.flex_row {
  display: flex;
  flex-flow: row nowrap;
}

.flex_col {
  display: flex;
  flex-flow: column nowrap;
}

.fill {
  width: 100%;
  height: 100%;
}

.C_open, .C_closed {
  width: 1.5rem;
  height: 1.5rem;
  cursor: pointer;
  fill: var(--color_label);
}

.C_closed {
  transform: rotate(90deg);
}