/* =========================================================
   Estudios Integrados — hoja de estilos única
   Sistema visual: "el estado de resultados"
   Grilla tipo ledger, reglas hairline, bordes rectos.
   ========================================================= */

:root{
  --navy:#0F172A;
  --navy-2:#16233B;
  --navy-deep:#0A1222;
  --ink:#0F172A;
  --ink-2:#4C5B6E;
  --paper:#F4F7F9;
  --line:#DCE3E9;
  --line-dark:rgba(255,255,255,.14);
  --cian:#00B4D8;
  --azul:#0077B6;
  --wa:#25D366;
  --wa-dark:#1EB357;

  --shell:1200px;
  --gut:24px;
  --pad:clamp(72px,8vw,124px);
  --head-h:84px;

  --sans:"Archivo","Helvetica Neue",Arial,sans-serif;
  --text:Arial,"Helvetica Neue",Helvetica,sans-serif;

  --ease:cubic-bezier(.22,.7,.25,1);
}

*,*::before,*::after{box-sizing:border-box}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}

body{
  margin:0;
  background:#fff;
  color:var(--ink);
  font-family:var(--text);
  font-size:17px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img,svg{max-width:100%;display:block}

a{color:inherit}

h1,h2,h3,.eyebrow,.btn,.nav,.step__n,.foot__data dt,.cascade__lbl,.pillars strong{
  font-family:var(--sans);
}

h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.02em;line-height:1.1}
p{margin:0}

:focus-visible{
  outline:2px solid var(--cian);
  outline-offset:3px;
}

.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gut);
}

.skip{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:#fff;color:var(--navy);padding:12px 18px;font-family:var(--sans);
}
.skip:focus{left:8px;top:8px}

/* ---------- eyebrow: marcador de sección ---------- */
.eyebrow{
  display:flex;align-items:center;gap:12px;
  margin:0 0 20px;
  font-size:.75rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:var(--azul);
}
.eyebrow::before{
  content:"";width:28px;height:2px;background:var(--cian);flex:none;
}
.eyebrow--light{color:var(--cian)}

/* ---------- botones ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:14px 26px;
  border:1px solid transparent;border-radius:2px;
  font-size:.95rem;font-weight:600;letter-spacing:.01em;
  text-decoration:none;cursor:pointer;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.btn--wa{background:var(--wa);color:#07301A}
.btn--wa:hover{background:var(--wa-dark)}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn--lg{padding:18px 34px;font-size:1rem}

/* =========================================================
   HEADER
   ========================================================= */
.head{
  position:fixed;inset:0 0 auto 0;z-index:100;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .3s var(--ease),border-color .3s var(--ease);
}
.head.is-stuck{
  background:rgba(15,23,42,.94);
  border-bottom-color:var(--line-dark);
  backdrop-filter:saturate(140%) blur(12px);
}
.head__in{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  min-height:var(--head-h);
  transition:min-height .3s var(--ease);
}
.head.is-stuck .head__in{min-height:68px}

/* barra de progreso de lectura */
.head::after{
  content:"";position:absolute;left:0;bottom:-1px;height:2px;
  width:var(--p,0%);background:var(--cian);
  opacity:0;transition:opacity .3s var(--ease);
}
.head.is-stuck::after{opacity:1}

.brand{display:block;line-height:0}
.brand img{height:60px;width:auto;transition:height .3s var(--ease)}
.head.is-stuck .brand img{height:46px}

.nav{display:flex;align-items:center;gap:30px}
.nav a{
  font-size:.9rem;font-weight:500;color:rgba(255,255,255,.82);text-decoration:none;
  transition:color .2s var(--ease);
}
.nav a:hover{color:#fff}
.nav a:not(.btn){position:relative;padding-block:4px}
.nav a:not(.btn)::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--cian);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav a:not(.btn):hover::after,
.nav a.is-active::after{transform:scaleX(1)}
.nav a.is-active{color:#fff}
.nav__cta{color:#07301A}
.nav__cta:hover{color:#07301A}

.burger{
  display:none;width:44px;height:44px;padding:11px;
  background:none;border:1px solid rgba(255,255,255,.3);border-radius:2px;cursor:pointer;
}
.burger span{display:block;height:2px;background:#fff;transition:transform .25s var(--ease),opacity .2s var(--ease)}
.burger span+span{margin-top:5px}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* =========================================================
   HERO
   ========================================================= */
.hero{
  position:relative;overflow:hidden;
  background:var(--navy);
  color:#fff;
  padding-top:calc(var(--head-h) + clamp(48px,5.5vw,76px));
  padding-bottom:0;
  scroll-margin-top:0;
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(120% 90% at 78% 32%,#000 10%,transparent 72%);
  mask-image:radial-gradient(120% 90% at 78% 32%,#000 10%,transparent 72%);
}
.hero::after{
  content:"";position:absolute;pointer-events:none;
  width:760px;height:760px;right:-180px;top:-220px;
  background:radial-gradient(circle,rgba(0,180,216,.16),transparent 62%);
}
.hero > *{position:relative;z-index:1}
.hero__in{
  display:grid;
  grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
  gap:clamp(40px,6vw,88px);
  align-items:center;
  padding-bottom:clamp(48px,5.5vw,78px);
}
.hero h1{
  font-size:clamp(2.1rem,3.9vw,3.3rem);
  line-height:1.08;
  letter-spacing:-.025em;
  font-weight:700;
  max-width:19ch;
}
.hero h1 em{
  display:block;
  font-style:normal;
  color:var(--cian);
  font-weight:600;
}
.lead{
  margin-top:26px;
  max-width:54ch;
  font-size:1.125rem;
  line-height:1.7;
  color:rgba(255,255,255,.76);
}
.hero__acts{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}

/* ---------- cascada (único momento de animación) ---------- */
.cascade{
  margin:0;
  border:1px solid var(--line-dark);
  background:linear-gradient(180deg,rgba(0,180,216,.05),transparent 60%);
  padding:28px 28px 24px;
}
.cascade__cap{
  font-family:var(--sans);
  font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;
  color:rgba(255,255,255,.5);
  padding-bottom:18px;border-bottom:1px solid var(--line-dark);
}
.cascade__chart{list-style:none;margin:0;padding:22px 0 0}
.cascade__row{display:grid;gap:7px}
.cascade__row+.cascade__row{margin-top:18px}
.cascade__lbl{
  grid-row:1;
  font-size:.75rem;letter-spacing:.02em;color:rgba(255,255,255,.62);
}
.cascade__track{
  grid-row:2;
  position:relative;display:block;height:18px;
  background:rgba(255,255,255,.05);
}
.cascade__bar{
  position:absolute;top:0;bottom:0;left:var(--off);
  width:0;
  transition:filter .25s var(--ease);
}
.cascade.is-in .cascade__bar{animation:grow .6s var(--ease) both}
.cascade__row{cursor:default}
.cascade__row:hover .cascade__lbl{color:#fff}
.cascade__row:hover .cascade__bar{filter:brightness(1.35)}
.cascade.is-in .cascade__row:nth-child(1) .cascade__bar{animation-delay:.25s}
.cascade.is-in .cascade__row:nth-child(2) .cascade__bar{animation-delay:.45s}
.cascade.is-in .cascade__row:nth-child(3) .cascade__bar{animation-delay:.65s}
.cascade.is-in .cascade__row:nth-child(4) .cascade__bar{animation-delay:.85s}
.cascade.is-in .cascade__row:nth-child(5) .cascade__bar{animation-delay:1.05s}

.is-pos{background:rgba(0,180,216,.22);box-shadow:inset 0 0 0 1px var(--cian)}
.is-mid{background:rgba(0,180,216,.5)}
.is-neg{
  background:repeating-linear-gradient(135deg,rgba(255,255,255,.3) 0 2px,transparent 2px 6px);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.22);
}
.is-res{background:var(--cian)}
.cascade__row:last-child .cascade__lbl{color:#fff;font-weight:600}

@keyframes grow{from{width:0}to{width:var(--h)}}

/* ---------- pilares al pie del hero ---------- */
.pillars{
  list-style:none;margin:0;padding:34px 0 40px;
  border-top:1px solid var(--line-dark);
  display:grid;grid-template-columns:repeat(3,1fr);gap:28px;
}
.pillars li{display:flex;flex-direction:column;gap:5px}
.pillars strong{font-size:.95rem;font-weight:600;color:#fff}
.pillars span{font-size:.9rem;color:rgba(255,255,255,.55)}

/* =========================================================
   BANDAS GENÉRICAS
   ========================================================= */
.band{padding:var(--pad) 0;background:#fff;scroll-margin-top:72px}
.band--paper{background:var(--paper)}
.band--dark{background:var(--navy);color:#fff}

.sec{margin-bottom:clamp(44px,5vw,68px)}
.sec h2{font-size:clamp(1.7rem,2.9vw,2.45rem);max-width:880px}
.band--dark .sec h2{color:#fff}

/* ---------- enfoque ---------- */
.situations{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:clamp(24px,3vw,44px);
}
.sit{position:relative;border-top:1px solid var(--line);padding-top:26px}
.sit::before{
  content:"";position:absolute;top:-1px;left:0;
  width:44px;height:2px;background:var(--cian);
  transform:scaleX(0);transform-origin:left;
  transition:width .35s var(--ease),transform .55s var(--ease);
}
.sit.is-in::before{transform:scaleX(1)}
.sit:hover::before{width:100%}
.sit h3{font-size:1.1rem;margin-bottom:12px}
.sit p{color:var(--ink-2);font-size:1rem}

