/* ==========================================================================
   APP LAYOUT & RESPONSIVE GRID
   ========================================================================== */

#app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
}

/* --------------------------------------------------------------------------
   Top Navbar
   -------------------------------------------------------------------------- */
/* --------------------------------------------------------------------------
   Top Navbar (Luminous Glassmorphism with Beautiful Category Accents)
   -------------------------------------------------------------------------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: 60px;
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(190%);
  -webkit-backdrop-filter: blur(24px) saturate(190%);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  transition: background var(--transition-normal), border-color var(--transition-normal);
  box-shadow: 0 4px 20px -4px rgba(15, 23, 42, 0.04), inset 0 -1px 0 0 var(--border-subtle);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Top Rainbow Aura Line */
.app-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2.5px;
  background: linear-gradient(90deg, #3B82F6 0%, #8B5CF6 25%, #EC4899 50%, #F59E0B 75%, #10B981 100%);
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
}

.sidebar-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.sidebar-toggle-btn:hover {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
  border-color: var(--accent-primary-border);
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(99, 102, 241, 0.15);
}

.sidebar-toggle-btn:active {
  transform: translateY(0);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  padding: 4px 8px;
  border-radius: 10px;
  transition: all var(--transition-fast);
}

.logo-link:hover {
  background: var(--bg-surface-hover);
}

.logo-img-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(236, 72, 153, 0.12) 100%);
  border: 1px solid rgba(99, 102, 241, 0.25);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.12);
}

.logo-img {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
  image-rendering: -webkit-optimize-contrast;
  transition: transform var(--transition-fast);
}

.logo-link:hover .logo-img {
  transform: scale(1.1) rotate(-3deg);
}

.logo-text-group {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, #1D4ED8 0%, #7C3AED 50%, #DB2777 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .logo-text {
  background: linear-gradient(135deg, #38BDF8 0%, #A78BFA 50%, #F472B6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-badge {
  font-size: 0.6rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, #6366F1 0%, #EC4899 100%);
  color: #ffffff;
  padding: 2px 6px;
  border-radius: 6px;
  margin-left: 4px;
  text-transform: uppercase;
  box-shadow: 0 2px 6px rgba(99, 102, 241, 0.3);
}

/* Beautiful Category-Colored Quick Hub Pills */
.nav-quick-links {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-left: 0.6rem;
  padding: 3px 4px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
}

.nav-quick-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 5px 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 9px;
  background: transparent;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  white-space: nowrap;
}

.nav-pill-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  transition: transform var(--transition-fast);
}

.nav-pill-icon svg {
  width: 15px;
  height: 15px;
}

/* Individual Color Accents for Navbar Hubs */
#nav-pill-home:hover,
#nav-pill-home.active {
  color: #6366F1;
  background: rgba(99, 102, 241, 0.1);
  border-color: rgba(99, 102, 241, 0.25);
}
#nav-pill-home.active {
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.2);
}

#nav-pill-scientific:hover,
#nav-pill-scientific.active {
  color: #06B6D4;
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.25);
}
#nav-pill-scientific.active {
  box-shadow: 0 2px 8px rgba(6, 182, 212, 0.2);
}

#nav-pill-engineering:hover,
#nav-pill-engineering.active {
  color: #2563EB;
  background: rgba(37, 99, 235, 0.1);
  border-color: rgba(37, 99, 235, 0.25);
}
#nav-pill-engineering.active {
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

#nav-pill-finance:hover,
#nav-pill-finance.active {
  color: #10B981;
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.25);
}
#nav-pill-finance.active {
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.2);
}

#nav-pill-converters:hover,
#nav-pill-converters.active {
  color: #F59E0B;
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.25);
}
#nav-pill-converters.active {
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.2);
}

.nav-quick-pill:hover .nav-pill-icon {
  transform: scale(1.1);
}

/* Header Center - Spotlight Search Trigger with Luminous Aura */
.header-center {
  flex: 1;
  max-width: 380px;
  margin: 0 1.25rem;
}

.search-trigger-btn {
  width: 100%;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0.85rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.03);
}

.search-trigger-btn:hover {
  border-color: #6366F1;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12), 0 4px 12px rgba(99, 102, 241, 0.08);
  color: var(--text-primary);
  background: var(--bg-surface);
}

.search-trigger-content {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.search-icon-sparkle {
  color: #6366F1;
  display: flex;
  align-items: center;
  font-size: 0.95rem;
  transition: transform var(--transition-fast);
}

.search-trigger-btn:hover .search-icon-sparkle {
  transform: scale(1.15) rotate(10deg);
}

