/* ==========================================================================
   Senior Dating Lab - Main Stylesheet
   Design System: Exaggerated Minimalism
   Target: Adults 50+, mobile-first, high accessibility
   ========================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Figtree:wght@300;400;500;600;700&family=Noto+Sans:wght@300;400;500;700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --color-primary: #1E3A8A;
  --color-primary-light: #1E40AF;
  --color-primary-dark: #152C6B;
  --color-on-primary: #FFFFFF;
  --color-secondary: #3B82F6;
  --color-secondary-light: #60A5FA;
  --color-accent: #7C3AED;
  --color-accent-light: #8B5CF6;
  --color-background: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-foreground: #1E293B;
  --color-text: #1E293B;
  --color-text-secondary: #475569;
  --color-text-muted: #64748B;
  --color-muted: #E9EEF5;
  --color-muted-dark: #CBD5E1;
  --color-border: #BFDBFE;
  --color-border-light: #E2E8F0;
  --color-destructive: #DC2626;
  --color-success: #16A34A;
  --color-warning: #D97706;
  --color-ring: #1E3A8A;

  /* Typography - Senior-friendly: larger base sizes */
  --font-heading: 'Figtree', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Noto Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 0.875rem;    /* 14px */
  --font-size-sm: 1rem;        /* 16px */
  --font-size-base: 1.125rem;  /* 18px - larger for seniors */
  --font-size-lg: 1.25rem;     /* 20px */
  --font-size-xl: 1.5rem;      /* 24px */
  --font-size-2xl: 1.875rem;   /* 30px */
  --font-size-3xl: 2.25rem;    /* 36px */
  --font-size-4xl: 3rem;       /* 48px */

  /* Spacing - Spacious (density 3/10) */
  --space-xs: 0.5rem;   /* 8px */
  --space-sm: 0.75rem;  /* 12px */
  --space-md: 1rem;     /* 16px */
  --space-lg: 1.5rem;   /* 24px */
  --space-xl: 2rem;     /* 32px */
  --space-2xl: 3rem;    /* 48px */
  --space-3xl: 4rem;    /* 64px */
  --space-4xl: 6rem;    /* 96px */

  /* Layout */
  --max-width: 1200px;
  --content-max-width: 800px;
  --header-height: 64px;
  --border-radius-sm: 0.375rem;
  --border-radius: 0.5rem;
  --border-radius-lg: 0.75rem;
  --border-radius-xl: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition: 200ms ease;
  --transition-slow: 300ms ease;
}

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

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

h1 { font-size: var(--font-size-4xl); letter-spacing: -0.02em; }
h2 { font-size: var(--font-size-3xl); letter-spacing: -0.01em; }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--space-lg);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  transition: color var(--transition-fast);
}

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

a:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 2px;
  border-radius: 2px;
}

ul, ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

li {
  margin-bottom: var(--space-sm);
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  margin: var(--space-xl) 0;
  background-color: var(--color-muted);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

strong {
  font-weight: 600;
  color: var(--color-foreground);
}

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

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  padding-bottom: var(--space-3xl);
}

/* --- Header --- */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  height: auto;
  min-height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
  flex-wrap: wrap;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--font-size-xl);
}

.site-logo:hover {
  color: var(--color-primary-dark);
}

.site-logo svg {
  width: 36px;
  height: 36px;
}

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

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.nav-list a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  font-size: var(--font-size-sm);
  border-radius: var(--border-radius);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.nav-list a:hover,
.nav-list a.active {
  background-color: var(--color-muted);
  color: var(--color-primary);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  color: var(--color-primary);
}

.menu-toggle svg {
  width: 28px;
  height: 28px;
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  padding: var(--space-md) 0;
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.breadcrumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  margin: 0;
}

.breadcrumbs li:not(:last-child)::after {
  content: '›';
  margin: 0 var(--space-sm);
  color: var(--color-muted-dark);
}

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

.breadcrumbs a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumbs li:last-child {
  color: var(--color-text);
  font-weight: 500;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 48px;
  min-width: 48px;
  line-height: 1.2;
}

.btn:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-on-primary);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-muted);
  color: var(--color-primary-dark);
}

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

.btn-accent:hover {
  background-color: #6D28D9;
  color: #FFFFFF;
}

.btn-large {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--font-size-lg);
  min-height: 56px;
}

.btn-small {
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-sm);
  min-height: 40px;
}

/* --- Cards --- */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-xl) 0;
}

/* --- Feature Cards --- */
.feature-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-xl);
}

.feature-card .icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  background-color: var(--color-muted);
  border-radius: var(--border-radius-lg);
  color: var(--color-primary);
}

.feature-card h3 {
  margin-bottom: var(--space-sm);
}

/* --- Hero Section --- */
.hero {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--space-4xl) 0;
  text-align: center;
}

