:root{--ink:#132a32;--muted:#66777c;--line:#dfe8e8;--soft:#f3f8f7;--teal:#12b5b0;--navy:#102d3b;--white:#fff;--danger:#c23b45;--shadow:0 18px 55px rgba(16,45,59,.09)}
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@media(max-width:900px){.shell{grid-template-columns:1fr}.sidebar{height:auto;position:relative}.sidebar-foot{position:static;margin-top:20px}.main{padding:22px}.stats,.classic-grid{grid-template-columns:1fr 1fr}.course{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.form-grid .wide{grid-column:auto}}
@media(max-width:560px){.stats,.classic-grid{grid-template-columns:1fr}.table-wrap{overflow-x:auto}.portal-head{align-items:flex-start;gap:15px}.portal-hero{padding-top:38px}}