/* ============================================================================
   LEKAZO — main.css
   ============================================================================
   Hoja de estilos principal del landing.
   Estructura:
     1. Variables (custom properties) — editar aquí para cambios globales
     2. Reset base
     3. Tipografía
     4. Layout / contenedores
     5. Header y navegación
     6. Hero
     7. Secciones de contenido
     8. Tarjetas (servicios, lab, partners)
     9. FAQ
    10. Formulario
    11. Footer
    12. Utilidades y accesibilidad
    13. Responsive
   ============================================================================ */

/* ============================================================================
   1. VARIABLES (PALETA Y ESCALA)
   Paleta oficial Lekazo (manual de identidad):
     Púrpura: #70499C
     Azul:    #0B7ABF
     Verde:   #0CB1AD
   ============================================================================ */
:root {
  /* Colores de marca */
  --lkz-purple:   #70499C;
  --lkz-blue:     #0B7ABF;
  --lkz-teal:     #0CB1AD;

  /* Variaciones */
  --lkz-purple-dark:   #5a3a7e;
  --lkz-blue-dark:     #085d94;
  --lkz-teal-dark:     #09928f;
  --lkz-purple-light:  #9a75c4;

  /* Neutros */
  --ink:       #0f1220;
  --ink-soft:  #2a2e44;
  --mute:      #5b6077;
  --line:      #e4e7f1;
  --bg:        #ffffff;
  --bg-soft:   #f7f8fc;
  --bg-dark:   #0f1220;

  /* Gradientes */
  --gradient-brand: linear-gradient(135deg, var(--lkz-purple) 0%, var(--lkz-blue) 60%, var(--lkz-teal) 100%);
  --gradient-cta:   linear-gradient(135deg, var(--lkz-purple) 0%, var(--lkz-blue) 100%);

  /* Tipografía */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Tamaños (escala modular 1.25x) */
  --fs-xs:   0.85rem;
  --fs-sm:   0.95rem;
  --fs-base: 1rem;
  --fs-md:   1.15rem;
  --fs-lg:   1.4rem;
  --fs-xl:   1.75rem;
  --fs-2xl:  2.25rem;
  --fs-3xl:  3rem;
  --fs-4xl:  3.75rem;

  /* Espaciado */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radios y sombras */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(15,18,32,.06), 0 1px 3px rgba(15,18,32,.05);
  --shadow-md: 0 4px 20px rgba(15,18,32,.08);
  --shadow-lg: 0 20px 60px rgba(15,18,32,.14);
  --shadow-cta: 0 12px 30px rgba(112,73,156,.35);

  /* Transiciones */
  --t-fast: 150ms ease;
  --t-base: 250ms cubic-bezier(.2,.7,.3,1);

  /* Layout */
  --container: 1160px;
  --header-h: 70px;
}

/* ============================================================================
   2. RESET BASE
   ============================================================================ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; height: auto; }
button { font-family: inherit; cursor: pointer; }
a { color: var(--lkz-blue); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--lkz-purple); }

/* Respeta la preferencia de movimiento reducido */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================================
   3. TIPOGRAFÍA
   ============================================================================ */
h1, h2, h3, h4 { margin: 0 0 var(--space-4); line-height: 1.2; font-weight: 700; color: var(--ink); }
h1 { font-size: clamp(2.2rem, 5vw, var(--fs-4xl)); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.75rem, 3.5vw, var(--fs-2xl)); letter-spacing: -0.01em; }
h3 { font-size: var(--fs-lg); }
p  { margin: 0 0 var(--space-4); }

.section-title { text-align: center; margin-bottom: var(--space-4); }
.section-lead  { text-align: center; max-width: 720px; margin: 0 auto var(--space-12); color: var(--mute); font-size: var(--fs-md); }
.section-eyebrow {
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--lkz-teal);
  margin-bottom: var(--space-3);
}

