.number-box{padding:1rem;text-align:center;border:1px solid transparent;border-radius:8px;cursor:pointer;transition:transform .3s ease}.number-box:hover{transform:scale(1.1)}.animate-border{animation:border-pulse 4.5s infinite}@keyframes border-pulse{0%{border-color:#a8a1a1}50%{border-color:#eadff0}to{border-color:#a8a1a1}}