body {
  font-family: sans-serif;
  line-height: 1.5;
  margin: 1rem;
    margin-left: auto;
    margin-right: auto;
  max-width: 768px;
}

header {
  border-bottom: 1px solid #222;
  margin-bottom: 1rem;
}

footer {
  border-top: 1px solid #222;
  margin-top: 1rem;
}

.nav-list {
    margin: 0px;
    padding: 0px;
    height: 50px
}

.nav-list a {
    float: left;
    font-size: 16px;
    text-align: center;
    padding: 12px 16px;
    text-decoration: none;
    background-color: inherit;
}

.nav-list a:hover {
    background-color: #222;
}

.nav-dropdown {
    float: right;
    text-align: center;
    padding: 12px 16px;
    position: relative;
    display: inline-block;
    background-color: inherit;
}
.nav-dropdown:hover {
    background-color: #222;
}

.nav-dropdown-content a {
    display: block;
}

.nav-dropdown-content {
    display: none;
    position: absolute;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
    left: 0px;
    bottom: -140px;
}

.nav-dropdown:hover .nav-dropdown-content {
    display: flex;
    flex-direction: column;
}