.header {
  position: sticky;
  top: 0;
  width: 100%;
  height: 4.5em;
  padding: 0.7em 1.5em;
  border-bottom: 1px solid var(--kinda-light);
  background-color: var(--background-header);
  backdrop-filter: saturate(180%) blur(5px);
  z-index: 1000;
  /* light-dark theme switch fading */
  transition: color 0.25s ease, background 0.25s ease, border 0.25s ease;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 865px;
  margin: 0 auto;
}

@media screen and (max-width: 768px) {
  .header {
    padding: 0.75em 1.25em;
    height: 5.9em;
  }

  .menu {
    max-width: 325px;
  }
}

@media screen and (max-width: 380px) {
  .menu {
    max-width: 225px;
  }
}