/*!
 * # Fomantic-UI - Loader
 * http://github.com/fomantic/Fomantic-UI/
 *
 *
 * Released under the MIT license
 * http://opensource.org/licenses/MIT
 *
 */
/*******************************
            Theme
*******************************/

@type    : 'element';
@element : 'placeholder';

@import (multiple) '../../theme.config';

/*-------------------
      Content
--------------------*/

.ui.placeholder {
  position: static;
  overflow: hidden;
  animation: placeholderShimmer @placeholderLoadingAnimationDuration linear;
  animation-iteration-count: infinite;
  background-color: @white;
  background-image: @placeholderLoadingGradient;
  background-size: @placeholderLoadingGradientWidth 100%;
  max-width: @placeholderMaxWidth;
}

@keyframes placeholderShimmer{
  0% {
    background-position: -@placeholderLoadingGradientWidth 0
  }
  100% {
    background-position: @placeholderLoadingGradientWidth 0
  }
}

.ui.placeholder + .ui.placeholder {
  margin-top: @consecutivePlaceholderSpacing;
}
.ui.placeholder + .ui.placeholder {
  animation-delay: @placeholderAnimationInterval;
}
.ui.placeholder + .ui.placeholder + .ui.placeholder {
  animation-delay: (@placeholderAnimationInterval * 2);
}
.ui.placeholder + .ui.placeholder + .ui.placeholder + .ui.placeholder {
  animation-delay: (@placeholderAnimationInterval * 3);
}
.ui.placeholder + .ui.placeholder + .ui.placeholder + .ui.placeholder + .ui.placeholder {
  animation-delay: (@placeholderAnimationInterval * 4);
}

.ui.placeholder,
.ui.placeholder > :before,
.ui.placeholder .image.header:after,
.ui.placeholder .line,
.ui.placeholder .line:after {
  background-color: @white;
}

.ui.placeholder.hidden {
  display:none;
}

& when (@variationPlaceholderImage) {
  /* Image */
  .ui.placeholder .image:not(.header):not(.ui):not(.icon) {
    height: @placeholderImageHeight;
  }
  .ui.placeholder .square.image:not(.header) {
    height: 0;
    overflow: hidden;
    /* 1/1 aspect ratio */
    padding-top: 100%;
  }
  .ui.placeholder .rectangular.image:not(.header) {
    height: 0;
    overflow: hidden;
    /* 4/3 aspect ratio */
    padding-top: 75%;
  }
}

& when (@variationPlaceholderLine) or (@variationPlaceholderHeader) {
  /* Lines */
  .ui.placeholder .line {
    position: relative;
    height: @placeholderLineMargin;
  }
  .ui.placeholder .line:before,
  .ui.placeholder .line:after {
    top: 100%;
    position: absolute;
    content: '';
    background-color: inherit;
  }
  .ui.placeholder .line:before {
    left: 0;
  }
  .ui.placeholder .line:after {
    right: 0;
  }

  /* Any Lines */
  .ui.placeholder .line {
    margin-bottom: @placeholderLineHeight;
  }
  .ui.placeholder .line:before,
  .ui.placeholder .line:after {
    height: @placeholderLineHeight;
  }
  .ui.placeholder .line:not(:first-child) {
    margin-top: @placeholderLineHeight;
  }

  /* Line Outdent */
  .ui.placeholder .line:nth-child(1):after {
    width: @placeholderLineOneOutdent;
  }
  .ui.placeholder .line:nth-child(2):after {
    width: @placeholderLineTwoOutdent;
  }
  .ui.placeholder .line:nth-child(3):after {
    width: @placeholderLineThreeOutdent;
  }
  .ui.placeholder .line:nth-child(4):after {
    width: @placeholderLineFourOutdent;
  }
  .ui.placeholder .line:nth-child(5):after {
    width: @placeholderLineFiveOutdent;
  }
}

& when (@variationPlaceholderHeader) {
  /* Header Image + 2 Lines */
  .ui.placeholder .header {
    position: relative;
    overflow: hidden;
  }
  /* Header Line 1 & 2*/
  .ui.placeholder .header .line {
    margin-bottom: @placeholderHeaderLineHeight;
  }
  .ui.placeholder .header .line:before,
  .ui.placeholder .header .line:after {
    height: @placeholderHeaderLineHeight;
  }
  .ui.placeholder .header .line:not(:first-child) {
    margin-top: @placeholderHeaderLineHeight;
  }
  .ui.placeholder .header .line:after {
    width: @placeholderHeaderLineOneOutdent;
  }
  .ui.placeholder .header .line:nth-child(2):after {
    width: @placeholderHeaderLineTwoOutdent;
  }

  & when (@variationPlaceholderImage) {
    /* Image Header */
    .ui.placeholder .image.header .line {
      margin-left: @placeholderImageWidth;
    }
    .ui.placeholder .image.header .line:before {
      width: @placeholderImageTextIndent;
    }
    .ui.placeholder .image.header:after {
      display: block;
      height: @placeholderLineMargin;
      content: '';
      margin-left: @placeholderImageWidth;
    }
  }
}

/* Spacing */
.ui.placeholder .image .line:first-child,
.ui.placeholder .paragraph .line:first-child,
.ui.placeholder .header .line:first-child {
  height: 0.01px;
}
.ui.placeholder .image:not(:first-child):before,
.ui.placeholder .paragraph:not(:first-child):before,
.ui.placeholder .header:not(:first-child):before {
  height: @placeholderSpacing;
  content: '';
  display: block;
}

& when (@variationPlaceholderInverted) {
  /* Inverted Content Loader */
  .ui.inverted.placeholder {
    background-image: @placeholderInvertedLoadingGradient;
  }
  .ui.inverted.placeholder,
  .ui.inverted.placeholder > :before,
  .ui.inverted.placeholder .image.header:after,
  .ui.inverted.placeholder .line,
  .ui.inverted.placeholder .line:after {
    background-color: @black;
  }
}

/*******************************
            Variations
*******************************/


/*-------------------
        Sizes
--------------------*/
& when (@variationPlaceholderLengths) {
  .ui.placeholder .full.line.line.line:after {
    width: @placeholderFullLineOutdent;
  }
  .ui.placeholder .very.long.line.line.line:after {
    width: @placeholderVeryLongLineOutdent;
  }
  .ui.placeholder .long.line.line.line:after {
    width: @placeholderLongLineOutdent;
  }
  .ui.placeholder .medium.line.line.line:after {
    width: @placeholderMediumLineOutdent;
  }
  .ui.placeholder .short.line.line.line:after {
    width: @placeholderShortLineOutdent;
  }
  .ui.placeholder .very.short.line.line.line:after {
    width: @placeholderVeryShortLineOutdent;
  }
}

& when (@variationPlaceholderFluid) {
  /*-------------------
          Fluid
  --------------------*/

  .ui.fluid.placeholder {
    max-width: none;
  }
}

.loadUIOverrides();