/* ==========================================================================
   Flexopack — Site Header
   --------------------------------------------------------------------------
   Two modes via `--transparent` / `--solid`. Both share the same layout —
   modifiers only flip background, text color, and on-scroll behavior.
   ========================================================================== */

@layer components {

  .site-header {
    container-type: inline-size;
    container-name: site-header;
    width: 100%;
    z-index: 1000;
    transition: background var(--duration-slow) var(--ease-standard),
                box-shadow var(--duration-slow) var(--ease-standard),
                backdrop-filter var(--duration-slow) var(--ease-standard);
  }

  /* ---------- Transparent mode (over hero) ---------- */
  .site-header--transparent {
    position: absolute;
    top: 0;
    left: 0;
    background: linear-gradient(
      to bottom,
      oklch(0.08 0 0 / 0.4) 0%,
      oklch(0.08 0 0 / 0.15) 70%,
      transparent 100%
    );
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
  }

  .site-header--transparent.is-scrolled,
  .site-header--transparent.is-menu-open {
    position: fixed;
    background: var(--bg-surface);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: var(--shadow-m);
  }

  /* ---------- Solid mode (inner pages) ---------- */
  .site-header--solid {
    position: sticky;
    top: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-primary);
  }

  .site-header--solid.is-scrolled {
    box-shadow: var(--shadow-m);
    border-bottom-color: transparent;
  }

  /* ---------- Layout ---------- */
  .site-header__inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: var(--space-l);
    padding-block: var(--space-m);
    transition: padding var(--duration-normal) var(--ease-standard);
  }

  .site-header.is-scrolled .site-header__inner {
    padding-block: var(--space-s);
  }

  .site-header__left {
    display: flex;
    align-items: center;
    justify-content: flex-start;
  }

  .site-header__right {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-m);
  }

  /* ---------- Logo ---------- */
  .site-header__logo {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
  }

  .site-header__logo-img {
    height: 5.2rem;
    width: auto;
    display: block;
    transition: height var(--duration-normal) var(--ease-standard);
  }

  .site-header.is-scrolled .site-header__logo-img {
    height: 4rem;
  }

  /* ---------- Phone link ---------- */
  .site-header__phone {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2xs);
    font-size: var(--text-s);
    font-weight: var(--weight-medium);
    white-space: nowrap;
    transition: color var(--duration-fast) var(--ease-standard),
                opacity var(--duration-fast) var(--ease-standard);
  }

  .site-header--transparent:not(.is-scrolled):not(.is-menu-open) .site-header__phone {
    color: var(--always-light);
  }

  .site-header--transparent:not(.is-scrolled):not(.is-menu-open) .site-header__phone:hover {
    opacity: 0.8;
  }

  .site-header--solid .site-header__phone,
  .site-header.is-scrolled .site-header__phone,
  .site-header.is-menu-open .site-header__phone {
    color: var(--text-body);
  }

  .site-header--solid .site-header__phone:hover,
  .site-header.is-scrolled .site-header__phone:hover,
  .site-header.is-menu-open .site-header__phone:hover {
    color: var(--primary-d-1);
  }

  .site-header__phone-icon {
    width: 1.6rem;
    height: 1.6rem;
  }

  /* ---------- Desktop nav ---------- */
  .site-header__nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
  }

  .site-header__nav-link {
    position: relative;
    font-size: var(--nav-link-size);
    font-weight: var(--weight-medium);
    white-space: nowrap;
    padding-block: var(--space-2xs);
    transition: color var(--duration-fast) var(--ease-standard),
                opacity var(--duration-fast) var(--ease-standard);
  }

  .site-header__nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: currentColor;
    transition: width var(--duration-normal) var(--ease-standard);
  }

  .site-header__nav-link:hover::after,
  .site-header__nav-link[aria-current="page"]::after {
    width: 100%;
  }

  .site-header--transparent:not(.is-scrolled):not(.is-menu-open) .site-header__nav-link {
    color: var(--always-light);
  }

  .site-header--solid .site-header__nav-link,
  .site-header.is-scrolled .site-header__nav-link,
  .site-header.is-menu-open .site-header__nav-link {
    color: var(--text-body);
  }

  .site-header--solid .site-header__nav-link::after,
  .site-header.is-scrolled .site-header__nav-link::after,
  .site-header.is-menu-open .site-header__nav-link::after {
    background: var(--primary);
  }

  .site-header--solid .site-header__nav-link:hover,
  .site-header.is-scrolled .site-header__nav-link:hover,
  .site-header.is-menu-open .site-header__nav-link:hover {
    color: var(--primary-d-1);
  }

  /* ---------- CTA ---------- */
  .site-header__cta {
    color: var(--text-body);
    flex-shrink: 0;
  }

  /* ---------- Language switcher (flag dropdown) ---------- */
  .lang-switch {
    flex-shrink: 0;
  }

  /* Shared flag chip — small rounded image, hairline so a white field
     (e.g. AT's centre band) stays visible against a light header. */
  .lang-switch__flag {
    width: 2rem;
    height: 1.4rem;
    object-fit: cover;
    border-radius: 2px;
    box-shadow: inset 0 0 0 1px oklch(0 0 0 / 0.12);
    flex-shrink: 0;
    display: block;
  }

  /* ---- Dropdown variant (desktop) ---- */
  .lang-switch--dropdown {
    position: relative;
    display: inline-flex;
  }

  .lang-switch__trigger {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2xs);
    padding: var(--space-2xs) var(--space-xs);
    border-radius: var(--radius-s);
    font-size: var(--text-s);
    font-weight: var(--weight-semibold);
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: color var(--duration-fast) var(--ease-standard),
                background var(--duration-fast) var(--ease-standard);
  }

