main li a:hover {
    text-decoration: underline;
    color: blue;
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center; 
    height: 100%;
    width: 100%;
  
}

img{
    max-width: 100%;
}

.image-half{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}