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

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

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

.C_options {
  padding: 0.5rem;
  border: solid var(--color_1 0.1rem);
}