@charset 'UTF-8';

//     _            _           _                           _ _
//    (_)          | |         | |                         | (_)
//     _ _ __   ___| |_   _  __| | ___   _ __ ___   ___  __| |_  __ _
//    | | '_ \ / __| | | | |/ _` |/ _ \ | '_ ` _ \ / _ \/ _` | |/ _` |
//    | | | | | (__| | |_| | (_| |  __/ | | | | | |  __/ (_| | | (_| |
//    |_|_| |_|\___|_|\__,_|\__,_|\___| |_| |_| |_|\___|\__,_|_|\__,_|
//
//      Simple, elegant and maintainable media queries in Sass
//                        v1.4.2
//
//                http://include-media.com
//
//         Authors: Eduardo Boucas (@eduardoboucas)
//                  Hugo Giraudel (@hugogiraudel)
//
//      This project is licensed under the terms of the MIT license

////
/// include-media library public configuration
/// @author Eduardo Boucas
/// @access public
////

///
/// Creates a list of global breakpoints
///
/// @example scss - Creates a single breakpoint with the label `phone`
///  $breakpoints: ('phone': 320px);
///

$breakpoints: (
  "nill": 0px,
  "phone": 320px,
  "tween": 500px,
  "tablet": 768px,
  "desktop": 1024px,
) !default;

///
/// Creates a list of static expressions or media types
///
/// @example scss - Creates a single media type (screen)
///  $media-expressions: ('screen': 'screen');
///
/// @example scss - Creates a static expression with logical disjunction (OR operator)
///  $media-expressions: (
///    'retina2x': '(-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi)'
///  );
///
$media-expressions: (
  "screen": "screen",
  "print": "print",
  "handheld": "handheld",
  "landscape": "(orientation: landscape)",
  "portrait": "(orientation: portrait)",
  "retina2x": "(-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi)",
  "retina3x": "(-webkit-min-device-pixel-ratio: 3), (min-resolution: 350dpi)",
) !default;

///
/// Defines a number to be added or subtracted from each unit when declaring breakpoints with exclusive intervals
///
/// @example scss - Interval for pixels is defined as `1` by default
///  @include media('>128px') {}
///
///  /* Generates: */
///  @media (min-width: 129px) {}
///
/// @example scss - Interval for ems is defined as `0.01` by default
///  @include media('>20em') {}
///
///  /* Generates: */
///  @media (min-width: 20.01em) {}
///
/// @example scss - Interval for rems is defined as `0.1` by default, to be used with `font-size: 62.5%;`
///  @include media('>2.0rem') {}
///
///  /* Generates: */
///  @media (min-width: 2.1rem) {}
///
$unit-intervals: (
  "px": 1,
  "em": 0.01,
  "rem": 0.1,
) !default;

///
/// Defines whether support for media queries is available, useful for creating separate stylesheets
/// for browsers that don't support media queries.
///
/// @example scss - Disables support for media queries
///  $im-media-support: false;
///  @include media('>=tablet') {
///    .foo {
///      color: tomato;
///    }
///  }
///
///  /* Generates: */
///  .foo {
///    color: tomato;
///  }
///
$im-media-support: true !default;

///
/// Selects which breakpoint to emulate when support for media queries is disabled. Media queries that start at or
/// intercept the breakpoint will be displayed, any others will be ignored.
///
/// @example scss - This media query will show because it intercepts the static breakpoint
///  $im-media-support: false;
///  $im-no-media-breakpoint: 'desktop';
///  @include media('>=tablet') {
///    .foo {
///      color: tomato;
///    }
///  }
///
///  /* Generates: */
///  .foo {
///    color: tomato;
///  }
///
/// @example scss - This media query will NOT show because it does not intercept the desktop breakpoint
///  $im-media-support: false;
///  $im-no-media-breakpoint: 'tablet';
///  @include media('>=desktop') {
///    .foo {
///      color: tomato;
///    }
///  }
///
///  /* No output */
///
$im-no-media-breakpoint: "desktop" !default;

