h1{
    color: blue;
}
h2{
    color: red;
}
#top img{
    margin-right: 20%;
}
#top a{
    padding-right: 50px;
}
#top{
    background-color: aquamarine;
    padding-bottom: 20px;
}
body{
    background-color: #B6FFFA;
}
input:required{
    border: 2px groove violet;
}
input:optional{
    border: 2px dashed violet;
}
input:disabled{
    border: 2px dotted violet;
}
.p{
    display: none;
}
input:hover +p{ 
    display: inline;
    background-color: red;
}
input:focus{
    background-color: silver;
    font-weight: bold;
}
.img{
    display: none;
}
input[type="email"]:focus:valid ~ img.valid{
    display: inline;
    height: 20px;
    width: 20px;
}
input[type="email"]:focus:invalid ~ img.invalid{
    display: inline;
    height: 20px;
    width: 20px;
}
input[type="submit"]{
    border: 2px solid violet;
}