/**
 * Optimized Header Styles
 * Mobile-first responsive design with modern UI
 * 
 * @package xosoarik
 * @version 3.0.0
 */

/* ==========================================================================
   HEADER STYLES
   ========================================================================== */

.site-header {
  background: linear-gradient(135deg, #ffffff 0%, #fef2f2 100%);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
}

/* Top Bar */
.header-top-bar {
  background-color: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
  font-size: var(--text-sm);
}

.header-top-bar .container {
  max-width: 1200px;
}

/* Main Header */
.header-main {
  background: white;
  border-bottom: 1px solid var(--color-gray-200);
}

.header-main .container {
  max-width: 1200px;
}

.header-logo img {
  max-height: 50px;
  width: auto;
}

@media (min-width: 768px) {
  .header-logo img {
    max-height: 60px;
  }
}

.header-title {
  flex: 1;
  text-align: center;
}

.header-title-mobile {
  flex: 1;
  text-align: center;
}

.site-title a {
  text-decoration: none;
  transition: all var(--transition-normal);
}

.site-title a:hover {
  transform: translateY(-1px);
}

.site-title .text-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 8s ease-in-out infinite;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* Navigation */
.header-navigation {
  background: white;
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
}

.header-navigation .container {
  max-width: 1200px;
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.nav-menu li {
  position: relative;
}

.nav-menu a {
  display: flex;
  align-items: center;
  padding: var(--space-3) 0;
  font-weight: var(--font-medium);
  color: var(--color-gray-700);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
  font-size: var(--text-sm);
}

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

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

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

/* Submenu */
.nav-menu .sub-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
  z-index: var(--z-dropdown);
  list-style: none;
  margin: 0;
  padding: var(--space-2) 0;
}

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

.nav-menu .sub-menu li {
  border-bottom: 1px solid var(--color-gray-100);
}

.nav-menu .sub-menu li:last-child {
  border-bottom: none;
}

.nav-menu .sub-menu a {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  border-radius: 0;
  display: block;
}

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

.nav-menu .sub-menu a:hover {
  background-color: var(--color-primary-50);
  color: var(--color-primary);
}

/* Quick Links */
.quick-links a {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.quick-links a:hover {
  background-color: var(--color-primary-50);
}

/* Search Bar */
.search-bar {
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
}

.search-bar .container {
  max-width: 1200px;
}

.search-field {
  font-size: var(--text-base);
  transition: all var(--transition-fast);
}

.search-field:focus {
  box-shadow: 0 0 0 3px rgb(220 38 38 / 0.1);
}

/* Mobile Sidebar */
.mobile-sidebar {
  position: fixed;
  top: 0;
  left: -100%;
  width: 320px;
  height: 100vh;
  background: white;
  z-index: var(--z-modal);
  transition: left var(--transition-normal);
  box-shadow: var(--shadow-xl);
}

.mobile-sidebar.active {
  left: 0;
}

.mobile-sidebar-header {
  background: var(--color-primary);
  color: white;
}

.mobile-sidebar-content {
  padding: var(--space-4);
  height: calc(100vh - 80px);
  overflow-y: auto;
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */

/* Tablet */
@media (max-width: 1023px) {
  .nav-menu {
    gap: var(--space-4);
  }
  
  .nav-menu a {
    font-size: var(--text-xs);
    padding: var(--space-2) 0;
  }
  
  .quick-links {
    display: none;
  }
}

/* Mobile */
@media (max-width: 767px) {
  .header-main .flex {
    flex-direction: column;
    gap: var(--space-3);
  }
  
  .header-title {
    order: -1;
  }
  
  .site-title a {
    font-size: var(--text-xl);
  }
  
  .site-description {
    display: none;
  }
  
  .nav-menu {
    flex-direction: column;
    gap: 0;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    margin-top: var(--space-4);
    padding: var(--space-4);
    position: absolute;
    top: 100%;
    left: var(--space-4);
    right: var(--space-4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    z-index: var(--z-dropdown);
  }
  
  .nav-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  
  .nav-menu li {
    border-bottom: 1px solid var(--color-gray-200);
  }
  
  .nav-menu li:last-child {
    border-bottom: none;
  }
  
  .nav-menu a {
    padding: var(--space-3) 0;
    font-size: var(--text-sm);
  }
  
  .nav-menu .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: var(--color-gray-50);
    margin-top: var(--space-2);
    border-radius: var(--radius-md);
    margin-left: var(--space-4);
  }
  
  .nav-menu .sub-menu a {
    padding: var(--space-2) var(--space-3);
  }
  
  .mobile-sidebar {
    width: 100%;
  }
  
  .header-actions {
    order: 1;
  }
  
  .header-logo {
    order: 2;
  }
  
  .header-title-mobile {
    order: 3;
  }
}

/* Small Mobile */
@media (max-width: 639px) {
  .header-top-bar {
    display: none;
  }
  
  .header-main {
    padding: var(--space-3) 0;
  }
  
  .site-title a {
    font-size: var(--text-lg);
  }
  
  .nav-menu {
    left: var(--space-2);
    right: var(--space-2);
  }
}

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-header {
  animation: slideDown 0.6s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav-menu.active {
  animation: fadeInUp 0.3s ease-out;
}

/* ==========================================================================
   ACCESSIBILITY
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for keyboard navigation */
.nav-menu a:focus,
.btn:focus,
.search-field:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .site-title .text-primary {
    -webkit-text-fill-color: initial;
    color: var(--color-primary);
  }
  
  .nav-menu a::after {
    height: 3px;
  }
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */

@media print {
  .site-header {
    position: static;
    background: white;
    border-bottom: 2px solid black;
  }
  
  .header-top-bar,
  .header-navigation,
  .search-bar,
  .mobile-sidebar,
  .mobile-menu-overlay {
    display: none;
  }
  
  .header-main {
    border-bottom: none;
  }
  
  .site-title a {
    color: black;
  }
}

/* ==========================================================================
   UTILITY CLASSES
   ========================================================================== */

.ml-1 { margin-left: var(--space-1); }
.ml-2 { margin-left: var(--space-2); }
.mr-1 { margin-right: var(--space-1); }
.mr-2 { margin-right: var(--space-2); }

.hover\:bg-white:hover { background-color: white; }
.hover\:text-primary:hover { color: var(--color-primary); }

.border-white { border-color: white; }
.text-white { color: white; }

/* Mobile menu toggle button */
#mobile-menu-toggle {
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Search toggle button */
#search-toggle {
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}