@jupyter-widgets/base/css/index.css

Jupyter interactive widgets

/* Copyright (c) Jupyter Development Team.
 * Distributed under the terms of the Modified BSD License.
 */

.jupyter-widgets-disconnected::before {
  content: '\f127'; /* chain-broken */
  display: inline-block;
  font: normal normal 900 14px/1 'Font Awesome 5 Free', 'FontAwesome';
  text-rendering: auto;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: #d9534f;
  padding: 3px;
  align-self: flex-start;
}

.jupyter-widgets-error-widget {
  display: flex;
  flex-direction: column;
  justify-content: center;
  height: 100%;
  border: solid 1px red;
  margin: 0 auto;
}

.jupyter-widgets-error-widget.icon-error {
  min-width: var(--jp-widgets-inline-width-short);
}
.jupyter-widgets-error-widget.text-error {
  min-width: calc(2 * var(--jp-widgets-inline-width));
  min-height: calc(3 * var(--jp-widgets-inline-height));
}

.jupyter-widgets-error-widget p {
  text-align: center;
}

.jupyter-widgets-error-widget.text-error pre::first-line {
  font-weight: bold;
}