body {
    background:
    linear-gradient(
      rgba(0, 0, 0, 0.6), 
      rgba(0, 0, 0, 0.6)
    ), url("bg.jpg");
    background-position:top;
    background-size: 100%;
}
.nav ul {
    overflow:unset;
    text-align: center;
}
.nav li {
    font-family: sans-serif;
    padding: 0px;
    margin: 0px 5px;
    list-style: none;
    font-size: 18px;
    display: inline-block;
    position: relative;
}
.nav a {
    color: white;
    text-decoration: none;
    margin: 0px;
    padding: 8px 15px;
    border-radius: 15px;
}
.nav a:hover {
    color: rgb(0, 0, 0);
    background-color: rgba(255, 255, 255, 1);
    transition: 0.2s ease;
}
#logo {
    color: white;
    font-family: calibri, sans-serif;
    font-weight: 650;
    justify-content: left;
    padding: 5px;
    margin: 0px 10px;
    font-size: 26px;
}
.main {
    max-width: 90%;
    margin: auto;
}