/* ==========================================================================
   ELITEPRESSLINE HEADER
   Sticky glassmorphism header, navigation, search overlay, mobile drawer
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Main Header
   -------------------------------------------------------------------------- */

.ep-header {
  position: sticky;
  top: 0;
  z-index: var(--ep-z-sticky);
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--ep-border-light);
  transition: background-color var(--ep-transition-base), box-shadow var(--ep-transition-base);
}

.ep-header.is-scrolled {
  box-shadow: var(--ep-shadow-md);
}

.ep-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--ep-header-height);
  gap: var(--ep-space-6);
}

/* Admin bar offset */
.admin-bar .ep-header {
  top: 32px;
}

@media (max-width: 782px) {
  .admin-bar .ep-header {
    top: 46px;
  }
}

/* --------------------------------------------------------------------------
   2. Brand / Logo
   -------------------------------------------------------------------------- */

.ep-header__brand {
  flex-shrink: 0;
}

.ep-header__brand .custom-logo-link {
  display: flex;
  align-items: center;
}

.ep-header__brand .custom-logo {
  max-height: 40px;
  width: auto;
}

.ep-header__site-title {
  font-family: var(--ep-font-heading);
  font-size: var(--ep-text-xl);
  font-weight: var(--ep-weight-extrabold);
  color: var(--ep-text-primary);
  letter-spacing: var(--ep-tracking-tight);
  white-space: nowrap;
}

.ep-header__site-title:hover {
  color: var(--ep-accent);
}

/* --------------------------------------------------------------------------
   3. Desktop Navigation
   -------------------------------------------------------------------------- */

.ep-nav--desktop {
  flex: 1;
  display: flex;
  justify-content: center;
}

.ep-nav__list {
  display: flex;
  align-items: center;
  gap: var(--ep-space-1);
}

.ep-nav__link {
  display: flex;
  align-items: center;
  gap: var(--ep-space-1);
  padding: var(--ep-space-2) var(--ep-space-3);
  font-size: var(--ep-text-sm);
  font-weight: var(--ep-weight-medium);
  color: var(--ep-text-secondary);
  border-radius: var(--ep-radius-md);
  transition: all var(--ep-transition-fast);
  white-space: nowrap;
}

.ep-nav__link:hover {
  color: var(--ep-text-primary);
  background-color: var(--ep-bg-secondary);
}

.ep-nav__item--active > .ep-nav__link {
  color: var(--ep-accent);
  font-weight: var(--ep-weight-semibold);
}

.ep-nav__arrow {
  transition: transform var(--ep-transition-fast);
}

/* Dropdown */
.ep-nav__item--has-children {
  position: relative;
}

.ep-nav__submenu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  padding: var(--ep-space-2);
  background-color: var(--ep-bg-card);
  border: 1px solid var(--ep-border-light);
  border-radius: var(--ep-radius-md);
  box-shadow: var(--ep-shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--ep-transition-fast);
  z-index: var(--ep-z-dropdown);
}

/* Multi-level nested submenus (Level 3+) */
.ep-nav__submenu .ep-nav__submenu {
  top: 0;
  left: 100%;
  transform: translateX(8px);
}

.ep-nav__item--has-children:hover > .ep-nav__submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.ep-nav__submenu .ep-nav__item--has-children:hover > .ep-nav__submenu {
  transform: translateX(0);
}

.ep-nav__item--has-children:hover > .ep-nav__link .ep-nav__arrow {
  transform: rotate(180deg);
}

/* Arrow rotation for nested items */
.ep-nav__submenu .ep-nav__item--has-children > .ep-nav__link .ep-nav__arrow {
  transform: rotate(-90deg);
}

.ep-nav__submenu .ep-nav__item--has-children:hover > .ep-nav__link .ep-nav__arrow {
  transform: rotate(-90deg);
}

.ep-nav__submenu .ep-nav__link {
  font-size: var(--ep-text-sm);
  padding: var(--ep-space-2) var(--ep-space-3);
  border-radius: var(--ep-radius-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 1024px) {
  .ep-nav--desktop {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   4. Header Actions
   -------------------------------------------------------------------------- */

.ep-header__actions {
  display: flex;
  align-items: center;
  gap: var(--ep-space-2);
  flex-shrink: 0;
}

.ep-header__action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: none;
  border-radius: var(--ep-radius-full);
  color: var(--ep-text-secondary);
  cursor: pointer;
  transition: all var(--ep-transition-fast);
}

.ep-header__action-btn:hover {
  background-color: var(--ep-bg-secondary);
  color: var(--ep-text-primary);
}

/* Dark mode icon toggle */
.ep-icon-moon { display: none; }

[data-theme="dark"] .ep-icon-sun { display: none; }
[data-theme="dark"] .ep-icon-moon { display: block; }

