/* ========================================
   POLiGEN - Landing Page Principal
   Estática, segura, rápida y accesible
   ======================================== */

/* === VARIABLES === */
:root {
  /* Colores - Paleta Turquesa POLiGEN */
  --color-bg: #fbfcfb;
  --color-surface: #ffffff;
  --color-surface-soft: #f0fffe;
  --color-text: #0a2d2b;
  --color-text-muted: #5f716d;
  --color-primary: #0ABAB5;
  --color-primary-dark: #078282;
  --color-accent: #C3FFFF;
  --color-accent-soft: #86FFFF;
  --color-border: #b3e5e3;

  /* Tipografía */
  --font-family: Inter, "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.6;

  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Bordes y sombras */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(18, 35, 33, 0.08);
  --shadow-md: 0 4px 12px rgba(18, 35, 33, 0.10);
  --shadow-lg: 0 12px 32px rgba(18, 35, 33, 0.12);

  /* Transiciones */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.4s ease;
}

/* === RESET Y BASE === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

/* Solo aplicar scroll-padding cuando hay navegación a anclas */
html:target,
:target {
  scroll-margin-top: 120px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-family);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === UTILIDADES === */
.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
}

/* === HEADER === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(251, 252, 251, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-base);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100px;
  padding: var(--spacing-sm) 0;
}

@media (max-width: 768px) {
  .header-container {
    height: 80px;
  }
}

.logo {
  text-decoration: none;
  color: var(--color-text);
  display: flex;
  align-items: center;
}

.logo img {
  height: 80px;
  width: auto;
}

@media (max-width: 768px) {
  .logo img {
    height: 60px;
  }
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav {
  display: none;
}

@media (min-width: 1024px) {
  .nav {
    display: block;
  }
}

.nav-list {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-primary);
}

/* Botón header */
.btn-header {
  display: none;
}

@media (min-width: 768px) {
  .btn-header {
    display: inline-flex;
  }
}

/* Menú hamburguesa */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
}

@media (min-width: 1024px) {
  .menu-toggle {
    display: none;
  }
}

.menu-icon {
  position: relative;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: background-color var(--transition-fast);
}

.menu-icon::before,
.menu-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform var(--transition-base);
}

.menu-icon::before {
  top: -7px;
}

.menu-icon::after {
  bottom: -7px;
}

.menu-toggle[aria-expanded="true"] .menu-icon {
  background-color: transparent;
}

.menu-toggle[aria-expanded="true"] .menu-icon::before {
  transform: rotate(45deg) translateY(7px);
}

.menu-toggle[aria-expanded="true"] .menu-icon::after {
  transform: rotate(-45deg) translateY(-7px);
}

/* Navegación móvil */
@media (max-width: 1023px) {
  .nav {
    display: block;
    position: fixed;
    top: 100px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }

  .nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .nav-link {
    display: block;
    padding: var(--spacing-sm);
  }
}

@media (max-width: 768px) {
  .nav {
    top: 80px !important;
  }

  .header-container {
    height: 80px;
  }
}

/* === BOTONES === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-family);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, #0ABABA 100%);
  color: var(--color-surface);
  box-shadow: 0 4px 12px rgba(10, 186, 181, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, #078282 100%);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(10, 186, 181, 0.35);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-primary-dark);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-accent);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1rem;
}

/* === HERO === */
.hero {
  padding-top: calc(100px + var(--spacing-3xl));
  padding-bottom: var(--spacing-3xl);
  position: relative;
  background-color: #0a1622;
  overflow: hidden;
}

@media (max-width: 768px) {
  .hero {
    padding-top: calc(80px + var(--spacing-2xl));
  }
}

/* Imagen de fondo del microscopio */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../assets/images/microscopio-hero.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.65;
  z-index: 0;
}

/* Overlay muy sutil para mejorar legibilidad del texto */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 45, 43, 0.40) 0%, rgba(10, 186, 181, 0.30) 100%);
  z-index: 1;
}

