/* ============================================================
   TressyAI — estilos
   TOKENS: cambiar acá cuando se defina el branding final.
   ============================================================ */
:root{
  --ink:      #0B1411;
  --ink-2:    #101E19;
  --ink-3:    #162922;
  --cream:    #EFE9DB;
  --muted:    #8FA39A;
  --brass:    #C9A227;
  --rule:     rgba(239,233,219,.14);

  --chat-bg:   #0A1512;
  --bub-in:    #1B2C26;
  --bub-out:   #0F4A38;
  --wa:        #25D366;

  --display: "Bricolage Grotesque", Georgia, serif;
  --body:    "Instrument Sans", system-ui, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, monospace;

  --nav-h: 68px;
  color-scheme: dark;
}

*{box-sizing:border-box}
html{scroll-behavior:auto; scroll-padding-top:var(--nav-h)}
body{
  margin:0; background:var(--ink); color:var(--cream);
  font-family:var(--body); font-size:17px; line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:inherit}
.wrap{max-width:1180px; margin:0 auto; padding:0 32px}

.eyebrow{
  font-family:var(--mono); font-size:11px; letter-spacing:.14em;
  text-transform:uppercase; color:var(--brass); margin:0 0 18px;
}
.section{padding:140px 0; border-top:1px solid var(--rule)}
.section-head{margin-bottom:64px}
.section-head h2,
.h2{
  font-family:var(--display); font-weight:700; font-size:clamp(34px,5vw,60px);
  letter-spacing:-.025em; line-height:1.02; margin:0 0 20px; max-width:16ch;
}
.section-head h2 em, .h2 em{font-style:normal; color:var(--brass)}
.section-head p{color:var(--muted); max-width:52ch; margin:0}

/* ---------- botones ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--mono); font-size:12px; letter-spacing:.1em; text-transform:uppercase;
  text-decoration:none; padding:15px 22px; border-radius:40px;
  border:1px solid transparent; cursor:pointer; background:none; color:var(--cream);
  transition:background .25s ease, color .25s ease, border-color .25s ease, transform .25s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--brass); color:#14100A}
.btn-primary:hover{background:#DDB638}
.btn-ghost{border-color:var(--rule)}
.btn-ghost:hover{border-color:var(--brass); color:var(--brass)}
.btn .arr{transition:transform .25s ease}
.btn:hover .arr{transform:translateX(4px)}

