styles.css

        body {
            font-family: Arial,'Times New Roman', Times, serif;
            margin: 0;
            padding: 0;
            background-color: #f4f4f4;
            color: #333;
            text-align: center;
        }
        .container {
            max-width: 530px;
            margin: 20px auto;
            padding: 20px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.1);
        }
        .container1 {
            max-width: 530px;
            margin: 20px auto;
            padding: 20px;
            background-color: #fff;
            border-radius: 12px; /* Increased for softer corners */
            box-shadow: 3px 3px 15px 5px rgba(0, 0, 0, 0.2);
}
    
        h1 {
            color: green;
        }
        input[type="number"] {
            padding: 10px;
            font-size: 18px;
            border: 2px solid black;
            border-radius: 4px;
            width: calc(100% - 16px);
            margin-bottom: 10px;
        }
        button {
            padding: 10px 20px;
            font-size: 16px;
            color: #fff;
            background-color: #007BFF;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }
        button:hover {
            background-color: #006400;
        }
        .result {
            margin-top: 20px;
            font-size: 18px;
            font-weight: bold;
        }
        .footer
        {
            text-align: center;
            padding:3px;
            color:white;
        }