/* ==========================================================================
   OpenDesign System Architecture - DR VPN Guide
   Design System Contract & Tokens
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@500;600;700;800&display=swap');

:root {
  /* Color Palette - Core Tokens */
  --bg-dark: #090d16;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(28, 36, 56, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-glass-heavy: rgba(15, 22, 36, 0.85);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(59, 130, 246, 0.3);
  --border-glow: rgba(16, 185, 129, 0.4);

  /* Primary Brand Colors */
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-azure: #3b82f6;
  --accent-azure-glow: rgba(59, 130, 246, 0.25);
  --accent-violet: #8b5cf6;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;

  /* Text Colors */
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  --text-inverse: #090d16;

  /* Typography Tokens */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Radius & Shadows */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.15);
  --shadow-emerald: 0 0 30px rgba(16, 185, 129, 0.2);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(59, 130, 246, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 65%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 80px;
}

/* Layout System */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 40px;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-main);
  backdrop-filter: blur(12px);
}

.flag-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 2px;
}

.flag-svg {
  width: 22px;
  height: 15px;
  border-radius: 3px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.4);
  vertical-align: middle;
  display: inline-block;
}

.inline-flag {
  margin-left: 6px;
  width: 20px;
  height: 14px;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-emerald);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 0.6; transform: scale(0.95); }
  50% { opacity: 1; transform: scale(1.15); }
  100% { opacity: 0.6; transform: scale(0.95); }
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 30px 0 50px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-emerald);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #ffffff 30%, #9ca3af 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-featured-image {
  width: 100%;
  max-width: 960px;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-accent);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 40px rgba(59, 130, 246, 0.2);
  margin: 10px auto 40px;
  display: block;
}

.pain-points-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: left;
  backdrop-filter: blur(10px);
  transition: var(--transition-fast);
}

.pain-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-accent);
}

.pain-icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.pain-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

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

/* Analogy Section */
.section {
  margin-top: 60px;
}

.section-header {
  margin-bottom: 28px;
}

.section-tag {
  color: var(--accent-azure);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  margin-top: 6px;
}

.analogy-box {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.12) 0%, rgba(139, 92, 246, 0.08) 100%);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-lg);
  padding: 32px;
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.analogy-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-azure), var(--accent-violet));
}

.analogy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 20px;
}

@media (max-width: 768px) {
  .analogy-grid {
    grid-template-columns: 1fr;
  }
}

.analogy-col {
  background: rgba(9, 13, 22, 0.6);
  padding: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.analogy-col h4 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--accent-azure);
  margin-bottom: 8px;
}

/* Interactive Quiz Widget */
.quiz-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-top: 40px;
  box-shadow: var(--shadow-glow);
}

.quiz-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.quiz-btn {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 16px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.quiz-btn:hover, .quiz-btn.active {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--accent-azure);
  transform: translateY(-2px);
}

.quiz-result {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--accent-emerald);
  padding: 20px;
  border-radius: var(--radius-md);
  margin-top: 20px;
  display: none;
  animation: fadeIn 0.3s ease-in-out forwards;
}

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

/* VPN Cards Grid */
.vpn-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 30px;
}

.vpn-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

.vpn-card.featured {
  border-color: var(--accent-emerald);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.08) 0%, var(--bg-card) 100%);
  box-shadow: var(--shadow-emerald);
}

.badge-top {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--accent-emerald);
  color: var(--text-inverse);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-azure {
  background: var(--accent-azure);
  color: #fff;
}

.badge-violet {
  background: var(--accent-violet);
  color: #fff;
}

.vpn-header {
  margin-bottom: 20px;
}

.vpn-name {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.vpn-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.vpn-price {
  margin: 16px 0;
  font-size: 1.8rem;
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--text-main);
}

.vpn-price span {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-muted);
}

.vpn-features {
  list-style: none;
  margin: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.vpn-features li {
  font-size: 0.92rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
}

.vpn-features li::before {
  content: '✓';
  color: var(--accent-emerald);
  font-weight: 800;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
}

.btn-primary {
  background: var(--accent-emerald);
  color: var(--text-inverse);
}

.btn-primary:hover {
  background: #0ea5e9;
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
}

.btn-secondary {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-muted);
}

/* Interactive Matrix Table */
.table-container {
  overflow-x: auto;
  margin-top: 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 10px;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.comparison-table th, .comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table th {
  font-family: var(--font-heading);
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

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

.rating-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.85rem;
}

.rating-excellent {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
}

.rating-good {
  background: rgba(59, 130, 246, 0.2);
  color: var(--accent-azure);
}

/* Device Setup Selector Tabs */
.tabs-header {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  overflow-x: auto;
  padding-bottom: 8px;
}

.tab-btn {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.tab-btn:hover, .tab-btn.active {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--accent-azure);
  color: var(--text-main);
}

.steps-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
}

.step-number {
  width: 36px;
  height: 36px;
  background: var(--accent-azure);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  margin-bottom: 16px;
}

.step-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;

}

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

/* Pro-Tips Box */
.tip-box {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-top: 36px;
}

.tip-title {
  color: var(--accent-amber);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 24px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-fast);
}

.faq-question {
  padding: 20px 24px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.05rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  display: none;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 14px;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active {
  border-color: var(--border-accent);
}

/* Footer */
.footer {
  margin-top: 80px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 30px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.9rem;
}