:root {
  /* Verdes extraídos del logo Futurum */
  --verde-principal: #96EE43;      /* verde medio de la flecha */
  --verde-oscuro: #2DDE33;         /* verde más intenso (parte baja) */
  --verde-suave: #F5FFE3;          /* verde muy claro para fondos suaves */

  /* Azul exacto del texto FUTURUM */
  --azul-oscuro: #0D203F;

  --gris-claro: #f5f7fa;
  --gris-texto: #4a4a4a;
  --blanco: #ffffff;
}

/* RESET BÁSICO */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  color: var(--gris-texto);
  background-color: var(--gris-claro);
  line-height: 1.6;
}

img {
  max-width: 100%;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

/* LAYOUT GENERAL */

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
}

/* HEADER */

.main-header {
  background-color: var(--blanco);
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  gap: 16px;
}

.logo img {
  height: 40px;
}

.main-nav {
  display: flex;
  gap: 16px;
  font-size: 0.95rem;
}

.main-nav a {
  color: var(--azul-oscuro);
  font-weight: 500;
}

.main-nav a:hover {
  color: var(--verde-principal);
}

.btn-acceso {
  font-size: 0.9rem;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--verde-principal);
  color: var(--verde-principal);
  background-color: #ecfffa;
  font-weight: 600;
  white-space: nowrap;
}

.btn-acceso:hover {
  background-color: var(--verde-principal);
  color: var(--blanco);
}

/* HERO */

.hero {
  background: linear-gradient(135deg, var(--verde-suave), #ffffff);
  padding: 32px 0 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.hero-kicker {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--verde-oscuro);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.hero-title {
  font-size: clamp(1.9rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--azul-oscuro);
  margin-bottom: 12px;
}

.hero-subtitle {
  font-size: 1rem;
  margin-bottom: 18px;
  max-width: 520px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.badge {
  font-size: 0.8rem;
  padding: 6px 10px;
  border-radius: 999px;
  background-color: #e8f9f4;
  color: var(--azul-oscuro);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.badge span {
  font-size: 0.9rem;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 10px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--verde-principal), var(--verde-oscuro));
  color: var(--blanco);
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 8px 20px rgba(0, 184, 148, 0.35);
}

.btn-primary:hover {
  opacity: 0.95;
}

.btn-secondary {
  background-color: var(--blanco);
  color: var(--azul-oscuro);
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid #cbd5e1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary:hover {
  border-color: var(--verde-principal);
  color: var(--verde-principal);
}

.hero-note {
  font-size: 0.78rem;
  color: #6b7280;
  margin-top: 8px;
}

.hero-image {
  position: relative;
}

.hero-image-main {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.hero-image-main img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.hero-floating-card {
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--blanco);
  border-radius: 18px;
  padding: 10px 14px;
  box-shadow: 0 12px 25px rgba(15, 23, 42, 0.18);
  font-size: 0.78rem;
  display: flex;
  gap: 10px;
  align-items: center;
}

.hero-floating-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background-color: var(--verde-principal);
  box-shadow: 0 0 0 6px rgba(0, 184, 148, 0.2);
}

/* SECCIONES GENERALES */

section {
  padding: 40px 0;
}

h2.section-title {
  font-size: 1.5rem;
  color: var(--azul-oscuro);
  margin-bottom: 10px;
  text-align: center;
}

.section-title-left {
  text-align: left;
}

.section-intro {
  font-size: 0.95rem;
  max-width: 640px;
  margin: 0 auto 26px;
  text-align: center;
  color: #6b7280;
}

.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background-color: var(--blanco);
  border-radius: 18px;
  padding: 18px 16px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.06);
  border: 1px solid #e5e7eb;
}

.card h3 {
  font-size: 1rem;
  color: var(--azul-oscuro);
  margin-bottom: 6px;
}

.card p {
  font-size: 0.9rem;
}

.card-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--verde-oscuro);
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.card-highlight {
  font-size: 0.85rem;
  margin-bottom: 8px;
  color: #6b7280;
}

/* Imagen en Cómo Funciona */

.how-image-wrapper {
  max-width: 900px;
  margin: 0 auto 24px;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
}

/* MATERIAS */

.subjects-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.subjects-grid ul {
  list-style: none;
  padding-left: 0;
  font-size: 0.9rem;
}

.subjects-grid li::before {
  content: "•";
  color: var(--verde-principal);
  font-weight: 900;
  margin-right: 6px;
}

/* PLANES */

.plans-wrapper {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.plan-card {
  background-color: var(--blanco);
  border-radius: 18px;
  padding: 18px 16px 20px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
  border: 1px solid #e2e8f0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.plan-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.plan-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--azul-oscuro);
}

.plan-price {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--verde-oscuro);
}

