body {
    background-image: url(windows.jpg);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

h1 {
    text-align: center;
    margin-top: 20px;
}


.is  {
    background-color: pink;
    width: 80%;
    max-width: 500px;
    margin: 40px auto; /* centers horizontally and adds top/bottom space */
    padding: 20px;
    font-family: Arial, sans-serif;
    box-sizing: border-box;
    height: 80vh;
}

img {
    display: block;
    margin: 20px auto; /* centers the image horizontally */
    width: 80%;
    height: 60%;
}

.radio-submit-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-left: 20px;
}

#submit {
    margin-left: 30px;
}