main > nav {
    position: sticky;
    top: 2rem;
    align-self: start;
}
/* Sidebar Navigation */
.section-nav li.active > a {
    color: #ffffff;
    font-weight: 500;
}

/* Sidebar Navigation */
.section-nav {
  padding: 20px;
  margin: 0 auto;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
  border-radius: 10px;
}

.section-nav a {
    text-decoration: none;
    display: block;
    padding: .125rem 0;
    color: #ccc;
    transition: all 50ms ease-in-out; /* 💡 This small transition makes setting of the active state smooth */
}

.section-nav a:hover,
.section-nav a:focus {
    color: #666;
}

li {
    margin-left: 1rem;;
}
ul, ol {
    list-style: none;
    margin: 0;
    padding: 0;
}