// Forms
.form-group {
  &:not(:last-child) {
    margin-bottom: @layout-spacing;
  }
}

fieldset {
  margin-bottom: @layout-spacing-lg;
}

legend {
  font-size: @font-size-lg;
  font-weight: 500;
  margin-bottom: @layout-spacing-lg;
}

// Form element: Label
.form-label {
  display: block;
  padding: @control-padding-v + @border-width 0;

  &.label-sm {
    padding: @control-padding-v-sm + @border-width 0;
  }

  &.label-lg {
    padding: @control-padding-v-lg + @border-width 0;
  }
}

// Form element: Input
.form-input {
  appearance: none;
  background: @bg-color-light;
  background-image: none;
  border: @border-width solid @border-color-dark;
  border-radius: @border-radius;
  color: @body-font-color;
  .control-transition();
  display: block;
  font-size: @font-size;
  height: @control-size;
  line-height: @line-height;
  max-width: 100%;
  outline: none;
  padding: @control-padding-v @control-padding-h;
  position: relative;
  width: 100%;
  &:focus {
    border-color: @primary-color;
    .control-shadow();
  }
  &::placeholder {
    color: @gray-color;
  }

  // Input sizes
  &.input-sm {
    font-size: @font-size-sm;
    height: @control-size-sm;
    padding: @control-padding-v-sm @control-padding-h;
  }

  &.input-lg {
    font-size: @font-size-lg;
    height: @control-size-lg;
    padding: @control-padding-v-lg @control-padding-h;
  }

  &.input-inline {
    display: inline-block;
    vertical-align: middle;
    width: auto;
  }

  // Textarea
  textarea& {
    height: auto;
  }

  // Input types
  &[type="file"] {
    padding: .125rem;
  }
}

// Form element: Input hint
.form-input-hint {
  color: @gray-color;
  font-size: @font-size-sm;
  margin-top: @unit-1;

  .has-success &,
  .is-success + & {
    color: @control-color-success;
  }

  .has-error &,
  .is-error + & {
    color: @control-color-error;
  }
}

// Form element: Select
.form-select {
  appearance: none;
  border: @border-width solid @border-color-dark;
  border-radius: @border-radius;
  color: inherit;
  font-size: @font-size;
  height: @control-size;
  line-height: @line-height;
  outline: none;
  padding: @control-padding-v @control-padding-h;
  vertical-align: middle;
  width: 100%;

  &[size],
  &[multiple] {
    height: auto;
    
    option {
      padding: @unit-h @unit-1;
    }
  }
  &:not([multiple]):not([size]) {
    background: @bg-color-light url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 4 5'%3E%3Cpath fill='%23667189' d='M2 0L0 2h4zm0 5L0 3h4z'/%3E%3C/svg%3E") no-repeat right (@control-icon-size / 2) center / .4rem .5rem;
    padding-right: @control-icon-size + @control-padding-h;
  }
  &:focus {
    border-color: @primary-color;
    .control-shadow();
  }
  &::-ms-expand {
    display: none;
  }

  // Select sizes
  &.select-sm {
    font-size: @font-size-sm;
    height: @control-size-sm;
    padding: @control-padding-v-sm (@control-icon-size + @control-padding-h) @control-padding-v-sm @control-padding-h;
  }

  &.select-lg {
    font-size: @font-size-lg;
    height: @control-size-lg;
    padding: @control-padding-v-lg (@control-icon-size + @control-padding-h) @control-padding-v-lg @control-padding-h;
  }
}

// Form Icons
.has-icon-left,
.has-icon-right {
  position: relative;

  .form-icon {
    height: @control-icon-size;
    margin: 0 @control-padding-v;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: @control-icon-size;
  }
}

.has-icon-left {
  .form-icon {
    left: @border-width;
  }

  .form-input {
    padding-left: @control-icon-size + @control-padding-v * 2;
  }
}

.has-icon-right {
  .form-icon {
    right: @border-width;
  }

  .form-input {
    padding-right: @control-icon-size + @control-padding-v * 2;
  }
}

// Form element: Checkbox and Radio
.form-checkbox,
.form-radio,
.form-switch {
  display: inline-block;
  line-height: @line-height;
  padding: (@control-size-sm - @line-height) / 2  (@control-icon-size + @control-padding-h);
  position: relative;

  input {
    clip: rect(0, 0, 0, 0);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    position: absolute;
    width: 1px;
    &:focus + .form-icon {
      border-color: @primary-color;
      .control-shadow();
    }
    &:checked + .form-icon {
      background: @primary-color;
      border-color: @primary-color;
    }
  }

  .form-icon {
    border: @border-width solid @border-color-dark;
    .control-transition();
    cursor: pointer;
    display: inline-block;
    position: absolute;
  }
}

