/* ==========================================================================
   BitzNet Modern Reference Library - Design System & Stylesheet
   Palette:
     Warm Paper: #F6F1E7
     Dark Walnut: #3A332B
     Muted Ultramarine: #536C9A
     Parchment White: #FFFCF7
   ========================================================================== */

:root {
  --color-paper: #F6F1E7;
  --color-walnut: #3A332B;
  --color-walnut-muted: #5C5349;
  --color-walnut-light: #7E7367;
  --color-ultramarine: #536C9A;
  --color-ultramarine-dark: #3F5275;
  --color-ultramarine-light: #EBF0F7;
  --color-parchment: #FFFCF7;
  --color-rule: #DFD7CA;
  --color-rule-dark: #3A332B;
  --color-rule-subtle: #EBE5DB;
  --color-card-border: #D8CEBE;

  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", "STSong", "Songti", Georgia, serif;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --h1-desktop: 48px;
  --h1-mobile: 33px;
  --body-size: 18px;
  --line-height-body: 1.75;
  --line-height-heading: 1.3;

  --max-width: 1240px;
  --container-padding: 24px;
  --radius-panel: 3px;
  --radius-tag: 2px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--color-paper);
  color: var(--color-walnut);
  font-family: var(--font-sans);
  font-size: var(--body-size);
  line-height: var(--line-height-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

/* Accessible Skip Navigation */
.skip-link {
  position: absolute;
  top: -60px;
  left: 24px;
  background: var(--color-walnut);
  color: var(--color-parchment);
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 14px;
  z-index: 9999;
  text-decoration: none;
  border-radius: var(--radius-tag);
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 16px;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, .serif-heading {
  font-family: var(--font-serif);
  color: var(--color-walnut);
  line-height: var(--line-height-heading);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: var(--h1-mobile);
  margin-bottom: 1.25rem;
}

@media (min-width: 769px) {
  h1 {
    font-size: var(--h1-desktop);
  }
}

h2 {
  font-size: 28px;
  margin-bottom: 1rem;
}

@media (min-width: 769px) {
  h2 {
    font-size: 34px;
  }
}

h3 {
  font-size: 22px;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: 18px;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1.25rem;
  color: var(--color-walnut);
  font-size: var(--body-size);
}

a {
  color: var(--color-ultramarine);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

a:hover {
  color: var(--color-ultramarine-dark);
}

.mono-num {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   Quiet Horizontal "Shelf" Rhythm & Section Layout
   -------------------------------------------------------------------------- */
.shelf-divider {
  width: 100%;
  height: 1px;
  background-color: var(--color-rule);
  border: none;
  margin: 0;
}

.shelf-divider-thick {
  width: 100%;
  height: 2px;
  background-color: var(--color-walnut);
  border: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section-shelf {
  padding: 64px 0;
  border-bottom: 1px solid var(--color-rule);
  position: relative;
}

@media (min-width: 769px) {
  .section-shelf {
    padding: 88px 0;
  }
}

/* Section Header with Side Index Rhythm */
.shelf-header {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--color-rule);
  padding-bottom: 24px;
}

@media (min-width: 769px) {
  .shelf-header {
    grid-template-columns: 220px 1fr;
    gap: 40px;
    align-items: baseline;
  }
}

.shelf-index-col {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.shelf-index-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-ultramarine);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: relative;
  display: inline-block;
  padding-bottom: 4px;
}

/* Animate section-index underlines only */
.shelf-index-label::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--color-ultramarine);
  transition: width 0.35s cubic-bezier(0.25, 1, 0.5, 1);
}

.section-shelf:hover .shelf-index-label::after,
.shelf-header:hover .shelf-index-label::after {
  width: 100%;
}

.shelf-title-col h2 {
  margin-bottom: 8px;
}

.shelf-subtitle {
  font-size: 17px;
  color: var(--color-walnut-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--color-paper);
  border-bottom: 1px solid var(--color-rule);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--color-walnut);
}

.site-brand svg {
  display: block;
}

.site-nav {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-link {
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--color-walnut);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-ultramarine);
  transition: width 0.25s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.header-cta-group {
  display: none;
  align-items: center;
  gap: 14px;
}

