/* ============================================================
   ANTES DE CONSTRUIR — sistema de diseño "cianotipo"
   El universo visual del plano técnico: azul Prusia, retícula
   de dibujo, cotas, códigos de lámina, papel de taller y ámbar
   de cinta topográfica.
   ============================================================ */

@font-face {
  font-family: 'Archivo';
  src: url('/fonts/Archivo-var.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('/fonts/IBMPlexMono-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('/fonts/IBMPlexMono-500.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  /* tinta y papel */
  --azul-950: #061829;
  --azul-900: #0A2440;
  --azul-800: #0D2E52;
  --azul-700: #164573;
  --linea: rgba(146, 190, 235, .20);
  --linea-fuerte: rgba(146, 190, 235, .48);
  --cian: #8FBCE8;
  --hielo: #DCE9F7;
  --papel: #F6F4EE;
  --papel-2: #EDEAE0;
  --borde-papel: #DAD5C6;
  --tinta: #15202C;
  --tinta-2: #4E5D6C;
  --tinta-3: #8A96A3;
  --ambar: #E7A03C;
  --ambar-osc: #B47A1E;
  --ambar-tinta: #1C1206;

  --fuente: 'Archivo', ui-sans-serif, system-ui, sans-serif;
  --mono: 'Plex Mono', ui-monospace, 'Cascadia Mono', monospace;

  --ancho: 1180px;
  --radio: 3px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: auto; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body {
  font-family: var(--fuente);
  font-size: 17px;
  line-height: 1.65;
  color: var(--tinta);
  background: var(--papel);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
::selection { background: var(--ambar); color: var(--ambar-tinta); }

.contenedor { max-width: var(--ancho); margin: 0 auto; padding: 0 24px; }

/* ---------- utilidades tipográficas ---------- */
.eyebrow {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 12.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
}
.display {
  font-weight: 800;
  letter-spacing: -.022em;
  line-height: 1.04;
  text-wrap: balance;
}

/* ---------- retícula de plano (fondos azules) ---------- */
.plano {
  background-color: var(--azul-900);
  background-image:
    linear-gradient(var(--linea) 1px, transparent 1px),
    linear-gradient(90deg, var(--linea) 1px, transparent 1px),
    linear-gradient(rgba(146,190,235,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(146,190,235,.07) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  color: var(--hielo);
}

/* ---------- barra superior ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--azul-950);
  border-bottom: 1px solid var(--linea);
}
.nav-inner {
  max-width: var(--ancho);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #fff;
}
.logo-marca { line-height: 1.05; }
.logo-marca .l1 {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .34em;
  color: var(--cian);
  display: block;
}
.logo-marca .l2 {
  font-weight: 800;
  font-size: 19px;
  letter-spacing: .02em;
  display: block;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
  list-style: none;
}
.nav-links a {
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--hielo);
  border-bottom: 2px solid transparent;
  padding: 4px 0;
}
.nav-links a:hover, .nav-links a:focus-visible { border-bottom-color: var(--ambar); }

/* ---------- botones ---------- */
.btn {
  display: inline-block;
  font-family: var(--fuente);
  font-weight: 700;
  font-size: 16px;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  padding: 14px 26px;
  border-radius: var(--radio);
}
.btn-ambar {
  background: var(--ambar);
  color: var(--ambar-tinta);
  box-shadow: 0 0 0 1px var(--ambar-osc) inset;
}
.btn-ambar:hover, .btn-ambar:focus-visible { background: #F2B356; }
.btn-linea {
  background: transparent;
  color: var(--hielo);
  box-shadow: 0 0 0 1.5px var(--linea-fuerte) inset;
}
.btn-linea:hover, .btn-linea:focus-visible { box-shadow: 0 0 0 1.5px var(--cian) inset; color: #fff; }
.btn-nav { padding: 9px 18px; font-size: 14.5px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--ambar);
  outline-offset: 2px;
}

