header {
    background-color: silver;
    color: white;
    text-align: center;
 }
 body{
    background-image: linear-gradient(blue , cyan ;
    color:aliceblue; font-family: 'Times New Roman', Times, serif;
 }
 #placeholder{
    background-image: linear-gradient cyan , blue );
    display : flex;
    justify-content: center;
    align-items: center;

    
 }
 img{
    width : 200px
 }
 footer{
    background-image: linear-gradient cyan, lime;
    color :silver;
 }

 button{
    font-size: 5px;
    background-color:floralwhite;
    color:silver;
    border-radius: 10px;
    
 }