@media (min-width: 1024px) {
  .site-nav {
    display: block;
  }
  .header-cta-group {
    display: flex;
  }
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-tag);
  cursor: pointer;
  padding: 10px;
  color: var(--color-walnut);
}

.mobile-nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-walnut);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.mobile-nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 1024px) {
  .mobile-nav-toggle {
    display: none;
  }
}

/* Mobile Menu Overlay */
.mobile-nav-drawer {
  display: none;
  background-color: var(--color-parchment);
  border-bottom: 2px solid var(--color-walnut);
  padding: 24px;
}

.mobile-nav-drawer.is-open {
  display: block;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.mobile-nav-list a {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--color-walnut);
  text-decoration: none;
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-rule-subtle);
}

.mobile-nav-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   Buttons & CTAs
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-panel);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  line-height: 1.2;
  text-align: center;
}

.btn-primary {
  background-color: var(--color-walnut);
  color: var(--color-parchment);
  border: 1px solid var(--color-walnut);
}

.btn-primary:hover {
  background-color: #241f1a;
  color: #FFFFFF;
  border-color: #241f1a;
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-walnut);
  border: 1px solid var(--color-walnut);
}

.btn-secondary:hover {
  background-color: var(--color-parchment);
  color: var(--color-ultramarine);
}

.btn-accent {
  background-color: var(--color-ultramarine);
  color: #FFFFFF;
  border: 1px solid var(--color-ultramarine);
}

.btn-accent:hover {
  background-color: var(--color-ultramarine-dark);
  color: #FFFFFF;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   Hero Section: Left Text / Right Reference Drawers Dashboard
   -------------------------------------------------------------------------- */
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: 1.05fr 1fr;
    gap: 48px;
  }
}

.hero-meta-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-ultramarine);
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  padding: 6px 12px;
  margin-bottom: 20px;
  border-radius: var(--radius-tag);
}

.hero-meta-dot {
  width: 6px;
  height: 6px;
  background-color: var(--color-ultramarine);
  border-radius: 50%;
}

.hero-lead {
  font-size: 19px;
  color: var(--color-walnut-muted);
  line-height: 1.8;
  margin-bottom: 28px;
}

.hero-cta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 32px;
}

.hero-spec-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  border-top: 1px solid var(--color-rule);
  padding-top: 24px;
}

.hero-spec-item {
  display: flex;
  flex-direction: column;
}

.hero-spec-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-ultramarine);
  margin-bottom: 4px;
}

.hero-spec-desc {
  font-size: 14px;
  color: var(--color-walnut-muted);
}

/* Right Dashboard: Reference Drawers with Region Tabs */
.dashboard-cabinet {
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-panel);
  box-shadow: 0 4px 16px rgba(58, 51, 43, 0.05);
  overflow: hidden;
}

.cabinet-top-rail {
  background-color: #EFE8DC;
  border-bottom: 1px solid var(--color-card-border);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cabinet-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-walnut);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cabinet-edition {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-walnut-muted);
}

/* Region Tabs (Hong Kong, Japan, Singapore, US) */
.drawer-tabs {
  display: flex;
  background-color: #F0ECE4;
  border-bottom: 1px solid var(--color-card-border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.drawer-tab {
  flex: 1;
  min-width: 90px;
  padding: 12px 14px;
  text-align: center;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-walnut-muted);
  background: transparent;
  border: none;
  border-right: 1px solid var(--color-card-border);
  cursor: pointer;
  position: relative;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.drawer-tab:last-child {
  border-right: none;
}

.drawer-tab:hover {
  color: var(--color-walnut);
  background-color: rgba(255, 252, 247, 0.5);
}

.drawer-tab.is-active {
  background-color: var(--color-parchment);
  color: var(--color-walnut);
  font-weight: 700;
}

.drawer-tab.is-active::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-ultramarine);
}

/* Drawer Content Panel */
.drawer-panel {
  padding: 24px;
  display: none;
}

.drawer-panel.is-active {
  display: block;
}

.drawer-heading-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 16px;
  border-bottom: 1px dashed var(--color-rule);
  padding-bottom: 12px;
}