/* ============================================================
   NAV
   ============================================================ */
.nav{
  position:fixed; top:0; left:0; right:0; z-index:50;
  padding-top:env(safe-area-inset-top,0px);
  background:rgba(11,20,17,.72);
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:transform .4s ease, border-color .4s ease;
}
.nav.scrolled{border-bottom-color:var(--rule)}
.nav.hidden{transform:translateY(-100%)}
.nav-inner{height:var(--nav-h); display:flex; align-items:center; justify-content:space-between; gap:24px}
.brand{
  font-family:var(--display); font-weight:700; font-size:22px; letter-spacing:-.02em;
  text-decoration:none; display:flex; align-items:center; gap:10px;
}
.brand-mark{
  width:28px; height:28px; border-radius:50%;
  background:linear-gradient(140deg,#C9A227,#7A5E12);
  display:grid; place-items:center; font-size:13px; color:#14100A;
}
.brand b{color:var(--brass); font-weight:inherit}
.nav-links{display:flex; align-items:center; gap:30px; list-style:none; margin:0; padding:0}
.nav-links a{
  font-family:var(--mono); font-size:11px; letter-spacing:.12em; text-transform:uppercase;
  text-decoration:none; color:var(--muted); transition:color .2s ease;
}
.nav-links a:hover{color:var(--cream)}
.nav-links .btn{padding:11px 18px; color:#14100A}
.nav-toggle{
  display:none; width:42px; height:42px; border-radius:50%;
  background:none; border:1px solid var(--rule); cursor:pointer; position:relative;
}
.nav-toggle span{
  position:absolute; left:12px; right:12px; height:1.5px; background:var(--cream);
  transition:transform .3s ease, opacity .3s ease;
}
.nav-toggle span:nth-child(1){top:15px}
.nav-toggle span:nth-child(2){top:20px}
.nav-toggle span:nth-child(3){top:25px}
.nav.open .nav-toggle span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.nav.open .nav-toggle span:nth-child(2){opacity:0}
.nav.open .nav-toggle span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ============================================================
   HERO
   ============================================================ */
.hero{min-height:100svh; display:flex; align-items:center; position:relative; overflow:hidden; padding:calc(var(--nav-h) + 40px) 0 100px}
.hero::before{ /* brillo sutil */
  content:""; position:absolute; right:-10%; top:10%; width:60vw; height:60vw; max-width:760px; max-height:760px;
  background:radial-gradient(circle, rgba(201,162,39,.10), transparent 62%);
  pointer-events:none;
}
.hero h1{
  font-family:var(--display); font-weight:700; font-size:clamp(44px,7vw,88px);
  line-height:.98; letter-spacing:-.03em; margin:0 0 24px; max-width:15ch;
}
.hero h1 em{font-style:normal; color:var(--brass)}
.hero .lead{max-width:46ch; color:var(--muted); font-size:19px; margin:0 0 38px}
.hero-ctas{display:flex; flex-wrap:wrap; gap:14px}
.hero-meta{
  margin-top:56px; display:flex; flex-wrap:wrap; gap:10px 28px;
  font-family:var(--mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--muted);
}
.hero-meta span{display:flex; align-items:center; gap:10px}
.hero-meta span::before{content:""; width:6px; height:6px; border-radius:50%; background:#4FD6A4; box-shadow:0 0 0 4px rgba(79,214,164,.14)}
.scroll-cue{
  position:absolute; left:32px; bottom:40px;
  font-family:var(--mono); font-size:11px; letter-spacing:.12em;
  text-transform:uppercase; color:var(--muted); text-decoration:none;
  display:flex; align-items:center; gap:10px;
}
.scroll-cue span{display:block; width:44px; height:1px; background:var(--rule); position:relative; overflow:hidden}
.scroll-cue span::after{
  content:""; position:absolute; inset:0; background:var(--brass);
  transform:translateX(-100%); animation:cue 2.2s ease-in-out infinite;
}
@keyframes cue{0%{transform:translateX(-100%)}60%,100%{transform:translateX(100%)}}

/* ============================================================
   PROBLEMA
   ============================================================ */
.problems{display:grid; grid-template-columns:repeat(3,1fr); border-top:1px solid var(--rule)}
.problem{padding:34px 34px 10px 0; border-right:1px solid var(--rule)}
.problem + .problem{padding-left:34px}
.problem:last-child{border-right:none}
.problem .num{font-family:var(--mono); font-size:11px; color:var(--brass); letter-spacing:.1em}
.problem h3{font-family:var(--display); font-weight:700; font-size:24px; line-height:1.12; letter-spacing:-.015em; margin:16px 0 12px}
.problem p{color:var(--muted); margin:0; font-size:16px}
.problems-close{
  margin:64px 0 0; font-family:var(--display); font-weight:500;
  font-size:clamp(22px,2.6vw,32px); line-height:1.25; letter-spacing:-.015em; max-width:30ch;
}
.problems-close em{font-style:normal; color:var(--brass)}

/* ============================================================
   SECCIÓN PINNED (del boceto)
   La altura de .pin es la "duración" de la animación.
   ============================================================ */
.pin{position:relative; height:520svh; border-top:1px solid var(--rule)}
.stage{
  position:sticky; top:0; height:100svh;
  display:grid; grid-template-columns:1fr 380px; gap:64px; align-items:center;
  max-width:1180px; margin:0 auto; padding:0 32px;
}

.ledger{position:relative}
.rail{display:flex; flex-direction:column; gap:0; margin-bottom:40px; border-top:1px solid var(--rule)}
.rail-item{
  display:flex; align-items:baseline; gap:16px;
  padding:11px 0; border-bottom:1px solid var(--rule);
  font-family:var(--mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase;
  color:var(--muted); opacity:.45; transition:opacity .4s ease, color .4s ease;
}
.rail-item .num{color:var(--brass); opacity:.5; transition:opacity .4s ease}
.rail-item .bar{flex:1; height:1px; background:var(--rule); position:relative; overflow:hidden}
.rail-item .bar i{
  position:absolute; inset:0; background:var(--brass);
  transform:scaleX(0); transform-origin:left; display:block;
}
.rail-item.on{opacity:1; color:var(--cream)}
.rail-item.on .num{opacity:1}

