body {
            background: transparent !important; /* Transparent background, overrides any defaults */
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
        }

        .datecalculator {
            background: #FFF; /* White background for the calculator itself */
            border-radius: 16px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
            padding: 20px;
            width: 90%; /* Responsive width */
            max-width: 400px; /* Cap for larger screens */
            margin: auto;
            text-align: center;
            color: #000;
            box-sizing: border-box;
        }

        .datecalculator h1 {
            margin-bottom: 20px;
        }

        .input-group {
            margin-bottom: 15px;
        }

        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }

        input[type="date"] {
            width: 100%;
            padding: 8px;
            margin-bottom: 10px;
            border: 1px solid #444;
            border-radius: 5px;
            background: #FFF;
            color: #000;
            box-sizing: border-box;
        }

        button {
            background-color: #555;
            color: #fff;
            border: none;
            padding: 10px 20px;
            border-radius: 5px;
            cursor: pointer;
        }

        button:hover {
            background-color: #777;
        }

        .result {
            margin-top: 20px;
            font-size: 1.2em;
            word-wrap: break-word;
        }

        /* Media query for smaller screens */
        @media (max-width: 500px) {
            .datecalculator {
                padding: 15px;
            }
            .datecalculator h1 {
                font-size: 1.2em;
            }
            button {
                padding: 8px 16px;
            }
        }