/* ============================================
   Header & Mega Menu
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: var(--z-header);
  padding-block: var(--space-6);
  transition: all var(--duration-base) var(--ease-out);
}

.site-header.is-scrolled {
  padding-block: var(--space-3);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  flex-shrink: 0;
}

.brand-mark {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
}

.brand-text small {
  display: block;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 2px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.main-nav > ul {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: 600;
  font-size: var(--text-sm);
  padding-block: var(--space-2);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  right: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent-primary);
  transition: width var(--duration-fast) var(--ease-out);
}

.nav-link:hover::after,
.has-mega:hover .nav-link::after {
  width: 100%;
}

.nav-item {
  position: relative;
}

.nav-caret {
  width: 10px;
  height: 10px;
  transition: transform var(--duration-fast) var(--ease-out);
}

.has-mega:hover .nav-caret {
  transform: rotate(180deg);
}

/* ===== Mega Menu ===== */
.mega-menu {
  position: absolute;
  top: calc(100% + var(--space-6));
  right: 50%;
  transform: translateX(50%) translateY(12px);
  width: 720px;
  max-width: 90vw;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--duration-base) var(--ease-out);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-8);
}

.has-mega:hover .mega-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(50%) translateY(0);
}

.mega-col-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}

.mega-service-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  transition: background var(--duration-fast) var(--ease-out);
}

.mega-service-item:hover {
  background: var(--color-bg-secondary);
}

.mega-service-item .icon {
  width: 20px;
  height: 20px;
  color: var(--color-accent-primary);
  flex-shrink: 0;
  margin-top: 3px;
}

.mega-service-item strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 700;
}

.mega-service-item span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.mega-feature-card {
  background: linear-gradient(160deg, var(--color-accent-secondary), #2A342B);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  color: #F7F5F1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}

.mega-feature-card h5 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  margin-bottom: var(--space-2);
}

.mega-feature-card p {
  color: rgba(247, 245, 241, 0.75);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

.theme-toggle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--color-border-strong);
  transition: all var(--duration-fast) var(--ease-out);
  position: relative;
}

.theme-toggle:hover {
  border-color: var(--color-accent-primary);
  background: var(--color-bg-secondary);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: opacity var(--duration-fast), transform var(--duration-fast);
}

.theme-toggle .icon-sun { opacity: 1; transform: scale(1) rotate(0); }
.theme-toggle .icon-moon { opacity: 0; transform: scale(0.5) rotate(-90deg); }

[data-theme="dark"] .theme-toggle .icon-sun { opacity: 0; transform: scale(0.5) rotate(90deg); }
[data-theme="dark"] .theme-toggle .icon-moon { opacity: 1; transform: scale(1) rotate(0); }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-border-strong);
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text-primary);
  position: relative;
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-toggle span::before { position: absolute; top: -6px; }
.nav-toggle span::after { position: absolute; top: 6px; }

.nav-toggle.is-active span { background: transparent; }
.nav-toggle.is-active span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.is-active span::after { top: 0; transform: rotate(-45deg); }

.mobile-nav-footer {
  display: none;
}

@media (max-width: 1024px) {
  .main-nav { display: none; }
  .nav-toggle { display: flex; }

  /* في الجوال واللوحي: يبقى الشريط العلوي مضغوطاً (الشعار + زر الوضع الليلي + زر القائمة)،
     وينتقل زر "اطلب عرض سعر" فقط إلى داخل القائمة المنسدلة */
  .header-actions .btn.btn-primary {
    display: none;
  }

  .main-nav.is-open {
    display: flex;
    position: fixed;
    inset: 0;
    top: 0;
    background: var(--color-bg-primary);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-24) var(--space-6) var(--space-6);
    gap: var(--space-2);
    z-index: var(--z-overlay);
    overflow-y: auto;
  }

  .main-nav.is-open > ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .main-nav.is-open .nav-link {
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--text-lg);
  }

  .mega-menu {
    position: static;
    transform: none;
    width: 100%;
    max-width: 100%;
    grid-template-columns: 1fr;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    display: none;
    border: none;
    padding: var(--space-4) 0;
  }

  .has-mega.is-expanded .mega-menu {
    display: grid;
  }

  .main-nav.is-open .mobile-nav-footer {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
  }

  .main-nav.is-open .mobile-nav-footer .btn.btn-primary {
    flex: 1;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .site-header { padding-block: var(--space-4); }
  .site-header.is-scrolled { padding-block: var(--space-2); }
  .header-inner { gap: var(--space-2); }
  .brand { gap: var(--space-2); font-size: var(--text-xs); }
  .brand-mark { width: 34px; height: 34px; }
  .brand-text small { font-size: 0.6rem; }
  .header-actions { gap: var(--space-2); }
  .header-actions .theme-toggle { width: 40px; height: 40px; }
  .nav-toggle { width: 40px; height: 40px; }
}