body
{
    text-align: center;
    font-family: Arial, Helvetica, sans-serif;
    width:50%;
    margin:auto;
    border: 2px solid black;
    
}
button
{
    background-color:lightblue;

}
button:hover
{
    background-color: darkblue;
}
button:active
{
    background-color: red;
}
#img
{
    box-sizing: borderbox;
    padding:10px;
}
img
{
    width:50px;
    height:50px;
}