/* ==========================================================================
   LEGHMONT SHIPPING S.R.L. - ESTILOS PRINCIPALES
   Inspiración MotionSites: Tipografía moderna, amplios espacios y movimiento sutil
   Accesibilidad WCAG 2.1 AA | Mobile-First Responsive
   ========================================================================== */

/* 1. VARIABLES GLOBALES (DESIGN TOKENS) */
:root {
  /* Identidad Cromática Marítima & Logística */
  --color-primary: #0B1B3D;         /* Azul Océano Profundo */
  --color-primary-hover: #071228;
  --color-primary-light: #EEF2F6;
  
  --color-accent: #0284C7;          /* Cyan Eléctrico / Acento */
  --color-accent-hover: #0369A1;
  --color-accent-light: #E0F2FE;
  
  --color-whatsapp: #25D366;
  --color-whatsapp-hover: #1EBE5D;

  --color-bg: #F8FAFC;              /* Fondo claro frío/limpio */
  --color-surface: #FFFFFF;         /* Contenedores y tarjetas */
  --color-surface-alt: #F1F5F9;     /* Secciones alternas */
  --color-surface-dark: #071228;    /* Fondo oscuro para footer y banners */

  --color-text: #0F172A;            /* Texto de máximo contraste */
  --color-text-muted: #475569;      /* Texto descriptivo */
  --color-text-light: #64748B;
  --color-border: #E2E8F0;
  --color-border-hover: #CBD5E1;
  --color-focus: #0284C7;

  /* Tipografías */
  --font-heading: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  /* Escala tipográfica fluida con clamp() */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.15rem, 1.05rem + 0.5vw, 1.35rem);
  --text-xl: clamp(1.35rem, 1.2rem + 0.75vw, 1.75rem);
  --text-2xl: clamp(1.75rem, 1.45rem + 1.2vw, 2.35rem);
  --text-3xl: clamp(2.2rem, 1.75rem + 2vw, 3.25rem);
  --text-hero: clamp(2.6rem, 1.9rem + 3.2vw, 4.25rem);

  /* Espaciado de sección fluido */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: clamp(4.5rem, 8vw, 7.5rem);

  /* Contenedores */
  --container-max: 1220px;
  --container-padding: clamp(1.25rem, 4vw, 2.5rem);

  /* Radios y Sombras */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-subtle: 0 4px 20px rgba(11, 27, 61, 0.04);
  --shadow-card: 0 10px 30px rgba(11, 27, 61, 0.06);
  --shadow-hover: 0 18px 40px rgba(11, 27, 61, 0.12);

  --transition-fast: 0.2s ease;
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 2. RESET Y ACCESIBILIDAD */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Skip Link para accesibilidad por teclado */
.skip-link {
  position: absolute;
  top: -120px;
  left: 1.5rem;
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  z-index: 10000;
  text-decoration: none;
  font-weight: 700;
  border: 2px solid var(--color-accent);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1.5rem;
  outline: 3px solid var(--color-accent);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

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

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

/* 3. TIPOGRAFÍA Y ESTRUCTURA GENERAL */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--text-hero); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

p.lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.55;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section-spacer {
  padding-block: var(--space-2xl);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: var(--space-xl);
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--color-accent);
  background-color: var(--color-accent-light);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.85rem;
}

/* 4. CABECERA Y MENÚ DE NAVEGACIÓN */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 84px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-img {
  height: 52px;
  width: auto;
  max-width: 260px;
  object-fit: contain;
  display: block;
}

.footer-brand .brand-logo-card {
  background: #FFFFFF;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 0.75rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.footer-brand .brand-logo-card .brand-img {
  height: 44px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  position: relative;
  padding-block: 0.35rem;
  transition: color var(--transition-fast);
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2.5px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-primary);
  border-radius: var(--radius-sm);
}

.menu-toggle svg {
  width: 30px;
  height: 30px;
}

/* 5. BOTONES Y ACCIONES */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.65rem;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  border-radius: var(--radius-full);
  transition: var(--transition-smooth);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(2, 132, 199, 0.25);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.btn-accent:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(2, 132, 199, 0.3);
}

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

.btn-outline:hover {
  background-color: var(--color-surface);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-whatsapp {
  background-color: var(--color-whatsapp);
  color: #FFFFFF;
}

.btn-whatsapp:hover {
  background-color: var(--color-whatsapp-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(37, 211, 102, 0.25);
}

/* 6. HERO SECTION ESTILO MOTIONSITES */
.hero {
  padding-top: clamp(3rem, 6vw, 5.5rem);
  padding-bottom: clamp(4rem, 8vw, 6.5rem);
  position: relative;
  background: radial-gradient(circle at 85% 20%, rgba(2, 132, 199, 0.08) 0%, transparent 60%),
              radial-gradient(circle at 10% 80%, rgba(11, 27, 61, 0.05) 0%, transparent 50%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: var(--space-xl);
}

