<div class="m-buttons">
	<a href="#" class="a-button">button</a>
	<a href="#" class="a-button">button</a>
</div>

<hr>

<div class="m-buttons text-center">
	<a href="#" class="a-button">button</a>
	<a href="#" class="a-button">button</a>
</div>

.m-buttons {

    font-size: 0;
    margin: space(1) * -1;

    > * {

        margin: space(1);

    }

}