/* 🔄 Reset básico */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 🌐 Tipografía y cuerpo */
body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #fff;
  color: #333;
  line-height: 1.6;
}

/* 🔥 Cintillo superior */
.banner {
  display: block;
  width: 100%;
  background-color: #ff4081;
  color: #fff;
  text-align: center;
  font-weight: bold;
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #e91e63;
  z-index: 10;
}

/* 🧭 Encabezado con logo */
header {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem 2rem;
  background-color: #f5f5f5;
  border-bottom: 1px solid #ddd;
}

header img {
  height: 48px;
}

/* 📦 Contenido principal */
main {
  display: flex;
  flex-direction: column;
  padding: 2rem;
  gap: 2rem;
}

/* 🖼️ Galería de imágenes */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 0 4px rgba(0,0,0,0.1);
}

figcaption {
  font-size: 0.85rem;
  color: #666;
  text-align: center;
  margin-top: 0.5rem;
}

/* 📝 Información del producto */
article {
  background-color: #fafafa;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 0 8px rgba(0,0,0,0.05);
}

article h1 {
  font-size: 2rem;
  color: #d81b60;
}

.price {
  font-size: 2.2rem;
  font-weight: bold;
  color: #333;
  margin: 1rem 0;
}

article ul {
  padding-left: 1rem;
  list-style-type: disc;
}

article li {
  margin-bottom: 0.5rem;
}

/* 🛒 Botón de compra */
.buy-button {
  display: block;
  background-color: #25D366;
  color: