/* ===== Ing Nahui · estilos ===== */
:root{
  --ink:#14181d; --ink2:#1d232a; --paper:#f6f3ee; --paper2:#ece6dc; --white:#fffdf9;
  --text:#1b1f24; --muted:#5d6670; --line:#ddd5c8;
  --brass:#b0813f; --brass2:#d6a865; --blue:#3e7bd6; --ok:#2f7d5b; --warn:#a4462f;
  --r:18px; --max:1160px;
  --serif:"Fraunces",Georgia,serif; --sans:Manrope,system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--text);font:16.5px/1.65 var(--sans);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--serif);font-weight:600;letter-spacing:-.02em;line-height:1.12;margin:0}
h1{font-size:clamp(34px,5.4vw,60px)}
h2{font-size:clamp(28px,3.8vw,42px)}
h3{font-size:21px}
p{margin:0 0 14px}
:focus-visible{outline:2px solid var(--brass);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px;top:8px;background:var(--brass);color:#fff;padding:8px 12px;border-radius:8px;z-index:30}
.skip:focus{left:8px}
.in-w{width:min(var(--max),100% - 32px);margin:0 auto}
.hp{position:absolute;left:-9999px}

/* encabezado */
.top{position:sticky;top:0;z-index:20;background:rgba(20,24,29,.94);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.06)}
.top-in{width:min(var(--max),100% - 32px);margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}
.logo img{height:44px;width:auto}
.menu{display:flex;align-items:center;gap:4px}
.menu a{color:#d8dde3;text-decoration:none;font-weight:600;font-size:14.5px;padding:8px 12px;border-radius:999px}
.menu a:hover,.menu a[aria-current]{color:#fff;background:rgba(255,255,255,.08)}
.menu .menu-cta{background:var(--brass);color:#fff;margin-left:8px}
.menu .menu-cta:hover{background:var(--brass2);color:var(--ink)}
.burger{display:none;background:none;border:0;width:44px;height:44px;padding:10px;cursor:pointer}
.burger span{display:block;height:2px;background:#fff;margin:6px 0;border-radius:2px;transition:transform .2s}
@media (max-width:900px){
  .burger{display:block}
  .menu{position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;background:var(--ink);padding:10px 16px 18px;display:none;border-bottom:1px solid rgba(255,255,255,.08)}
  .menu.open{display:flex}
  .menu a{padding:12px 10px;font-size:16px}
  .menu .menu-cta{margin:8px 0 0;text-align:center}
}

/* botones */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--brass);color:#fff;text-decoration:none;font-weight:700;
  padding:15px 24px;border-radius:999px;border:0;font:700 16px var(--sans);cursor:pointer;transition:transform .15s,background .15s;text-align:center}
.btn:hover{background:#9a6f33;transform:translateY(-1px)}
.btn-line{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn-line:hover{background:var(--ink);color:#fff}
.dark .btn-line,.hero .btn-line{color:#fff;border-color:rgba(255,255,255,.5)}
.dark .btn-line:hover,.hero .btn-line:hover{background:#fff;color:var(--ink)}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* hero */
.hero{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:32px 32px;mask-image:linear-gradient(180deg,#000,transparent 85%)}
.hero-in{position:relative;width:min(var(--max),100% - 32px);margin:0 auto;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding:72px 0 80px}
.hero p.lead{font-size:19px;color:#c9d0d8;max-width:560px;margin-top:20px}
.hero h1 em{font-style:italic;color:var(--brass2)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--brass2);font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;margin-bottom:18px}
.eyebrow::before{content:"";width:18px;height:1.5px;background:currentColor}
.light .eyebrow,.sec .eyebrow{color:var(--brass)}
.hero-img{border-radius:24px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.45);border:1px solid rgba(255,255,255,.08);margin:0}
.hero-img img{width:100%;aspect-ratio:4/3;object-fit:cover}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px;padding:0;list-style:none}
.chips li{font-size:13.5px;color:#d9dee4;border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:6px 12px}
@media (max-width:900px){.hero-in{grid-template-columns:1fr;gap:32px;padding:44px 0 52px}.hero p.lead{font-size:17.5px}}