  .lang-switch__chevron {
    width: 1.4rem;
    height: 1.4rem;
    transition: transform var(--duration-fast) var(--ease-standard);
  }

  .lang-switch--dropdown.is-open .lang-switch__chevron {
    transform: rotate(180deg);
  }

  /* Popover */
  .lang-switch__menu {
    position: absolute;
    top: calc(100% + var(--space-2xs));
    right: 0;
    min-width: 15rem;
    padding: var(--space-2xs);
    background: var(--bg-surface);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-m);
    box-shadow: var(--shadow-l);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity var(--duration-fast) var(--ease-standard),
                transform var(--duration-fast) var(--ease-standard),
                visibility var(--duration-fast) var(--ease-standard);
    z-index: 10;
  }

  .lang-switch--dropdown.is-open .lang-switch__menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  /* ---- Option rows (shared by dropdown menu + mobile inline) ---- */
  .lang-switch__option {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-s);
    border-radius: var(--radius-s);
    font-size: var(--text-s);
    font-weight: var(--weight-medium);
    color: var(--text-body);
    white-space: nowrap;
    transition: background var(--duration-fast) var(--ease-standard),
                color var(--duration-fast) var(--ease-standard);
  }

  a.lang-switch__option:hover,
  a.lang-switch__option:focus-visible {
    background: var(--bg-muted);
    color: var(--primary-d-1);
  }

  .lang-switch__option.is-active {
    color: var(--primary-d-1);
    font-weight: var(--weight-semibold);
  }

  /* Trigger color follows the header mode, like the phone link + nav. */
  .site-header--transparent:not(.is-scrolled):not(.is-menu-open) .lang-switch__trigger {
    color: var(--always-light);
  }

  .site-header--transparent:not(.is-scrolled):not(.is-menu-open) .lang-switch__trigger:hover {
    background: oklch(1 0 0 / 0.12);
  }

  .site-header--solid .lang-switch__trigger,
  .site-header.is-scrolled .lang-switch__trigger,
  .site-header.is-menu-open .lang-switch__trigger {
    color: var(--text-body);
  }

  .site-header--solid .lang-switch__trigger:hover,
  .site-header.is-scrolled .lang-switch__trigger:hover,
  .site-header.is-menu-open .lang-switch__trigger:hover {
    background: var(--bg-muted);
    color: var(--primary-d-1);
  }

  /* ---- Inline variant (mobile menu) ---- */
  .lang-switch--inline {
    display: flex;
    justify-content: center;
    gap: var(--space-xs);
    margin-top: var(--space-2xs);
  }

  .lang-switch--inline .lang-switch__option {
    font-size: var(--text-m);
    border: 1px solid var(--border-primary);
  }

  .lang-switch--inline .lang-switch__option.is-active {
    border-color: var(--primary);
  }

  /* ---------- Mobile toggle ---------- */
  .site-header__toggle {
    display: none;
    padding: var(--space-2xs);
    color: var(--text-body);
    transition: color var(--duration-fast) var(--ease-standard);
  }

  .site-header--transparent:not(.is-scrolled):not(.is-menu-open) .site-header__toggle {
    color: var(--always-light);
  }

  .site-header__hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 2.4rem;
  }

  .site-header__hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transform-origin: center;
    transition: transform var(--duration-fast) var(--ease-standard),
                opacity var(--duration-fast) var(--ease-standard);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__hamburger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .site-header__toggle[aria-expanded="true"] .site-header__hamburger span:nth-child(2) {
    opacity: 0;
  }

  .site-header__toggle[aria-expanded="true"] .site-header__hamburger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* ---------- Mobile nav (slides open) ---------- */
  .site-header__mobile-nav {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--duration-slow) var(--ease-emphasized);
  }

  .site-header__mobile-nav.is-open {
    max-height: 60rem;
  }

  .site-header__mobile-list {
    margin: var(--space-s) 0 var(--space-m);
  }

  .site-header__mobile-link {
    display: block;
    padding: var(--space-s) 0;
    font-size: var(--text-m);
    font-weight: var(--weight-medium);
    color: var(--text-body);
    border-bottom: 1px solid var(--border-primary);
    transition: color var(--duration-fast) var(--ease-standard);
  }

  .site-header__mobile-link:hover,
  .site-header__mobile-link[aria-current="page"] {
    color: var(--primary-d-1);
  }

  .site-header__mobile-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-s);
    margin-bottom: var(--space-m);
  }

  .site-header__mobile-phone {
    display: inline-flex;
    align-items: center;
    gap: var(--space-s);
    color: var(--text-body);
    font-size: var(--text-m);
    font-weight: var(--weight-medium);
    padding-block: var(--space-xs);
  }

  .site-header__mobile-phone:hover {
    color: var(--primary-d-1);
  }

  .site-header__mobile-cta {
    width: 100%;
    text-align: center;
  }

  /* ---------- Responsive ---------- */
  @container site-header (max-width: 968px) {
    .site-header__nav-list {
      gap: var(--space-l);
    }

    .site-header__phone-text {
      display: none;
    }
  }

  @container site-header (max-width: 768px) {
    .site-header__inner {
      display: flex;
      justify-content: space-between;
    }

    .site-header__nav,
    .site-header__right {
      display: none;
    }

    .site-header__toggle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
  }

  @container site-header (max-width: 480px) {
    .site-header__logo-img {
      height: 4.2rem;
    }

    .site-header.is-scrolled .site-header__logo-img {
      height: 3.4rem;
    }
  }
}