index.css

body, html{
    margin: 0;
    padding: 0;
    font-family: 'Open Sans', sans-serif;
    background: rgb(255, 255, 255);
    color: #fff ;
}

body{
    background-size: cover;
}

#vanta{
    z-index: 0;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}

video{
    z-index: 0 ;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

ul{
    box-sizing: border-box;
    list-style: none;
    margin: 0 auto;
    padding: 3em;
    
}
ul > li {
    background-color:#fffa ;
    backdrop-filter: blur(10px) saturate(160%) contrast(180%);
    border-radius: 10em;
    padding : 1em;
    margin: 1.4em 0 ;
    width: 400px;
    box-shadow: rgba(239, 136, 52, 0.938) 0px 2px 30px 5px;

    
}

ul > li > a {
    
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 1em;
}

a{
    color: black;
    text-decoration: none;
}

header {
    margin-top: 1em;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

header > img {
    width: 8em;
    height: 8em;
    border-radius: 100%;
    border: 1px solid #fff ;
    box-shadow: rgba(239, 136, 52, 0.938) 0px 2px 80px 10px;;
} 

main{
    position: relative;
    opacity: 0;
    transition: opacity 2s ease-in-out;
}

header > h1 {
    display: inline-block;
    font-size: 1.5em;
    font-weight: bold;
    border-radius: 1em;
    background-color:rgba(44, 42, 36, 0.5)  ;
    color: #fff;
    padding: 0.3em 0.6em;
    border: 1px solid #fffa;
    box-shadow: rgba(239, 136, 52, 0.938) 0px 2px 80px 10px;;

}