//
// Mixins
// --------------------------------------------------

// UTILITY MIXINS
// --------------------------------------------------

// Clearfix
// --------
// For clearing floats like a boss h5bp.com/q
=clearfix
  *zoom: 1
  &:before,
  &:after
    display: table
    content: ""
    // Fixes Opera/contenteditable bug:
    // http://nicolasgallagher.com/micro-clearfix-hack/#comment-36952
    line-height: 0
  &:after
    clear: both

// Webkit-style focus
// ------------------
=tab-focus
  // Default
  outline: thin dotted #333
  // Webkit
  outline: 5px auto -webkit-focus-ring-color
  outline-offset: -2px

// Center-align a block level element
// ----------------------------------
=center-block
  display: block
  margin-left: auto
  margin-right: auto

// IE7 inline-block
// ----------------
=ie7-inline-block
  *display: inline
  /* IE7 inline-block hack
  *zoom: 1

// IE7 likes to collapse whitespace on either side of the inline-block elements.
// Ems because we're attempting to match the width of a space character. Left
// version is for form buttons, which typically come after other elements, and
// right version is for icons, which come before. Applying both is ok, but it will
// mean that space between those elements will be .6em (~2 space characters) in IE7,
// instead of the 1 space in other browsers.
=ie7-restore-left-whitespace
  *margin-left: .3em
  &:first-child
    *margin-left: 0

=ie7-restore-right-whitespace
  *margin-right: .3em

// Sizing shortcuts
// -------------------------
=size($height, $width)
  width: $width
  height: $height

=square($size)
  +size($size, $size)

// Placeholder text
// -------------------------
=placeholder($color: $placeholderText)
  &:-moz-placeholder
    color: $color
  &:-ms-input-placeholder
    color: $color
  &::-webkit-input-placeholder
    color: $color

// Text overflow
// -------------------------
// Requires inline-block or block for proper styling
=text-overflow
  overflow: hidden
  text-overflow: ellipsis
  white-space: nowrap

// CSS image replacement
// -------------------------
// Source: https://github.com/h5bp/html5-boilerplate/commit/aa0396eae757
=hide-text
  font: 0 / 0 a
  color: transparent
  text-shadow: none
  background-color: transparent
  border: 0

// FONTS
// --------------------------------------------------

=font-family-serif
  font-family: $serifFontFamily

=font-family-sans-serif
  font-family: $sansFontFamily

=font-family-monospace
  font-family: $monoFontFamily

=font-shorthand($size: $baseFontSize, $weight: normal, $lineHeight: $baseLineHeight)
  font-size: $size
  font-weight: $weight
  line-height: $lineHeight

=font-serif($size: $baseFontSize, $weight: normal, $lineHeight: $baseLineHeight)
  +font-family-serif
  +font-shorthand($size, $weight, $lineHeight)

=font-sans-serif($size: $baseFontSize, $weight: normal, $lineHeight: $baseLineHeight)
  +font-family-sans-serif
  +font-shorthand($size, $weight, $lineHeight)

=font-monospace($size: $baseFontSize, $weight: normal, $lineHeight: $baseLineHeight)
  +font-family-monospace
  +font-shorthand($size, $weight, $lineHeight)

// FORMS
// --------------------------------------------------

// Block level inputs
=input-block-level
  display: block
  width: 100%
  min-height: $inputHeight
  // Make inputs at least the height of their button counterpart (base line-height + padding + border)
  +box-sizing(border-box)
  // Makes inputs behave like true block-level elements

// Mixin for form field states
=formFieldState($textColor: #555555, $borderColor: #cccccc, $backgroundColor: whitesmoke)
  // Set the text color
  > label,
  .help-block,
  .help-inline
    color: $textColor
  // Style inputs accordingly
  .checkbox,
  .radio,
  input,
  select,
  textarea
    color: $textColor
  input,
  select,
  textarea
    border-color: $borderColor
    +box-shadow(inset 0 1px 1px rgba(0, 0, 0, 0.075))
    // Redeclare so transitions work
    &:focus
      border-color: darken($borderColor, 10%)
      +box-shadow(inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 6px lighten($borderColor, 20%))
  // Give a small background color for input-prepend/-append
  .input-prepend .add-on,
  .input-append .add-on
    color: $textColor
    background-color: $backgroundColor
    border-color: $textColor

