/* =====================================================================
   Black Magic Company · portada
   Paleta y tipografías: dirección visual BMC v0.3 (valores observados,
   provisionales hasta que exista una paleta HEX normativa).
   Fuentes autoalojadas, SIL Open Font License (ver fonts/LICENCIAS.txt).
   ===================================================================== */

@font-face { font-family: "Space Grotesk"; src: url("../fonts/space-grotesk.woff2") format("woff2"); font-weight: 300 700; font-display: swap; }
@font-face { font-family: "Inter"; src: url("../fonts/inter.woff2") format("woff2"); font-weight: 100 900; font-display: swap; }
@font-face { font-family: "Cormorant Garamond"; src: url("../fonts/cormorant-italic.woff2") format("woff2"); font-weight: 300 700; font-style: italic; font-display: swap; }

:root {
  --negro: #0A0C10;
  --carbon: #0E121A;
  --carbon-2: #151A23;
  --marfil: #F5F4EF;
  --marfil-2: #EBE8DF;
  --oro: #C8A566;
  --oro-claro: #E2CC94;
  --oro-texto: #7A5E2E;            /* oro legible sobre marfil */
  --tinta: #16181D;
  --gris: #5B5D61;
  --gris-claro: #A3A6AD;
  --barra: #E9E4D6;                /* barras de censura de la cita */

  --f-titulo: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --f-texto: "Inter", "Segoe UI", system-ui, sans-serif;
  --f-cita: "Cormorant Garamond", Georgia, "Times New Roman", serif;

  --gutter: clamp(16px, 5vw, 72px);
  --ancho: 1240px;
  --curva: cubic-bezier(.7, 0, .2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--carbon);
  color: var(--marfil);
  font: 400 1rem/1.65 var(--f-texto);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
h1, h2, h3, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; }
::selection { background: var(--oro); color: var(--negro); }
:focus-visible { outline: 2px solid var(--oro); outline-offset: 4px; }

.saltar {
  position: absolute; left: 12px; top: -60px; z-index: 50;
  background: var(--oro); color: var(--negro); padding: .6rem 1rem;
  font: 600 .8rem var(--f-titulo); text-decoration: none;
}
.saltar:focus { top: 12px; }

.marco { width: min(var(--ancho), 100% - 2 * var(--gutter)); margin-inline: auto; }

/* ------------------------------------------------------------ cabecera */

.cabecera {
  position: fixed; inset: 0 0 auto 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 18px var(--gutter);
  transition: background-color .5s ease, border-color .5s ease, padding .5s ease;
  border-bottom: 1px solid transparent;
}
.cabecera-logo { display: block; width: 104px; opacity: 0; transform: translateY(-6px); pointer-events: none; transition: opacity .5s ease, transform .5s ease; }
.cabecera-nav { display: flex; gap: clamp(14px, 2vw, 30px); margin-left: auto; }
.cabecera-nav a {
  font: 500 .7rem/1 var(--f-titulo); letter-spacing: .18em; text-transform: uppercase;
  color: rgba(245, 244, 239, .62); text-decoration: none; padding: 8px 0; position: relative;
  transition: color .3s ease;
}
.cabecera-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 1px;
  background: var(--oro); transform: scaleX(0); transform-origin: left; transition: transform .4s var(--curva);
}
.cabecera-nav a:hover, .cabecera-nav a.activo { color: var(--marfil); }
.cabecera-nav a:hover::after, .cabecera-nav a.activo::after { transform: scaleX(1); }

.pasado .cabecera {
  background: rgba(10, 12, 16, .84);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border-bottom-color: rgba(200, 165, 102, .16);
  padding-block: 12px;
}
.pasado .cabecera-logo { opacity: 1; transform: none; pointer-events: auto; }

/* ---------------------------------------------------------------- hero */

.hero {
  position: relative; isolation: isolate;
  min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center;
  background: var(--negro) url("../img/textura.webp") center / cover no-repeat;
  overflow: hidden;
}
.hero::before {               /* oscurece la textura y concentra la luz */
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(120% 90% at 72% 38%, rgba(14, 18, 26, .35) 0%, rgba(10, 12, 16, .86) 62%, rgba(10, 12, 16, .97) 100%);
}
.red { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }

.hero-marco {
  width: min(var(--ancho), 100% - 2 * var(--gutter)); margin-inline: auto;
  display: grid; grid-template-columns: minmax(170px, 3.2fr) 8.8fr;
  column-gap: clamp(40px, 6vw, 112px); row-gap: 40px; align-items: center;
  padding-block: 128px 136px;
}
.hero-marca { align-self: center; }
.hero-marca img { width: min(100%, 300px); filter: drop-shadow(0 18px 40px rgba(0, 0, 0, .55)); }

.hero-cita blockquote p {
  font: italic 500 clamp(1.8rem, 1.05rem + 2.85vw, 3.65rem)/1.13 var(--f-cita);
  color: var(--marfil); letter-spacing: -.005em; text-wrap: balance;
  max-width: 21em;
}
.acento { font-style: italic; color: var(--oro-claro); }

.hero-cita figcaption {
  display: flex; align-items: center; gap: 14px; margin-top: 30px;
  font: 500 .74rem/1 var(--f-titulo); letter-spacing: .24em; text-transform: uppercase; color: var(--gris-claro);
}
.hero-cita figcaption::before { content: ""; width: 40px; height: 1px; background: var(--oro); }
.cita-original {
  margin-top: 18px; max-width: 64ch;
  font: 400 .8rem/1.6 var(--f-texto); color: rgba(245, 244, 239, .56);
}
.bajada {
  grid-column: 2;
  display: flex; align-items: center; gap: 16px;
  font: 500 .76rem/1.5 var(--f-titulo); letter-spacing: .22em; text-transform: uppercase; color: var(--oro);
}
.bajada::before { content: ""; width: 10px; height: 10px; border: 1px solid var(--oro); transform: rotate(45deg); flex: none; }

.hero-bajar {
  position: absolute; left: var(--gutter); bottom: 26px;
  display: flex; align-items: center; gap: 14px; text-decoration: none;
  font: 500 .68rem/1 var(--f-titulo); letter-spacing: .26em; text-transform: uppercase; color: rgba(245, 244, 239, .55);
}
.hero-bajar i { position: relative; display: block; width: 1px; height: 44px; background: rgba(245, 244, 239, .18); overflow: hidden; }
.hero-bajar i::after { content: ""; position: absolute; left: 0; top: -40%; width: 1px; height: 40%; background: var(--oro); animation: caida 2.4s var(--curva) infinite; }
@keyframes caida { to { top: 100%; } }

/* Revelado de la cita: barras de censura que se retiran (sólo con JS). */
.js .r {
  color: transparent;
  background: linear-gradient(var(--barra), var(--barra)) no-repeat 100% 58% / 100% .9em;
  -webkit-box-decoration-break: clone; box-decoration-break: clone;
  transition:
    background-size 1s var(--curva) calc(var(--i) * .34s + .2s),
    color .5s ease calc(var(--i) * .34s + .55s);
}
.js .r .acento { color: transparent; transition: color .5s ease calc(var(--i) * .34s + .7s); }
.js .r.vista { color: var(--marfil); background-size: 0% .9em; }
.js .r.vista .acento { color: var(--oro-claro); }

.js .hero-cita figcaption, .js .cita-original, .js .bajada, .js .hero-bajar {
  opacity: 0; transform: translateY(8px); transition: opacity 1s ease, transform 1s ease;
}
.js .hero.revelada .hero-cita figcaption { opacity: 1; transform: none; transition-delay: .1s; }
.js .hero.revelada .cita-original { opacity: 1; transform: none; transition-delay: .35s; }
.js .hero.revelada .bajada { opacity: 1; transform: none; transition-delay: .6s; }
.js .hero.revelada .hero-bajar { opacity: 1; transform: none; transition-delay: 1s; }

