/* ============================================================
   GSA — Sistema de diseño (editorial-arquitectónico)
   Tipografía: Akrobat (cuerpo) · Quentin (firma manuscrita)
   Paleta: estrictamente monocromática (manual oficial)
   ============================================================ */

/* ---------- Fuentes ---------- */
@font-face {
  font-family: 'Akrobat';
  src: url('../fonts/Akrobat-Light.otf') format('opentype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Akrobat';
  src: url('../fonts/Akrobat-Regular.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Akrobat';
  src: url('../fonts/Akrobat-Bold.otf') format('opentype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Quentin';
  src: url('../fonts/Quentin.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* ---------- Tokens ---------- */
:root {
  /* Paleta oficial */
  --gris-1: #464F56;
  --gris-2: #6F7881;
  --gris-3: #9CA5AE;
  --negro:  #231F20;
  --blanco: #FFFFFF;
  --bg-soft: #F5F6F8;
  --border:  #E1E3E6;
  --line-faint: #EDEEF0;

  /* Tipografía */
  --font-body: 'Akrobat', 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  --font-script: 'Quentin', 'Brush Script MT', cursive;

  /* Escala */
  --step--1: clamp(0.83rem, 0.78rem + 0.25vw, 0.94rem);
  --step-0:  clamp(1rem,    0.94rem + 0.31vw, 1.13rem);
  --step-1:  clamp(1.2rem,  1.12rem + 0.39vw, 1.41rem);
  --step-2:  clamp(1.44rem, 1.33rem + 0.5vw,  1.76rem);
  --step-3:  clamp(1.73rem, 1.58rem + 0.71vw, 2.2rem);
  --step-4:  clamp(2.07rem, 1.85rem + 1.04vw, 2.75rem);
  --step-5:  clamp(2.49rem, 2.13rem + 1.69vw, 3.43rem);
  --step-6:  clamp(2.99rem, 2.42rem + 2.67vw, 4.29rem);
  --step-7:  clamp(3.58rem, 2.71rem + 4.1vw,  5.37rem);

  /* Espacio (basado en columna de 8px) */
  --s-1:  4px;
  --s-2:  8px;
  --s-3:  16px;
  --s-4:  24px;
  --s-5:  32px;
  --s-6:  48px;
  --s-7:  64px;
  --s-8:  96px;
  --s-9:  128px;
  --s-10: 160px;

  /* Layout */
  --maxw: 1240px;
  --gutter: clamp(20px, 4vw, 56px);
  --ledger-offset: clamp(32px, 6vw, 96px);

  /* Animación */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
img, svg { display: block; max-width: 100%; height: auto; }
button { font: inherit; cursor: pointer; }

/* ---------- Body ---------- */
body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--step-0);
  line-height: 1.65;
  color: var(--gris-1);
  background: var(--blanco);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--negro); color: var(--blanco); }

/* ---------- La línea de ledger (concepto central) ----------
   Una línea vertical fina recorre el sitio entero del lado
   izquierdo, como el margen rojo de una libreta contable.
   Es nuestro elemento estructural distintivo.
*/
.shell {
  position: relative;
  min-height: 100vh;
}
.shell::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--ledger-offset);
  bottom: 0;
  width: 1px;
  background: var(--line-faint);
  pointer-events: none;
  z-index: 0;
}
@media (max-width: 720px) {
  .shell::before { display: none; }
}

/* ---------- Tipografía ---------- */
h1, h2, h3, h4, h5 {
  color: var(--negro);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.08;
  margin: 0 0 var(--s-4);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gris-2);
  font-weight: 700;
  margin: 0 0 var(--s-4);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--gris-3);
}

.script {
  font-family: var(--font-script);
  font-weight: 400;
  color: var(--gris-2);
  letter-spacing: 0;
  font-style: normal;
}

.signature {
  font-family: var(--font-script);
  color: var(--gris-3);
  font-size: var(--step-2);
  line-height: 1;
  display: inline-block;
  transform: rotate(-3deg);
}

p { margin: 0 0 var(--s-3); }
strong { color: var(--negro); font-weight: 700; }
a { color: var(--negro); text-decoration: none; }
a.inline {
  border-bottom: 1px solid var(--gris-3);
  transition: border-color 0.2s ease;
}
a.inline:hover { border-bottom-color: var(--negro); }

/* ---------- Contenedor ---------- */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  position: relative;
  z-index: 1;
}

