/* ==========================================================================
   FlyBit (flybit1.cfd) - Main Style Sheet
   Modern Futuristic Dark Theme & High-Converting SEO Design
   ========================================================================== */

:root {
  --bg-dark: #0b0f19;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(28, 36, 56, 0.85);
  --border-color: rgba(255, 255, 255, 0.1);
  --primary-cyan: #06b6d4;
  --primary-blue: #3b82f6;
  --primary-indigo: #6366f1;
  --accent-glow: rgba(6, 182, 212, 0.25);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shadow-glow: 0 0 25px rgba(6, 182, 212, 0.15);
}

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

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

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 60%, rgba(6, 182, 212, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 50% 90%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography & Utilities */
h1, h2, h3, h4, h5, h6 {
  color: #ffffff;
  font-weight: 700;
  line-height: 1.25;
}

.gradient-text {
  background: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Header Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 12px 0;
  transition: all 0.3s ease;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-logo img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.4);
}

.brand-name {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #ffffff;
}

.brand-name span {
  color: var(--primary-cyan);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.5);
  filter: brightness(1.1);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
}

.btn-recommend {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-recommend:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

/* Mobile Nav Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: #ffffff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero-section {
  padding: 140px 0 80px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--primary-cyan);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-features-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  max-width: 1000px;
  margin: 0 auto;
}

.strip-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  backdrop-filter: blur(8px);
}

.strip-icon {
  font-size: 1.8rem;
  color: var(--primary-cyan);
}

.strip-text h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.strip-text p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 50px;
}

.section-tag {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary-cyan);
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

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

/* Feature Cards Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(6, 182, 212, 0.4);
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}

.feature-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.pricing-card.popular {
  border-color: var(--primary-cyan);
  background: rgba(18, 30, 52, 0.9);
  box-shadow: 0 0 30px rgba(6, 182, 212, 0.2);
}

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
  color: #fff;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.plan-name {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.plan-price {
  font-size: 2.4rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

.plan-price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-muted);
}

.plan-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-features li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

/* Articles Showcase */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  border-color: var(--primary-cyan);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.article-tag {
  align-self: flex-start;
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.article-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-card h3 a {
  color: #fff;
  text-decoration: none;
  transition: color 0.2s;
}

.article-card h3 a:hover {
  color: var(--primary-cyan);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  flex-grow: 1;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 12px;
}

.article-read-more {
  color: var(--primary-cyan);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-read-more:hover {
  text-decoration: underline;
}

/* User Reviews Section */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.review-stars {
  color: #f59e0b;
  margin-bottom: 12px;
  font-size: 1.1rem;
}

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

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

.avatar-circle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-cyan), var(--primary-indigo));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
}

.author-info h4 {
  font-size: 0.95rem;
}

.author-info p {
  font-size: 0.8rem;
  color: var(--text-dim);
}

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

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s;
}

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

.faq-question {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  user-select: none;
}

.faq-icon {
  font-size: 1.2rem;
  color: var(--primary-cyan);
  transition: transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* Core Task 2: Footer & PBN Links Channel */
footer {
  background: #070a12;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  text-align: center;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  margin-bottom: 40px;
}

.footer-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

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

.footer-copyright {
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* Footer PBN Dofollow Links Area (Core Task 2 Requirement) */
.footer-pbn {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 20px;
  margin-top: 20px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.45);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-pbn-title {
  color: rgba(255, 255, 255, 0.35);
  font-weight: 500;
}

.footer-pbn a {
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: color 0.2s ease, text-decoration 0.2s ease;
}

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

/* Article Page Layout */
.article-header {
  padding: 140px 0 40px;
  text-align: center;
}

.article-header h1 {
  font-size: 2.4rem;
  margin-bottom: 16px;
}

.article-content {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: #cbd5e1;
}

.article-content h2 {
  font-size: 1.6rem;
  margin: 36px 0 16px;
  color: #38bdf8;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 8px;
}

.article-content h3 {
  font-size: 1.3rem;
  margin: 28px 0 12px;
  color: #f1f5f9;
}

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

.article-content ul, .article-content ol {
  margin: 0 0 20px 24px;
}

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

.article-content blockquote {
  border-left: 4px solid var(--primary-cyan);
  background: rgba(6, 182, 212, 0.08);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  font-style: italic;
}

.article-cta-box {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(99, 102, 241, 0.15));
  border: 1px solid var(--primary-cyan);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  margin: 40px 0;
}

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

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.4rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  .hero-title {
    font-size: 2rem;
  }
  .article-content {
    padding: 24px;
  }
}