body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f6f8fb;
  color: #222;
}

header {
  background: linear-gradient(135deg, #2a7ae2, #1d5dbb);
  color: white;
  text-align: center;
  padding: 20px;
}

nav {
  display: flex;
  justify-content: center;
  gap: 20px;
  background: #1d5dbb;
  padding: 12px;
  position: sticky;
  top: 0;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}

nav a:hover {
  opacity: 0.8;
}

.hero {
  text-align: center;
  padding: 70px 20px;
  background: white;
}

.hero h1 {
  font-size: 2.5em;
  color: #2a7ae2;
}

.btn {
  display: inline-block;
  margin-top: 15px;
  background: #25D366;
  color: white;
  padding: 12px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
}

.container {
  max-width: 1100px;
  margin: auto;
  padding: 20px;
}

.card {
  background: white;
  padding: 20px;
  margin: 15px 0;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
}

footer {
  text-align: center;
  padding: 20px;
  background: #2a7ae2;
  color: white;
  margin-top: 40px;
}

/* WhatsApp Button */
.whatsapp {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #25D366;
  color: white;
  padding: 14px 16px;
  border-radius: 50px;
  font-size: 18px;
  text-decoration: none;
  box-shadow: 0 4px 10px rgba(0,0,0,0.3);
}