/* ----------------------------------------------------------- secciones */

.seccion { position: relative; padding-block: clamp(88px, 11vw, 168px); }
.seccion.claro { background: var(--marfil); color: var(--tinta); }
.seccion.oscuro { background: var(--carbon); color: var(--marfil); }
.seccion.oscuro + .seccion.oscuro { border-top: 1px solid rgba(200, 165, 102, .14); }

.seccion .marco { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: clamp(16px, 2.4vw, 32px); }
.seccion-cabeza { grid-column: 1 / span 3; align-self: start; position: sticky; top: 104px; }
.seccion-cuerpo { grid-column: 4 / -1; min-width: 0; }

.seccion-n {
  display: flex; align-items: center; gap: 12px; margin-bottom: 18px;
  font: 500 .74rem/1 var(--f-titulo); letter-spacing: .2em; color: var(--oro);
}
.seccion-n::after { content: ""; width: 32px; height: 1px; background: currentColor; opacity: .7; }
.claro .seccion-n { color: var(--oro-texto); }
.seccion-cabeza h2 { font: 600 clamp(1.5rem, 1.05rem + 1.35vw, 2.25rem)/1.1 var(--f-titulo); letter-spacing: -.012em; }

.lead {
  font: 400 clamp(1.3rem, .98rem + 1.25vw, 2.05rem)/1.32 var(--f-titulo); letter-spacing: -.01em;
  max-width: 32ch; text-wrap: balance;
}
.lead + * { margin-top: clamp(40px, 5vw, 64px); }
.parrafo { max-width: 60ch; font-size: 1.04rem; line-height: 1.75; }
.parrafo + .parrafo { margin-top: 1.1em; }
.oscuro .parrafo { color: rgba(245, 244, 239, .76); }
.claro .parrafo { color: #3A3D44; }

h3 { font: 600 1.16rem/1.25 var(--f-titulo); letter-spacing: -.005em; }
.oscuro p:not(.lead) { color: rgba(245, 244, 239, .74); }
.claro p:not(.lead) { color: #3A3D44; }

/* contraste A / B */
.contraste { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid rgba(22, 24, 29, .16); }
.contraste-col { padding: 34px clamp(20px, 3vw, 48px) 8px 0; }
.contraste-col + .contraste-col { padding-left: clamp(20px, 3vw, 48px); border-left: 1px solid rgba(22, 24, 29, .16); }
.oscuro .contraste { border-top-color: rgba(245, 244, 239, .14); }
.oscuro .contraste-col + .contraste-col { border-left-color: rgba(245, 244, 239, .14); border-top-color: rgba(245, 244, 239, .14); }
.contraste-n { display: block; margin-bottom: 18px; font: italic 500 2.6rem/1 var(--f-cita); color: var(--oro-texto); }
.oscuro .contraste-n { color: var(--oro); }
.contraste-col h3 { margin-bottom: 12px; font-size: clamp(1.16rem, 1rem + .5vw, 1.45rem); }
.contraste-col p { max-width: 44ch; }

.formula {
  margin-top: clamp(56px, 7vw, 96px);
  display: flex; flex-wrap: wrap; align-items: center; gap: .1em .55em;
  font: 500 clamp(1.5rem, .9rem + 2.6vw, 3.1rem)/1.1 var(--f-titulo); letter-spacing: -.02em; text-transform: uppercase;
}
.formula-flecha { color: var(--oro-texto); font-weight: 300; }
.oscuro .formula-flecha { color: var(--oro); }

/* aparte (origen del nombre) */
.aparte { margin-top: clamp(48px, 6vw, 80px); max-width: 58ch; padding: 4px 0 4px 28px; border-left: 1px solid var(--oro); }
.aparte-titulo { margin-bottom: 14px; font: 500 .72rem/1 var(--f-titulo) !important; letter-spacing: .22em; text-transform: uppercase; color: var(--oro) !important; }
.claro .aparte-titulo { color: var(--oro-texto) !important; }
.aparte p + p { margin-top: .9em; }
.aparte .acento { font-family: var(--f-cita); font-size: 1.4em; font-weight: 500; color: var(--oro-claro); line-height: 1.2; }
.claro .aparte .acento { color: var(--oro-texto); }