.drawer-region-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-walnut);
}

.drawer-catalog-id {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ultramarine);
}

.drawer-spec-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: 20px;
}

@media (min-width: 480px) {
  .drawer-spec-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.drawer-spec-box {
  background-color: var(--color-paper);
  border: 1px solid var(--color-rule-subtle);
  padding: 12px;
  border-radius: var(--radius-tag);
}

.drawer-spec-box dt {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-walnut-light);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.drawer-spec-box dd {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-walnut);
}

.drawer-notes {
  font-size: 14px;
  color: var(--color-walnut-muted);
  line-height: 1.6;
  background-color: #FAF6EF;
  border-left: 3px solid var(--color-ultramarine);
  padding: 10px 14px;
  margin-bottom: 16px;
}

.drawer-footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-walnut-light);
  border-top: 1px solid var(--color-rule-subtle);
  padding-top: 12px;
}

/* --------------------------------------------------------------------------
   Advantages: Three Differently Sized Chapters
   -------------------------------------------------------------------------- */
.chapters-container {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.chapter-box {
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-panel);
  position: relative;
  overflow: hidden;
}

/* Chapter 1: Large Broad Chapter */
.chapter-large {
  padding: 36px 32px;
  border-left: 4px solid var(--color-walnut);
}

.chapter-large .chapter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 860px) {
  .chapter-large .chapter-grid {
    grid-template-columns: 1.4fr 1fr;
    gap: 40px;
    align-items: center;
  }
}

/* Chapter 2: Medium Chapter */
.chapter-medium {
  padding: 30px 28px;
  border-left: 4px solid var(--color-ultramarine);
}

.chapter-medium .chapter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 860px) {
  .chapter-medium .chapter-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* Chapter 3: Compact Reference Chapter */
.chapter-compact {
  padding: 24px 24px;
  border-left: 4px solid var(--color-walnut-muted);
}

.chapter-compact .chapter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 860px) {
  .chapter-compact .chapter-grid {
    grid-template-columns: 240px 1fr;
    gap: 32px;
    align-items: center;
  }
}

.chapter-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ultramarine);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
  display: block;
}

.chapter-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chapter-features-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 15px;
  color: var(--color-walnut);
}

.chapter-features-list li::before {
  content: "—";
  color: var(--color-ultramarine);
  font-family: var(--font-mono);
}

.chapter-data-sheet {
  background-color: var(--color-paper);
  border: 1px solid var(--color-card-border);
  padding: 20px;
  border-radius: var(--radius-tag);
}

.data-sheet-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--color-walnut);
  border-bottom: 1px solid var(--color-rule);
  padding-bottom: 8px;
  margin-bottom: 12px;
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   Global Nodes: Systematic Regional Reference
   -------------------------------------------------------------------------- */
.nodes-table-wrap {
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-panel);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.catalog-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 15px;
}

.catalog-table th {
  background-color: #EDE6D9;
  color: var(--color-walnut);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 14px 18px;
  border-bottom: 2px solid var(--color-walnut);
  white-space: nowrap;
}

.catalog-table td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--color-rule);
  color: var(--color-walnut);
  vertical-align: middle;
}

.catalog-table tr:last-child td {
  border-bottom: none;
}

.catalog-table tr:hover td {
  background-color: #FAF7F0;
}

.node-region-cell {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.node-flag-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 6px;
  background-color: var(--color-paper);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-tag);
  color: var(--color-ultramarine);
}

.spec-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 3px 8px;
  background: var(--color-ultramarine-light);
  color: var(--color-ultramarine-dark);
  border-radius: var(--radius-tag);
}

/* --------------------------------------------------------------------------
   AI & Streaming: Two Reading Spreads
   -------------------------------------------------------------------------- */
.reading-spreads-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 960px) {
  .reading-spreads-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

.reading-spread-page {
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-panel);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.spread-page-header {
  border-bottom: 2px solid var(--color-walnut);
  padding-bottom: 16px;
  margin-bottom: 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.spread-cat-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-ultramarine);
  letter-spacing: 0.1em;
}

.spread-items-catalog {
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex: 1;
}

