/* ==========================================================================
   NEXIA Systems — Hoja de estilos v1.0
   Paleta: marfil #F7F5F2 · antracita #0F1115 · texto #111111 · acento #0E8F8F
   Tipografía: Cormorant Garamond (titulares) · Inter (texto)
   ========================================================================== */

:root{
  --ink:#111111;
  --ink-soft:#4a4842;
  --ink-mute:#8a877f;
  --paper:#F7F5F2;
  --paper-line:#E6E3DC;
  --night:#0F1115;
  --night-line:#23262c;
  --night-text:#F4F2ED;
  --night-soft:#b9bbbf;
  --night-mute:#8b8e94;
  --accent:#0E8F8F;
  --serif:'Cormorant Garamond',Georgia,serif;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  --measure:34rem;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  font-size:1.0625rem;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  font-weight:400;
}
::selection{background:var(--accent);color:#fff}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
.wrap{max-width:72rem;margin:0 auto;padding:0 clamp(1.5rem,6vw,4.5rem)}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* --------------------------------------------------------------------------
   Aparición al hacer scroll (fade + elevación sutil)
   -------------------------------------------------------------------------- */
.rv{opacity:0;transform:translateY(14px);transition:opacity .8s ease,transform .8s ease}
.rv.on{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
  .hero-geo .g{animation:none !important}
}

/* --------------------------------------------------------------------------
   Navegación
   -------------------------------------------------------------------------- */
nav{position:absolute;top:0;left:0;right:0;z-index:10}
.nav-in{display:flex;align-items:center;justify-content:space-between;padding-top:2.2rem}
.logo{font-size:.8125rem;letter-spacing:.22em;color:var(--night-text);font-weight:500}
.nav-links{display:flex;align-items:center;gap:2.4rem;font-size:.8125rem;color:var(--night-mute)}
.nav-links a{transition:color .25s}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--night-text)}
.nav-cta{color:var(--night-text) !important;border-bottom:1px solid var(--accent);padding-bottom:2px}
.lang{font-size:.75rem;letter-spacing:.08em;color:var(--night-mute)}
.lang span{opacity:.45}
@media (max-width:900px){.nav-links a:not(.nav-cta){display:none}}

/* --------------------------------------------------------------------------
   Hero — sin fotografía. Geometría arquitectónica abstracta.
   Trama fina de plano técnico + volúmenes a línea. Todo a muy baja opacidad.
   -------------------------------------------------------------------------- */
.hero{
  position:relative;
  background:var(--night);
  background-image:
    linear-gradient(rgba(244,242,237,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244,242,237,.028) 1px, transparent 1px);
  background-size:104px 104px;
  color:var(--night-text);
  min-height:100vh;
  display:flex;
  align-items:center;
  overflow:hidden;
}
.hero-geo{position:absolute;top:0;right:0;bottom:0;width:46%;pointer-events:none}
.hero-geo .g{
  position:absolute;
  border:1px solid rgba(244,242,237,.10);
  animation:drift 16s ease-in-out infinite;
}
.hero-geo .g1{width:52%;height:46%;top:20%;right:22%}
.hero-geo .g2{width:34%;height:30%;top:32%;right:12%;border-color:rgba(244,242,237,.06);animation-delay:-5s;animation-duration:20s}
.hero-geo .g3{width:20%;height:64%;top:26%;right:40%;border-color:rgba(244,242,237,.045);animation-delay:-9s;animation-duration:24s}
.hero-geo .g-line{position:absolute;top:52%;right:0;width:58%;height:1px;background:rgba(244,242,237,.10)}
.hero-geo .g-mark{position:absolute;top:calc(52% - 20px);right:34%;width:1px;height:41px;background:var(--accent)}
@keyframes drift{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-9px)}
}
.hero-in{position:relative;z-index:2;padding:9rem 0 7rem;max-width:46rem}
@media (max-width:900px){
  .hero{min-height:92vh}
  .hero-geo{width:100%;opacity:.6}
  .hero-in{padding:8rem 0 5rem}
}

.kicker{font-size:.75rem;letter-spacing:.26em;color:var(--night-mute);text-transform:uppercase;margin-bottom:3rem}
.kicker.k-light{color:var(--ink-mute)}
.kicker b{color:var(--accent);font-weight:500;margin-right:.9rem}

.hero h1{
  font-family:var(--serif);
  font-weight:500;
  font-size:clamp(3rem,7.6vw,6.9rem);
  line-height:1.04;
  letter-spacing:-.01em;
  margin-bottom:2.8rem;
}
.hero h1 em{font-style:normal;box-shadow:inset 0 -2px 0 var(--accent)}
.hero p.sub{font-size:1rem;line-height:2;color:var(--night-soft);max-width:29rem;margin-bottom:3.2rem}
.hero p.sub strong{color:var(--night-text);font-weight:400}

