.activity-page{padding:2rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.5rem}.activity-card{background:rgba(255,255,255,.9);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:1px solid #e0e0e0;border-radius:12px;padding:1.25rem;text-align:center;box-shadow:0 4px 12px rgba(0,0,0,.05);transition:transform .2s ease}.activity-card:hover{transform:translateY(-4px)}.activity-card h3{margin-bottom:.5rem;font-size:1.2rem}.activity-card p{font-size:.95rem;color:#555;line-height:1.4}