.hero h1 {
  color: var(--color-on-primary);
  font-size: clamp(2rem, 5vw, var(--font-size-4xl));
  margin-bottom: var(--space-lg);
}

.hero p {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.9);
  max-width: 700px;
  margin: 0 auto var(--space-2xl);
}

.hero .btn {
  background-color: var(--color-on-primary);
  color: var(--color-primary);
  border-color: var(--color-on-primary);
}

.hero .btn:hover {
  background-color: var(--color-muted);
  color: var(--color-primary-dark);
}

/* --- Section --- */
.section {
  padding: var(--space-3xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-title h2 {
  margin-bottom: var(--space-sm);
}

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

/* --- Article Content --- */
.article-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
  flex-wrap: wrap;
}

.article-body {
  font-size: var(--font-size-base);
  line-height: 1.8;
}

.article-body h2 {
  margin-top: var(--space-2xl);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-muted);
}

.article-body h3 {
  margin-top: var(--space-xl);
}

.article-body img {
  border-radius: var(--border-radius);
  margin: var(--space-xl) 0;
}

/* --- Callout Boxes --- */
.callout {
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--border-radius);
  margin: var(--space-xl) 0;
  border-left: 4px solid;
}

.callout-info {
  background-color: #EFF6FF;
  border-color: var(--color-secondary);
  color: var(--color-primary-dark);
}

.callout-warning {
  background-color: #FFFBEB;
  border-color: var(--color-warning);
  color: #92400E;
}

.callout-danger {
  background-color: #FEF2F2;
  border-color: var(--color-destructive);
  color: #991B1B;
}

.callout-success {
  background-color: #F0FDF4;
  border-color: var(--color-success);
  color: #166534;
}

.callout h4 {
  margin-bottom: var(--space-sm);
  color: inherit;
}

/* --- Table of Contents --- */
.toc {
  background-color: var(--color-muted);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.toc h3 {
  margin-bottom: var(--space-md);
  font-size: var(--font-size-lg);
}

.toc ol {
  list-style: decimal;
  margin: 0;
  padding-left: var(--space-xl);
}

.toc li {
  margin-bottom: var(--space-xs);
}

/* --- Review Card --- */
.review-card {
  border: 2px solid var(--color-border-light);
}

.review-card .rating {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin: var(--space-md) 0;
}

.review-card .rating .stars {
  color: #EAB308;
  font-size: var(--font-size-xl);
}

.review-card .rating .score {
  font-weight: 700;
  font-size: var(--font-size-xl);
  color: var(--color-primary);
}

/* --- Comparison Table --- */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-xl) 0;
  font-size: var(--font-size-sm);
  overflow-x: auto;
  display: block;
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.comparison-table th {
  background-color: var(--color-muted);
  font-weight: 600;
  color: var(--color-primary);
  font-family: var(--font-heading);
}

.comparison-table tr:hover td {
  background-color: var(--color-muted);
}

.comparison-table .check {
  color: var(--color-success);
  font-weight: 700;
}

.comparison-table .cross {
  color: var(--color-destructive);
}

/* --- Pros/Cons --- */
.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  margin: var(--space-xl) 0;
}

.pros,
.cons {
  padding: var(--space-xl);
  border-radius: var(--border-radius-lg);
}

.pros {
  background-color: #F0FDF4;
  border: 1px solid #BBF7D0;
}

.cons {
  background-color: #FEF2F2;
  border: 1px solid #FECACA;
}

.pros h4,
.cons h4 {
  margin-bottom: var(--space-md);
}

.pros ul,
.cons ul {
  margin: 0;
  padding-left: var(--space-lg);
}

/* --- Tool Page --- */
.tool-container {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl);
  margin: var(--space-xl) 0;
  box-shadow: var(--shadow);
}

.tool-result {
  margin-top: var(--space-xl);
  padding: var(--space-xl);
  background-color: var(--color-muted);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--color-primary);
  display: none;
}

.tool-result.visible {
  display: block;
}

/* --- Form Elements --- */
.form-group {
  margin-bottom: var(--space-xl);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-base);
  color: var(--color-foreground);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  background-color: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
  min-height: 48px;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.15);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-helper {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* --- Quiz --- */
.quiz-question {
  margin-bottom: var(--space-2xl);
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.quiz-option {
  display: flex;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  border: 2px solid var(--color-border-light);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 48px;
  font-size: var(--font-size-base);
}

.quiz-option:hover {
  border-color: var(--color-secondary);
  background-color: #EFF6FF;
}

.quiz-option.selected {
  border-color: var(--color-primary);
  background-color: var(--color-muted);
  font-weight: 600;
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-3xl) 0 var(--space-2xl);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-col h4 {
  color: var(--color-on-primary);
  margin-bottom: var(--space-md);
  font-size: var(--font-size-lg);
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col li {
  margin-bottom: var(--space-sm);
}

