* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Quicksand', sans-serif;
  background: #f5f5f5;
  color: #333;
}

/* NAVBAR */
header {
  background: linear-gradient(90deg, #ff9800, #ff5722);
  padding: 10px 20px;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: white;
  font-weight: 700;
}

.logo img {
  height: 40px;
}

.menu {
  list-style: none;
  display: flex;
  gap: 20px;
  padding: 0;
}

.menu a {
  color: white;
  text-decoration: none;
  font-weight: 600;
}

/* HERO */
.hero {
  background: linear-gradient(
      rgba(0,0,0,0.5),
      rgba(0,0,0,0.5)
    ),
    url("img/portada.jpg");
  background-size: cover;
  background-position: center;
  color: white;
  text-align: center;
  padding: 100px 20px;
}

/* ALERTA */
.alerta {
  background: #e53935;
  color: white;
  text-align: center;
  padding: 15px;
  font-size: 1.1em;
}

/* SECCIONES */
section {
  padding: 60px 20px;
  text-align: center;
}

/* GALERÍA */
.galeria {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.galeria img {
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

/* BOTÓN */
.btn-descarga {
  display: inline-block;
  margin-top: 20px;
  padding: 15px 30px;
  background: linear-gradient(90deg, #ff9800, #ff5722);
  color: white;
  text-decoration: none;
  font-weight: 700;
  border-radius: 30px;
}

/* FOOTER */
footer {
  background: #222;
  color: white;
  text-align: center;
  padding: 20px;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .menu {
    flex-direction: column;
    width: 100%;
    margin-top: 10px;
  }

  .hero {
    padding: 70px 15px;
  }

}
.oculto {
  display: none;
}