:root {
  --color-primario: #1a365d;
  --color-primario-hover: #0f2442;
  --color-secundario: #c59b27;
  --color-secundario-hover: #a6801b;
  --color-fondo: #f8fafc;
  --color-superficie: #ffffff;
  --color-texto: #1e293b;
  --color-texto-mutado: #64748b;
  --color-borde: #e2e8f0;
  --color-acento-suave: #eef4ff;
  --color-exito: #15803d;
  --color-error: #b91c1c;

  --fuente-principal: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  
  --radio-sm: 6px;
  --radio-md: 10px;
  --radio-lg: 16px;
  --radio-full: 9999px;

  --sombra-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --sombra-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --sombra-lg: 0 10px 25px rgba(15, 23, 42, 0.12);

  --transicion: 0.25s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--fuente-principal);
  font-size: 16px;
  color: var(--color-texto);
  background-color: var(--color-fondo);
  scroll-behavior: smooth;
  line-height: 1.6;
}

body {
  overflow-x: hidden;
  width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transicion);
}

ul {
  list-style: none;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* =========================================
   HEADER & NAVEGACIÓN (Mobile First)
   ========================================= */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-superficie);
  border-bottom: 1px solid var(--color-borde);
  box-shadow: var(--sombra-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-escudo {
  width: 40px;
  height: 40px;
  border-radius: var(--radio-md);
  background-color: var(--color-primario);
  color: var(--color-secundario);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.5px;
}

.logo-texto {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo-texto strong {
  font-size: 1.05rem;
  color: var(--color-primario);
}

.logo-texto small {
  font-size: 0.75rem;
  color: var(--color-texto-mutado);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.nav-toggle {
  background: none;
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-sm);
  padding: 0.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
}

.nav-icon {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-primario);
  position: relative;
  transition: background-color var(--transicion);
}

.nav-icon::before,
.nav-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primario);
  transition: transform var(--transicion), top var(--transicion);
}

.nav-icon::before { top: -6px; }
.nav-icon::after { top: 6px; }

.nav-toggle.activo .nav-icon {
  background-color: transparent;
}

.nav-toggle.activo .nav-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle.activo .nav-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav {
  position: fixed;
  top: 65px;
  left: 0;
  right: 0;
  background-color: var(--color-superficie);
  border-bottom: 1px solid var(--color-borde);
  padding: 1.5rem;
  box-shadow: var(--sombra-lg);
  transform: translateY(-120%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transicion), opacity var(--transicion);
}

.nav.activo {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nav-link {
  display: block;
  font-weight: 500;
  padding: 0.5rem 0;
  color: var(--color-texto);
}

.nav-link:hover {
  color: var(--color-primario);
}

.nav-cta {
  display: inline-block;
  text-align: center;
  padding: 0.75rem 1.25rem;
  background-color: var(--color-primario);
  color: var(--color-superficie);
  border-radius: var(--radio-md);
  font-weight: 600;
  margin-top: 0.5rem;
}

/* =========================================
   BOTONES Y COMPONENTES BASE
   ========================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radio-md);
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transicion);
  text-align: center;
}

.btn-primary {
  background-color: var(--color-primario);
  color: var(--color-superficie);
}

.btn-primary:hover {
  background-color: var(--color-primario-hover);
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-primario);
  color: var(--color-primario);
}

.btn-secondary:hover {
  background-color: var(--color-acento-suave);
}

.btn-block {
  width: 100%;
}

/* =========================================
   HERO SECTION
   ========================================= */
.hero {
  padding: 3rem 1.25rem 3.5rem;
  background: linear-gradient(180deg, var(--color-acento-suave) 0%, var(--color-fondo) 100%);
  border-bottom: 1px solid var(--color-borde);
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.hero-tag {
  display: inline-block;
  background-color: var(--color-superficie);
  color: var(--color-primario);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-full);
  padding: 0.35rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2rem;
  line-height: 1.2;
  color: var(--color-primario);
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--color-texto-mutado);
  max-width: 720px;
  margin: 0 auto 1.75rem;
}

.hero-acciones {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 380px;
  margin: 0 auto 2.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  background-color: var(--color-superficie);
  padding: 1.5rem;
  border-radius: var(--radio-lg);
  border: 1px solid var(--color-borde);
  box-shadow: var(--sombra-md);
  max-width: 800px;
  margin: 0 auto;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-numero {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--color-secundario);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-texto-mutado);
  font-weight: 500;
}

