/* ==========================================================================
   firmas.css — sección de firmas electrónicas (precios por plazo)
   ========================================================================== */

#firmas {
  scroll-margin-top: 90px;
}

.firmas {
  padding: 72px 0;
  background: var(--color-bg);
  color: var(--color-ink);
}

.firmas__eyebrow {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-red);
}

.firmas__title {
  margin: 0.5rem 0 0.6rem;
  font-size: clamp(1.9rem, 3.6vw, 2.8rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.firmas__lead {
  margin: 0;
  max-width: 60ch;
  color: var(--color-gray);
}

.firmas__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.firma-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 32px 22px 26px;
  text-align: center;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.firma-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-red);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.12);
}

.firma-card__icono {
  font-size: 2.6rem;
  line-height: 1;
}

.firma-card__plazo {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray);
}

.firma-card__precio {
  margin: 0;
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1;
  color: var(--color-red);
}

.firma-card__nota {
  margin: 0 0 8px;
  font-size: 0.88rem;
  color: var(--color-gray);
}

.firma-card .btn {
  margin-top: auto;
  width: 100%;
  justify-content: center;
  text-align: center;
}

.firmas__pie {
  margin: 24px 0 0;
  font-size: 0.85rem;
  color: var(--color-gray);
}

@media (max-width: 760px) {
  .firmas__grid {
    grid-template-columns: 1fr;
  }
}