.spread-entry {
  border-bottom: 1px solid var(--color-rule-subtle);
  padding-bottom: 16px;
}

.spread-entry:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.spread-entry-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 6px;
  color: var(--color-walnut);
}

.spread-entry-target {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ultramarine);
}

.spread-entry-body {
  font-size: 15px;
  color: var(--color-walnut-muted);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Pricing: Catalog Comparison Sheet
   -------------------------------------------------------------------------- */
.pricing-disclaimer {
  background-color: #FAF4EB;
  border-left: 3px solid var(--color-walnut);
  padding: 14px 18px;
  font-size: 14px;
  color: var(--color-walnut-muted);
  margin-bottom: 32px;
  line-height: 1.6;
}

.pricing-catalog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 680px) {
  .pricing-catalog-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1040px) {
  .pricing-catalog-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.catalog-plan-card {
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-panel);
  display: flex;
  flex-direction: column;
  padding: 28px 22px;
  position: relative;
  transition: border-color 0.2s ease;
}

.catalog-plan-card.featured-plan {
  border: 2px solid var(--color-ultramarine);
}

.plan-header-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ultramarine);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.plan-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-walnut);
}

.plan-price-box {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-rule);
}

.plan-price-num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-walnut);
  display: flex;
  align-items: baseline;
  gap: 2px;
}

.plan-price-num .currency {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-walnut-muted);
}

.plan-price-num .plan-price-unit {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-walnut-muted);
  margin-left: 2px;
}

.plan-price-note {
  display: block;
  font-size: 13px;
  color: var(--color-walnut-light);
  margin-top: 6px;
  line-height: 1.5;
}

.plan-specs-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  flex: 1;
}

.plan-specs-list li {
  font-size: 14px;
  color: var(--color-walnut);
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.plan-specs-list li::before {
  content: "•";
  color: var(--color-ultramarine);
}

/* --------------------------------------------------------------------------
   Nine SEO Content Cards: Below Pricing (3 desktop / 2 tablet / 1 mobile)
   -------------------------------------------------------------------------- */
.seo-articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .seo-articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .seo-articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.seo-card {
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-panel);
  display: flex;
  flex-direction: column;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  position: relative;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.seo-card:hover {
  border-color: var(--color-walnut);
  background-color: #FFFFFF;
}

.seo-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.seo-card-cat {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ultramarine);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.seo-card-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-walnut-light);
}

.seo-card-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-walnut);
  line-height: 1.4;
  margin-bottom: 12px;
}

.seo-card-summary {
  font-size: 15px;
  color: var(--color-walnut-muted);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.seo-card-footer {
  border-top: 1px solid var(--color-rule-subtle);
  padding-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-ultramarine);
}

.seo-card-arrow {
  transition: transform 0.2s ease;
}

.seo-card:hover .seo-card-arrow {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   Testimonials: Authentic / Explicitly Sample Testimonials
   -------------------------------------------------------------------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-panel);
  padding: 24px;
  display: flex;
  flex-direction: column;
}

.testimonial-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-ultramarine);
  margin-bottom: 12px;
}

.testimonial-quote {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-walnut);
  margin-bottom: 18px;
  flex: 1;
  font-style: normal;
}

.testimonial-author-box {
  border-top: 1px solid var(--color-rule-subtle);
  padding-top: 12px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.testimonial-author {
  font-weight: 600;
  font-size: 14px;
  color: var(--color-walnut);
}

.testimonial-role {
  font-size: 12px;
  color: var(--color-walnut-light);
}

/* --------------------------------------------------------------------------
   FAQ Accordion
   -------------------------------------------------------------------------- */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 920px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-panel);
  overflow: hidden;
}

.faq-trigger {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-walnut);
  gap: 16px;
}

.faq-trigger:hover {
  color: var(--color-ultramarine);
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-ultramarine);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.faq-item.is-expanded .faq-icon {
  transform: rotate(45deg);
}

.faq-panel {
  display: none;
  padding: 0 24px 20px 24px;
  border-top: 1px solid var(--color-rule-subtle);
  font-size: 16px;
  color: var(--color-walnut-muted);
  line-height: 1.7;
}