/* ============================================================================
   4. LAYOUT / CONTENEDORES
   ============================================================================ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* ============================================================================
   5. HEADER Y NAVEGACIÓN
   ============================================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-base), box-shadow var(--t-base);
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: var(--space-6);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--ink);
  font-weight: 700;
}
.brand:hover { color: var(--lkz-purple); }
.brand-logo { width: 36px; height: 36px; }
.brand-name { font-size: var(--fs-lg); letter-spacing: -0.01em; }

.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.primary-nav ul {
  display: flex;
  list-style: none;
  gap: var(--space-6);
  margin: 0; padding: 0;
}
.primary-nav a {
  color: var(--ink-soft);
  font-weight: 500;
  font-size: var(--fs-sm);
}
.primary-nav a:hover { color: var(--lkz-purple); }

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: var(--bg-soft);
  padding: 3px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
}
.lang-btn {
  background: transparent;
  border: 0;
  padding: 5px 10px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--mute);
  border-radius: var(--radius-pill);
  letter-spacing: 0.05em;
  transition: all var(--t-fast);
}
.lang-btn[aria-pressed="true"] {
  background: var(--gradient-cta);
  color: white;
}
.lang-btn:hover:not([aria-pressed="true"]) { color: var(--ink); }

/* Toggle hamburguesa (oculto en desktop) */
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
  border-radius: var(--radius-sm);
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--t-base), opacity var(--t-base);
}

/* ============================================================================
   6. HERO
   ============================================================================ */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(4rem, 10vw, 7rem);
  color: white;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.hero-bg svg { width: 100%; height: 100%; }
.hero-inner { max-width: 880px; }
.hero-eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
  backdrop-filter: blur(6px);
}
.hero-title {
  color: white;
  margin-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.hero-accent {
  background: linear-gradient(90deg, #ffffff, #b8e9e8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: clamp(var(--fs-md), 2vw, var(--fs-lg));
  color: rgba(255,255,255,0.92);
  max-width: 720px;
  margin-bottom: var(--space-8);
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
  list-style: none;
  padding: 0; margin: 0;
}
.hero-badges li {
  display: flex; align-items: center; gap: 6px;
  font-size: var(--fs-sm);
  color: rgba(255,255,255,0.95);
}
.hero-badges strong {
  color: var(--lkz-teal);
  background: white;
  width: 22px; height: 22px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: var(--fs-xs);
}

/* ============================================================================
   7. BOTONES (usados globalmente)
   ============================================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--fs-sm);
  text-align: center;
  border: 1px solid transparent;
  transition: transform var(--t-fast), box-shadow var(--t-base), background var(--t-base);
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 3px solid var(--lkz-teal);
  outline-offset: 2px;
}
.btn-sm { padding: 8px 16px; font-size: var(--fs-xs); }
.btn-lg { padding: 16px 28px; font-size: var(--fs-md); }
.btn-block { width: 100%; }

/* Nota: usamos selectores con clase doble (.btn.btn-primary) para ganar
   especificidad sobre .primary-nav a { color: var(--ink-soft) } y cualquier
   regla genérica de <a>. Antes causaba que el texto del botón del header
   ("Diagnóstico gratis") se viera gris oscuro sobre el fondo azul. */
.btn.btn-primary,
.btn.btn-primary:link,
.btn.btn-primary:visited {
  background: var(--gradient-cta);
  color: #ffffff;
  box-shadow: var(--shadow-cta);
}
.btn.btn-primary:hover,
.btn.btn-primary:focus,
.btn.btn-primary:active {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(112,73,156,.45);
  color: #ffffff;
}

.btn-ghost {
  background: transparent;
  color: white;
  border-color: rgba(255,255,255,0.35);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.12);
  color: white;
}

/* Botón primario sobre fondo claro (en header y form): sombra más suave */
.site-header .btn.btn-primary,
.contact-form .btn.btn-primary {
  box-shadow: 0 6px 18px rgba(112,73,156,.25);
}

/* ============================================================================
   8. SECCIONES
   ============================================================================ */
section { padding: clamp(3rem, 7vw, 6rem) 0; }

.value-prop { background: var(--bg-soft); }
.value-prop .section-title { margin-bottom: var(--space-3); }

