twbs--bootstrap/scss/_custom-forms.scss

// Embedded icons from Open Iconic.
// Released under MIT and copyright 2014 Waybury.
// http://useiconic.com/open

// Checkboxes and radios
//
// Base class takes care of all the key behavioral aspects.

.c-input {
  position: relative;
  display: inline;
  padding-left: 1.5rem;
  color: #555;
  cursor: pointer;

  > input {
    position: absolute;
    z-index: -1; // Put the input behind the label so it doesn't overlay text
    opacity: 0;

    &:focus ~ .c-indicator {
      @include box-shadow(0 0 0 .075rem #fff, 0 0 0 .2rem #0074d9);
    }

    &:checked ~ .c-indicator {
      color: #fff;
      background-color: #0074d9;
      @include box-shadow(none);
    }

    &:active ~ .c-indicator {
      color: #fff;
      background-color: #84c6ff;
      @include box-shadow(none);
    }
  }

  + .c-input {
    margin-left: 1rem;
  }
}

// Custom indicator
//
// Generates a shadow element to create our makeshift checkbox/radio background.

.c-indicator {
  position: absolute;
  top: 0;
  left: 0;
  display: block;
  width: 1rem;
  height: 1rem;
  font-size: 65%;
  line-height: 1rem;
  color: #eee;
  text-align: center;
  user-select: none;
  background-color: #eee;
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 50% 50%;
  @include box-shadow(inset 0 .125rem .125rem rgba(0,0,0,.1));
}

// Checkboxes
//
// Tweak just a few things for checkboxes.

.c-checkbox {
  .c-indicator {
    border-radius: .25rem;
  }

  input:checked ~ .c-indicator {
    background-image: url(data:image/svg+xml;base64,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);
  }

  input:indeterminate ~ .c-indicator {
    background-color: #0074d9;
    background-image: url(data:image/svg+xml;base64,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);
    @include box-shadow(none);
  }
}

// Radios
//
// Tweak just a few things for radios.

.c-radio {
  .c-indicator {
    border-radius: 50%;
  }

  input:checked ~ .c-indicator {
    background-image: url(data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz4NCjwhLS0gR2VuZXJhdG9yOiBBZG9iZSBJbGx1c3RyYXRvciAxNy4xLjAsIFNWRyBFeHBvcnQgUGx1Zy1JbiAuIFNWRyBWZXJzaW9uOiA2LjAwIEJ1aWxkIDApICAtLT4NCjwhRE9DVFlQRSBzdmcgUFVCTElDICItLy9XM0MvL0RURCBTVkcgMS4xLy9FTiIgImh0dHA6Ly93d3cudzMub3JnL0dyYXBoaWNzL1NWRy8xLjEvRFREL3N2ZzExLmR0ZCI+DQo8c3ZnIHZlcnNpb249IjEuMSIgaWQ9IkxheWVyXzEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgeG1sbnM6eGxpbms9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkveGxpbmsiIHg9IjBweCIgeT0iMHB4Ig0KCSB2aWV3Qm94PSIwIDAgOCA4IiBlbmFibGUtYmFja2dyb3VuZD0ibmV3IDAgMCA4IDgiIHhtbDpzcGFjZT0icHJlc2VydmUiPg0KPHBhdGggZmlsbD0iI0ZGRkZGRiIgZD0iTTQsMUMyLjMsMSwxLDIuMywxLDRzMS4zLDMsMywzczMtMS4zLDMtM1M1LjcsMSw0LDF6Ii8+DQo8L3N2Zz4NCg==);
  }
}

// Layout options
//
// By default radios and checkboxes are `inline-block` with no additional spacing
// set. Use these optional classes to tweak the layout.

.c-inputs-stacked {
  .c-input {
    display: inline;

    &:after {
      display: block;
      margin-bottom: .25rem;
      content: "";
    }

    + .c-input {
      margin-left: 0;
    }
  }
}

// Select
//
// Replaces the browser default select with a custom one.

.select {
  position: relative;
  display: inline-block;
  color: #555;

  > select {
    display: inline-block;
    width: 100%;
    padding: .5rem 2.25rem .5rem 1rem;
    margin: 0;
    line-height: 1.5;
    color: #555;
    cursor: pointer;
    background-color: #eee;
    border: 0;
    border-radius: .25rem;
    outline: 0;
    -webkit-appearance: none;
    appearance: none;

    &:focus {
      box-shadow: 0 0 0 .075rem #fff, 0 0 0 .2rem #0074d9;

      // Undo the Firefox inner focus ring
      &:-moz-focusring {
        color: transparent;
        text-shadow: 0 0 0 #000;
      }
    }

    &:active {
      color: #fff;
      background-color: #0074d9;
    }

    // Hide the arrow in IE10 and up
    &::-ms-expand {
      display: none;
    }
  }

  // Dropdown arrow
  &:after {
    position: absolute;
    top: 50%;
    right: 1.25rem;
    display: inline-block;
    width: 0;
    height: 0;
    margin-top: -.15rem;
    pointer-events: none;
    content: "";
    border-top: .35rem solid;
    border-right: .35rem solid transparent;
    border-bottom: .35rem solid transparent;
    border-left: .35rem solid transparent;
  }
}

// Hover state
// Uncomment if you need it, but be aware of the sticky iOS states.
// .select select:hover {
//   background-color: #ddd;
// }


// Media query to target Firefox only
@-moz-document url-prefix() {
  // Firefox hack to hide the arrow
  .select select {
    padding-right: 1rem;
    text-indent: 0.01px;
    text-overflow: "";
  }

  // <option> elements inherit styles from <select>, so reset them.
  .select option {
    background-color: #fff;
  }
}

// IE9 hack to hide the arrow
@media screen and (min-width:0\0) {
  .select select {
    z-index: 1;
    padding: .5rem 1.5rem .5rem 1rem;
  }
  .select:after {
    z-index: 5;
  }
  .select:before {
    position: absolute;
    top: 0;
    right: 1rem;
    bottom: 0;
    z-index: 2;
    display: block;
    width: 1.5rem;
    content: "";
    background-color: #eee;
  }
  .select select:hover,
  .select select:focus,
  .select select:active {
    color: #555;
    background-color: #eee;
  }
}

// File
//
// Custom file input.

.file {
  position: relative;
  display: inline-block;
  height: 2.5rem;
  cursor: pointer;
}
.file input {
  min-width: 14rem;
  margin: 0;
  filter: alpha(opacity=0);
  opacity: 0;
}
.file-custom {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  z-index: 5;
  height: 2.5rem;
  padding: .5rem 1rem;
  line-height: 1.5;
  color: #555;
  user-select: none;
  background-color: #fff;
  border: .075rem solid #ddd;
  border-radius: .25rem;
  box-shadow: inset 0 .2rem .4rem rgba(0,0,0,.05);
}
.file-custom:after {
  content: "Choose file...";
}
.file-custom:before {
  position: absolute;
  top: -.075rem;
  right: -.075rem;
  bottom: -.075rem;
  z-index: 6;
  display: block;
  height: 2.5rem;
  padding: .5rem 1rem;
  line-height: 1.5;
  color: #555;
  content: "Browse";
  background-color: #eee;
  border: .075rem solid #ddd;
  border-radius: 0 .25rem .25rem 0;
}

// Focus state
.file input:focus ~ .file-custom {
  box-shadow: 0 0 0 .075rem #fff, 0 0 0 .2rem #0074d9;
}