body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
        }


        .tab {
            overflow: hidden;
            border: 1px solid #8ba1b6;
            background-color: #8ba1b6;
        }

        .tab button {
            background-color: inherit;
            float: left;
            border: none;
            outline: none;
            cursor: pointer;
            padding: 14px 16px;
            transition: 0.3s;
            font-size: 16px;
        }

        .tab button:hover {
            background-color: #ddd;
        }

        .tab button.active {
            background-color: #ccc;
        }

        .tabcontent {
            display: none;
            padding: 20px;
            border: 1px solid #ccc;
            border-top: none;
        }

        form {
            margin-top: 20px;
        }

        label {
            display: block;
            margin-bottom: 10px;
        }

        input[type="number"] {
            width: 100%;
            padding: 10px;
            margin-bottom: 10px;
            border: 1px solid #ccc;
            border-radius: 5px;
            box-sizing: border-box;
        }

        input[type="button"], .app-button {
            background-color: #226baa;
            color: white;
            padding: 14px 20px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            width: 100%;
            font-size: 16px;
        }

        input[type="button"]:hover, .app-button:hover {
            background-color: #1c578a;
        }

        .result {
            margin-top: 20px;
            font-size: 18px;
            color: #071d42;
        }