.search-icon-sparkle svg {
  width: 16px;
  height: 16px;
}

.nav-search-kbd {
  display: flex;
  align-items: center;
  gap: 3px;
}

.nav-search-kbd kbd {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 2px 5.5px;
  border-radius: 5px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-default);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.1);
  color: var(--text-secondary);
  line-height: 1;
}

/* Header Right - Quick Actions & Theme Toggle */
.header-right {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex-shrink: 0;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  position: relative;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.03);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.icon-btn:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: var(--border-default);
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(15, 23, 42, 0.08);
}

.icon-btn:hover svg {
  transform: scale(1.1);
}

.icon-btn:active {
  transform: translateY(0);
}

/* Favorites Star with Golden Glow */
#nav-fav-link:hover {
  color: #F59E0B;
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.3);
  box-shadow: 0 3px 10px rgba(245, 158, 11, 0.2);
}

.nav-count-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background: linear-gradient(135deg, #F59E0B 0%, #EA580C 100%);
  color: #ffffff;
  font-size: 0.625rem;
  font-weight: 800;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--bg-surface);
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.4);
  line-height: 1;
}

/* Luminous Theme Toggle */
#nav-theme-btn {
  color: #6366F1;
  background: rgba(99, 102, 241, 0.08);
  border-color: rgba(99, 102, 241, 0.2);
}

#nav-theme-btn:hover {
  background: rgba(99, 102, 241, 0.16);
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.25);
  transform: translateY(-1px) rotate(15deg);
}

[data-theme="dark"] #nav-theme-btn {
  color: #FBBF24;
  background: rgba(251, 191, 36, 0.1);
  border-color: rgba(251, 191, 36, 0.25);
}

[data-theme="dark"] #nav-theme-btn:hover {
  background: rgba(251, 191, 36, 0.2);
  border-color: rgba(251, 191, 36, 0.4);
  box-shadow: 0 0 14px rgba(251, 191, 36, 0.35);
}

/* User Account & Sign-in Buttons */
.nav-user-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 36px;
  padding: 0 0.85rem 0 0.45rem;
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.nav-user-pill:hover {
  background: var(--bg-surface-hover);
  border-color: #6366F1;
  transform: translateY(-1px);
  box-shadow: 0 3px 8px rgba(99, 102, 241, 0.15);
}

.nav-user-avatar {
  width: 24px;
  height: 24px;
  border-radius: 7px;
  object-fit: cover;
  border: 1.5px solid #10B981;
}

.nav-user-name {
  max-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-signin-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 36px;
  padding: 0 1.1rem;
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: 10px;
  background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #EC4899 100%);
  color: #ffffff;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
}

.nav-signin-pill svg {
  width: 15px;
  height: 15px;
}

.nav-signin-pill:hover {
  background: linear-gradient(135deg, #4338CA 0%, #6D28D9 50%, #DB2777 100%);
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.45);
  transform: translateY(-1px);
}

.nav-signin-pill:active {
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   Main Workspace Shell (Sidebar + Main Content)
   -------------------------------------------------------------------------- */
.app-body {
  display: flex;
  flex: 1;
  position: relative;
  min-height: calc(100vh - var(--header-height));
}

/* --------------------------------------------------------------------------
   Sidebar Navigation (Vibrant, Colorful & Modern Hierarchical Tree)
   -------------------------------------------------------------------------- */
.app-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-surface);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  height: calc(100vh - var(--header-height));
  position: sticky;
  top: var(--header-height);
  transition: width var(--transition-smooth), transform var(--transition-smooth);
  overflow: hidden;
  z-index: 30;
  box-shadow: 2px 0 12px -2px rgba(15, 23, 42, 0.03);
}

.sidebar-mobile-header {
  display: none;
}

.sidebar-scroll-area {
  flex: 1;
  overflow-y: auto;
  padding: 0.85rem 0.65rem;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border-default) transparent;
}

.sidebar-scroll-area::-webkit-scrollbar {
  width: 4px;
}

.sidebar-scroll-area::-webkit-scrollbar-thumb {
  background: var(--border-default);
  border-radius: 4px;
}

.sidebar-scroll-area::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
}

/* Sidebar Section Headers with Dot Accents */
.nav-section-title {
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0.35rem 0.55rem;
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: opacity var(--transition-fast);
}

.section-count-badge {
  font-size: 0.625rem;
  font-weight: 800;
  padding: 1.5px 7px;
  border-radius: 9999px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(236, 72, 153, 0.12) 100%);
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary-border);
  text-transform: none;
  letter-spacing: normal;
}

.nav-item-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem 0.6rem;
  border-radius: 9px;
  color: var(--text-secondary);
  font-size: 0.84rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
}

