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

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

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

@keyframes C_spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
.C_main {
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: center;
}

.C_spinner {
  border: 4px solid var(--spinner_color_2);
  border-top: 4px solid var(--spinner_color_1);
  border-radius: 50%;
  width: 3rem;
  height: 3rem;
  animation: C_spin 1s linear infinite;
}