/* ==========================================================================
   TASK 2 — HEADER & NAVIGATION (MOBILE-FIRST)
   Strategy: Clean BEM architecture applied directly to header.tpl tags.
   Mobile-first: Base styles define the off-canvas drawer.
   Desktop-only (min-width: 1024px) transforms it into an inline flex row.
   ========================================================================== */

/* --------------------------------------------------------------------------
   2.1  Header Shell & Overlay
   -------------------------------------------------------------------------- */
.isj-header {
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid rgba(229, 231, 235, 0.8);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

/* 
 * Apply backdrop-filter to a pseudo-element so it doesn't create a new 
 * containing block for position:fixed children (like the drawer and overlay).
 */
@supports (backdrop-filter: blur(8px)) or (-webkit-backdrop-filter: blur(8px)) {
  .isj-header {
    background: transparent;
  }

  .isj-header::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: -1;
  }
}

.isj-header__layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
  gap: var(--space-8);
  /* Ensure generous minimum spacing from nav */
}

/* Mobile Drawer Overlay */
.isj-header__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--transition-medium),
    visibility var(--transition-medium);
}

.isj-header__overlay--active {
  opacity: 1;
  visibility: visible;
}

/* --------------------------------------------------------------------------
   2.2  Journal Identity (Brand / Logo)
   -------------------------------------------------------------------------- */
.isj-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  z-index: 101;
  /* Keep above toggle on mobile */
}

.isj-brand {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  text-decoration: none;
}

/* Typography Lockup */
.isj-brand__typography {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.isj-brand__title {
  display: flex;
  flex-direction: column;
  line-height: 1;
  /* Tighter line-height prevents ascender clipping */
  padding-top: 2px;
  /* Pull text slightly down to clear bounding boxes */
}

.isj-brand__word {
  font-family: var(--font-heading);
  text-transform: uppercase;
  font-weight: var(--weight-bold);
  /* Extra bold */
}

.isj-brand__word--innovative,
.isj-brand__word--solutions {
  color: var(--color-primary-dark);
  font-size: 14px;
  letter-spacing: -0.01em;
}

.isj-brand__word--journal {
  color: var(--color-primary);
  font-size: 9px;
  letter-spacing: 0.28em;
  margin-top: 1px;
}

/* Responsive Scaling */
@media (max-width: 768px) {
  .isj-brand {
    gap: var(--space-3);
  }
}

/* --------------------------------------------------------------------------
   2.3  Mobile Nav Toggle (Hamburger)
   -------------------------------------------------------------------------- */
.isj-header__nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 101;
}

.isj-header__nav-toggle:hover {
  color: var(--color-primary);
  background: var(--color-surface-alt);
}

/* --------------------------------------------------------------------------
   2.4  Mobile Drawer Navigation (Base layout)
   -------------------------------------------------------------------------- */
.isj-header__nav {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 85vw;
  max-width: 400px;
  height: 100vh;
  height: 100dvh;
  background-color: var(--color-surface) !important;
  z-index: 1000;
  transform: translateX(100%);
  transition: transform var(--transition-medium) cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.1);
}

.isj-header__nav--open {
  transform: translateX(0);
}

/* Drawer Header (Close Btn) */
.isj-header__nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.isj-header__nav-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  font-size: var(--text-lg);
  color: var(--color-text-primary);
}

.isj-header__nav-close {
  background: transparent;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.isj-header__nav-close:hover {
  background: var(--color-surface-alt);
  color: var(--color-text-primary);
}

/* Drawer Scrollable Body */
.isj-header__nav-body {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  flex: 1;
  overflow-y: auto;
  background-color: var(--color-surface);
}

/* --------------------------------------------------------------------------
   2.5  Primary Navigation (Base / Mobile)
   -------------------------------------------------------------------------- */
.isj-nav-primary {
  display: flex;
  flex-direction: column;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-4);
}

.isj-nav-primary > li {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  /* allows submenu to drop below link & mobile toggle button */
  align-items: center;
  width: 100%;
}

.isj-nav-primary > li > a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1;
  /* Takes available space */
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-lg);
  /* Slightly larger for premium feel */
  font-weight: var(--weight-semi);
  color: var(--color-text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.isj-nav-primary > li > a:hover {
  background: var(--color-surface-alt);
}

