body {
  margin:0;
  font-family: 'Segoe UI', sans-serif;
  background:#0f172a;
  color:white;
}

.container {
  width:90%;
  max-width:1100px;
  margin:auto;
}

header {
  background:#020617;
  padding:20px 0;
  text-align:center;
}

.hero {
  padding:60px 0;
}

.hero-grid {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
}

.hero img {
  width:100%;
  border-radius:12px;
}

button {
  padding:12px 20px;
  background:#2563eb;
  border:none;
  color:white;
  border-radius:8px;
  cursor:pointer;
  transition:0.3s;
}

button:hover {
  transform:scale(1.05);
}

.categorias {
  display:flex;
  gap:20px;
  margin:40px auto;
}

.card {
  flex:1;
  background:#1e293b;
  padding:20px;
  text-align:center;
  border-radius:10px;
  transition:0.3s;
}

.card:hover {
  transform:translateY(-8px);
}

.catalogo h2 {
  margin-bottom:20px;
}

.grid {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:20px;
}

.book {
  background:#1e293b;
  padding:15px;
  border-radius:10px;
  transition:0.3s;
}

.book img {
  width:100%;
  border-radius:8px;
  margin-bottom:10px;
}

.book:hover {
  transform:scale(1.05);
}

footer {
  margin-top:40px;
  padding:20px;
  background:#020617;
  text-align:center;
}