.copy-deck{position:relative; min-height:290px}
.chapter{
  position:absolute; inset:0; opacity:0; transform:translateY(22px);
  transition:opacity .5s ease, transform .5s ease; pointer-events:none;
}
.chapter.on{opacity:1; transform:none; pointer-events:auto}
.chapter h2{
  font-family:var(--display); font-weight:700; font-size:clamp(32px,3.6vw,50px);
  line-height:1.02; letter-spacing:-.025em; margin:0 0 18px; max-width:14ch;
}
.chapter p{color:var(--muted); max-width:40ch; margin:0 0 26px}
.chapter ul{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:9px}
.chapter li{
  font-family:var(--mono); font-size:12px; letter-spacing:.04em; color:var(--cream);
  display:flex; gap:12px; align-items:center;
}
.chapter li::before{content:""; width:14px; height:1px; background:var(--brass); flex:none}

/* ---------- el teléfono ---------- */
.phone-holder{display:flex; justify-content:center; will-change:transform}
.phone{
  width:340px; height:min(700px, 82svh); position:relative;
  border-radius:44px; padding:11px;
  background:linear-gradient(160deg,#2B2A26,#141513 40%,#33302A);
  box-shadow:0 40px 80px -30px rgba(0,0,0,.9), 0 0 0 1px rgba(201,162,39,.22);
}
.screen{
  width:100%; height:100%; border-radius:34px; overflow:hidden;
  background:var(--chat-bg); display:flex; flex-direction:column; position:relative;
}
.notch{
  position:absolute; top:9px; left:50%; transform:translateX(-50%);
  width:96px; height:22px; border-radius:12px; background:#0A0A0A; z-index:5;
}
.bar-top{
  padding:16px 16px 8px; display:flex; justify-content:space-between;
  font-family:var(--mono); font-size:10px; color:var(--muted); flex:none;
}
.chat-head{
  display:flex; align-items:center; gap:11px; padding:8px 14px 12px;
  border-bottom:1px solid rgba(255,255,255,.07); flex:none;
}
.avatar{
  width:36px; height:36px; border-radius:50%; flex:none;
  background:linear-gradient(140deg,#C9A227,#7A5E12);
  display:grid; place-items:center;
  font-family:var(--display); font-weight:700; font-size:14px; color:#14100A;
}
.chat-head b{display:block; font-family:var(--body); font-weight:500; font-size:14px}
.chat-head small{
  display:block; font-family:var(--mono); font-size:10px; color:#4FD6A4;
  transition:opacity .4s ease;
}
.screen-body{flex:1; position:relative; overflow:hidden}
.screen-body::after{
  content:""; position:absolute; top:0; left:0; right:0; height:40px; z-index:3;
  background:linear-gradient(var(--chat-bg),transparent); pointer-events:none;
}
.thread{
  position:absolute; left:0; right:0; top:0; padding:14px 12px 10px;
  display:flex; flex-direction:column; gap:8px;
  opacity:0; visibility:hidden;
  transition:opacity .35s ease;
  will-change:transform;
}
.thread.on{opacity:1; visibility:visible}
.row{
  display:flex; opacity:0; transform:translateY(14px) scale(.96);
  transition:opacity .35s ease, transform .45s cubic-bezier(.2,.8,.2,1);
}
.row.in{opacity:1; transform:none}
.row.out{justify-content:flex-end}
.bub{
  max-width:78%; padding:8px 11px 6px; border-radius:14px;
  font-size:13.5px; line-height:1.42; position:relative;
}
.row.in-msg .bub{background:var(--bub-in); border-top-left-radius:4px}
.row.out .bub{background:var(--bub-out); border-top-right-radius:4px}
.bub time{
  display:block; text-align:right; font-family:var(--mono);
  font-size:9px; color:rgba(239,233,219,.45); margin-top:3px;
}
.bub time b{color:#5AB8F0; font-weight:400; letter-spacing:-.5px}
.row.chip{justify-content:center}
.row.chip span{
  font-family:var(--mono); font-size:9.5px; letter-spacing:.08em; text-transform:uppercase;
  background:rgba(201,162,39,.13); color:var(--brass);
  padding:5px 11px; border-radius:20px; border:1px solid rgba(201,162,39,.22);
}
.row.day span{background:rgba(255,255,255,.06); color:var(--muted); border-color:transparent}
.typing{display:flex; gap:4px; padding:11px 13px; background:var(--bub-in);
  border-radius:14px; border-top-left-radius:4px}
.typing i{width:5px; height:5px; border-radius:50%; background:var(--muted); display:block;
  animation:dot 1.2s infinite}
.typing i:nth-child(2){animation-delay:.15s}
.typing i:nth-child(3){animation-delay:.3s}
@keyframes dot{0%,60%,100%{opacity:.3; transform:translateY(0)}30%{opacity:1; transform:translateY(-3px)}}
.bar-input{
  flex:none; padding:10px 12px 16px; display:flex; gap:8px; align-items:center;
  border-top:1px solid rgba(255,255,255,.07);
}
.fake-input{
  flex:1; height:34px; border-radius:18px; background:var(--bub-in);
  display:flex; align-items:center; padding:0 14px;
  font-size:12.5px; color:rgba(239,233,219,.3);
}
.send{width:34px; height:34px; border-radius:50%; background:var(--bub-out); flex:none;
  display:grid; place-items:center; color:var(--cream); font-size:13px}

/* ============================================================
   SERVICIOS
   ============================================================ */
.services{display:grid; grid-template-columns:repeat(3,1fr); gap:20px}
.service{
  background:var(--ink-2); border:1px solid var(--rule); border-radius:22px;
  padding:34px 30px 32px; display:flex; flex-direction:column;
  transition:border-color .3s ease, transform .3s ease;
}
.service:hover{border-color:rgba(201,162,39,.45); transform:translateY(-4px)}
.service .num{font-family:var(--mono); font-size:11px; letter-spacing:.1em; color:var(--brass)}
.service h3{font-family:var(--display); font-weight:700; font-size:27px; line-height:1.08; letter-spacing:-.02em; margin:44px 0 14px}
.service p{color:var(--muted); font-size:15.5px; margin:0 0 26px}
.service ul{list-style:none; margin:auto 0 0; padding:20px 0 0; border-top:1px solid var(--rule); display:flex; flex-direction:column; gap:9px}
.service li{font-family:var(--mono); font-size:11.5px; letter-spacing:.03em; display:flex; gap:12px; align-items:center}
.service li::before{content:""; width:14px; height:1px; background:var(--brass); flex:none}

/* ---------- otros rubros ---------- */
.rubros{
  margin-top:20px; background:var(--ink-3); border-radius:22px; border:1px solid var(--rule);
  padding:40px; display:grid; grid-template-columns:1fr 1.3fr; gap:40px; align-items:center;
}
.rubros h3{font-family:var(--display); font-weight:700; font-size:28px; letter-spacing:-.02em; line-height:1.1; margin:0 0 10px}
.rubros p{color:var(--muted); margin:0; font-size:16px}
.chips{display:flex; flex-wrap:wrap; gap:10px}
.chips span{
  font-family:var(--mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase;
  padding:9px 15px; border-radius:30px; border:1px solid var(--rule); color:var(--cream);
}
.chips span.main{border-color:rgba(201,162,39,.4); background:rgba(201,162,39,.12); color:var(--brass)}

/* ============================================================
   PROCESO
   ============================================================ */
.process-grid{display:grid; grid-template-columns:1fr 1.25fr; gap:80px; align-items:start}
.process-intro{position:sticky; top:calc(var(--nav-h) + 40px)}
.process-intro p{color:var(--muted); max-width:44ch}
.steps{list-style:none; margin:0; padding:0; position:relative}
.steps::before{content:""; position:absolute; left:19px; top:10px; bottom:10px; width:1px; background:var(--rule)}
.step{display:grid; grid-template-columns:40px 1fr; gap:24px; padding:0 0 48px; position:relative}
.step:last-child{padding-bottom:0}
.step .dot{
  width:40px; height:40px; border-radius:50%; background:var(--ink);
  border:1px solid rgba(201,162,39,.45); display:grid; place-items:center;
  font-family:var(--mono); font-size:11px; color:var(--brass); position:relative; z-index:1;
}
.step h3{font-family:var(--display); font-weight:700; font-size:24px; letter-spacing:-.015em; line-height:1.15; margin:6px 0 10px}
.step p{color:var(--muted); margin:0; font-size:16px}

