index-shop/assets/css/partials/_site-header.scss

@keyframes add-border {
  from {
    border-bottom-color: transparent;
  }
  to {
    border-bottom: var(--grey-800);
  }
}

#site-header {
  position: fixed;
  left: var(--padding-body);
  top: 0px;
  z-index: 900;

  width: calc(100vw - var(--padding-body) * 2);
  // padding: 0 var(--padding-body);
  height: var(--header-h);
  &.is-shrinked {
    height: var(--header-h-shrinked);
    // animation: add-border 0.2s linear 0.2s;
    border-bottom: var(--border-light);
  }
  // transition: all ease-in 0.2s;

  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;

  .site-title {
    display: flex;
    width: 120px;
    transition: all ease-in 0.2s;
    overflow: hidden;
    svg {
      fill: var(--color-txt);
    }
  }
  &.is-shrinked {
    .site-title {
      width: 80px !important;
    }
  }

  .header-left {
    width: 90px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
  }

  .header-right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1rem;
  }

  .header-center {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  #toggle-lang {
    list-style: none;
    display: flex;
    justify-content: flex-end;
    gap: 0.75ch;
    text-transform: uppercase;
    color: var(--grey-400);
    line-height: 1;
    margin: 0;
    padding: 0;

    a {
      text-decoration: none;
    }
    li.is-selected {
      color: var(--color-txt);
    }
  }

  .header-cart-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    text-transform: uppercase;
    color: var(--color-txt);
    padding: 0;
    line-height: 1;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: opacity 0.2s;

    &:hover {
      opacity: 0.7;
    }
  }

  .header-cart-count {
    font-weight: normal;

    &:empty {
      display: none;
    }

    &:not(:empty)::before {
      content: '(';
    }

    &:not(:empty)::after {
      content: ')';
    }
  }
}