body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f3f4f6;
  color: #111827;
}
nav ul {
  display: flex;
  list-style: none;
  padding: 0;
  justify-content: center;
  margin: 0;
  background-color: rgba(0, 0, 0, 0.5);
}
nav ul li {
  margin: 0 15px;
}
nav ul li a {
  text-decoration: none;
  color: white;
  font-weight: bold;
  transition: color 0.3s ease;
}
nav ul li a:hover {
  color: #f59e0b;
}
nav ul li a.active {
  border-bottom: 2px solid #f59e0b;
}
.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('5f48878be5dbdd10cdf01912ab37fa33.jpg') no-repeat center center/cover;
  color: white;
  padding: 80px 20px;
  text-align: center;
}
.intro {
  padding: 40px 20px;
  text-align: center;
}
footer {
  background: #1f2937;
  color: white;
  padding: 15px;
  text-align: center;
}
.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: #25D366;
  color: white;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  z-index: 99999;
}