/* Sitio oficial de Alpha Signature. Se carga después de alpha-signature.css (design system)
   y solo usa sus tokens. Tema oscuro de base, según 04-web-y-artifacts.md. */

@font-face { font-family: "Montserrat"; font-weight: 300; font-style: normal; font-display: swap; src: url("/assets/fonts/montserrat/montserrat-light.ttf") format("truetype"); }
@font-face { font-family: "Montserrat"; font-weight: 400; font-style: normal; font-display: swap; src: url("/assets/fonts/montserrat/montserrat-regular.ttf") format("truetype"); }
@font-face { font-family: "Montserrat"; font-weight: 600; font-style: normal; font-display: swap; src: url("/assets/fonts/montserrat/montserrat-semibold.ttf") format("truetype"); }
@font-face { font-family: "Montserrat"; font-weight: 700; font-style: normal; font-display: swap; src: url("/assets/fonts/montserrat/montserrat-bold.ttf") format("truetype"); }

html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { overflow-x: hidden; }
img { max-width: 100%; height: auto; }

.site-muted { color: var(--text-muted); }
.site-link { color: var(--text); text-decoration: none; border-bottom: 1px solid var(--rule); }
.site-link:hover { border-bottom-color: transparent; }

.site-skip {
  position: absolute;
  left: 16px;
  top: -100px;
  z-index: 100;
  padding: 12px 16px;
  background: var(--action);
  color: var(--on-action);
  text-decoration: none;
}
.site-skip:focus { top: 16px; }

/* Progreso de lectura */
.site-progress { position: fixed; inset: 0 0 auto; height: 2px; z-index: 60; pointer-events: none; }
.site-progress span { display: block; height: 100%; width: 100%; background: var(--rule); transform: scaleX(0); transform-origin: left; }

/* Encabezado */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(14, 14, 14, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.site-header__in { display: flex; align-items: center; gap: var(--space-8); min-height: 72px; }
.site-brand { display: block; flex: none; }
.site-brand .as-logo { width: 140px; }
.site-nav { display: flex; gap: var(--space-6); margin-left: auto; }
.site-nav__link {
  color: var(--text-muted);
  font-size: 14px;
  text-decoration: none;
  padding-block: 6px;
  border-bottom: 1px solid transparent;
}
.site-nav__link:hover,
.site-nav__link.is-active { color: var(--text); border-bottom-color: var(--rule); }
.site-header__cta { min-height: 40px; }
.site-menu-toggle {
  display: none;
  margin-left: auto;
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--text);
  font: 400 14px/1 var(--font-sans);
  cursor: pointer;
}

/* Marco editorial */
.site-frame-top {
  display: grid;
  grid-template-columns: var(--size-rail) 1fr auto;
  align-items: center;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--rule);
}

/* Hero */
.site-hero { padding-block: var(--space-12) var(--space-16); }
.site-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.42fr);
  gap: var(--space-12);
  align-items: stretch;
  padding-top: var(--space-16);
}
.site-hero__copy { display: grid; gap: var(--space-6); align-content: start; }
.site-hero__title { font-size: clamp(40px, 6.4vw, 80px); line-height: 1.02; max-width: 16ch; }
.site-hero__lede { color: var(--text-muted); max-width: 56ch; }
.site-hero__mark { position: relative; min-height: 320px; }
.site-hero__pattern { position: absolute; inset: 0; --as-pattern-size: 26px; opacity: 0.55; }

.site-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }

.site-proof {
  list-style: none;
  margin: var(--space-16) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--rule);
}
.site-proof li { display: grid; gap: var(--space-2); align-content: start; padding: var(--space-6) var(--space-6) 0 0; }
.site-proof li + li { padding-left: var(--space-6); border-left: 1px solid var(--border); }
.site-proof strong { font-weight: 600; }
.site-proof span:last-child { color: var(--text-muted); font-size: 14px; }

