:root {
  --color-principal: var(--principal);
  --radius: 8px;
  --shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.calculadora {
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: 1rem;
  padding: 1rem 0;
}

@media (max-width: 768px) {
  .calculadora {
    grid-template-columns: 1fr;
  }
  .resumen {
    position: static;
  }
}

.configuracion,
.resumen {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.configuracion label,
.configuracion select,
.configuracion input {
  display: block;
  width: 100%;
  margin-bottom: 0.5rem;
}

#catalog {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
}

.charms-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.5rem;
  text-align: center;
}

.charms-card__image {
  width: 100%;
  border-radius: var(--radius);
}

.charms-card__title {
  margin-top: 0.5rem;
  font-weight: 600;
}

.charms-card__input {
  margin-top: 0.5rem;
  width: 60px;
  border-radius: var(--radius);
  border: 1px solid #ccc;
  padding: 0.25rem;
  text-align: center;
}

.resumen ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
}

.buttons {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.buttons button {
  border: none;
  border-radius: var(--radius);
  padding: 0.5rem;
  cursor: pointer;
  background: var(--color-principal);
  color: #fff;
  box-shadow: var(--shadow);
}

.buttons button.whatsapp {
  background: var(--green);
}

.color-preview {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid #ccc;
  display: inline-block;
}