/* =========================================================================
   STRATUM DYNAMICS — style.css
   Design tokens tomados del Manual de Identidad Visual 2026.
   Paleta: Negro 50% / Murky 30% / Flour 20%
   Tipografía: Lemon Milk (display) + Nexa (texto) — con fallback web-safe
   hasta que se carguen los archivos de fuente con licencia (ver README).
   ========================================================================= */

/* -------------------------------------------------------------------------
   1. TOKENS DE MARCA
   ------------------------------------------------------------------------- */
:root {
  /* Colores corporativos (manual, sección VI) */
  --color-negro: #000000;
  --color-murky: #827d71;
  --color-murky-soft: #a39d90;
  --color-flour: #eae7dc;
  --color-flour-100: #f5f3ec; /* variante más clara, uso interno UI */
  --color-white: #ffffff;

  /* Roles semánticos (para no acoplar el diseño a nombres de color) */
  --bg-page: var(--color-flour);
  --bg-elevated: var(--color-flour-100);
  --bg-inverse: var(--color-negro);
  --text-primary: var(--color-negro);
  --text-inverse: var(--color-flour);
  --text-muted: var(--color-murky);
  --border-subtle: rgba(0, 0, 0, 0.12);
  --border-inverse: rgba(234, 231, 220, 0.18);
  --accent: var(--color-murky);
  --focus-ring: #2f6fed; /* accesibilidad: foco visible, no forma parte de la marca pero necesario para WCAG */

  /* Tipografía — sustituir por Lemon Milk / Nexa reales cuando se licencien (ver /assets/fonts) */
  --font-display: "LemonMilk", "Space Grotesk", "Poppins", ui-sans-serif, sans-serif;
  --font-body: "Nexa", "Inter", ui-sans-serif, -apple-system, sans-serif;

  /* Escala tipográfica */
  --fs-h1: clamp(2.1rem, 5vw + 1rem, 3.75rem);
  --fs-h2: clamp(1.6rem, 3vw + 1rem, 2.5rem);
  --fs-h3: clamp(1.15rem, 1.5vw + 1rem, 1.5rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-eyebrow: 0.75rem;

  /* Espaciado */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;

  /* Layout */
  --container-max: 1180px;
  --radius-sm: 2px;
  --radius-md: 4px;

  /* Motion — deliberadamente mínimo, ver Manual de Identidad + brief (sin animaciones innecesarias) */
  --transition-fast: 120ms ease;
}

/* -------------------------------------------------------------------------
   2. RESET LIGERO
   ------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-display); margin: 0 0 var(--space-2); line-height: 1.1; letter-spacing: 0.01em; }
p { margin: 0 0 var(--space-2); }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* Accesibilidad: foco visible siempre (requisito de la prioridad #4 del brief) */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

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

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.eyebrow {
  font-family: var(--font-display);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: inline-block;
  margin-bottom: var(--space-1);
}

/* -------------------------------------------------------------------------
   3. BOTONES / CTA
   ------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1.5px solid transparent;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.btn-primary { background: var(--color-negro); color: var(--color-flour); border-color: var(--color-flour); }
.btn-primary:hover { background: var(--color-murky); border-color: var(--color-murky); }
.btn-outline { border-color: var(--color-negro); color: var(--color-negro); background: transparent; }
.btn-outline:hover { background: var(--color-negro); color: var(--color-flour); }
.btn-inverse { background: var(--color-flour); color: var(--color-negro); }
.btn-inverse:hover { background: var(--color-murky-soft); }
.btn-full { width: 100%; justify-content: center; }

/* -------------------------------------------------------------------------
   4. HEADER
   ------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-negro);
  border-bottom: 1px solid var(--border-inverse);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-2);
}
.logo-mark { display: flex; align-items: center; gap: 0.6rem; color: var(--color-flour); }
.logo-mark svg { width: 34px; height: 34px; flex-shrink: 0; }
.logo-wordmark { font-family: var(--font-display); font-size: 1rem; letter-spacing: 0.05em; line-height: 1.15; }
.logo-wordmark span { display: block; color: var(--color-murky-soft); font-size: 0.68em; }

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}
.main-nav a {
  font-family: var(--font-display);
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
  color: var(--color-flour);
  text-transform: uppercase;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.main-nav a:hover { opacity: 1; }

.main-nav .btn-inverse {
  background: var(--color-flour);
  color: var(--color-negro);
  opacity: 1;
  transition:
    background var(--transition-fast),
    color var(--transition-fast);
}

.main-nav .btn-inverse:hover {
  background: var(--color-murky-soft);
  color: var(--color-flour);
  opacity: 1;
}

.nav-toggle { display: none; background: none; border: none; color: var(--color-flour); }

