html, body {
  height: 100%;
  margin: 0;
}

.bg-cover {
  background-size: cover;
  background-position: center;
  transition: background-image 1s ease-in-out;
}

/* Estilo glassmorphism */
.bg-glass {
  background: rgba(255, 255, 255, 0.5);
  border-radius: 1rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

/* Sombras suaves */
.shadow-lg {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.shadow-lg:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  transform: translateY(-5px);
}

/* Botón animado */
.btn-success {
  background-color: #28a745;
  border: none;
  transition: background-color 0.3s ease;
}

.btn-success:hover {
  background-color: #218838;
}

.input-group-text {
  background-color: #e9ecef;
  border: none;
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}