nav {
background-color: lightgreen;
}

ul {
display: flex;
justify-content: flex-end;
padding: 0;
}

li {
display: inline;
padding: 10px;
}

#home {
margin-right: auto;
}

.dropdownContainer {
position: relative;
}

.dropdownMenu {
background-color: skyblue;
position: absolute;
flex-direction: column;
width: 100%;
left: Opx;
top: 100%;
visibility: hidden;
opacity: 0;
transition: opacity 0.5s, visibility 0.5s, top 0.5s;
}

.dropdownContainer:hover .dropdownMenu,
.dropdownMenu:hover {
visibility: visible;
opacity: 1;
top: 100%;
}