/* --------------------------------------------------------------------------
   Botones
   -------------------------------------------------------------------------- */
.btn{
  display:inline-block;
  background:var(--accent);
  color:#fff;
  font-size:.875rem;font-weight:500;letter-spacing:.02em;
  padding:1.05rem 2.2rem;
  border:1px solid var(--accent);
  border-radius:2px;
  cursor:pointer;
  transition:background .25s,color .25s;
  font-family:var(--sans);
}
.btn:hover,.btn:focus-visible{background:transparent;color:var(--accent)}
.btn-note{font-size:.78rem;color:var(--night-mute);margin-top:1.1rem}
.btn-ghost{
  display:inline-block;background:transparent;color:var(--ink);
  font-size:.875rem;font-weight:500;padding:1.05rem 2.2rem;
  border:1px solid var(--ink);border-radius:2px;cursor:pointer;
  transition:border-color .25s,color .25s;font-family:var(--sans);
}
.btn-ghost:hover,.btn-ghost:focus-visible{border-color:var(--accent);color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

/* --------------------------------------------------------------------------
   Secciones claras
   -------------------------------------------------------------------------- */
section.light{background:var(--paper);padding:clamp(7rem,16vh,12rem) 0}
section.light + section.light{border-top:1px solid var(--paper-line)}
h2{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(2.1rem,4.2vw,3.4rem);
  line-height:1.15;letter-spacing:-.005em;
  margin-bottom:2.4rem;max-width:36rem;
}
.prose{max-width:var(--measure);color:var(--ink-soft)}
.prose p{margin-bottom:1.7rem}
/* Justificado global de párrafos de lectura, con partición de palabras (es) */
.prose p,.manifesto p,.faq .ans,.hero p.sub,.chapter .body{
  text-align:justify;
  hyphens:auto;
  -webkit-hyphens:auto;
}
.prose p:last-child{margin-bottom:0}
.prose strong{color:var(--ink);font-weight:400}
.aside-close{font-family:var(--serif);font-style:italic;font-size:clamp(1.5rem,2.6vw,2rem);color:var(--ink);margin-top:5rem;line-height:1.4}

/* Secciones 01 y 02 centradas: eje central, párrafos justificados dentro */
#problema .wrap,#pensamos .wrap{text-align:center}
#problema h2,#pensamos h2{max-width:36rem;margin-left:auto;margin-right:auto}
#problema .prose,#pensamos .manifesto{margin-left:auto;margin-right:auto;text-align:left}
#problema .aside-close{text-align:center}

/* --------------------------------------------------------------------------
   Manifiesto
   -------------------------------------------------------------------------- */
.manifesto{max-width:40rem}
.manifesto p{font-family:var(--serif);font-size:clamp(1.35rem,2.3vw,1.8rem);line-height:1.6;color:var(--ink);margin-bottom:2.6rem;font-weight:400}
.manifesto p.mute{color:var(--ink-mute);font-size:clamp(1.15rem,1.9vw,1.45rem)}
.manifesto p:last-child{margin-bottom:0}

/* --------------------------------------------------------------------------
   Respiraciones editoriales
   -------------------------------------------------------------------------- */
.breath{padding:clamp(8rem,20vh,15rem) 0;text-align:center;background:var(--paper);border-top:1px solid var(--paper-line)}
.breath .rule{width:2.4rem;height:1px;background:var(--accent);margin:0 auto 2.6rem}
.breath p{font-family:var(--serif);font-style:italic;font-size:clamp(1.7rem,3.4vw,2.7rem);line-height:1.35;color:var(--ink)}
.breath-dark{background:var(--night);border:none;padding:clamp(10rem,26vh,18rem) 0}
.breath-dark p{font-style:normal;font-size:clamp(2.4rem,5.6vw,4.6rem);color:var(--night-text);line-height:1.2;letter-spacing:-.005em}
.breath-dark .rule{margin-bottom:3.4rem}

/* --------------------------------------------------------------------------
   Método — capítulos editoriales
   -------------------------------------------------------------------------- */
.chapters{margin-top:5.5rem}
.chapter{
  display:grid;grid-template-columns:minmax(6rem,12rem) 1fr;
  gap:2rem 4rem;padding:4.5rem 0;
  border-top:1px solid var(--paper-line);align-items:start;
}
.chapter .num{
  font-family:var(--serif);font-size:clamp(3.2rem,6vw,5rem);
  line-height:.9;color:var(--paper-line);font-weight:400;position:relative;
}
.chapter .num i{font-style:normal;position:absolute;left:0;top:0;color:var(--accent);opacity:0;transition:opacity .5s}
.chapter:hover .num i{opacity:1}
.chapter h3{font-family:var(--serif);font-weight:500;font-size:1.9rem;margin-bottom:1rem;color:var(--ink)}
.chapter .body{max-width:30rem;color:var(--ink-soft);font-size:1rem}
@media (max-width:700px){.chapter{grid-template-columns:1fr;gap:1rem}}

