.math-foundation-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:20px 0}.math-foundation-grid article,.math-foundation-feedback,.math-return{border:1px solid #c5d3dd;background:#eef3f7;border-radius:18px;padding:20px}.math-foundation-grid h3{margin-top:0}.math-foundation-feedback{margin:18px 0}.math-foundation-feedback button{margin:5px}.math-variant-levels{display:flex;flex-wrap:wrap;gap:12px}.math-variant-heading{font-weight:700;color:#4d6b83}.math-return{margin-top:18px}.math-upgrade p{line-height:1.8}@media(max-width:420px){.math-foundation-grid{grid-template-columns:1fr}.math-variant-levels{display:grid}.math-return,.math-foundation-feedback{padding:16px}}