/* ============================================
   GlobalSizeChart.com - Modern CSS Framework
   ============================================ */

:root {
  --primary-color: #4a90e2;
  --primary-dark: #357abd;
  --secondary-color: #7b68ee;
  --text-primary: #2c3e50;
  --text-secondary: #5a6c7d;
  --text-light: #8a9ba8;
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #f0f2f5;
  --border-color: #e1e8ed;
  --success-color: #27ae60;
  --warning-color: #f39c12;
  --error-color: #e74c3c;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography (Task B: consistent vertical rhythm site-wide)
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--text-primary);
}

h1, h2, h3, h4 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.3;
}

h5, h6 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

main > h1:first-child,
main > h2:first-child {
  margin-top: 1.5rem;
}

p {
  margin-bottom: 1.2rem;
}

ul, ol {
  margin-bottom: 1.5rem;
}

section {
  margin-bottom: 3rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* ============================================
   Layout
   ============================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ============================================
   Header & Navigation: clean two-tier layout
   ============================================ */

body {
  margin: 0;
}

main {
  padding-top: 2rem;
}

header {
  position: sticky;
  top: 0;
  z-index: 1000;
}

.site-header {
  background: #ffffff;
  border-bottom: 1px solid #eaeaea;
  padding: 1rem 0 0.5rem 0;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.header-row-primary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.site-logo {
  font-size: 1.4rem;
  font-weight: 700;
  white-space: nowrap;
  text-decoration: none;
  color: var(--primary-color);
}

.primary-nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: nowrap;
}

.primary-nav a {
  font-weight: 600;
  white-space: nowrap;
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--spacing-xs) 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.primary-nav a:hover {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.secondary-nav {
  margin-top: 0.75rem;
  display: flex;
  gap: 1.25rem;
  font-size: 0.9rem;
  opacity: 0.75;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.secondary-nav::-webkit-scrollbar {
  display: none;
}

.secondary-nav a {
  white-space: nowrap;
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--spacing-xs) 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.secondary-nav a:hover {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

/* Legacy: old header class names (map to new layout) */
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

@media (max-width: 992px) {
  .header-row-primary,
  .header-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .primary-nav {
    flex-wrap: wrap;
  }
}

/* ============================================
   Main Content
   ============================================ */

main {
  min-height: calc(100vh - 200px);
  padding-top: 2rem;
  padding-bottom: var(--spacing-xl);
}

.hero {
  text-align: center;
  padding: var(--spacing-xl) 0;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  margin-bottom: var(--spacing-xl);
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.hero-trust {
  margin-top: 1rem;
  font-size: 0.9rem;
  opacity: 0.7;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* ============================================
   Converter Tool
   ============================================ */

.converter-card {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.converter-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

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

.form-group label {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
  font-size: 0.9rem;
}

.form-group select,
.form-group input {
  padding: var(--spacing-sm);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: all 0.2s ease;
  background: var(--bg-primary);
  color: var(--text-primary);
}

.form-group select:focus,
.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* Phase 13.5: inline validation error (no auto-correct) */
.size-input-helper {
  margin-top: 0.35rem;
  font-size: 0.8125rem;
  color: var(--text-light, #8a9ba8);
}

.converter-error {
  margin-top: var(--spacing-xs);
  font-size: 0.9rem;
  color: var(--error-color);
}

.btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  grid-column: 1 / -1;
  justify-self: start;
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

/* ============================================
   Results Display
   ============================================ */

.results {
  margin-top: var(--spacing-lg);
  display: none;
}

.results.active {
  display: block;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.result-card {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
  transition: all 0.2s ease;
}

.result-card.best-match {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
  transform: scale(1.05);
}

.result-card.best-match .result-label,
.result-card.best-match .result-value {
  color: white;
}

.result-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.result-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.result-cm {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: var(--spacing-xs);
}

.result-card.best-match .result-cm {
  color: rgba(255, 255, 255, 0.9);
}

/* ============================================
   Content Sections
   ============================================ */

.content-section {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.content-section h2 {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

/* Measurement authority: step lists, conversion tables, diagrams */
.steps-list {
  padding-left: 1.5rem;
  margin: 1rem 0;
}
.steps-list li {
  margin-bottom: 0.5rem;
}
.conversion-examples {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}
.conversion-examples th,
.conversion-examples td {
  border: 1px solid var(--border-color, #ddd);
  padding: 0.5rem 0.75rem;
  text-align: left;
}
.conversion-examples th {
  background: var(--bg-secondary, #f5f5f5);
}
.measurement-diagram {
  margin: 1.5rem 0;
  text-align: center;
}
.measurement-diagram svg {
  max-width: 100%;
  height: auto;
}
.measurement-diagram figcaption {
  margin-top: 0.5rem;
  font-size: 0.95em;
  color: var(--text-secondary, #555);
}