/* Secciones con retícula de un tercio */
.site-section { padding-block: var(--space-24); border-top: 1px solid var(--border); }
.site-rail-grid {
  display: grid;
  grid-template-columns: var(--size-rail) minmax(0, 1fr);
  gap: var(--space-8);
}
.site-rail { display: grid; gap: var(--space-6); align-content: start; padding-top: var(--space-4); border-top: 1px solid var(--rule); }
.site-content { display: grid; gap: var(--space-6); align-content: start; padding-top: var(--space-4); border-top: 1px solid var(--rule); min-width: 0; }
.site-content .as-headline-1 { max-width: 22ch; }

.site-step {
  font: 300 13px/1 var(--font-sans);
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.site-list { font-size: 15px; color: var(--text-muted); }
.site-list strong { color: var(--text); }

/* Ruta oficial */
.site-route { display: grid; gap: var(--space-8); margin-top: var(--space-12); }
.site-route__head { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); }
.site-route__entry-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(240px, 0.75fr);
  gap: var(--space-12);
  margin-top: var(--space-4);
}
.site-route__entry .as-headline-2 { max-width: 24ch; }
.site-route__meta { padding-top: var(--space-2); }
.site-routemap {
  display: grid;
  gap: var(--space-4);
  align-content: start;
  align-self: start;
  padding: var(--space-6);
  border: 1px solid var(--rule);
}
.site-routemap__list { margin: 0; padding: 0; list-style: none; counter-reset: rm; }
.site-routemap__list li {
  counter-increment: rm;
  display: grid;
  grid-template-columns: 28px 1fr;
  padding: 10px 0;
  border-top: 1px solid var(--border);
  font-size: 15px;
}
.site-routemap__list li::before { content: counter(rm, decimal-leading-zero); color: var(--text-muted); font-weight: 300; font-size: 13px; }
.site-route__decision {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
  text-align: center;
}
.site-route__decision::after,
.site-route__decision span { content: ""; display: block; height: 1px; background: var(--border-strong); }
.site-route__branches { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-5); }
.site-guarantee { margin: 0; padding-top: var(--space-4); border-top: 1px solid var(--rule); color: var(--text-muted); font-size: 15px; }
.site-guarantee strong { color: var(--text); }

/* Capacidades */
.site-practices {
  list-style: none;
  margin: var(--space-12) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--rule);
}
.site-practice {
  display: grid;
  gap: var(--space-3);
  align-content: start;
  padding: var(--space-8) var(--space-6) var(--space-8) 0;
  border-bottom: 1px solid var(--border);
}
.site-practice:not(:nth-child(3n + 1)) { padding-left: var(--space-6); border-left: 1px solid var(--border); }
.site-practice p:last-child { margin: 0; color: var(--text-muted); font-size: 15px; }

/* IA */
.site-ai { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-6); }
.site-ai li { display: grid; gap: var(--space-2); align-content: start; padding-top: var(--space-4); border-top: 1px solid var(--border); }
.site-ai p { margin: 0; }
.site-ai p:last-child { color: var(--text-muted); font-size: 15px; }

/* Método */
.site-method {
  list-style: none;
  margin: var(--space-12) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-6);
}
.site-method li { display: grid; gap: var(--space-3); align-content: start; padding-top: var(--space-4); border-top: 1px solid var(--rule); }
.site-method p { margin: 0; color: var(--text-muted); font-size: 15px; }

/* Confianza */
.site-split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-5); margin-top: var(--space-12); }

/* Founder */
.site-founder__portrait { margin: 0; max-width: 280px; }
.site-founder__portrait img { display: block; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; filter: grayscale(1); border-radius: var(--radius-md); }
.site-founder__meta { padding-top: var(--space-4); border-top: 1px solid var(--border); }

/* FAQ */
.site-faq { border-top: 1px solid var(--border); }
.site-faq__item { border-bottom: 1px solid var(--border); }
.site-faq__item summary {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  font-size: 18px;
  cursor: pointer;
  list-style: none;
}
.site-faq__item summary::-webkit-details-marker { display: none; }
.site-faq__item summary::after { content: "+"; flex: none; color: var(--text-muted); font-weight: 300; }
.site-faq__item[open] summary::after { content: "−"; }
.site-faq__item p { margin: 0 0 var(--space-5); max-width: var(--size-measure); color: var(--text-muted); }