.hero-content h1 {
  margin-bottom: var(--space-md);
}

.hero-content h1 span.highlight {
  color: var(--color-accent);
}

.hero-content p.lead {
  margin-bottom: var(--space-lg);
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: var(--space-xl);
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.stat-item .stat-num {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
}

.stat-item .stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  font-weight: 500;
}

/* Tarjeta interactiva en el Hero (Calculador / Selector de Fletes) */
.hero-widget-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  box-shadow: var(--shadow-card);
  position: relative;
}

.widget-header {
  margin-bottom: var(--space-md);
}

.widget-header h3 {
  font-size: var(--text-lg);
  margin-bottom: 0.25rem;
}

.widget-header p {
  font-size: var(--text-xs);
  color: var(--color-text-light);
}

.mode-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-bottom: var(--space-md);
}

.mode-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.75rem 0.5rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  transition: var(--transition-fast);
}

.mode-btn.active, .mode-btn:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
  color: var(--color-primary);
}

/* 7. TARJETAS DE SERVICIOS Y DIFERENCIALES */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-md);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(2, 132, 199, 0.3);
}

.card-media {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: var(--space-md);
  background-color: var(--color-surface-alt);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-smooth);
}

.card:hover .card-media img {
  transform: scale(1.05);
}

.hero-img-showcase {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  aspect-ratio: 16 / 10;
  margin-bottom: var(--space-md);
}

.hero-img-showcase img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.service-banner-img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  display: block;
}

.card-icon-wrap {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-sm);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.card-icon-wrap svg {
  width: 30px;
  height: 30px;
}

.card h3 {
  margin-bottom: var(--space-xs);
}

.card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-md);
  flex-grow: 1;
}

.card-link {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.card-link:hover {
  color: var(--color-accent-hover);
  gap: 0.55rem;
}

/* 8. FLUJO DE TRABAJO (STEP-BY-STEP FLOW) */
.flow-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-md);
  position: relative;
}

.step-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  position: relative;
}

.step-number {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-accent);
  opacity: 0.85;
  margin-bottom: 0.5rem;
}

.step-card h4 {
  margin-bottom: 0.35rem;
}

.step-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* 9. PREGUNTAS FRECUENTES (FAQ ACCESIBLE) */
.faq-container {
  max-width: 820px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-subtle);
}

.faq-summary {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-summary::after {
  content: '+';
  font-size: 1.6rem;
  color: var(--color-accent);
  line-height: 1;
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-summary::after {
  content: '−';
}

.faq-content {
  padding: 0 1.5rem 1.35rem;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 10. FORMULARIO DE CONTACTO & COTIZACIÓN ACCESIBLE */
.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-xl);
}

.form-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  box-shadow: var(--shadow-card);
}

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

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

input:focus, select:focus, textarea:focus {
  border-color: var(--color-accent);
  background-color: #FFFFFF;
  outline: none;
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.input-error {
  border-color: #EF4444 !important;
}

.form-alert {
  padding: 1rem;
  border-radius: var(--radius-sm);
  margin-top: 1rem;
  font-size: var(--text-sm);
  font-weight: 600;
}

.form-alert.success {
  background-color: #ECFDF5;
  color: #065F46;
  border: 1px solid #A7F3D0;
}

.form-alert.error {
  background-color: #FEF2F2;
  color: #991B1B;
  border: 1px solid #FECACA;
}

/* Tarjeta informativa lateral de contacto */
.contact-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.info-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.info-item:last-child {
  margin-bottom: 0;
}

.info-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.info-icon svg {
  width: 22px;
  height: 22px;
}

.info-text h4 {
  font-size: var(--text-sm);
  margin-bottom: 0.15rem;
}

.info-text p, .info-text a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.info-text a:hover {
  color: var(--color-accent);
}

/* 11. PIE DE PÁGINA (FOOTER) */
.site-footer {
  margin-top: auto;
  background: var(--color-surface-dark);
  color: #CBD5E1;
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-brand p {
  font-size: var(--text-sm);
  color: #94A3B8;
  margin-top: 0.75rem;
  max-width: 320px;
}

.footer-col h5 {
  color: #FFFFFF;
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-col a {
  color: #94A3B8;
  font-size: var(--text-sm);
}

.footer-col a:hover {
  color: #38BDF8;
}

.footer-bottom {
  padding-top: var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-xs);
  color: #64748B;
}

/* 12. ANIMACIONES Y MICROINTERACCIONES (SCROLL REVEAL) */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 13. RESPONSIVE DESIGN (MEDIA QUERIES) */
@media (max-width: 992px) {
  .hero-grid,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  .header-actions .btn {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 84px;
    left: 0;
    width: 100%;
    background: #FFFFFF;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-md) var(--container-padding) var(--space-lg);
    gap: 1.25rem;
    align-items: flex-start;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-card);
  }

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

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

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

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}

/* 14. PREFERENCIA DE MOVIMIENTO REDUCIDO */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }
}