///
/// Selects which media expressions are allowed in an expression for it to be used when media queries
/// are not supported.
///
/// @example scss - This media query will show because it intercepts the static breakpoint and contains only accepted media expressions
///  $im-media-support: false;
///  $im-no-media-breakpoint: 'desktop';
///  $im-no-media-expressions: ('screen');
///  @include media('>=tablet', 'screen') {
///    .foo {
///      color: tomato;
///    }
///  }
///
///   /* Generates: */
///   .foo {
///     color: tomato;
///   }
///
/// @example scss - This media query will NOT show because it intercepts the static breakpoint but contains a media expression that is not accepted
///  $im-media-support: false;
///  $im-no-media-breakpoint: 'desktop';
///  $im-no-media-expressions: ('screen');
///  @include media('>=tablet', 'retina2x') {
///    .foo {
///      color: tomato;
///    }
///  }
///
///  /* No output */
///
$im-no-media-expressions: ("screen", "portrait", "landscape") !default;

////
/// Cross-engine logging engine
/// @author Hugo Giraudel
/// @access private
////

///
/// Log a message either with `@error` if supported
/// else with `@warn`, using `feature-exists('at-error')`
/// to detect support.
///
/// @param {String} $message - Message to log
///
@function log($message) {
  @if feature-exists("at-error") {
    @error $message;
  } @else {
    @warn $message;
    $_: noop();
  }

  @return $message;
}

///
/// Wrapper mixin for the log function so it can be used with a more friendly
/// API than `@if log('..') {}` or `$_: log('..')`. Basically, use the function
/// within functions because it is not possible to include a mixin in a function
/// and use the mixin everywhere else because it's much more elegant.
///
/// @param {String} $message - Message to log
///
@mixin log($message) {
  @if log($message) {
  }
}

///
/// Function with no `@return` called next to `@warn` in Sass 3.3
/// to trigger a compiling error and stop the process.
///
@function noop() {
}

///
/// Determines whether a list of conditions is intercepted by the static breakpoint.
///
/// @param {Arglist}   $conditions  - Media query conditions
///
/// @return {Boolean} - Returns true if the conditions are intercepted by the static breakpoint
///
@function im-intercepts-static-breakpoint($conditions...) {
  $no-media-breakpoint-value: map-get($breakpoints, $im-no-media-breakpoint);

  @if not $no-media-breakpoint-value {
    @if log("`#{$im-no-media-breakpoint}` is not a valid breakpoint.") {
    }
  }

  @each $condition in $conditions {
    @if not map-has-key($media-expressions, $condition) {
      $operator: get-expression-operator($condition);
      $prefix: get-expression-prefix($operator);
      $value: get-expression-value($condition, $operator);

      // scss-lint:disable SpaceAroundOperator
      @if ($prefix == "max" and $value <= $no-media-breakpoint-value) or ($prefix == "min" and $value > $no-media-breakpoint-value) {
        @return false;
      }
    } @else if not index($im-no-media-expressions, $condition) {
      @return false;
    }
  }

  @return true;
}

////
/// Parsing engine
/// @author Hugo Giraudel
/// @access private
////

///
/// Get operator of an expression
///
/// @param {String} $expression - Expression to extract operator from
///
/// @return {String} - Any of `>=`, `>`, `<=`, `<`, `≥`, `≤`
///
@function get-expression-operator($expression) {
  @each $operator in (">=", ">", "<=", "<", "≥", "≤") {
    @if str-index($expression, $operator) {
      @return $operator;
    }
  }

  // It is not possible to include a mixin inside a function, so we have to
  // rely on the `log(..)` function rather than the `log(..)` mixin. Because
  // functions cannot be called anywhere in Sass, we need to hack the call in
  // a dummy variable, such as `$_`. If anybody ever raise a scoping issue with
  // Sass 3.3, change this line in `@if log(..) {}` instead.
  $_: log("No operator found in `#{$expression}`.");
}

