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

:root {
  --primary: #3B82F6;
  --primary-dark: #2563EB;
  --secondary: #10B981;
  --dark: #1F2937;
  --light: #F9FAFB;
  --gray: #6B7280;
  --border: #E5E7EB;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background: var(--light);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo svg {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--gray);
  font-weight: 500;
  transition: color 0.2s;
}

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
  stroke: var(--dark);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero p {
  font-size: 20px;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 40px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: white;
  color: var(--primary);
}

.btn-primary:hover {
  background: var(--light);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
}

.btn-secondary:hover {
  background: white;
  color: var(--primary);
}

.cta-btn {
  background: var(--primary);
  color: white;
}

.cta-btn:hover {
  background: var(--primary-dark);
}

.cta-floating {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 16px 28px;
  font-size: 16px;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
  z-index: 1000;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* Sections */
section {
  padding: 80px 0;
}

.section-title {
  font-size: 36px;
  text-align: center;
  margin-bottom: 16px;
}

.section-subtitle {
  text-align: center;
  color: var(--gray);
  max-width: 600px;
  margin: 0 auto 48px;
  font-size: 18px;
}

/* Features */
.features {
  background: white;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.feature-card {
  text-align: center;
  padding: 32px;
  border-radius: 12px;
  background: var(--light);
  transition: transform 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
}

.feature-card svg {
  width: 48px;
  height: 48px;
  color: var(--primary);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--gray);
}

/* CTA Section */
.cta-section {
  background: var(--dark);
  color: white;
  text-align: center;
  padding: 80px 0;
}

.cta-section h2 {
  font-size: 36px;
  margin-bottom: 20px;
}

.cta-section p {
  max-width: 600px;
  margin: 0 auto 32px;
  opacity: 0.9;
}

/* Footer */
footer {
  background: var(--dark);
  color: white;
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 16px;
  margin-bottom: 20px;
  color: white;
}

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

.footer-col a {
  color: #9CA3AF;
  text-decoration: none;
  display: block;
  padding: 6px 0;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: 30px;
  text-align: center;
  color: #9CA3AF;
  font-size: 14px;
}

/* Mobile */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    gap: 16px;
  }

  .nav-links.active {
    display: flex;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero p {
    font-size: 16px;
  }

  .section-title {
    font-size: 28px;
  }
}

/* Blog */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.blog-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: transform 0.2s;
}

.blog-card:hover {
  transform: translateY(-4px);
}

.blog-card-content {
  padding: 24px;
}

.blog-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  line-height: 1.4;
}

.blog-card p {
  color: var(--gray);
  font-size: 14px;
  margin-bottom: 20px;
}

/* Article */
.article-header {
  background: var(--primary);
  color: white;
  padding: 60px 0;
  margin-bottom: 40px;
}

.article-header h1 {
  font-size: 36px;
  max-width: 800px;
}

.article-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.article-content p {
  margin-bottom: 20px;
  font-size: 18px;
  line-height: 1.8;
}

.article-content h2 {
  font-size: 28px;
  margin: 40px 0 20px;
}

.article-content ul {
  margin-bottom: 20px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 10px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 24px;
}

.back-link:hover {
  text-decoration: underline;
}

/* Form */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 16px;
  font-family: inherit;
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 32px;
  margin-top: 60px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.contact-item svg {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

/* FAQ */
.faq-item {
  background: white;
  border-radius: 8px;
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.faq-question {
  width: 100%;
  padding: 20px;
  background: none;
  border: none;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question svg {
  width: 20px;
  height: 20px;
  transition: transform 0.3s;
}

.faq-question.active svg {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 20px 20px;
  color: var(--gray);
  display: none;
}

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

/* Utility classes to replace inline styles */
.btn-sm {
  font-size: 14px;
  padding: 10px 20px;
}

.btn-lg {
  padding: 14px 32px;
  border-radius: 8px;
}

.cta-container {
  text-align: center;
  margin-top: 40px;
}

.mr-2 {
  margin-right: 16px;
}

.ml-2 {
  margin-left: 16px;
}

.footer-desc {
  color: #9CA3AF;
  line-height: 1.6;
}

.mb-32 {
  margin-bottom: 32px;
}

.text-center {
  text-align: center;
}

.mt-40 {
  margin-top: 40px;
}

.mt-24 {
  margin-top: 24px;
}

.lg-text {
  font-size: 18px;
}

.cta-section.primary {
  background: var(--primary);
  padding: 60px 0;
  text-align: center;
  color: white;
}
.cta-section.primary h2 {
  font-size: 28px;
  margin-bottom: 16px;
}
.cta-section.primary p {
  max-width: 600px;
  margin: 0 auto 24px;
  opacity: 0.9;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 24px;
}
.back-link:hover {
  text-decoration: underline;
}

.cta-center {
  text-align: center;
  margin: 24px 0;
}

.related-articles {
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}
.related-articles h2 {
  font-size: 24px;
  margin-bottom: 16px;
}
.related-articles ul {
  list-style: none;
  padding-left: 0;
}
.related-articles li {
  margin-bottom: 10px;
}
.related-articles a {
  color: var(--primary);
  text-decoration: none;
}
.related-articles a:hover {
  text-decoration: underline;
}