/* ==========================================================================
   IGN PLATFORM - LAYOUT & NAVIGATION STYLES
   ==========================================================================
   Header navigation bar, multi-level dropdowns, footer grid layout, and 
   responsive grid utility containers.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. MAIN HEADER & NAVBAR
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--color-primary-slate);
  color: var(--color-text-white);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
  border-bottom: 1px solid var(--color-slate-hover);
}

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

.primary-navigation {
  margin-left: auto;
  margin-right: var(--space-6);
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text-white);
  font-family: var(--font-serif-headline);
  font-weight: 800;
  font-size: var(--text-2xl);
  letter-spacing: -0.02em;
}

.brand-logo .logo-icon {
  background: linear-gradient(135deg, var(--color-accent-orange), #f97316);
  color: #ffffff;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans-body);
  font-weight: 900;
  font-size: 1.25rem;
  background-image: url('../../images/ign-logo.jpeg');
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  font-size: 0;
}

.brand-logo span.highlight {
  color: var(--color-accent-orange);
}

/* Navigation Links & Dropdowns */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  color: #cbd5e1;
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  padding: 0.5rem 0.25rem;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-item.active .nav-link {
  color: var(--color-accent-orange);
}

.secondary-navigation {
  border-top: 1px solid var(--color-slate-hover);
  background-color: var(--color-primary-slate-light);
}

.secondary-navigation-inner {
  display: flex;
  gap: var(--space-8);
  min-height: 44px;
  align-items: center;
}

.secondary-link {
  flex: 0 0 auto;
  color: #cbd5e1;
  text-decoration: none;
  font-size: var(--text-sm);
  padding: 0.75rem 0 0.65rem;
  border-bottom: 2px solid transparent;
}

.secondary-link:hover,
.secondary-link.active {
  color: #ffffff;
  border-bottom-color: var(--color-accent-orange);
}

/* Dropdown Submenu Container */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background-color: var(--color-primary-slate-light);
  border: 1px solid var(--color-slate-hover);
  border-radius: var(--radius-sm);
  padding: var(--space-2) 0;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-normal);
  z-index: 1001;
  list-style: none;
}

.nav-item.has-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: block;
  padding: 0.65rem 1.25rem;
  color: #cbd5e1;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.dropdown-link:hover {
  background-color: var(--color-slate-hover);
  color: var(--color-accent-orange);
}

/* Header Right Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header-actions .header-login {
  color: var(--color-text-white);
  border-color: rgba(255, 255, 255, 0.65);
}

.header-actions .header-login:hover {
  color: var(--color-primary-slate);
  border-color: #ffffff;
  background-color: #ffffff;
}

.header-actions .signed-in-account {
  max-width: 170px;
  overflow: hidden;
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.65);
  text-overflow: ellipsis;
}

.header-actions .signed-in-account:hover {
  color: var(--color-primary-slate);
  border-color: #ffffff;
  background-color: #ffffff;
}

.header-actions .header-signout {
  color: #ffffff;
  border: 1px solid transparent;
  background: transparent;
}

.header-actions .header-signout:hover {
  color: var(--color-accent-orange);
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* --------------------------------------------------------------------------
   2. GRID LAYOUT UTILITIES
   -------------------------------------------------------------------------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.layout-with-sidebar {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-8);
  align-items: start;
}

.resume-editor-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-8);
  align-items: start;
}

.resume-contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.listing-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: var(--space-8);
  align-items: start;
}

.listing-results {
  min-width: 0;
}

.listing-filter-heading,
.listing-results-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.listing-filter-heading h2,
.listing-results-heading h2 {
  margin: 0;
  font-family: var(--font-sans-body);
  font-size: var(--text-lg);
}

.listing-filters {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
}

.listing-filters .form-group {
  margin-top: var(--space-5);
  margin-bottom: 0;
}

.text-button {
  padding: 0;
  border: 0;
  color: var(--color-accent-orange-hover);
  background: transparent;
  text-decoration: underline;
  cursor: pointer;
}

.filter-fieldset {
  margin: var(--space-5) 0 0;
  padding: 0;
  border: 0;
}

.filter-fieldset legend {
  margin-bottom: var(--space-2);
  font-weight: 700;
  font-size: var(--text-sm);
}

