@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--bg:#f7f8f4;--paper:#fff;--ink:#213c37;--muted:#6c7974;--green:#246753;--light:#e7f0e8;--border:#e0e6de;--peach:#f5e2d1;--purple:#8171ad;--shadow:0 5px 22px #273c3305}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:'DM Sans',system-ui,sans-serif;font-size:15px;line-height:1.6}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}a{color:var(--green)}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}a,button,input,select{outline-offset:5px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #bd7938}h1,h2,h3,h4{font-family:Manrope,system-ui,sans-serif;line-height:1.25;margin:0 0 14px}h1{font-size:clamp(30px,3vw,43px);letter-spacing:-1.7px;font-weight:800}h2{font-size:23px;letter-spacing:-.65px}h3{font-size:18px;letter-spacing:-.35px}p{margin:0 0 16px}strong{font-weight:700}.muted{color:var(--muted)}.small{font-size:13px}.eyebrow{font-size:10px;letter-spacing:1.8px;font-weight:700;color:var(--muted);margin:0 0 17px}.shell{display:flex;min-height:100vh}.sidebar{width:235px;flex-shrink:0;background:#fff;border-right:1px solid var(--border);padding:28px 22px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;text-decoration:none;color:var(--ink);font-size:29px;font-weight:800;letter-spacing:-1px;margin-bottom:44px}.brandmark{display:inline-flex;position:relative;justify-content:center;align-items:center;width:36px;height:39px;background:var(--ink);border-radius:11px;color:#fff;font-size:28px;margin-right:11px;line-height:1}.brandmark span{position:absolute;font-size:14px;right:-5px;top:-5px;color:#dca16f}.branddot{color:#c99364}nav{display:grid;gap:6px}nav a{display:flex;gap:12px;align-items:center;text-decoration:none;padding:10px 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strong{font-size:32px;display:block}.stat-grid p{margin:0}.skill-row{display:grid;grid-template-columns:1fr 140px 130px;gap:20px;align-items:center;padding:18px 0;border-bottom:1px solid var(--border);font-size:13px}.bar{height:7px;background:#edf1e8;border-radius:9px;overflow:hidden}.bar span{height:100%;display:block;background:#81a98d}.empty{text-align:center;padding:34px}.resource{display:block;text-decoration:none;margin:14px 0;border-bottom:1px solid var(--border);padding-bottom:14px}.resource p{margin:5px 0 0}.pill{background:#f2f4ed;border-radius:20px;padding:5px 10px;font-size:11px;white-space:nowrap}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:11px 20px;background:var(--ink);color:#fff;border-radius:8px;font-size:13px;display:none;z-index:5}.skip{position:fixed;left:12px;top:-60px;background:#fff;padding:12px;z-index:10}.skip:focus{top:12px}dialog{border:1px solid var(--border);border-radius:14px;max-width:450px;padding:27px;color:var(--ink)}dialog::backdrop{background:#173c3760}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(min-width:1500px){main{padding-top:50px}.hero{min-height:310px}.hero-copy{padding:38px}.grid3 .card{padding:28px}}
@media(max-width:1100px){.sidebar{width:205px;padding:25px 15px}main{padding:28px 25px}.topbar{padding:0 25px}.lab-layout{grid-template-columns:220px 1fr}.graphs{grid-template-columns:1fr}.graph svg{max-height:170px}.graph{display:grid;grid-template-columns:1fr 2fr;align-items:center}.graph p{grid-column:1/-1}.hero h2{font-size:27px}.lesson-layout{grid-template-columns:190px 1fr}}
@media(max-width:760px){.shell{display:block}.sidebar{position:static;width:100%;height:auto;padding:15px 18px;border-right:0;border-bottom:1px solid var(--border)}.brand{font-size:23px;margin:0 0 13px}.brandmark{height:30px;width:28px;font-size:23px}.sidebar>.eyebrow,.subject-list,.sidebar-bottom{display:none}nav{display:flex;overflow-x:auto;gap:4px}nav a{padding:7px 10px;white-space:nowrap;font-size:15px}nav a span{font-size:11px}.topbar{height:53px;padding:0 19px;font-size:11px}.save-status{font-size:9px}.crumb{margin:0 5px}main{padding:25px 18px}.page-intro{align-items:flex-start}.page-intro>.badge{display:none}h1{font-size:32px}.hero{grid-template-columns:1fr}.hero-copy{padding:24px}.hero-art{display:none}.hero