/* ---------- héroe ---------- */
.heroe { position: relative; overflow: hidden; }
.heroe-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 48px;
  align-items: center;
  padding: 84px 0 64px;
}
.heroe h1 {
  font-size: clamp(38px, 5.4vw, 62px);
  color: #fff;
  margin: 18px 0 20px;
}
.heroe h1 em {
  font-style: normal;
  color: var(--ambar);
}
.heroe .baja {
  font-size: 19px;
  line-height: 1.6;
  color: var(--cian);
  max-width: 54ch;
  margin-bottom: 34px;
}
.heroe .acciones { display: flex; flex-wrap: wrap; gap: 14px; }
.heroe .eyebrow { color: var(--ambar); }

/* cota decorativa bajo el titular */
.cota {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 34px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cian);
  text-transform: uppercase;
}
.cota::before, .cota::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--linea-fuerte);
}
.cota::before { border-left: 1px solid var(--linea-fuerte); height: 9px; background:
  linear-gradient(var(--linea-fuerte), var(--linea-fuerte)) center / 100% 1px no-repeat; }
.cota::after { border-right: 1px solid var(--linea-fuerte); height: 9px; background:
  linear-gradient(var(--linea-fuerte), var(--linea-fuerte)) center / 100% 1px no-repeat; }

.heroe-figura { min-width: 0; }
.heroe-figura svg { width: 100%; height: auto; }

/* rótulo tipo cajetín de plano */
.rotulo {
  border-top: 1px solid var(--linea);
  background: var(--azul-950);
}
.rotulo-inner {
  max-width: var(--ancho);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
}
.rotulo .celda {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cian);
  padding: 12px 22px 12px 0;
  margin-right: 22px;
  border-right: 1px solid var(--linea);
}
.rotulo .celda b { color: #fff; font-weight: 500; }
.rotulo .celda:last-child { border-right: 0; margin-right: 0; }

/* ---------- secciones papel ---------- */
.seccion { padding: 88px 0; }
.seccion-alt { background: var(--papel-2); }
.seccion .eyebrow { color: var(--ambar-osc); }
.seccion h2 {
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.08;
  margin: 14px 0 14px;
  text-wrap: balance;
}
.seccion .intro { color: var(--tinta-2); font-size: 18px; max-width: 62ch; }

/* manifiesto */
.manifiesto { display: grid; grid-template-columns: 1.2fr .8fr; gap: 56px; align-items: start; }
.manifiesto blockquote {
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 600;
  letter-spacing: -.015em;
  line-height: 1.32;
  text-wrap: balance;
}
.manifiesto blockquote strong { color: var(--ambar-osc); font-weight: 800; }
.claves { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--borde-papel); }
.clave { padding: 18px 0; border-bottom: 1px solid var(--borde-papel); display: flex; gap: 16px; align-items: baseline; }
.clave .num { font-family: var(--mono); font-weight: 500; font-size: 13px; color: var(--ambar-osc); white-space: nowrap; }
.clave p { color: var(--tinta-2); font-size: 15.5px; line-height: 1.5; }
.clave p b { color: var(--tinta); }

/* ---------- láminas de servicios ---------- */
.laminas {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 44px;
}
.lamina {
  position: relative;
  background: #fff;
  border: 1px solid var(--borde-papel);
  padding: 26px 24px 24px;
  border-radius: var(--radio);
}
/* marcas de registro en las esquinas */
.lamina::before, .lamina::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  pointer-events: none;
}
.lamina::before { top: 7px; left: 7px; border-top: 1.5px solid var(--ambar); border-left: 1.5px solid var(--ambar); }
.lamina::after { bottom: 7px; right: 7px; border-bottom: 1.5px solid var(--ambar); border-right: 1.5px solid var(--ambar); }
.lamina .codigo {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--ambar-osc);
  display: block;
  margin-bottom: 12px;
}
.lamina h3 { font-size: 20px; font-weight: 800; letter-spacing: -.01em; margin-bottom: 8px; }
.lamina > p { color: var(--tinta-2); font-size: 15px; line-height: 1.55; margin-bottom: 14px; }
.lamina ul { list-style: none; }
.lamina li {
  font-size: 13.5px;
  font-family: var(--mono);
  color: var(--tinta-2);
  padding: 5px 0 5px 18px;
  position: relative;
  border-top: 1px dashed var(--borde-papel);
}
.lamina li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 8px;
  height: 8px;
  border: 1.5px solid var(--ambar);
}

