tabler/scss/vendor/_selectize.scss

.selectize-control {
  padding: 0;
  border: 0;
}

.selectize-input {
  border: 1px solid $border-color;
  padding: $input-padding-y $input-padding-x;
  font-size: $input-font-size;
  box-shadow: none;
  line-height: $input-line-height;

  .selectize-control.single & {
    background: $form-select-bg escape-svg($form-select-indicator) $form-select-background;
  }

  &.focus {
    border-color: $form-select-focus-border-color;
    box-shadow: $form-select-focus-box-shadow;
  }

  &:after {
    content: none !important;
  }
}

.selectize-dropdown {
  height: auto;
  background: $form-select-bg;
  padding: $input-padding-y 0;
  margin-top: 1px;

  .option,
  .option-header {
    padding: .25rem $input-padding-x;
  }

  .active {
    background: $hover-bg;
    color: inherit;
    cursor: pointer;
  }
}