@media (max-width: 860px) {
  .main-nav { position: fixed; inset: 64px 0 0 0; background: var(--color-negro); padding: var(--space-4) var(--space-3); transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity var(--transition-fast), transform var(--transition-fast); }
  .main-nav.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .main-nav ul { flex-direction: column; gap: var(--space-3); }
  .main-nav .btn { margin-top: var(--space-3); display: inline-flex; }
  .nav-toggle { display: block; }
}

/* -------------------------------------------------------------------------
   5. HERO
   ------------------------------------------------------------------------- */
.hero {
  background: var(--color-negro);
  color: var(--color-flour);
  padding-block: var(--space-6) var(--space-6);
}
.hero .container { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: var(--space-5); align-items: center; }
.hero h1 { font-size: var(--fs-h1); color: var(--color-flour); }
.hero h1 em { font-style: normal; color: var(--color-murky-soft); }
.hero-lead { font-size: 1.15rem; color: var(--color-flour); opacity: 0.85; max-width: 46ch; margin-bottom: var(--space-3); }
.hero-cta-row { display: flex; gap: var(--space-2); flex-wrap: wrap; margin-bottom: var(--space-3); }
.hero-trust { display: flex; gap: var(--space-4); flex-wrap: wrap; padding-top: var(--space-3); border-top: 1px solid var(--border-inverse); }
.hero-trust-item { font-size: var(--fs-small); color: var(--color-murky-soft); max-width: 20ch; }
.hero-trust-item strong { display: block; font-family: var(--font-display); color: var(--color-flour); font-size: 1.4rem; }

.hero-panel {
  border: 1px solid var(--border-inverse);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: rgba(234, 231, 220, 0.04);
}
.hero-panel svg { width: 100%; height: auto; }

@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-panel { order: -1; max-width: 280px; margin-inline: auto; }
}

/* -------------------------------------------------------------------------
   6. SECCIONES GENERALES
   ------------------------------------------------------------------------- */
.section { padding-block: var(--space-6); }
.section-head { max-width: 62ch; margin-bottom: var(--space-4); }
.section-alt { background: var(--bg-elevated); }
.section-dark { background: var(--color-negro); color: var(--color-flour); }
.section-dark .eyebrow { color: var(--color-murky-soft); }

/* -------------------------------------------------------------------------
   7. SOBRE NOSOTROS
   ------------------------------------------------------------------------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); align-items: start; }
.about-pillars { display: grid; gap: var(--space-3); }
.pillar { border-top: 1px solid var(--border-subtle); padding-top: var(--space-2); }
.pillar h3 { font-size: 1rem; }
.pillar p { color: var(--text-muted); font-size: var(--fs-small); margin: 0; }

@media (max-width: 860px) { .about-grid { grid-template-columns: 1fr; } }

/* -------------------------------------------------------------------------
   8. SERVICIOS
   ------------------------------------------------------------------------- */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.service-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}
.service-card:hover { border-color: var(--color-murky); transform: translateY(-2px); }
.service-index { font-family: var(--font-display); color: var(--text-muted); font-size: var(--fs-small); margin-bottom: var(--space-2); }
.service-card h3 { font-size: 1.2rem; }
.service-problem { font-size: var(--fs-small); color: var(--text-muted); margin-bottom: var(--space-2); }
.service-problem strong { color: var(--text-primary); }
.service-card p.service-desc { flex-grow: 1; }
.service-card .btn { margin-top: var(--space-2); align-self: flex-start; }

@media (max-width: 900px) { .services-grid { grid-template-columns: 1fr; } }

/* -------------------------------------------------------------------------
   9. VALORES / POR QUÉ STRATUM
   ------------------------------------------------------------------------- */
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); }
.value-item { border-left: 2px solid var(--color-murky); padding-left: var(--space-2); }
.value-item h4 { font-family: var(--font-display); font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 0.35rem; }
.value-item p { font-size: var(--fs-small); color: rgba(234,231,220,0.75); margin: 0; }

@media (max-width: 900px) { .values-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .values-grid { grid-template-columns: 1fr; } }

/* -------------------------------------------------------------------------
   10. FORMULARIO DE CONTACTO
   ------------------------------------------------------------------------- */
.contact-wrap { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: var(--space-5); }
.contact-info-list { display: grid; gap: var(--space-3); margin-top: var(--space-3); }
.contact-info-item { display: flex; gap: var(--space-2); align-items: flex-start; }
.contact-info-item svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: 2px; color: var(--color-murky); }
.contact-info-item a { border-bottom: 1px solid var(--border-subtle); }

.form-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); }
.form-field { margin-bottom: var(--space-2); }
.form-field label { display: block; font-size: var(--fs-small); font-weight: 600; margin-bottom: 0.35rem; }
.form-field .hint { font-size: 0.78rem; color: var(--text-muted); font-weight: 400; margin-left: 0.35rem; }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--text-primary);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus { border-color: var(--color-negro); }
.form-field textarea { resize: vertical; min-height: 90px; }
.field-error { display: none; color: #a12626; font-size: 0.78rem; margin-top: 0.3rem; }
.form-field.has-error input,
.form-field.has-error select,
.form-field.has-error textarea { border-color: #a12626; }
.form-field.has-error .field-error { display: block; }

