/* /style.css */
:root {
  --bg-color: #f8fafc;
  --surface-color: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  /* Changed from Binance Yellow to a Trustworthy Indigo/Blue to establish independent brand identity */
  --accent-color: #4f46e5; 
  --accent-hover: #4338ca;
  --accent-light: #e0e7ff;
  --danger-color: #ef4444;
  --danger-bg: #fef2f2;
  --success-color: #10b981;
  --success-bg: #ecfdf5;
  --warning-color: #f59e0b;
  --warning-bg: #fffbeb;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

html[dir="rtl"] body {
  direction: rtl;
}

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

ul {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Top Disclaimer Banner */
.top-disclaimer {
  background-color: var(--surface-color);
  color: var(--text-tertiary);
  font-size: 0.75rem;
  text-align: center;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border-color);
}

.top-disclaimer a {
  color: var(--text-secondary);
  text-decoration: underline;
}

/* Header & Nav */
header {
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0;
  color: var(--text-primary);
  z-index: 101;
}

.logo img {
  width: auto;
  height: 30px;
  display: block;
  flex-shrink: 0;
}

.logo-wordmark {
  display: inline-block;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

.main-nav {
  display: flex;
  align-items: center;
}

.main-nav ul {
  display: flex;
  gap: 24px;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.main-nav a:hover {
  color: var(--accent-color);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  z-index: 101;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
  fill: var(--text-primary);
}

/* Language Dropdown */
.lang-dropdown {
  position: relative;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  transition: background-color 0.2s;
}

.lang-btn:hover {
  background-color: var(--bg-color);
}

.lang-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.lang-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  min-width: 120px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
}

.lang-dropdown.active .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-menu a {
  display: block;
  padding: 10px 16px;
  font-size: 0.9rem;
  color: var(--text-primary);
  transition: background-color 0.2s;
}

.lang-menu a.current {
  background-color: var(--accent-light);
  color: var(--accent-hover);
  font-weight: 600;
}

.lang-menu a:hover {
  background-color: var(--bg-color);
  color: var(--accent-color);
}

.lang-menu a.current:hover {
  background-color: var(--accent-light);
  color: var(--accent-hover);
}

html[dir="rtl"] .lang-menu {
  left: 0;
  right: auto;
  text-align: right;
}

.lang-status {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--surface-color);
}

.lang-status-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.lang-status-note {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* Hero Section */
.hero {
  padding: 80px 0;
  overflow: hidden;
  background: linear-gradient(180deg, var(--surface-color) 0%, var(--bg-color) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-content h1 {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-content p.subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 90%;
}

.risk-warning {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background-color: var(--danger-bg);
  padding: 16px;
  border-radius: var(--radius-md);
  margin-bottom: 32px;
  border-left: 4px solid var(--danger-color);
}

.risk-warning svg {
  width: 20px;
  height: 20px;
  fill: var(--danger-color);
  flex-shrink: 0;
  margin-top: 2px;
}

.risk-warning p {
  font-size: 0.875rem;
  color: var(--danger-color);
  margin: 0;
}

.cta-group {
  display: flex;
  gap: 16px;
  align-items: baseline;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--accent-color);
  color: #ffffff;
  font-weight: 600;
  padding: 16px 32px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-primary svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.btn-affiliate {
  padding: 14px 24px;
  box-shadow: none;
}

.btn-affiliate:hover {
  transform: none;
  box-shadow: var(--shadow-sm);
}

.affiliate-cta {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.affiliate-note {
  margin: 0;
  max-width: 40rem;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  line-height: 1.55;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--surface-color);
  color: var(--text-primary);
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  transition: all 0.2s;
  border: 1px solid var(--border-color);
  white-space: nowrap;
}

.btn-secondary:hover {
  background-color: var(--bg-color);
  border-color: var(--text-tertiary);
}

/* Hero Card */
.hero-card {
  background: var(--surface-color);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  position: relative;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100px;
  height: 100px;
  background: var(--accent-color);
  border-radius: 50%;
  z-index: -1;
  filter: blur(40px);
  opacity: 0.2;
}

.card-badge {
  display: inline-block;
  background-color: var(--accent-light);
  color: var(--accent-hover);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-card h3 {
  font-size: 1.75rem;
  margin-bottom: 24px;
}

.benefit-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.benefit-icon {
  width: 40px;
  height: 40px;
  background-color: var(--accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.benefit-icon svg {
  width: 20px;
  height: 20px;
  fill: var(--accent-color);
}

.benefit-text h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.benefit-text p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Section Common */
.section {
  padding: 80px 0;
}

.bg-white {
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 2.25rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-header h1 {
  font-size: 2.5rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

.selector-hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 40px;
}

.selector-hero-copy .subtitle {
  max-width: 100%;
}

.selector-keypoints {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.selector-keypoint {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}

.selector-keypoint strong {
  display: block;
  font-size: 1rem;
  margin-bottom: 8px;
}

.selector-keypoint p {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.95rem;
}

