/**
 * Header & Navigation Styles
 * 
 * @package DigiHub
 */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--dur-normal) var(--ease-smooth);
}

.site-header.scrolled {
  background: var(--bg-primary);
  box-shadow: var(--shadow-md);
}

[data-theme="dark"] .site-header.scrolled {
  background: var(--bg-dark);
}

.main-navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  transition: height var(--dur-normal);
}

.site-header.scrolled .main-navigation {
  height: 70px;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  transition: opacity var(--dur-fast), transform var(--dur-fast);
}

.site-logo img {
  height: 45px;
  width: auto;
  display: block;
}

.logo-light-text { display: none !important; }
.logo-dark-text { display: block !important; }

[data-theme="dark"] .logo-light-text { display: block !important; }
[data-theme="dark"] .logo-dark-text { display: none !important; }

.site-logo:hover {
  opacity: 0.8;
  transform: translateY(-1px);
}


/* Nav Menu */
.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-xl);
}

.nav-menu li {
  position: relative;
}

.nav-menu a {
  position: relative;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
  padding: 0.5rem 0;
  transition: color var(--dur-fast);
}

.nav-menu a:hover,
.nav-menu a.current {
  color: var(--primary);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--dur-normal) var(--ease-smooth);
}

.nav-menu a:hover::after,
.nav-menu a.current::after {
  width: 100%;
}

/* Sub-menu (Dropdown) */
.sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  list-style: none;
  margin: 0;
  padding: var(--space-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--dur-normal) var(--ease-smooth);
  z-index: var(--z-dropdown);
}

.nav-menu li:hover > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.sub-menu li {
  width: 100%;
}

.sub-menu a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-xs);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: all var(--dur-fast);
}

.sub-menu a::after {
  display: none;
}

.sub-menu a:hover {
  background: var(--primary);
  color: #fff;
  padding-left: var(--space-lg);
}

/* Menu items with children */
.menu-item-has-children > a {
  display: flex;
  align-items: center;
  gap: 0.5ch;
}

.menu-item-has-children > a::before {
  content: '';
  order: 2;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  margin-top: -4px;
  transition: transform var(--dur-normal);
}

.nav-menu li:hover > a::before {
  transform: rotate(225deg);
  margin-top: 2px;
}

.sub-menu .menu-item-has-children > a::before {
  transform: rotate(-45deg);
  margin-top: 0;
}

.sub-menu .menu-item-has-children:hover > a::before {
  transform: rotate(135deg);
}

.sub-menu .sub-menu {
  top: 0;
  left: 100%;
  margin-left: 10px;
}

/* Header Actions */
.header-actions {
  display: flex;
  /* align-items: center; */
  gap: var(--space-md);
}

/* Dark Mode Toggle */
.dark-mode-toggle {
  background: var(--bg-alt);
  border: 1px solid var(--glass-border);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-primary);
  transition: all var(--dur-fast);
  padding: 0;
  margin: 0;
}

.dark-mode-toggle:hover {
  background: var(--primary);
  color: #fff;
}

.dark-mode-toggle__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
}

.dark-mode-toggle__icon--moon { display: none; }
[data-theme="dark"] .dark-mode-toggle__icon--sun { display: none; }
[data-theme="dark"] .dark-mode-toggle__icon--moon { display: flex; }

/* Menu and Sub-Menu Toggles (Mobile) */
.sub-menu-toggle {
  display: none;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  width: 30px;
  height: 30px;
  position: relative;
  cursor: pointer;
  z-index: 10000;
  padding: 0;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  position: absolute;
  left: 0;
  transition: all 0.3s var(--ease-smooth);
  border-radius: 2px;
}

.menu-toggle span:nth-child(1) { top: 6px; }
.menu-toggle span:nth-child(2) { top: 14px; }
.menu-toggle span:nth-child(3) { top: 22px; }

.menu-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-10px);
}

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