matrix-dimension/web/app/widget-wrappers/jitsi/jitsi.component.scss

// component styles are encapsulated and only applied to their components
@import "../../../style/themes/themes";

@include themifyComponent() {
  #jitsiContainer {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    display: none;
  }

  .join-conference-wrapper {
    display: table;
    position: absolute;
    height: 100%;
    width: 100%;
    background-color: themed(jitsiWelcomeBgColor);
  }

  .join-conference-boat {
    display: table-cell;
    vertical-align: middle;
  }

  .join-conference-prompt {
    margin-left: auto;
    margin-right: auto;
    width: 90%;
    text-align: center;
  }
}