@mixin styles() {
  .v-box {
    display: flex !important;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    .fill-space {
      flex: 1 1 auto !important;
      overflow: auto !important;
    }
  }
  .container-center {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    display: flex;
    > div {
      margin: auto;
    }
  }
  .container-va-middle > * {
    vertical-align: middle;
  }
}