.claim{
  margin-top:clamp(40px,5vw,64px);
  border-left:2px solid var(--cian);
  background:var(--paper);
  padding:28px 32px;
  font-size:1.15rem;
  line-height:1.6;
  max-width:70ch;
}

/* ---------- servicios: filas de libro mayor ---------- */
.ledger{border-bottom:1px solid var(--line)}
.ledger__row{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,.85fr) minmax(0,1.25fr);
  gap:clamp(24px,4vw,64px);
  align-items:start;
  padding:30px 0;
}
.ledger__row::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:var(--line);transform:scaleX(0);transform-origin:left;
  transition:transform .75s var(--ease),background-color .25s var(--ease);
}
.ledger__row.is-in::before{transform:scaleX(1)}
.ledger__row h3{
  font-size:1.2rem;
  transition:color .25s var(--ease);
}
.ledger__row p{color:var(--ink-2);font-size:1rem;max-width:68ch}
.ledger__row:hover::before{background:var(--cian)}
.ledger__row:hover h3{color:var(--azul)}

/* ---------- método: secuencia numerada ---------- */
.steps{list-style:none;margin:0;padding:0;border-bottom:1px solid var(--line)}
.step{
  position:relative;
  display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:clamp(24px,4vw,56px);
  padding:36px 0;
}
.step::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:var(--line);transform:scaleX(0);transform-origin:left;
  transition:transform .75s var(--ease);
}
.step.is-in::before{transform:scaleX(1)}
.step__n{transition:color .4s var(--ease),-webkit-text-stroke-color .4s var(--ease)}
.step.is-in .step__n{animation:tick .5s var(--ease) both;animation-delay:.25s}
@keyframes tick{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.step__n{
  font-size:clamp(2.2rem,4vw,3.2rem);
  font-weight:700;line-height:1;letter-spacing:-.04em;
  color:#C7D2DC;
}
@supports (-webkit-text-stroke:1px black){
  .step__n{-webkit-text-stroke:1.5px var(--azul);color:transparent}
}
.step__body h3{font-size:1.3rem;margin-bottom:10px}
.step__body p{color:var(--ink-2);max-width:72ch}

.trio{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:clamp(20px,2.5vw,36px);
  margin:24px 0 0;
}
.trio dt{
  font-family:var(--sans);font-size:.9rem;font-weight:600;
  padding-bottom:8px;margin-bottom:10px;
  border-bottom:1px solid var(--line);
}
.trio dd{margin:0;font-size:.95rem;color:var(--ink-2);line-height:1.55}

/* ---------- por qué ---------- */
.why{
  display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);
  gap:clamp(32px,5vw,72px);
  align-items:start;
}
.why h2{font-size:clamp(1.7rem,2.9vw,2.45rem);max-width:15ch}
.why__txt{display:grid;gap:20px}
.why__txt p{color:rgba(255,255,255,.76);font-size:1.075rem;max-width:62ch}

/* ---------- contacto ---------- */
.contact{border-top:1px solid var(--line-dark);padding-top:clamp(56px,6vw,88px)}
.contact__in{
  display:grid;grid-template-columns:minmax(0,1fr) auto;
  gap:clamp(28px,4vw,64px);
  align-items:center;
}
.contact h2{font-size:clamp(1.9rem,3.4vw,2.9rem)}
.contact .lead{margin-top:18px;max-width:52ch}

.lead,.sit p,.ledger__row p,.step__body p,.trio dd,.claim,.why__txt p{
  text-align:justify;
  hyphens:auto;-webkit-hyphens:auto;
}

/* =========================================================
   FOOTER
   ========================================================= */
.foot{background:var(--navy-deep);color:rgba(255,255,255,.72);padding:54px 0 40px}
.foot__in{display:grid;gap:34px}
.foot__logo{height:64px;width:auto}

.foot__data{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  margin:0;padding-top:28px;border-top:1px solid var(--line-dark);
}
.foot__data dt{
  font-size:.7rem;letter-spacing:.11em;text-transform:uppercase;
  color:rgba(255,255,255,.42);margin-bottom:6px;
}
.foot__data dd{margin:0;font-size:.98rem;color:#fff}
.foot__data a{text-decoration:none;transition:color .2s var(--ease)}
.foot__data a:hover{color:var(--cian)}