/* UX Trust: publisher-trust section (homepage, converters, hubs) */
.publisher-trust {
  background: var(--bg-secondary);
  border-left: 4px solid var(--primary-color);
}
.publisher-trust__intro {
  margin-bottom: var(--spacing-md);
}
.publisher-trust__list {
  list-style: none;
  padding-left: 0;
  margin: 0;
}
.publisher-trust__list li {
  margin-bottom: var(--spacing-sm);
  padding-left: 0;
}
.publisher-trust__list li:last-child {
  margin-bottom: 0;
}

/* Phase 13.5: Fit Notice — width & fit authority (informative, not alarming) */
.fit-notice {
  background: #f7f9fc;
  border: 1px solid #e1e6ef;
  padding: 16px;
  margin-top: 24px;
  border-radius: 8px;
  font-size: 0.95rem;
}

.fit-notice h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.fit-notice p {
  margin: 0 0 0.5rem;
}

.fit-notice p:last-of-type {
  margin-bottom: 0.75rem;
}

.fit-notice a {
  color: var(--primary-color, #2563eb);
}

/* Phase 13.5: UX authority — subtle trust bar under converter results */
.converter-trust-bar {
  margin: 1rem 0 0;
  padding-top: 0.75rem;
  border-top: 1px solid #e8ecf1;
  font-size: 0.8125rem;
  color: #5c6370;
  line-height: 1.45;
}

.converter-trust-bar a {
  color: var(--primary-color, #2563eb);
  text-decoration: none;
}

.converter-trust-bar a:hover {
  text-decoration: underline;
}

/* Phase 11: Monetization modules (trust + dwell time, no ad code) */
.monetization-modules .monetization-module-wrap {
  margin-bottom: var(--spacing-md);
}
.monetization-modules .monetization-module-wrap:last-child {
  margin-bottom: 0;
}
.monetization-module {
  background: var(--bg-tertiary);
  border-left: 4px solid var(--primary-color);
  border-radius: var(--radius-sm);
  padding: var(--spacing-md);
}
.monetization-module__title {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
}
.monetization-module__inner p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Phase 12: Affiliate product recommendation modules (educational, no buy/affiliate disclosure) */
.affiliate-module {
  background: var(--bg-tertiary);
  border-left: 4px solid var(--primary-color);
  border-radius: var(--radius-sm);
  padding: var(--spacing-md);
}
.affiliate-module__inner {
  max-width: 100%;
}
.affiliate-module__title {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
}
.affiliate-module__subtext {
  font-size: 0.95rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary, #555);
}
.affiliate-module__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
  list-style: none;
  margin: 0;
  padding: 0;
}
@media (min-width: 520px) {
  .affiliate-module__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.affiliate-module__item {
  font-size: 0.9rem;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--border-color);
}
.affiliate-module__item:last-child {
  border-bottom: none;
}
.affiliate-module__item:empty {
  display: none;
}

/* Commercial content blocks (brand/clothing/measurement/high_purchase) */
.commercial-modules .commercial-module-wrap {
  margin-bottom: var(--spacing-md);
}
.commercial-modules .commercial-module-wrap:last-child {
  margin-bottom: 0;
}
.commercial-module {
  background: var(--bg-tertiary);
  border-left: 4px solid var(--primary-color);
  border-radius: var(--radius-sm);
  padding: var(--spacing-md);
}
.commercial-module__title {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
}
.commercial-modules .commercial-module__inner p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

/* Phase 11 Objective 3: Session depth modules (+5 clicks) */
.session-depth-modules {
  margin-top: var(--spacing-lg);
}
.session-depth-modules__heading {
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}
.session-depth-modules__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
}
@media (max-width: 600px) {
  .session-depth-modules__grid {
    grid-template-columns: 1fr;
  }
}
.session-depth-block {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm);
}
.session-depth-block__title {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--border-color);
}
.session-depth-links {
  list-style: none;
  margin: 0;
  padding: 0;
}
.session-depth-links li {
  margin-bottom: 0.35rem;
}
.session-depth-links a {
  color: var(--primary-color);
  text-decoration: none;
}
.session-depth-links a:hover {
  text-decoration: underline;
}