.filter-checkbox-list {
  display: grid;
  gap: var(--space-2);
  max-height: 200px;
  overflow-y: auto;
}

.filter-checkbox,
.filter-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-main);
  font-size: var(--text-sm);
}

.filter-toggle {
  margin-top: var(--space-5);
  font-weight: 600;
}

.filter-checkbox input,
.filter-toggle input {
  accent-color: var(--color-accent-orange);
}

.listing-results-heading {
  margin-bottom: var(--space-4);
}

.alert-stub-message {
  margin-bottom: var(--space-4);
  padding: var(--space-3);
  border-left: 3px solid var(--color-accent-orange);
  background: var(--color-bg-alt);
  font-size: var(--text-sm);
}

.no-results-message {
  padding: var(--space-8);
  text-align: center;
  border: 1px dashed var(--color-border-hover);
  border-radius: var(--radius-sm);
}

.no-results-message[hidden] {
  display: none;
}

.pagination-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.opportunity-split-view {
  display: grid;
  grid-template-columns: minmax(270px, 0.82fr) minmax(0, 1.5fr);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  overflow: hidden;
}

.opportunity-list-panel {
  min-width: 0;
  max-height: 78vh;
  overflow-y: auto;
  border-right: 1px solid var(--color-border);
}

.opportunity-list {
  display: grid;
}

.opportunity-list-card {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  outline-offset: -3px;
}

.opportunity-list-card:hover,
.opportunity-list-card.selected {
  background: var(--color-bg-alt);
}

.opportunity-list-card.selected {
  box-shadow: inset 3px 0 var(--color-accent-orange);
}

.opportunity-list-card-top,
.list-card-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.partner-initial {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  color: #ffffff;
  background: var(--color-primary-slate);
  font-weight: 700;
}

.opportunity-list-card .card-bookmark-btn {
  position: static;
  width: 32px;
  height: 32px;
  box-shadow: none;
  background: transparent;
}

.opportunity-list-card h3 {
  margin: var(--space-3) 0 var(--space-1);
  font-family: var(--font-serif-headline);
  font-size: var(--text-base);
  line-height: 1.35;
}

.list-partner-name,
.list-card-facts,
.list-posted-date {
  margin: 0 0 var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.list-card-bottom {
  align-items: flex-start;
  margin-top: var(--space-3);
  font-size: var(--text-xs);
}

.closed-label {
  color: #b42318;
  font-weight: 700;
}

.list-posted-date {
  margin-top: var(--space-3);
  margin-bottom: 0;
}

.opportunity-detail-panel {
  min-width: 0;
  max-height: 78vh;
  overflow-y: auto;
  padding: var(--space-6);
}

.opportunity-detail-content h1 {
  margin: var(--space-3) 0;
  font-size: 1.9rem;
  line-height: 1.2;
}

.detail-topline,
.detail-actions,
.opportunity-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.detail-partner,
.detail-summary {
  color: var(--color-text-muted);
}

.detail-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
  margin: var(--space-6) 0;
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.detail-facts dt {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.detail-facts dd {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  font-weight: 600;
}

.detail-copy {
  margin: var(--space-6) 0;
}

.detail-copy h2,
.related-opportunities h2 {
  font-size: var(--text-lg);
}

.opportunity-tag {
  padding: 0.3rem 0.55rem;
  border-radius: var(--radius-full);
  background: var(--color-bg-alt);
  color: var(--color-text-main);
  font-size: var(--text-xs);
}

.related-opportunities {
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.related-opportunity-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: var(--space-3);
}

.related-opportunity-item {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-main);
  text-decoration: none;
}

.related-opportunity-item:hover {
  border-color: var(--color-accent-orange);
}

.related-opportunity-item span {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.blog-back-link {
  display: inline-block;
  margin-bottom: var(--space-5);
  font-weight: 600;
}

.blog-back-link[hidden],
.blog-article[hidden],
#blog-grid[hidden] {
  display: none;
}

