// Horizontal gradient, from left to right
// Creates two color stops, start and end, by specifying a color and position for each color stop.
// Color stops are not available in IE9 and below.
.gradient-horizontal(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
    background-image: -webkit-linear-gradient(
      left;
      @start-color @start-percent;
      @end-color @end-percent
); // Safari 5.1-6, Chrome 10+
    background-image: -o-linear-gradient(
      left;
      @start-color @start-percent;
      @end-color @end-percent
); // Opera 12
    background-image: linear-gradient(
      to right;
      @start-color @start-percent;
      @end-color @end-percent
); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
    background-repeat: repeat-x;
    filter: ~"progid:DXImageTransform.Microsoft.gradient(startColorstr='#{color.ie-hex-str(@start-color)}', endColorstr='#{color.ie-hex-str(@end-color)}', GradientType=1)"; // IE9 and down
  }

// Vertical gradient, from top to bottom
// Creates two color stops, start and end, by specifying a color and position for each color stop.
// Color stops are not available in IE9 and below.
.gradient-vertical(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {
    background-image: -webkit-linear-gradient(
      top;
      @start-color @start-percent;
      @end-color @end-percent
); // Safari 5.1-6, Chrome 10+
    background-image: -o-linear-gradient(
      top;
      @start-color @start-percent;
      @end-color @end-percent
); // Opera 12
    background-image: linear-gradient(
      to bottom;
      @start-color @start-percent;
      @end-color @end-percent
); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
    background-repeat: repeat-x;
    filter: ~"progid:DXImageTransform.Microsoft.gradient(startColorstr='#{color.ie-hex-str(@start-color)}', endColorstr='#{color.ie-hex-str(@end-color)}', GradientType=0)"; // IE9 and down
  }

.gradient-directional(@start-color: #555; @end-color: #333; @deg: 45deg) {
    background-repeat: repeat-x;
    background-image: -webkit-linear-gradient(
      @deg;
      @start-color;
      @end-color
); // Safari 5.1-6, Chrome 10+
    background-image: -o-linear-gradient(@deg; @start-color; @end-color); // Opera 12
    background-image: linear-gradient(
      @deg;
      @start-color;
      @end-color
); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+
  }
.gradient-horizontal-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {
    background-image: -webkit-linear-gradient(
      left;
      @start-color;
      @mid-color @color-stop;
      @end-color
);
    background-image: -o-linear-gradient(left; @start-color; @mid-color @color-stop; @end-color);
    background-image: linear-gradient(to right; @start-color; @mid-color @color-stop; @end-color);
    background-repeat: no-repeat;
    filter: ~"progid:DXImageTransform.Microsoft.gradient(startColorstr='#{color.ie-hex-str(@start-color)}', endColorstr='#{color.ie-hex-str(@end-color)}', GradientType=1)"; // IE9 and down, gets no color-stop at all for proper fallback
  }
.gradient-vertical-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {
    background-image: -webkit-linear-gradient(@start-color; @mid-color @color-stop; @end-color);
    background-image: -o-linear-gradient(@start-color; @mid-color @color-stop; @end-color);
    background-image: linear-gradient(@start-color; @mid-color @color-stop; @end-color);
    background-repeat: no-repeat;
    filter: ~"progid:DXImageTransform.Microsoft.gradient(startColorstr='#{color.ie-hex-str(@start-color)}', endColorstr='#{color.ie-hex-str(@end-color)}', GradientType=0)"; // IE9 and down, gets no color-stop at all for proper fallback
  }
.gradient-radial(@inner-color: #555; @outer-color: #333) {
    background-image: -webkit-radial-gradient(circle; @inner-color; @outer-color);
    background-image: radial-gradient(circle; @inner-color; @outer-color);
    background-repeat: no-repeat;
  }
.gradient-striped(@color: rgba(255,255,255,0.15); @angle: 45deg) {
    background-image: -webkit-linear-gradient(
      @angle;
      @color 25%,
      transparent 25%,
      transparent 50%;
      @color 50%;
      @color 75%,
      transparent 75%,
      transparent
);
    background-image: -o-linear-gradient(
      @angle;
      @color 25%,
      transparent 25%,
      transparent 50%;
      @color 50%;
      @color 75%,
      transparent 75%,
      transparent
);
    background-image: linear-gradient(
      @angle;
      @color 25%,
      transparent 25%,
      transparent 50%;
      @color 50%;
      @color 75%,
      transparent 75%,
      transparent
);
}