틀:붉은 깃발/styles.css

.red-flag-bg  {
  position: fixed;
  width: 100%;
  height: 100vh;
  background: #8B0000;
  top: 0px;
  left: 0px;
  display: inherit;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  z-index: -100;
}