mdb-ui-kit/sass/_inputs.scss

// This file has been autogenerated by grunt task lessToSass. Any changes will be overwritten.

@import '_inputs-size';

// usage: @include form-group-validation-state($input-danger);
@mixin form-group-validation-state($name, $color){

  &.#{$name} { // e.g. has-error
    .form-control {
      box-shadow: none;
    }
    &.is-focused .form-control {
      background-image: linear-gradient($color, $color), linear-gradient($input-underline-color, $input-underline-color);
    }
    label.control-label,
    .help-block {
      color: $color;
    }
  }
}

.form-control {
  border: 0;
  background-image: linear-gradient($primary, $primary), linear-gradient($input-underline-color, $input-underline-color);
  background-size: 0 2px, 100% 1px;
  background-repeat: no-repeat;
  background-position: center bottom, center calc(100% - 1px);
  background-color: rgba(0, 0, 0, 0);
  transition: background 0s ease-out;

  .form-group.is-focused & {
    outline: none;
    background-image: linear-gradient($primary, $primary), linear-gradient($input-underline-color, $input-underline-color);
    background-size: 100% 2px, 100% 1px;
    box-shadow: none;
    transition-duration: 0.3s;

    .material-input:after {
      background-color: $input-default;
    }
  }

  &,
  fieldset[disabled] & {

    &:textarea {
      height: 40px;
    }

    &,
    .form-group.is-focused & {
      float: none;
      border: 0;
      box-shadow: none;
      border-radius: 0;
      &:disabled {
        border-style: dashed;
        border-bottom: 1px solid #757575;
      }
    }
  }

  &[disabled],
  &[readonly],
  fieldset[disabled] & {
    //background-color: transparent;
    background-color: rgba(0, 0, 0, 0);
  }
}

@mixin form-group-size-variant($placeholder-font-size, $vertical-padding, $line-height, $label-as-placeholder-shim){
  $static-font-size: ceil(($floating-label-size-ratio * $placeholder-font-size)) !default;
  $static-line-height: ($floating-label-size-ratio * $line-height) !default;

  $label-as-placeholder-top: -1 * ($vertical-padding + $label-as-placeholder-shim) !default;
  //$label-as-placeholder-top: -1 * ($line-height * $static-font-size) !default; way too much on anything but sm

  $help-block-font-size: ceil(($help-block-size-ratio * $placeholder-font-size)) !default;
  $help-block-line-height: ($help-block-size-ratio * $line-height) !default;

  .form-control {
    @include material-placeholder {
      font-size: $placeholder-font-size;
    
}
    margin-bottom: $vertical-padding;

    //border: 1px solid;
  }

  .help-block {
    margin-top: 0px; // allow the input margin to set-off the top of the help-block
    font-size: $help-block-font-size;

    //border: 1px solid;
  }

  label.control-label { // static label
    font-size: $static-font-size; // static (smaller of the two)
    line-height: $static-line-height;
    &.floating-label {
      top: $label-as-placeholder-top; // place the floating label to look like a placeholder with input padding
      font-size: $placeholder-font-size; // as placeholder (full size)
      line-height: $line-height;
    }

    //border: 1px solid;
  }

  // sizing of focused/open/labels
  &.is-focused,
  &:not(.is-empty) {
    label.control-label.floating-label {
      top: $label-as-placeholder-top - ($placeholder-font-size + $vertical-padding);
      font-size: $static-font-size;
      line-height: $static-line-height;
    }
  }
}

.form-group {
  position: relative;

  // ----
  // Placeholders and and floating-labels should look the same
  .form-control {
    @include material-placeholder {
      color: $input-placeholder-color;
      font-weight: normal;
    
}
  }

  // -----
  // Labels
  //
  // Reference http://www.google.com/design/spec/components/text-fields.html
  // MDL implementation: http://www.getmdl.io/components/index.html#textfields-section

  label.control-label { // static label

    // same label properties as form-group placeholder.  could be shared with a ruleset but makes sass conversion painful
    color: $input-placeholder-color;
    font-weight: normal;
    margin: 16px 0 0 0; // std and lg

    &.floating-label {
      position: absolute;
      pointer-events: none;
      left: 0px;
      transition: 0.3s ease all;
    }
  }
  @include variations(unquote(" label.control-label"), color, $input-placeholder-color);  // default label color variations
  @include variations(unquote(".is-focused label.control-label"), color, $input-default); // focused label color variations

  // default floating size/location
  @include form-group-size-variant($md-input-font-size-base, $md-input-padding-base-vertical, $md-input-line-height-base, $md-label-as-placeholder-shim-base);

  // sm floating size/location
  &.form-group-sm {
    @include form-group-size-variant($md-input-font-size-small, $md-input-padding-small-vertical, $md-input-line-height-small, $md-label-as-placeholder-shim-small);
  }

  // lg floating size/location
  &.form-group-lg {
    @include form-group-size-variant($md-input-font-size-large, $md-input-padding-large-vertical, $md-input-line-height-large, $md-label-as-placeholder-shim-large);
  }

  // Hints
  .help-block {
    position: absolute;
    display: none;
  }

  &.is-focused {
    .help-block {
      display: block;
    }
  }

  // SASS conversion note: please mirror any content change in _mixins-shared.scss bg-img-variations-content
  @include bg-img-variations(unquote(".is-focused .form-control"), $primary);

  @include form-group-validation-state(has-warning, $input-warning);
  @include form-group-validation-state(has-error, $input-danger);
  @include form-group-validation-state(has-success, $input-success);
  @include form-group-validation-state(has-info, $input-info);

  textarea {
    resize: none;
  }
  textarea ~ .form-control-highlight {
    margin-top: -11px;
  }

  select ~ .material-input:after {
    display: none;
  }

  // Fix for OS X
  select {
    appearance: none;
  }
}

select.form-control {

  border: 0;
  box-shadow: none;
  border-radius: 0;

  .form-group.is-focused & {
    box-shadow: none;
    border-color: #757575;
  }

  &[multiple] {
    &,
    .form-group.is-focused & {
      height: 85px;
    }
  }
}

@mixin input-group-button-variation($vertical-padding){
  .input-group-btn {
    .btn {
      margin: 0 0 $vertical-padding 0;
    }
  }
}

// ----------------
// input group/addon related styles

// default margin
@include input-group-button-variation($md-input-padding-base-vertical);

.form-group {
  //.form-control {
  //  float: none;
  //}

  // sm margin
  &.form-group-sm {
    @include input-group-button-variation($md-input-padding-small-vertical);
  }

  // lg margin
  &.form-group-lg {
    @include input-group-button-variation($md-input-padding-large-vertical);
  }
}

.input-group {  // may be in or outside of form-group
  .input-group-btn {
    padding: 0 12px; // match addon spacing
  }

  .input-group-addon {
    border: 0;
    background: transparent;
  }
}

// Input files (kinda hack)
.form-group input[type=file] {
  opacity: 0;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 100;
}

// Ugly override of Bootstrap border
fieldset[disabled] .form-control:disabled,
.form-group .form-control:disabled,
.form-control:disabled,
fieldset[disabled] .form-control:focus:disabled,
.form-group .form-control:focus:disabled,
.form-control:focus:disabled,
.form-group.is-focused fieldset[disabled] .form-control:disabled,
.form-group.is-focused .form-group .form-control:disabled,
.form-group.is-focused .form-control:disabled {
  border: 0;
}