@function breakpoint-min($name, $breakpoints: $breakpoints) {
	$min: map-get($breakpoints, $name);
	@return if($min != 0, $min, null);
}

@function breakpoint-max($name, $breakpoints: $breakpoints) {
	$max: map-get($breakpoints, $name);
	@return if($max and $max > 0, $max - 0.02, null);
}

@function breakpoint-next($name, $breakpoints: $breakpoints) {
	$keys: map-keys($breakpoints);
	$index: index($keys, $name);
	@if not $index {
		@error "breakpoint `#{$name}` not found in `#{$breakpoints}`";
	}
	@return if($index < length($keys), nth($keys, $index + 1), null);
}

@mixin media-breakpoint-between($lower, $upper, $breakpoints: $breakpoints) {
	$min: breakpoint-min($lower, $breakpoints);
	$max: breakpoint-max($upper, $breakpoints);
	@if $min != null and $max != null {
		@media (min-width: $min) and (max-width: $max) {
			@content;
		}
	} @else if $max == null {
		@include media-breakpoint-up($lower, $breakpoints) {
			@content;
		}
	} @else if $min == null {
		@include media-breakpoint-down($upper, $breakpoints) {
			@content;
		}
	}
}

@mixin media-breakpoint-down($name, $breakpoints: $breakpoints) {
	$max: breakpoint-max($name, $breakpoints);
	@if $max {
		@media (max-width: $max) {
			@content;
		}
	} @else {
		@content;
	}
}

@mixin media-breakpoint-up($name, $breakpoints: $breakpoints) {
	$min: breakpoint-min($name, $breakpoints);
	@if $min {
		@media (min-width: $min) {
			@content;
		}
	} @else {
		@content;
	}
}