h2{max-width:none}.grid3,.grid2,.lab-layout,.lesson-layout{grid-template-columns:1fr}.grid3{gap:12px}.grid3 .card{display:grid;grid-template-columns:44px 1fr;gap:0 15px;padding:18px}.grid3 .card-icon{grid-row:1/4;margin:0}.grid3 .card-bottom{grid-column:2;margin-top:5px}.grid3 .card p{margin-bottom:8px}.controls{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}.controls h3,.controls>.small,.controls>.note{grid-column:1/-1}.controls label{margin-top:12px}.graphs{grid-template-columns:1fr}.graph{display:block}.graph svg{max-height:220px}.metrics .metric{padding:8px}.metric strong{font-size:17px}.lesson-tabs{display:flex;overflow:auto;margin-bottom:0}.lesson-tabs button{min-width:155px;font-size:12px}.stat-grid{gap:9px}.stat-grid .card{padding:15px}.stat-grid strong{font-size:27px}.stat-grid p{font-size:11px}.skill-row{grid-template-columns:1fr 90px;gap:12px}.skill-row .bar{grid-column:1/-1;grid-row:auto}.skill-row>a{text-align:right}footer{padding:0 18px 23px;flex-direction:column;gap:4px}.question{font-size:19px}.quiz-actions{flex-wrap:wrap}}
.unit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.unit-card{display:block;text-decoration:none;color:var(--ink);transition:border-color .15s,transform .15s}.unit-card:hover{border-color:#8aac92;transform:translateY(-2px)}.unit-card .card-icon{margin-bottom:12px}.unit-card .eyebrow{margin:0 0 12px}.unit-card p{min-height:42px}.unit-card .card-bottom{color:var(--muted)}.unit-card .card-bottom strong{color:var(--green)}.unit-switch{display:flex;gap:8px;overflow-x:auto;margin-bottom:24px;padding:3px 3px 10px}.unit-switch a{white-space:nowrap;text-decoration:none;font-size:12px;border:1px solid var(--border);border-radius:20px;padding:7px 13px;background:#fff}.unit-switch a[aria-current=page]{background:var(--green);color:#fff}.search-field,textarea{width:100%;padding:14px;border:1px solid var(--border);border-radius:9px;background:#fff;color:var(--ink);font:inherit}.search-field{margin-bottom:8px}textarea{margin-top:10px;resize:vertical;line-height:1.7}.rubric{display:grid;gap:12px}.rubric label{display:flex;gap:10px;align-items:flex-start;font-size:14px}.rubric input{margin-top:6px;accent-color:var(--green);width:17px;height:17px;flex-shrink:0}.experiment-number{font-size:48px;font-weight:800;letter-spacing:-2px}.experiment-number span{font-size:20px;letter-spacing:0;color:var(--muted)}.experiment-svg{display:block;width:100%;background:#f4f7ef;border-radius:10px;margin-top:18px}.controls>div>output{font-size:13px;color:var(--green)}.formula{overflow-wrap:anywhere;font-size:19px}.lesson-tabs{max-height:75vh;overflow-y:auto}.path-row .step-num{padding:4px;min-width:44px}.unit-grid .card p{font-size:14px}@media(min-width:1450px){.unit-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(max-width:760px){.unit-grid{grid-template-columns:1fr}.unit-card p{min-height:0}.unit-switch{margin-bottom:18px}.experiment-number{font-size:39px}.formula{font-size:16px}.unit-card{padding:20px}.lesson-tabs{max-height:none}.rubric label{font-size:13px}.path-row{gap:10px}.path-row .text-link{font-size:11px}.unit-grid .card p{font-size:13px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
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@media(max-width:760px){.subject-grid,.reading-layout,.planner-controls{grid-template-columns:1fr}.today-strip{display:block;padding:22px}.today-strip .flex{margin-top:20px}.subject-list{display:flex!important;overflow-x:auto;gap:8px;padding:8px 0;max-width:100%}.subject-list p{display:none}.subject-list a{white-space:nowrap;border:1px solid var(--border);padding:9px 12px;background:#fff}.subject-card{padding:22px}.reading p{font-size:16px}.path-row{flex-wrap:wrap}.flash-word{font-size:28px}.topbar{gap:8px;flex-wrap:wrap}.topbar>span{font-size:13px}.stat-grid p,.unit-grid .card p,.rubric label{font-size:14px}.sidebar nav{overflow-x:auto}.sidebar nav a{white-space:nowrap;min-width:max-content}.reading-layout aside{margin-top:0}.page-intro h1{font-size:32px}.path-row .text-link{font-size:14px}th,td{padding:8px;font-size:14px}}