/* ==========================================================================
   Starlink VPN (starlinkvpn.club) - Light Mode Theme
   Theme: Bright White / Minimalist Clean Tech / Sapphire Blue & Indigo Accents
   ========================================================================== */

:root {
  --bg-main: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  
  --border-color: #e2e8f0;
  --border-hover: #93c5fd;
  --border-glow: #2563eb;
  
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary: #4f46e5;
  --accent: #0284c7;
  
  --text-main: #0f172a;      /* Bold Black */
  --text-body: #334155;      /* Dark Slate Black */
  --text-muted: #64748b;     /* Medium Slate */
  --text-dim: #94a3b8;       /* Light Slate */
  
  --gradient-primary: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  --gradient-glow: linear-gradient(90deg, #2563eb, #7c3aed);
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 4px 20px rgba(37, 99, 235, 0.25);
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(circle at 10% 10%, rgba(37, 99, 235, 0.03) 0%, transparent 40%),
    radial-gradient(circle at 90% 90%, rgba(124, 58, 237, 0.03) 0%, transparent 40%);
  color: var(--text-main);
  font-family: var(--font-main);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

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

.container {
  width: 90%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Header & Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--text-main);
}

.brand-logo img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.25);
}

.brand-logo span {
  background: linear-gradient(90deg, #0f172a, #2563eb);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-body);
  font-weight: 600;
  font-size: 0.95rem;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Header SEO Recommendation Button */
.btn-recommend {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1d4ed8;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  transition: var(--transition);
}

.btn-recommend:hover {
  background: #dbeafe;
  color: #1e40af;
  border-color: #93c5fd;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.15);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: #ffffff !important;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-glow);
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(37, 99, 235, 0.4);
  color: #ffffff !important;
}

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

/* Hero Section */
.hero-section {
  padding: 160px 0 100px;
  position: relative;
  text-align: center;
  background: radial-gradient(circle at 50% 30%, rgba(219, 234, 254, 0.5) 0%, rgba(255, 255, 255, 1) 70%);
  overflow: hidden;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.18;
  margin-bottom: 24px;
  color: var(--text-main);
  letter-spacing: -1px;
}

.hero-title span {
  background: linear-gradient(90deg, #2563eb, #7c3aed, #0284c7);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shine 5s linear infinite;
}

@keyframes shine {
  to { background-position: 200% center; }
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-body);
  max-width: 760px;
  margin: 0 auto 40px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-weight: 700;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.btn-secondary:hover {
  background: #f8fafc;
  border-color: var(--border-hover);
  color: var(--primary);
  transform: translateY(-1px);
}

/* Metrics Bar */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  padding: 30px;
  border-radius: var(--radius-lg);
  max-width: 960px;
  margin: 0 auto;
}

.stat-item h3 {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 4px;
}

.stat-item p {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
}

/* Features Grid */
.section-title-wrap {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-tag {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 10px;
  display: block;
}

.section-heading {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.features-section {
  padding: 90px 0;
  background: #f8fafc;
  border-top: 1px solid #f1f5f9;
  border-bottom: 1px solid #f1f5f9;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  background: #eff6ff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-main);
}

.feature-card p {
  color: var(--text-body);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Pricing Section */
.pricing-section {
  padding: 90px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;
}

.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.pricing-card:hover {
  box-shadow: var(--shadow-card);
  border-color: var(--border-hover);
}

.pricing-card.featured {
  background: linear-gradient(180deg, #eff6ff 0%, #ffffff 100%);
  border: 2px solid var(--primary);
  transform: scale(1.03);
  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.plan-price {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 24px;
}

.plan-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-features li {
  font-size: 0.9rem;
  color: var(--text-body);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-features li::before {
  content: "✓";
  color: var(--primary);
  font-weight: bold;
}

/* Articles Section */
.articles-section {
  padding: 90px 0;
  background: #f8fafc;
  border-top: 1px solid #f1f5f9;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.article-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.article-tag {
  display: inline-block;
  background: #eff6ff;
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  width: fit-content;
}

.article-card h3 {
  font-size: 1.15rem;
  line-height: 1.45;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}

.article-card p {
  font-size: 0.9rem;
  color: var(--text-body);
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
}

/* Article Detail Page Specifics */
.article-detail-wrap {
  padding: 140px 0 90px;
  max-width: 900px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 40px;
  text-align: center;
}

.article-header h1 {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1.25;
  margin: 16px 0;
  color: var(--text-main);
}

.article-body {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 45px;
  color: #334155;
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-body h2 {
  color: var(--text-main);
  font-size: 1.6rem;
  font-weight: 800;
  margin: 36px 0 16px;
  border-left: 4px solid var(--primary);
  padding-left: 14px;
}

.article-body h3 {
  color: var(--primary);
  font-size: 1.25rem;
  font-weight: 700;
  margin: 28px 0 14px;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin: 0 0 24px 24px;
}

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

.article-cta-box {
  background: linear-gradient(135deg, #eff6ff, #e0e7ff);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-md);
  padding: 30px;
  text-align: center;
  margin: 40px 0;
}

.article-cta-box h3 {
  color: var(--text-main);
  margin-top: 0;
  margin-bottom: 10px;
}

/* Testimonials Section */
.testimonials-section {
  padding: 90px 0;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.stars {
  color: #f59e0b;
  margin-bottom: 14px;
  font-size: 1.1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-body);
  margin-bottom: 20px;
  font-style: italic;
}

.reviewer {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 44px;
  height: 44px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #ffffff;
}

.reviewer-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.reviewer-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Section */
.faq-section {
  padding: 90px 0;
  background: #f8fafc;
  border-top: 1px solid #f1f5f9;
}

.faq-container {
  max-width: 840px;
  margin: 0 auto;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  padding: 22px 28px;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.1rem;
  font-weight: 700;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.4rem;
  transition: var(--transition);
  color: var(--primary);
  font-weight: bold;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 28px;
  color: var(--text-body);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 28px 22px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

/* Footer & PBN Backlinks Area */
.site-footer {
  background: #f8fafc;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  color: var(--text-body);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 0.9rem;
  margin-top: 14px;
  color: var(--text-muted);
  max-width: 320px;
}

.footer-col h4 {
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 18px;
}

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

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: var(--text-body);
  font-size: 0.9rem;
}

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

/* PBN Friendly Links Section - Low key, elegant, dofollow */
.pbn-links-bar {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  margin-top: 30px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.pbn-links-bar span {
  opacity: 0.7;
}

.pbn-links-bar a {
  color: #2563eb;
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  transition: var(--transition);
}

.pbn-links-bar a:hover {
  color: #1d4ed8;
  text-decoration: underline;
}

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 20px;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .features-grid, .articles-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.4rem;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid, .pricing-grid, .articles-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .footer-content {
    grid-template-columns: 1fr;
  }
}