h1 {
    color:red;
    text-align: center;
font-size: 50px;
text-shadow: 2px 2px 5px black;
}

body {background-color: rgb(127, 140, 255);

}

h2 { text-align: center;}
P, u1 {
    color: crimson;
    background-color: aliceblue;
    padding: 20px;
    box-shadow: 2px 2px 5px darkred;
width: 70%;
margin:auto;

border-style:solid;
border-width: 5px;
border-radius: 20px;

}

iframe {
    display: block;
    margin:auto;
}

nav {
    background-color: cadetblue;
    translate: 0 -3px;

    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
}
a {
    background-color: chartreuse;
    padding: inline-block;
    margin: 5px;
    color: blueviolet;
    text-decoration: none;
    transition-duration: 300ms;
}

a:hover{
    background-color: blue;
    translate: 0 -3px;
}