/* ============================================================
   08. HEADER & NAVIGATION
   ============================================================ */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  block-size: var(--header-height);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background-color var(--dur-med) var(--ease-out),
    box-shadow var(--dur-med) var(--ease-out);
}

.site-header.is-scrolled {
  background: rgba(250, 246, 238, 0.96);
  box-shadow: var(--shadow-header);
}

/* While the header floats over the dark hero (not scrolled), its content
   switches to light-on-dark; once scrolled it reverts to the ivory theme. */
.site-header:not(.is-scrolled) .brand {
  color: var(--color-ivory-100);
}

.site-header:not(.is-scrolled) .brand-title {
  color: var(--color-text-inverse-muted);
}

.site-header:not(.is-scrolled) .primary-nav a {
  color: var(--color-ivory-100);
}

.site-header:not(.is-scrolled) .primary-nav a:hover,
.site-header:not(.is-scrolled) .primary-nav a[aria-current="true"] {
  color: var(--color-gold-300);
}

.site-header:not(.is-scrolled) .lang-switch,
.site-header:not(.is-scrolled) .menu-toggle {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-border-navy);
  color: var(--color-ivory-100);
}

.site-header:not(.is-scrolled) .lang-switch:hover {
  border-color: var(--color-gold-400);
  color: var(--color-gold-300);
}

.site-header:not(.is-scrolled) .header-cv {
  background: var(--gradient-gold);
  color: var(--color-navy-950);
}

.site-header:not(.is-scrolled) .header-cv:hover {
  background: var(--gradient-gold);
  filter: brightness(1.08);
  color: var(--color-navy-950);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  /* Wider than the page column so nine section links can sit on one row.
     min-width: 0 lets this flex item honor that width instead of growing
     with the nowrap nav. */
  width: min(100% - 1.5rem, 96rem);
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 0.75rem;
  font-weight: 700;
  color: var(--color-navy-900);
}

.brand img {
  inline-size: 2.9rem;
  block-size: 2.9rem;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

/* Lift the navy logo tile off the dark hero behind the transparent header */
.site-header:not(.is-scrolled) .brand img {
  box-shadow: 0 0 0 1px rgba(201, 162, 75, 0.45);
}

.brand-name {
  font-size: 1.05rem;
  line-height: 1.2;
}

.brand-title {
  display: block;
  margin-block-start: 0.4rem;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.primary-nav ul {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0.35rem 0.65rem;
}

.primary-nav a {
  position: relative;
  display: inline-block;
  padding: 0.45rem 0.12rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-navy-900);
  white-space: nowrap;
}

.primary-nav a::after {
  content: "";
  position: absolute;
  inset-inline: 0.35rem;
  inset-block-end: 0.25rem;
  block-size: 2px;
  background: var(--color-gold-500);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--dur-fast) var(--ease-out);
}

.primary-nav a:hover::after,
.primary-nav a[aria-current="true"]::after {
  transform: scaleX(1);
}

.primary-nav a[aria-current="true"] {
  color: var(--color-gold-600);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  gap: var(--space-3);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-block-size: 2.75rem;
  min-inline-size: 2.75rem;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--fs-small);
  font-weight: 600;
  background: var(--color-surface);
  color: var(--color-navy-900);
}

.lang-switch:hover {
  border-color: var(--color-gold-500);
  color: var(--color-gold-600);
}

/* English label inside Arabic page keeps Latin font, and vice versa */
html[lang="ar"] .lang-switch {
  font-family: var(--font-en);
}

html[lang="en"] .lang-switch {
  font-family: var(--font-ar);
}

.header-cv {
  display: inline-flex;
}

/* --- Mobile menu trigger --- */
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  inline-size: 2.9rem;
  block-size: 2.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-navy-900);
}

.menu-toggle svg {
  inline-size: 1.4rem;
  block-size: 1.4rem;
}

.menu-toggle .icon-close,
.menu-toggle[aria-expanded="true"] .icon-menu {
  display: none;
}

.menu-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

/* --- Mobile navigation panel --- */
.mobile-nav {
  position: fixed;
  inset-block: 0;
  inset-inline-end: 0;
  z-index: 150;
  inline-size: min(21rem, 88vw);
  background: var(--grain), var(--gradient-navy);
  color: var(--color-ivory-100);
  padding: calc(var(--header-height) + 1rem) var(--space-5) var(--space-6);
  transform: translateX(var(--menu-slide, -100%));
  visibility: hidden;
  transition: transform var(--dur-med) var(--ease-out),
    visibility 0s linear var(--dur-med);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  overflow-y: auto;
}

/* RTL: panel sits at the left edge conceptually? No — inset-inline-end places it
   at the "end" side automatically; slide direction must match writing mode. */
html[dir="rtl"] .mobile-nav {
  --menu-slide: -100%;
}

html[dir="ltr"] .mobile-nav {
  --menu-slide: 100%;
}

.mobile-nav.is-open {
  transform: translateX(0);
  visibility: visible;
  transition: transform var(--dur-med) var(--ease-out);
}

.mobile-nav-close {
  position: absolute;
  inset-block-start: 1rem;
  inset-inline-end: 1.25rem;
  inline-size: 2.9rem;
  block-size: 2.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border-navy);
  border-radius: var(--radius-sm);
  color: var(--color-ivory-100);
}

.mobile-nav-close svg {
  inline-size: 1.2rem;
  block-size: 1.2rem;
}

.mobile-nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-nav ul a {
  display: block;
  padding: 0.8rem 0.5rem;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-ivory-100);
  border-block-end: 1px solid var(--color-border-navy);
}

.mobile-nav ul a[aria-current="true"] {
  color: var(--color-gold-300);
  font-weight: 700;
  border-inline-start: 3px solid var(--color-gold-400);
  padding-inline-start: 0.85rem;
}

.mobile-nav-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-block-start: auto;
}

.mobile-nav-actions .lang-switch {
  background: transparent;
  border-color: var(--color-border-navy);
  color: var(--color-ivory-100);
}

.menu-backdrop {
  position: fixed;
  inset: 0;
  z-index: 140;
  background: rgba(6, 15, 28, 0.55);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-med) var(--ease-out),
    visibility 0s linear var(--dur-med);
}

.menu-backdrop.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity var(--dur-med) var(--ease-out);
}

body.menu-open {
  overflow: hidden;
}