body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #fafafa;
  color: #333;
}

header {
  background-color: #222;
  color: white;
  text-align: center;
  padding: 2rem 1rem;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  padding: 2rem;
}

.thumbnail img {
  width: 100%;
  border-radius: 8px;
  transition: transform 0.3s;
}

.thumbnail img:hover {
  transform: scale(1.05);
}

.obra-detalle {
  max-width: 800px;
  margin: 2rem auto;
  text-align: center;
  padding: 1rem;
}

.imagen-grande {
  width: 100%;
  max-width: 600px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
}

.descripcion {
  margin: 1rem 0;
  font-size: 1.1rem;
}

.whatsapp-btn {
  display: inline-block;
  background-color: #25D366;
  color: white;
  padding: 0.6rem 1rem;
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
}

.whatsapp-btn:hover {
  background-color: #1ebe57;
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  background-color: #222;
  color: white;
}