/* ==========================================================================
   Umbral Absoluto — styles.css
   Sistema de identidad v1.1. Tokens en docs/BRAND_MANUAL.md.
   Tipografía real cargada vía Google Fonts en index.html (Archivo + IBM Plex Mono).
   ========================================================================== */

:root {
  /* Color primario */
  --color-negro: #1A1A1A;
  --color-blanco-hueso: #E5E2DC;
  --color-gris-concreto: #8C8C88;
  --color-rojo-bauhaus: #D6402C;   /* acento — solo trazos, líneas finas, marcadores pequeños */
  --color-rojo-solido: #A82F1F;    /* variante segura en contraste para fondos sólidos con texto */

  /* Neutros */
  --neutro-900: #1A1A1A;
  --neutro-800: #2E2E2C;
  --neutro-700: #454542;
  --neutro-600: #5C5C58;
  --neutro-500: #8C8C88;
  --neutro-400: #A8A6A0;
  --neutro-300: #C4C2BB;
  --neutro-200: #D8D5CE;
  --neutro-100: #E5E2DC;
  --neutro-050: #F2F0EC;

  /* Estados */
  --state-focus-ring: rgba(168, 47, 31, 0.35);
  --state-disabled-bg: #C4C2BB;
  --state-disabled-text: #8C8C88;

  /* Tipografía */
  --font-display: "Archivo", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-primary: "Archivo", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --text-h1: 3.052rem;
  --text-h2: 2.441rem;
  --text-h3: 1.5rem;
  --text-h4: 1.25rem;
  --text-body: 1rem;
  --text-body-lg: 1.125rem;
  --text-small: 0.875rem;
  --text-micro: 0.75rem;

  /* Espaciado (base 8px) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 40px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 80px;
  --space-10: 96px;
  --space-12: 128px;

  --container-max: 1280px;
  --container-desktop: 1120px;
  --radius-base: 0px;
}

/* ---- Reset mínimo ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: var(--neutro-050);
  color: var(--color-negro);
}
img, svg { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; }
button { font: inherit; }

/* ---- Tipografía base ---- */
body, p {
  font-family: var(--font-primary);
  font-size: var(--text-body);
  font-weight: 400;
  line-height: 1.6;
}
h1, h2, h3, h4 { margin: 0; }

h1, h2, h3 {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: -0.01em;
}
h1 { font-size: var(--text-h1); font-weight: 800; line-height: 1.05; }
h2 { font-size: var(--text-h2); font-weight: 800; line-height: 1.1; }
h3 { font-size: var(--text-h3); font-weight: 700; line-height: 1.2; }
h4 { font-family: var(--font-primary); font-size: var(--text-h4); font-weight: 600; line-height: 1.3; }

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 var(--space-3);
}
.text-small { font-size: var(--text-small); line-height: 1.5; }
.text-mono-small { font-family: var(--font-mono); font-size: var(--text-small); letter-spacing: 0.01em; }

@media (max-width: 639px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.25rem; }
}

/* ---- Enlaces ---- */
a {
  color: var(--color-negro);
  text-decoration: none;
  border-bottom: 1.5px solid var(--color-rojo-bauhaus);
  transition: border-color 0.15s ease, color 0.15s ease;
}
a:hover { color: var(--color-rojo-solido); border-bottom-color: var(--color-negro); }
a:focus-visible { outline: 2px solid var(--color-rojo-solido); outline-offset: 2px; }

/* ---- Accesibilidad ---- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: var(--space-3); top: -100px;
  background: var(--color-negro); color: var(--color-blanco-hueso);
  padding: var(--space-2) var(--space-3); z-index: 1000;
  border-bottom: none; transition: top 0.15s ease;
}
.skip-link:focus { top: var(--space-3); }
:focus-visible { outline: 3px solid var(--color-rojo-solido); outline-offset: 2px; }

/* ---- Contenedor ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}
@media (min-width: 640px) { .container { padding-inline: var(--space-5); } }
@media (min-width: 1024px) { .container { padding-inline: var(--space-6); max-width: var(--container-desktop); } }
@media (min-width: 1440px) { .container { padding-inline: var(--space-7); max-width: var(--container-max); } }

section[id] { scroll-margin-top: 88px; }

/* ---- Wordmark ---- */
.logo-wordmark {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 1.0625rem;
  font-weight: 700;
  border-bottom: none;
  color: var(--color-negro);
  white-space: nowrap;
}
.logo-wordmark:hover { color: var(--color-negro); }
.logo-wordmark__absoluto { font-weight: 400; color: var(--neutro-600); }
.logo-wordmark--footer { color: var(--color-blanco-hueso); font-size: 1.25rem; }
.logo-wordmark--footer .logo-wordmark__absoluto { color: var(--neutro-400); }

