/* ==========================================================================
   ToolKit Layout CSS — Responsive Navigation, Drawer, Grids, Sections & Footer
   ========================================================================== */

.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1 0 auto;
  padding: var(--space-6) 0 var(--space-16);
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.container-narrow {
  max-width: var(--tool-workspace-width);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-xs);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-4);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: var(--font-size-xl);
  color: var(--color-text-main);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.site-logo:hover {
  text-decoration: none;
}

.site-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary), #4f46e5);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-logo-icon svg {
  width: 18px;
  height: 18px;
}

.site-logo-badge {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  border: 1px solid var(--color-primary-border);
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Desktop Navigation & Mega Dropdowns */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-item-dropdown {
  position: relative;
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
  white-space: nowrap;
}

.nav-link-icon {
  width: 16px;
  height: 16px;
  display: inline-flex;
  align-items: center;
  color: var(--color-primary);
}

.nav-chevron {
  transition: transform var(--transition-fast);
  color: var(--color-text-subtle);
  margin-left: 2px;
}

.nav-item-dropdown:hover .nav-chevron,
.nav-item-dropdown:focus-within .nav-chevron {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.nav-link:hover,
.nav-item-dropdown:hover .nav-dropdown-toggle,
.nav-item-dropdown:focus-within .nav-dropdown-toggle {
  color: var(--color-text-main);
  background-color: var(--color-surface-hover);
  text-decoration: none;
}

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

/* Dropdown Flyout Card */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  width: 320px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-normal);
  z-index: 120;
  pointer-events: none;
}

.nav-item-dropdown:hover .nav-dropdown,
.nav-item-dropdown:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(2px);
  pointer-events: auto;
}

.nav-dropdown-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-2);
}

.nav-dropdown-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-main);
}

.nav-dropdown-icon {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
}

.nav-dropdown-count {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  background: var(--color-surface-alt);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.nav-dropdown-grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: 380px;
  overflow-y: auto;
}

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

.nav-dropdown-item:hover {
  background-color: var(--color-surface-hover);
  text-decoration: none;
}

.nav-dropdown-item-icon {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
  margin-top: 2px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-dropdown-item-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.nav-dropdown-item-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-main);
  line-height: 1.3;
}

.nav-dropdown-item-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-dropdown-footer {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.nav-dropdown-footer a {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  display: inline-block;
  padding: 2px 6px;
}

.nav-dropdown-footer a:hover {
  text-decoration: underline;
}

/* Mega Dropdown for 'More Categories' */
.nav-dropdown.nav-dropdown-mega {
  width: 580px;
  max-width: calc(100vw - 32px);
  padding: var(--space-4);
}

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

.nav-dropdown-cat-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  text-decoration: none;
  color: var(--color-text-main);
  transition: all var(--transition-fast);
}

.nav-dropdown-cat-card:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-primary);
  transform: translateY(-1px);
  text-decoration: none;
}

.nav-dropdown-cat-icon {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav-dropdown-cat-content {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}

.nav-dropdown-cat-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: 2px;
}

.nav-dropdown-cat-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-main);
  line-height: 1.3;
}

.nav-dropdown-cat-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-surface-alt);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.nav-dropdown-cat-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header-cta-btn {
  display: inline-flex;
}

@media (max-width: 860px) {
  .header-cta-btn {
    display: none;
  }
}

/* Mobile Hamburger Toggle */
.mobile-nav-toggle {
  display: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  cursor: pointer;
  color: var(--color-text-main);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.mobile-nav-toggle:hover {
  background: var(--color-surface-hover);
}

/* Mobile Drawer & Backdrop */
.mobile-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(3px);
  z-index: 150;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-drawer-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 85%;
  max-width: 340px;
  background: var(--color-surface);
  z-index: 200;
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  padding: var(--space-6) var(--space-5);
  overflow-y: auto;
}

.mobile-drawer.is-open {
  transform: translateX(0);
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.mobile-drawer-close {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  cursor: pointer;
  min-width: 36px;
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* Mobile Accordion */
.mobile-nav-accordion {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-2);
}

.mobile-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-cat-link {
  flex-grow: 1;
  font-size: var(--font-size-base);
  padding: var(--space-2) var(--space-2);
}

.mobile-accordion-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

.mobile-nav-accordion.is-expanded .mobile-accordion-toggle {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.mobile-accordion-content {
  display: none;
  flex-direction: column;
  gap: var(--space-1);
  padding-left: var(--space-4);
  margin-top: var(--space-2);
}

.mobile-nav-accordion.is-expanded .mobile-accordion-content {
  display: flex;
}

.mobile-sub-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.mobile-sub-link:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-primary);
  text-decoration: none;
}

.mobile-sub-icon {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
  display: inline-flex;
}

@media (max-width: 860px) {
  .mobile-nav-toggle {
    display: inline-flex;
  }
  .main-nav {
    display: none;
  }
}

/* ==========================================================================
   Two-Column Tool Page Layout with Sticky Sidebar
   ========================================================================== */
.tool-page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: var(--space-8);
  align-items: start;
}

.tool-main-content {
  min-width: 0;
}

.tool-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.tool-sidebar-sticky {
  position: sticky;
  top: calc(var(--header-height) + var(--space-4));
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.tool-sidebar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-xs);
}

.tool-sidebar-card-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-main);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.tool-sidebar-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

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

.tool-sidebar-link:hover {
  background: var(--color-surface-hover);
  color: var(--color-primary);
  text-decoration: none;
}

.tool-sidebar-link-icon {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
  flex-shrink: 0;
  display: flex;
}

@media (max-width: 980px) {
  .tool-page-layout {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .tool-sidebar-sticky {
    position: static;
  }
}

/* ==========================================================================
   Breadcrumbs Navigation
   ========================================================================== */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumb-separator {
  color: var(--color-text-subtle);
  font-size: 0.8rem;
}

.breadcrumb-current {
  color: var(--color-text-main);
  font-weight: 600;
}

/* ==========================================================================
   Responsive Grid System
   ========================================================================== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

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

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

@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2 {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

/* ==========================================================================
   Sections & Callouts
   ========================================================================== */
.section {
  margin-bottom: var(--space-12);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-2);
}

.section-title {
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.section-subtitle {
  color: var(--color-text-muted);
  font-size: var(--font-size-base);
  margin-top: var(--space-1);
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0 var(--space-8);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}

.footer-col h4 {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-main);
  margin-bottom: var(--space-4);
  font-weight: 700;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

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

.footer-links a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  flex-wrap: wrap;
  gap: var(--space-3);
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

@media (max-width: 540px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}