.guide-article-header {
  max-width: 760px;
  margin: 0 auto var(--space-8);
}

.guide-article-header h1 {
  margin: var(--space-3) 0;
  font-size: 2.2rem;
  line-height: 1.2;
}

.guide-category,
.guide-byline {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.guide-article-content {
  max-width: 760px;
  margin: 0 auto var(--space-6);
  font-size: var(--text-lg);
  line-height: 1.8;
}

.guide-excerpt {
  color: var(--color-text-muted);
  line-height: 1.6;
}

.guide-article > .opportunity-tags,
.guide-article > .related-guides {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.detail-actions {
  margin: var(--space-6) 0;
}

.back-to-results {
  display: none;
  margin: var(--space-3);
}

.opportunity-card-partner {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  margin: auto;
  border-radius: var(--radius-sm);
  color: #ffffff;
  background: var(--color-primary-slate);
  font-size: var(--text-xl);
  font-weight: 800;
}

/* --------------------------------------------------------------------------
   3. FOOTER
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-primary-slate);
  color: #94a3b8;
  margin-top: auto;
  border-top: 1px solid var(--color-slate-hover);
}

.footer-top {
  padding-top: var(--space-16);
  padding-bottom: var(--space-12);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-10);
}

.footer-brand p {
  color: #94a3b8;
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  max-width: 320px;
}

.footer-heading {
  color: var(--color-text-white);
  font-family: var(--font-sans-body);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: #94a3b8;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent-orange);
}

.footer-bottom {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-slate-hover);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: #64748b;
}

/* --------------------------------------------------------------------------
   4. RESPONSIVE BREAKPOINTS
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .layout-with-sidebar {
    grid-template-columns: 1fr;
  }

  .listing-layout {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .header-container {
    height: 70px;
    gap: var(--space-3);
  }

  .primary-navigation {
    margin: 0;
  }

  .brand-logo {
    font-size: var(--text-xl);
  }

  .brand-logo .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  .header-actions {
    gap: var(--space-2);
    margin-left: auto;
  }

  .header-actions .btn {
    padding-left: 0.7rem;
    padding-right: 0.7rem;
  }

  .header-actions .signed-in-account {
    max-width: 100px;
  }

  .mobile-nav-toggle {
    display: block;
    order: 3;
    flex: 0 0 auto;
  }

  .header-actions {
    order: 2;
    gap: var(--space-2);
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--color-primary-slate);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-6);
    gap: var(--space-4);
    box-shadow: var(--shadow-lg);
    display: none;
    border-bottom: 1px solid var(--color-slate-hover);
  }

  .nav-menu.open {
    display: flex;
  }

  .site-header:has(.secondary-navigation) .nav-menu {
    top: 112px;
  }

  .secondary-navigation-inner {
    overflow-x: auto;
    gap: var(--space-6);
    min-height: 42px;
    scrollbar-width: thin;
  }

  .secondary-navigation-inner.container {
    width: 100%;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }

  .search-hero-box {
    align-items: stretch;
  }

  .search-hero-input-group,
  .search-hero-input-group[style] {
    flex-basis: 100% !important;
  }

  .search-hero-box .btn {
    width: 100%;
  }

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

  .nav-item.has-dropdown.open .dropdown-menu {
    display: block;
  }

  .grid-3, .grid-2, .grid-4 {
    grid-template-columns: 1fr;
  }

  .layout-with-sidebar {
    gap: var(--space-6);
  }

  .opportunity-split-view {
    display: block;
    border: 0;
    overflow: visible;
  }

  .opportunity-list-panel {
    max-height: none;
    overflow: visible;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
  }

  .opportunity-detail-panel {
    display: none;
    max-height: none;
    overflow: visible;
    padding: var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
  }

  .opportunity-split-view.show-detail-mobile .opportunity-list-panel {
    display: none;
  }

  .opportunity-split-view.show-detail-mobile .opportunity-detail-panel {
    display: block;
  }

  .back-to-results {
    display: inline-flex;
  }

  .detail-facts {
    grid-template-columns: 1fr;
  }

  .resume-editor-layout,
  .resume-contact-grid {
    grid-template-columns: 1fr;
  }

  .card-meta-top,
  .card-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--space-2);
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}