html,
body
{
    height: 100%;
    margin: 0;
}

body
{
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

nav
{
    margin-bottom: 2rem;
}

nav a
{
    margin-right: 1rem;
    text-decoration: none;
    color: gray;
}

.active-link
{
    color: dodgerblue;
    font-weight: bold;
}

#app
{
    flex: 1;
    opacity: 0;
    transform: translateY(10px);

    transition:
        opacity 0.2s ease,
        transform 0.2s ease;
}

#app.active
{
    opacity: 1;
    transform: translateY(0);
}