/* ==========================================================================
   CSS Reset & Base Styles
   Note: Google Fonts (Inter, Space Grotesk) are loaded via <link> tags in HTML.
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

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

/* ==========================================================================
   Design Tokens (CSS Custom Properties)
   ========================================================================== */
:root {
  /* Color Palette — Dark Mode */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a2e;
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-glass: rgba(255, 255, 255, 0.08);

  /* Accent Colors */
  --accent-primary: #6c5ce7;
  --accent-secondary: #00cec9;
  --accent-gradient: linear-gradient(135deg, #6c5ce7, #00cec9);
  --accent-glow: rgba(108, 92, 231, 0.3);

  /* Text Colors */
  --text-primary: #e8e8ef;
  --text-secondary: #9393a8;
  --text-heading: #ffffff;

  /* Rating Colors */
  --star-filled: #fbbf24;
  --star-empty: #374151;

  /* Status Colors */
  --color-pro: #10b981;
  --color-con: #ef4444;

  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 8px 40px rgba(108, 92, 231, 0.2);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Max Content Width */
  --max-width: 1200px;
  --max-width-content: 800px;
}

/* ==========================================================================
   Typography
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', sans-serif;
  color: var(--text-heading);
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); font-weight: 700; }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); font-weight: 700; }
p { margin-bottom: var(--space-md); }

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

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

.section {
  padding: var(--space-4xl) 0;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 64px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 10, 15, 0.85);
  border-bottom: 1px solid var(--border-glass);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition-base);
}

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

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  position: relative;
  text-align: center;
  padding: var(--space-4xl) 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 70vh;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  z-index: -1;
  border-radius: 50%;
  pointer-events: none;
}

.hero-badge {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-secondary);
  padding: 4px 16px;
  border: 1px solid rgba(0, 206, 201, 0.3);
  border-radius: 50px;
  margin-bottom: var(--space-lg);
  background: rgba(0, 206, 201, 0.05);
}

.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto var(--space-xl);
}

/* ==========================================================================
   Trust Bar
   ========================================================================== */
.trust-bar {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
  background: var(--bg-secondary);
}

.trust-item {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}

.trust-item span {
  color: var(--color-pro);
}

/* ==========================================================================
   Glassmorphism Cards
   ========================================================================== */
.card {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-card);
  padding: var(--space-xl);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  transition: all var(--transition-base);
  text-decoration: none;
  border: none;
  border-radius: var(--radius-sm);
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  padding: 14px 28px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.btn-primary:hover {
  box-shadow: 0 0 30px var(--accent-glow);
  transform: scale(1.03);
  color: #fff;
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--accent-primary);
  color: var(--text-primary);
  padding: 13px 27px; /* Account for border */
}

.btn-secondary:hover {
  background: rgba(108, 92, 231, 0.1);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
  padding: 10px 20px;
  font-size: 0.875rem;
}

.btn-outline:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Star Ratings
   ========================================================================== */
.star-rating {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
}

.stars {
  position: relative;
  display: inline-block;
  color: var(--star-empty);
  letter-spacing: 2px;
}

.stars::before {
  content: '★★★★★';
}

.stars-filled {
  position: absolute;
  top: 0;
  left: 0;
  color: var(--star-filled);
  overflow: hidden;
  white-space: nowrap;
}

.stars-filled::before {
  content: '★★★★★';
}

.rating-text {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ==========================================================================
   Comparison Table
   ========================================================================== */
.comparison-table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin-bottom: var(--space-2xl);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-glass);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 900px;
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-md);
  border-bottom: 1px solid var(--border-glass);
  border-right: 1px solid var(--border-glass);
}

.comparison-table th:last-child,
.comparison-table td:last-child {
  border-right: none;
}

.comparison-table thead th {
  background: var(--bg-tertiary);
  font-family: 'Space Grotesk', sans-serif;
  text-align: center;
  font-size: 1.125rem;
}

.comparison-table tbody tr:nth-child(even) {
  background-color: var(--bg-secondary);
}

.comparison-table tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

.comparison-table th:first-child,
.comparison-table td:first-child {
  position: sticky;
  left: 0;
  background: var(--bg-secondary);
  z-index: 10;
  font-weight: 600;
  box-shadow: 2px 0 5px rgba(0,0,0,0.1);
}

.comparison-table thead th:first-child {
  background: var(--bg-tertiary);
}

.table-provider-logo {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.col-highlight {
  background-color: rgba(108, 92, 231, 0.05) !important;
  border-left: 1px solid rgba(108, 92, 231, 0.3) !important;
  border-right: 1px solid rgba(108, 92, 231, 0.3) !important;
}

