div[data-testid="stVerticalBlock"] > div[data-testid="stHorizontalBlock"] > div[data-testid="column"] {
    border-style: solid;
    border-right-style: solid;
    border-width: 1px;
    border-color: grey;
  }

div[data-testid="stHorizontalBlock"] {
  gap: 0;
}

div[data-testid="stVerticalBlock"] {
  gap: 0;
}