/* ---- Botones (una sola familia de forma e intención: negro por defecto, rojo al hover) ---- */
.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: var(--text-body);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border-radius: var(--radius-base);
  cursor: pointer;
  border: 1.5px solid transparent;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn-primary { background-color: var(--color-rojo-solido); color: var(--color-blanco-hueso); border-color: var(--color-rojo-solido); }
.btn-primary:hover { background-color: var(--color-negro); border-color: var(--color-blanco-hueso); color: var(--color-blanco-hueso); }
.btn-primary:active { background-color: #000000; border-color: #000000; color: var(--color-blanco-hueso); }
.btn-primary:disabled { background-color: var(--state-disabled-bg); border-color: var(--state-disabled-bg); color: var(--state-disabled-text); cursor: not-allowed; }

.btn-secondary { background-color: transparent; color: var(--color-negro); border-color: var(--color-negro); }
.btn-secondary:hover { background-color: var(--color-negro); color: var(--color-blanco-hueso); }

.hero .btn-secondary { color: var(--color-blanco-hueso); border-color: var(--color-blanco-hueso); }
.hero .btn-secondary:hover { background-color: var(--color-blanco-hueso); color: var(--color-negro); }

/* ---- Inputs ---- */
.input {
  width: 100%;
  padding: var(--space-3);
  border: 1.5px solid var(--neutro-400);
  border-radius: var(--radius-base);
  background-color: var(--color-blanco-hueso);
  color: var(--color-negro);
  font-family: var(--font-primary);
  font-size: var(--text-body);
}
.input:focus { outline: none; border-color: var(--color-negro); box-shadow: 0 0 0 3px var(--state-focus-ring); }
label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
  color: var(--neutro-700);
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 500;
  background-color: var(--color-blanco-hueso);
  border-bottom: 1px solid var(--neutro-300);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: var(--space-3); gap: var(--space-4); min-height: 64px;
}
.nav-toggle {
  display: flex; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; background: transparent;
  border: 1.5px solid var(--color-negro); cursor: pointer; padding: 0;
}
.nav-toggle__bar { display: block; width: 20px; height: 2px; margin-inline: auto; background-color: var(--color-negro); }

.site-nav {
  display: none; position: absolute; top: 100%; left: 0; right: 0;
  background-color: var(--color-blanco-hueso);
  border-bottom: 1px solid var(--neutro-300);
  padding: var(--space-4) var(--space-3);
}
.site-nav.is-open { display: block; }
.site-nav__list { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); margin-bottom: var(--space-4); }
.site-nav__list a { display: block; border-bottom: none; font-weight: 600; font-size: var(--text-small); letter-spacing: 0.03em; text-transform: uppercase; white-space: nowrap; }
.site-nav__list a:hover, .site-nav__list a:focus-visible, .site-nav__list a[aria-current="true"] { color: var(--color-rojo-solido); }
.nav-cta { width: 100%; }

@media (min-width: 1024px) {
  .nav-toggle { display: none; }
  .site-nav { display: flex; position: static; align-items: center; gap: var(--space-6); border-bottom: none; padding: 0; background: transparent; width: auto; }
  .site-nav__list { flex-direction: row; margin-bottom: 0; }
  .site-nav__list a { border-bottom: 2px solid transparent; padding-bottom: 2px; }
  .site-nav__list a:hover, .site-nav__list a:focus-visible, .site-nav__list a[aria-current="true"] { border-bottom-color: var(--color-rojo-bauhaus); }
}

/* ==========================================================================
   Hero — motivo de marca: el umbral (marco de puerta + arco de giro + solera)
   ========================================================================== */
.hero {
  background-color: var(--color-negro);
  color: var(--color-blanco-hueso);
  padding-block: var(--space-9) var(--space-8);
  overflow: hidden;
}
.hero__inner { display: grid; gap: var(--space-7); }
.hero__eyebrow { color: var(--neutro-400); }
.hero__h1 { color: var(--color-blanco-hueso); margin-bottom: var(--space-4); max-width: 16ch; }
.hero__h1 .hl { color: var(--color-rojo-bauhaus); }
.hero__subheadline { font-size: var(--text-body-lg); color: var(--neutro-200); max-width: 46ch; margin: 0 0 var(--space-5); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }
@media (max-width: 639px) {
  .hero__actions { flex-direction: column; align-items: stretch; }
}
.hero__frame { align-self: end; }
.hero__frame svg { width: 100%; height: auto; }

@media (min-width: 1024px) {
  .hero { padding-block: var(--space-12) var(--space-9); }
  .hero__inner { grid-template-columns: 1.15fr 0.85fr; align-items: end; gap: var(--space-8); }
}

