body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f8fb;
  color: #333;
}
header {
  background: #0077b6;
  color: white;
  padding: 15px;
  text-align: center;
  font-size: 1.5em;
}
nav {
  background: #023e8a;
  padding: 10px;
  text-align: center;
}
nav a {
  color: white;
  margin: 0 15px;
  text-decoration: none;
  font-weight: bold;
}
nav a:hover {
  text-decoration: underline;
}
.container {
  padding: 20px;
}
ul {
  list-style: none;
  padding: 0;
}
ul li {
  background: #e7f1fa;
  margin: 8px 0;
  padding: 10px;
  border-radius: 5px;
}
ul li a {
  text-decoration: none;
  color: #0077b6;
  font-weight: bold;
}
ul li a:hover {
  text-decoration: underline;
}
.whatsapp-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #25D366;
  color: white;
  padding: 12px 18px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: bold;
  animation: blink 1s infinite alternate, moveRight 2s infinite;
}
@keyframes blink {
  from {opacity: 1;}
  to {opacity: 0.6;}
}
@keyframes moveRight {
  0% {transform: translateX(0);}
  50% {transform: translateX(10px);}
  100% {transform: translateX(0);}
}