* {
    margin:0px;
    background-color: black;
}

body, html {
  height: 100%;
  margin: 0;
}

header {
    text-align: center;
    color:white;
    text-decoration:underline ;
}

nav {
    border-bottom: 1px solid white;
    color:white;
    text-align: center;
}

ul {
    padding : 5px;
    display: flex;
    flex-direction: row;
    list-style: none;
    justify-content: center;
}

li {
    margin-left: 10px;
    margin-right: 10px;
}

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

main {
    width: 100%;
    height: calc(100vh - 71px);
    background-color: black;
}

.dvd {
    width: 100px;
}

marquee {
    height:calc(100vh - 71px);
}