/* ==========================================================================
   Secciones
   ========================================================================== */
.section { padding-block: var(--space-8); }
.section--alt { background-color: var(--color-blanco-hueso); }
.section h2 { margin-bottom: var(--space-5); max-width: 20ch; }
.section__lead { font-size: var(--text-body-lg); color: var(--neutro-600); max-width: 62ch; margin: 0 0 var(--space-6); }

@media (min-width: 1024px) { .section { padding-block: var(--space-12); } }

/* ---- Nosotros: numeral + lista dividida (sin cajas) ---- */
.nosotros__inner { display: grid; gap: var(--space-7); }
.nosotros__stat { border-top: 3px solid var(--color-rojo-bauhaus); padding-top: var(--space-3); }
.nosotros__stat-num { font-family: var(--font-display); font-weight: 800; font-size: 5rem; line-height: 1; display: block; }
.nosotros__stat-label { font-family: var(--font-mono); font-size: var(--text-small); letter-spacing: 0.04em; text-transform: uppercase; color: var(--neutro-600); }
.nosotros__list { list-style: none; margin-top: var(--space-6); }
.nosotros__list li { border-top: 1px solid var(--neutro-300); padding-block: var(--space-4); }
.nosotros__list li:last-child { border-bottom: 1px solid var(--neutro-300); }
.nosotros__list h3 { font-size: var(--text-h4); text-transform: none; margin-bottom: var(--space-2); }
.nosotros__list p { color: var(--neutro-600); margin: 0; }

@media (min-width: 1024px) {
  .nosotros__inner { grid-template-columns: 0.8fr 1.2fr; gap: var(--space-9); }
}

/* ---- Servicios: lista tipo ficha técnica, no tarjetas ---- */
.services-list { list-style: none; border-top: 1px solid var(--neutro-400); }
.service-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--neutro-400);
}
.service-row__index { font-family: var(--font-mono); font-size: var(--text-small); color: var(--neutro-500); }
.service-row h3 { margin-bottom: var(--space-2); }
.service-row > p { color: var(--neutro-700); max-width: 60ch; margin: 0 0 var(--space-3); }
.service-row ul { list-style: none; }
.service-row li {
  position: relative;
  padding-left: var(--space-4);
  font-size: var(--text-small);
  color: var(--neutro-600);
  margin-bottom: var(--space-1);
}
.service-row li::before { content: "\2013"; position: absolute; left: 0; color: var(--neutro-500); }

@media (min-width: 1024px) {
  .service-row { grid-template-columns: 72px 1fr; gap: var(--space-6); }
  .service-row__index { padding-top: var(--space-1); }
}

/* ---- Cómo trabajamos: línea de tiempo ---- */
.timeline { list-style: none; border-left: 2px solid var(--neutro-300); margin-left: 6px; }
.timeline__item { position: relative; padding: 0 0 var(--space-6) var(--space-5); }
.timeline__item::before {
  content: ""; position: absolute; left: -7px; top: 2px;
  width: 12px; height: 12px; background-color: var(--color-rojo-bauhaus);
}
.timeline__num { font-family: var(--font-mono); font-size: var(--text-small); color: var(--neutro-500); display: block; margin-bottom: var(--space-1); }
.timeline__item h3 { font-size: var(--text-h4); text-transform: none; margin-bottom: var(--space-2); }
.timeline__item p { color: var(--neutro-600); margin: 0; max-width: 46ch; }

@media (min-width: 1024px) {
  .timeline { display: grid; grid-template-columns: repeat(4, 1fr); border-left: none; border-top: 2px solid var(--neutro-300); margin-left: 0; column-gap: var(--space-5); }
  .timeline__item { padding: var(--space-5) 0 0; }
  .timeline__item::before { left: 0; top: -7px; }
}

/* ---- Cobertura ---- */
.cobertura__inner { display: grid; gap: var(--space-6); align-items: center; }
.cobertura__mapa { max-width: 380px; margin-inline: auto; }
@media (min-width: 1024px) {
  .cobertura__inner { grid-template-columns: 1fr 1fr; }
  .cobertura__mapa { margin-inline: 0; max-width: none; }
}

/* ---- Contacto ---- */
.contacto__inner { display: grid; gap: var(--space-8); grid-template-columns: 1fr; }
@media (min-width: 1024px) { .contacto__inner { grid-template-columns: 1.4fr 0.6fr; } }
.form { display: grid; grid-template-columns: 1fr; gap: var(--space-4); }
@media (min-width: 640px) {
  .form { grid-template-columns: 1fr 1fr; }
  .form__field--full { grid-column: 1 / -1; }
}
.form__microcopy { color: var(--neutro-600); margin-top: var(--space-4); }

