/* ---------------------------------------------------------
   Vito Martínez — Sistema de Crecimiento Compuesto de Clientes
   v3 — Sistema visual estilo danmall.com:
   fondo negro puro, cero border-radius, display sans ultra-pesado
   en mayúsculas con interlineado negativo, cursiva serif como
   contrapunto editorial, numerales gigantes, bloques de color
   a sangre. Mobile-first, sin dependencias externas.

   >>> COLOR DE ACENTO: cambiar --accent (línea de abajo) cambia
   toda la página. #c7ff1f = lima eléctrico. Para el rosa de
   danmall.com, usar #f779d0.
--------------------------------------------------------- */

:root{
  --black:#000000;
  --white:#ffffff;

  --accent:#c7ff1f;        /* acento primario */
  --accent-ink:#000000;    /* texto sobre el acento */

  --brown:#26211d;
  --forest:#10170d;
  --slate:#2f444d;
  --sand:#a69181;

  --muted:rgba(255,255,255,0.52);
  --faint:rgba(255,255,255,0.28);
  --hair:rgba(255,255,255,0.16);

  --maxw:1180px;

  /* Display: peso 900 + mayúsculas + interlineado negativo
     imita las condensadas pesadas (United Sans / Bueno) sin CDN. */
  --font-display:"Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body:-apple-system, BlinkMacSystemFont, "SF Pro Text",
              "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif:"Iowan Old Style", "Palatino Linotype", Palatino,
              Georgia, "Times New Roman", serif;

  --ease:cubic-bezier(0.22, 0.61, 0.36, 1);
}

*{ box-sizing:border-box; }

html{ scroll-behavior:smooth; background:var(--black); }

body{
  margin:0;
  font-family:var(--font-body);
  color:var(--white);
  background:var(--black);
  -webkit-font-smoothing:antialiased;
  line-height:1.45;
  overflow-x:hidden;
}

a{ color:inherit; text-decoration:none; }
img{ max-width:100%; }

.accent{ color:var(--accent); }
.serif{ font-family:var(--font-serif); font-style:italic; }
.br-desk{ display:none; }

.wrap{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 22px;
}

section{ position:relative; }

/* ---------- Tipografía display ---------- */

/* Escala calibrada para que los saltos manuales (.br-desk) no
   se vuelvan a partir: la línea más larga de cada titular entra
   completa dentro de --maxw. */
.display{
  font-family:var(--font-display);
  font-weight:900;
  text-transform:uppercase;
  font-size:clamp(30px, 6.4vw, 72px);
  line-height:0.90;
  letter-spacing:-0.025em;
  margin:0 0 56px;
}

.stacked{
  font-family:var(--font-display);
  font-weight:900;
  text-transform:uppercase;
  font-size:clamp(52px, 15vw, 130px);
  line-height:0.80;
  letter-spacing:-0.035em;
  margin:0;
  display:flex;
  flex-direction:column;
}

.stacked-sm{ font-size:clamp(40px, 10vw, 78px); }

/* ---------- Kicker ---------- */

.kicker{
  font-family:var(--font-display);
  font-size:12px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.22em;
  color:var(--accent);
  margin:0 0 26px;
}

.kicker-ink{ color:rgba(0,0,0,0.55); }

/* ---------- Header ---------- */

.site-header{
  position:fixed;
  top:0; left:0; right:0;
  display:flex;
  align-items:center;
  gap:28px;
  padding:0 0 0 22px;
  height:60px;
  background:rgba(0,0,0,0.70);
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid transparent;
  z-index:100;
  transition:border-color .3s var(--ease), background .3s var(--ease);
}

.site-header.scrolled{ border-bottom-color:var(--hair); }

.wordmark{
  font-family:var(--font-display);
  font-size:15px;
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:-0.01em;
  margin-right:auto;
}

.site-nav{ display:none; gap:26px; }

.site-nav a{
  font-size:12px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.14em;
  color:var(--muted);
  transition:color .2s var(--ease);
}
.site-nav a:hover{ color:var(--accent); }

.header-cta{
  align-self:stretch;
  display:flex;
  align-items:center;
  padding:0 22px;
  background:var(--accent);
  color:var(--accent-ink);
  font-family:var(--font-display);
  font-size:12px;
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.06em;
  transition:background .2s var(--ease);
}
.header-cta:hover{ background:var(--white); }

/* ---------- Botones ---------- */

.btn{
  display:inline-block;
  font-family:var(--font-display);
  font-size:15px;
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.04em;
  padding:20px 30px;
  border:none;
  cursor:pointer;
  transition:background .2s var(--ease), color .2s var(--ease), transform .12s var(--ease);
}

