/**
 * Header Styles - Sticky Navigation with Hamburger Menu
 *
 * This file contains all styles for the site header including:
 * - Sticky header behavior
 * - Desktop horizontal navigation
 * - Mobile hamburger menu
 * - Responsive breakpoints
 * - Accessibility features
 *
 * @package Apus_Theme
 * @since 1.0.0
 */

/* ==========================================================================
   Header Base Styles
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  background-color: var(--header-bg, #ffffff);
  box-shadow: var(--header-shadow, 0 2px 4px rgba(0, 0, 0, 0.1));
  z-index: var(--z-header, 1000);
  transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

/* Enhanced shadow when scrolled */
.site-header.scrolled {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  max-width: 1200px;
  margin: 0 auto;
  min-height: var(--header-height, 70px);
}

/* ==========================================================================
   Site Branding / Logo
   ========================================================================== */

.site-branding {
  flex-shrink: 0;
  z-index: 2;
}

.site-identity {
  display: flex;
  flex-direction: column;
}

.site-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold, 700);
  line-height: 1.2;
}

.site-title a {
  color: var(--color-dark, #212529);
  text-decoration: none;
  transition: color 0.3s ease;
}

.site-title a:hover {
  color: var(--color-primary, #007bff);
  text-decoration: none;
}

.site-title a:focus {
  outline: 2px solid var(--color-primary, #007bff);
  outline-offset: 2px;
  border-radius: 2px;
}

.site-description {
  margin: 0.25rem 0 0 0;
  font-size: 0.875rem;
  color: var(--color-secondary, #6c757d);
  line-height: 1.3;
}

/* Custom Logo */
.custom-logo-link {
  display: inline-block;
  line-height: 0;
}

.custom-logo {
  max-height: 50px;
  width: auto;
  height: auto;
  transition: opacity 0.3s ease;
}

.custom-logo:hover {
  opacity: 0.8;
}

/* ==========================================================================
   Desktop Navigation
   ========================================================================== */

.desktop-nav {
  display: none;
}

.primary-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0.5rem;
}

.primary-menu li {
  position: relative;
  margin: 0;
}

.primary-menu a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--color-dark, #212529);
  text-decoration: none;
  font-weight: var(--font-weight-medium, 500);
  font-size: 1rem;
  border-radius: 4px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.primary-menu a:hover,
.primary-menu a:focus {
  background-color: var(--color-light, #f8f9fa);
  color: var(--color-primary, #007bff);
  text-decoration: none;
}

.primary-menu a:focus {
  outline: 2px solid var(--color-primary, #007bff);
  outline-offset: 2px;
}

/* Current menu item */
.primary-menu .current-menu-item > a,
.primary-menu .current_page_item > a {
  color: var(--color-primary, #007bff);
  background-color: rgba(0, 123, 255, 0.1);
}

/* Submenu styles (if needed) */
.primary-menu .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: #ffffff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-radius: 4px;
  padding: 0.5rem 0;
  margin: 0;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
}

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

.primary-menu .sub-menu a {
  padding: 0.5rem 1rem;
}

/* ==========================================================================
   Mobile Menu Toggle (Hamburger)
   ========================================================================== */

.mobile-menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  z-index: var(--z-header, 1000);
  transition: transform 0.3s ease;
}

.mobile-menu-toggle:hover {
  background-color: var(--color-light, #f8f9fa);
  border-radius: 4px;
}

.mobile-menu-toggle:focus {
  outline: 2px solid var(--color-primary, #007bff);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Hamburger Icon */
.hamburger-icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  position: relative;
}

.hamburger-icon .line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-dark, #212529);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

/* Hamburger animation when menu is open */
.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon .line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon .line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-icon .line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ==========================================================================
   Mobile Menu Overlay
   ========================================================================== */

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-overlay, 998);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ==========================================================================
   Mobile Navigation
   ========================================================================== */

