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// Breakpoint viewport sizes and media queries.
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// Breakpoint viewport sizes and media queries.
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//
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//
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// Breakpoints are defined as a map of (name: minimum width), order from small to large:
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// Breakpoints are defined as a map of (name: minimum width), order from small to large:
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//
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//
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//    (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px)
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//    (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px)
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//
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//
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// The map defined in the `$grid-breakpoints` global variable is used as the `$breakpoints` argument by default.
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// The map defined in the `$grid-breakpoints` global variable is used as the `$breakpoints` argument by default.
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// Name of the next breakpoint, or null for the last breakpoint.
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// Name of the next breakpoint, or null for the last breakpoint.
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//
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//
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//    >> breakpoint-next(sm)
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//    >> breakpoint-next(sm)
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//    md
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//    md
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//    >> breakpoint-next(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))
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//    >> breakpoint-next(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px))
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//    md
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//    md
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//    >> breakpoint-next(sm, $breakpoint-names: (xs sm md lg xl))
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//    >> breakpoint-next(sm, $breakpoint-names: (xs sm md lg xl xxl))
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//    md
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//    md
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@function breakpoint-next($name, $breakpoints: $grid-breakpoints, $breakpoint-names: map-keys($breakpoints)) {
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@function breakpoint-next($name, $breakpoints: $grid-breakpoints, $breakpoint-names: map-keys($breakpoints)) {
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  $n: index($breakpoint-names, $name);
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  @if not $n {
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    @error "breakpoint `#{$name}` not found in `#{$breakpoints}`";
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  $n: index($breakpoint-names, $name);
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  }
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  @return if($n != null and $n < length($breakpoint-names), nth($breakpoint-names, $n + 1), null);
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  @return if($n < length($breakpoint-names), nth($breakpoint-names, $n + 1), null);
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}
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}
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// Minimum breakpoint width. Null for the smallest (first) breakpoint.
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// Minimum breakpoint width. Null for the smallest (first) breakpoint.
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//
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//
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//    >> breakpoint-min(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))
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//    >> breakpoint-min(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px))
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//    576px
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//    576px
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@function breakpoint-min($name, $breakpoints: $grid-breakpoints) {
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@function breakpoint-min($name, $breakpoints: $grid-breakpoints) {
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  $min: map-get($breakpoints, $name);
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  $min: map-get($breakpoints, $name);
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  @return if($min != 0, $min, null);
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  @return if($min != 0, $min, null);
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}
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}
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// Maximum breakpoint width. Null for the largest (last) breakpoint.
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// Maximum breakpoint width.
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// The maximum value is calculated as the minimum of the next one less 0.02px
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// The maximum value is reduced by 0.02px to work around the limitations of
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// to work around the limitations of `min-` and `max-` prefixes and viewports with fractional widths.
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// `min-` and `max-` prefixes and viewports with fractional widths.
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// See https://www.w3.org/TR/mediaqueries-4/#mq-min-max
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// See https://www.w3.org/TR/mediaqueries-4/#mq-min-max
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// Uses 0.02px rather than 0.01px to work around a current rounding bug in Safari.
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// Uses 0.02px rather than 0.01px to work around a current rounding bug in Safari.
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// See https://bugs.webkit.org/show_bug.cgi?id=178261
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// See https://bugs.webkit.org/show_bug.cgi?id=178261
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//
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//
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//    >> breakpoint-max(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))
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//    >> breakpoint-max(md, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px))
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//    767.98px
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//    767.98px
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@function breakpoint-max($name, $breakpoints: $grid-breakpoints) {
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@function breakpoint-max($name, $breakpoints: $grid-breakpoints) {
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  $next: breakpoint-next($name, $breakpoints);
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  $max: map-get($breakpoints, $name);
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  @return if($next, breakpoint-min($next, $breakpoints) - .02, null);
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  @return if($max and $max > 0, $max - .02, null);
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}
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}
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// Returns a blank string if smallest breakpoint, otherwise returns the name with a dash in front.
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// Returns a blank string if smallest breakpoint, otherwise returns the name with a dash in front.
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// Useful for making responsive utilities.
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// Useful for making responsive utilities.
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//
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//
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//    >> breakpoint-infix(xs, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))
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//    >> breakpoint-infix(xs, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px))
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//    ""  (Returns a blank string)
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//    ""  (Returns a blank string)
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//    >> breakpoint-infix(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px))
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//    >> breakpoint-infix(sm, (xs: 0, sm: 576px, md: 768px, lg: 992px, xl: 1200px, xxl: 1400px))
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// Media between the breakpoint's minimum and maximum widths.
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// Media between the breakpoint's minimum and maximum widths.
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// No minimum for the smallest breakpoint, and no maximum for the largest one.
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// No minimum for the smallest breakpoint, and no maximum for the largest one.
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// Makes the @content apply only to the given breakpoint, not viewports any wider or narrower.
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// Makes the @content apply only to the given breakpoint, not viewports any wider or narrower.
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@mixin media-breakpoint-only($name, $breakpoints: $grid-breakpoints) {
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@mixin media-breakpoint-only($name, $breakpoints: $grid-breakpoints) {
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  $min:  breakpoint-min($name, $breakpoints);
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  $min: breakpoint-min($name, $breakpoints);
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  $next: breakpoint-next($name, $breakpoints);
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  $max: breakpoint-max($name, $breakpoints);
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  $max:  breakpoint-max($next, $breakpoints);
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  @if $min != null and $max != null {
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  @if $min != null and $max != null {
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    @media (min-width: $min) and (max-width: $max) {
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    @media (min-width: $min) and (max-width: $max) {
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      @content;
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      @content;
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    }
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    }
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  } @else if $max == null {
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  } @else if $max == null {
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    @include media-breakpoint-up($name, $breakpoints) {
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    @include media-breakpoint-up($name, $breakpoints) {
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      @content;
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      @content;
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    }
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    }
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  } @else if $min == null {
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  } @else if $min == null {
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    @include media-breakpoint-down($name, $breakpoints) {
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    @include media-breakpoint-down($next, $breakpoints) {
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      @content;
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      @content;
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    }
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    }