.col-highlight th {
  background-color: rgba(108, 92, 231, 0.1) !important;
}

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

.pros-cons-box {
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.pros-title {
  color: var(--color-pro);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--space-md);
}

.cons-title {
  color: var(--color-con);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: var(--space-md);
}

.pros-cons-list {
  list-style: none;
}

.pros-cons-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.pros-cons-list.pros li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-pro);
  font-weight: bold;
}

.pros-cons-list.cons li::before {
  content: '✗';
  position: absolute;
  left: 0;
  color: var(--color-con);
  font-weight: bold;
}

/* ==========================================================================
   Pricing Table (Review Pages)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.pricing-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  position: relative;
  display: flex;
  flex-direction: column;
}

.pricing-card.recommended {
  border-color: var(--accent-primary);
  background: linear-gradient(180deg, rgba(108, 92, 231, 0.05) 0%, var(--bg-secondary) 100%);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 50px;
  white-space: nowrap;
}

.pricing-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1;
  margin-bottom: 4px;
}

.pricing-period {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 16px;
}

.pricing-renewal {
  font-size: 0.875rem;
  color: var(--color-con);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-glass);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.9rem;
  margin-bottom: 8px;
  padding-left: 24px;
  position: relative;
}

.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
}

/* ==========================================================================
   Review Summary Box
   ========================================================================== */
.review-summary {
  margin-bottom: var(--space-2xl);
  border-top: 3px solid var(--accent-primary);
}

.review-summary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.review-provider-logo {
  font-size: 2rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
}

.review-overall-rating {
  text-align: right;
}

.review-overall-score {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-heading);
  line-height: 1;
}

.sub-ratings {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md) var(--space-xl);
  margin-bottom: var(--space-lg);
  padding: var(--space-md) 0;
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
}

.sub-rating-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}

.sub-rating-bar {
  flex-grow: 1;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  margin: 0 12px;
  position: relative;
  overflow: hidden;
}

.sub-rating-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 3px;
}

.review-verdict {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  text-align: center;
}

/* ==========================================================================
   Affiliate Disclosure
   ========================================================================== */
.affiliate-disclosure {
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-xl);
  border: 1px solid var(--border-glass);
}

/* ==========================================================================
   Table of Contents
   ========================================================================== */
.toc-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.toc-title {
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
}

.toc-list {
  list-style: none;
}

.toc-list li {
  margin-bottom: 8px;
}

.toc-list a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: color var(--transition-base);
}

.toc-list a:hover,
.toc-list a.active {
  color: var(--accent-secondary);
}

/* ==========================================================================
   Article Formatting (Review Pages)
   ========================================================================== */
.article-content h2 {
  margin-top: var(--space-2xl);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-glass);
}

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

.article-content p {
  color: var(--text-secondary);
}

.article-content ul, 
.article-content ol {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  padding-left: 24px;
}

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

.cta-banner {
  text-align: center;
  padding: var(--space-xl);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-glass);
  margin: var(--space-2xl) 0;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-item {
  border-bottom: 1px solid var(--border-glass);
  margin-bottom: var(--space-sm);
}

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

.faq-item details {
  padding: var(--space-md) 0;
}

.faq-item summary {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--text-heading);
  list-style: none;
  position: relative;
  padding-right: 30px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--accent-primary);
  transition: transform var(--transition-base);
}

.faq-item details[open] summary::after {
  content: '−';
}

.faq-item details[open] .faq-answer {
  margin-top: var(--space-md);
  color: var(--text-secondary);
  animation: fadeDown 0.3s ease-out;
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #08080d;
  border-top: 1px solid var(--border-glass);
  padding: var(--space-4xl) 0 var(--space-xl);
  margin-top: var(--space-4xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-heading);
  margin-bottom: var(--space-sm);
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-title {
  color: var(--text-heading);
  font-family: 'Space Grotesk', sans-serif;
  margin-bottom: var(--space-md);
  font-size: 1.125rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

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

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

.footer-bottom {
  text-align: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-glass);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ==========================================================================
   Animations
   ========================================================================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 100ms; }
.fade-in-delay-2 { transition-delay: 200ms; }
.fade-in-delay-3 { transition-delay: 300ms; }

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1200px) {
  .hero-heading { font-size: 3rem; }
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-glass);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .comparison-table-wrapper {
    /* Hide table on mobile, show cards if desired. Here we just allow scroll */
    /* Alternatively, could implement CSS-only table-to-cards */
  }
  
  .pros-cons-grid {
    grid-template-columns: 1fr;
  }
  
  .sub-ratings {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
}

@media (max-width: 480px) {
  body { font-size: 15px; }
  .btn { width: 100%; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { min-height: 50vh; }
}