body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(90deg, #1c1c1c, #6220fb);
    font-family: Arial, sans-serif;
}

.button-container {
    display: flex;
    flex-direction: column;
    justify-content: space-between; /* to distribute the buttons vertically */
    align-items: center;
    height: 60vh; /* adjust the height to fit the buttons */
}

button {
    border-radius: .5rem; /* Make the button edges slightly rounded */
    text-transform: uppercase;
    font-style: normal;
    font-weight: 600; /* Increase the font weight */
    padding: 15px 40px; /* Increase the padding */
    color: #fff;
    font-size: 1rem;
    letter-spacing: 1px; /* Increase the letter spacing */
    transition: all 0.3s;
    background-image: linear-gradient(90deg, #2f2f2f, #522afb); /* Improve gradient colors */
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2); /* Add a slight box shadow */
}

button:hover {
    padding: 15px 50px; /* Increase padding on hover */
    transition: all 0.3s;
}

.top {
    order: -1; /* Reorder the BMI button to the top */
}

.middle {
    order: 0; /* Keep the Normal calculator button in the middle */
}

.bottom {
    order: 1; /* Keep the Grades calculator button at the bottom */
}

@media only screen and (min-width: 768px) {
    .button-container {
        flex-direction: row;
        justify-content: center;
        height: auto; /* Revert height to auto for desktop */
    }

    .top {
        order: 0; /* Keep the BMI button at the top */
    }

    .middle {
        order: 1; /* Reorder the Normal calculator button to the middle */
    }

    .bottom {
        order: 2; /* Reorder the Grades calculator button to the bottom */
    }

    button {
        margin: 10px; /* Add some margin between buttons */
    }
}