Buttons
<Button />
&:hover, &:focus
<Button variant="outline" color="primary" />
&:hover, &:focus
<Button variant="text" color="primary" />
&:hover, &:focus
<Button disableShadow color="primary" />
<Button disabled />
<Button variant="text" disabled />
<Button startIcon="local_grocery_store" color="primary" />
<Button endIcon="local_grocery_store" color="primary" />
<Button size="sm" color="primary" />
<Button size="md" color="primary" />
<Button size="lg" color="primary" />
<Button color="default" />
&:hover, &:focus
<Button color="primary" />
&:hover, &:focus
<Button color="secondary" />
&:hover, &:focus
<Button color="danger" />
&:hover, &:focus