// CSS3 PROPERTIES
// --------------------------------------------------

// Border Radius
=border-radius($radius)
  -webkit-border-radius: $radius
  -moz-border-radius: $radius
  border-radius: $radius

// Single Corner Border Radius
=border-top-left-radius($radius)
  -webkit-border-top-left-radius: $radius
  -moz-border-radius-topleft: $radius
  border-top-left-radius: $radius

=border-top-right-radius($radius)
  -webkit-border-top-right-radius: $radius
  -moz-border-radius-topright: $radius
  border-top-right-radius: $radius

=border-bottom-right-radius($radius)
  -webkit-border-bottom-right-radius: $radius
  -moz-border-radius-bottomright: $radius
  border-bottom-right-radius: $radius

=border-bottom-left-radius($radius)
  -webkit-border-bottom-left-radius: $radius
  -moz-border-radius-bottomleft: $radius
  border-bottom-left-radius: $radius

// Single Side Border Radius
=border-top-radius($radius)
  +border-top-right-radius($radius)
  +border-top-left-radius($radius)

=border-right-radius($radius)
  +border-top-right-radius($radius)
  +border-bottom-right-radius($radius)

=border-bottom-radius($radius)
  +border-bottom-right-radius($radius)
  +border-bottom-left-radius($radius)

=border-left-radius($radius)
  +border-top-left-radius($radius)
  +border-bottom-left-radius($radius)

// Drop shadows
=box-shadow($shadow...)
  -webkit-box-shadow: $shadow
  -moz-box-shadow: $shadow
  box-shadow: $shadow

// Transitions
=transition($transition...)
  -webkit-transition: $transition
  -moz-transition: $transition
  -o-transition: $transition
  transition: $transition

=transition-delay($transition-delay)
  -webkit-transition-delay: $transition-delay
  -moz-transition-delay: $transition-delay
  -o-transition-delay: $transition-delay
  transition-delay: $transition-delay

// Transformations
=rotate($degrees)
  -webkit-transform: rotate($degrees)
  -moz-transform: rotate($degrees)
  -ms-transform: rotate($degrees)
  -o-transform: rotate($degrees)
  transform: rotate($degrees)

=scale($ratio)
  -webkit-transform: scale($ratio)
  -moz-transform: scale($ratio)
  -ms-transform: scale($ratio)
  -o-transform: scale($ratio)
  transform: scale($ratio)

=translate($x, $y)
  -webkit-transform: translate($x, $y)
  -moz-transform: translate($x, $y)
  -ms-transform: translate($x, $y)
  -o-transform: translate($x, $y)
  transform: translate($x, $y)

=skew($x, $y)
  -webkit-transform: skew($x, $y)
  -moz-transform: skew($x, $y)
  -ms-transform: skewX($x) skewY($y)
  // See https://github.com/twitter/bootstrap/issues/4885
  -o-transform: skew($x, $y)
  transform: skew($x, $y)
  -webkit-backface-visibility: hidden
  // See https://github.com/twitter/bootstrap/issues/5319

=translate3d($x, $y, $z)
  -webkit-transform: translate3d($x, $y, $z)
  -moz-transform: translate3d($x, $y, $z)
  -o-transform: translate3d($x, $y, $z)
  transform: translate3d($x, $y, $z)

// Backface visibility
// Prevent browsers from flickering when using CSS 3D transforms.
// Default value is `visible`, but can be changed to `hidden
// See git pull https://github.com/dannykeane/bootstrap.git backface-visibility for examples
=backface-visibility($visibility)
  -webkit-backface-visibility: $visibility
  -moz-backface-visibility: $visibility
  backface-visibility: $visibility

