header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0;
  background-color: rgba(0, 0, 0, 0.7);
  padding-inline: 0.5rem;
}