.btn:active{ transform:translateY(1px); }

.btn-accent{
  background:var(--accent);
  color:var(--accent-ink);
}
.btn-accent:hover{ background:var(--white); }

.btn-ink{
  background:var(--black);
  color:var(--white);
}
.btn-ink:hover{ background:var(--white); color:var(--black); }

.btn-ghost{
  font-size:14px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.12em;
  color:var(--white);
  padding:20px 0;
  border-bottom:2px solid var(--faint);
  transition:border-color .2s var(--ease), color .2s var(--ease);
}
.btn-ghost:hover{ color:var(--accent); border-bottom-color:var(--accent); }

.chev{ display:inline-block; transition:transform .25s var(--ease); }
.btn-ghost:hover .chev,
.row:hover .chev{ transform:translateX(5px); }

/* ---------- Hero ---------- */

.hero{
  min-height:100svh;
  display:flex;
  align-items:center;
  overflow:hidden;
  border-bottom:1px solid var(--hair);
}

#netCanvas{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  display:block;
  opacity:.9;
}

.hero-inner{
  position:relative;
  z-index:2;
  width:100%;
  max-width:var(--maxw);
  margin:0 auto;
  padding:130px 22px 150px;
}

/* Retrato del hero: la foto ya viene sobre negro, así que sólo
   hace falta disolver el borde izquierdo para que no choque con
   el titular. Sin recorte, sin fondo que quitar.
   En móvil baja a capa ambiental para no pelearse con los CTAs;
   gana presencia conforme hay ancho (ver breakpoints). */
.hero-portrait{
  position:absolute;
  right:0;
  bottom:0;
  height:34%;
  width:auto;
  z-index:1;
  opacity:.42;
  filter:grayscale(1) contrast(1.12);
  -webkit-mask-image:linear-gradient(to right, transparent 0, #000 38%);
          mask-image:linear-gradient(to right, transparent 0, #000 38%);
  pointer-events:none;
  user-select:none;
}

.hero-lede{
  font-family:var(--font-serif);
  font-style:italic;
  font-size:clamp(17px, 2.4vw, 23px);
  line-height:1.35;
  color:var(--muted);
  max-width:520px;
  margin:0 0 34px;
}

h1{
  font-family:var(--font-display);
  font-weight:900;
  text-transform:uppercase;
  /* 4 líneas: la escala se calibra para que la más larga
     ("Necesita un sistema.") entre en una sola línea. */
  font-size:clamp(26px, 6.1vw, 76px);
  line-height:0.86;
  letter-spacing:-0.035em;
  margin:0 0 44px;
  display:flex;
  flex-direction:column;
}

h1 .line{ display:block; }

.hero-actions{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:8px;
}

.scroll-hint{
  position:absolute;
  bottom:26px;
  left:50%;
  transform:translateX(-50%);
  width:1px;
  height:52px;
  background:var(--hair);
  overflow:hidden;
  z-index:2;
}
.scroll-hint span{
  position:absolute;
  inset:0;
  background:var(--accent);
  animation:scrollDrop 2.4s var(--ease) infinite;
}

@keyframes scrollDrop{
  0%   { transform:translateY(-100%); }
  60%  { transform:translateY(100%); }
  100% { transform:translateY(100%); }
}

/* ---------- Marquee ---------- */

.marquee{
  background:var(--accent);
  color:var(--accent-ink);
  overflow:hidden;
  padding:14px 0;
  white-space:nowrap;
}

.marquee-track{
  display:inline-flex;
  animation:slide 26s linear infinite;
}

.marquee-track span{
  font-family:var(--font-display);
  font-size:clamp(16px, 2.4vw, 24px);
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:-0.01em;
  padding-right:24px;
}

.marquee-track i{ font-style:normal; opacity:.45; padding:0 10px; }

@keyframes slide{
  from{ transform:translateX(0); }
  to  { transform:translateX(-50%); }
}

/* ---------- Síntoma ---------- */

.symptom{ padding:110px 0 120px; }

.numbered{
  list-style:none;
  margin:0;
  padding:0;
  border-top:1px solid var(--hair);
}

.numbered li{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
  padding:36px 0;
  border-bottom:1px solid var(--hair);
}

.num{
  font-family:var(--font-serif);
  font-size:clamp(48px, 9vw, 76px);
  font-weight:300;
  line-height:0.8;
  letter-spacing:-0.05em;
  color:var(--faint);
  display:block;
}