.plan-price span {
  font-size: 0.8rem;
  font-weight: 500;
  color: #6b7280;
  display: block;
}

.plan-desc {
  font-size: 0.88rem;
  color: #4b5563;
}

.plan-list {
  font-size: 0.85rem;
  list-style: none;
  margin: 4px 0 4px;
  padding-left: 0;
}

.plan-list li {
  margin-bottom: 4px;
}

.plan-list li::before {
  content: "✓";
  color: var(--verde-principal);
  font-weight: 900;
  margin-right: 6px;
}

.plan-buttons {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 6px;
}

.btn-plan-pay {
  background: linear-gradient(135deg, var(--verde-principal), var(--verde-oscuro));
  color: var(--blanco);
  padding: 8px 10px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 700;
  text-align: center;
}

.btn-plan-whatsapp {
  background-color: #eff6ff;
  color: var(--azul-oscuro);
  padding: 7px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  text-align: center;
}

.btn-plan-whatsapp:hover {
  background-color: #e0f2fe;
}

.plans-footnote {
  font-size: 0.8rem;
  margin-top: 10px;
  text-align: center;
  color: #6b7280;
}

/* BENEFICIOS */

.benefits-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

.benefits-list {
  list-style: none;
  padding-left: 0;
  font-size: 0.9rem;
}

.benefits-list li {
  margin-bottom: 8px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.benefits-icon {
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background-color: var(--verde-principal);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--blanco);
  flex-shrink: 0;
  margin-top: 2px;
}

.benefits-image {
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.1);
}

/* TESTIMONIOS */

.testimonials {
  background-color: var(--blanco);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.testimonial {
  border-radius: 18px;
  border: 1px solid #e5e7eb;
  padding: 16px 16px 14px;
  background: linear-gradient(135deg, #f9fafb, #ffffff);
}

.testimonial-text {
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.testimonial-author {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--azul-oscuro);
}

/* FAQ */

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.faq-item {
  background-color: var(--blanco);
  border-radius: 16px;
  padding: 12px 14px;
  border: 1px solid #e5e7eb;
}

.faq-item h3 {
  font-size: 0.95rem;
  margin-bottom: 4px;
  color: var(--azul-oscuro);
}

.faq-item p {
  font-size: 0.85rem;
  color: #4b5563;
}

/* CTA FINAL */

.cta-final {
  background: radial-gradient(circle at top left, #cafff1, #eef2ff);
  text-align: center;
  padding: 34px 0 40px;
}

.cta-final p {
  font-size: 0.95rem;
  max-width: 620px;
  margin: 0 auto 16px;
  color: #374151;
}

.cta-btn-wrapper {
  margin-top: 16px;
}

.cta-note {
  font-size: 0.8rem;
  color: #6b7280;
  margin-top: 8px;
}

/* FOOTER */

footer {
  font-size: 0.78rem;
  padding: 16px 0 12px;
  color: #9ca3af;
  background-color: #0f172a;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  color: #e5e7eb;
}

.footer-right {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 0.8rem;
}

.footer-right a {
  color: #a5b4fc;
}

.footer-right a:hover {
  color: #c4b5fd;
}

/* WHATSAPP FLOAT */

.whatsapp-float {
  position: fixed;
  right: 16px;
  bottom: 16px;
  width: 54px;
  height: 54px;
  border-radius: 999px;
  background: linear-gradient(135deg, #25d366, #128c7e);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blanco);
  font-size: 1.6rem;
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.2);
  z-index: 60;
}

.whatsapp-float span {
  transform: translateY(1px);
}

/* CLASE PARA VIBRACIÓN / PULSO SUAVE */

.whatsapp-float--pulse {
  animation: whatsappPulse 0.9s ease-in-out;
}

@keyframes whatsappPulse {
  0% {
    transform: translate(0, 0);
  }
  20% {
    transform: translate(-2px, 0);
  }
  40% {
    transform: translate(2px, 0);
  }
  60% {
    transform: translate(-2px, 0);
  }
  80% {
    transform: translate(2px, 0);
  }
  100% {
    transform: translate(0, 0);
  }
}

/* RESPONSIVE */

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-image {
    order: -1;
  }

  .header-content {
    flex-wrap: wrap;
  }

  .main-nav {
    display: none; /* Menú simplificado en móvil */
  }

  .btn-acceso {
    margin-left: auto;
  }

  .cards-3,
  .plans-wrapper,
  .subjects-grid,
  .benefits-grid,
  .testimonials-grid,
  .faq-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 600px) {
  .hero {
    padding-top: 22px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn-primary,
  .btn-secondary {
    justify-content: center;
    width: 100%;
  }

  section {
    padding: 30px 0;
  }

  .hero-floating-card {
    display: none;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .whatsapp-float {
    right: 12px;
    bottom: 12px;
  }
}