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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #2c3e50;
  background: #f4f7f9;
}

.header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 20px 0;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

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

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: white;
}

.logo img {
  width: 45px;
  height: 45px;
  border-radius: 8px;
}

.logo-text {
  font-size: 26px;
  font-weight: 700;
}

.menu {
  display: flex;
  list-style: none;
  gap: 30px;
}

.menu a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.3s;
}

.menu a:hover {
  opacity: 0.8;
}

.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 80px 20px;
  text-align: center;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 20px;
  font-weight: 800;
}

.hero p {
  font-size: 20px;
  margin-bottom: 30px;
  opacity: 0.95;
}

.cta-btn {
  background: white;
  color: #667eea;
  padding: 15px 40px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  display: inline-block;
  transition: transform 0.3s;
}

.cta-btn:hover {
  transform: translateY(-3px);
}

.section {
  padding: 80px 20px;
}

.section-title {
  text-align: center;
  font-size: 36px;
  margin-bottom: 50px;
  color: #2c3e50;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.feature {
  background: white;
  padding: 35px;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.08);
  transition: transform 0.3s;
}

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

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

.feature h3 {
  font-size: 22px;
  margin-bottom: 12px;
  color: #667eea;
}

.pairs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.pair-card {
  background: white;
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 3px 10px rgba(0,0,0,0.08);
  text-align: center;
}

.pair-card h4 {
  font-size: 20px;
  color: #667eea;
  margin-bottom: 10px;
}

.pair-card p {
  color: #7f8c8d;
  font-size: 14px;
}

.footer {
  background: #2c3e50;
  color: white;
  padding: 50px 20px 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-col h4 {
  margin-bottom: 15px;
  font-size: 18px;
}

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

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

.footer-col a {
  color: #bdc3c7;
  text-decoration: none;
  transition: color 0.3s;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #34495e;
  color: #95a5a6;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 32px;
  }
  
  .menu {
    flex-direction: column;
    gap: 15px;
  }
}