.fondo-chart-form {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 1.5rem;
  background-color: #f9fafb;
  border: 1px solid #ddd;
  border-radius: 0.75rem;
  padding: 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.fondo-chart-field {
  flex: 1 1 200px;
  display: flex;
  flex-direction: column;
}

.fondo-chart-field label {
  font-weight: 600;
  color: #333;
  margin-bottom: 0.3rem;
}

.fondo-chart-field input,
.fondo-chart-field select {
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1.5rem;
}

.fondo-chart-field input:focus,
.fondo-chart-field select:focus {
  outline: none;
  border-color: #0074bd;
  box-shadow: 0 0 0 2px rgba(0,116,189,0.2);
}

/* 🔹 Mejora responsiva */
@media (max-width: 600px) {
  .fondo-chart-form {
    flex-direction: column;
    gap: 0.5rem; /* antes era 1rem */
    padding: 0.75rem; /* menos padding */
  }

  .fondo-chart-field {
    flex: 1 1 100%;
  }

  .fondo-chart-field label {
    font-size: 10px;
  }

  .fondo-chart-field input,
  .fondo-chart-field select {
    font-size: 10px;
    padding: 0.4rem;
  }
}

@media (max-width: 768px) {
  #fondo-chart-container {
    min-height: 420px;
    height: 620px;
  }
}

@media (max-width: 480px) {
  #fondo-chart-container {
    min-height: 360px;
    height: 460px;
  }
}