:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --secondary: #10b981;
  --text: #1f2937;
  --text-light: #1f2937;
  --bg: #ffffff;
  --bg-light: #f3f4f6;
  --bg-dark: #111827;
  --max-width: 1200px;
  --radius: 12px;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid #e5e7eb;
  box-shadow: var(--shadow);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.logo svg {
  width: 40px;
  height: 40px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

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

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-btn svg {
  width: 28px;
  height: 28px;
  stroke: var(--text);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  padding: 5rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  color: var(--bg-dark);
  line-height: 1.1;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-light);
  max-width: 700px;
  margin: 0 auto 2.5rem;
}

/* CTA Buttons */
.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: white;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border: none;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 25px -5px rgba(59, 130, 246, 0.4);
}

.cta-btn.btn-large {
  font-size: 1.25rem;
  padding: 1.25rem 3rem;
}

.cta-floating {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  padding: 1rem 2rem;
  border-radius: 50px;
  animation: pulse 2s infinite;
}

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

/* Sections */
section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--bg-dark);
}

/* Features Grid */
.features {
  background: var(--bg-light);
}

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

.feature-card {
  background: white;
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-card svg {
  width: 48px;
  height: 48px;
  color: var(--primary);
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--bg-dark);
}

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

/* Content Sections */
.content-section {
  max-width: 800px;
  margin: 0 auto;
}

.content-section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--bg-dark);
}

.content-section p {
  margin-bottom: 1.25rem;
  color: var(--text-light);
}

.content-section.text-center > p.lead {
  font-size: 1.1rem;
  color: var(--text-light);
  margin: 1rem 0 2rem;
}

/* Two Column */
.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}

.two-column img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.two-column svg {
  width: 100%;
  height: 400px;
  color: var(--primary);
}

/* Steps for How It Works */
.steps-grid {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
}

.step-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.step-number {
  background: var(--primary);
  color: white;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  flex-shrink: 0;
}

.step-item h3 {
  margin-bottom: 0.5rem;
}

.step-item p {
  color: var(--text-light);
}

/* Stats */
.stats {
  background: var(--bg-dark);
  color: white;
  padding: 4rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--primary);
  display: block;
}

.stat-label {
  font-size: 1rem;
  color: #9ca3af;
}

/* Footer */
footer {
  background: var(--bg-dark);
  color: #d1d5db;
  padding: 4rem 0 2rem;
}

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

.footer-brand p {
  margin-top: 1rem;
  color: #9ca3af;
}

.footer-brand .logo {
  color: white;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand .logo svg {
  width: 40px;
  height: 40px;
}

.footer-links h4 {
  color: white;
  margin-bottom: 1rem;
  font-size: 1rem;
}

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

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: #9ca3af;
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-bottom {
  border-top: 1px solid #374151;
  padding-top: 2rem;
  text-align: center;
  color: #9ca3af;
  font-size: 0.9rem;
}

/* Blog */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.blog-card {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.blog-card:hover {
  transform: translateY(-5px);
}

.blog-card-content {
  padding: 1.5rem;
}

.blog-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  color: var(--bg-dark);
}

.blog-card p {
  color: var(--text-light);
  margin-bottom: 1rem;
}

.blog-card a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

/* Article */
.article-content {
  max-width: 800px;
  margin: 0 auto;
}

.article-content h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  color: var(--bg-dark);
}

.article-meta {
  color: var(--text-light);
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.article-content h2 {
  font-size: 1.75rem;
  margin: 2rem 0 1rem;
  color: var(--bg-dark);
}

.article-content p {
  margin-bottom: 1.25rem;
  color: var(--text-light);
}

.article-content ul, .article-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
  color: var(--text-light);
}

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

.content-section a {
  color: var(--primary);
  text-decoration: none;
}

.content-section a:hover {
  text-decoration: underline;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  margin-bottom: 2rem;
}

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

/* Related Articles */
.related-articles {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid #e5e7eb;
}

.related-articles ul {
  margin-top: 1rem;
}

.related-articles .related-cta {
  margin-top: 2rem;
}

.related-articles .related-cta.text-center {
  text-align: center;
}

.related-articles a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.related-articles a:hover {
  text-decoration: underline;
}

.related-list {
  margin-top: 1rem;
  padding-left: 1.5rem;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  gap: 2rem;
}

.testimonial-card {
  background: var(--bg-light);
  padding: 2rem;
  border-radius: var(--radius);
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.testimonial-header svg {
  width: 48px;
  height: 48px;
  color: var(--primary);
}

.testimonial-header h3 {
  margin-bottom: 0.25rem;
}

.testimonial-author {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.testimonial-item {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.testimonial-item > div {
  flex: 1;
  min-width: 300px;
}

.testimonial-item svg {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  color: var(--primary);
}

.testimonial-item h3 {
  margin-bottom: 0.5rem;
}

.testimonial-item p.author {
  color: var(--text-light);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.testimonial-cta-section {
  text-align: center;
  margin-top: 3rem;
}

/* FAQ */
.faq-item {
  background: white;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--bg-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question svg {
  width: 20px;
  height: 20px;
  transition: transform 0.3s;
  color: var(--primary);
}

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

.faq-answer {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer.active {
  padding: 0 1.5rem 1.25rem;
  max-height: 500px;
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--bg-dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

/* Mobile */
@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }

  nav ul {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s, opacity 0.3s;
  }

  nav ul.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .two-column {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .cta-floating {
    bottom: 1rem;
    right: 1rem;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }
}

/* Utility */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }
.pt-2 { padding-top: 2rem; }
.border-top { border-top: 1px solid #e5e7eb; }
.bg-white { background: white; }
.text-sm { font-size: 0.9rem; color: var(--text-light); }