.value-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
  list-style: none;
  padding: 0; margin: var(--space-8) 0 0;
  counter-reset: step;
}
.value-steps li {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  transition: transform var(--t-base), border-color var(--t-base);
}
.value-steps li:hover {
  transform: translateY(-4px);
  border-color: var(--lkz-blue);
}
.step-num {
  width: 44px; height: 44px;
  background: var(--gradient-brand);
  color: white;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: var(--fs-md);
  margin-bottom: var(--space-4);
}
.value-steps h3 { color: var(--ink); margin-bottom: var(--space-2); }
.value-steps p  { color: var(--mute); margin: 0; }

/* ============================================================================
   TARJETAS (Servicios, Lab)
   ============================================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}
.card {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.card-icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  background: var(--gradient-brand);
  color: white;
  margin-bottom: var(--space-2);
}
.card-icon svg { width: 24px; height: 24px; }
.card h3 { margin: 0; color: var(--ink); }
.card p  { color: var(--mute); margin: 0; flex: 1; }
.card-cta {
  margin-top: var(--space-4);
  font-weight: 600;
  color: var(--lkz-purple);
  align-self: flex-start;
  position: relative;
  transition: transform var(--t-fast);
}
.card-cta:hover {
  color: var(--lkz-blue);
  transform: translateX(4px);
}

/* Lab: un acento diferente */
.lab { background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%); }
.card-lab .card-icon { background: linear-gradient(135deg, var(--lkz-teal) 0%, var(--lkz-blue) 100%); }

/* ============================================================================
   PARTNERS
   ============================================================================ */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-8);
}
.partner {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  color: var(--ink);
  transition: border-color var(--t-base), transform var(--t-base);
  display: block;
}
.partner:hover {
  transform: translateY(-4px);
  border-color: var(--lkz-teal);
  color: var(--ink);
}
.partner-name {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--lkz-purple);
}
.partner p { color: var(--mute); margin: 0; }

/* ============================================================================
   9. FAQ
   ============================================================================ */
.faq { background: var(--bg-soft); }
.faq-list {
  max-width: 820px;
  margin: var(--space-8) auto 0;
  display: grid;
  gap: var(--space-4);
}
.faq-item {
  background: white;
  padding: var(--space-6);
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
}
.faq-item dt {
  font-weight: 600;
  color: var(--ink);
  margin-bottom: var(--space-2);
}
.faq-item dd {
  margin: 0;
  color: var(--mute);
}

/* ============================================================================
   10. FORMULARIO DE CONTACTO
   ============================================================================ */
.contact {
  background: var(--gradient-brand);
  color: white;
}
.contact .section-eyebrow { color: #b8e9e8; text-align: left; }
.contact .section-title,
.contact .section-lead {
  color: white; text-align: left;
  margin-inline: 0;
}
.contact .section-lead { color: rgba(255,255,255,0.9); }

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}
.contact-copy .section-title { margin-bottom: var(--space-4); }
.contact-points {
  list-style: none;
  padding: 0; margin: 0;
  display: grid;
  gap: var(--space-2);
  color: rgba(255,255,255,0.95);
  font-size: var(--fs-md);
}

.contact-form {
  background: white;
  color: var(--ink);
  padding: var(--space-12);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.form-row { margin-bottom: var(--space-4); }
.form-row label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: var(--space-2);
}
.form-row input[type="text"],
.form-row input[type="email"],
.form-row textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: var(--fs-base);
  font-family: inherit;
  color: var(--ink);
  background: white;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--lkz-purple);
  box-shadow: 0 0 0 3px rgba(112,73,156,.15);
}
.form-row textarea { resize: vertical; min-height: 110px; }

.form-consent {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
}
.form-consent label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-weight: 400;
  color: var(--mute);
  font-size: var(--fs-sm);
  cursor: pointer;
}
.form-consent input[type="checkbox"] { margin-top: 3px; accent-color: var(--lkz-purple); }

/* Honeypot: completamente oculto (no display:none porque algunos bots lo detectan) */
.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px; height: 1px;
  overflow: hidden;
}

