/* IR-webdesign project header.
   RWS assets/front/front.js keeps ownership of nav-tree submenu behaviour.
   This project layer owns only the outer header presentation, the
   compact breakpoint where the full menu ceases to fit, and smart-header scroll behaviour. */

.site-header-inner {
  gap: 28px;
}

.site-brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
}

.site-brand img {
  display: block;
  width: 168px;
  height: auto;
  transition: width .22s ease;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 26px;
  min-width: 0;
}

.site-nav > .nav-tree-list-root {
  flex-wrap: nowrap;
  gap: 8px 24px;
}

.site-header-cta {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  color: #fff;
  background: var(--ir-coral);
  border-radius: 9px;
  box-shadow: 0 8px 22px rgba(255, 77, 77, .18);
  font-size: 13px;
  line-height: 1;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.site-header-cta:hover,
.site-header-cta:focus-visible {
  color: #fff;
  background: var(--ir-coral-deep);
}

/* Smart header */
.site-header[data-smart-header] {
  position: sticky;
  top: 0;
  z-index: 2000;
  background: rgba(255, 255, 255, .965);
  transition:
    transform .26s ease,
    box-shadow .26s ease,
    background .26s ease;
  will-change: transform;
}

.site-header[data-smart-header].is-scrolled {
  background: rgba(255, 255, 255, .93);
  box-shadow: 0 10px 32px rgba(15, 17, 23, .075);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.site-header[data-smart-header].is-scrolled .site-brand img {
  width: 156px;
}

.site-header[data-smart-header].is-hidden {
  transform: translateY(-110%);
}

.site-header[data-smart-header].reduce-motion {
  transition: none;
}

/* Project compact navigation starts where the full IR menu ceases to fit,
   not at the smaller generic RWS mobile breakpoint. */
@media (max-width: 66.25em) {
  .site-header-inner {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 14px 20px;
  }

  .site-header.is-enhanced .site-nav-toggle,
  .site-header[data-project-compact-nav] .site-nav-toggle {
    display: inline-flex;
    width: 46px;
    min-width: 46px;
    min-height: 46px;
    padding: 0;
    border: 1px solid rgba(15,17,23,.10);
    border-radius: 12px;
    color: var(--ir-ink);
    background: #fff;
  }

  .site-nav-toggle-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .site-nav-toggle-icon,
  .site-nav-toggle-icon::before,
  .site-nav-toggle-icon::after {
    display: block;
    width: 20px;
    height: 2px;
    border: 0;
    border-radius: 999px;
    background: currentColor;
    transform: none;
    transition: transform .18s ease, opacity .18s ease;
  }

  .site-nav-toggle-icon {
    position: relative;
  }

  .site-nav-toggle-icon::before,
  .site-nav-toggle-icon::after {
    content: "";
    position: absolute;
    left: 0;
  }

  .site-nav-toggle-icon::before { top: -6px; }
  .site-nav-toggle-icon::after { top: 6px; }

  .site-nav-toggle[aria-expanded="true"] .site-nav-toggle-icon {
    background: transparent;
  }

  .site-nav-toggle[aria-expanded="true"] .site-nav-toggle-icon::before {
    top: 0;
    transform: rotate(45deg);
  }

  .site-nav-toggle[aria-expanded="true"] .site-nav-toggle-icon::after {
    top: 0;
    transform: rotate(-45deg);
  }

  /* Same interaction principle as v47: the menu is an overlay panel,
     it does not permanently occupy page layout space. */
  .site-nav {
    display: flex;
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% - 1px);
    z-index: 30;
    max-height: calc(100vh - 74px);
    width: 100%;
    padding: 20px 22px 22px;
    overflow-y: auto;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    border: 1px solid rgba(15,17,23,.08);
    border-radius: 0 0 18px 18px;
    background: rgba(255,255,255,.985);
    box-shadow: 0 24px 54px rgba(15,17,23,.12);
  }

  .site-header.is-enhanced .site-nav[hidden],
  .site-header[data-project-compact-nav] .site-nav[hidden] {
    display: none;
  }

  .site-nav > .nav-tree-list-root {
    align-items: stretch;
    flex-direction: column;
    gap: 2px;
    padding-top: 0;
  }

  .nav-tree-link-row {
    width: 100%;
  }

  .nav-tree-link {
    min-height: 42px;
    padding-block: 9px;
  }

  .nav-tree-toggle {
    margin-left: auto;
  }

  .nav-tree-list-sub {
    position: static;
    width: 100%;
    margin: 0 0 6px;
    padding: 4px 0 8px 20px;
    border: 0;
    border-left: 1px solid var(--color-border-muted);
    box-shadow: none;
  }

  .site-header-cta {
    width: 100%;
    margin-top: 14px;
  }

  .site-header[data-smart-header].is-scrolled .site-brand img {
    width: 154px;
  }

  html.ir-nav-open,
  html.ir-nav-open body {
    overflow: hidden;
  }
}

@media (max-width: 700px) {
  .site-brand img,
  .site-header[data-smart-header].is-scrolled .site-brand img {
    width: 154px;
  }

  .site-nav {
    padding: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header[data-smart-header],
  .site-brand img,
  .site-nav-toggle-icon,
  .site-nav-toggle-icon::before,
  .site-nav-toggle-icon::after {
    transition: none;
  }
}

/* Keyboard users can bypass the persistent project navigation. */
.skip-link {
  position: fixed;
  top: .75rem;
  left: .75rem;
  z-index: 3000;
  padding: .75rem 1rem;
  border-radius: .5rem;
  color: #fff;
  background: var(--ir-ink);
  font-size: .875rem;
  font-weight: 700;
  text-decoration: none;
  transform: translateY(calc(-100% - 2rem));
  transition: transform .18s ease;
}

.skip-link:focus-visible {
  color: #fff;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .skip-link {
    transition: none;
  }
}