini-brand{font-size:13px}.lesson-tools button{margin-left:0}.bottom-nav{font-size:10px}.lesson-card{min-height:105px}.lesson-shell h1{font-size:29px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*{transition:none!important}.lesson-card:hover{transform:none}}
@media print{body{background:white}.lesson-nav,.site-footer,.skip-link,.lesson-tools,.bottom-nav,.answer-section{display:none!important}.lesson-shell{max-width:none;padding:0}.lesson-shell h1{font-size:25px}.lesson-shell section{margin-top:25px}.example,.target{break-inside:avoid}.work-space{min-height:55px}.problems>li{padding:14px 0}.standards span{background:none}.target{background:none}}