body {
    display: block;
    margin: 0px;
}

#nav {
    display: flex;
    justify-content: space-evenly;
    text-align: center;
    background-color: rgb(0, 0, 0);
    position: fixed;
    width: 100%;
    z-index: 999;
    top: 0; 
}

#nav p {
    margin-top: 20px;
    font-size: 20px;
    color: aliceblue;
}
#nav a{
    text-decoration: none;
}
img{
    width: 100%;
}
.d-block{
    width: 100%;
    height: 50%;
}