/* ==========================================================================
   Navigation — Header, Footer, Mobile Menu, Dropdowns
   ========================================================================== */

/* --- Main Navigation --- */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-secondary);
  z-index: var(--z-sticky);
  transition: background-color var(--transition-base), border-color var(--transition-base);
  backdrop-filter: blur(8px);
}

[data-theme="dark"] .main-nav {
  background: rgba(12, 10, 9, 0.95);
}

[data-theme="light"] .main-nav {
  background: rgba(250, 250, 249, 0.95);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: var(--text-lg);
  color: var(--text-primary);
  text-decoration: none;
  flex-shrink: 0;
}

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

.nav-logo-text {
  white-space: nowrap;
}

/* Desktop Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: nowrap;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav-link.active {
  font-weight: 600;
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  cursor: pointer;
}

.nav-dropdown-trigger::after {
  content: '▾';
  font-size: 10px;
  margin-left: 2px;
  transition: transform var(--transition-fast);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  z-index: var(--z-dropdown);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-dropdown-item:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.nav-dropdown-item .dropdown-emoji {
  font-size: var(--text-base);
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* Search Toggle Button */
.nav-search-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-lg);
  transition: all var(--transition-fast);
}

.nav-search-toggle:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* Theme Toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-lg);
  transition: all var(--transition-fast);
}

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

/* Random Meme Button */
.random-meme-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: var(--text-lg);
  transition: all var(--transition-fast);
}

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

/* Hamburger */
.hamburger {
  display: none;
  width: 36px;
  height: 36px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.hamburger:hover {
  background: var(--bg-secondary);
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.hamburger.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Mobile Menu Overlay --- */
.mobile-nav {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  z-index: var(--z-overlay);
  overflow-y: auto;
  padding: var(--space-5);
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

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

.mobile-nav-section {
  margin-bottom: var(--space-5);
}

.mobile-nav-section-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border-secondary);
  margin-bottom: var(--space-2);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

/* --- Mobile Search (in mobile menu) --- */
.mobile-search {
  margin-bottom: var(--space-5);
}

/* --- Bottom Bar (Mobile) --- */
.bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-secondary);
  z-index: var(--z-sticky);
}

.bottom-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
  height: 100%;
  max-width: 500px;
  margin: 0 auto;
}

.bottom-bar-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-1) var(--space-3);
  font-size: 20px;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.bottom-bar-link:hover,
.bottom-bar-link.active {
  color: var(--accent-primary);
}

.bottom-bar-label {
  font-size: 10px;
  font-weight: 600;
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-secondary);
  padding: var(--space-8) 0 var(--space-6);
  margin-top: var(--space-9);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}

.footer-section-title {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
}

.footer-link {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-secondary);
}

.footer-bottom-text {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
}

.footer-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-secondary);
}

.footer-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* --- Responsive Navigation --- */
@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-5);
  }
}

@media (max-width: 768px) {
  .bottom-bar {
    display: block;
  }

  .page-content {
    padding-bottom: calc(var(--space-9) + 56px);
  }

  .site-footer {
    padding-bottom: calc(var(--space-6) + 56px);
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .nav-logo-text {
    font-size: var(--text-base);
  }
}