body{
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
img{
    width: 500px;
    height: "auto";
}
footer{
    background-color: #333;
    color: #fff;
    padding: 1em;
    text-align: center;
}
#container{
    margin: 15px;
    flex: 1;
    padding: 2em;
}
header{
    text-align: center;
    background-color: #333;
    color: #fff;
    padding: 1em;
}
a{
    color: aqua;
}