// Background clipping
// Heads up: FF 3.6 and under need "padding" instead of "padding-box"
=background-clip($clip)
  -webkit-background-clip: $clip
  -moz-background-clip: $clip
  background-clip: $clip

// Background sizing
=background-size($size)
  -webkit-background-size: $size
  -moz-background-size: $size
  -o-background-size: $size
  background-size: $size

// Box sizing
=box-sizing($boxmodel)
  -webkit-box-sizing: $boxmodel
  -moz-box-sizing: $boxmodel
  box-sizing: $boxmodel

// User select
// For selecting text on the page
=user-select($select)
  -webkit-user-select: $select
  -moz-user-select: $select
  -ms-user-select: $select
  -o-user-select: $select
  user-select: $select

// Resize anything
=resizable($direction)
  resize: $direction
  // Options: horizontal, vertical, both
  overflow: auto
  // Safari fix

// CSS3 Content Columns
=content-columns($columnCount, $columnGap: $gridGutterWidth)
  -webkit-column-count: $columnCount
  -moz-column-count: $columnCount
  column-count: $columnCount
  -webkit-column-gap: $columnGap
  -moz-column-gap: $columnGap
  column-gap: $columnGap

// Optional hyphenation
=hyphens($mode: auto)
  word-wrap: break-word
  -webkit-hyphens: $mode
  -moz-hyphens: $mode
  -ms-hyphens: $mode
  -o-hyphens: $mode
  hyphens: $mode

// Opacity
=opacity($opacity)
  opacity: $opacity / 100
  filter: alpha(opacity = $opacity)

// BACKGROUNDS
// --------------------------------------------------

// Add an alphatransparency value to any background or border color (via Elyse Holladay)
=translucent-background($color: $white, $alpha: 1)
  background-color: hsla(hue($color), saturation($color), lightness($color), $alpha)

=translucent-border($color: $white, $alpha: 1)
  border-color: hsla(hue($color), saturation($color), lightness($color), $alpha)
  +background-clip(padding-box)

// Gradient Bar Colors for buttons and alerts
=gradientBar($primaryColor, $secondaryColor, $textColor: white, $textShadow: 0 -1px 0 rgba(0, 0, 0, 0.25))
  color: $textColor
  text-shadow: $textShadow
  +gradient-vertical($primaryColor, $secondaryColor)
  border-color: $secondaryColor $secondaryColor darken($secondaryColor, 15%)
  border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) fade-in(rgba(0, 0, 0, 0.1), 0.15)

// Gradients
=gradient-horizontal($startColor: #555555, $endColor: #333333)
  background-color: $endColor
  background-image: -moz-linear-gradient(left, $startColor, $endColor)
  // FF 3.6+
  background-image: -webkit-gradient(linear, 0 0, 100% 0, from($startColor), to($endColor))
  // Safari 4+, Chrome 2+
  background-image: -webkit-linear-gradient(left, $startColor, $endColor)
  // Safari 5.1+, Chrome 10+
  background-image: -o-linear-gradient(left, $startColor, $endColor)
  // Opera 11.10
  background-image: linear-gradient(to right, $startColor, $endColor)
  // Standard, IE10
  background-repeat: repeat-x
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#{ie-hex-str($startColor)}', endColorstr='#{ie-hex-str($endColor)}', GradientType=1)
  // IE9 and down

=gradient-vertical($startColor: #555555, $endColor: #333333)
  background-color: mix($startColor, $endColor, 62.5%)
  background-image: -moz-linear-gradient(top, $startColor, $endColor)
  // FF 3.6+
  background-image: -webkit-gradient(linear, 0 0, 0 100%, from($startColor), to($endColor))
  // Safari 4+, Chrome 2+
  background-image: -webkit-linear-gradient(top, $startColor, $endColor)
  // Safari 5.1+, Chrome 10+
  background-image: -o-linear-gradient(top, $startColor, $endColor)
  // Opera 11.10
  background-image: linear-gradient(to bottom, $startColor, $endColor)
  // Standard, IE10
  background-repeat: repeat-x
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#{ie-hex-str($startColor)}', endColorstr='#{ie-hex-str($endColor)}', GradientType=0)
  // IE9 and down

