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

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  
  --bg-primary: #ffffff;
  --bg-secondary: #fbfbfb;
  --bg-accent: #f4f4f5;
  --text-primary: #0a0a0a;
  --text-secondary: #4a4a4a;
  --text-muted: #71717a;
  --border-color: #e4e4e7;
  --border-color-dark: #27272a;
  --accent-color: #000000;
  --accent-glow: rgba(0, 0, 0, 0.05);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
}

body {
  font-family: var(--font-sans);
  background-color: transparent;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Fixed Animated Canvas Background */
#canvas-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  text-align: center;
  position: relative;
}

h2::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background-color: var(--accent-color);
  margin: 0.75rem auto 0;
  border-radius: 2px;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-primary {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border: 1px solid var(--text-primary);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color-dark);
}

.btn-secondary:hover {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  transform: translateY(-2px);
}

/* Navigation Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
  text-decoration: none;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo span {
  font-weight: 400;
  font-size: 0.85rem;
  background-color: var(--bg-accent);
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

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

/* Hero Section */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-tagline {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background-color: var(--bg-accent);
  border: 1px solid var(--border-color);
  padding: 0.35rem 1rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 3rem;
  letter-spacing: -0.03em;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 2.5rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

/* Features Section */
.features {
  padding: 4rem 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  border-radius: var(--radius-md);
  transition: var(--transition-smooth);
}

.feature-card:hover {
  border-color: var(--text-primary);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

/* Pricing Section */
.pricing {
  padding: 4rem 0;
  background-color: rgba(251, 251, 251, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
  align-items: stretch;
}

.pricing-card {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}

.pricing-card.popular {
  border-color: var(--text-primary);
  border-width: 2px;
  position: relative;
}

.pricing-card.popular::before {
  content: 'POPULAR';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--text-primary);
  color: var(--bg-primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.75rem;
  border-radius: 20px;
  letter-spacing: 0.05em;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.04);
}

.pricing-header {
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
}

.pricing-level {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-primary);
}

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

.pricing-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.pricing-features li {
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pricing-features li::before {
  content: '✓';
  color: var(--text-primary);
  font-weight: bold;
}

.pricing-card .btn {
  width: 100%;
}

/* Articles Section */
.articles-sec {
  padding: 4rem 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.article-card {
  background-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  border-color: var(--text-primary);
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.03);
}

.article-card-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  display: flex;
  gap: 1rem;
}

.article-title-link {
  text-decoration: none;
  color: inherit;
}

.article-title-link:hover h3 {
  text-decoration: underline;
}

.article-card h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.article-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.article-card .read-more {
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: var(--transition-smooth);
}

.article-card .read-more:hover {
  gap: 0.5rem;
}

/* User Reviews */
.reviews {
  padding: 4rem 0;
  background-color: rgba(251, 251, 251, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.review-card {
  background-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.01);
}

.review-stars {
  color: #000000;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 1.5rem;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--bg-accent);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.user-info h4 {
  font-size: 0.9rem;
  margin-bottom: 0.15rem;
}

.user-info p {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* FAQ Section */
.faq {
  padding: 4rem 0 6rem;
}

.faq-container {
  max-width: 800px;
  margin: 3rem auto 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  text-align: left;
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease-out;
  padding: 0 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  border-top: 0 solid var(--border-color);
}

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

.faq-item.active .faq-answer {
  max-height: 250px;
  padding: 1rem 1.5rem 1.5rem;
  border-top-width: 1px;
}

.faq-icon {
  font-size: 0.8rem;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

/* Article Page Layout Styles */
.article-page {
  padding: 3rem 0 6rem;
}

.article-container {
  max-width: 800px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
}

.article-header h1 {
  font-size: 2.25rem;
  margin-top: 1rem;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-body h2 {
  text-align: left;
  font-size: 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 1.25rem;
}

.article-body h2::after {
  margin: 0.5rem 0 0;
}

.article-body h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body ul, .article-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-body li {
  margin-bottom: 0.5rem;
}

.article-body a {
  color: var(--accent-color);
  text-decoration: underline;
  font-weight: 500;
}

.article-body a:hover {
  opacity: 0.8;
}

/* Callout Box inside Articles */
.article-callout {
  background-color: var(--bg-secondary);
  border-left: 4px solid var(--text-primary);
  padding: 1.5rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 2rem 0;
}

.article-callout p {
  margin-bottom: 0;
  font-weight: 500;
  color: var(--text-primary);
}

/* Internal Linking Widget at footer of articles */
.article-navigation {
  margin-top: 4rem;
  border-top: 1px solid var(--border-color);
  padding-top: 3rem;
}

.article-navigation h3 {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.related-articles-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  list-style: none;
}

@media (max-width: 600px) {
  .related-articles-list {
    grid-template-columns: 1fr;
  }
}

.related-article-link {
  display: block;
  padding: 1.25rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

.related-article-link:hover {
  border-color: var(--text-primary);
  background-color: var(--bg-secondary);
}

.related-article-link span {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  background-color: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-brand p {
  color: var(--text-muted);
  max-width: 320px;
}

.footer-links h4 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

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

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  text-decoration: none;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Responsive Overrides */
@media (max-width: 900px) {
  h1 { font-size: 2.25rem; }
  .hero h1 { font-size: 2.5rem; }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .nav-links {
    display: none; /* simple hidden nav link on mobile for clean design */
  }
  .hero {
    padding: 3rem 0 2rem;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
    padding: 0 2rem;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
    padding: 0 1rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .feature-card, .article-card-content, .review-card {
    padding: 1.5rem;
  }
  .article-header h1 {
    font-size: 1.75rem;
  }
}