.hero-container {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.hero-content {
  max-width: 800px;
}

.hero-actions {
  justify-content: center;
}

.hero-badges {
  justify-content: center;
}

.hero-label {
  display: inline-block;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.95);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background-color: rgba(10, 186, 181, 0.85);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  backdrop-filter: blur(8px);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  box-shadow: 0 0 20px rgba(10, 186, 181, 0.3);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-surface);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.hero-text {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.4);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.badge {
  display: inline-block;
  padding: 0.375rem 0.875rem;
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--color-surface);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 20px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Bloques imagen-texto intercalados */
.image-text-block {
  padding: var(--spacing-3xl) 0;
}

.image-text-block:nth-child(even) {
  background-color: var(--color-surface-soft);
}

.image-text-container {
  display: grid;
  gap: var(--spacing-2xl);
  align-items: center;
}

@media (min-width: 768px) {
  .image-text-container {
    grid-template-columns: 1fr 1fr;
  }

  .image-text-container.reverse {
    direction: rtl;
  }

  .image-text-container.reverse > * {
    direction: ltr;
  }
}

.image-text-image {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-surface-soft);
  border: 2px dashed var(--color-border);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-text-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-text-image svg {
  width: 100%;
  max-width: 400px;
}

.image-text-content h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.image-text-content p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

/* === BANDA DE CONFIANZA === */
.trust-band {
  padding: var(--spacing-2xl) 0;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.trust-container {
  display: grid;
  gap: var(--spacing-lg);
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-sm);
}

.trust-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.trust-item span {
  font-size: 0.9375rem;
  color: var(--color-text);
  font-weight: 500;
}

/* === SECCIONES GENERALES === */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--spacing-3xl);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.section-text {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* === SERVICIOS === */
.services {
  padding: var(--spacing-3xl) 0;
}

.services-grid {
  display: grid;
  gap: var(--spacing-xl);
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.service-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 0;
  overflow: hidden;
  transition: all var(--transition-base);
}

.service-card:hover {
  box-shadow: 0 12px 32px rgba(10, 186, 181, 0.15);
  transform: translateY(-4px);
  border-color: var(--color-primary);
  background: linear-gradient(180deg, #ffffff 0%, var(--color-surface-soft) 100%);
}

.service-card-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background-color: var(--color-surface-soft);
}

.service-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.service-card-image svg {
  width: 100%;
  height: 100%;
}

.service-card-title {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
  padding: 0 var(--spacing-xl);
  padding-top: var(--spacing-lg);
}

.service-card-text {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
  padding: 0 var(--spacing-xl);
}

.service-card-list {
  list-style: none;
  margin-bottom: var(--spacing-lg);
  padding: 0 var(--spacing-xl);
}

.service-card-list li {
  position: relative;
  padding-left: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.service-card-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.service-card .btn {
  margin: 0 var(--spacing-xl) var(--spacing-xl);
}

/* === CÓMO FUNCIONA === */
.how-it-works {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-surface);
}

.steps {
  display: grid;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step {
  text-align: center;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-soft) 100%);
  color: var(--color-primary-dark);
  font-size: 1.5rem;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: var(--spacing-md);
  box-shadow: 0 4px 12px rgba(10, 186, 181, 0.2);
}

.step-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.step-text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.how-it-works-cta {
  text-align: center;
}

/* === SECCIONES DE DETALLE (Veterinaria, Agricultura, Genética) === */
.detail-section {
  padding: var(--spacing-3xl) 0;
}

.veterinaria-section {
  background-color: var(--color-surface-soft);
}

.agricultura-section {
  background-color: var(--color-surface);
}

.genetica-section {
  background-color: var(--color-surface-soft);
}

.detail-content {
  max-width: 800px;
  margin: 0 auto;
}

.detail-label {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.detail-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.detail-text {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
}

.detail-services {
  display: grid;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

@media (min-width: 640px) {
  .detail-services {
    grid-template-columns: repeat(2, 1fr);
  }
}

