body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background: url('background.png') repeat;
    display: flex;
    justify-content: center;
    align-items: center;
}

.mainimage {
    border-radius: 150px; 
    transform: scale(0.6633);
    transition: transform 0.3s ease-in-out;
    z-index: 0;
    position: relative;
}

.image-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}