=gradient-directional($startColor: #555555, $endColor: #333333, $deg: 45deg)
  background-color: $endColor
  background-repeat: repeat-x
  background-image: -moz-linear-gradient($deg, $startColor, $endColor)
  // FF 3.6+
  background-image: -webkit-linear-gradient($deg, $startColor, $endColor)
  // Safari 5.1+, Chrome 10+
  background-image: -o-linear-gradient($deg, $startColor, $endColor)
  // Opera 11.10
  background-image: linear-gradient($deg, $startColor, $endColor)
  // Standard, IE10

=gradient-vertical-three-colors($startColor: #00b3ee, $midColor: #7a43b6, $colorStop: 50%, $endColor: #c3325f)
  background-color: mix($midColor, $endColor, 80%)
  background-image: -webkit-gradient(linear, 0 0, 0 100%, from($startColor), color-stop($colorStop, $midColor), to($endColor))
  background-image: -webkit-linear-gradient($startColor, $midColor $colorStop, $endColor)
  background-image: -moz-linear-gradient(top, $startColor, $midColor $colorStop, $endColor)
  background-image: -o-linear-gradient($startColor, $midColor $colorStop, $endColor)
  background-image: linear-gradient($startColor, $midColor $colorStop, $endColor)
  background-repeat: no-repeat
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#{ie-hex-str($startColor)}', endColorstr='#{ie-hex-str($endColor)}', GradientType=0)
  // IE9 and down, gets no color-stop at all for proper fallback

=gradient-radial($innerColor: #555555, $outerColor: #333333)
  background-color: $outerColor
  background-image: -webkit-gradient(radial, center center, 0, center center, 460, from($innerColor), to($outerColor))
  background-image: -webkit-radial-gradient(circle, $innerColor, $outerColor)
  background-image: -moz-radial-gradient(circle, $innerColor, $outerColor)
  background-image: -o-radial-gradient(circle, $innerColor, $outerColor)
  background-repeat: no-repeat

=gradient-striped($color: #555555, $angle: 45deg)
  background-color: $color
  background-image: -webkit-gradient(linear, 0 100%, 100% 0, color-stop(0.25, rgba(255, 255, 255, 0.15)), color-stop(0.25, transparent), color-stop(0.5, transparent), color-stop(0.5, rgba(255, 255, 255, 0.15)), color-stop(0.75, rgba(255, 255, 255, 0.15)), color-stop(0.75, transparent), to(transparent))
  background-image: -webkit-linear-gradient($angle, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent)
  background-image: -moz-linear-gradient($angle, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent)
  background-image: -o-linear-gradient($angle, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent)
  background-image: linear-gradient($angle, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent)

// Reset filters for IE
=reset-filter
  filter: progid:DXImageTransform.Microsoft.gradient(enabled=false)

// COMPONENT MIXINS
// --------------------------------------------------

// Horizontal dividers
// -------------------------
// Dividers (basically an hr) within dropdowns and nav lists
=nav-divider($top: #e5e5e5, $bottom: $white)
  // IE7 needs a set width since we gave a height. Restricting just
  // to IE7 to keep the 1px left/right space in other browsers.
  // It is unclear where IE is getting the extra space that we need
  // to negative-margin away, but so it goes.
  *width: 100%
  height: 1px
  margin: $baseLineHeight / 2 - 1 1px
  // 8px 1px
  *margin: -5px 0 5px
  overflow: hidden
  background-color: $top
  border-bottom: 1px solid $bottom