.faq-item.is-expanded .faq-panel {
  display: block;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  background-color: #EDE6D9;
  border-top: 2px solid var(--color-walnut);
  padding: 64px 0 32px 0;
  margin-top: auto;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-bottom: 48px;
}

@media (min-width: 768px) {
  .footer-top-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

.footer-brand-col p {
  font-size: 15px;
  color: var(--color-walnut-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-walnut);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-card-border);
  padding-bottom: 8px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links-list a {
  font-size: 15px;
  color: var(--color-walnut);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* PBN Friendly Links Highlight */
.pbn-link-item a {
  color: var(--color-ultramarine-dark);
  font-weight: 600;
}

.footer-bottom-bar {
  border-top: 1px solid var(--color-card-border);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 13px;
  color: var(--color-walnut-light);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom-bar {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* --------------------------------------------------------------------------
   Article Page Template Specific Styles
   -------------------------------------------------------------------------- */
.article-header-area {
  padding: 48px 0 32px 0;
  border-bottom: 1px solid var(--color-rule);
}

.breadcrumb-nav {
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.breadcrumb-nav ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.breadcrumb-nav li+li::before {
  content: "/";
  color: var(--color-walnut-light);
  margin-right: 8px;
}

.breadcrumb-nav a {
  color: var(--color-walnut-muted);
  text-decoration: none;
}

.breadcrumb-nav a:hover {
  color: var(--color-ultramarine);
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-walnut-light);
  margin-bottom: 20px;
}

.article-lead {
  font-size: 19px;
  line-height: 1.8;
  color: var(--color-walnut-muted);
  background-color: var(--color-parchment);
  border-left: 3px solid var(--color-ultramarine);
  padding: 16px 20px;
  margin-bottom: 32px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding: 48px 0;
}

@media (min-width: 992px) {
  .article-layout {
    grid-template-columns: 1fr 300px;
    gap: 48px;
  }
}

.article-body {
  font-size: 18px;
  line-height: 1.85;
}

.article-body h2 {
  font-size: 26px;
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-rule);
}

.article-body h3 {
  font-size: 20px;
  margin-top: 28px;
  margin-bottom: 12px;
}

.article-body ul, .article-body ol {
  margin-left: 24px;
  margin-bottom: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  background-color: var(--color-parchment);
  border-left: 4px solid var(--color-walnut);
  padding: 16px 22px;
  margin: 24px 0;
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--color-walnut);
}

.article-body code {
  font-family: var(--font-mono);
  font-size: 14px;
  background-color: #ECE5D8;
  padding: 2px 6px;
  border-radius: var(--radius-tag);
}

.article-body pre {
  background-color: var(--color-walnut);
  color: var(--color-parchment);
  padding: 18px;
  border-radius: var(--radius-panel);
  overflow-x: auto;
  margin: 24px 0;
}

.article-body pre code {
  background-color: transparent;
  color: inherit;
  padding: 0;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.sidebar-box {
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-panel);
  padding: 22px;
}

.sidebar-box-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-walnut);
  text-transform: uppercase;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--color-rule);
  padding-bottom: 6px;
}

.related-articles-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.related-articles-list a {
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-walnut);
  text-decoration: none;
}

.related-articles-list a:hover {
  color: var(--color-ultramarine);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   General Static Pages (About, Terms, Privacy, Sitemap, Tutorial)
   -------------------------------------------------------------------------- */
.static-page-content {
  background-color: var(--color-parchment);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-panel);
  padding: 36px 30px;
  margin: 40px 0 60px 0;
}

@media (min-width: 768px) {
  .static-page-content {
    padding: 48px 40px;
  }
}

.static-page-content h2 {
  font-size: 24px;
  margin-top: 32px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--color-rule);
  padding-bottom: 8px;
}

.static-page-content p {
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 18px;
}

/* --------------------------------------------------------------------------
   Accessibility & Mobile Safe Overflows
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-ultramarine);
  outline-offset: 2px;
}

img, svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Prevent unwanted horizontal overflow */
.no-overflow {
  overflow-wrap: anywhere;
  word-break: break-word;
}