:root {
  --panel-width: 175px;
  --transition-duration: 0.3s;
  --transition-timing: cubic-bezier(0.16, 1, 0.3, 1);
  }

  html,
  body {
  margin: 0;
  padding: 0;
  height: 100%;
  }

  body.no-scroll {
  overflow: hidden;
  }

  body.allow-scroll {
  overflow: auto;
  }

  .container {
  display: flex;
  flex-direction: row;
  width: 100%;
  height: 100%;
  overflow: hidden;
  }

  
  /*  // === Middle Panels == */

  .middle {
  flex: 1;
  width: 0px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1vw;
  }

  .middle.shrink {
  flex: 0 0 0;
  overflow: hidden;
  opacity: 0;
  }