/* secciones */
.sec{padding:88px 0}
.sec.alt{background:var(--white)}
.sec.dark{background:var(--ink2);color:#fff}
.sec.dark p{color:#c9d0d8}
.sec-head{max-width:740px;margin-bottom:44px}
.sec-head p{color:var(--muted);font-size:18px;margin-top:16px}
.dark .sec-head p{color:#c9d0d8}
.center{text-align:center;margin-left:auto;margin-right:auto}
@media (max-width:700px){.sec{padding:60px 0}}

.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)} .g3{grid-template-columns:repeat(3,1fr)} .g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:980px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}

.card{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:28px}
.sec.alt .card{background:var(--paper)}
.dark .card{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.1)}
.card h3{margin-bottom:10px}
.card p{color:var(--muted);margin:0}
.dark .card p{color:#b9c1ca}
.num{font:600 15px var(--serif);color:var(--brass);display:block;margin-bottom:14px}

/* tarjetas de servicio (inicio) */
.serv{display:flex;flex-direction:column;text-decoration:none;background:var(--white);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:transform .2s,box-shadow .2s}
.serv:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(20,24,29,.12)}
.serv figure{margin:0;background:var(--ink)}
.serv img{width:100%;aspect-ratio:16/10;object-fit:cover}
.serv div{padding:22px 24px 26px}
.serv h3{margin-bottom:8px}
.serv p{color:var(--muted);margin:0 0 14px;font-size:15.5px}
.serv span{font-weight:700;color:var(--brass)}

/* listas */
.check,.cross{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.check li,.cross li{position:relative;padding-left:32px}
.check li::before{content:"";position:absolute;left:0;top:5px;width:20px;height:20px;border-radius:50%;background:var(--ok) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5.5 10.5l3 3 6-7' fill='none' stroke='white' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat}
.cross li::before{content:"";position:absolute;left:0;top:5px;width:20px;height:20px;border-radius:50%;background:var(--warn) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M6.5 6.5l7 7M13.5 6.5l-7 7' fill='none' stroke='white' stroke-width='2.2' stroke-linecap='round'/%3E%3C/svg%3E") center/16px no-repeat}

/* frase destacada */
.quote{font:500 clamp(24px,3.2vw,36px)/1.3 var(--serif);font-style:italic;max-width:900px;margin:0 auto;text-align:center}
.quote::before{content:"“";display:block;font-size:72px;line-height:.6;color:var(--brass);margin-bottom:10px}

/* pasos */
.steps{counter-reset:p;display:grid;gap:16px}
.step{display:grid;grid-template-columns:64px 1fr;gap:18px;align-items:start;padding:22px 0;border-top:1px solid var(--line)}
.dark .step{border-color:rgba(255,255,255,.12)}
.step::before{counter-increment:p;content:counter(p,decimal-leading-zero);font:600 30px var(--serif);color:var(--brass)}
.step h3{margin-bottom:6px}
.step p{color:var(--muted);margin:0}
.dark .step p{color:#b9c1ca}

/* ingeniero */
.about{display:grid;grid-template-columns:300px 1fr;gap:48px;align-items:center}
.about img{border-radius:50%;aspect-ratio:1;object-fit:cover;width:100%;max-width:300px;box-shadow:0 20px 50px rgba(0,0,0,.18)}
@media (max-width:760px){.about{grid-template-columns:1fr;gap:24px}.about img{max-width:200px}}

/* aviso */
.note{border-left:3px solid var(--brass);background:var(--white);padding:16px 20px;border-radius:0 12px 12px 0;color:var(--muted);font-size:15px}
.dark .note{background:rgba(255,255,255,.05);color:#c9d0d8}

