vaadin-framework/themes/src/main/themes/VAADIN/themes/valo/shared/_tooltip.scss

/**
 * The backgound color for tooltips.
 *
 * @type color
 * @group tooltip
 */
$v-tooltip-background-color: rgba(if(is-dark-color($v-background-color), scale-color($v-background-color, $lightness: 80%), scale-color($v-background-color, $lightness: -80%)), .9) !default;

/**
 * The font color for tooltips.
 *
 * @type color
 * @group tooltip
 */
$v-tooltip-font-color: valo-font-color(opacify($v-tooltip-background-color, 1), 1) !default;

/**
 * The font size for tooltips.
 *
 * @type size
 * @group tooltip
 */
$v-tooltip-font-size: max(12px, round($v-font-size * 0.86)) !default;

/**
 * The CSS box shadow for tooltips.
 *
 * @type list
 * @group tooltip
 */
$v-tooltip-box-shadow: 0 2px 12px rgba(#000, .2) !default;

/**
 * The vertical padding for tooltips.
 *
 * @type size
 * @group tooltip
 */
$v-tooltip-padding-vertical: round($v-unit-size/8) !default;

/**
 * The horizontal padding for tooltips.
 *
 * @type size
 * @group tooltip
 */
$v-tooltip-padding-horizontal: round($v-unit-size/4) !default;

/**
 * The backgound color for error tooltips.
 *
 * @type color
 * @group tooltip
 */
$v-tooltip-error-message-background-color: #fff !default;

/**
 * The font color for error tooltips.
 *
 * @type color
 * @group tooltip
 */
$v-tooltip-error-message-font-color: $v-error-indicator-color !default;

/**
 * The corner radius for tooltips.
 *
 * @type size
 * @group tooltip
 */
$v-tooltip-border-radius: $v-border-radius - 1px !default;


/**
 * Outputs the selectors and styles for tooltip elements.
 *
 * @group tooltip
 */
@mixin valo-tooltip {
  .v-tooltip {
    @include valo-tooltip-style;

    div[style*="width"] {
      width: auto !important;
    }

    .v-errormessage {
      background-color: opacify($v-tooltip-error-message-background-color, 1);
      background-color: $v-tooltip-error-message-background-color;
      color: $v-tooltip-error-message-font-color;
      margin: -$v-tooltip-padding-vertical #{-$v-tooltip-padding-horizontal};
      padding: $v-tooltip-padding-vertical $v-tooltip-padding-horizontal;
      max-height: 10em;
      overflow: auto;
      font-weight: $v-font-weight + 100;

      h2:only-child {
        font: inherit;
        line-height: inherit;
      }
    }

    .v-tooltip-text {
      max-height: 10em;
      overflow: auto;
      margin-top: $v-tooltip-padding-vertical * 2;
      pre {
        margin: 0px;
      }
    }

    .v-errormessage[aria-hidden="true"] + .v-tooltip-text {
      margin-top: 0;
    }

    h1,
    h2,
    h3,
    h4 {
      color: inherit;
    }
  }
}

/**
 * Outputs the main styles for tooltip elements.
 *
 * @group tooltip
 */
@mixin valo-tooltip-style {
  background-color: $v-tooltip-background-color;
  @include box-shadow($v-tooltip-box-shadow);
  color: $v-tooltip-font-color;
  padding: $v-tooltip-padding-vertical $v-tooltip-padding-horizontal;
  border-radius: $v-tooltip-border-radius;
  max-width: 35em;
  overflow: hidden !important;
  font-size: $v-tooltip-font-size;
}