/* ---------- Header (navegación principal) ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
  padding: 18px 0;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-brand img {
  height: 36px;
  width: auto;
}
.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: clamp(18px, 3vw, 36px);
  align-items: center;
}
.nav-link {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--gris-1);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--negro);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease-out);
}
.nav-link:hover { color: var(--negro); }
.nav-link:hover::after,
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: var(--negro);
  color: var(--blanco);
  font-size: 13px;
  letter-spacing: 0.06em;
  font-weight: 600;
  text-transform: uppercase;
  transition: background 0.2s ease, transform 0.2s ease;
}
.nav-cta:hover { background: var(--gris-1); transform: translateY(-1px); }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  padding: 10px;
  align-items: center;
  justify-content: center;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--negro);
  position: relative;
  transition: transform 0.25s ease;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after  { top:  7px; }

@media (max-width: 840px) {
  .nav-toggle { display: inline-flex; }
  .nav-list {
    position: fixed;
    top: 72px; left: 0; right: 0;
    background: var(--blanco);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--s-5) var(--gutter);
    gap: var(--s-3);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }
  .nav-list.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-cta { width: 100%; justify-content: center; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: clamp(80px, 14vh, 160px) 0 clamp(80px, 12vh, 140px);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.62fr);
  gap: clamp(32px, 6vw, 96px);
  align-items: end;
}
@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
}
.hero-title {
  font-size: var(--step-7);
  letter-spacing: -0.03em;
  line-height: 0.98;
  margin: 0 0 var(--s-5);
}
.hero-title .accent {
  font-family: var(--font-script);
  font-weight: 400;
  color: var(--gris-2);
  display: inline-block;
  font-size: 0.62em;
  letter-spacing: 0;
  transform: translate(-8px, -0.35em) rotate(-4deg);
  margin-right: -8px;
}
.hero-lede {
  font-size: var(--step-1);
  font-weight: 300;
  color: var(--gris-1);
  max-width: 56ch;
  line-height: 1.45;
  margin: 0 0 var(--s-6);
}
.hero-meta {
  display: flex;
  gap: var(--s-6);
  flex-wrap: wrap;
  align-items: flex-end;
}
.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.hero-meta-num {
  font-size: var(--step-4);
  font-weight: 700;
  color: var(--negro);
  line-height: 1;
  letter-spacing: -0.02em;
}
.hero-meta-label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gris-2);
  font-weight: 600;
}

.hero-aside {
  border-left: 1px solid var(--border);
  padding: var(--s-4) 0 var(--s-4) var(--s-5);
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--s-4);
}
@media (max-width: 880px) {
  .hero-aside { border-left: 0; padding-left: 0; border-top: 1px solid var(--border); padding-top: var(--s-5); }
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 28px;
  background: var(--negro);
  color: var(--blanco);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: transform 0.2s ease, background 0.2s ease;
  border: 0;
  cursor: pointer;
}
.btn:hover { background: var(--gris-1); transform: translateY(-1px); }
.btn .arrow {
  display: inline-flex;
  transition: transform 0.25s var(--ease-out);
}
.btn:hover .arrow { transform: translateX(4px); }

.btn-ghost {
  background: transparent;
  color: var(--negro);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-soft); border-color: var(--gris-3); }

/* ---------- Secciones ---------- */
section { position: relative; padding: clamp(64px, 10vh, 120px) 0; }
section + section { border-top: 1px solid var(--line-faint); }

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
  gap: var(--s-7);
  align-items: end;
  margin-bottom: var(--s-7);
}
@media (max-width: 760px) {
  .section-head { grid-template-columns: 1fr; gap: var(--s-4); }
}
.section-title {
  font-size: var(--step-5);
  margin: 0;
}
.section-intro {
  font-size: var(--step-1);
  font-weight: 300;
  color: var(--gris-1);
  max-width: 54ch;
  margin: 0;
}

/* ---------- Bloque "número grande" (servicios, etc.) ---------- */
.numbered-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.numbered-item {
  background: var(--blanco);
  padding: var(--s-5);
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--s-3);
  align-items: start;
  transition: background 0.2s ease;
  position: relative;
}
.numbered-item:hover { background: var(--bg-soft); }
.numbered-item .num {
  font-size: var(--step-2);
  color: var(--gris-3);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.numbered-item h3 {
  font-size: var(--step-1);
  margin: 0 0 var(--s-2);
  letter-spacing: -0.01em;
}
.numbered-item p {
  font-size: var(--step--1);
  color: var(--gris-2);
  margin: 0;
  line-height: 1.55;
}

/* ---------- Bloque "principios" / featured ---------- */
.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-6);
}
@media (max-width: 800px) {
  .principles { grid-template-columns: 1fr; gap: var(--s-5); }
}
.principle {
  padding-top: var(--s-4);
  border-top: 1px solid var(--negro);
}
.principle-num {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--gris-3);
  margin-bottom: var(--s-3);
}
.principle h3 {
  font-size: var(--step-2);
  margin: 0 0 var(--s-3);
  line-height: 1.15;
}
.principle p {
  font-size: var(--step-0);
  color: var(--gris-1);
  margin: 0;
}