.nav-link-main {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.nav-icon-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 8px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-icon-chip svg {
  width: 15px;
  height: 15px;
}

/* Beautiful Rich Colors for Sidebar Quick Chips */
.chip-overview {
  background: rgba(99, 102, 241, 0.15);
  color: #6366F1;
  border: 1px solid rgba(99, 102, 241, 0.25);
}

.chip-favorites {
  background: rgba(245, 158, 11, 0.15);
  color: #F59E0B;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.chip-history {
  background: rgba(139, 92, 246, 0.15);
  color: #8B5CF6;
  border: 1px solid rgba(139, 92, 246, 0.25);
}

.chip-recent {
  background: rgba(16, 185, 129, 0.15);
  color: #10B981;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.chip-settings {
  background: rgba(236, 72, 153, 0.15);
  color: #EC4899;
  border: 1px solid rgba(236, 72, 153, 0.25);
}

.nav-link-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 600;
}

.nav-link:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  transform: translateX(2px);
}

.nav-link:hover .nav-icon-chip {
  transform: scale(1.1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.nav-link.active {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
  font-weight: 700;
  border-color: var(--accent-primary-border);
  box-shadow: 0 1px 3px rgba(99, 102, 241, 0.08);
}

.sidebar-live-pill {
  font-size: 0.625rem;
  font-weight: 800;
  color: #10B981;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 6px;
  padding: 1.5px 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-counter {
  font-size: 0.6875rem;
  padding: 1px 7px;
  border-radius: 9999px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  font-weight: 700;
  border: 1px solid var(--border-subtle);
}

/* Category Accordions in Sidebar with Vibrant Color Touches */
.categories-accordion-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.category-group {
  border-radius: 10px;
  transition: all var(--transition-fast);
}

.category-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.38rem 0.5rem;
  border-radius: 9px;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.category-header:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-subtle);
  transform: translateX(1px);
}

.category-header-title {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: inherit;
  flex: 1;
  min-width: 0;
}

.category-icon-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 8px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.category-icon-chip svg {
  width: 15px;
  height: 15px;
}

.category-header:hover .category-icon-chip {
  transform: scale(1.12);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.category-title-text {
  font-size: 0.835rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.category-header-title.active .category-title-text {
  color: var(--accent-primary);
  font-weight: 700;
}

.category-header-actions {
  display: flex;
  align-items: center;
  gap: 5px;
}

.category-count-chip {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 1.5px 6.5px;
  border-radius: 9999px;
  background: var(--bg-subtle);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
}

.category-chevron-btn {
  background: none;
  border: none;
  padding: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  border-radius: 6px;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.category-chevron-btn:hover {
  color: var(--text-primary);
  background: var(--bg-subtle);
}

.category-chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.category-chevron svg {
  width: 13px;
  height: 13px;
}

.category-group.collapsed .category-chevron {
  transform: rotate(-90deg);
}

.category-group.collapsed .category-items {
  display: none;
}

/* Sub-items (Tree Hierarchy with Color-Tinted Guides) */
.category-items {
  position: relative;
  margin-left: 1.25rem;
  padding-left: 0.75rem;
  border-left: 2px solid var(--border-subtle);
  margin-top: 3px;
  margin-bottom: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-sublink {
  padding: 0.35rem 0.55rem;
  border-radius: 7px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.nav-sublink-icon {
  width: 16px;
  height: 16px;
  opacity: 0.75;
  transition: all var(--transition-fast);
}

.nav-sublink-icon svg {
  width: 13px;
  height: 13px;
}

.nav-sublink:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  transform: translateX(3px);
}

.nav-sublink:hover .nav-sublink-icon {
  opacity: 1;
  color: var(--accent-primary);
  transform: scale(1.1);
}

.nav-sublink.active {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
  font-weight: 700;
  border-color: var(--accent-primary-border);
}

.category-subcount {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
}

.category-view-all {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.35rem 0.55rem;
  font-size: 0.775rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-decoration: none;
  border-radius: 6px;
  margin-top: 2px;
  transition: all var(--transition-fast);
}

.category-view-all:hover {
  background: var(--accent-primary-light);
  color: var(--accent-primary);
  transform: translateX(2px);
}

.category-view-all:hover .view-all-arrow {
  transform: translateX(3px);
}

.view-all-arrow {
  font-weight: 800;
  transition: transform var(--transition-fast);
}