/* Phase 11 Objective 4: Conversion loop modules */
.conversion-loop {
  margin-top: var(--spacing-lg);
}
.conversion-loop__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}
.conversion-loop__block {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: var(--spacing-md);
  min-width: 200px;
  flex: 1 1 280px;
}
.conversion-loop__title {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--border-color);
}
.conversion-loop__links {
  list-style: none;
  margin: 0;
  padding: 0;
}
.conversion-loop__links li {
  margin-bottom: 0.35rem;
}
.conversion-loop__links a {
  color: var(--primary-color);
  text-decoration: none;
}
.conversion-loop__links a:hover {
  text-decoration: underline;
}

/* Phase 11 Objective 6: Behavioral recommendation engine (next-step) */
.next-step {
  margin-top: var(--spacing-lg);
}
.next-step__heading {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}
.next-step__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}
.next-step__block {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: var(--spacing-md);
  min-width: 180px;
  flex: 1 1 240px;
}
.next-step__title {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--border-color);
}
.next-step__links {
  list-style: none;
  margin: 0;
  padding: 0;
}
.next-step__links li {
  margin-bottom: 0.35rem;
}
.next-step__links a {
  color: var(--primary-color);
  text-decoration: none;
}
.next-step__links a:hover {
  text-decoration: underline;
}

/* Phase 11 Objective 7: High RPM content modules (time on page, scroll depth, ad viewability) */
.high-rpm-modules {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}
.high-rpm-modules__heading {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}
.high-rpm-modules__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--spacing-md);
}
.high-rpm-module {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: var(--spacing-md);
}
.high-rpm-module__title {
  font-size: 1.05rem;
  margin-bottom: var(--spacing-xs);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--border-color);
}
.high-rpm-module__snippet {
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary, inherit);
}
.high-rpm-module__read-more {
  margin: 0;
  font-size: 0.9rem;
}
.high-rpm-module__read-more a {
  color: var(--primary-color);
  text-decoration: none;
}
.high-rpm-module__read-more a:hover {
  text-decoration: underline;
}
@media (max-width: 600px) {
  .high-rpm-modules__grid {
    grid-template-columns: 1fr;
  }
}

/* Phase 11 Objective 8: UX revenue optimization — natural scroll pauses for future ad placement */
.content-break {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  min-height: 1px;
  break-inside: avoid;
}
.engagement-box {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  min-height: 80px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary, transparent);
  border: 1px solid var(--border-color, transparent);
}
.user-decision-point {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-sm) 0;
  min-height: 60px;
}
.commercial-context {
  margin: var(--spacing-md) 0;
  min-height: 90px;
  display: block;
}
/* Revenue UX layout engine: structural sections for future ad placement, affiliate overlays, RPM optimization */
.product-context {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-sm) 0;
  min-height: 1px;
  display: block;
}
.fit-warning {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-sm) 0;
  min-height: 1px;
  display: block;
}
.comparison-zone {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-sm) 0;
  min-height: 1px;
  display: block;
}
.recommendation-zone {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-sm) 0;
  min-height: 1px;
  display: block;
}

.breadcrumb {
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  color: var(--text-muted, #666);
}

.breadcrumb a {
  color: var(--primary-color);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-sep {
  margin: 0 0.35em;
}

.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 500;
}

.breadcrumbs {
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  color: var(--text-muted, #666);
}

.breadcrumbs a {
  color: var(--primary-color);
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.breadcrumbs span {
  color: var(--text-primary);
  font-weight: 500;
}

/* Discovery grid: visible related links for crawl density (SEO-safe, no hiding). */
.discovery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.5rem 1rem;
  font-size: 0.8rem;
  line-height: 1.4;
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}

.discovery-grid a {
  color: var(--primary-color);
  text-decoration: none;
}

.discovery-grid a:hover {
  text-decoration: underline;
}

.internal-links {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.internal-links h2 {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

.internal-links ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-sm);
}

.internal-links a {
  color: var(--primary-color);
  text-decoration: none;
}

.internal-links a:hover {
  text-decoration: underline;
}

/* Related Size Grid (Type A pages): 2 cols mobile, 4 desktop, card style */
.related-size-grid {
  margin-bottom: var(--spacing-lg);
}

.related-size-grid h2 {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

.related-size-grid .grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

@media (min-width: 768px) {
  .related-size-grid .grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.related-size-grid .grid a {
  display: block;
  padding: var(--spacing-md);
  background: var(--bg-secondary, #f5f5f5);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  color: var(--primary-color);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.2s ease;
}

.related-size-grid .grid a:hover {
  background: var(--bg-tertiary, #eee);
  text-decoration: none;
}

.crawl-discovery {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.crawl-discovery h2 {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