.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 280px;
  max-width: 85%;
  height: 100%;
  background-color: #ffffff;
  box-shadow: -4px 0 12px rgba(0, 0, 0, 0.15);
  z-index: var(--z-mobile-menu, 999);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-menu.active {
  transform: translateX(0);
}

/* Mobile Menu Header */
.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  border-bottom: 1px solid #e9ecef;
  position: sticky;
  top: 0;
  background-color: #ffffff;
  z-index: 10;
}

.mobile-menu-title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold, 600);
  color: var(--color-dark, #212529);
}

.mobile-menu-close {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-dark, #212529);
  transition: background-color 0.3s ease, color 0.3s ease;
  border-radius: 4px;
}

.mobile-menu-close:hover {
  background-color: var(--color-light, #f8f9fa);
  color: var(--color-primary, #007bff);
}

.mobile-menu-close:focus {
  outline: 2px solid var(--color-primary, #007bff);
  outline-offset: 2px;
}

/* Mobile Menu Items */
.mobile-primary-menu {
  list-style: none;
  margin: 0;
  padding: 1rem 0;
}

.mobile-primary-menu li {
  margin: 0;
}

.mobile-primary-menu a {
  display: block;
  padding: 0.875rem 1.5rem;
  color: var(--color-dark, #212529);
  text-decoration: none;
  font-size: 1.125rem;
  font-weight: var(--font-weight-medium, 500);
  border-left: 3px solid transparent;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.mobile-primary-menu a:hover,
.mobile-primary-menu a:focus {
  background-color: var(--color-light, #f8f9fa);
  color: var(--color-primary, #007bff);
  border-left-color: var(--color-primary, #007bff);
  text-decoration: none;
}

.mobile-primary-menu a:focus {
  outline: 2px solid var(--color-primary, #007bff);
  outline-offset: -2px;
}

/* Current menu item in mobile */
.mobile-primary-menu .current-menu-item > a,
.mobile-primary-menu .current_page_item > a {
  color: var(--color-primary, #007bff);
  background-color: rgba(0, 123, 255, 0.05);
  border-left-color: var(--color-primary, #007bff);
}

/* Mobile submenu */
.mobile-primary-menu .sub-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  background-color: #f8f9fa;
}

.mobile-primary-menu .sub-menu a {
  padding-left: 2.5rem;
  font-size: 1rem;
}

/* ==========================================================================
   Prevent body scroll when mobile menu is open
   ========================================================================== */

body.mobile-menu-open {
  overflow: hidden;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

/* Tablet and up - 768px */
@media (min-width: 768px) {
  .header-inner {
    padding: 1rem 2rem;
  }

  .site-title {
    font-size: 1.75rem;
  }

  .desktop-nav {
    display: block;
  }

  .mobile-menu-toggle {
    display: none;
  }

  .custom-logo {
    max-height: 60px;
  }
}

/* Desktop - 1024px */
@media (min-width: 1024px) {
  .primary-menu {
    gap: 1rem;
  }

  .primary-menu a {
    padding: 0.75rem 1.25rem;
  }
}

/* Large desktop - 1200px */
@media (min-width: 1200px) {
  .header-inner {
    padding: 1rem 0;
  }
}

/* ==========================================================================
   High Contrast Mode Support
   ========================================================================== */

@media (prefers-contrast: high) {
  .site-header {
    border-bottom: 2px solid currentColor;
  }

  .primary-menu a:focus,
  .mobile-menu-toggle:focus,
  .mobile-menu-close:focus {
    outline-width: 3px;
  }
}

/* ==========================================================================
   Reduced Motion Support
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .primary-menu a,
  .mobile-menu,
  .mobile-menu-overlay,
  .hamburger-icon .line,
  .mobile-menu-toggle {
    transition: none;
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
  .site-header {
    position: static;
    box-shadow: none;
    border-bottom: 1px solid #000;
  }

  .mobile-menu-toggle,
  .desktop-nav,
  .mobile-menu,
  .mobile-menu-overlay {
    display: none !important;
  }
}