body {
  font-family: Arial, sans-serif;
  text-align: center;
  background: #fff;
  margin: 0; padding: 0;
}
header {
  background: #002855;
  color: #fff;
  padding: 15px;
}
header .logo {
  max-height: 60px;
}
nav a {
  color: #ff0;
  margin: 0 8px;
  text-decoration: none;
}
.slider {
  display: flex;
  overflow-x: auto;
  gap: 20px;
  padding: 20px;
}
.slider .slide img {
  height: 180px;
  border: 3px solid #333;
  animation: fade 2s infinite alternate;
}
@keyframes fade {
  from { opacity: 0.5; }
  to { opacity: 1; }
}
.frame-preview {
  position: relative;
  display: inline-block;
}
.frame-preview .frame-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
}
.whatsapp-btn {
  background: #25D366;
  color: #fff;
  padding: 12px 18px;
  text-decoration: none;
  border-radius: 6px;
  display: inline-block;
  margin-top: 20px;
}