/* Header & Navigation Styles */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal), padding var(--transition-normal);
  padding: var(--space-4) 0;
}

header.scrolled {
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  padding: var(--space-3) 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo Section */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: var(--text-2xl);
  color: var(--color-primary-dark);
  font-family: var(--font-heading);
}

html[dir="rtl"] .logo {
  font-family: var(--font-arabic);
}

.logo-icon {
  width: 36px;
  height: 36px;
  color: var(--color-primary-light);
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: var(--text-base);
  color: var(--color-text);
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
}

html[dir="rtl"] .nav-link {
  font-family: var(--font-arabic);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-normal);
}

html[dir="rtl"] .nav-link::after {
  left: auto;
  right: 0;
}

.nav-link:hover {
  color: var(--color-primary);
}

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

.nav-link.active {
  color: var(--color-primary);
  font-weight: 700;
}

/* Language Dropdown Selector */
.lang-selector-wrapper {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.lang-btn:hover {
  background: var(--color-bg);
  border-color: var(--color-primary-light);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: none;
  flex-direction: column;
  min-width: 130px;
  overflow: hidden;
  animation: fadeInDown var(--transition-fast) forwards;
}

html[dir="rtl"] .lang-dropdown {
  right: auto;
  left: 0;
}

.lang-dropdown.active {
  display: flex;
}

.lang-option {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  text-align: left;
  transition: background var(--transition-fast);
}

html[dir="rtl"] .lang-option {
  text-align: right;
}

.lang-option:hover {
  background: var(--color-bg);
  color: var(--color-primary);
}

.lang-option.active {
  background: rgba(27, 94, 32, 0.08);
  color: var(--color-primary);
  font-weight: 600;
}

/* Mobile Menu Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  background: transparent;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: var(--radius-full);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* Responsive Navbar */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-surface);
    box-shadow: var(--shadow-xl);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-24) var(--space-8) var(--space-8);
    gap: var(--space-6);
    transition: right var(--transition-normal);
  }

  html[dir="rtl"] .nav-menu {
    right: auto;
    left: -100%;
    transition: left var(--transition-normal);
  }

  .nav-menu.active {
    right: 0;
  }

  html[dir="rtl"] .nav-menu.active {
    left: 0;
  }

  .nav-link {
    font-size: var(--text-lg);
    width: 100%;
  }

  /* Hamburger transform when menu is active */
  .hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}