/* Canonical homepage header, shared unchanged by every route. */
.site-header, .site-header *, .site-header *::before, .site-header *::after, .skip-link { box-sizing: border-box; }
.header-sentinel { position: absolute; inset-block-start: 0; inline-size: 1px; block-size: 1px; pointer-events: none; }
.site-header { position: sticky; inset-block-start: 0; z-index: 100; margin: 0; padding: 0; background: var(--bg-header); border-block-end: 1px solid var(--border-header); font: 400 1rem/1.65 var(--font-latin); text-align: start; color: var(--text-primary); transition: border-color var(--motion-component), background-color var(--motion-component); }
html[dir="rtl"] .site-header { font-family: var(--font-arabic); }
.site-header.is-scrolled, .site-header.menu-is-open { background: var(--bg-primary); border-block-end-color: var(--border-subtle); }
.site-header .header-inner { display: flex; align-items: center; gap: 2.5rem; inline-size: min(100% - var(--gutter) * 2, var(--content-width)); margin-inline: auto; padding: 0; min-block-size: 84px; }
/* Brand also appears in the approved homepage footer. */
.brand { display: inline-flex; align-items: center; gap: .75rem; flex: 0 0 auto; min-block-size: 44px; }
.brand img { display: block; inline-size: 42px; block-size: 42px; max-inline-size: none; }
.brand-wordmark { display: grid; gap: 2px; font-family: var(--font-latin); line-height: 1; color: var(--text-primary); text-align: start; unicode-bidi: isolate; }
.brand-wordmark strong { font-family: var(--font-latin); font-size: 1.22rem; font-weight: 650; letter-spacing: .13em; }
.brand-wordmark > span { font-family: var(--font-latin); font-size: .59rem; letter-spacing: .235em; }
.site-header .brand { color: var(--text-primary); text-decoration: none; }
.site-header .site-menu { display: flex; align-items: center; justify-content: flex-end; flex: 1; gap: 1.5rem; }
.site-header [hidden] { display: none !important; }
.site-header .primary-nav { display: flex; gap: 1.45rem; margin: 0; margin-inline-end: auto; padding: 0; align-items: center; }
.site-header .nav-item { display: flex; align-items: center; position: relative; min-block-size: 44px; margin: 0; padding: 0; color: var(--text-primary); font-size: .82rem; font-weight: 400; line-height: 1.65; text-decoration: none; white-space: nowrap; transition: color var(--motion-micro); }
.site-header .nav-item::after { content: ''; position: absolute; inset-inline: 0; inset-block-end: 4px; block-size: 1px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform var(--motion-micro) var(--ease-out); }
html[dir="rtl"] .site-header .nav-item::after { transform-origin: right; }
.site-header .nav-item.is-current::after { transform: scaleX(1); }
.site-header .language-switcher { display: flex; align-items: center; gap: .15rem; }
.site-header .language-switcher a { display: grid; align-items: center; justify-items: center; min-inline-size: var(--target-size); min-block-size: var(--target-size); padding-inline: .4rem; color: var(--text-secondary); font-family: var(--font-latin); font-size: .7rem; text-decoration: none; border-radius: var(--radius-sm); unicode-bidi: isolate; }
.site-header .language-switcher a[lang="ar"] { font-family: var(--font-arabic); }
.site-header .language-switcher a.is-active { color: var(--accent); background: var(--accent-subtle); }
.site-header .btn-header { display: inline-flex; align-items: center; justify-content: center; min-block-size: var(--target-size); padding: .65rem 1rem; gap: .6rem; border: 1px solid transparent; border-radius: var(--radius-sm); background: var(--accent-fill); color: var(--accent-ink); font-family: inherit; font-size: .8rem; font-weight: 600; line-height: 1.5; text-decoration: none; white-space: nowrap; transition: background-color var(--motion-micro), box-shadow var(--motion-component), transform var(--motion-micro); }
.site-header .directional-arrow { display: block; inline-size: 18px; block-size: 18px; flex: 0 0 auto; transition: transform var(--motion-micro) var(--ease-out); }
html[dir="rtl"] .site-header .directional-arrow { rotate: 180deg; }
.site-header .btn-header:active { transform: translateY(1px); }
.site-header .menu-toggle { display: none; inline-size: 44px; block-size: 44px; padding: 12px 10px; margin: 0; font: inherit; background: transparent; border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); cursor: pointer; }
.site-header .menu-toggle span { display: block; inline-size: 22px; block-size: 1px; background: var(--text-primary); transition: transform var(--motion-micro); }
.site-header .menu-toggle span + span { margin-block-start: 6px; }
.site-header .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.site-header .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
.skip-link { position: fixed; inset-block-start: .5rem; inset-inline-start: var(--gutter); z-index: 110; padding: .75rem 1.25rem; background: var(--text-primary); color: var(--bg-primary); font: 400 1rem/1.65 var(--font-latin); text-decoration: none; transform: translateY(-200%); }
html[dir="rtl"] .skip-link { font-family: var(--font-arabic); }
.skip-link:focus { transform: none; color: var(--bg-primary); }
@media (hover: hover) {
  .site-header .nav-item:hover { color: var(--accent); }
  .site-header .nav-item:hover::after { transform: scaleX(1); }
  .site-header .language-switcher a:hover { color: var(--text-primary); background: var(--surface); }
  .site-header .btn-header:hover { background: var(--accent-hover); color: var(--accent-ink); box-shadow: 0 4px 16px var(--shadow-medium); }
  .site-header .btn-header:hover .directional-arrow { transform: translateX(3px); }
  html[dir="rtl"] .site-header .btn-header:hover .directional-arrow { transform: translateX(-3px); }
}
@media (max-width: 1099px) {
  .site-header .header-inner { min-block-size: 72px; flex-wrap: wrap; justify-content: space-between; gap: 0; }
  .site-header .site-menu { flex-basis: 100%; flex-wrap: wrap; justify-content: flex-start; gap: 1rem; padding-block: 1rem; }
  .site-header .primary-nav { flex-basis: 100%; flex-wrap: wrap; gap: 1.5rem; }
  .nav-ready .site-header .menu-toggle { display: block; }
  .nav-ready .site-header .menu-toggle[aria-expanded="false"] + .site-menu { display: none; }
  .nav-ready .site-header .site-menu { position: absolute; inset-inline: 0; inset-block-start: 100%; padding: 1.25rem var(--gutter) 1.5rem; background: var(--surface); border-block-end: 1px solid var(--border-strong); max-block-size: calc(100dvh - 72px); overflow-y: auto; box-shadow: 0 16px 28px var(--shadow-medium); }
  .nav-ready .site-header .primary-nav { display: grid; gap: 0; }
  .nav-ready .site-header .nav-item { padding-block: .6rem; font-size: .94rem; border-block-end: 1px solid var(--border-subtle); }
  .nav-ready .site-header .nav-item::after { inset-block-end: 0; }
  .nav-ready .site-header .language-switcher { margin-inline-end: auto; }
}
@media (prefers-reduced-motion: reduce) {
  .site-header, .site-header *, .site-header *::before, .site-header *::after { animation: none !important; transition: none !important; }
  .site-header .btn-header:active, .site-header .btn-header:hover .directional-arrow { transform: none; }
}