.crawl-discovery-links {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing-sm);
}

.crawl-discovery-links a {
  color: var(--primary-color);
  text-decoration: none;
}

.crawl-discovery-links a:hover {
  text-decoration: underline;
}

.collapsible {
  margin-bottom: var(--spacing-md);
}

.collapsible-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid var(--border-color);
}

.collapsible-header:hover {
  background: var(--bg-tertiary);
}

.collapsible-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.collapsible-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 var(--spacing-md);
}

.collapsible-content.active {
  max-height: 2000px;
  padding: var(--spacing-md);
}

.collapsible-icon {
  transition: transform 0.3s ease;
}

.collapsible-header.active .collapsible-icon {
  transform: rotate(180deg);
}

/* ============================================
   Ad Placeholders
   ============================================ */

.ad-placeholder {
  background: var(--bg-tertiary);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-sm);
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--text-light);
  margin: var(--spacing-lg) 0;
  min-height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-placeholder.sidebar {
  min-height: 600px;
}

/* ============================================
   Footer
   ============================================ */

footer {
  background: var(--text-primary);
  color: white;
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
  color: white;
  margin-bottom: var(--spacing-md);
  font-size: 1.1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.2s ease;
}

.footer-section a:hover {
  color: white;
}

.footer-accuracy {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.95rem;
}

/* Avoid content-section light box so text stays legible on footer dark background */
footer .footer-accuracy.content-section {
  background: transparent;
  box-shadow: none;
}

.footer-accuracy h3 {
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
  color: #fff;
}

.footer-accuracy ul {
  list-style: disc;
  margin: 0 0 var(--spacing-sm) 1.25rem;
  padding: 0;
}

.footer-accuracy ul li {
  color: rgba(255, 255, 255, 0.92);
}

.footer-accuracy p {
  margin: 0;
  opacity: 0.95;
  color: rgba(255, 255, 255, 0.9);
}

.ownership-block {
  text-align: center;
  font-size: 0.9rem;
  opacity: 0.75;
  margin-top: 1.5rem;
}

.ownership-block p {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
}

.micro-disclaimer {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.55);
  max-width: 560px;
  margin: 0 auto var(--spacing-md);
  line-height: 1.4;
}

/* ============================================
   FAQ Styling
   ============================================ */

.faq-item {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

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

.faq-item h3 {
  color: var(--primary-color);
  font-size: 1.2rem;
  margin-bottom: var(--spacing-sm);
}

.faq-item p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-section {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.faq-section h2 {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

.faq-section h3 {
  color: var(--primary-color);
  font-size: 1.2rem;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
}

.faq-section h3:first-of-type {
  margin-top: 0;
}

.faq-section p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Ad Placement Styling
   ============================================ */

.ad-container {
  margin: 30px auto;
  text-align: center;
  max-width: 100%;
  min-height: 90px;
}

.ad-top { margin-top: 25px; }
.ad-after-tool { margin-top: 35px; }
.ad-mid-content { margin: 40px 0; }
.ad-before-faq { margin: 35px 0; }
.ad-bottom { margin: 45px 0; }

.ad-sticky-mobile {
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  z-index: 999;
  background-color: var(--bg-primary); /* Ensure visibility */
  padding: var(--spacing-xs); /* Small padding for better look */
  box-shadow: var(--shadow-md); /* Subtle shadow */
  display: none; /* Hidden by default */
}

@media (max-width: 768px) {
  .ad-sticky-mobile {
    display: block; /* Show on mobile */
  }
}

/* Ad slot placeholders (structural only — no AdSense scripts) */
.ad-slot {
  margin: 28px auto;
  text-align: center;
  max-width: 100%;
  min-height: 90px;
}
.ad-slot.ad-top { margin-top: 25px; }
.ad-slot.ad-inline { margin: 32px 0; }
.ad-slot.ad-mid { margin: 40px 0; }
.ad-slot.ad-bottom { margin: 45px 0; }
.ad-slot.ad-sticky-mobile { margin-top: 24px; }
@media (max-width: 768px) {
  .ad-slot.ad-sticky-mobile { min-height: 50px; }
}

/* ============================================
   Utility Classes
   ============================================ */

.text-center {
  text-align: center;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden {
  display: none;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  h1 {
    font-size: 2rem;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .converter-form {
    grid-template-columns: 1fr;
  }

  .site-nav {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  nav ul {
    gap: var(--spacing-md);
    justify-content: center;
  }

  .converter-card {
    padding: var(--spacing-md);
  }

  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .results-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
  header, footer, .ad-placeholder {
    display: none;
  }

  .converter-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}