body {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-color: #f0f0f0;
            margin: 0;
            font-family: Arial, sans-serif;
            padding:30px;
        }

        .calculator {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
        }

        .display {
            width: 100%;
            height: 50px;
            border: none;
            background-color: #f0f0f0;
            border-radius: 5px;
            margin-bottom: 20px;
            font-size: 24px;
            text-align: right;
            padding: 5px;
            box-shadow: inset 0px 2px 5px rgba(0, 0, 0, 0.1);
        }
  
         

        .buttons {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 10px;
        }

        .button {
            background-color: white;
            border: none;
            border-radius: 50%;
            height: 60px;
            font-size: 18px;
            box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);
            transition: all 0.2s;
        }

        .button:active {
            transform: translateY(2px);
            box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
        }

        .button.zero {
            grid-column: span 2;
        }

        .button.equal {
            background-color: white;
            color: red;
            grid-column: span 2;
        }
         h1{
           font-size:1px;
           margin-top:6px;
           margin-botton: 20px;
           
         }