.contacto__directo { border: 1px solid var(--neutro-400); padding: var(--space-5); background-color: var(--color-blanco-hueso); align-self: start; }
.contacto__directo h3 { font-size: var(--text-h4); text-transform: none; margin-bottom: var(--space-4); }
.contacto__whatsapp { width: 100%; margin-bottom: var(--space-4); }
.contacto__datos { list-style: none; display: flex; flex-direction: column; gap: var(--space-2); color: var(--neutro-700); }
.contacto__referencias { margin-top: var(--space-4); color: var(--neutro-600); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background-color: var(--color-negro); color: var(--neutro-300); padding-block: var(--space-8); }
.site-footer__inner { display: flex; flex-direction: column; gap: var(--space-2); }
.site-footer p { margin: 0; }
.site-footer a { color: var(--neutro-100); border-bottom-color: var(--color-rojo-bauhaus); }
.site-footer a:hover { color: var(--color-rojo-bauhaus); border-bottom-color: var(--neutro-100); }
.site-footer__brand { margin-bottom: var(--space-3) !important; }

/* ==========================================================================
   WhatsApp flotante
   ========================================================================== */
.whatsapp-float {
  position: fixed; right: var(--space-4); bottom: var(--space-4); z-index: 600;
  width: 56px; height: 56px; display: flex; align-items: center; justify-content: center;
  background-color: var(--color-negro); border-bottom: none;
  box-shadow: 0 2px 8px rgba(26, 26, 26, 0.35);
}
.whatsapp-float:hover { background-color: var(--color-rojo-solido); }
.whatsapp-float:focus-visible { outline: 3px solid var(--color-rojo-solido); outline-offset: 3px; }
.whatsapp-float__icon { width: 28px; height: 28px; color: var(--color-blanco-hueso); }

/* ==========================================================================
   Movimiento — entrada del hero (el umbral se abre al llegar) y reveal al scroll.
   Único momento de choreography del sitio; todo lo demás es CSS transition simple.
   ========================================================================== */
.hero__eyebrow, .hero__h1, .hero__subheadline, .hero__actions {
  opacity: 0;
  transform: translateY(14px);
}
.hero.is-ready .hero__eyebrow { animation: hero-rise 0.7s cubic-bezier(.22,.61,.36,1) forwards; }
.hero.is-ready .hero__h1 { animation: hero-rise 0.8s cubic-bezier(.22,.61,.36,1) forwards; animation-delay: .12s; }
.hero.is-ready .hero__subheadline { animation: hero-rise 0.7s cubic-bezier(.22,.61,.36,1) forwards; animation-delay: .32s; }
.hero.is-ready .hero__actions { animation: hero-rise 0.7s cubic-bezier(.22,.61,.36,1) forwards; animation-delay: .46s; }
@keyframes hero-rise { to { opacity: 1; transform: translateY(0); } }

.hero__frame .frame-path { opacity: 0; }
.hero.is-ready .hero__frame .frame-path { animation: frame-fade .6s ease forwards; animation-delay: .1s; }
@keyframes frame-fade { to { opacity: 1; } }

.hero__frame .door-arc { opacity: 0; }
.hero.is-ready .hero__frame .door-arc { animation: frame-fade .5s ease forwards; animation-delay: .5s; }

.hero__frame .door-leaf {
  transform-origin: 60px 340px;
  transform: rotate(-45deg);
  opacity: 0;
}
.hero.is-ready .hero__frame .door-leaf {
  animation: door-swing 0.9s cubic-bezier(.34,1.15,.64,1) forwards;
  animation-delay: .55s;
}
@keyframes door-swing {
  0% { opacity: 0; transform: rotate(-45deg); }
  15% { opacity: 1; }
  100% { opacity: 1; transform: rotate(0deg); }
}

.hero__frame .door-hinge { opacity: 0; }
.hero.is-ready .hero__frame .door-hinge { animation: frame-fade .3s ease forwards; animation-delay: 1.4s; }

.hero__frame .threshold {
  transform-origin: 160px 348px;
  transform: scaleX(0);
}
.hero.is-ready .hero__frame .threshold {
  animation: threshold-extend 0.5s cubic-bezier(.22,.61,.36,1) forwards;
  animation-delay: 1.45s;
}
@keyframes threshold-extend { to { transform: scaleX(1); } }

/* Reveal genérico al entrar al viewport (secciones, no cada fila individual) */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Acento sutil en filas de servicio al pasar el mouse */
.service-row { transition: border-color 0.2s ease; }
.service-row__index { transition: color 0.2s ease; }
.service-row:hover { border-color: var(--color-negro); }
.service-row:hover .service-row__index { color: var(--color-rojo-solido); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: 0.001ms !important; }

  .hero__eyebrow, .hero__h1, .hero__subheadline, .hero__actions,
  .hero__frame .frame-path, .hero__frame .door-arc, .hero__frame .door-leaf,
  .hero__frame .door-hinge, .hero__frame .threshold, .reveal {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}