nav {
    background-color: purple;
    padding: 10px;

    position: fixed;   /* This fixes the navigation bar to the top of the page */
    top: 0;
    left: 0;
    width: 100%;
}
a {
    display: inline-block;   /* This makes margin, padding and translate work properly */
    background-color: pink;
    padding: 10px;
    margin: 5px;
    color: black;
    text-decoration: none;   /* This removes the underline */
    transition-duration: 300ms;   /* This controls how long it takes to change styles */
}
a:hover {   /* These styles are only applied when you are hovering on the <a> */
    background-color: red;
    translate: 0 -3px;   /* Move upwards */
}
h1 {
    margin-top: 100px;   /* This adds space to the top of the <h1> so it appears under the fixed navigation bar */
}


h1
{color:rgb(0, 0, 0);
    text-align:center;
font-size: 60px;
text-shadow: 2px 2px 5px black;
font-family: Barlow;
}


body 

 {
    background-color: rgb(90, 134, 163);
background-image:linear-gradient(rgb(57, 57, 94) ,rgb(158, 158, 255));
min-height:  100vh;

}

body.dogs {
    background-image:linear-gradient(red, rgb(184, 149, 53))
}

h1{
    color: rgb(255, 255, 255);
    background-color: rgb(0, 0, 0);
padding: 20px;;
 box-shadow: 2px 2px 5px;
 width: 70%;

margin: auto;
}
iframe{
    display: block;
margin: auto;