nav ul li.dropdown {
    position: relative;
}

nav ul li .submenu {
    display: none;
    position: absolute;
    top: 120%; / below the parent /
    left: 0;
    background: #2f4f4f; / match your body background /
    padding: 0;
    list-style: none;
    border: 1px solid #50c878;
    min-width: 150px;
    z-index: 1001;
}

nav ul li .submenu li a {
    display: block;
    padding: 10px 15px;
    color: #50c878; / same as nav links /
    text-decoration: none;
}

nav ul li .submenu li a:hover {
    text-decoration: underline;
    background-color: #4169e2;
}

nav ul li.dropdown:hover .submenu {
    display: block;
}

nav ul li {
    position: relative;
}

nav ul {
    font-size: 1em;
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 2vw;
    position: fixed;
    top: 3%;
    right: 5%;
    z-index: 1000;
}

nav a {
    text-decoration: none;
    color: #50c878;
}

nav a:hover {
    text-decoration: underline;
}


h1 {
    font-size: 1.5em;
    color: #50c878;
    padding: 1.5em 0em;
    border-radius: 1em;
    display: inline-block;
    margin-left: 10vw;
}

body {
    background-color: #2f4f4f ;
    color: #54d68d;
    margin-left: 3vw;
}

p {
    margin-left: 3vw;
}

a {
    color: #4169e2;
}