.form-feedback {
  margin-top: var(--space-4);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  min-height: 0;
  transition: opacity var(--t-base);
}
.form-feedback.success {
  background: #e8faf7;
  color: var(--lkz-teal-dark);
  border: 1px solid var(--lkz-teal);
  padding: var(--space-4);
}
.form-feedback.error {
  background: #fdecec;
  color: #c44;
  border: 1px solid #e99;
  padding: var(--space-4);
}

.form-fallback {
  margin: var(--space-4) 0 0;
  font-size: var(--fs-sm);
  color: var(--mute);
  text-align: center;
}

/* ============================================================================
   11. FOOTER
   ============================================================================ */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.75);
  padding: var(--space-12) 0 var(--space-6);
}
.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-6);
  align-items: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: white;
  font-weight: 700;
  font-size: var(--fs-md);
}
.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-6);
}
.footer-nav a {
  color: rgba(255,255,255,0.75);
  font-size: var(--fs-sm);
}
.footer-nav a:hover { color: var(--lkz-teal); }
.footer-social { display: flex; gap: var(--space-3); }
.footer-social a {
  color: rgba(255,255,255,0.65);
  transition: color var(--t-fast);
}
.footer-social a:hover { color: var(--lkz-teal); }
.footer-copy {
  grid-column: 1 / -1;
  text-align: center;
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.5);
  margin: var(--space-8) 0 0;
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255,255,255,0.1);
}

/* ============================================================================
   12. UTILIDADES Y ACCESIBILIDAD
   ============================================================================ */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--lkz-purple);
  color: white;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 100;
  font-weight: 600;
  transition: top var(--t-fast);
}
.skip-link:focus {
  top: var(--space-4);
  color: white;
}

/* Foco visible consistente en todos los elementos interactivos */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--lkz-teal);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ============================================================================
   13. RESPONSIVE
   ============================================================================ */

/* Tablet / mobile grande */
@media (max-width: 900px) {
  .contact-inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-brand { justify-content: center; }
}

/* Mobile */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  /* ------------------------------------------------------------------
     Menú móvil: panel que se desliza desde arriba.

     FIX (reporte PM): antes el panel quedaba visible parcialmente
     (una "pestaña" sobre el header) porque translateY(-110%) no
     ocultaba la sombra ni el borde, y además el panel seguía en
     el árbol de accesibilidad. Ahora:
       - Estado cerrado: visibility:hidden + opacity:0 + pointer-events:none
         → desaparece COMPLETO (sombra incluida) y no captura taps.
       - Estado abierto (.open): visibility:visible + opacity:1.
       - La transición mantiene el slide suave original.
     ------------------------------------------------------------------ */
  .primary-nav {
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: white;
    padding: var(--space-6);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      transform var(--t-base),
      opacity var(--t-base),
      visibility 0s linear var(--t-base);
    z-index: 40;
  }
  .primary-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition:
      transform var(--t-base),
      opacity var(--t-base),
      visibility 0s linear 0s;
  }
  .primary-nav ul {
    flex-direction: column;
    gap: var(--space-4);
    width: 100%;
  }
  .primary-nav a {
    font-size: var(--fs-md);
    display: block;
    padding: var(--space-2) 0;
  }
  .lang-switch { align-self: flex-start; }

  .hero-ctas { flex-direction: column; align-items: stretch; }
  .hero-ctas .btn { width: 100%; }

  .contact-form { padding: var(--space-6); }
}

/* Mobile chico: mantener el nombre de la marca visible junto al logo.
   FIX (reporte PM): el nombre "Lekazo" había desaparecido en pantallas
   muy estrechas. Lo restauramos con tamaño reducido para que encaje
   sin romper el layout del header. */
@media (max-width: 480px) {
  .brand-name { font-size: var(--fs-md); }
  .hero-badges { gap: var(--space-3); }
  .hero-badges li { font-size: var(--fs-xs); }
}

/* Print: quitar el header fijo y las animaciones */
@media print {
  .site-header, .footer-social, .hero-ctas, .contact-form, .nav-toggle { display: none; }
  .hero, .contact { background: white; color: var(--ink); }
}