/* Active Page State */
.isj-nav-primary > li > a[aria-current="page"],
body.pkp_page_index .isj-nav-primary .current > a,
body.pkp_page_issue .isj-nav-primary .current > a,
body.pkp_page_about .isj-nav-primary .current > a {
  color: var(--color-primary-dark);
  background: var(--color-primary-bg);
}

/* Premium Mobile Submenu (Accordion) */
.isj-submenu-wrapper {
  width: 100%;
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-medium)
    cubic-bezier(0.4, 0, 0.2, 1);
}

.isj-submenu-wrapper > ul {
  overflow: hidden;
  /* Critical for CSS Grid transition */
  list-style: none;
  padding: 0 0 0 var(--space-4);
  margin: 0 0 0 var(--space-4);
  border-left: 2px solid var(--color-border);
  display: flex;
  flex-direction: column;
}

.isj-submenu--open > .isj-submenu-wrapper {
  grid-template-rows: 1fr;
}

.isj-submenu--open > .isj-submenu-wrapper > ul {
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
  gap: var(--space-1);
}

.isj-submenu-toggle {
  background: transparent;
  border: none;
  color: inherit;
  padding-left: var(--space-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.isj-submenu-icon {
  transition: transform var(--transition-medium) cubic-bezier(0.4, 0, 0.2, 1);
}

.isj-submenu--open > a .isj-submenu-icon {
  transform: rotate(180deg);
}

.isj-submenu-wrapper > ul > li > a {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.isj-submenu-wrapper > ul > li > a:hover {
  color: var(--color-primary-dark);
  background: var(--color-primary-bg);
}

/* --------------------------------------------------------------------------
   2.6  Search Component (Base / Mobile)
   -------------------------------------------------------------------------- */
.isj-header__search-container {
  width: 100%;
}

.isj-search-bar {
  width: 100%;
}

.isj-search-bar__wrapper {
  display: flex;
  align-items: center;
  background: #f9fafb;
  /* Lighter, cleaner gray */
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  border: var(--color-border) 1px solid;
  /* Increased vertical height */
  transition: all var(--transition-fast);
}

.isj-search-bar__wrapper:focus-within {
  background: var(--color-surface);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.1);
}

.isj-search-bar__icon {
  color: var(--color-text-muted);
  margin-right: var(--space-2);
}

.isj-search-bar__wrapper .isj-search-bar__input {
  border: none;
  background: transparent;
  flex: 1;
  font-family: var(--font-body);
  font-size: var(--text-base);
  /* Increased for readability */
  color: var(--color-text-primary);
  outline: none;
  padding: 0;
  margin: 0;
  box-shadow: none;
  line-height: 1.5;
  height: 1.5rem;
}

.isj-search-bar__wrapper .isj-search-bar__input:focus {
  border: none;
  box-shadow: none;
}

.isj-search-bar__wrapper .isj-search-bar__input::placeholder {
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   2.7  User Menu (Base / Mobile)
   Matches DOM: .isj-user-menu > .isj-user-menu__trigger-wrap > [button + ul.isj-user-menu__dropdown]
   -------------------------------------------------------------------------- */
.isj-user-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: auto;
  /* Pushes to bottom of mobile drawer */
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  width: 100%;
}

.isj-user-menu__trigger-wrap {
  width: 100%;
  display: flex;
  flex-direction: column-reverse;
  /* Puts dropdown visually above trigger since it expands upward */
}

.isj-user-menu__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  color: var(--color-white);
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.isj-user-menu__trigger svg {
  color: var(--color-white);
  /* Enforce explicit color inheritance */
  transform: rotate(180deg);
  /* Points UP by default on mobile */
  transition: transform var(--transition-medium) cubic-bezier(0.4, 0, 0.2, 1);
}

.isj-user-menu--open .isj-user-menu__trigger svg {
  transform: rotate(0deg);
  /* Points DOWN when open */
}

/* User Menu Mobile Accordion */
.isj-user-menu__dropdown-wrapper {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-medium)
    cubic-bezier(0.4, 0, 0.2, 1);
  margin-bottom: var(--space-2);
  /* Space between dropdown and trigger below it */
}

.isj-user-menu--open .isj-user-menu__dropdown-wrapper {
  grid-template-rows: 1fr;
}

