*{
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: Arial, sans-serif;
        }

        body{
            background: #6a5acd;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }

        .calculator{
            background: #ffffff;
            width: 330px;
            padding: 20px;
            border-radius: 15px;
        }

        .display input{
            width: 100%;
            height: 50px;
            font-size: 20px;
            text-align: right;
            padding: 10px;
            border-radius: 10px;
            border: 1px solid #ccc;
            margin-bottom: 15px;
        }

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

        button{
            height: 55px;
            background: #6a5acd;
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            cursor: pointer;
        }

        button span{
            font-size: 10px;
            display: block;
        }

        button:hover{
            background: #483d8b;
        }

        .equal{
            grid-column: span 4;
            background: #28a745;
            font-size: 22px;
        }

        .del{
            background: #dc3545;
        }