body{
    font-family:sans-serif;
    background-image: linear-gradient(to bottom,  yellow, white, lightgreen );
}
h1{
    text-align:center;
    color:forestgreen;
    margin:30px 0 50px;
}
.gallery{
    margin:10px 50px;

}
.gallery img{
    width: 180px;
    padding: 5px;
    border:1px solid tranparent;
    border-radius: 25px;
    filter:grayscale(50%);
}
.gallery img:hover{
    filter:grayscale(0);
     border-radius: 5px;
    transform: scale(1.1);
    transition: ease-out .5s;
}