.container {
  height: 100%;
  display: flex;
  flex-flow: row;
  padding-top: 30px;
  border:3px solid #4f4f4f;
  border-top:none;

  .left-side {
    width: 380px;
    height: 100%;
    flex: 0 0 auto;
    position: relative;
  }
  .contents {
    flex: 1 1 auto;
    min-width: 400px;
    height: 100%;
    
    .messages {
      width: 100%;
      height: 100%;
    }
  }
  .right-side {
    height: 100%;
    flex: 0 0 auto;
  }
}