.footer-col a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-on-primary);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: var(--space-xl);
  text-align: center;
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: underline;
}

.footer-bottom a:hover {
  color: var(--color-on-primary);
}

.footer-disclosure {
  margin-top: var(--space-lg);
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.6;
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--space-md) var(--space-lg);
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  font-weight: 600;
  z-index: 200;
  text-decoration: none;
  font-size: var(--font-size-base);
}

.skip-link:focus {
  top: 0;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xl);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
  z-index: 50;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--color-primary-dark);
}

/* --- CTA Banner --- */
.cta-banner {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  padding: var(--space-2xl);
  border-radius: var(--border-radius-lg);
  text-align: center;
  margin: var(--space-2xl) 0;
}

.cta-banner h2 {
  color: var(--color-on-primary);
  margin-bottom: var(--space-md);
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-xl);
  font-size: var(--font-size-lg);
}

.cta-banner .btn {
  background-color: var(--color-on-primary);
  color: var(--color-primary);
}

/* --- Trust Badges --- */
.trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  padding: var(--space-lg) 0;
  flex-wrap: wrap;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.trust-bar .badge {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* --- Disclosure Banner --- */
.disclosure-banner {
  background-color: var(--color-muted);
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
  border-bottom: 1px solid var(--color-border-light);
}

.disclosure-banner a {
  font-weight: 500;
}

/* --- Article Index --- */
.article-list {
  display: grid;
  gap: var(--space-lg);
}

.article-list-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  transition: box-shadow var(--transition-fast);
}

.article-list-item:hover {
  box-shadow: var(--shadow-md);
}

.article-list-item h3 {
  margin-bottom: var(--space-xs);
}

.article-list-item h3 a {
  text-decoration: none;
  color: var(--color-primary);
}

.article-list-item h3 a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

.article-list-item .excerpt {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.article-list-item .meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* --- Step List --- */
.step-list {
  list-style: none;
  padding: 0;
  margin: var(--space-xl) 0;
  counter-reset: step;
}

.step-list li {
  counter-increment: step;
  position: relative;
  padding-left: var(--space-3xl);
  margin-bottom: var(--space-xl);
  min-height: 48px;
}

.step-list li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-lg);
  font-family: var(--font-heading);
}

/* --- FAQ --- */
.faq-item {
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--space-lg) 0;
}

.faq-question {
  font-weight: 600;
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-heading);
  padding: 0;
  min-height: 48px;
}

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

.faq-question::after {
  content: '+';
  font-size: var(--font-size-2xl);
  font-weight: 300;
  transition: transform var(--transition-fast);
}

.faq-question[aria-expanded="true"]::after {
  content: '−';
}

.faq-answer {
  padding-top: var(--space-md);
  display: none;
}

.faq-answer.open {
  display: block;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --font-size-base: 1.0625rem; /* 17px */
    --font-size-4xl: 2.25rem;
    --font-size-3xl: 1.875rem;
    --font-size-2xl: 1.5rem;
  }

  .header-inner {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-sm);
  }

  .menu-toggle {
    display: block;
    position: absolute;
    top: var(--space-md);
    right: var(--space-lg);
  }

  .main-nav {
    display: none;
    width: 100%;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
  }

  .nav-list a {
    padding: var(--space-md) var(--space-lg);
    border-radius: 0;
    border-bottom: 1px solid var(--color-border-light);
  }

  .pros-cons {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .container,
  .content-container {
    padding: 0 var(--space-md);
  }

  .hero {
    padding: var(--space-2xl) 0;
  }

  .hero h1 {
    font-size: var(--font-size-3xl);
  }

  .comparison-table {
    font-size: var(--font-size-xs);
  }

  .comparison-table th,
  .comparison-table td {
    padding: var(--space-sm);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

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

  .trust-bar {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

@media (min-width: 769px) {
  .main-nav {
    display: flex !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  background-color: var(--color-surface);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 600px;
  max-height: 85vh;
  overflow-y: auto;
  padding: var(--space-2xl);
  position: relative;
}

.modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  width: 44px;
  height: 44px;
  border: none;
  background: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius);
  transition: background-color var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--color-muted);
  color: var(--color-text);
}

.modal-close:focus-visible {
  outline: 3px solid var(--color-ring);
  outline-offset: 2px;
}

.modal-body {
  font-size: var(--font-size-base);
  line-height: 1.7;
}

.modal-body h3 {
  margin-top: 0;
  margin-bottom: var(--space-md);
}

.modal-body ul {
  padding-left: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.modal-body li {
  margin-bottom: var(--space-sm);
}

/* Print styles */
@media print {
  .site-header,
  .site-footer,
  .back-to-top,
  .menu-toggle,
  .cta-banner {
    display: none;
  }

  body {
    font-size: 12pt;
    color: #000;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}