.num-body h3{
  font-family:var(--font-display);
  font-size:clamp(20px, 3.2vw, 30px);
  font-weight:900;
  text-transform:uppercase;
  line-height:1.02;
  letter-spacing:-0.02em;
  margin:0 0 12px;
}

.num-body p{
  margin:0;
  font-size:16px;
  line-height:1.6;
  color:var(--muted);
  max-width:56ch;
}

/* ---------- Principio (bloque de color a sangre) ---------- */

.principle{
  background:var(--accent);
  color:var(--accent-ink);
  padding:120px 0;
}

.principle-text{
  font-family:var(--font-display);
  font-size:clamp(28px, 6.4vw, 72px);
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:-0.035em;
  line-height:0.86;
  margin:0;
}

.principle-text em{
  font-family:var(--font-serif);
  font-style:italic;
  font-weight:400;
  text-transform:none;
  letter-spacing:-0.01em;
}

.principle-answer{ margin-top:26px; }

/* ---------- El Sistema ---------- */

.system{ padding:120px 0; }

.node-flow{
  display:flex;
  flex-direction:column;
  align-items:stretch;
  margin:0 auto 90px;
  max-width:820px;
}

.node{
  position:relative;
  padding:18px 26px;
  border:1px solid var(--hair);
  font-family:var(--font-display);
  font-size:clamp(15px, 2.2vw, 19px);
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.02em;
  color:var(--muted);
  text-align:center;
  background:var(--black);
  transition:color .45s var(--ease), border-color .45s var(--ease),
             background .45s var(--ease);
  z-index:2;
}

.node.active{
  color:var(--accent-ink);
  background:var(--accent);
  border-color:var(--accent);
}

.node.done{
  color:var(--white);
  border-color:var(--accent);
}

.link{
  width:1px;
  height:38px;
  margin:0 auto;
  background:var(--hair);
  position:relative;
  overflow:hidden;
  z-index:1;
}

.link i{
  position:absolute;
  inset:0;
  background:var(--accent);
  transform:scaleY(0);
  transform-origin:top;
  transition:transform .5s var(--ease);
}

.link.filled i{ transform:scaleY(1); }

/* Bloques de color */

.blocks{
  display:grid;
  grid-template-columns:1fr;
  gap:2px;
}

.block{
  padding:42px 32px 46px;
  min-height:300px;
  display:flex;
  flex-direction:column;
}

.block-brown{ background:var(--brown); }
.block-forest{ background:var(--forest); }
.block-slate{ background:var(--slate); }

.block-num{
  font-family:var(--font-serif);
  font-size:56px;
  font-weight:300;
  line-height:1;
  letter-spacing:-0.05em;
  color:var(--accent);
  margin-bottom:26px;
}

.block h3{
  font-family:var(--font-display);
  font-size:clamp(24px, 4vw, 34px);
  font-weight:900;
  text-transform:uppercase;
  line-height:0.94;
  letter-spacing:-0.025em;
  margin:0 0 16px;
}

.block p{
  margin:0;
  font-size:15.5px;
  line-height:1.6;
  color:rgba(255,255,255,0.66);
}

/* ---------- Biblioteca ---------- */

.library{
  padding:120px 0;
  border-top:1px solid var(--hair);
}

.library-head{ margin-bottom:64px; }

.library-lede{
  font-size:clamp(17px, 2.4vw, 22px);
  line-height:1.4;
  color:var(--muted);
  margin:28px 0 0;
  max-width:420px;
}

.library-lede .serif{ color:var(--white); }

.rows{ border-top:1px solid var(--hair); }

.row{
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:start;
  column-gap:22px;
  row-gap:12px;
  padding:30px 0;
  border-bottom:1px solid var(--hair);
  transition:background .25s var(--ease), padding-left .25s var(--ease);
}

.row:hover{
  background:rgba(255,255,255,0.04);
  padding-left:16px;
}

.row-num{
  font-family:var(--font-serif);
  font-size:34px;
  font-weight:300;
  line-height:1;
  letter-spacing:-0.05em;
  color:var(--faint);
  transition:color .25s var(--ease);
}
.row:hover .row-num{ color:var(--accent); }

.row-main{ display:flex; flex-direction:column; gap:8px; }

.row-kicker{
  font-family:var(--font-display);
  font-size:11px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.2em;
  color:var(--accent);
}

.row-title{
  font-family:var(--font-display);
  font-size:clamp(21px, 3.4vw, 32px);
  font-weight:900;
  text-transform:uppercase;
  line-height:1.02;
  letter-spacing:-0.025em;
}

