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

:root {
  --primary: #3B82F6;
  --primary-dark: #2563EB;
  --secondary: #10B981;
  --dark: #1F2937;
  --light: #F9FAFB;
  --gray: #6B7280;
  --border: #E5E7EB;
  --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);
  --radius: 12px;
  --radius-sm: 8px;
}

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

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

/* Header */
header {
  background: white;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.logo svg {
  width: 36px;
  height: 36px;
  color: var(--primary);
}

.nav {
  display: flex;
  gap: 30px;
}

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

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

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

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 100px 0 120px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.1;
}

.hero p {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto 40px;
  opacity: 0.95;
}

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

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 20px;
  color: var(--dark);
}

.section-subtitle {
  text-align: center;
  color: var(--gray);
  max-width: 700px;
  margin: 0 auto 60px;
  font-size: 1.1rem;
}

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

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

.feature-card {
  background: var(--light);
  padding: 40px 30px;
  border-radius: var(--radius);
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 15px;
  color: var(--dark);
}

.feature-card p {
  color: var(--gray);
  line-height: 1.7;
}

/* How It Works */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  counter-reset: step;
}

.step-card {
  text-align: center;
  position: relative;
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto 20px;
}

.step-card h3 {
  margin-bottom: 10px;
  font-size: 1.2rem;
}

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

/* CTA Button */
.cta-btn {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 16px 40px;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
  box-shadow: var(--shadow);
}

.cta-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.cta-floating {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 1000;
  padding: 18px 35px;
  font-size: 1.1rem;
  box-shadow: var(--shadow-lg);
  animation: pulse 2s infinite;
}

.btn-secondary {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 16px 40px;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
  box-shadow: var(--shadow);
}

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

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

/* Sections generic */
.bg-light {
  background: var(--light);
}

.bg-white {
  background: white;
}

/* 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: 1.1rem;
  margin-bottom: 20px;
  color: white;
}

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

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

.footer-col a {
  color: #9CA3AF;
  text-decoration: none;
  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: 0.9rem;
}

/* FAQ */
.faq-item {
  background: white;
  border-radius: var(--radius-sm);
  margin-bottom: 15px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.faq-question {
  width: 100%;
  padding: 20px;
  background: white;
  border: none;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--dark);
}

.faq-question:hover {
  background: var(--light);
}

.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 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  color: var(--gray);
}

.faq-answer.open {
  padding: 0 20px 20px;
  max-height: 500px;
}

/* Blog */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.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: 25px;
}

.blog-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
  color: var(--dark);
}

.blog-card p {
  color: var(--gray);
  margin-bottom: 20px;
  line-height: 1.7;
}

.blog-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

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

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

.article-content h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  line-height: 1.2;
}

.article-meta {
  color: var(--gray);
  margin-bottom: 30px;
  font-size: 0.95rem;
}

.article-content p {
  margin-bottom: 20px;
  line-height: 1.8;
  color: var(--dark);
}

.article-content h2 {
  font-size: 1.8rem;
  margin: 40px 0 20px;
  color: var(--dark);
}

.article-content h3 {
  font-size: 1.4rem;
  margin: 30px 0 15px;
  color: var(--dark);
}

.article-content ul {
  margin-bottom: 20px;
  padding-left: 25px;
}

.article-content li {
  margin-bottom: 10px;
  line-height: 1.7;
  color: var(--dark);
}

.article-content .back-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  margin-bottom: 30px;
}

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

.related-posts {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.related-posts h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.related-list {
  list-style: none;
}

.related-list li {
  margin-bottom: 15px;
}

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

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

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

.form-group {
  margin-bottom: 25px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: border-color 0.2s;
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
}

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

/* Utility */
.text-center {
  text-align: center;
}

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

.mb-40 {
  margin-bottom: 40px;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: white;
  padding: 20px;
  box-shadow: var(--shadow-lg);
  flex-direction: column;
  gap: 15px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  padding: 12px 20px;
  color: var(--dark);
  text-decoration: none;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background 0.2s;
}

.mobile-menu a:hover {
  background: var(--light);
}

/* Responsive */
@media (max-width: 768px) {
  .nav {
    display: none;
  }

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

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

  .hero p {
    font-size: 1.1rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .cta-floating {
    bottom: 20px;
    right: 20px;
    padding: 15px 25px;
    font-size: 1rem;
  }
}

/* Utility classes */
.text-muted {
  color: #9CA3AF;
  line-height: 1.7;
}

.text-primary {
  color: var(--primary);
}

.mt-4 {
  margin-top: 1.5rem;
}

.py-4 {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

.my-4 {
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .container {
    padding: 0 15px;
  }

  section {
    padding: 60px 0;
  }
}