body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}
header {
  background-color: #333;
  color: white;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header .logo {
  height: 60px;
}
nav a {
  margin: 0 10px;
  color: white;
  text-decoration: none;
}
main {
  padding: 2rem;
  text-align: center;
}
main img.imagen-principal {
  max-width: 100%;
  height: auto;
  margin: 20px 0;
}
.whatsapp {
  display: inline-block;
  padding: 10px 20px;
  background-color: #25D366;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}
footer {
  background-color: #eee;
  padding: 1rem;
  text-align: center;
}
input#buscador {
  padding: 10px;
  width: 80%;
  max-width: 400px;
  margin-bottom: 20px;
}
ul#lista-productos {
  list-style: none;
  padding: 0;
}
ul#lista-productos li {
  padding: 10px;
  border-bottom: 1px solid #ccc;
}