///
/// Get dimension of an expression, based on a found operator
///
/// @param {String} $expression - Expression to extract dimension from
/// @param {String} $operator - Operator from `$expression`
///
/// @return {String} - `width` or `height` (or potentially anything else)
///
@function get-expression-dimension($expression, $operator) {
  $operator-index: str-index($expression, $operator);
  $parsed-dimension: str-slice($expression, 0, $operator-index - 1);
  $dimension: "width";

  @if str-length($parsed-dimension) > 0 {
    $dimension: $parsed-dimension;
  }

  @return $dimension;
}

///
/// Get dimension prefix based on an operator
///
/// @param {String} $operator - Operator
///
/// @return {String} - `min` or `max`
///
@function get-expression-prefix($operator) {
  @return if(index(("<", "<=", "≤"), $operator), "max", "min");
}

///
/// Get value of an expression, based on a found operator
///
/// @param {String} $expression - Expression to extract value from
/// @param {String} $operator - Operator from `$expression`
///
/// @return {Number} - A numeric value
///
@function get-expression-value($expression, $operator) {
  $operator-index: str-index($expression, $operator);
  $value: str-slice($expression, $operator-index + str-length($operator));

  @if map-has-key($breakpoints, $value) {
    $value: map-get($breakpoints, $value);
  } @else {
    $value: to-number($value);
  }

  $interval: map-get($unit-intervals, unit($value));

  @if not $interval {
    // It is not possible to include a mixin inside a function, so we have to
    // rely on the `log(..)` function rather than the `log(..)` mixin. Because
    // functions cannot be called anywhere in Sass, we need to hack the call in
    // a dummy variable, such as `$_`. If anybody ever raise a scoping issue with
    // Sass 3.3, change this line in `@if log(..) {}` instead.
    $_: log("Unknown unit `#{unit($value)}`.");
  }

  @if $operator == ">" {
    $value: $value + $interval;
  } @else if $operator == "<" {
    $value: $value - $interval;
  }

  @return $value;
}

///
/// Parse an expression to return a valid media-query expression
///
/// @param {String} $expression - Expression to parse
///
/// @return {String} - Valid media query
///
@function parse-expression($expression) {
  // If it is part of $media-expressions, it has no operator
  // then there is no need to go any further, just return the value
  @if map-has-key($media-expressions, $expression) {
    @return map-get($media-expressions, $expression);
  }

  $operator: get-expression-operator($expression);
  $dimension: get-expression-dimension($expression, $operator);
  $prefix: get-expression-prefix($operator);
  $value: get-expression-value($expression, $operator);

  @return "(#{$prefix}-#{$dimension}: #{$value})";
}

///
/// Slice `$list` between `$start` and `$end` indexes
///
/// @access private
///
/// @param {List} $list - List to slice
/// @param {Number} $start [1] - Start index
/// @param {Number} $end [length($list)] - End index
///
/// @return {List} Sliced list
///
@function slice($list, $start: 1, $end: length($list)) {
  @if length($list) < 1 or $start > $end {
    @return ();
  }

  $result: ();

  @for $i from $start through $end {
    $result: append($result, nth($list, $i));
  }

  @return $result;
}

////
/// String to number converter
/// @author Hugo Giraudel
/// @access private
////

///
/// Casts a string into a number
///
/// @param {String | Number} $value - Value to be parsed
///
/// @return {Number}
///
@function to-number($value) {
  @if type-of($value) == "number" {
    @return $value;
  } @else if type-of($value) != "string" {
    $_: log("Value for `to-number` should be a number or a string.");
  }

  $result: 0;
  $digits: 0;
  $minus: str-slice($value, 1, 1) == "-";
  $numbers: (
    "0": 0,
    "1": 1,
    "2": 2,
    "3": 3,
    "4": 4,
    "5": 5,
    "6": 6,
    "7": 7,
    "8": 8,
    "9": 9,
  );

  @for $i from if($minus, 2, 1) through str-length($value) {
    $character: str-slice($value, $i, $i);

    @if not(index(map-keys($numbers), $character) or $character == ".") {
      @return to-length(if($minus, -$result, $result), str-slice($value, $i));
    }

