body{
            display: flex;
            width: 100%;
            height: 100vh;
            align-items: center;
            justify-content: center;
            background-color: #282c34;
            color: white;
        }
        #calculator{
            font-family: Arial, sans-serif;
            max-width: 500px;
            border:  2px solid#61dafb;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
            background-color: #1e1e1e;
        }
        #display{
            width: 100%;
            padding: 20px;
            font-size: 5rem;
            text-align: left;
            border: none;
            background-color: #2c2c2c;
            color: white;
        }
        #keys{
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 10px;
            padding: 25px;
        }
        button{
            width: 100px;
            height: 100px;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            font-size: 3rem;
            font-weight: bold;
            background-color: #61dafb;
            color: #282c34;
            transition: background-color 0.3s ease;
        }
        button:hover{
            background-color: #f05102;
        }
        #equals{
            background-color: #5cb85c;
            color: white;
            
        }
        #equals:hover{
            background-color: #10e410;
        }
        #clear{
            background-color: #d9534f;
            color: white;
        }
        #clear:hover{
            background-color: #ff0800;
        }
        *{
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }