/* ==========================================================================
   AI TOTAL HUB (AiTotalHub.) — Design System & Stylesheet
   Color Tokens: #181818 (Canvas), #1f1f1f (Surface), #282828 (Border/Hover)
   Aesthetic: Bloomberg/Editorial Tech Intelligence (Monochrome + Burnt Orange Dot)
   Rules: Strictly NO EMOJIS. Ultra-clean slim monochrome SVG icons only.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Audiowide&family=Chakra+Petch:wght@600;700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&family=Newsreader:ital,opsz,wght@0,6..72,400;0,6..72,600;1,6..72,400&family=Orbitron:wght@600;700;800;900&family=Oxanium:wght@600;700;800&display=swap');

:root {
  /* Core Dark Grays requested by User */
  --bg-canvas: #181818;
  --bg-surface: #1f1f1f;
  --border-color: #282828;
  --hover-surface: #262626;
  --hover-row: #232323;

  /* Inputs & Modals */
  --bg-input: #141414;
  --border-input: #2e2e2e;
  --border-focus: #444444;

  /* Typography */
  --text-primary: #ededed;
  --text-secondary: #a1a1a1;
  --text-dim: #707070;
  --text-inverse: #181818;

  /* Subtle Minimal Accents */
  --accent-primary: #ff4d26;
  /* Signature Burnt Orange */
  --accent-primary-hover: #ff6442;
  --accent-amber: #e5a93c;
  /* Bookmark Active Star */
  --status-green: #30d158;
  /* Live sync dot */

  /* Type Badges */
  --badge-core-bg: #27221d;
  --badge-core-text: #e59344;
  --badge-core-border: #443224;

  --badge-free-bg: #1e261e;
  --badge-free-text: #52c41a;
  --badge-free-border: #273827;

  --badge-freemium-bg: #1a222c;
  --badge-freemium-text: #40a9ff;
  --badge-freemium-border: #223447;

  --badge-paid-bg: #281d28;
  --badge-paid-text: #eb2f96;
  --badge-paid-border: #3d243d;

  /* Metrics & Dimensions */
  --header-height: 64px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;

  /* Fonts */
  --font-serif: 'Newsreader', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

/* --------------------------------------------------------------------------
   CSS Reset & Base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 14px;
  color-scheme: dark;
  scroll-behavior: smooth;
}

/* Accessibility & SEO utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Custom Sleek Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-surface);
}

::-webkit-scrollbar-thumb {
  background: #333333;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #4a4a4a;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  background: none;
  border: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
  outline: none;
}

input,
select {
  font: inherit;
  outline: none;
}

/* --------------------------------------------------------------------------
   SVG Icon Helper Utilities
   -------------------------------------------------------------------------- */
.icon-svg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  vertical-align: middle;
}

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

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

/* --------------------------------------------------------------------------
   Header (GNB & Control Bar)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(24, 24, 24, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-shrink: 0;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  font-family: 'Orbitron', var(--font-sans);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-decoration: none;
  user-select: none;
  color: #ffffff;
  transition: opacity var(--transition-fast);
}

.brand-logo:hover {
  opacity: 0.85;
}

.footer-logo {
  font-family: 'Orbitron', var(--font-sans);
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: #ededed;
}

.live-metrics-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-dim);
  border-left: 1px solid var(--border-color);
  padding-left: 1.25rem;
}

.metric-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.metric-value {
  color: var(--text-secondary);
  font-weight: 500;
}

.status-pulse {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--status-green);
  box-shadow: 0 0 6px rgba(48, 209, 88, 0.6);
  animation: pulseSync 2.5s infinite;
}

@keyframes pulseSync {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.4;
    transform: scale(0.85);
  }
}

.metric-divider {
  color: #333333;
}

/* Header Center (Search Bar) */
.header-center {
  flex: 1;
  max-width: 480px;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

.search-icon {
  position: absolute;
  left: 0.85rem;
  color: var(--text-dim);
  pointer-events: none;
}

.search-input {
  width: 100%;
  height: 36px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  padding: 0 4.5rem 0 2.5rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.search-input::placeholder {
  color: var(--text-dim);
}

.search-input:focus {
  border-color: var(--border-focus);
  background-color: #171717;
  box-shadow: 0 0 0 1px var(--border-focus);
}

.search-kbd {
  position: absolute;
  right: 0.6rem;
  display: inline-flex;
  align-items: center;
  height: 20px;
  padding: 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  background: var(--border-color);
  border-radius: 3px;
  border: 1px solid #363636;
  pointer-events: none;
  user-select: none;
}

/* Header Right (Filters & Language) */
.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.filter-group {
  display: flex;
  align-items: center;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2px;
}

.filter-chip {
  padding: 0.3rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-dim);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  user-select: none;
}

.filter-chip:hover {
  color: var(--text-secondary);
}

.filter-chip.active {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.btn-ctrl {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  height: 34px;
  padding: 0 0.75rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  user-select: none;
}

.btn-ctrl:hover {
  border-color: var(--border-focus);
  color: var(--text-primary);
  background-color: var(--hover-surface);
}

.btn-ctrl.active {
  border-color: var(--accent-amber);
  color: var(--accent-amber);
  background-color: #262118;
}

/* Language Selector Dropdown */
.lang-selector-container {
  position: relative;
}

.lang-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 34px;
  padding: 0 0.75rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
}

.lang-trigger:hover {
  border-color: var(--border-focus);
}

.flag-icon {
  width: 18px;
  height: 12px;
  object-fit: cover;
  border-radius: 2px;
  display: inline-block;
  box-shadow: 0 0 1px rgba(255, 255, 255, 0.2);
}

.lang-dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 175px;
  max-height: 520px;
  overflow-y: auto;
  background-color: #1a1a1a;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  padding: 4px;
  display: none;
  z-index: 200;
}

.lang-dropdown-menu.show {
  display: block;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-align: left;
  transition: all var(--transition-fast);
}

.lang-option:hover {
  background-color: var(--hover-surface);
  color: var(--text-primary);
}

.lang-option.selected {
  background-color: #242424;
  color: var(--text-primary);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Mobile Quick Jump Bar (Sticky on mobile)
   -------------------------------------------------------------------------- */
.mobile-jump-bar {
  display: none;
  position: sticky;
  top: var(--header-height);
  z-index: 90;
  background-color: #161616;
  border-bottom: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  overflow-x: auto;
  gap: 0.5rem;
}

.jump-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.35rem 0.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  white-space: nowrap;
}

.jump-tab:hover,
.jump-tab.active {
  border-color: var(--border-focus);
  color: var(--text-primary);
  background: var(--hover-surface);
}

/* --------------------------------------------------------------------------
   Main Layout: 2x2 Quadrant Grid
   -------------------------------------------------------------------------- */
.app-container {
  flex: 1;
  padding: 1.25rem 1.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.quadrant-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

/* Individual Quadrant Panel */
.quadrant-panel {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  transition: border-color var(--transition-fast);
}

.quadrant-panel:hover {
  border-color: #363636;
}

/* Panel Header */
.panel-header {
  padding: 0.85rem 1.25rem;
  background-color: #1c1c1c;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.panel-title-group {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  text-transform: uppercase;
}

.panel-subtitle {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.panel-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.panel-count-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-color);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
}

/* Table Container & High-Density Spreadsheet */
.table-container {
  flex: 1;
  overflow-y: auto;
  overflow-x: auto;
  max-height: 420px;
}

.editorial-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

.editorial-table th {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: #191919;
  border-bottom: 1px solid var(--border-color);
  padding: 0.6rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  text-transform: uppercase;
  user-select: none;
  white-space: nowrap;
}

.editorial-table td {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid #242424;
  vertical-align: middle;
  color: var(--text-secondary);
}

.editorial-table tr:hover td {
  background-color: var(--hover-row);
  color: var(--text-primary);
}

/* Table Column Widths & Alignments */
.col-bm {
  width: 54px;
  min-width: 54px;
  text-align: center;
  white-space: nowrap;
  padding-left: 0.5rem !important;
  padding-right: 0.5rem !important;
}

.col-tool {
  width: 220px;
  min-width: 200px;
  font-weight: 500;
  white-space: nowrap;
}

.col-summary {
  min-width: 220px;
}

.col-pricing {
  width: 125px;
  min-width: 110px;
  white-space: nowrap;
}

.col-action {
  width: 95px;
  min-width: 95px;
  text-align: right;
  padding-right: 1rem !important;
  white-space: nowrap;
}

/* Bookmark Star Button */
.btn-star {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 3px;
  color: var(--text-dim);
  transition: all var(--transition-fast);
}

.btn-star:hover {
  color: var(--accent-amber);
  background-color: #2b261c;
}

.btn-star.active {
  color: var(--accent-amber);
  fill: var(--accent-amber);
}

.btn-star.active svg {
  fill: var(--accent-amber);
  stroke: var(--accent-amber);
}

/* Tool Identity Block */
.tool-identity {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.tool-favicon {
  width: 16px;
  height: 16px;
  border-radius: 3px;
  flex-shrink: 0;
  background-color: #292929;
}

.tool-name-wrap {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  overflow: hidden;
}

.tool-name {
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tool-rank {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
}

.country-flag {
  width: 14px;
  height: 10px;
  object-fit: cover;
  border-radius: 1px;
  opacity: 0.85;
}

.core-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  padding: 1px 4px;
  border-radius: 2px;
  background-color: var(--badge-core-bg);
  color: var(--badge-core-text);
  border: 1px solid var(--badge-core-border);
  letter-spacing: 0.02em;
}

/* Summary Cell: 2-line clamp */
.summary-cell {
  max-width: 340px;
  font-size: 0.8rem;
  line-height: 1.38;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  word-break: keep-all;
  white-space: normal;
}

/* Pricing Badges */
.price-badge-wrap {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.pricing-badge {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 1px 5px;
  border-radius: 2px;
  letter-spacing: 0.03em;
}

.badge-free {
  background-color: var(--badge-free-bg);
  color: var(--badge-free-text);
  border: 1px solid var(--badge-free-border);
}

.badge-freemium {
  background-color: var(--badge-freemium-bg);
  color: var(--badge-freemium-text);
  border: 1px solid var(--badge-freemium-border);
}

.badge-paid {
  background-color: var(--badge-paid-bg);
  color: var(--badge-paid-text);
  border: 1px solid var(--badge-paid-border);
}

.price-sub {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* Action Outlink Button */
.btn-visit {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.3rem;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-sm);
  background-color: #242424;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-visit:hover {
  background-color: #2e2e2e;
  border-color: var(--border-focus);
  color: var(--text-primary);
}

.btn-visit:active {
  transform: translateY(1px);
}

/* Empty State in Quadrant */
.empty-state {
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* --------------------------------------------------------------------------
   Settings Modal (Sheet Sync)
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

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

.modal-card {
  width: 90%;
  max-width: 540px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
  overflow: hidden;
}

.modal-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
}

.btn-close-modal {
  color: var(--text-dim);
  padding: 0.2rem;
  transition: color var(--transition-fast);
}

.btn-close-modal:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  height: 38px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: var(--radius-md);
  padding: 0 0.85rem;
  color: var(--text-primary);
  font-size: 0.85rem;
}

.form-input:focus {
  border-color: var(--border-focus);
}

.form-help {
  font-size: 0.75rem;
  color: var(--text-dim);
  line-height: 1.4;
}

.modal-footer {
  padding: 1rem 1.5rem;
  background-color: #191919;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

.btn-modal-cancel {
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.btn-modal-cancel:hover {
  background-color: var(--hover-surface);
  color: var(--text-primary);
}

.btn-modal-save {
  padding: 0.5rem 1.25rem;
  background-color: #2b2b2b;
  border: 1px solid #404040;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.btn-modal-save:hover {
  background-color: #383838;
  border-color: #555555;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-canvas);
  color: var(--text-dim);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-right {
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.footer-contact-link {
  color: var(--text-dim);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  transition: color var(--transition-fast);
}

.footer-contact-link:hover {
  color: var(--accent-primary);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Responsive Breakpoints & Universal Mobile Optimization
   -------------------------------------------------------------------------- */
@media (max-width: 1100px) {
  .site-header {
    padding: 0 1.25rem;
    gap: 1rem;
  }

  .header-center {
    max-width: 320px;
  }
}

@media (max-width: 900px) {
  .quadrant-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .table-container {
    max-height: 480px;
  }

  .mobile-jump-bar {
    display: flex;
    position: sticky;
    top: var(--header-height);
    z-index: 85;
    background: rgba(20, 20, 22, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 0.5rem 1rem;
    gap: 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    border-bottom: 1px solid var(--border-color);
  }

  .mobile-jump-bar::-webkit-scrollbar {
    display: none;
  }

  .app-container {
    padding: 0.75rem 1rem 1.75rem;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: auto;
  }

  .site-header {
    height: auto;
    padding: 0.75rem 1rem 0.6rem;
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand actions"
      "search search"
      "filters filters";
    gap: 0.65rem 0.75rem;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(24, 24, 24, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .header-left {
    grid-area: brand;
    gap: 0.5rem;
  }

  .header-left .brand-logo {
    font-size: 1.35rem;
  }

  .header-right {
    grid-area: actions;
    display: flex;
    align-items: center;
    gap: 0.4rem;
  }

  #btn-bookmarks span {
    display: none; /* Icon-only on mobile for sleek spacing */
  }

  .header-center {
    grid-area: search;
    max-width: 100%;
    width: 100%;
  }

  .search-input {
    font-size: 16px; /* Prevents unwanted iOS Safari viewport auto-zoom */
    height: 38px;
  }

  /* Horizontal Scrollable Price Chips on Mobile */
  .filter-group {
    grid-area: filters;
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 2px;
    gap: 0.4rem;
    width: 100%;
  }

  .filter-group::-webkit-scrollbar {
    display: none;
  }

  .filter-chip {
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    white-space: nowrap;
    flex-shrink: 0;
  }

  .mobile-jump-bar {
    top: 0;
    padding: 0.45rem 1rem;
    gap: 0.4rem;
  }

  .jump-tab {
    padding: 0.35rem 0.75rem;
    font-size: 0.72rem;
  }

  /* Compact Table Layout on Mobile */
  .col-summary {
    display: none; /* Keeps high-density layout clean on small screens */
  }

  .editorial-table th,
  .editorial-table td {
    padding: 0.65rem 0.5rem;
  }

  .tool-identity {
    max-width: 140px;
  }

  .tool-name {
    font-size: 0.85rem;
  }

  .pricing-badge {
    font-size: 0.65rem;
    padding: 1px 4px;
  }

  .price-sub {
    font-size: 0.65rem;
  }

  .btn-visit {
    padding: 0.35rem 0.6rem;
    font-size: 0.7rem;
  }

  .col-bm {
    width: 46px;
    min-width: 46px;
    white-space: nowrap;
  }

  .btn-star {
    padding: 0.2rem;
  }

  .site-footer {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
    padding: 1.5rem 1rem max(1.5rem, env(safe-area-inset-bottom));
  }

  .footer-left {
    flex-direction: column;
    gap: 0.4rem;
  }
}

/* Extra-Small Phones (e.g., iPhone SE, Galaxy Z Flip Cover, 360px - 380px) */
@media (max-width: 380px) {
  .header-left .brand-logo {
    font-size: 1.15rem;
  }

  .editorial-table th,
  .editorial-table td {
    padding: 0.5rem 0.35rem;
  }

  .tool-identity {
    max-width: 110px;
  }

  .btn-visit span {
    display: none; /* Icon-only visit arrow on ultra-narrow phones */
  }

  .btn-visit {
    padding: 0.35rem;
  }
}