.isj-user-menu__dropdown {
  overflow: hidden;
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.isj-user-menu__dropdown li a {
  display: block;
  padding: var(--space-3) var(--space-4);
  text-align: center;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
}

.isj-user-menu__dropdown li a:hover {
  background: var(--color-primary-bg);
  color: var(--color-primary-dark);
}

/* Unauthenticated Mobile Links */
.isj-user-menu__link,
.isj-user-menu__login {
  width: 100%;
  text-align: center;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: var(--weight-semi);
  border: 1px solid transparent;
  /* Match box model size */
  transition: all var(--transition-fast);
}

.isj-user-menu__link {
  color: var(--color-text-primary);
  background: var(--color-surface-alt);
}

.isj-user-menu__login {
  color: var(--color-white);
  background: var(--color-primary);
  white-space: nowrap;
  border-color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   2.8  Desktop Layout Override (min-width: 1024px)
   -------------------------------------------------------------------------- */
@media (min-width: 1024px) {
  .isj-header__layout {
    gap: var(--space-12);
    /* Extremely generous spacing between brand and nav on desktop */
  }

  /* Hide Mobile Drawer specific elements */
  .isj-header__nav-toggle,
  .isj-header__overlay,
  .isj-header__nav-header {
    display: none;
  }

  /* Flatten Drawer into inline Flex Row */
  .isj-header__nav {
    position: static;
    transform: none;
    width: auto;
    max-width: none;
    height: auto;
    background: transparent;
    box-shadow: none;
    display: flex;
    flex-direction: row;
    align-items: center;
    flex: 1;
  }

  .isj-header__nav-body {
    padding: 0;
    flex-direction: row;
    align-items: center;
    gap: var(--space-6);
    flex: 1;
    overflow-y: visible;
    justify-content: flex-end;
  }

  /* Desktop Primary Nav */
  .isj-nav-primary {
    flex-direction: row;
    align-items: center;
    gap: var(--space-1);
  }

  .isj-nav-primary > li {
    position: relative;
    /* Anchor for absolute dropdown */
    width: auto;
  }

  .isj-nav-primary > li > a {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    border-radius: var(
      --radius-md
    ); /* Premium rounded corners on hover for desktop */
    flex: none;
    /* Revert mobile flex */
    justify-content: flex-start;
    /* Revert mobile space-between */
    gap: var(--space-1);
    /* Spacing between text and chevron */
    background: transparent;
  }

  /* Hover, Focus, and Active states */
  .isj-nav-primary > li > a:hover,
  .isj-nav-primary > li > a:focus {
    background: var(--color-primary-bg);
    color: var(--color-primary-dark);
  }

  /* Desktop Primary Submenu Dropdown */
  .isj-submenu-wrapper {
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    width: max-content;
    min-width: 220px;

    /* Reset Grid Accordion */
    display: block;
    grid-template-rows: none;

    /* Reveal Animation */
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);

    /* JavaScript handles the hover intent delay. We just run a normal smooth close. */
    transition:
      opacity var(--transition-medium) ease,
      transform var(--transition-medium) cubic-bezier(0.4, 0, 0.2, 1),
      visibility 0s linear var(--transition-medium);
    /* Wait for fade before hiding */
    z-index: 200;
  }

  .isj-has-submenu.isj-desktop-open > .isj-submenu-wrapper {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);

    /* Open state: instantaneous start */
    transition:
      opacity var(--transition-medium) ease,
      transform var(--transition-medium) cubic-bezier(0.4, 0, 0.2, 1),
      visibility 0s linear 0s;
  }

  /* Synchronize Desktop Chevron */
  .isj-has-submenu > a .isj-submenu-icon {
    transition: transform var(--transition-medium) cubic-bezier(0.4, 0, 0.2, 1);
  }

  .isj-has-submenu.isj-desktop-open > a .isj-submenu-icon {
    transform: rotate(180deg);
  }

  .isj-submenu-wrapper > ul {
    overflow: visible;
    /* Revert mobile hidden */
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    padding: var(--space-2) 0;
    margin: 0;
    gap: 0;
    border-left: none;
  }

  .isj-submenu-wrapper > ul > li > a {
    display: block;
    padding: var(--space-2) var(--space-5);
    /* Matched to User Menu Dropdown */
    font-weight: var(--weight-medium);
    /* Match user menu typography */
    color: var(--color-text-secondary);
    border-radius: 0;
  }

