:root {
  --primary-color: #171717;
  --background-color: #fafafa;
  --white-color: #ffffff;
  --text-color: #171717;
  --secondary-color: #666666;
  --border-color: #e5e5e5;
  --hover-color: #333333;
}

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

body {
  font-family: 'Geist', 'Geist Fallback', Arial, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  font-size: 16px;
  line-height: 1.6;
}

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

header {
  background-color: transparent;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.logo {
  font-size: 24px;
  font-weight: 600;
  color: var(--primary-color);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo::before {
  content: "◆";
  margin-right: 8px;
  color: #0070f3;
  font-size: 20px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

nav a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 400;
  font-size: 16px;
  transition: color 0.2s ease;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  height: 40px;
  border-radius: 100px;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

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

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

.btn-secondary {
  background-color: var(--white-color);
  color: var(--primary-color);
  border: 1px solid var(--border-color);
}

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

main {
  margin-top: 64px;
}

.hero {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(135deg, var(--background-color) 0%, #f0f0f0 100%);
}

.hero h1 {
  font-size: 48px;
  font-weight: 600;
  line-height: 48px;
  letter-spacing: -2.4px;
  color: var(--primary-color);
  margin-bottom: 24px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero p {
  font-size: 20px;
  color: var(--secondary-color);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero-image {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 36px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 48px;
  color: var(--primary-color);
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  margin-top: 48px;
}

.feature {
  text-align: center;
  padding: 32px;
  background: var(--white-color);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-color);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--white-color);
  font-size: 24px;
}

.feature h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--primary-color);
}

.feature p {
  color: var(--secondary-color);
  line-height: 1.6;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin-top: 48px;
}

.pricing-card {
  background: var(--white-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--primary-color);
  transform: scale(1.05);
}

.pricing-card h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--primary-color);
}

.pricing-card .price {
  font-size: 48px;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.pricing-card .price-unit {
  font-size: 16px;
  color: var(--secondary-color);
  margin-bottom: 24px;
}

.pricing-features {
  list-style: none;
  margin-bottom: 32px;
}

.pricing-features li {
  padding: 8px 0;
  color: var(--secondary-color);
}

.pricing-features li::before {
  content: "✓";
  color: #22c55e;
  font-weight: bold;
  margin-right: 8px;
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background: var(--white-color);
  padding: 48px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--primary-color);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 16px;
  font-family: inherit;
  transition: border-color 0.2s ease;
}

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

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

.contact-info {
  background: var(--white-color);
  padding: 32px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  margin-top: 48px;
}

.contact-info h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--primary-color);
}

.contact-info p {
  margin-bottom: 8px;
  color: var(--secondary-color);
}

.contact-info strong {
  color: var(--primary-color);
}

footer {
  background: var(--primary-color);
  color: var(--white-color);
  padding: 48px 0 24px;
  margin-top: 80px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 32px;
}

.footer-section h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
}

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

.footer-section ul li {
  margin-bottom: 8px;
}

.footer-section ul li a {
  color: #cccccc;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-section ul li a:hover {
  color: var(--white-color);
}

.footer-bottom {
  border-top: 1px solid #333333;
  padding-top: 24px;
  text-align: center;
  color: #cccccc;
}

.mobile-menu {
  display: none;
}

.thank-you-message {
  background: #22c55e;
  color: white;
  padding: 16px;
  border-radius: 8px;
  margin-bottom: 24px;
  text-align: center;
  display: none;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
    line-height: 40px;
    letter-spacing: -1.8px;
  }
  
  .hero p {
    font-size: 18px;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .features {
    grid-template-columns: 1fr;
  }
  
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .contact-form {
    padding: 32px 24px;
  }
  
  nav ul {
    display: none;
  }
  
  .mobile-menu {
    display: block;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
  }
  
  .container {
    padding: 0 16px;
  }
  
  header {
    padding: 0 16px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 28px;
    line-height: 32px;
    letter-spacing: -1.4px;
  }
  
  .section-title {
    font-size: 28px;
  }
  
  .feature {
    padding: 24px;
  }
  
  .pricing-card {
    padding: 24px;
  }
}