@import "https://fonts.googleapis.com/css2?family=Nunito:wght@700;800;900&display=swap";:root{--matsu-bg:oklch(91% .048 83.6);--matsu-fg:oklch(41% .077 78.9);--matsu-card:oklch(92% .042 83.6);--matsu-primary:oklch(71% .097 111.7);--matsu-primary-dk:oklch(59% .096 111.8);--matsu-secondary:oklch(88% .055 83.6);--matsu-muted:oklch(86% .064 83.7);--matsu-border:oklch(74% .063 80.8);--matsu-red:oklch(63% .24 29.2);--matsu-orange:oklch(66% .19 41.6);--matsu-lime:oklch(85% .19 85.4);--matsu-amber:oklch(74% .19 66.3);--matsu-sidebar:oklch(87% .059 83.7);--grass:var(--matsu-primary);--grass-light:var(--matsu-lime);--earth:var(--matsu-border);--wood:var(--matsu-fg);--white:var(--matsu-card);--ink:var(--matsu-fg);--accent:var(--matsu-orange);--accent2:var(--matsu-red)}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--matsu-bg);min-height:100vh;font-family:Nunito,PingFang SC,Hiragino Sans 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#fff9;margin-bottom:12px;font-size:clamp(2rem,5vw,3.5rem)}.subtitle{color:var(--grass);font-size:1.2rem;font-style:italic}#lesson-list{z-index:1;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;width:100%;max-width:1100px;display:grid;position:relative}.lesson-card{background:var(--matsu-card);color:var(--matsu-fg);border:2px solid var(--matsu-border);box-shadow:0 2px 0 0 var(--matsu-border), 0 4px 16px oklch(0% 0 0/.1);border-radius:16px;flex-direction:column;gap:10px;padding:28px 24px;text-decoration:none;transition:transform .2s,box-shadow .2s,border-color .2s;display:flex}.lesson-card:hover{box-shadow:0 2px 0 0 var(--matsu-primary-dk), 0 8px 28px oklch(0% 0 0/.16);border-color:var(--matsu-primary);transform:translateY(-4px)}.lesson-card .icon{font-size:2.5rem}.lesson-card h2{color:var(--wood);font-size:1.25rem}.lesson-card p{color:#5a5040;font-size:.9rem;line-height:1.6}.lesson-card .tags{flex-wrap:wrap;gap:6px;margin-top:6px;display:flex}.lesson-card 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var(--matsu-border);background:#fff9;border-radius:14px;flex-wrap:wrap;gap:8px;margin-bottom:36px;padding:14px 18px;display:flex}.domain-jump a{color:var(--matsu-primary-dk);background:var(--matsu-secondary);border:1.5px solid var(--matsu-border);border-radius:8px;padding:6px 12px;font-size:.88rem;font-weight:800;text-decoration:none;transition:background .15s,color .15s,transform .15s}.domain-jump a:hover{background:var(--matsu-primary);color:#fff;transform:translateY(-2px)}.domain-section{margin-bottom:56px;scroll-margin-top:24px}.domain-title{color:var(--matsu-fg);border-bottom:2.5px dashed var(--matsu-border);align-items:baseline;gap:12px;margin-bottom:20px;padding-bottom:10px;font-size:1.5rem;display:flex}.domain-count{color:var(--matsu-primary-dk);background:var(--matsu-lime);border:1.5px solid var(--matsu-primary);border-radius:14px;padding:2px 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