/* ============================================
   OSINT Webutation Framework — Layout
   ============================================ */

/* Top Navigation Bar */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-nav);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  z-index: 1000;
  padding: 0 var(--space-lg);
}

.top-nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-right: var(--space-lg);
  flex-shrink: 0;
}

.top-nav__brand-name {
  display: flex;
  align-items: center;
  gap: 0;
  white-space: nowrap;
  text-decoration: none;
}

.brand-osint {
  font-size: 0.95rem;
  font-weight: 800;
  color: #ffffff;
  background: var(--accent-blue);
  padding: 4px 8px;
  border-radius: 6px 0 0 6px;
  letter-spacing: 1.5px;
  line-height: 1;
}

.brand-sep {
  width: 0;
}

.brand-webutation {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-blue);
  background: #e9eff5;
  padding: 4px 10px;
  border-radius: 0 6px 6px 0;
  letter-spacing: 0.5px;
  line-height: 1;
}

.top-nav__categories {
  display: flex;
  align-items: center;
  flex: 1;
  gap: 4px;
  min-width: 0;
}

/* Direct category links */
.top-nav__cat-link {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-xs);
  color: var(--text-secondary);
  white-space: nowrap;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  font-weight: 500;
}

.top-nav__cat-link:hover {
  color: var(--text-heading);
  background: var(--bg-card-hover);
}

.top-nav__cat-link--active {
  color: #ffffff;
  background: var(--accent-blue);
}

.top-nav__cat-link--active:hover {
  color: #ffffff;
  background: #1d4278;
}

/* Dropdown groups */
.top-nav__dropdown {
  position: relative;
  flex-shrink: 0;
}

.top-nav__dropdown-btn {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-xs);
  color: var(--text-secondary);
  white-space: nowrap;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 2px;
}

.top-nav__dropdown-btn:hover {
  color: var(--text-heading);
  background: var(--bg-card-hover);
}

.top-nav__dropdown-btn--active {
  color: var(--accent-blue);
  font-weight: 700;
}

.top-nav__dropdown-arrow {
  font-size: 0.6rem;
  margin-left: 2px;
}

.top-nav__dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 320px;
  max-height: 70vh;
  overflow-y: auto;
  z-index: 1001;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}

/* Invisible bridge that covers the gap between button and menu */
.top-nav__dropdown-menu::before {
  content: '';
  position: absolute;
  top: -10px;
  left: 0;
  right: 0;
  height: 10px;
}

.top-nav__dropdown-menu--open,
.top-nav__dropdown:hover .top-nav__dropdown-menu,
.top-nav__dropdown:focus-within .top-nav__dropdown-menu {
  display: block;
}

.top-nav__dropdown-item {
  display: block;
  padding: var(--space-sm) var(--space-md);
  color: var(--text-primary);
  font-size: var(--font-sm);
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition-fast);
  white-space: nowrap;
}

.top-nav__dropdown-item:last-child {
  border-bottom: none;
}

.top-nav__dropdown-item:hover {
  background: var(--bg-card-hover);
  color: var(--text-heading);
}

.top-nav__dropdown-item--active {
  color: var(--accent-blue);
  font-weight: 600;
  background: #eef1ff;
}

.top-nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-left: var(--space-md);
  flex-shrink: 0;
}

/* ─── "More" Overflow Dropdown ──────────────────── */

.top-nav__more {
  flex-shrink: 0;
}

/* The "More" menu aligns to the right so it doesn't overflow viewport */
.top-nav__more .top-nav__dropdown-menu {
  left: auto;
  right: 0;
  min-width: 280px;
}

/* Section labels for flattened group headers inside "More" */
.top-nav__more-section-label {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-xs);
  font-weight: 700;
  color: var(--text-heading);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.55;
  border-top: 1px solid var(--border-light);
  margin-top: var(--space-xs);
}

.top-nav__more-section-label:first-child {
  border-top: none;
  margin-top: 0;
}

/* ─── Hamburger Button (mobile) ─────────────────── */

.top-nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
  margin-right: var(--space-sm);
  padding: 0;
  flex-shrink: 0;
}

.top-nav__hamburger:hover {
  background: var(--bg-card-hover);
}

.top-nav__hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 1px;
  transition: all 200ms ease;
}

/* Animated X when open */
.top-nav__hamburger--active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.top-nav__hamburger--active span:nth-child(2) {
  opacity: 0;
}

.top-nav__hamburger--active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ─── Mobile Menu Panel ─────────────────────────── */

.top-nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-secondary);
  z-index: 999;
  overflow-y: auto;
  padding: var(--space-md) 0;
  box-shadow: var(--shadow-lg);
}

.top-nav__mobile-menu--open {
  display: block;
}

.top-nav__mobile-item {
  display: block;
  padding: var(--space-sm) var(--space-lg);
  color: var(--text-primary);
  font-size: var(--font-sm);
  border-bottom: 1px solid var(--border-light);
  transition: background var(--transition-fast);
  text-decoration: none;
}

.top-nav__mobile-item:hover {
  background: var(--bg-card-hover);
  color: var(--text-heading);
}

.top-nav__mobile-item--active {
  color: var(--accent-blue);
  font-weight: 600;
  background: #eef1ff;
}

.top-nav__mobile-section-label {
  padding: var(--space-sm) var(--space-lg);
  padding-top: var(--space-md);
  font-size: var(--font-xs);
  font-weight: 700;
  color: var(--text-heading);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.55;
  border-top: 1px solid var(--border-color);
  margin-top: var(--space-xs);
}

.top-nav__mobile-section-label:first-child {
  border-top: none;
  margin-top: 0;
}

/* ─── Main Content Area ─────────────────────────── */

.main-content {
  margin-top: var(--nav-height);
  padding: var(--space-lg);
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

/* Index Page - Two Column Layout */
.index-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-lg);
  align-items: start;
}

/* Category Page - Multi Column Layout */
.category-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-lg);
  align-items: start;
}

.category-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

/* ─── Responsive ────────────────────────────────── */

@media (max-width: 1200px) {
  .category-columns {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .index-layout {
    grid-template-columns: 1fr;
  }

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

  .top-nav__categories {
    display: none;
  }

  .top-nav__hamburger {
    display: flex;
  }

  /* Hide "More" on mobile — hamburger handles everything */
  .top-nav__more {
    display: none !important;
  }

  .top-nav__brand-name {
    font-size: var(--font-xs);
  }

  .hero {
    padding: 40px var(--space-lg);
  }

  .hero__title {
    font-size: 1.8rem;
  }
}

@media (max-width: 600px) {
  .main-content {
    padding: var(--space-md);
  }

  .top-nav {
    padding: 0 var(--space-md);
  }

  .hero__title {
    font-size: 1.4rem;
  }

  .hero__subtitle {
    font-size: var(--font-sm);
  }
}