/* Contacto */
.site-next { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-6); }
.site-next li { display: grid; gap: var(--space-2); align-content: start; padding-top: var(--space-4); border-top: 1px solid var(--border); }
.site-next p { margin: 0; font-size: 15px; }
.site-contact__meta { grid-template-columns: repeat(2, max-content); gap: var(--space-4) var(--space-12); }

/* Pie */
.site-footer { padding-block: var(--space-16) var(--space-8); border-top: 1px solid var(--rule); }
.site-footer__logo { width: 180px; }
.site-footer__line { margin-top: var(--space-4); color: var(--text-muted); }
.site-footer__bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2) var(--space-6);
  margin-top: var(--space-12);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
}
.site-footer__bar .site-link { color: var(--text-muted); border-bottom-color: var(--border); }

/* WhatsApp fijo: aparece al pasar el hero */
.site-sticky-whatsapp {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 200ms ease, transform 200ms ease;
}
.site-sticky-whatsapp.is-visible { opacity: 1; pointer-events: auto; transform: none; }

/* Aparición sutil por scroll (solo con JS y sin reduced motion) */
.js-reveal [data-reveal] { opacity: 0; transform: translateY(12px); transition: opacity 500ms ease, transform 500ms ease; }
.js-reveal [data-reveal].is-in { opacity: 1; transform: none; }

@media (max-width: 1000px) {
  .site-practices { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-practice:not(:nth-child(3n + 1)) { padding-left: 0; border-left: 0; }
  .site-practice:nth-child(2n) { padding-left: var(--space-6); border-left: 1px solid var(--border); }
  .site-method { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .site-menu-toggle { display: inline-flex; align-items: center; }
  .site-header__cta { display: none; }
  .site-nav {
    display: none;
    position: absolute;
    inset: 100% 0 auto;
    flex-direction: column;
    gap: 0;
    padding: var(--space-2) 16px var(--space-4);
    background: var(--surface-page);
    border-bottom: 1px solid var(--border);
  }
  .site-nav.is-open { display: flex; }
  .site-nav__link { padding-block: 14px; border-bottom: 1px solid var(--border); font-size: 16px; }
  .site-header__in { position: relative; }

  .site-frame-top { grid-template-columns: 1fr auto; }
  .site-frame-top .as-label:nth-child(2) { display: none; }
  .site-hero__grid { grid-template-columns: 1fr; padding-top: var(--space-12); }
  .site-hero__mark { display: none; }
  .site-proof { grid-template-columns: 1fr; }
  .site-proof li,
  .site-proof li + li { padding: var(--space-5) 0; border-left: 0; border-bottom: 1px solid var(--border); }

  .site-section { padding-block: var(--space-16); }
  .site-rail-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .site-rail { border-top: 0; padding-top: 0; }
  .site-route__entry-grid,
  .site-route__branches,
  .site-split,
  .site-ai,
  .site-next { grid-template-columns: 1fr; }
  .site-founder__portrait { max-width: 240px; }
}

@media (max-width: 600px) {
  .site-content .as-headline-1 { font-size: 30px; }
  .as-statement { font-size: 24px; }
  .site-route__entry .as-headline-2 { font-size: 24px; }
  .site-practices,
  .site-method { grid-template-columns: 1fr; }
  .site-practice,
  .site-practice:nth-child(2n) { padding-left: 0; padding-right: 0; border-left: 0; }
  .site-actions { flex-direction: column; align-items: stretch; }
  .site-actions .as-button { width: 100%; box-sizing: border-box; }
  .site-actions .as-button--text { align-self: flex-start; width: auto; }
  .site-contact__meta { grid-template-columns: 1fr; }
  .site-sticky-whatsapp { left: 16px; right: 16px; bottom: 16px; }
  .as-card--panel { padding: var(--space-6); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .site-sticky-whatsapp,
  .js-reveal [data-reveal] { transition: none; transform: none; }
  .js-reveal [data-reveal] { opacity: 1; }
}