.row-go{
  grid-column:2;
  font-size:12px;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.16em;
  color:var(--muted);
}

/* ---------- Quién soy ---------- */

.about{
  padding:120px 0;
  border-top:1px solid var(--hair);
}

.about-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:44px;
}

.about-body p{
  font-size:clamp(20px, 2.9vw, 30px);
  font-weight:400;
  line-height:1.35;
  letter-spacing:-0.015em;
  margin:0 0 28px;
  color:var(--white);
}

.about-body p:last-child{ margin-bottom:0; color:var(--muted); }

/* Retrato de "Quién soy": se disuelve hacia abajo dentro del negro
   de la sección, igual que el tratamiento del hero. */
.about-portrait{
  display:block;
  width:100%;
  max-width:270px;
  height:auto;
  margin-top:34px;
  filter:grayscale(1) contrast(1.1);
  -webkit-mask-image:linear-gradient(to top, transparent 0, #000 34%);
          mask-image:linear-gradient(to top, transparent 0, #000 34%);
}

.about-body em{
  font-family:var(--font-serif);
  font-style:italic;
  color:var(--accent);
}

/* ---------- CTA final (bloque de color a sangre) ---------- */

.cta-final{
  background:var(--accent);
  color:var(--accent-ink);
  padding:120px 0;
}

.display-ink{ color:var(--accent-ink); margin-bottom:26px; }

.cta-sub{
  font-family:var(--font-serif);
  font-style:italic;
  font-size:clamp(18px, 2.6vw, 24px);
  line-height:1.35;
  color:rgba(0,0,0,0.62);
  margin:0 0 48px;
  max-width:520px;
}

.lead-form{
  display:grid;
  grid-template-columns:1fr;
  gap:2px;
  max-width:720px;
}

.field{
  background:var(--white);
  padding:14px 18px 12px;
  display:flex;
  flex-direction:column;
  gap:2px;
}

.field label{
  font-family:var(--font-display);
  font-size:10px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.2em;
  color:rgba(0,0,0,0.42);
}

.lead-form input{
  font-family:var(--font-body);
  font-size:17px;
  color:var(--black);
  background:transparent;
  border:none;
  outline:none;
  padding:4px 0;
  width:100%;
}

.lead-form input::placeholder{ color:rgba(0,0,0,0.30); }

.form-message{
  min-height:22px;
  font-size:14.5px;
  font-weight:600;
  margin-top:22px;
  color:var(--accent-ink);
}

.form-message.error{ color:#7a0b0b; }

.privacy-note{
  font-size:13px;
  color:rgba(0,0,0,0.55);
  margin-top:12px;
}

/* ---------- Footer ---------- */

.site-footer{
  background:var(--black);
  padding:70px 0 60px;
}

.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:22px;
}

.footer-brand{
  font-family:var(--font-display);
  font-size:clamp(30px, 7vw, 52px);
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:-0.03em;
  line-height:1;
  margin:0;
  color:var(--accent);
}

.footer-note{
  margin:0;
  font-size:14px;
  line-height:1.55;
  color:var(--muted);
  max-width:44ch;
}

.footer-legal{
  margin:0;
  font-size:12px;
  letter-spacing:.04em;
  color:var(--faint);
}

/* ---------- Popup flotante ---------- */

.visually-hidden{
  position:absolute;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden;
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

.promo{
  position:fixed;
  right:0; bottom:0; left:0;
  z-index:200;
  background:var(--accent);
  color:var(--accent-ink);
  padding:26px 22px 24px;
  transform:translateY(105%);
  transition:transform .45s var(--ease);
  box-shadow:0 -10px 40px rgba(0,0,0,0.5);
}

.promo.show{ transform:translateY(0); }

.promo-close{
  position:absolute;
  top:6px; right:10px;
  width:34px; height:34px;
  background:none;
  border:none;
  cursor:pointer;
  font-size:28px;
  line-height:1;
  color:var(--accent-ink);
  opacity:.5;
  transition:opacity .2s var(--ease);
}
.promo-close:hover{ opacity:1; }

.promo-kicker{
  font-family:var(--font-display);
  font-size:11px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.2em;
  color:rgba(0,0,0,0.5);
  margin:0 0 8px;
}

.promo-title{
  font-family:var(--font-display);
  font-size:28px;
  font-weight:900;
  text-transform:uppercase;
  line-height:0.92;
  letter-spacing:-0.025em;
  margin:0 0 12px;
}

.promo-title br{ display:none; }

.promo-text{
  font-family:var(--font-serif);
  font-style:italic;
  font-size:15.5px;
  line-height:1.35;
  color:rgba(0,0,0,0.66);
  margin:0 0 18px;
}

