hugo-theme-hello-amigo/assets/scss/_header.scss

.header {
  background: $light-background-secondary;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 20px;
  border-bottom: solid 1px $light-border-color;

  .dark-theme & {
    background: $dark-background-secondary;
    border-bottom: solid 1px $dark-border-color;
  }

  &__right {
    display: flex;
    flex-direction: row;
    align-items: center;

    @media #{$media-size-phone} {
      flex-direction: row-reverse;
    }
  }

  &__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 0 auto;
    width: 760px;
    max-width: 100%;
  }
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  cursor: pointer;
}

.theme-toggler {
  fill: currentColor;
}