header{
    background-color:silver;
    text-align: center;
}

header img{
    width: 200px;
    height:200px;
    border-radius: 90px;
}

header h2{
    margin-bottom: 0;
}

main{
    background-color: #808080;
    text-align: center;
    margin-bottom: 0;
    padding-bottom: 10px;
}

main div{
    color: white;
}

main h2{
    padding-top: 15px;
    margin-top: 0;
}

 footer{
    background-color: #C0C0C0;
 }

 .contents{
    position: relative;
    display: block;
    text-align: center;
    max-width: 500px;
    margin: 0 auto 20px;
 }

 .contents img{
    width:100%;
    height: auto;
    display: block;
    transition: opacity 0.3s ease;
 }

 .contents .overlay{
    position:absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
 }

 .contents:hover img {
    opacity: 0.7;
 }

 .contents:hover .overlay{
    opacity: 1;
 }

 .fade-in{
    opacity:0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out,transform 0.6s ease-out;
 }

 .fade-in.active{
    opacity: 1;
    transform: translateY(0);
 }