/* capas del método */
.capas { counter-reset: capa; border-top: 1px solid rgba(22, 24, 29, .16); }
.oscuro .capas { border-top-color: rgba(245, 244, 239, .14); }
.capa {
  display: grid; grid-template-columns: 72px minmax(160px, 1fr) minmax(0, 1.5fr); gap: 8px 24px; align-items: baseline;
  padding: 28px 0; border-bottom: 1px solid rgba(22, 24, 29, .16);
  position: relative;
}
.oscuro .capa { border-bottom-color: rgba(245, 244, 239, .14); }
.capa::before {          /* la capa crece: cuanto más alta, más ancha la línea */
  content: ""; position: absolute; left: 0; bottom: -1px; height: 1px; width: calc(25% * var(--k, 1));
  background: var(--oro-texto);
}
.capa:nth-child(1) { --k: 1; } .capa:nth-child(2) { --k: 2; } .capa:nth-child(3) { --k: 3; } .capa:nth-child(4) { --k: 4; }
.oscuro .capa::before { background: var(--oro); }
.capa-n { font: italic 500 2rem/1 var(--f-cita); color: var(--oro-texto); }
.oscuro .capa-n { color: var(--oro); }
.capa p { max-width: 52ch; }

/* ciclo operativo */
.secuencia { margin-top: clamp(56px, 7vw, 88px); }
.secuencia-titulo { margin-bottom: 26px; font: 500 .72rem/1 var(--f-titulo) !important; letter-spacing: .22em; text-transform: uppercase; color: var(--oro-texto) !important; }
.oscuro .secuencia-titulo { color: var(--oro) !important; }
.secuencia-pasos { display: grid; grid-template-columns: repeat(4, 1fr); position: relative; }
.secuencia-pasos::before { content: ""; position: absolute; left: 6px; right: 0; top: 6px; height: 1px; background: currentColor; opacity: .22; }
.secuencia-pasos li { position: relative; padding-top: 30px; font: 500 clamp(1.05rem, .9rem + .5vw, 1.35rem)/1.2 var(--f-titulo); }
.paso-punto { position: absolute; left: 0; top: 0; width: 13px; height: 13px; border: 1px solid var(--oro-texto); background: var(--marfil); transform: rotate(45deg); }
.oscuro .paso-punto { border-color: var(--oro); background: var(--carbon); }
.secuencia-pasos li:last-child .paso-punto { background: var(--oro-texto); }
.oscuro .secuencia-pasos li:last-child .paso-punto { background: var(--oro); }
.secuencia-nota { margin-top: 22px; font: italic 500 1.15rem/1.3 var(--f-cita); color: var(--gris) !important; }
.oscuro .secuencia-nota { color: var(--gris-claro) !important; }

/* grupos de capacidades */
.grupos { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px clamp(24px, 3.4vw, 56px); }
.grupo { border-top: 1px solid var(--oro); padding-top: 22px; }
.grupo h3 { margin-bottom: 14px; color: var(--oro-claro); }
.claro .grupo h3 { color: var(--oro-texto); }
.grupo li { padding: 11px 0; border-bottom: 1px solid rgba(245, 244, 239, .1); font-size: .98rem; color: rgba(245, 244, 239, .82); }
.claro .grupo li { border-bottom-color: rgba(22, 24, 29, .1); color: #3A3D44; }

/* principios */
.principios { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(36px, 5vw, 64px) clamp(28px, 4vw, 64px); }
.principio h3 { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-size: clamp(1.2rem, 1rem + .6vw, 1.5rem); }
.principio h3::before { content: ""; width: 9px; height: 9px; background: var(--oro-texto); transform: rotate(45deg); flex: none; }
.oscuro .principio h3::before { background: var(--oro); }
.principio p { max-width: 46ch; }