/* precio */
.price{display:flex;align-items:baseline;gap:10px;margin:8px 0 4px}
.price b{font:600 48px var(--serif);color:var(--ink)}
.dark .price b{color:#fff}
.price s{color:var(--muted)}

/* faq */
.faq{display:grid;gap:12px;max-width:820px}
.faq details{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:4px 20px}
.sec.alt .faq details{background:var(--paper)}
.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::after{content:"+";font:400 24px/1 var(--sans);color:var(--brass)}
.faq details[open] summary::after{content:"–"}
.faq p{color:var(--muted);padding-bottom:12px}

/* formulario */
.form{display:grid;gap:14px;background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:28px;color:var(--text)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:640px){.form-row{grid-template-columns:1fr}.form{padding:20px}}
.form label{display:grid;gap:6px;font-weight:600;font-size:14.5px}
.form input,.form textarea,.form select{font:16px var(--sans);padding:13px 14px;border:1.5px solid var(--line);border-radius:12px;background:#fff;color:var(--text);width:100%}
.form input:focus,.form textarea:focus{border-color:var(--brass);outline:none}
.form .btn{width:100%}
.legal{font-size:13px;color:var(--muted);margin:0}
.err{background:#fbe9e5;color:var(--warn);padding:10px 14px;border-radius:10px;font-weight:600}

/* calculadora */
.calc{display:grid;grid-template-columns:1fr 1fr;gap:28px;background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:30px;color:var(--text)}
.calc label{display:grid;gap:6px;font-weight:600;font-size:14.5px;margin-bottom:14px}
.calc input,.calc select{font:16px var(--sans);padding:13px 14px;border:1.5px solid var(--line);border-radius:12px;width:100%}
.calc .res{background:var(--ink);color:#fff;border-radius:14px;padding:24px;display:grid;gap:14px;align-content:center}
.calc .res small{color:#aab3bd;display:block}
.calc .res strong{font:600 28px var(--serif)}
@media (max-width:760px){.calc{grid-template-columns:1fr;padding:20px}}

/* recursos */
.res-list{display:grid;gap:16px}
.res{display:flex;flex-direction:column;gap:8px;background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:24px;text-decoration:none}
.res.dest{border-color:var(--brass)}
.res small{color:var(--brass);font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:12px}
.res p{color:var(--muted);margin:0}
.res span{font-weight:700;color:var(--brass)}

/* cta final */
.final{text-align:center}
.final h2{max-width:760px;margin:0 auto}
.final p{max-width:620px;margin:16px auto 0}
.final .btns{justify-content:center}

/* pie */
.pie{background:var(--ink);color:#c9d0d8;padding:56px 0 28px;font-size:15px}
.pie-in{width:min(var(--max),100% - 32px);margin:0 auto;display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:32px}
.pie-logo{height:52px;width:auto;margin-bottom:12px}
.pie nav{display:grid;gap:8px;align-content:start}
.pie nav strong{color:#fff;font-size:13px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:4px}
.pie a{text-decoration:none}
.pie a:hover{color:#fff}
.copy{width:min(var(--max),100% - 32px);margin:36px auto 0;padding-top:20px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:#8b95a0}
@media (max-width:760px){.pie-in{grid-template-columns:1fr}}

/* whatsapp flotante y cta fijo */
.wa-float{position:fixed;right:18px;bottom:18px;z-index:25;width:56px;height:56px;border-radius:50%;background:#25d366;color:#fff;display:grid;place-items:center;box-shadow:0 10px 30px rgba(0,0,0,.25)}
.sticky-cta{position:fixed;left:12px;right:84px;bottom:18px;z-index:24;transform:translateY(140%);transition:transform .25s;display:none}
.sticky-cta .btn{width:100%;box-shadow:0 10px 30px rgba(0,0,0,.25);padding:14px 18px}
.sticky-cta.show{transform:none}
@media (max-width:760px){.sticky-cta{display:block}}

/* aparición suave */
.rv.pre{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.rv.pre.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}