.calculator-input{position:relative}.calculator-popup{text-align:center;position:absolute;z-index:100;background:#fff;border:1px solid #ddd;padding:10px;box-shadow:0 2px 10px rgba(0,0,0,.1)}.calculator{width:300px}.calculator .display{padding:10px;background:#f5f5f5;text-align:right;margin-bottom:5px}.calculator .buttons{display:-ms-grid;display:grid;-ms-grid-columns:(1fr)[4];grid-template-columns:repeat(4,1fr);gap:5px}.calculator button{padding:10px}