.foot__legal{font-size:.85rem;color:rgba(255,255,255,.42)}

/* =========================================================
   FAB WHATSAPP
   ========================================================= */
.fab{
  position:fixed;right:22px;bottom:22px;z-index:90;
  width:58px;height:58px;
  display:flex;align-items:center;justify-content:center;
  background:var(--wa);color:#fff;border-radius:50%;
  box-shadow:0 10px 26px rgba(0,0,0,.28);
  transition:background-color .2s var(--ease),transform .2s var(--ease);
}
.fab svg{width:30px;height:30px}
.fab::after{
  content:"";position:absolute;inset:0;border-radius:50%;
  border:2px solid var(--wa);
  animation:ring 2.2s var(--ease) 3 both;animation-delay:1.6s;
}
@keyframes ring{
  0%{opacity:.7;transform:scale(1)}
  70%,100%{opacity:0;transform:scale(1.75)}
}
.fab:hover{background:var(--wa-dark);transform:translateY(-2px)}

/* =========================================================
   APARICIONES
   La clase .reveal la agrega el JS: sin JS, todo se ve igual.
   ========================================================= */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

.sit:nth-child(2),.ledger__row:nth-child(2),.trio div:nth-child(2){transition-delay:.09s}
.sit:nth-child(3),.ledger__row:nth-child(3),.trio div:nth-child(3){transition-delay:.18s}
.ledger__row:nth-child(4){transition-delay:.27s}
.ledger__row:nth-child(5){transition-delay:.36s}
.why__txt p:nth-child(2){transition-delay:.12s}

/* secuencia de carga del hero */
@keyframes rise{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.hero__copy > *,.cascade,.pillars li{animation:rise .7s var(--ease) both}
.hero__copy > :nth-child(1){animation-delay:.05s}
.hero__copy > :nth-child(2){animation-delay:.14s}
.hero__copy > :nth-child(3){animation-delay:.23s}
.hero__copy > :nth-child(4){animation-delay:.32s}
.cascade{animation-delay:.3s}
.pillars li:nth-child(1){animation-delay:.5s}
.pillars li:nth-child(2){animation-delay:.58s}
.pillars li:nth-child(3){animation-delay:.66s}

/* el bloque de propuesta: la regla lateral crece */
.claim{position:relative;border-left-color:transparent}
.claim::before{
  content:"";position:absolute;left:-2px;top:0;bottom:0;width:2px;
  background:var(--cian);transform:scaleY(0);transform-origin:top;
  transition:transform .7s var(--ease);
}
.claim.is-in::before{transform:scaleY(1)}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width:1024px){
  .hero__in{grid-template-columns:1fr;gap:48px}
  .hero h1{max-width:18ch}
  .cascade{max-width:560px}
  .why{grid-template-columns:1fr}
  .why h2{max-width:22ch}
}

@media (max-width:900px){
  :root{--head-h:70px}
  .burger{display:block}
  .nav{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(10,18,34,.98);
    border-top:1px solid var(--line-dark);
    padding:8px var(--gut) 22px;
    backdrop-filter:blur(12px);
    display:none;
  }
  .nav.is-open{display:flex}
  .nav a{padding:15px 0;border-bottom:1px solid var(--line-dark);font-size:1rem}
  .nav__cta{margin-top:18px;border-bottom:0;justify-content:center}
  .head{background:rgba(15,23,42,.94)}

  .situations{grid-template-columns:1fr;gap:0}
  .sit{padding:24px 0}
  .sit:last-child{border-bottom:1px solid var(--line);padding-bottom:28px}
  .sit::before{width:44px}

  .ledger__row{grid-template-columns:1fr;gap:12px}
  .step{grid-template-columns:1fr;gap:14px}
  .trio{grid-template-columns:1fr;gap:0}
  .trio div{padding:16px 0;border-bottom:1px solid var(--line)}
  .trio div:last-child{border-bottom:0}
  .trio dt{border-bottom:0;padding-bottom:4px;margin-bottom:4px}

  .pillars{grid-template-columns:1fr;gap:0}
  .pillars li{padding:14px 0;border-bottom:1px solid var(--line-dark)}
  .pillars li:last-child{border-bottom:0}

  .contact__in{grid-template-columns:1fr;align-items:start}
  .foot__data{grid-template-columns:1fr;gap:20px}
}

@media (max-width:640px){
  body{font-size:16px}
  .hero{padding-top:calc(var(--head-h) + 48px)}
  .hero__acts .btn{flex:1 1 100%}
  .cascade{padding:22px 20px 20px}
  .claim{padding:24px 22px;font-size:1.05rem}
  .fab{width:52px;height:52px;right:16px;bottom:16px}
  .fab svg{width:27px;height:27px}
}

/* =========================================================
   MOVIMIENTO REDUCIDO
   ========================================================= */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-delay:0ms !important;
    transition-duration:.001ms !important;
  }
  .cascade__bar,.cascade.is-in .cascade__bar{width:var(--h);animation:none}
  .reveal{opacity:1;transform:none}
  .ledger__row::before,.step::before,.sit::before,.claim::before{transform:none}
  .fab::after{display:none}
  .head::after{transition:none}
}