.detail-service-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--color-text);
  font-weight: 500;
}

.detail-service-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

.detail-note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  padding: var(--spacing-md);
  background-color: var(--color-accent);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-lg);
}

.detail-pricing {
  font-size: 1.125rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

/* === POR QUÉ POLIGEN === */
.why-poligen {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-surface);
}

.why-grid {
  display: grid;
  gap: var(--spacing-xl);
  max-width: 1000px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .why-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.why-item {
  text-align: center;
}

.why-item-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.why-item-text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* === CTA FINAL === */
.cta-final {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-surface);
}

.cta-content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.cta-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-surface);
  margin-bottom: var(--spacing-md);
}

.cta-text {
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
}

.cta-final .btn-primary {
  background: var(--color-surface) !important;
  color: var(--color-primary) !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2) !important;
}

.cta-final .btn-primary:hover {
  background: rgba(255, 255, 255, 0.9) !important;
  color: var(--color-primary-dark) !important;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3) !important;
}

.cta-final .btn-secondary {
  border-color: var(--color-surface) !important;
  color: var(--color-surface) !important;
  background: transparent !important;
}

.cta-final .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* === CONTACTO === */
.contact {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-surface-soft);
}

.contact-content {
  max-width: 720px;
  margin: 0 auto;
}

.contact-methods {
  display: grid;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
}

@media (min-width: 640px) {
  .contact-methods {
    grid-template-columns: repeat(3, 1fr);
  }
}

.contact-method {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition-base);
  text-align: center;
}

.contact-method:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

.contact-method-icon {
  width: 32px;
  height: 32px;
  color: var(--color-primary);
}

.contact-method strong {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.contact-method span {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.contact-info {
  text-align: center;
  padding: var(--spacing-lg);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.contact-info strong {
  color: var(--color-text);
  font-weight: 600;
}

/* === FOOTER === */
.footer {
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, #0a4f4c 100%);
  color: rgba(255, 255, 255, 0.85);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer-main {
  display: grid;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

@media (min-width: 640px) {
  .footer-main {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-surface);
  margin-bottom: var(--spacing-sm);
}

.footer-logo img {
  height: 70px;
  width: auto;
}

.footer-tagline {
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-nav-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-surface);
  margin-bottom: var(--spacing-sm);
}

.footer-nav-list {
  list-style: none;
}

.footer-nav-list li {
  margin-bottom: var(--spacing-xs);
}

.footer-nav-list a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-nav-list a:hover {
  color: var(--color-surface);
}

.footer-contact {
  font-size: 0.875rem;
  line-height: 1.6;
}

.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.8125rem;
}

/* === MENÚ DESPLEGABLE === */
.nav-item {
  position: relative;
}

.nav-item.has-submenu > .nav-link::after {
  content: ' ▾';
  font-size: 0.8em;
  margin-left: 0.25rem;
}

.submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  min-width: 220px;
  padding: var(--spacing-xs) 0;
  z-index: 1000;
}

.nav-item.has-submenu:hover .submenu,
.nav-item.has-submenu:focus-within .submenu {
  display: block;
}

.submenu li {
  list-style: none;
}

.submenu .nav-link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text);
  text-decoration: none;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.submenu .nav-link:hover,
.submenu .nav-link:focus {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
}

.submenu .nav-link.destacado {
  background-color: var(--color-accent-soft);
  font-weight: 600;
  border-left: 3px solid var(--color-primary);
}

/* Móvil: submenú se despliega verticalmente */
@media (max-width: 1023px) {
  .submenu {
    position: static;
    display: none;
    box-shadow: none;
    border: none;
    border-left: 2px solid var(--color-primary);
    margin-left: var(--spacing-md);
    padding-left: var(--spacing-sm);
  }
  
  .nav-item.has-submenu.active .submenu {
    display: block;
  }
  
  .nav-item.has-submenu > .nav-link {
    cursor: pointer;
  }
}