.form-checkbox,
.form-radio {
  .form-icon {
    background: @bg-color-light;
    height: @control-icon-size;
    left: 0;
    top: (@control-size-sm - @control-icon-size) / 2;
    width: @control-icon-size;
  }

  input {
    &:active + .form-icon {
      background: @bg-color-dark;
    }
  }
}
.form-checkbox {
  .form-icon {
    border-radius: @border-radius;
  }

  input {
    &:checked + .form-icon {
      &::before {
        background-clip: padding-box;
        border: @border-width-lg solid @light-color;
        border-left-width: 0;
        border-top-width: 0;
        content: "";
        height: 10px;
        left: 50%;
        margin-left: -3px;
        margin-top: -6px;
        position: absolute;
        top: 50%;
        transform: rotate(45deg);
        width: 6px;
      }
    }
    &:indeterminate + .form-icon {
      background: @primary-color;
      border-color: @primary-color;
      &::before {
        background: @bg-color-light;
        content: "";
        height: 2px;
        left: 50%;
        margin-left: -5px;
        margin-top: -1px;
        position: absolute;
        top: 50%;
        width: 10px;
      }
    }
  }
}
.form-radio {
  .form-icon {
    border-radius: @control-icon-size / 2;
  }

  input {
    &:checked + .form-icon {
      &::before {
        background: @bg-color-light;
        border-radius: @border-radius;
        content: "";
        height: 4px;
        left: 50%;
        margin-left: -2px;
        margin-top: -2px;
        position: absolute;
        top: 50%;
        width: 4px;
      }
    }
  }
}

// Form element: Switch
.form-switch {
  padding-left: (@unit-8 + @control-padding-h);

  .form-icon {
    background: @gray-color-light;
    background-clip: padding-box;
    border-radius: @unit-2 + @border-width;
    height: @unit-4 + @border-width * 2;
    left: 0;
    top: (@control-size-sm - @unit-4) / 2 - @border-width;
    width: @unit-8;
    &::before {
      background: @bg-color-light;
      border-radius: @unit-2;
      content: "";
      display: block;
      height: @unit-4;
      left: 0;
      position: absolute;
      top: 0;
      .control-transition();
      width: @unit-4;
    }
  }

  input {
    &:checked + .form-icon {
      &::before {
        left: 14px;
      }
    }
    &:active + .form-icon {
      &::before {
        background: @bg-color;
      }
    }
  }
}

// Form element: Input groups
.input-group {
  display: flex;

  .input-group-addon {
    background: @bg-color;
    border: @border-width solid @border-color-dark;
    border-radius: @border-radius;
    line-height: @line-height;
    padding: @control-padding-v @control-padding-h;

    &.addon-sm {
      font-size: @font-size-sm;
      padding: @control-padding-v-sm @control-padding-h;
    }
    &.addon-lg {
      font-size: @font-size-lg;
      padding: @control-padding-v-lg @control-padding-h;
    }
  }
  .input-group-addon,
  .input-group-btn {
    flex: 1 0 auto;
  }

  .form-input,
  .form-select,
  .input-group-addon,
  .input-group-btn {
    &:first-child:not(:last-child) {
      border-bottom-right-radius: 0;
      border-top-right-radius: 0;
    }
    &:not(:first-child):not(:last-child) {
      border-radius: 0;
      margin-left: -@border-width;
    }
    &:last-child:not(:first-child) {
      border-bottom-left-radius: 0;
      border-top-left-radius: 0;
      margin-left: -@border-width;
    }
    &:focus {
      z-index: @zindex-0;
    }
  }

  .form-select {
    width: auto;
  }

  &.input-inline {
    display: inline-flex;
  }
}

// Form validation states
.form-input,
.form-select {
  .has-success &,
  &.is-success {
    border-color: @control-color-success;
    &:focus {
      .control-shadow(@control-color-success);
    }
  }

  .has-error &,
  &.is-error {
    border-color: @control-color-error;
    &:focus {
      .control-shadow(@control-color-error);
    }
  }
}

.form-checkbox,
.form-radio,
.form-switch {
  .has-error &,
  &.is-error {
    .form-icon {
      border-color: @control-color-error;
    }
    
    input {
      &:checked + .form-icon {
        background: @control-color-error;
        border-color: @control-color-error;
      }

      &:focus + .form-icon {
        border-color: @control-color-error;
        .control-shadow(@control-color-error);
      }
    }
  }
}

// validation based on :placeholder-shown (Edge doesn't support it yet)
.form-input {
  &:not(:placeholder-shown) {
    &:invalid {
      border-color: @control-color-error;
      &:focus {
        .control-shadow(@control-color-error);
      }

      & + .form-input-hint {
        color: @control-color-error;
      }
    }
  }
}

// Form disabled and readonly
.form-input,
.form-select {
  &:disabled,
  &.disabled {
    background-color: @bg-color-dark;
    cursor: not-allowed;
    opacity: .5;
  }
}

.form-input {
  &[readonly] {
    background-color: @bg-color;
  }
}

input {
  &:disabled,
  &.disabled {
    & + .form-icon {
      background: @bg-color-dark;
      cursor: not-allowed;
      opacity: .5;
    }
  }
}

.form-switch {
  input {
    &:disabled,
    &.disabled {
      & + .form-icon::before {
        background: @bg-color-light;
      }
    }
  }
}

// Form Horizontal
.form-horizontal {
  padding: @layout-spacing;

  .form-group {
    display: flex;
  }

  .form-checkbox,
  .form-radio,
  .form-switch {
    margin: (@control-size - @control-size-sm) / 2 0;
  }
}