.cootecu-calculadora {
  --verde: #0f7d39;
  --verde-oscuro: #075024;
  --azul: #004b87;
  --azul-claro: #1e6fb7;
  --blanco: #ffffff;
  --gris: #f5f7fa;
  --gris-medio: #d9e2ec;
  --gris-oscuro: #3a4a5a;
  --danger: #d62828;
  --shadow: 0 4px 12px rgba(0,0,0,0.12);
  --radius: 12px;
  --transition: 0.25s ease;
  --font-stack: 'Segoe UI', Roboto, Arial, sans-serif;

  font-family: var(--font-stack);
  color: var(--gris-oscuro);
}

/* Header */
.cootecu-calculadora .app-header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}
.cootecu-calculadora .app-header h1 {
  margin: 0 0 .5rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--azul);
}
.cootecu-calculadora .app-header p {
  margin: 0;
  opacity: .85;
}

/* Layout */
.cootecu-calculadora .container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto 2rem;
  padding: 0 1rem;
}

/* Card */
.cootecu-calculadora .card {
  background: var(--blanco);
  border-radius: var(--radius);
  padding: 1.8rem 1.6rem 2.4rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.cootecu-calculadora .card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(125deg, rgba(15,125,57,0.08), rgba(0,75,135,0.08));
  pointer-events: none;
}

/* Form */
.cootecu-calculadora .form-grid {
  display: grid;
  gap: 1.25rem 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-bottom: 1.25rem;
}
.cootecu-calculadora .form-group {
  display: flex;
  flex-direction: column;
}
.cootecu-calculadora .form-group label {
  font-weight: 600;
  color: var(--azul);
  margin-bottom: .35rem;
}
.cootecu-calculadora .form-group input {
  padding: .65rem .75rem;
  border: 2px solid var(--gris-medio);
  border-radius: 8px;
  font-size: .95rem;
  background: var(--gris);
  transition: var(--transition);
}
.cootecu-calculadora .form-group input:focus {
  outline: none;
  border-color: var(--azul-claro);
  background: var(--blanco);
  box-shadow: 0 0 0 3px rgba(30,111,183,0.2);
}

.cootecu-calculadora .hint {
  font-size: .7rem;
  opacity: .7;
  margin-top: .3rem;
}
.cootecu-calculadora .error {
  color: var(--danger);
  font-size: .7rem;
  min-height: .8rem;
}

/* Segmented radios */
.cootecu-calculadora .segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem;
}
.cootecu-calculadora .segmented input {
  position: absolute;
  opacity: 0;
}
.cootecu-calculadora .segmented label {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: .65rem;
  border: 2px solid var(--gris-medio);
  border-radius: 10px;
  background: var(--gris);
  color: var(--azul);
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}
.cootecu-calculadora .segmented input:checked + label {
  background: var(--azul);
  color: var(--blanco);
  border-color: var(--azul);
}

/* Buttons */
.cootecu-calculadora .actions {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin-top: .5rem;
}
.cootecu-calculadora .btn {
  cursor: pointer;
  border: none;
  padding: .75rem 1.25rem;
  font-size: .9rem;
  font-weight: 600;
  border-radius: 30px;
  transition: var(--transition);
}
.cootecu-calculadora .btn.primary {
  background: var(--verde);
  color: var(--blanco);
}
.cootecu-calculadora .btn.primary:hover {
  background: var(--verde-oscuro);
}
.cootecu-calculadora .btn.secondary {
  background: var(--azul);
  color: var(--blanco);
}
.cootecu-calculadora .btn.secondary:disabled {
  background: var(--gris-medio);
  cursor: not-allowed;
}
.cootecu-calculadora .btn.danger {
  background: var(--danger);
  color: var(--blanco);
}
.cootecu-calculadora .btn.outline {
  background: transparent;
  border: 2px solid var(--azul);
  color: var(--azul);
}

/* Results */
.cootecu-calculadora .results {
  margin-top: 2rem;
}
.cootecu-calculadora .results h2 {
  color: var(--verde);
}
.cootecu-calculadora .result-grid {
  display: grid;
  gap: .9rem;
  grid-template-columns: repeat(auto-fit,minmax(220px,1fr));
}
.cootecu-calculadora .result-item {
  background: var(--gris);
  padding: .9rem;
  border-radius: 10px;
}

/* Modal */
.cootecu-calculadora .modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 6vh 1rem;
  background: rgba(0,0,0,.6);
  z-index: 9999;
}
.cootecu-calculadora .modal.show {
  display: flex;
}
.cootecu-calculadora .modal-content {
  background: var(--blanco);
  width: min(100%, 980px);
  max-height: 80vh;
  border-radius: var(--radius);
  overflow: hidden;
}

/* Footer */
.cootecu-calculadora .app-footer {
  text-align: center;
  padding: 1.2rem;
  font-size: .75rem;
}

/* Mobile */
@media (max-width: 600px) {
  .cootecu-calculadora .actions {
    flex-direction: column;
  }
  .cootecu-calculadora .btn {
    width: 100%;
  }
}