.selector-cta-group {
  flex-wrap: wrap;
}

.selector-hero-card h2 {
  font-size: 1.8rem;
  margin-bottom: 24px;
}

.selector-hero-card .benefit-icon {
  color: var(--accent-color);
  font-size: 1rem;
  font-weight: 700;
}

.selector-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin: 0 0 40px;
}

.selector-summary-card h2 {
  font-size: 1.35rem;
}

.selector-language-header {
  text-align: left;
  margin-bottom: 24px;
}

.selector-language-header p {
  margin: 0;
  max-width: 760px;
}

/* Article Content (For Long-tail SEO) */
.article-content {
  max-width: 800px;
  margin: 0 auto;
}

/* Breadcrumbs */
.breadcrumbs {
  padding: 24px 0 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.breadcrumbs a {
  color: var(--accent-color);
  transition: color 0.2s;
}

.breadcrumbs a:hover {
  color: var(--accent-hover);
}

.breadcrumbs .separator {
  margin: 0 8px;
  color: var(--text-tertiary);
}

html[dir="rtl"] .top-disclaimer,
html[dir="rtl"] .article-content,
html[dir="rtl"] .download-card,
html[dir="rtl"] .lang-menu a,
html[dir="rtl"] .faq-question {
  text-align: right;
}

html[dir="rtl"] .article-content ul,
html[dir="rtl"] .article-content ol,
html[dir="rtl"] .related-guides ul {
  padding-left: 0;
  padding-right: 24px;
}

html[dir="rtl"] .info-box,
html[dir="rtl"] .warning-box {
  border-left: none;
  border-right: 4px solid var(--accent-color);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

html[dir="rtl"] .warning-box {
  border-right-color: var(--warning-color);
}

html[dir="rtl"] .faq-question {
  flex-direction: row-reverse;
}

html[dir="rtl"] .reference-list {
  text-align: right;
}

.read-more {
  display: inline-block;
  margin-top: 16px;
  color: var(--accent-color);
  font-weight: 600;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.read-more:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

.article-content h3 {
  font-size: 1.5rem;
  margin: 40px 0 16px;
  color: var(--text-primary);
  border-bottom: 2px solid var(--accent-light);
  padding-bottom: 8px;
  display: inline-block;
}

.article-content h3:first-child {
  margin-top: 0;
}

.article-content h4 {
  font-size: 1.2rem;
  margin: 24px 0 12px;
  color: var(--text-primary);
}

.article-content p {
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
  color: var(--text-secondary);
  font-size: 1.05rem;
}

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

.article-content strong {
  color: var(--text-primary);
}

/* Info Boxes */
.info-box {
  background-color: var(--accent-light);
  border-left: 4px solid var(--accent-color);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
}

.info-box p {
  margin: 0;
  color: var(--accent-hover);
  font-size: 0.95rem;
}

.warning-box {
  background-color: var(--warning-bg);
  border-left: 4px solid var(--warning-color);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 24px 0;
}

.warning-box p {
  margin: 0;
  color: #b45309;
  font-size: 0.95rem;
}

.trust-section {
  padding-top: 32px;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.selector-trust-grid {
  margin: 48px 0 32px;
}

.selector-notes {
  margin-bottom: 24px;
}

.selector-notes h2 {
  font-size: 1.75rem;
  margin-bottom: 16px;
}

.trust-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: 28px;
}

.trust-card h2 {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.trust-card p {
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.reference-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.reference-list li {
  padding: 14px 0;
  border-top: 1px solid var(--border-color);
}

.reference-list a {
  display: block;
  color: var(--accent-color);
  font-weight: 600;
  word-break: break-word;
}

.reference-list a:hover {
  color: var(--accent-hover);
}

.reference-meta {
  display: block;
  margin-top: 6px;
  color: var(--text-tertiary);
  font-size: 0.9rem;
  word-break: break-word;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: 32px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.seo-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.seo-table th, .seo-table td {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
}

.seo-table th {
  background-color: var(--bg-color);
  font-weight: 600;
  color: var(--text-primary);
}

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

.seo-table tr:hover td {
  background-color: var(--bg-color);
}

.highlight-text {
  color: var(--accent-color);
  font-weight: 600;
}

/* Tutorial Grid */
.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-card {
  background-color: var(--surface-color);
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.step-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-light);
}

.step-number {
  width: 48px;
  height: 48px;
  background-color: var(--accent-color);
  color: #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 auto 24px;
}

.step-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.step-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Download Grid */
.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 32px;
}

.download-card {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  background-color: var(--surface-color);
}

.download-icon {
  width: 56px;
  height: 56px;
  background-color: var(--bg-color);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.download-icon svg {
  width: 32px;
  height: 32px;
  fill: var(--text-primary);
}

.download-info h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.download-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Security Grid */
.security-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.security-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 32px;
  background-color: var(--bg-color);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.security-item svg {
  width: 48px;
  height: 48px;
  fill: var(--accent-color);
  margin-bottom: 24px;
}

.security-item h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.security-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* FAQ Section */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
}

