frontend/src/static/icons/css/fontello.css

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

@font-face {
  font-family: 'fontello';
  src: url('../font/fontello.eot?12833378');
  src: url('../font/fontello.eot?12833378#iefix') format('embedded-opentype'),
       url('../font/fontello.woff2?12833378') format('woff2'),
       url('../font/fontello.woff?12833378') format('woff'),
       url('../font/fontello.ttf?12833378') format('truetype'),
       url('../font/fontello.svg?12833378#fontello') format('svg');
  font-weight: normal;
  font-style: normal;
}
/* Chrome hack: SVG is rendered more smooth in Windozze. 100% magic, uncomment if you need it. */
/* Note, that will break hinting! In other OS-es font will be not as sharp as it could be */
/*
@media screen and (-webkit-min-device-pixel-ratio:0) {
  @font-face {
    font-family: 'fontello';
    src: url('../font/fontello.svg?12833378#fontello') format('svg');
  }
}
*/

 [class^="icon-"]:before, [class*=" icon-"]:before {
  font-family: "fontello";
  font-style: normal;
  font-weight: normal;
  speak: never;

  display: inline-block;
  text-decoration: inherit;
  width: 1em;
  margin-right: .2em;
  text-align: center;
  /* opacity: .8; */

  /* For safety - reset parent styles, that can break glyph codes*/
  font-variant: normal;
  text-transform: none;

  /* fix buttons height, for twitter bootstrap */
  line-height: 1em;

  /* Animation center compensation - margins should be symmetric */
  /* remove if not needed */
  margin-left: .2em;

  /* you can be more comfortable with increased icons size */
  /* font-size: 120%; */

  /* Font smoothing. That was taken from TWBS */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  /* Uncomment for 3D effect */
  /* text-shadow: 1px 1px 1px rgba(127, 127, 127, 0.3); */
}

.icon-eraser:before { content: '\e800'; }
.icon-filter:before { content: '\e801'; font-size: 24px; }
.icon-graph:before { content: '\e802'; }
.icon-play:before { content: '\e803'; font-size: 30px; }
.icon-close-session:before { content: '\e804'; font-size: 30px; color: #142B80; }
.icon-refresh:before { content: '\e805'; font-size: 30px; color: #18CCC5; }
.icon-search-cancel:before { content: '\e806'; font-size: 24px; }
.icon-edge-weight:before { content: '\e807'; font-size: 24px;}