body {
    font-family: -apple-system, BlinkMacSystemFont, 
    "Segoe UI", "Roboto", "Oxygen", 
    "Ubuntu", "Cantarell", "Fira Sans","Contrail One", cursive
    "Droid Sans", "Helvetica Neue", sans-serif;

}

<style>
@import url('https://fonts.googleapis.com/css2?family=Contrail+One&display=swap');
</style>

 header {
 	background: url(image.png);
 	height: 100vh;
 	margin-bottom: 2rem;
 	background-size: cover;
 }

 body {
 	margin: 0;
 }

 video {
    min-width: 100vw;
    min-height: 100vh;
    object-fit: cover;
    position: fixed;
}

@media (max-aspect-ratio: 16/9) {
    video {
        width: auto;
        height: 100%;

    }
}
@media (min-aspect-ratio: 16/9) {
    video {
        width: 100%;
        height:auto;
    
    }
}
@media (max-width: 767px) {
    video {
        display: none;
    }
    header {
        background: url(calloutbanner.png);
        background-size: cover;
    }
}

h1 {
  border: 3.5px solid white;
  font-size: 2.2em;
  text-transform:uppercase;
  margin: 0;
  padding:5px;
  font-family: "Contrail One", cursive ,Helvetica Neue, Arial, sans-serif;
  font-weight: bolder;

}
a {
    color: white;
    text-decoration: none;
    overflow: hidden;
    background: linear-gradient(to right, #53A65E 50% , white 50%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 100%;
    background-position: 100%;
    transition: background-position 275ms ease;

}

a:hover {
    color:#FF0000;
    text-decoration: underline;
    font-variant-position: left;
    background-position: 0 100%;
    text-decoration-line: line-through;

}
h2{
   font font-family: Arial Narrow, Arial , sans-serif;
   font-weight: normal;
}
.text-white {
    font-style: italic;
    font-size: 1.5em;
    margin: 5px;
    padding: 0px;
    font-family: Arial Narrow , Arial, sans-serif;
}

.text-green {
    color: #00FF00 ;
    font-family: Arial Narrow , Arial, sans-serif;
}
.overlay {
    position: absolute;
    top: 0;
    bottom: 50%;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: #fff;
}
html { font-size: 2vw; }