.promo-form{ display:grid; gap:2px; }

.promo-form input{
  font-family:var(--font-body);
  font-size:16px;
  padding:15px 16px;
  border:none;
  outline:none;
  background:var(--white);
  color:var(--black);
  width:100%;
}
.promo-form input::placeholder{ color:rgba(0,0,0,0.32); }

.promo-form .btn{ font-size:14px; padding:16px 20px; }

.promo-msg{
  min-height:18px;
  font-size:13.5px;
  font-weight:600;
  margin:12px 0 0;
  color:var(--accent-ink);
}
.promo-msg.error{ color:#7a0b0b; }

/* ---------- Reveal on scroll ---------- */

.reveal{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .7s var(--ease), transform .7s var(--ease);
}

.reveal.d1{ transition-delay:.08s; }
.reveal.d2{ transition-delay:.16s; }
.reveal.d3{ transition-delay:.24s; }
.reveal.d4{ transition-delay:.32s; }

.reveal.in-view{
  opacity:1;
  transform:translateY(0);
}

/* ---------- Pantallas muy estrechas (iPhone SE) ---------- */

@media (max-width:359px){
  /* Con tan poca altura útil el CTA llegaba a pisar la cara. */
  .hero-portrait{ height:24%; opacity:.32; }
  .hero-inner{ padding-bottom:120px; }
}

/* ---------- Tablet ---------- */

@media (min-width:700px){
  .br-desk{ display:inline; }

  .numbered li{
    grid-template-columns:120px 1fr;
    gap:28px;
    align-items:start;
    padding:44px 0;
  }

  .blocks{ grid-template-columns:repeat(3, 1fr); }

  .row{
    grid-template-columns:auto 1fr auto;
    align-items:center;
    padding:34px 0;
  }
  .row-go{ grid-column:auto; text-align:right; }

  .hero-actions{
    flex-direction:row;
    align-items:center;
    gap:34px;
  }

  .hero-portrait{ height:46%; opacity:.55; }

  .lead-form{ grid-template-columns:1fr 1fr; }
  .lead-form button{ grid-column:1 / -1; }

  .footer-grid{ grid-template-columns:1fr 1fr; align-items:end; }
  .footer-legal{ grid-column:1 / -1; padding-top:26px; border-top:1px solid var(--hair); }

  /* El popup deja de ser barra inferior y pasa a tarjeta de esquina. */
  .promo{
    left:auto;
    right:40px;
    width:350px;
    padding:32px 28px 28px;
  }
  .promo-title{ font-size:34px; }
  .promo-title br{ display:inline; }
}

/* ---------- Desktop ---------- */

@media (min-width:1000px){
  .site-nav{ display:flex; }
  .wrap{ padding:0 40px; }
  .hero-inner{ padding:150px 40px 110px; }

  .symptom, .system, .library, .about{ padding:150px 0; }
  .principle, .cta-final{ padding:160px 0; }

  .numbered li{ grid-template-columns:180px 1fr; gap:40px; }

  .library-head{
    display:grid;
    grid-template-columns:1fr 1fr;
    align-items:end;
    gap:40px;
  }
  .library-lede{ margin:0 0 10px; }

  .about-grid{ grid-template-columns:1fr 1.4fr; gap:70px; }

  .block{ padding:52px 40px 56px; min-height:400px; }

  /* Con ancho real, el retrato del hero ocupa la columna derecha
     completa y sube su presencia. */
  .hero-portrait{
    height:92%;
    opacity:.85;
    -webkit-mask-image:linear-gradient(to right, transparent 0, #000 45%);
            mask-image:linear-gradient(to right, transparent 0, #000 45%);
  }

  .about-portrait{ max-width:340px; margin-top:44px; }

  .promo{ right:60px; }

  /* La cadena de nodos pasa a horizontal sólo cuando hay ancho
     real para los 4 nodos + 3 conectores sin desbordar. */
  .node-flow{ flex-direction:row; align-items:center; }
  .node{ flex:1 1 0; min-width:0; }
  .link{
    width:auto;
    flex:0 0 46px;
    height:1px;
    margin:0;
  }
  .link i{
    transform:scaleX(0);
    transform-origin:left;
  }
  .link.filled i{ transform:scaleX(1); }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .reveal{ opacity:1; transform:none; transition:none; }
  #netCanvas{ display:none; }
  .node, .link i{ transition:none; }
  .marquee-track{ animation:none; }
  .scroll-hint{ display:none; }
  .promo{ transition:none; }
}