.faq-question:hover {
  color: var(--accent-color);
}

.faq-question svg {
  width: 20px;
  height: 20px;
  fill: var(--text-secondary);
  transition: transform 0.3s;
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
  fill: var(--accent-color);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Footer */
footer {
  background-color: var(--surface-color);
  padding: 64px 0 32px;
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 64px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 16px;
  font-size: 0.9rem;
  max-width: 400px;
}

.footer-links h4 {
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent-color);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.disclaimer-box {
  background-color: var(--bg-color);
  padding: 16px;
  border-radius: var(--radius-md);
  margin-top: 24px;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  border: 1px solid var(--border-color);
}

.locale-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-bottom: 24px;
}

.locale-card {
  display: block;
  padding: 32px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  position: relative;
}

.locale-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-light);
}

.locale-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  padding: 6px 12px;
  border-radius: 999px;
  background-color: var(--accent-light);
  color: var(--accent-hover);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.locale-card h2 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.locale-card p {
  color: var(--text-secondary);
  margin-bottom: 0;
}

.locale-card.recommended {
  border-color: rgba(245, 158, 11, 0.45);
  box-shadow: 0 16px 34px rgba(245, 158, 11, 0.14);
}

.locale-card-note {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding: 6px 12px;
  border-radius: 999px;
  background-color: var(--accent-light);
  color: var(--accent-hover);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.locale-recommendation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 auto 32px;
  padding: 24px 28px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at top right, rgba(245, 158, 11, 0.16), transparent 38%),
    linear-gradient(135deg, #fffaf0 0%, #ffffff 100%);
  border: 1px solid rgba(245, 158, 11, 0.24);
  box-shadow: var(--shadow-md);
}

.locale-recommendation h2 {
  font-size: 1.45rem;
  margin-bottom: 8px;
}

.locale-recommendation p {
  color: var(--text-secondary);
  margin-bottom: 0;
}

.locale-recommendation-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.locale-note {
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .selector-hero-grid {
    grid-template-columns: 1fr;
  }
  .selector-keypoints {
    grid-template-columns: 1fr;
  }
  .tutorial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .security-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .download-grid {
    grid-template-columns: 1fr;
  }
  .locale-grid {
    grid-template-columns: 1fr;
  }
  .selector-summary-grid {
    grid-template-columns: 1fr;
  }
  .trust-grid {
    grid-template-columns: 1fr;
  }
  .locale-recommendation {
    flex-direction: column;
    align-items: flex-start;
  }
  .locale-recommendation-actions {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 768px) {
  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 20px;
    box-shadow: var(--shadow-md);
    display: none;
    flex-direction: column;
  }
  
  .main-nav.active {
    display: flex;
  }
  
  .main-nav ul {
    flex-direction: column;
    width: 100%;
    gap: 16px;
  }
  
  .main-nav a {
    display: block;
    padding: 8px 0;
    font-size: 1.1rem;
  }
  
  .mobile-menu-btn {
    display: block;
  }

  .lang-status-note {
    display: none;
  }

  .header-actions {
    gap: 10px;
  }

  .lang-btn {
    padding: 8px 10px;
  }
}

@media (max-width: 576px) {
  .hero-content h1 {
    font-size: 2.25rem;
  }
  .cta-group {
    flex-direction: column;
    align-items: stretch;
  }
  .tutorial-grid {
    grid-template-columns: 1fr;
  }

  .locale-card {
    padding: 24px;
  }

  .article-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* Utility & Article Specific Styles (Replacing Inline Styles) */
.header-back-link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.header-back-link:hover {
  color: var(--text-primary);
}

.article-title {
  font-size: 2.5rem;
  margin: 24px 0;
  color: var(--text-primary);
  line-height: 1.3;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
  color: var(--text-tertiary);
  font-size: 0.9rem;
}

.article-date {
  color: var(--text-tertiary);
  margin-bottom: 48px;
}

.article-section {
  margin-top: 48px;
}

.article-cta-box {
  margin-top: 48px;
  padding: 32px;
  background-color: var(--bg-color);
  border-radius: var(--radius-lg);
  text-align: center;
}

.article-cta-box h3 {
  margin-top: 0;
}

.article-cta-box p {
  margin-bottom: 24px;
}

.article-cta-box .affiliate-cta {
  align-items: center;
}

.article-cta-box .affiliate-note {
  text-align: center;
}

.benefit-note {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.simple-footer {
  margin-top: 64px;
  background-color: var(--surface-color);
  padding: 32px 0;
  border-top: 1px solid var(--border-color);
}

.simple-footer-content {
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.simple-footer-lead {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 760px;
  margin: 0 auto 16px;
}

.simple-footer-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin: 0 0 14px;
}

.simple-footer-links a,
.simple-footer-note a {
  color: var(--accent-color);
  font-weight: 600;
}

.simple-footer-links a:hover,
.simple-footer-note a:hover {
  color: var(--accent-hover);
}

.simple-footer-note {
  margin: 0;
}

.related-guides {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

.related-guides h3 {
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.related-guides ul {
  list-style: disc;
  padding-left: 20px;
}

.related-guides li {
  margin-bottom: 8px;
}

.related-guides a {
  color: var(--accent-color);
  text-decoration: none;
}

.related-guides a:hover {
  text-decoration: underline;
}