/* ============================================================
   TESTIMONIOS
   ============================================================ */
.quote{
  max-width:900px; margin:0 auto; text-align:center;
}
.quote .stars{color:var(--brass); letter-spacing:6px; font-size:15px; margin-bottom:28px}
.quote blockquote{
  margin:0; font-family:var(--display); font-weight:500;
  font-size:clamp(26px,3.6vw,42px); line-height:1.18; letter-spacing:-.02em;
}
.quote blockquote::before{content:"“"; color:var(--brass)}
.quote blockquote::after{content:"”"; color:var(--brass)}
.quote figcaption{margin-top:30px; display:flex; align-items:center; justify-content:center; gap:14px}
.quote figcaption b{display:block; font-weight:500; text-align:left}
.quote figcaption small{display:block; font-family:var(--mono); font-size:11px; letter-spacing:.08em; color:var(--muted); text-transform:uppercase; text-align:left}

/* ============================================================
   EQUIPO
   ============================================================ */
.team-grid{display:grid; grid-template-columns:1fr 1fr; gap:80px; align-items:start}
.about p{color:var(--muted); max-width:48ch; margin:0 0 18px}
.about .remote{
  display:inline-flex; align-items:center; gap:10px; margin-top:10px;
  font-family:var(--mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--cream);
  padding:9px 15px; border:1px solid var(--rule); border-radius:30px;
}
.about .remote::before{content:""; width:6px; height:6px; border-radius:50%; background:#4FD6A4}
.people{display:flex; flex-direction:column; gap:16px}
.person{
  display:grid; grid-template-columns:72px 1fr; gap:22px; align-items:start;
  background:var(--ink-2); border:1px solid var(--rule); border-radius:22px; padding:26px;
}
.person .avatar{width:72px; height:72px; font-size:24px}
.person h3{font-family:var(--display); font-weight:700; font-size:22px; letter-spacing:-.015em; margin:2px 0 2px}
.person .role{font-family:var(--mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase; color:var(--brass); margin:0 0 12px}
.person p{color:var(--muted); font-size:15.5px; margin:0}

/* ============================================================
   FAQ
   ============================================================ */
.faq-grid{display:grid; grid-template-columns:1fr 1.5fr; gap:80px; align-items:start}
.faq-list{border-top:1px solid var(--rule)}
.faq-list details{border-bottom:1px solid var(--rule)}
.faq-list summary{
  list-style:none; cursor:pointer; padding:24px 44px 24px 0; position:relative;
  font-family:var(--display); font-weight:500; font-size:20px; letter-spacing:-.01em; line-height:1.3;
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{
  content:"+"; position:absolute; right:4px; top:50%; transform:translateY(-50%);
  font-family:var(--mono); font-size:20px; color:var(--brass); transition:transform .3s ease;
}
.faq-list details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-list details p{color:var(--muted); margin:0; padding:0 44px 26px 0; max-width:60ch}

/* ============================================================
   CONTACTO
   ============================================================ */
.contact-grid{display:grid; grid-template-columns:1fr 1.15fr; gap:80px; align-items:start}
.contact-info p{color:var(--muted); max-width:42ch}
.contact-list{list-style:none; margin:40px 0 0; padding:0; border-top:1px solid var(--rule)}
.contact-list li{padding:18px 0; border-bottom:1px solid var(--rule); display:flex; justify-content:space-between; gap:20px; flex-wrap:wrap}
.contact-list small{font-family:var(--mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--muted)}
.contact-list a{text-decoration:none; transition:color .2s ease}
.contact-list a:hover{color:var(--brass)}