// Button backgrounds
// ------------------
=buttonBackground($startColor, $endColor, $textColor: white, $textShadow: 0 -1px 0 rgba(0, 0, 0, 0.25))
  // gradientBar will set the background to a pleasing blend of these, to support IE<=9
  +gradientBar($startColor, $endColor, $textColor, $textShadow)
  *background-color: $endColor
  /* Darken IE7 buttons by default so they stand out more given they won't have borders
  +reset-filter
  // in these cases the gradient won't cover the background, so we override
  &:hover, &:active, &.active, &.disabled, &[disabled]
    color: $textColor
    background-color: $endColor
    *background-color: darken($endColor, 5%)
  // IE 7 + 8 can't handle box-shadow to show active, so we darken a bit ourselves
  &:active,
  &.active
    background-color: darken($endColor, 10%) \9

// Navbar vertical align
// -------------------------
// Vertically center elements in the navbar.
// Example: an element has a height of 30px, so write out `.navbarVerticalAlign(30px);` to calculate the appropriate top margin.
=navbarVerticalAlign($elementHeight)
  margin-top: ($navbarHeight - $elementHeight) / 2

// Grid System
// -----------

// Centered container element
=container-fixed
  margin-right: auto
  margin-left: auto
  +clearfix

// Table columns
=tableColumns($columnSpan: 1)
  float: none
  // undo default grid column styles
  width: $gridColumnWidth * $columnSpan + $gridGutterWidth * ($columnSpan - 1) - 16
  // 16 is total padding on left and right of table cells
  margin-left: 0
  // undo default grid column styles

// Make a Grid
// Use .makeRow and .makeColumn to assign semantic layouts grid system behavior
=makeRow
  margin-left: $gridGutterWidth * -1
  +clearfix

=makeColumn($columns: 1, $offset: 0)
  float: left
  margin-left: $gridColumnWidth * $offset + $gridGutterWidth * ($offset - 1) + $gridGutterWidth * 2
  width: $gridColumnWidth * $columns + $gridGutterWidth * ($columns - 1)

// The Grid
=grid-core($gridColumnWidth, $gridGutterWidth)
  .row
    margin-left: $gridGutterWidth * -1
    +clearfix
  [class*="span"]
    float: left
    min-height: 1px
    // prevent collapsing columns
    margin-left: $gridGutterWidth
  // Set the container width, and override it for fixed navbars in media queries
  .container,
  .navbar-static-top .container,
  .navbar-fixed-top .container,
  .navbar-fixed-bottom .container
    +grid-core-span($gridColumns, $gridColumnWidth, $gridGutterWidth)
  // generate .spanX and .offsetX
  +grid-core-span-x($gridColumns, $gridColumnWidth, $gridGutterWidth)
  +grid-core-offset-x($gridColumns, $gridColumnWidth, $gridGutterWidth)

=grid-core-span-x($gridColumns, $gridColumnWidth, $gridGutterWidth)
  @while $gridColumns > 0
    .span#{$gridColumns}
      +grid-core-span($gridColumns, $gridColumnWidth, $gridGutterWidth)
    $gridColumns: $gridColumns - 1

=grid-core-offset-x($gridColumns, $gridColumnWidth, $gridGutterWidth)
  @while $gridColumns > 0
    .offset#{$gridColumns}
      +grid-core-offset($gridColumns, $gridColumnWidth, $gridGutterWidth)
    $gridColumns: $gridColumns - 1

=grid-core-span($columns, $gridColumnWidth, $gridGutterWidth)
  width: $gridColumnWidth * $columns + $gridGutterWidth * ($columns - 1)

=grid-core-offset($columns, $gridColumnWidth, $gridGutterWidth)
  margin-left: $gridColumnWidth * $columns + $gridGutterWidth * ($columns + 1)