/* acceso de clientes */
.acceso { display: grid; grid-template-columns: 1fr minmax(240px, 380px); gap: clamp(32px, 5vw, 80px); align-items: center; }
.acceso-texto p { max-width: 44ch; font: 400 clamp(1.15rem, 1rem + .55vw, 1.45rem)/1.45 var(--f-titulo); color: var(--marfil) !important; }
.estado, .boton {
  display: inline-flex; align-items: center; gap: 12px; margin-top: 34px; padding: 13px 20px;
  border: 1px solid rgba(200, 165, 102, .55);
  font: 500 .72rem/1 var(--f-titulo); letter-spacing: .2em; text-transform: uppercase; color: var(--oro-claro); text-decoration: none;
}
.boton { background: var(--oro); color: var(--negro); border-color: var(--oro); transition: background-color .3s ease; }
.boton:hover { background: var(--oro-claro); }
.estado-punto { width: 7px; height: 7px; border-radius: 50%; background: var(--oro); animation: latido 2.4s ease-in-out infinite; }
@keyframes latido { 50% { opacity: .25; } }

.expediente {
  position: relative; padding: 34px 30px 30px;
  background: var(--carbon-2); border: 1px solid rgba(200, 165, 102, .2);
  display: grid; gap: 13px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, .35);
}
.expediente::before { content: ""; position: absolute; inset: 8px; border: 1px solid rgba(245, 244, 239, .05); pointer-events: none; }
.expediente span { display: block; height: 9px; width: var(--w); background: rgba(245, 244, 239, .1); }
.expediente span:nth-child(3n + 1) { background: var(--barra); opacity: .88; }
.expediente-sello {
  justify-self: end; margin-bottom: 10px; padding: 7px 12px; border: 1px solid var(--oro);
  font: 600 .64rem/1 var(--f-titulo) !important; letter-spacing: .3em; text-transform: uppercase; color: var(--oro) !important;
  transform: rotate(-3deg);
}

/* ------------------------------------------------------------------ pie */

.pie { background: var(--negro); border-top: 1px solid rgba(200, 165, 102, .14); padding-block: 56px 48px; }
.pie-marco { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 28px; }
.pie-logo { width: 150px; }
.pie-datos { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; font-size: .86rem; color: var(--gris-claro); }
.pie-datos a { color: var(--marfil); text-decoration: none; border-bottom: 1px solid rgba(200, 165, 102, .5); padding-bottom: 2px; }
.pie-datos a:hover { border-bottom-color: var(--oro); }

/* ------------------------------------------------------ entrada en scroll */

.js .aparecer { opacity: 0; transform: translateY(16px); transition: opacity .9s ease, transform .9s var(--curva); }
.js .aparecer.visto { opacity: 1; transform: none; }

/* ------------------------------------------------------------ responsivo */

@media (min-width: 1100px) {
  .grupos { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  .hero-marco { grid-template-columns: 1fr; padding-block: 112px 120px; row-gap: 36px; }
  .hero-marca img { width: 200px; }
  .bajada { grid-column: 1; }
  .seccion-cabeza { grid-column: 1 / -1; position: static; margin-bottom: 40px; }
  .seccion-cuerpo { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .cabecera-nav { display: none; }
  .cabecera-logo { width: 88px; }
  .contraste { grid-template-columns: 1fr; }
  .contraste-col { padding-right: 0; }
  .contraste-col + .contraste-col { padding-left: 0; border-left: 0; border-top: 1px solid rgba(22, 24, 29, .16); }
  .capa { grid-template-columns: 52px 1fr; }
  .capa p { grid-column: 2; }
  .secuencia-pasos { grid-template-columns: 1fr 1fr; row-gap: 30px; }
  .secuencia-pasos::before { display: none; }
  .grupos, .principios, .acceso { grid-template-columns: 1fr; }
  .pie-datos { align-items: flex-start; }
}

@media (max-width: 420px) {
  .hero-marca img { width: 164px; }
  .hero-cita figcaption { letter-spacing: .18em; }
  .bajada { letter-spacing: .16em; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js .aparecer, .js .hero-cita figcaption, .js .cita-original, .js .bajada, .js .hero-bajar { opacity: 1; transform: none; }
  .js .r { color: var(--marfil); background-size: 0 0; }
  .js .r .acento { color: var(--oro-claro); }
}