/* =========================================
   SECCIONES GENERALES
   ========================================= */
.section {
  padding: 3.5rem 1.25rem;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 2.5rem;
}

.section-badge {
  display: inline-block;
  color: var(--color-secundario);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 1.75rem;
  color: var(--color-primario);
  line-height: 1.25;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  color: var(--color-texto-mutado);
  font-size: 0.95rem;
}

/* =========================================
   CARDS DE PROPUESTA INSTITUCIONAL
   ========================================= */
.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.card {
  background-color: var(--color-superficie);
  padding: 1.75rem;
  border-radius: var(--radio-lg);
  border: 1px solid var(--color-borde);
  box-shadow: var(--sombra-sm);
  transition: transform var(--transicion), box-shadow var(--transicion);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sombra-md);
}

.card-icono {
  width: 48px;
  height: 48px;
  border-radius: var(--radio-md);
  background-color: var(--color-acento-suave);
  color: var(--color-primario);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.card-icono svg {
  width: 26px;
  height: 26px;
}

.card-title {
  font-size: 1.2rem;
  color: var(--color-primario);
  margin-bottom: 0.65rem;
}

.card-text {
  color: var(--color-texto-mutado);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* =========================================
   NIVELES EDUCATIVOS
   ========================================= */
.niveles {
  background-color: var(--color-superficie);
}

.niveles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.nivel-card {
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-lg);
  padding: 1.75rem;
  background-color: var(--color-fondo);
  display: flex;
  flex-direction: column;
}

.nivel-card.destacado {
  border-color: var(--color-secundario);
  background-color: var(--color-superficie);
  box-shadow: var(--sombra-md);
  position: relative;
}

.nivel-badge {
  display: inline-block;
  background-color: var(--color-acento-suave);
  color: var(--color-primario);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radio-full);
  margin-bottom: 0.5rem;
}

.nivel-nombre {
  font-size: 1.35rem;
  color: var(--color-primario);
  margin-bottom: 0.75rem;
}

.nivel-desc {
  color: var(--color-texto-mutado);
  font-size: 0.95rem;
  margin-bottom: 1.25rem;
}

.nivel-items {
  margin-top: auto;
  border-top: 1px solid var(--color-borde);
  padding-top: 1rem;
}

.nivel-items li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--color-texto);
  margin-bottom: 0.5rem;
}

.nivel-items li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-secundario);
  font-weight: 800;
}

/* =========================================
   INSCRIPCIONES Y FORMULARIO
   ========================================= */
.inscripciones {
  background-color: var(--color-fondo);
}

.inscripcion-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.inscripcion-texto {
  color: var(--color-texto-mutado);
  margin-bottom: 1.75rem;
}

.pasos-admision {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.paso {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.paso-num {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 50%;
  background-color: var(--color-primario);
  color: var(--color-superficie);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.paso h4 {
  font-size: 1rem;
  color: var(--color-primario);
  margin-bottom: 0.25rem;
}

.paso p {
  font-size: 0.85rem;
  color: var(--color-texto-mutado);
}

.inscripcion-form-wrapper {
  background-color: var(--color-superficie);
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-lg);
  padding: 1.5rem;
  box-shadow: var(--sombra-md);
}

.form-title {
  font-size: 1.25rem;
  color: var(--color-primario);
  margin-bottom: 1.25rem;
}

.form-group {
  margin-bottom: 1.15rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-texto);
  margin-bottom: 0.4rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-md);
  background-color: var(--color-superficie);
  color: var(--color-texto);
  outline: none;
  transition: border-color var(--transicion), box-shadow var(--transicion);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primario);
  box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.15);
}

.form-textarea {
  resize: vertical;
}

.form-error {
  display: none;
  color: var(--color-error);
  font-size: 0.75rem;
  margin-top: 0.35rem;
}

.form-group.invalido .form-input,
.form-group.invalido .form-select {
  border-color: var(--color-error);
}

.form-group.invalido .form-error {
  display: block;
}

.form-feedback {
  margin-top: 1rem;
  padding: 0.85rem;
  border-radius: var(--radio-md);
  font-size: 0.9rem;
  display: none;
}