/* ---------- pasos ---------- */
.pasos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 44px; }
.paso { position: relative; padding-top: 22px; }
.paso .marcador {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border: 2px solid var(--ambar);
  border-radius: 50%;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 16px;
  color: var(--ambar-osc);
  background: #fff;
  margin-bottom: 18px;
}
.paso h3 { font-size: 20px; font-weight: 800; margin-bottom: 8px; letter-spacing: -.01em; }
.paso p { color: var(--tinta-2); font-size: 15.5px; }
.paso::before {
  content: "";
  position: absolute;
  top: 47px;
  left: 62px;
  right: -12px;
  border-top: 1px dashed var(--borde-papel);
}
.paso:last-child::before { display: none; }

/* ---------- banda guía (azul) ---------- */
.banda-guia { color: var(--hielo); }
.banda-guia .inner {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 48px;
  align-items: center;
  padding: 74px 0;
}
.banda-guia h2 { color: #fff; font-size: clamp(26px, 3.2vw, 38px); font-weight: 800; letter-spacing: -.02em; line-height: 1.12; margin: 14px 0 12px; text-wrap: balance; }
.banda-guia p { color: var(--cian); font-size: 17px; max-width: 56ch; }
.banda-guia .eyebrow { color: var(--ambar); }
.banda-guia .der { display: flex; justify-content: flex-end; }

/* ---------- confianza ---------- */
.confianza { display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; margin-top: 44px; }
.confianza h3 { font-size: 18px; font-weight: 800; margin: 14px 0 8px; }
.confianza p { color: var(--tinta-2); font-size: 15px; }
.confianza .glifo {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border: 1.5px solid var(--tinta);
  border-radius: var(--radio);
}

/* ---------- formulario ---------- */
.form-caja {
  position: relative;
  background: #fff;
  border: 1px solid var(--borde-papel);
  border-radius: var(--radio);
  padding: 44px;
  margin-top: 44px;
}
.form-caja::before, .form-caja::after {
  content: "";
  position: absolute;
  width: 18px; height: 18px;
  pointer-events: none;
}
.form-caja::before { top: 9px; left: 9px; border-top: 2px solid var(--ambar); border-left: 2px solid var(--ambar); }
.form-caja::after { bottom: 9px; right: 9px; border-bottom: 2px solid var(--ambar); border-right: 2px solid var(--ambar); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 24px; }
.campo { display: flex; flex-direction: column; gap: 7px; }
.campo-full { grid-column: 1 / -1; }
.campo label { font-weight: 700; font-size: 14.5px; }
.campo label .opt { font-weight: 400; color: var(--tinta-3); }
.campo input, .campo select, .campo textarea {
  font-family: var(--fuente);
  font-size: 16px;
  color: var(--tinta);
  background: var(--papel);
  border: 1px solid var(--borde-papel);
  border-radius: var(--radio);
  padding: 12px 14px;
}
.campo textarea { min-height: 120px; resize: vertical; }
.servicios-check { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.servicios-check label {
  display: flex; align-items: center; gap: 9px;
  font-size: 14px; font-weight: 600;
  background: var(--papel);
  border: 1px solid var(--borde-papel);
  border-radius: var(--radio);
  padding: 10px 12px;
  cursor: pointer;
}
.servicios-check input { accent-color: var(--ambar-osc); width: 16px; height: 16px; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: 13.5px; color: var(--tinta-2); }
.consent input { margin-top: 3px; accent-color: var(--ambar-osc); }
.form-envio { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.form-nota { font-family: var(--mono); font-size: 12px; color: var(--tinta-3); }
.hp { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }

/* ---------- pie ---------- */
.pie { color: var(--cian); }
.pie-inner {
  max-width: var(--ancho);
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 40px;
}
.pie .lema { margin-top: 14px; font-size: 15px; max-width: 44ch; }
.pie nav { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.pie nav a { color: var(--hielo); text-decoration: none; font-size: 15px; border-bottom: 1px solid transparent; }
.pie nav a:hover, .pie nav a:focus-visible { border-bottom-color: var(--ambar); }
.pie-legal {
  border-top: 1px solid var(--linea);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.pie-legal .inner {
  max-width: var(--ancho);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  justify-content: space-between;
}

