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

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

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

.C_main {
  width: 100%;
  justify-content: space-around;
}

.C_selector, .C_selector_readonly, .C_selector_selected, .C_selector_hover, .C_selector:hover, .C_selector_selected:hover, .C_selector_hover:hover, .C_selector_readonly:hover {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
  background-color: var(--color_text_light);
  color: var(--color_text_dark);
  filter: drop-shadow(0.1rem 0.1rem 0.2rem var(--color_3_dark));
}
.C_selector_selected, .C_selector_hover, .C_selector:hover, .C_selector_selected:hover, .C_selector_hover:hover, .C_selector_readonly:hover {
  background-color: var(--color_accent);
  color: var(--color_text_light);
}
.C_selector_hover, .C_selector:hover, .C_selector_selected:hover, .C_selector_hover:hover, .C_selector_readonly:hover {
  background-color: var(--color_3);
  color: var(--color_accent);
}
.C_selector_readonly {
  pointer-events: none;
}