/* --------------------------------------------------------------------------
   Resultados
   -------------------------------------------------------------------------- */
.results-list{margin-top:5rem;max-width:44rem}
.results-list p{
  font-family:var(--serif);font-size:clamp(1.45rem,2.7vw,2.1rem);
  line-height:1.45;color:var(--ink);padding:2.2rem 0;
  border-top:1px solid var(--paper-line);font-weight:400;
}
.results-list p:last-of-type{border-bottom:1px solid var(--paper-line)}
.results-close{margin-top:4rem;font-family:var(--serif);font-style:italic;font-size:clamp(1.4rem,2.4vw,1.9rem);color:var(--ink-mute)}
.mid-cta{margin-top:5rem}

/* --------------------------------------------------------------------------
   Sobre Emy — única aparición de la fotografía, gran formato editorial
   -------------------------------------------------------------------------- */
.emy{display:grid;grid-template-columns:minmax(18rem,28rem) 1fr;gap:clamp(3rem,8vw,7rem);align-items:start}
.emy-photo img{width:100%;filter:grayscale(1)}
.emy-photo figcaption{font-size:.75rem;letter-spacing:.14em;color:var(--ink-mute);margin-top:1.2rem;text-transform:uppercase}
.emy-idea{font-family:var(--serif);font-size:clamp(1.5rem,2.6vw,2.1rem);line-height:1.45;color:var(--ink);margin-bottom:2.6rem;font-weight:500;max-width:32rem}
.pull{
  font-family:var(--serif);font-style:italic;font-size:1.5rem;line-height:1.5;
  color:var(--ink);border-left:1px solid var(--accent);
  padding-left:1.8rem;margin:3rem 0;max-width:30rem;
}
.sign{font-size:.8125rem;letter-spacing:.16em;color:var(--ink-mute);text-transform:uppercase;margin-top:3rem}
@media (max-width:820px){.emy{grid-template-columns:1fr}.emy-photo{max-width:24rem}}

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */
.faq{max-width:46rem;margin-top:4.5rem}
.faq details{border-top:1px solid var(--paper-line)}
.faq details:last-child{border-bottom:1px solid var(--paper-line)}
.faq summary{
  list-style:none;cursor:pointer;padding:2rem 3rem 2rem 0;
  font-weight:500;font-size:1.05rem;color:var(--ink);
  position:relative;transition:color .25s;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:'+';position:absolute;right:.2rem;top:50%;
  transform:translateY(-50%);
  font-family:var(--serif);font-size:1.6rem;color:var(--ink-mute);
  font-weight:400;transition:transform .3s,color .3s;
}
.faq details[open] summary::after{transform:translateY(-50%) rotate(45deg);color:var(--accent)}
.faq summary:hover,.faq summary:focus-visible{color:var(--accent)}
.faq .ans{padding:0 3rem 2.4rem 0;color:var(--ink-soft);max-width:40rem;font-size:1rem}

/* --------------------------------------------------------------------------
   Cierre — portada de libro
   -------------------------------------------------------------------------- */
.cover{background:var(--night);color:var(--night-text);padding:clamp(9rem,24vh,16rem) 0;text-align:center}
.cover h2{margin:0 auto 1.6rem;color:var(--night-text);font-size:clamp(2.6rem,6vw,5rem);max-width:none}
.cover p.lead{color:var(--night-mute);font-size:.95rem;margin-bottom:3.6rem}
.form-shell{max-height:0;overflow:hidden;transition:max-height .7s ease;margin:0 auto;max-width:26rem;text-align:left}
.form-shell.open{max-height:46rem}
.form-shell form{padding-top:3.5rem}
.f-field{margin-bottom:2rem}
.f-field label{display:block;font-size:.75rem;letter-spacing:.16em;text-transform:uppercase;color:var(--night-mute);margin-bottom:.6rem}
.f-field input{
  width:100%;background:transparent;border:none;
  border-bottom:1px solid var(--night-line);
  color:var(--night-text);font-family:var(--sans);font-size:1rem;
  padding:.6rem 0;outline:none;transition:border-color .25s;
}
.f-field input:focus{border-color:var(--accent)}
.form-note{font-size:.78rem;color:var(--night-mute);margin-top:1.6rem;line-height:1.7}
.form-ok{display:none;padding-top:3.5rem;text-align:center;font-family:var(--serif);font-size:1.5rem;font-style:italic;color:var(--night-text)}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
footer{background:var(--night);border-top:1px solid var(--night-line);padding:2.6rem 0}
.foot{display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;align-items:center;font-size:.78rem;color:var(--night-mute)}
.foot a:hover,.foot a:focus-visible{color:var(--night-text)}
.foot .fl{display:flex;gap:1.8rem;align-items:center}