/* ---------- páginas de artículo / interiores ---------- */
.cabecera-int { padding: 64px 0 48px; }
.cabecera-int h1 { font-size: clamp(30px, 4.4vw, 48px); color: #fff; margin: 16px 0 14px; }
.cabecera-int .baja { color: var(--cian); font-size: 18px; max-width: 62ch; }
.cabecera-int .eyebrow { color: var(--ambar); }
.articulo { max-width: 760px; margin: 0 auto; padding: 64px 24px 80px; }
.articulo h2 { font-size: 26px; font-weight: 800; letter-spacing: -.015em; margin: 44px 0 12px; }
.articulo h2 .codigo { font-family: var(--mono); font-size: 14px; font-weight: 500; letter-spacing: .18em; color: var(--ambar-osc); display: block; margin-bottom: 6px; }
.articulo h3 { font-size: 19px; font-weight: 700; margin: 28px 0 8px; }
.articulo p { margin: 0 0 16px; }
.articulo p, .articulo li { color: #2C3A47; }
.articulo ul, .articulo ol { padding-left: 24px; margin: 0 0 16px; }
.articulo li { margin: 6px 0; }
.articulo .twrap { overflow-x: auto; margin: 24px 0; border: 1px solid var(--borde-papel); border-radius: var(--radio); }
.articulo table { border-collapse: collapse; width: 100%; font-size: 14.5px; background: #fff; }
.articulo th { font-family: var(--mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: .1em; text-align: left; padding: 10px 14px; background: var(--papel-2); border-bottom: 1px solid var(--borde-papel); }
.articulo td { padding: 10px 14px; border-bottom: 1px solid var(--borde-papel); vertical-align: top; }
.articulo tr:last-child td { border-bottom: 0; }
.articulo .cta-inline {
  background: var(--azul-900);
  color: var(--hielo);
  padding: 28px;
  border-radius: var(--radio);
  margin: 36px 0;
}
.articulo .cta-inline p { color: var(--cian); margin: 8px 0 18px; }
.articulo .cta-inline h3 { color: #fff; margin: 0; }
.aviso {
  border-left: 3px solid var(--ambar);
  background: #fff;
  padding: 14px 18px;
  font-size: 15px;
  color: var(--tinta-2);
  margin: 20px 0;
}

/* tarjetas del hub de guías */
.guias-lista { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin: 44px 0; }
.guia-card {
  background: #fff;
  border: 1px solid var(--borde-papel);
  border-radius: var(--radio);
  padding: 26px;
  text-decoration: none;
  display: block;
  position: relative;
}
.guia-card:hover h3, .guia-card:focus-visible h3 { color: var(--ambar-osc); }
.guia-card .codigo { font-family: var(--mono); font-size: 12px; letter-spacing: .18em; color: var(--ambar-osc); }
.guia-card h3 { font-size: 20px; font-weight: 800; margin: 10px 0 8px; letter-spacing: -.01em; }
.guia-card p { color: var(--tinta-2); font-size: 15px; }
.guia-card.prox { opacity: .62; }
.guia-card .prox-tag { font-family: var(--mono); font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--tinta-3); }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .heroe-grid { grid-template-columns: 1fr; padding: 56px 0 48px; }
  .heroe-figura { max-width: 560px; }
  .manifiesto { grid-template-columns: 1fr; gap: 36px; }
  .laminas { grid-template-columns: repeat(2, 1fr); }
  .pasos { grid-template-columns: 1fr; gap: 30px; }
  .paso::before { display: none; }
  .banda-guia .inner { grid-template-columns: 1fr; gap: 28px; }
  .banda-guia .der { justify-content: flex-start; }
  .confianza { grid-template-columns: 1fr; gap: 28px; }
  .form-grid { grid-template-columns: 1fr; }
  .servicios-check { grid-template-columns: 1fr 1fr; }
  .pie-inner { grid-template-columns: 1fr; }
  .guias-lista { grid-template-columns: 1fr; }
  .nav-links { gap: 16px; }
  .nav-links .solo-desktop { display: none; }
}
@media (max-width: 560px) {
  .laminas { grid-template-columns: 1fr; }
  .servicios-check { grid-template-columns: 1fr; }
  .form-caja { padding: 28px 20px; }
  .rotulo .celda { border-right: 0; padding: 6px 0; }
}