.form{
  background:var(--ink-2); border:1px solid var(--rule); border-radius:24px; padding:36px;
  display:grid; grid-template-columns:1fr 1fr; gap:18px;
}
.field{display:flex; flex-direction:column; gap:8px}
.field.full{grid-column:1/-1}
.field label, .field legend{font-family:var(--mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--muted)}
.field input, .field select, .field textarea{
  font:inherit; font-size:16px; color:var(--cream);
  background:var(--ink); border:1px solid var(--rule); border-radius:12px;
  padding:13px 15px; outline:none; transition:border-color .2s ease;
  width:100%;
}
.field select{appearance:none; background-image:linear-gradient(45deg,transparent 50%,var(--brass) 50%),linear-gradient(135deg,var(--brass) 50%,transparent 50%);
  background-position:calc(100% - 20px) 50%, calc(100% - 15px) 50%; background-size:5px 5px; background-repeat:no-repeat; padding-right:40px}
.field textarea{resize:vertical; min-height:110px}
.field input:focus, .field select:focus, .field textarea:focus{border-color:var(--brass)}
fieldset.field{border:none; margin:0; padding:0}
.seg{display:flex; gap:10px; flex-wrap:wrap}
.seg label{
  flex:1; min-width:140px; cursor:pointer; text-transform:none; letter-spacing:0;
  font-family:var(--body); font-size:15px; color:var(--cream);
  border:1px solid var(--rule); border-radius:12px; padding:12px 14px;
  display:flex; align-items:center; gap:10px; transition:border-color .2s ease, background .2s ease;
}
.seg input{accent-color:var(--brass); width:auto; margin:0}
.seg label:has(input:checked){border-color:var(--brass); background:rgba(201,162,39,.08)}
.seg small{display:block; font-family:var(--mono); font-size:10px; color:var(--muted); letter-spacing:.06em; text-transform:uppercase}
.form .btn{grid-column:1/-1; justify-content:center; padding:17px 22px}
.form-note{grid-column:1/-1; margin:0; font-size:13px; color:var(--muted); text-align:center}

/* ============================================================
   CIERRE + FOOTER
   ============================================================ */
.closing{padding:160px 0 120px; border-top:1px solid var(--rule); text-align:center; position:relative; overflow:hidden}
.closing::before{
  content:""; position:absolute; left:50%; top:30%; transform:translate(-50%,-50%);
  width:900px; height:900px; max-width:120vw;
  background:radial-gradient(circle, rgba(201,162,39,.09), transparent 60%); pointer-events:none;
}
.closing h2{
  font-family:var(--display); font-weight:700; font-size:clamp(42px,7.5vw,104px);
  line-height:.96; letter-spacing:-.035em; margin:0 auto 40px; max-width:14ch; position:relative;
}
.closing h2 em{font-style:normal; color:var(--brass)}
.closing .hero-ctas{justify-content:center; position:relative}

.footer{border-top:1px solid var(--rule); padding:40px 0 calc(40px + env(safe-area-inset-bottom,0px))}
.footer-inner{display:flex; justify-content:space-between; align-items:center; gap:20px; flex-wrap:wrap}
.footer small, .footer a{font-family:var(--mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--muted); text-decoration:none}
.footer a:hover{color:var(--brass)}
.footer-links{display:flex; gap:24px; flex-wrap:wrap}

/* ---------- barra CTA fija ---------- */
.cta-bar{
  position:fixed; left:50%; bottom:calc(20px + env(safe-area-inset-bottom,0px)); z-index:40;
  display:flex; align-items:center; gap:8px; padding:6px;
  background:rgba(11,20,17,.8); backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  border:1px solid var(--rule); border-radius:50px;
  box-shadow:0 18px 40px -14px rgba(0,0,0,.8);
  opacity:0; transform:translate(-50%,120%); pointer-events:none;
  transition:opacity .35s ease, transform .45s cubic-bezier(.2,.8,.2,1);
}
.cta-bar.show{opacity:1; transform:translate(-50%,0); pointer-events:auto}
.cta-bar .btn{white-space:nowrap}
.cta-bar .btn:hover{transform:none}
.cta-wa{
  width:48px; height:48px; border-radius:50%; background:var(--wa); flex:none;
  display:grid; place-items:center; color:#fff;
  transition:transform .25s ease;
}
.cta-wa:hover{transform:scale(1.07)}
.cta-wa svg{width:26px; height:26px}

