/// Responsive Typographical size map.
$fluid-type-sizing: () !default;
$fluid-type-sizing: map-merge((
        'hero': (
                'breakpoint-min': map_get($breakpoints, xs),
                'breakpoint-max': map_get($breakpoints, xxl),
                'size-min': 24px,
                'size-max': 76px
        ),
        'h1': (
                'breakpoint-min': map_get($breakpoints, xs),
                'breakpoint-max': map_get($breakpoints, xxl),
                'size-min': 25px,
                'size-max': 49px
        ),
        'h2': (
                'breakpoint-min': map_get($breakpoints, xs),
                'breakpoint-max': map_get($breakpoints, xxl),
                'size-min': 20px,
                'size-max': 39px
        ),
        'h3': (
                'breakpoint-min': map_get($breakpoints, xs),
                'breakpoint-max': map_get($breakpoints, xxl),
                'size-min': 16px,
                'size-max': 31px
        ),
        'h4': (
                'breakpoint-min': map_get($breakpoints, xs),
                'breakpoint-max': map_get($breakpoints, xxl),
                'size-min': 13px,
                'size-max': 25px
        ),
        'h5': (
                'breakpoint-min': map_get($breakpoints, xs),
                'breakpoint-max': map_get($breakpoints, xxl),
                'size-min': 10px,
                'size-max': 20px
        ),
        'h6': (
                'breakpoint-min': map_get($breakpoints, xs),
                'breakpoint-max': map_get($breakpoints, xxl),
                'size-min': 10px,
                'size-max': 16px
        )
), $fluid-type-sizing);