/* ---------- Bloque "recurso destacado" ---------- */
.feature-card {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--s-7);
  align-items: center;
  padding: var(--s-7);
  background: var(--bg-soft);
  border-left: 4px solid var(--negro);
}
@media (max-width: 840px) {
  .feature-card { grid-template-columns: 1fr; padding: var(--s-5); }
}
.feature-card h3 {
  font-size: var(--step-3);
  margin: 0 0 var(--s-3);
  line-height: 1.12;
}
.feature-card p {
  font-size: var(--step-0);
  color: var(--gris-1);
  max-width: 50ch;
}
.feature-card .feature-meta {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gris-3);
  font-weight: 700;
  margin-bottom: var(--s-3);
}

/* ---------- Admin Labs (mención compacta, invertida) ---------- */
.labs {
  background: var(--negro);
  color: var(--gris-3);
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 9vh, 96px) 0;
}
.labs > .wrap { position: relative; z-index: 1; }
.labs .eyebrow { color: var(--gris-3); }
.labs .eyebrow::before { background: var(--gris-2); }

.labs-compact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--s-6);
  align-items: end;
  max-width: 980px;
  margin: 0 auto;
}
@media (max-width: 760px) {
  .labs-compact { grid-template-columns: 1fr; gap: var(--s-4); }
}
.labs-compact p.lede {
  color: var(--gris-3);
  font-size: var(--step-2);
  font-weight: 300;
  line-height: 1.4;
  margin: 0;
  letter-spacing: -0.01em;
  max-width: 38ch;
}
.labs-compact .labs-name {
  color: var(--blanco);
  font-weight: 700;
}
.labs-compact .labs-since {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gris-2);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}
.labs-compact .labs-since::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gris-3);
  box-shadow: 0 0 8px rgba(255,255,255,0.35);
}
.labs-script {
  font-family: var(--font-script);
  color: var(--gris-3);
  font-size: var(--step-3);
  line-height: 1;
  transform: rotate(-3deg);
  display: inline-block;
}

/* ---------- CTA banda ---------- */
.cta-banda {
  background: var(--negro);
  color: var(--blanco);
  padding: clamp(64px, 10vh, 120px) 0;
}
.cta-banda h2 {
  color: var(--blanco);
  font-size: var(--step-5);
  margin: 0 0 var(--s-4);
  max-width: 22ch;
}
.cta-banda p {
  color: var(--gris-3);
  font-size: var(--step-1);
  font-weight: 300;
  max-width: 54ch;
  margin: 0 0 var(--s-5);
}
.cta-banda .btn {
  background: var(--blanco);
  color: var(--negro);
}
.cta-banda .btn:hover { background: var(--gris-3); }
.cta-banda .signature {
  color: var(--gris-2);
  display: block;
  margin-top: var(--s-5);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--blanco);
  padding: var(--s-7) 0 var(--s-5);
  border-top: 1px solid var(--border);
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: var(--s-6);
  margin-bottom: var(--s-6);
}
@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--s-5); }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand img { height: 40px; margin-bottom: var(--s-3); }
.footer-brand p {
  font-size: 13px;
  color: var(--gris-2);
  max-width: 28ch;
}
.footer-col h4 {
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--negro);
  margin: 0 0 var(--s-3);
  font-weight: 700;
}
.footer-col ul {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-col a {
  font-size: 14px;
  color: var(--gris-1);
  transition: color 0.2s ease;
}
.footer-col a:hover { color: var(--negro); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--s-3);
  padding-top: var(--s-4);
  border-top: 1px solid var(--line-faint);
  font-size: 12px;
  color: var(--gris-3);
  letter-spacing: 0.04em;
}
.footer-bottom .signature {
  font-size: var(--step-1);
  color: var(--gris-2);
  transform: none;
}

/* ---------- Animaciones (page load) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  animation: reveal 0.9s var(--ease-out) forwards;
}
.reveal[data-delay="1"] { animation-delay: 0.08s; }
.reveal[data-delay="2"] { animation-delay: 0.18s; }
.reveal[data-delay="3"] { animation-delay: 0.30s; }
.reveal[data-delay="4"] { animation-delay: 0.42s; }
.reveal[data-delay="5"] { animation-delay: 0.55s; }
@keyframes reveal {
  to { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal (JS) */
.scroll-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.scroll-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .scroll-reveal { opacity: 1; transform: none; }
}

/* ---------- Utilidades ---------- */
.muted { color: var(--gris-2); }
.tiny { font-size: 12px; letter-spacing: 0.04em; }
.upper-caps { text-transform: uppercase; letter-spacing: 0.18em; font-size: 11px; font-weight: 700; }