@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{--ink:#131d1b;--green:#174a45;--green-hover:#0e3935;--mint:#edf5f0;--peach:#faeee5;--rust:#925333;--purple:#66517c;--line:#dce5e0;--bg:#f7f9f6;--danger:#9a3036;--good:#1e6648;--radius:18px}
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@media(min-width:1200px){.hero{gap:65px}}
@media(max-width:1050px){.header-inner{gap:15px;padding:18px 24px}nav{gap:0}nav a{padding:9px 10px;font-size:13px}.reference-link{display:none}.hero{gap:28px}.hero h1{font-size:44px}.lesson-layout{grid-template-columns:210px 1fr;gap:20px}.lab-layout{grid-template-columns:220px 1fr}}
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@media(max-width:430px){main{padding-left:15px;padding-right:15px}.reference-link{display:none}.hero h1{font-size:36px}.hero .actions .button{width:100%}.hero .intro{font-size:16px}.beat-card{padding:20px 14px}.setup-grid{grid-template-columns:1fr}.setup-grid .full{grid-column:auto}.fact-grid{grid-template-columns:1fr}.quiz-card{padding:19px}.option{font-size:14px;padding:13px}.option.selected{padding:12px}.option .letter{flex-basis:24px;height:24px}.score-hero{flex-direction:column;text-align:center}.score-stats{grid-template-columns:1fr}.stat{display:flex;gap:14px;align-items:center;flex-wrap:wrap}.stat .value{margin:0;order:-1}.mode-choice{grid-template-columns:1fr}.lesson-nav .button{font-size:13px;padding:11px 12px}.measurement .ranges{grid-template-columns:1fr}.step-list{grid-template-columns:repeat(6,1fr)}.quiz-tools{flex-wrap:wrap}.reference-table td,.reference-table th{padding:10px 6px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}.plan-card:hover{transform:none}}
@media(max-width:430px){nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:2px}nav a{padding:8px 3px;text-align:center;white-space:normal;line-height:1.25;min-height:44px;display:grid;place-items:center;min-width:0}}
@media print{.site-header,footer,.no-print,.button,.view-tabs{display:none!important}main{padding:0;max-width:none;background:white}body{background:white;font-size:11px}.page-title h1{font-size:25px}.page-title p{font-size:12px}.reference-grid{gap:12px;grid-template-columns:1fr 1fr}.panel{padding:15px;border-radius:0;break-inside:avoid}.reference-grid .wide{grid-column:1/-1}.reference-table{font-size:11px}.reference-grid .panel h2{font-size:17px}.reference-table td,.reference-table th{padding:7px 5px}.print-only{display:block}.source-list{font-size:10px}a{color:black;text-decoration:none}.notice{background:white;padding:12px;border:1px solid #000;font-size:11px}}