/* Sidebar Collapsed Mode */
body.sidebar-collapsed .app-sidebar {
  width: var(--sidebar-collapsed-width);
}

body.sidebar-collapsed .nav-section-title,
body.sidebar-collapsed .nav-link-text,
body.sidebar-collapsed .nav-counter,
body.sidebar-collapsed .sidebar-live-pill,
body.sidebar-collapsed .category-title-text,
body.sidebar-collapsed .category-header-actions,
body.sidebar-collapsed .category-items,
body.sidebar-collapsed .sidebar-status-card {
  display: none;
}

body.sidebar-collapsed .nav-link {
  justify-content: center;
  padding: 0.55rem 0;
}

body.sidebar-collapsed .category-header {
  justify-content: center;
  padding: 0.45rem 0;
}

/* Sidebar Status Footer - Vibrant Gradient Card */
.sidebar-footer {
  padding: 0.65rem;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
}

.sidebar-status-card {
  padding: 0.65rem 0.8rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(16, 185, 129, 0.08) 100%);
  border: 1px solid rgba(99, 102, 241, 0.2);
  border-radius: 11px;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.sidebar-status-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.1);
}

.sidebar-status-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.775rem;
  font-weight: 700;
  color: var(--text-primary);
}

.sidebar-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #10B981;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.3);
  animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6);
  }
  70% {
    box-shadow: 0 0 0 5px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

.sidebar-status-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.6875rem;
  color: var(--text-secondary);
}

.sidebar-version-badge {
  font-weight: 800;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, #6366F1 0%, #10B981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sidebar-tools-count {
  font-weight: 600;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Main Content Area
   -------------------------------------------------------------------------- */
.app-main {
  flex: 1;
  min-width: 0;
  background: var(--bg-app);
  padding: 2rem 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-y: auto;
}

.main-container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  animation: fadeIn 200ms ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --------------------------------------------------------------------------
   Mobile Backdrop & Bottom Nav
   -------------------------------------------------------------------------- */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  z-index: 25;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--mobile-bottom-bar-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-subtle);
  z-index: 40;
  padding: 0 0.5rem;
  align-items: center;
  justify-content: space-around;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--text-muted);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav-item.active {
  color: var(--accent-primary);
}

/* --------------------------------------------------------------------------
   Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 1200px) {
  .nav-quick-links {
    display: none;
  }
}

@media (max-width: 1024px) {
  .app-main {
    padding: 1.5rem 1.25rem;
  }
  .header-center {
    max-width: 320px;
    margin: 0 0.75rem;
  }
}

@media (max-width: 860px) {
  .nav-currency-pill {
    display: none;
  }
  .logo-tagline {
    display: none;
  }
}

@media (max-width: 768px) {
  .app-header {
    padding: 0 0.65rem;
    height: 56px;
    gap: 0.5rem;
  }

  .header-left {
    gap: 0.45rem;
    flex-shrink: 1;
    min-width: 0;
  }

  .logo-link {
    padding: 2px 4px;
    gap: 0.45rem;
  }

  .logo-img-wrapper {
    width: 30px;
    height: 30px;
  }

  .logo-img {
    width: 20px;
    height: 20px;
  }

  .logo-text {
    font-size: 1.15rem;
  }

  .header-center {
    display: none;
  }

  .header-right {
    gap: 0.35rem;
  }

  .sidebar-toggle-btn,
  .icon-btn {
    width: 34px;
    height: 34px;
  }

  .mobile-search-btn {
    display: flex !important;
  }

  .nav-signin-pill {
    height: 34px;
    padding: 0 0.75rem;
    font-size: 0.75rem;
  }

  .nav-user-pill {
    height: 34px;
    padding: 0 0.6rem 0 0.35rem;
  }

  .logo-pill {
    display: none;
  }

  /* Mobile Sidebar Header */
  .sidebar-mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-surface);
  }

  .sidebar-mobile-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .sidebar-mobile-logo {
    width: 22px;
    height: 22px;
    border-radius: 5px;
  }

  .sidebar-mobile-title {
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #1D4ED8 0%, #7C3AED 50%, #DB2777 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  [data-theme="dark"] .sidebar-mobile-title {
    background: linear-gradient(135deg, #38BDF8 0%, #A78BFA 50%, #F472B6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .sidebar-close-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
  }

  .sidebar-close-btn:hover {
    background: var(--accent-danger-light);
    color: var(--accent-danger);
    border-color: rgba(239, 68, 68, 0.25);
  }

  .app-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: 290px;
    height: 100vh;
    height: 100dvh;
    transform: translateX(-100%);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.35);
    z-index: 100;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  }

  body.sidebar-open {
    overflow: hidden;
  }

  body.sidebar-open .app-sidebar {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 95;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  }

  body.sidebar-open .sidebar-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .app-main {
    padding: 1.25rem 1rem 5.5rem 1rem;
  }

  .mobile-bottom-nav {
    display: flex;
  }
}