/* Hamburger menu */
.ep-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  z-index: 210;
}

.ep-hamburger__line {
  width: 20px;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transition: all var(--ep-transition-fast);
  transform-origin: center;
}

.ep-hamburger.is-active .ep-hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.ep-hamburger.is-active .ep-hamburger__line:nth-child(2) {
  opacity: 0;
}

.ep-hamburger.is-active .ep-hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1024px) {
  .ep-hamburger {
    display: flex;
  }
}

/* --------------------------------------------------------------------------
   5. Search Overlay
   -------------------------------------------------------------------------- */

.ep-search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--ep-z-overlay);
  padding: var(--ep-space-6) 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--ep-border-light);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--ep-transition-base);
}

.ep-search-overlay.is-active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.admin-bar .ep-search-overlay {
  top: 32px;
}

@media (max-width: 782px) {
  .admin-bar .ep-search-overlay {
    top: 46px;
  }
}

.ep-search-overlay__form {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--ep-space-3);
}

.ep-search-overlay__form .ep-input {
  font-size: var(--ep-text-lg);
  padding: var(--ep-space-4) var(--ep-space-4) var(--ep-space-4) var(--ep-space-12);
  border-radius: var(--ep-radius-lg);
}

/* --------------------------------------------------------------------------
   6. Mobile Navigation Drawer
   -------------------------------------------------------------------------- */

.ep-mobile-nav {
  position: fixed;
  top: var(--ep-header-height);
  right: 0;
  bottom: 0;
  width: 300px;
  max-width: 85vw;
  z-index: 300;
  background-color: #ffffff; /* Explicit solid background */
  border-left: 1px solid var(--ep-border-light);
  box-shadow: var(--ep-shadow-xl);
  transform: translateX(100.1%); /* Force GPU layer */
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
  visibility: hidden; /* Hide when not active */
  -webkit-overflow-scrolling: touch;
}

[data-theme="dark"] .ep-mobile-nav {
  background-color: #161616;
}

.admin-bar .ep-mobile-nav {
  top: calc( var(--ep-header-height) + 32px );
}

@media (max-width: 782px) {
  .admin-bar .ep-mobile-nav {
    top: calc( var(--ep-header-height) + 46px );
  }
}

.ep-mobile-nav.is-active {
  transform: translateX(0);
  visibility: visible;
}

.ep-mobile-nav__inner {
  padding: var(--ep-space-6);
}

.ep-mobile-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--ep-space-1);
}

.ep-mobile-nav__list .ep-nav__link {
  padding: var(--ep-space-3) var(--ep-space-4);
  font-size: var(--ep-text-base);
  border-radius: var(--ep-radius-md);
}

.ep-mobile-nav__list .ep-nav__link:hover {
  background-color: var(--ep-bg-secondary);
}

.ep-mobile-nav__list .ep-nav__submenu {
  position: static;
  opacity: 1;
  visibility: visible;
  transform: none;
  box-shadow: none;
  border: none;
  padding-left: var(--ep-space-4);
  background: transparent;
  display: none;
}

.ep-nav__item.is-open > .ep-nav__submenu {
  display: block;
}

.ep-mobile-nav__list .ep-nav__item--has-children > .ep-nav__link .ep-nav__arrow {
  transition: transform var(--ep-transition-fast);
}

.ep-nav__item.is-open > .ep-nav__link .ep-nav__arrow {
  transform: rotate(180deg);
}

/* Mobile nav backdrop */
.ep-mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: calc( var(--ep-z-overlay) - 1 );
  background-color: rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--ep-transition-base);
}

.ep-mobile-nav-backdrop.is-active {
  opacity: 1;
  visibility: visible;
}

/* --------------------------------------------------------------------------
   7. Reading Progress Bar
   -------------------------------------------------------------------------- */

.ep-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--ep-accent), #ff6b6b);
  z-index: var(--ep-z-progress);
  transition: width 100ms ease-out;
  will-change: width;
  pointer-events: none;
}

.admin-bar .ep-progress-bar {
  top: 32px;
}

@media (max-width: 782px) {
  .admin-bar .ep-progress-bar {
    top: 46px;
  }
}

@media (max-width: 1024px) {
  .ep-header__inner {
    height: 60px;
  }

  /* CHROME MOBILE RENDERING FAILSAFES */
  .ep-mobile-nav__list {
    display: flex !important;
    flex-direction: column !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  .ep-mobile-nav__list .ep-nav__item {
    display: block !important;
    width: 100% !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  .ep-mobile-nav__list .ep-nav__link {
    display: flex !important;
    align-items: center !important;
    width: 100% !important;
    color: var(--ep-text-secondary, #555) !important;
    visibility: visible !important;
    opacity: 1 !important;
  }
}