body {
  font-family: 'Roboto', sans-serif;
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.6;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
header {
  background: linear-gradient(to right, #27ae60, #2980b9);
  padding: 10px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 25px;
}
.nav-links li a {
  color: white;
  font-weight: bold;
  text-decoration: none;
}
.hero-section {
  background: url('https://images.unsplash.com/photo-1519389950473-47ba0277781c?auto=format&fit=crop&w=1400&q=80') no-repeat center center/cover;
  height: 90vh;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  position: relative;
}
.hero-overlay {
  background: rgba(0,0,0,0.6);
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.btn-banner {
  background: #2980b9;
  color: white;
  padding: 12px 24px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: bold;
}
.service-card {
  background: white;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
  margin: 10px;
  flex: 1 1 30%;
  transition: 0.3s;
}
.service-card:hover {
  transform: translateY(-5px);
}