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

:root {
  --primary: #667eea;
  --primary-dark: #764ba2;
  --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --text: #1f2937;
  --text-light: #6b7280;
  --bg: #ffffff;
  --bg-alt: #f9fafb;
  --border: #e5e7eb;
  --radius: 12px;
  --radius-lg: 20px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
}

.logo-icon {
  font-size: 24px;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-light);
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s;
}

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
}

/* Hero Section */
.hero {
  padding: 140px 0 80px;
  text-align: center;
  background: linear-gradient(180deg, #f8f9ff 0%, #ffffff 100%);
}

.hero-container {
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
  border: 1px solid rgba(102, 126, 234, 0.2);
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px 24px;
  margin-bottom: 40px;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
}

.hero-feature svg {
  color: #10b981;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient);
  color: white;
  box-shadow: 0 4px 14px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  margin-top: 48px;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.stat-label {
  font-size: 13px;
  color: var(--text-light);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* Preview Section */
.preview {
  padding: 40px 0 80px;
}

.preview-window {
  background: #1a1a2e;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.15);
  max-width: 900px;
  margin: 0 auto;
}

.preview-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: #252540;
}

.preview-dots {
  display: flex;
  gap: 8px;
}

.preview-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #3b3b5c;
}

.preview-dots span:nth-child(1) { background: #ff5f57; }
.preview-dots span:nth-child(2) { background: #febc2e; }
.preview-dots span:nth-child(3) { background: #28c840; }

.preview-title {
  flex: 1;
  text-align: center;
  color: #8b8ba7;
  font-size: 13px;
}

.preview-content {
  padding: 20px;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-image {
  max-width: 100%;
  border-radius: 8px;
}

.preview-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: #8b8ba7;
}

.preview-emoji {
  font-size: 64px;
}

/* Features Section */
.features {
  padding: 100px 0;
  background: var(--bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-badge {
  display: inline-block;
  background: var(--gradient);
  color: white;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 17px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

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

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

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.feature-icon {
  font-size: 40px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-light);
  font-size: 15px;
  line-height: 1.6;
}

/* How It Works */
.how-it-works {
  padding: 100px 0;
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  min-width: 250px;
  max-width: 320px;
  text-align: center;
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--gradient);
  color: white;
  font-size: 24px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.step-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-content p {
  color: var(--text-light);
  font-size: 15px;
}

.step-arrow {
  font-size: 32px;
  color: var(--border);
  padding-top: 14px;
}

/* FAQ Section */
.faq {
  padding: 100px 0;
  background: var(--bg-alt);
}

.faq-list {
  max-width: 700px;
  margin: 0 auto;
}

.faq-item {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 24px;
  color: var(--text-light);
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding: 0 24px 20px;
  color: var(--text-light);
  line-height: 1.7;
}

/* CTA Section */
.cta {
  padding: 100px 0;
  background: var(--gradient);
}

.cta-content {
  text-align: center;
  color: white;
}

.cta-content h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-content p {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 32px;
}

.cta .btn-primary {
  background: white;
  color: var(--primary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.cta .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

/* Footer */
.footer {
  padding: 60px 0 40px;
  background: #1a1a2e;
  color: white;
}

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

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 32px;
}

.footer-links a {
  color: #a0a0b8;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

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

.footer-bottom {
  color: #6b6b80;
  font-size: 13px;
}

.footer-bottom a {
  color: var(--primary);
  text-decoration: none;
}

/* Privacy Page */
.privacy-section {
  padding: 140px 0 80px;
}

.privacy-content {
  max-width: 700px;
  margin: 0 auto;
}

.privacy-content h1 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 8px;
}

.last-updated {
  color: var(--text-light);
  font-size: 14px;
  margin-bottom: 32px;
}

.privacy-highlight {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
  padding: 16px 20px;
  border-radius: var(--radius);
  margin-bottom: 32px;
  font-size: 15px;
  line-height: 1.6;
}

.privacy-content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 32px 0 16px;
  color: var(--text);
}

.privacy-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 12px;
  color: var(--text);
}

.privacy-content p {
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.7;
}

.privacy-content ul {
  margin-bottom: 16px;
  padding-left: 24px;
}

.privacy-content li {
  color: var(--text-light);
  margin-bottom: 8px;
  line-height: 1.6;
}

.privacy-content code {
  background: var(--bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
}

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

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

.privacy-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }

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

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

  .hero {
    padding: 120px 0 60px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .stat-divider {
    display: none;
  }

  .step-arrow {
    display: none;
  }

  .steps {
    flex-direction: column;
    align-items: center;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }
}