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.system-nav{position:fixed;inset:0 auto 0 0;width:240px;background:#102038;padding:20px;overflow:auto;border-right:1px solid #304661}.system-nav nav{display:flex;flex-direction:column;gap:8px}.system-nav a{padding:12px;border-radius:8px;text-decoration:none;color:#edf4ff}.system-nav a[aria-current=page]{background:#2b5279}.system-nav h2{font-size:22px}.system-nav p{font-size:13px}#menu-toggle{display:none}main{margin-left:240px;max-width:1200px}.home-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.home-cards>a{display:block;padding:20px;background:#172b47;border:1px solid #304661;border-radius:12px;text-decoration:none}.home-cards h2{font-size:21px}.home-cards p{margin-bottom:0}[data-page]>.lesson:first-child{margin-top:0}@media(max-width:800px){.system-nav{position:sticky;top:0;width:100%;height:auto;z-index:3;padding:10px 16px}.system-nav h2{display:inline-block;margin:0 16px 0 0}.system-nav p{display:none}#menu-toggle{display:inline-block}.system-nav nav{display:none;margin-top:12px}.system-nav nav.open{display:flex}main{margin-left:0}.home-cards{grid-template-columns:1fr}}
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