:root {
  --azul: #1a3fa0;
  --azul-oscuro: #0f2560;
  --negro: #111318;
  --gris: #6b7280;
  --gris-claro: #f3f4f6;
  --borde: #e5e7eb;
  --blanco: #ffffff;
  --rojo: #dc2626;
  --verde: #16a34a;
  --radio: 12px;
  --sombra: 0 4px 18px rgba(17, 19, 24, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--gris-claro);
  color: var(--negro);
  -webkit-font-smoothing: antialiased;
}

.contenedor {
  max-width: 520px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.marca {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 0 8px;
}

.marca__nombre {
  font-weight: 800;
  font-size: 20px;
  color: var(--azul-oscuro);
}

.pasos {
  display: flex;
  gap: 6px;
  margin: 8px 0 28px;
}

.pasos__item {
  flex: 1;
  height: 4px;
  border-radius: 4px;
  background: var(--borde);
  transition: background 0.3s ease;
}

.pasos__item.activo,
.pasos__item.completo {
  background: var(--azul);
}

.tarjeta {
  background: var(--blanco);
  border-radius: var(--radio);
  box-shadow: var(--sombra);
  padding: 24px 20px;
}

.paso {
  animation: aparecer 0.35s ease;
}

.paso[hidden] { display: none !important; }

@keyframes aparecer {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

h1 {
  font-size: 22px;
  margin: 0 0 6px;
  color: var(--negro);
}

h2 {
  font-size: 18px;
  margin: 0 0 4px;
}

.subtitulo {
  color: var(--gris);
  font-size: 14px;
  margin: 0 0 20px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin: 16px 0 6px;
  color: var(--negro);
}

label:first-child { margin-top: 0; }

input[type="text"],
input[type="tel"],
input[type="url"],
input[type="file"],
select,
textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--borde);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  background: var(--blanco);
  color: var(--negro);
}

textarea { min-height: 90px; resize: vertical; }

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--azul);
  box-shadow: 0 0 0 3px rgba(26, 63, 160, 0.15);
}

.fila-doble {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

@media (min-width: 420px) {
  .fila-doble {
    grid-template-columns: 90px 1fr;
    gap: 10px;
  }
}

.error-campo {
  color: var(--rojo);
  font-size: 13px;
  margin-top: 6px;
  display: none;
}

.error-campo.visible { display: block; }

.btn {
  display: block;
  width: 100%;
  padding: 14px 18px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  transition: transform 0.08s ease, opacity 0.15s ease;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-primario {
  background: var(--azul);
  color: var(--blanco);
  margin-top: 24px;
}

.btn-secundario {
  background: var(--gris-claro);
  color: var(--negro);
  margin-top: 10px;
}

.btn-whatsapp {
  background: #22c55e;
  color: var(--blanco);
  margin-top: 24px;
}

.planes {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.plan {
  border: 2px solid var(--borde);
  border-radius: var(--radio);
  padding: 18px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.plan.seleccionado {
  border-color: var(--azul);
  background: rgba(26, 63, 160, 0.04);
}

.plan__nombre {
  font-weight: 800;
  font-size: 17px;
}

.plan__precio {
  color: var(--azul);
  font-weight: 700;
  font-size: 15px;
  margin: 4px 0 10px;
}

.plan__beneficios {
  margin: 0;
  padding-left: 18px;
  font-size: 13.5px;
  color: var(--gris);
  line-height: 1.6;
}

.resumen-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--borde);
  font-size: 14px;
}

.resumen-item:last-child { border-bottom: none; }
.resumen-item__label { color: var(--gris); }
.resumen-item__valor { font-weight: 600; text-align: right; }

.logo-preview {
  margin-top: 10px;
  max-width: 120px;
  max-height: 120px;
  border-radius: 8px;
  border: 1px solid var(--borde);
  display: none;
}

.logo-preview.visible { display: block; }

.centro {
  text-align: center;
  padding: 20px 0;
}

.icono-exito {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(22, 163, 74, 0.12);
  color: var(--verde);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin: 0 auto 16px;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--borde);
  border-top-color: var(--azul);
  border-radius: 50%;
  animation: girar 0.7s linear infinite;
  margin: 0 auto;
}

@keyframes girar { to { transform: rotate(360deg); } }

.mensaje-error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--rojo);
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px;
  margin-top: 16px;
  display: none;
}

.mensaje-error.visible { display: block; }