.form-feedback.exito {
  display: block;
  background-color: #dcfce7;
  color: var(--color-exito);
  border: 1px solid #bbf7d0;
}

/* =========================================
   CANALES FAMILIAS & FAQ
   ========================================= */
.canal-card {
  display: flex;
  flex-direction: column;
}

.canal-tag {
  margin-top: auto;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-secundario);
  text-transform: uppercase;
  padding-top: 1rem;
}

.faq-container {
  margin-top: 3.5rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.faq-title {
  text-align: center;
  font-size: 1.35rem;
  color: var(--color-primario);
  margin-bottom: 1.5rem;
}

.faq-item {
  border: 1px solid var(--color-borde);
  border-radius: var(--radio-md);
  margin-bottom: 0.75rem;
  background-color: var(--color-superficie);
  overflow: hidden;
}

.faq-pregunta {
  width: 100%;
  padding: 1.1rem 1.25rem;
  background: none;
  border: none;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primario);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.faq-flecha {
  font-size: 1.25rem;
  font-weight: 700;
  transition: transform var(--transicion);
  flex-shrink: 0;
}

.faq-item.abierto .faq-flecha {
  transform: rotate(45deg);
}

.faq-respuesta {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transicion);
  padding: 0 1.25rem;
}

.faq-item.abierto .faq-respuesta {
  padding-bottom: 1.1rem;
}

.faq-respuesta p {
  color: var(--color-texto-mutado);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* =========================================
   SECCIÓN CONTACTO & FOOTER
   ========================================= */
.contacto {
  background-color: var(--color-superficie);
  border-top: 1px solid var(--color-borde);
}

.contacto-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.contacto-card {
  padding: 1.5rem;
  background-color: var(--color-fondo);
  border-radius: var(--radio-lg);
  border: 1px solid var(--color-borde);
}

.contacto-card h3 {
  font-size: 1.2rem;
  color: var(--color-primario);
  margin-bottom: 0.5rem;
}

.contacto-card p {
  font-size: 0.9rem;
  color: var(--color-texto-mutado);
  margin-bottom: 0.75rem;
}

.contacto-dato {
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
  color: var(--color-texto);
}

.contacto-aclaracion {
  margin-top: 0.75rem;
  font-style: italic;
}

.footer {
  background-color: var(--color-primario);
  color: #cbd5e1;
  padding: 3rem 1.25rem 1.5rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-principal {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-marca .logo-texto strong {
  color: var(--color-superficie);
}

.footer-marca .logo-texto small {
  color: #94a3b8;
}

.footer-lema {
  margin-top: 0.85rem;
  font-size: 0.9rem;
  line-height: 1.5;
  color: #94a3b8;
}

.footer-col-title {
  color: var(--color-superficie);
  font-size: 1rem;
  margin-bottom: 0.85rem;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: #94a3b8;
}

.footer-links a:hover {
  color: var(--color-secundario);
}

.footer-creditos {
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: #94a3b8;
}

.footer-meta {
  margin-top: 0.4rem;
}

/* =========================================
   RESPONSIVE: TABLET (Breakpoint 768px)
   ========================================= */
@media (min-width: 768px) {
  .hero {
    padding: 4.5rem 2rem;
  }

  .hero-title {
    font-size: 2.75rem;
  }

  .hero-acciones {
    flex-direction: row;
    justify-content: center;
    max-width: none;
  }

  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    padding: 2rem;
  }

  .section {
    padding: 4.5rem 2rem;
  }

  .section-title {
    font-size: 2.15rem;
  }

  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .niveles-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .form-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .contacto-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-principal {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

/* =========================================
   RESPONSIVE: DESKTOP (Breakpoint 1024px)
   ========================================= */
@media (min-width: 1024px) {
  .nav-toggle {
    display: none;
  }

  .nav {
    position: static;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    padding: 0;
    box-shadow: none;
    border-bottom: none;
    background: transparent;
  }

  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: 1.75rem;
  }

  .nav-link {
    padding: 0;
    font-size: 0.95rem;
  }

  .nav-cta {
    margin-top: 0;
    padding: 0.6rem 1.15rem;
    font-size: 0.95rem;
  }

  .cards-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .inscripcion-layout {
    grid-template-columns: 1fr 1.25fr;
    align-items: start;
    gap: 3.5rem;
  }

  .inscripcion-form-wrapper {
    padding: 2.25rem;
  }
}