    @if $character == "." {
      $digits: 1;
    } @else if $digits == 0 {
      $result: $result * 10 + map-get($numbers, $character);
    } @else {
      $digits: $digits * 10;
      $result: $result + map-get($numbers, $character) / $digits;
    }
  }

  @return if($minus, -$result, $result);
}

///
/// Add `$unit` to `$value`
///
/// @param {Number} $value - Value to add unit to
/// @param {String} $unit - String representation of the unit
///
/// @return {Number} - `$value` expressed in `$unit`
///
@function to-length($value, $unit) {
  $units: (
    "px": 1px,
    "cm": 1cm,
    "mm": 1mm,
    "%": 1%,
    "ch": 1ch,
    "pc": 1pc,
    "in": 1in,
    "em": 1em,
    "rem": 1rem,
    "pt": 1pt,
    "ex": 1ex,
    "vw": 1vw,
    "vh": 1vh,
    "vmin": 1vmin,
    "vmax": 1vmax,
  );

  @if not index(map-keys($units), $unit) {
    $_: log("Invalid unit `#{$unit}`.");
  }

  @return $value * map-get($units, $unit);
}

///
/// This mixin aims at redefining the configuration just for the scope of
/// the call. It is helpful when having a component needing an extended
/// configuration such as custom breakpoints (referred to as tweakpoints)
/// for instance.
///
/// @author Hugo Giraudel
///
/// @param {Map} $tweakpoints [()] - Map of tweakpoints to be merged with `$breakpoints`
/// @param {Map} $tweak-media-expressions [()] - Map of tweaked media expressions to be merged with `$media-expression`
///
/// @example scss - Extend the global breakpoints with a tweakpoint
///  @include media-context(('custom': 678px)) {
///    .foo {
///      @include media('>phone', '<=custom') {
///       // ...
///      }
///    }
///  }
///
/// @example scss - Extend the global media expressions with a custom one
///  @include media-context($tweak-media-expressions: ('all': 'all')) {
///    .foo {
///      @include media('all', '>phone') {
///       // ...
///      }
///    }
///  }
///
/// @example scss - Extend both configuration maps
///  @include media-context(('custom': 678px), ('all': 'all')) {
///    .foo {
///      @include media('all', '>phone', '<=custom') {
///       // ...
///      }
///    }
///  }
///
@mixin media-context($tweakpoints: (), $tweak-media-expressions: ()) {
  // Save global configuration
  $global-breakpoints: $breakpoints;
  $global-media-expressions: $media-expressions;

  // Update global configuration
  $breakpoints: map-merge($breakpoints, $tweakpoints) !global;
  $media-expressions: map-merge($media-expressions, $tweak-media-expressions) !global;

  @content;

  // Restore global configuration
  $breakpoints: $global-breakpoints !global;
  $media-expressions: $global-media-expressions !global;
}

////
/// include-media public exposed API
/// @author Eduardo Boucas
/// @access public
////

///
/// Generates a media query based on a list of conditions
///
/// @param {Arglist}   $conditions  - Media query conditions
///
/// @example scss - With a single set breakpoint
///  @include media('>phone') { }
///
/// @example scss - With two set breakpoints
///  @include media('>phone', '<=tablet') { }
///
/// @example scss - With custom values
///  @include media('>=358px', '<850px') { }
///
/// @example scss - With set breakpoints with custom values
///  @include media('>desktop', '<=1350px') { }
///
/// @example scss - With a static expression
///  @include media('retina2x') { }
///
/// @example scss - Mixing everything
///  @include media('>=350px', '<tablet', 'retina3x') { }
///
@mixin media($conditions...) {
  // scss-lint:disable SpaceAroundOperator
  @if ($im-media-support and length($conditions) == 0) or (not $im-media-support and im-intercepts-static-breakpoint($conditions...)) {
    @content;
  } @else if ($im-media-support and length($conditions) > 0) {
    @media #{unquote(parse-expression(nth($conditions, 1)))} {
      // Recursive call
      @include media(slice($conditions, 2)...) {
        @content;
      }
    }
  }
}