  /* The Chevron on Desktop */
  .isj-submenu-toggle {
    padding-left: 0;
    /* Chevron natively sits by text due to flex gap */
  }

  /* Match User Menu Hover */
  .isj-submenu-wrapper > ul > li > a:hover,
  .isj-submenu-wrapper > ul > li > a:focus {
    background: var(--color-primary-bg);
    color: var(--color-primary-dark);
    border: none;
    box-shadow: none;
    outline: none;
  }

  /* Desktop Search */
  .isj-header__search-container {
    width: auto;
    margin-left: auto;
    /* Push user menu and search rightwards if primary nav is short */
  }

  .isj-search-bar__wrapper {
    padding: var(--space-3) var(--space-5);
  }

  .isj-search-bar__wrapper .isj-search-bar__input {
    width: 140px;
    transition: width var(--transition-medium) cubic-bezier(0.4, 0, 0.2, 1);
  }

  .isj-search-bar__wrapper .isj-search-bar__input:focus {
    width: 220px;
  }

  /* Desktop User Menu */
  .isj-user-menu {
    flex-direction: row;
    margin-top: 0;
    padding-top: 0;
    border-top: none;
    width: auto;
    align-items: center;
  }

  .isj-user-menu__trigger-wrap {
    width: auto;
    position: relative;
    /* Anchor for dropdown */
    display: block;
    /* Reset mobile flex column-reverse */
  }

  .isj-user-menu__trigger {
    width: auto;
    padding: var(--space-3) var(--space-4);
    white-space: nowrap;
  }

  .isj-user-menu__trigger:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    box-shadow: 0 4px 12px rgba(46, 125, 50, 0.25);
  }

  /* Reset Desktop User Menu Chevron */
  .isj-user-menu__trigger svg {
    transform: rotate(0deg);
    /* Points down by default on desktop */
    transition: transform var(--transition-medium) cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* Synchronize Desktop Chevron */
  .isj-user-menu__trigger-wrap.isj-desktop-open .isj-user-menu__trigger svg {
    transform: rotate(180deg);
  }

  /* Desktop User Dropdown */
  .isj-user-menu__dropdown-wrapper {
    position: absolute;
    top: calc(100% + var(--space-2));
    right: 0;
    /* Anchor right edge */
    left: auto;
    /* Grows leftward */
    width: max-content;
    min-width: 220px;
    z-index: 200;
    margin-top: 0;

    /* Reset Grid Accordion */
    display: block;
    grid-template-rows: none;

    /* Reveal Animation */
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);

    /* JavaScript handles the hover intent delay. We just run a normal smooth close. */
    transition:
      opacity var(--transition-medium) ease,
      transform var(--transition-medium) cubic-bezier(0.4, 0, 0.2, 1),
      visibility 0s linear var(--transition-medium);
    /* Wait for fade before hiding */
  }

  .isj-user-menu__trigger-wrap.isj-desktop-open
    > .isj-user-menu__dropdown-wrapper {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);

    /* Open state: instantaneous start */
    transition:
      opacity var(--transition-medium) ease,
      transform var(--transition-medium) cubic-bezier(0.4, 0, 0.2, 1),
      visibility 0s linear 0s;
  }

  .isj-user-menu__dropdown {
    overflow: visible;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    padding: var(--space-2) 0;
    margin: 0;
  }

  .isj-user-menu__dropdown li a {
    text-align: left;
    padding: var(--space-2) var(--space-5);
    border-radius: 0;
  }

  .isj-user-menu__dropdown li a:hover {
    background: var(--color-primary-bg);
    color: var(--color-primary-dark);
  }

  /* Desktop Unauthenticated Links */
  .isj-user-menu__link,
  .isj-user-menu__login {
    width: auto;
    padding: var(--space-2) var(--space-6);
    /* Increased horizontal padding for premium feel */
    white-space: nowrap;
  }

  .isj-user-menu__login {
    padding: var(--space-2) 25px;
  }

  .isj-user-menu__link {
    background: transparent;
  }

  .isj-user-menu__link:hover {
    background: var(--color-surface-alt);
  }

  .isj-user-menu__login:hover {
    background: var(--color-primary);
    /* Keep background same to preserve contrast */
    border-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 6px 16px rgba(46, 125, 50, 0.3);
  }
}