text: const css = `
  .bk-root .bk-tabs-header {
    display: flex;
    display: -webkit-flex;
    flex-wrap: nowrap;
    -webkit-flex-wrap: nowrap;
    align-items: center;
    -webkit-align-items: center;
    overflow: hidden;
    user-select: none;
    -ms-user-select: none;
    -moz-user-select: none;
    -webkit-user-select: none;
  }
  .bk-root .bk-tabs-header .bk-btn-group {
    height: auto;
    margin-right: 5px;
  }
  .bk-root .bk-tabs-header .bk-btn-group > .bk-btn {
    flex-grow: 0;
    -webkit-flex-grow: 0;
    height: auto;
    padding: 4px 4px;
  }
  .bk-root .bk-tabs-header .bk-headers-wrapper {
    flex-grow: 1;
    -webkit-flex-grow: 1;
    overflow: hidden;
    color: #666666;
  }
  .bk-root .bk-tabs-header.bk-above .bk-headers-wrapper {
    border-bottom: 1px solid #e6e6e6;
  }
  .bk-root .bk-tabs-header.bk-right .bk-headers-wrapper {
    border-left: 1px solid #e6e6e6;
  }
  .bk-root .bk-tabs-header.bk-below .bk-headers-wrapper {
    border-top: 1px solid #e6e6e6;
  }
  .bk-root .bk-tabs-header.bk-left .bk-headers-wrapper {
    border-right: 1px solid #e6e6e6;
  }
  .bk-root .bk-tabs-header.bk-above,
  .bk-root .bk-tabs-header.bk-below {
    flex-direction: row;
    -webkit-flex-direction: row;
  }
  .bk-root .bk-tabs-header.bk-above .bk-headers,
  .bk-root .bk-tabs-header.bk-below .bk-headers {
    flex-direction: row;
    -webkit-flex-direction: row;
  }
  .bk-root .bk-tabs-header.bk-left,
  .bk-root .bk-tabs-header.bk-right {
    flex-direction: column;
    -webkit-flex-direction: column;
  }
  .bk-root .bk-tabs-header.bk-left .bk-headers,
  .bk-root .bk-tabs-header.bk-right .bk-headers {
    flex-direction: column;
    -webkit-flex-direction: column;
  }
  .bk-root .bk-tabs-header .bk-headers {
    position: relative;
    display: flex;
    display: -webkit-flex;
    flex-wrap: nowrap;
    -webkit-flex-wrap: nowrap;
    align-items: center;
    -webkit-align-items: center;
  }
  .bk-root .bk-tabs-header .bk-tab {
    padding: 4px 8px;
    border: solid transparent;
    white-space: nowrap;
    cursor: pointer;
  }
  .bk-root .bk-tabs-header .bk-tab:hover {
    background-color: #f2f2f2;
  }
  .bk-root .bk-tabs-header .bk-tab.bk-active {
    color: #4d4d4d;
    background-color: white;
    border-color: #e6e6e6;
  }
  .bk-root .bk-tabs-header .bk-tab .bk-close {
    margin-left: 10px;
  }
  .bk-root .bk-tabs-header.bk-above .bk-tab {
    border-width: 3px 1px 0px 1px;
    border-radius: 4px 4px 0 0;
  }
  .bk-root .bk-tabs-header.bk-right .bk-tab {
    border-width: 1px 3px 1px 0px;
    border-radius: 0 4px 4px 0;
  }
  .bk-root .bk-tabs-header.bk-below .bk-tab {
    border-width: 0px 1px 3px 1px;
    border-radius: 0 0 4px 4px;
  }
  .bk-root .bk-tabs-header.bk-left .bk-tab {
    border-width: 1px 0px 1px 3px;
    border-radius: 4px 0 0 4px;
  }
  .bk-root .bk-close {
    display: inline-block;
    width: 10px;
    height: 10px;
    vertical-align: middle;
    background-image: url('data:image/svg+xml;utf8,\
        <svg viewPort="0 0 10 10" version="1.1" xmlns="http://www.w3.org/2000/svg">\
          <line x1="1" y1="9" x2="9" y2="1" stroke="gray" stroke-width="2"/>\
          <line x1="1" y1="1" x2="9" y2="9" stroke="gray" stroke-width="2"/>\
        </svg>');
  }
  .bk-root .bk-close:hover {
    background-image: url('data:image/svg+xml;utf8,\
        <svg viewPort="0 0 10 10" version="1.1" xmlns="http://www.w3.org/2000/svg">\
          <line x1="1" y1="9" x2="9" y2="1" stroke="red" stroke-width="2"/>\
          <line x1="1" y1="1" x2="9" y2="9" stroke="red" stroke-width="2"/>\
        </svg>');
  }
  `;
  export default css;
  