$breakpoints: (
    'sm': 767px,
    'md': 992px,
    'lg': 1200px
) !default;

/// Mixin to manage responsive breakpoints
/// author: Hugo Giraudel
/// @param {String} $breakpoint - Breakpoint name
/// @require $breakpoints
@mixin bp($breakpoint) {
    // If the key exists in the map
    @if map-has-key($breakpoints, $breakpoint) {
      // Prints a media query based on the value
      @media (min-width: map-get($breakpoints, $breakpoint)) {
        @content;
      }
    }

    // If the key doesn't exist in the map
    @else {
      @warn "Unfortunately, no value could be retrieved from `#{$breakpoint}`. "
          + "Available breakpoints are: #{map-keys($breakpoints)}.";
    }
  }