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

:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #8b5cf6;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --bg-light: #f9fafb;
  --bg-white: #ffffff;
  --border-color: #e5e7eb;
  --success-color: #10b981;
  --warning-color: #f59e0b;
}

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

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

/* Header */
.site-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

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

.nav-link {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 16px;
  padding: 8px 0;
  border-bottom: 3px solid transparent;
  transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 100px 0;
  text-align: center;
}

.hero-content h1 {
  font-size: 48px;
  margin-bottom: 20px;
  font-weight: 700;
}

.hero-content p {
  font-size: 20px;
  margin-bottom: 40px;
  opacity: 0.9;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  font-size: 16px;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

/* Sections */
.section {
  padding: 80px 0;
  background: var(--bg-white);
}

.section-alt {
  background: var(--bg-light);
}

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

.section-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
}

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

.feature-card {
  padding: 30px;
  background: var(--bg-white);
  border-radius: 8px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.section-alt .feature-card {
  background: var(--bg-white);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  font-size: 40px;
  margin-bottom: 15px;
  display: block;
}

.feature-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  color: var(--text-primary);
}

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

/* Screenshot */
.screenshot {
  text-align: center;
}

.screenshot img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.screenshot img:hover {
  transform: scale(1.02);
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

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

.screenshot-item img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.screenshot-item h3 {
  margin-top: 15px;
  color: var(--text-primary);
  font-size: 16px;
}

/* Footer */
.site-footer {
  background: var(--text-primary);
  color: white;
  padding: 40px 0;
  text-align: center;
}

.footer-content {
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 14px;
}

.footer-links a {
  color: #d1d5db;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-links span {
  color: #6b7280;
}

/* Responsive */
@media (max-width: 768px) {
  .hero-content h1 {
    font-size: 32px;
  }

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

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

  .nav {
    gap: 15px;
  }

  .nav-link {
    font-size: 14px;
  }

  .section {
    padding: 50px 0;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

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

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

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

.py-40 {
  padding-top: 40px;
  padding-bottom: 40px;
}