tailwind css margin auto

1<div class="mt-8 md:my-8">
2    <!-- ... -->
3</div>

1m-auto	margin: auto;

1<div class="m-8 ...">m-8</div>

1<div class="mt-8 ...">mt-8</div>
2<div class="mr-8 ...">mr-8</div>
3<div class="mb-8 ...">mb-8</div>
4<div class="ml-8 ...">ml-8</div>

1<div class="w-32 h-16 bg-fuchsia-300 ..."></div>
2<div class="-mt-8 bg-fuchsia-500 ...">-mt-8</div>

1<div class="my-8 ...">my-8</div>