=grid-fluid($fluidGridColumnWidth, $fluidGridGutterWidth)
  .row-fluid
    width: 100%
    +clearfix
    [class*="span"]
      +input-block-level
      float: left
      margin-left: $fluidGridGutterWidth
      *margin-left: $fluidGridGutterWidth - 0.5 / $gridRowWidth * 100px * 1%
    [class*="span"]:first-child
      margin-left: 0
    // Space grid-sized controls properly if multiple per line
    .controls-row [class*="span"] + [class*="span"]
      margin-left: $fluidGridGutterWidth
    // generate .spanX and .offsetX
    +grid-fluid-span-x($gridColumns, $fluidGridColumnWidth, $fluidGridGutterWidth)
    +grid-fluid-offset-x($gridColumns, $fluidGridColumnWidth, $fluidGridGutterWidth)

=grid-fluid-span-x($gridColumns, $fluidGridColumnWidth, $fluidGridGutterWidth)
  @while $gridColumns > 0
    .span#{$gridColumns}
      +grid-fluid-span($gridColumns, $fluidGridColumnWidth, $fluidGridGutterWidth)
    $gridColumns: $gridColumns - 1

=grid-fluid-offset-x($gridColumns, $fluidGridColumnWidth, $fluidGridGutterWidth)
  @while $gridColumns > 0
    .offset#{$gridColumns}
      +grid-fluid-offset($gridColumns, $fluidGridColumnWidth, $fluidGridGutterWidth)
    .offset#{$gridColumns}:first-child
      +grid-fluid-offset-first-child($gridColumns, $fluidGridColumnWidth, $fluidGridGutterWidth)
    $gridColumns: $gridColumns - 1

=grid-fluid-span($columns, $fluidGridColumnWidth, $fluidGridGutterWidth)
  width: $fluidGridColumnWidth * $columns + $fluidGridGutterWidth * ($columns - 1)
  *width: $fluidGridColumnWidth * $columns + $fluidGridGutterWidth * ($columns - 1) - 0.5 / $gridRowWidth * 100px * 1%

=grid-fluid-offset($columns, $fluidGridColumnWidth, $fluidGridGutterWidth)
  margin-left: $fluidGridColumnWidth * $columns + $fluidGridGutterWidth * ($columns - 1) + $fluidGridGutterWidth * 2
  *margin-left: $fluidGridColumnWidth * $columns + $fluidGridGutterWidth * ($columns - 1) - 0.5 / $gridRowWidth * 100px * 1% + $fluidGridGutterWidth * 2 - 0.5 / $gridRowWidth * 100px * 1%

=grid-fluid-offset-first-child($columns, $fluidGridColumnWidth, $fluidGridGutterWidth)
  margin-left: $fluidGridColumnWidth * $columns + $fluidGridGutterWidth * ($columns - 1) + $fluidGridGutterWidth
  *margin-left: $fluidGridColumnWidth * $columns + $fluidGridGutterWidth * ($columns - 1) - 0.5 / $gridRowWidth * 100px * 1% + $fluidGridGutterWidth - 0.5 / $gridRowWidth * 100px * 1%

=grid-input($gridColumnWidth, $gridGutterWidth)
  input,
  textarea,
  .uneditable-input
    margin-left: 0
    // override margin-left from core grid system
  // Space grid-sized controls properly if multiple per line
  .controls-row [class*="span"] + [class*="span"]
    margin-left: $gridGutterWidth
  // generate .spanX
  +grid-input-span-x($gridColumns, $gridColumnWidth, $gridGutterWidth)

=grid-input-span-x($gridColumns, $gridColumnWidth, $gridGutterWidth)
  @while $gridColumns > 0
    input.span#{$gridColumns},
    textarea.span#{$gridColumns},
    .uneditable-input.span#{$gridColumns}
      +grid-input-span($gridColumns, $gridColumnWidth, $gridGutterWidth)
    $gridColumns: $gridColumns - 1

=grid-input-span($columns, $gridColumnWidth, $gridGutterWidth)
  width: $gridColumnWidth * $columns + $gridGutterWidth * ($columns - 1) - 14