.consent-row { display: flex; gap: 0.6rem; align-items: flex-start; margin-bottom: var(--space-3); }
.consent-row input { width: 18px; height: 18px; margin-top: 3px; flex-shrink: 0; }
.consent-row label { font-size: 0.8rem; color: var(--text-muted); }
.consent-row a { text-decoration: underline; }

.form-status { margin-top: var(--space-2); font-size: var(--fs-small); }
.form-status[data-state="success"] { color: #1f7a3d; }
.form-status[data-state="error"] { color: #a12626; }

@media (max-width: 900px) {
  .contact-wrap { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

/* -------------------------------------------------------------------------
   11. FOOTER
   ------------------------------------------------------------------------- */
.site-footer { background: var(--color-negro); color: var(--color-murky-soft); padding-block: var(--space-4); }
.footer-grid { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-4); flex-wrap: wrap; }
.footer-brand { max-width: 32ch; }
.footer-brand .logo-mark { margin-bottom: var(--space-2); }
.footer-links { display: flex; gap: var(--space-4); flex-wrap: wrap; }
.footer-col h5 { font-family: var(--font-display); color: var(--color-flour); font-size: var(--fs-small); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-2); }
.footer-col ul { display: grid; gap: 0.5rem; }
.footer-col a { font-size: var(--fs-small); transition: color var(--transition-fast); }
.footer-col a:hover { color: var(--color-flour); }
.footer-bottom { margin-top: var(--space-4); padding-top: var(--space-3); border-top: 1px solid var(--border-inverse); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-2); font-size: 0.78rem; }

/* -------------------------------------------------------------------------
   12. WHATSAPP FLOTANTE (elemento con propósito: canal de contacto directo)
   ------------------------------------------------------------------------- */
.whatsapp-fab {
  position: fixed;
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 60;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-negro);
  color: var(--color-flour);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
  border: 1px solid var(--border-inverse);
  transition: transform var(--transition-fast), background var(--transition-fast);
}
.whatsapp-fab:hover { background: var(--color-murky); transform: translateY(-2px); }
.whatsapp-fab svg { width: 24px; height: 24px; }

/* -------------------------------------------------------------------------
   13. BANNER DE CONSENTIMIENTO (cookies / analítica)
   ------------------------------------------------------------------------- */
.consent-banner {
  position: fixed;
  left: var(--space-3);
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 70;
  max-width: 620px;
  margin-inline: auto;
  background: var(--color-negro);
  color: var(--color-flour);
  border: 1px solid var(--border-inverse);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  display: none;
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}
.consent-banner.is-visible { display: block; }
.consent-banner p { font-size: var(--fs-small); color: rgba(234,231,220,0.85); margin-bottom: var(--space-2); }
.consent-banner-actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

/* -------------------------------------------------------------------------
   14. UTILIDADES
   ------------------------------------------------------------------------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.placeholder-tag {
  display: inline-block;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: #a12626;
  color: #fff;
  padding: 2px 6px;
  border-radius: 3px;
  margin-left: 0.4rem;
  vertical-align: middle;
}

/* -------------------------------------------------------------------------
   15. FORMULARIO — DATOS PROGRESIVOS (details/summary nativo, sin JS extra)
   ------------------------------------------------------------------------- */
.form-more {
  border-top: 1px solid var(--border-subtle);
  margin: var(--space-2) 0;
  padding-top: var(--space-2);
}
.form-more summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-size: var(--fs-small);
  letter-spacing: 0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}
.form-more[open] summary { margin-bottom: var(--space-3); }

/* -------------------------------------------------------------------------
   16. RESALTE DE CAMPO PRESELECCIONADO (clic en "Quiero conocer más")
   ------------------------------------------------------------------------- */
.form-field.field-highlight select,
.form-field.field-highlight input {
  border-color: var(--color-murky);
  box-shadow: 0 0 0 3px rgba(130, 125, 113, 0.25);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

/* =========================================================================
   17. VALORES — RESALTE SUTIL SOBRE FONDO OSCURO
   ========================================================================= */

.value-item {
  position: relative;
  padding: var(--space-2);
  border-left: 2px solid var(--color-murky);
  border-radius: var(--radius-sm);
  background: transparent;

  transition:
    background-color var(--transition-fast),
    transform var(--transition-fast);
}

.value-item:hover {
  background-color: rgba(234, 231, 220, 0.045);
  transform: translateY(-2px);
}

.value-item h4,
.value-item p {
  color: inherit;
}