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

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

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

.C_main {
  flex-grow: 1;
  align-items: center;
}

.C_message {
  padding: 1rem;
  color: var(--color_text_light);
  font-size: 1.5rem;
  font-weight: bold;
}

.C_button {
  width: 100%;
  padding: 0.3rem;
}