body{margin:0;background-color:#fff;color:#000;text-align:center;display:flex;flex-direction:column;align-items:center;min-height:100vh}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));max-width:800px;gap:1.5rem;margin:auto;justify-content:center;justify-items:center}@media (min-width: 768px){.card-grid{grid-template-columns:repeat(3,1fr)}}.card-grid:has(.card:nth-child(1):last-child),.card-grid:has(.card:nth-child(2):last-child){grid-template-columns:repeat(auto-fit,minmax(200px,300px));justify-content:center}.card{background-color:#fff;border-radius:5px;padding:1rem;text-align:center}.dark-mode .card{background-color:#000}