/* ---------- reveal on scroll ---------- */
/* el contenido siempre es visible; sólo se desliza al entrar */
.reveal{transform:translateY(24px); transition:transform .8s cubic-bezier(.2,.8,.2,1)}
.reveal.visible{transform:none}
.reveal-d1{transition-delay:.08s}
.reveal-d2{transition-delay:.16s}

/* ============================================================
   MOBILE
   ============================================================ */
@media (max-width:900px){
  :root{--nav-h:62px}
  .wrap{padding:0 22px}
  .section{padding:96px 0}
  .section-head{margin-bottom:44px}

  .nav-toggle{display:block}
  .nav-links{
    position:absolute; top:100%; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:0;
    background:var(--ink); border-bottom:1px solid var(--rule);
    padding:8px 22px 22px;
    opacity:0; visibility:hidden; transform:translateY(-8px);
    transition:opacity .25s ease, transform .25s ease, visibility .25s;
  }
  .nav.open .nav-links{opacity:1; visibility:visible; transform:none}
  .nav-links li{border-bottom:1px solid var(--rule)}
  .nav-links li:last-child{border-bottom:none; padding-top:18px}
  .nav-links a{display:block; padding:16px 0; font-size:12px}
  .nav-links .btn{display:flex; justify-content:center; padding:15px}

  .hero .lead{font-size:17px}
  .scroll-cue{left:22px; bottom:28px}
  .hero-meta{margin-top:40px}

  .problems{grid-template-columns:1fr}
  .problem, .problem + .problem{padding:28px 0; border-right:none; border-bottom:1px solid var(--rule)}

  .stage{
    grid-template-columns:1fr; gap:20px; padding:0 22px;
    align-content:center; justify-items:center;
    padding-bottom:72px; /* lugar para la barra CTA */
  }
  .phone-holder{order:1}
  .phone{width:265px; height:min(540px,48svh); padding:8px; border-radius:36px}
  .screen{border-radius:28px}
  .ledger{order:2; width:100%}
  .rail{display:none}
  .copy-deck{min-height:230px}
  .chapter h2{font-size:26px; margin-bottom:10px}
  .chapter p{font-size:15px; margin-bottom:14px}
  .chapter ul{flex-direction:row; flex-wrap:wrap; gap:8px 16px}
  .chapter li{font-size:10.5px}
  .pin{height:480svh}

  .services{grid-template-columns:1fr}
  .service h3{margin-top:28px}
  .rubros{grid-template-columns:1fr; padding:28px; gap:24px}

  .process-grid, .team-grid, .faq-grid, .contact-grid{grid-template-columns:1fr; gap:44px}
  .process-intro{position:static}

  .person{grid-template-columns:56px 1fr; gap:16px; padding:22px}
  .person .avatar{width:56px; height:56px; font-size:19px}

  .faq-list summary{font-size:18px}

  .form{grid-template-columns:1fr; padding:24px}
  .closing{padding:110px 0 90px}
  .cta-bar{left:16px; right:16px; bottom:calc(14px + env(safe-area-inset-bottom,0px)); transform:translateY(120%)}
  .cta-bar.show{transform:none}
  .cta-bar .btn{flex:1; justify-content:center}
  .cta-wa{width:46px; height:46px}
}
/* celulares bajos: que el capítulo no quede tapado por la barra CTA */
@media (max-width:900px) and (max-height:740px){
  .phone{height:42svh}
  .stage{gap:14px}
  .chapter h2{font-size:23px}
  .chapter p{font-size:14px; line-height:1.5}
}
@media (max-width:420px){
  .wrap, .stage{padding-left:18px; padding-right:18px}
  .hero-ctas .btn{width:100%; justify-content:center}
}

@media (prefers-reduced-motion:reduce){
  .row,.chapter,.thread,.phone-holder,.reveal,.btn,.service,.nav,.cta-bar{transition:none !important}
  .reveal{transform:none}
  .scroll-cue span::after,.typing i{animation:none}
}