:root{
  --carbon:#14181d; --panel:#1b2129; --panel2:#20272f; --line:#2b333e;
  --text:#e9ecf0; --mute:#9aa5b1; --spark:#ff8a1e; --spark2:#ffb35c; --steel:#4f8fc4;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--carbon);color:var(--text);font-family:'Barlow',sans-serif;font-size:16.5px;line-height:1.65}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:'Barlow Condensed',sans-serif;line-height:1.05;text-transform:uppercase;letter-spacing:.5px}

/* cordón de soldadura: firma visual */
.seam{height:4px;background:repeating-linear-gradient(90deg,var(--spark) 0 14px,transparent 14px 22px);border-radius:2px;opacity:.9}

/* NAV */
nav{position:sticky;top:0;z-index:50;background:rgba(20,24,29,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{height:44px;width:auto;border-radius:6px;display:block}
.nav-links{display:flex;gap:26px;font-size:14px;font-weight:500;letter-spacing:1.2px;text-transform:uppercase}
.nav-links a{color:var(--mute);transition:color .2s}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--spark)}
.nav-cta{background:var(--spark);color:#181205;padding:9px 18px;border-radius:6px;font-weight:600;font-size:14px;letter-spacing:1px;text-transform:uppercase;transition:background .2s}
.nav-cta:hover{background:var(--spark2)}
.nav-right{display:flex;align-items:center;gap:14px}
.lang-switch{display:flex;gap:2px;border:1px solid var(--line);border-radius:6px;padding:3px;background:rgba(27,33,41,.6)}
.lang-btn{background:none;border:none;color:var(--mute);font-family:'Barlow Condensed',sans-serif;font-size:12px;font-weight:600;letter-spacing:1px;padding:4px 9px;border-radius:4px;cursor:pointer;transition:background .2s,color .2s}
.lang-btn:hover{color:var(--text)}
.lang-btn.active{background:var(--spark);color:#181205}
@media(max-width:840px){.nav-links{display:none}}
@media(max-width:480px){.lang-btn{padding:4px 7px;font-size:11px}}

/* HERO */
header.hero{position:relative;min-height:88vh;display:flex;align-items:flex-end;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url("../img/hero.jpg") center 30%/cover no-repeat}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,24,29,.55) 0%,rgba(20,24,29,.35) 40%,rgba(20,24,29,.96) 92%)}
.hero-in{position:relative;padding:120px 0 70px;width:100%}
.hero-tag{display:inline-block;font-family:'Barlow Condensed';font-weight:600;font-size:15px;letter-spacing:4px;text-transform:uppercase;color:var(--spark);border:1px solid rgba(255,138,30,.5);padding:6px 14px;border-radius:4px;margin-bottom:22px}
.hero h1{font-size:clamp(46px,7.5vw,96px);font-weight:700;max-width:900px}
.hero h1 em{font-style:normal;color:var(--spark)}
.hero p.lead{max-width:640px;margin:22px 0 34px;color:#c7cdd5;font-size:18px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.btn{display:inline-block;padding:14px 28px;border-radius:6px;font-family:'Barlow Condensed';font-size:18px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;transition:transform .15s,background .2s}
.btn:hover{transform:translateY(-2px)}
.btn-fill{background:var(--spark);color:#181205}
.btn-line{border:1.5px solid var(--line);color:var(--text);background:rgba(20,24,29,.4)}
.btn-line:hover{border-color:var(--spark);color:var(--spark)}
.hero-norms{display:flex;flex-wrap:wrap;gap:10px}
.chip{font-family:'Barlow Condensed';font-size:15px;font-weight:600;letter-spacing:1.5px;color:#d6dbe1;border:1px solid var(--line);background:rgba(27,33,41,.75);padding:7px 14px;border-radius:4px}

/* SECTIONS */
section{padding:92px 0}
.eyebrow{font-family:'Barlow Condensed';font-weight:600;font-size:15px;letter-spacing:4px;text-transform:uppercase;color:var(--spark);margin-bottom:12px}
.sec-title{font-size:clamp(32px,4.5vw,52px);margin-bottom:18px}
.sec-head{max-width:760px;margin-bottom:48px}
.sec-head .seam{width:90px;margin-top:22px}
.sec-head p{color:var(--mute)}

/* QUIENES SOMOS */
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.about-grid p{margin-bottom:16px;color:#cdd3da}
.about-photo{border-radius:10px;overflow:hidden;border:1px solid var(--line)}
.values{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
.values .chip{border-color:rgba(79,143,196,.5);color:var(--steel)}
@media(max-width:880px){.about-grid{grid-template-columns:1fr}}

/* SERVICIOS */
#servicios{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:30px 26px;transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--spark);transform:translateY(-4px)}
.card .ico{font-family:'Barlow Condensed';font-weight:700;font-size:15px;letter-spacing:2px;color:var(--spark);margin-bottom:14px}
.card h3{font-size:24px;margin-bottom:10px}
.card p{color:var(--mute);font-size:15.5px}
@media(max-width:880px){.cards{grid-template-columns:1fr}}

/* NORMAS */
.norms-band{margin-top:56px;border:1px solid var(--line);border-radius:10px;background:var(--carbon);padding:30px 34px}
.norms-band h3{font-size:22px;margin-bottom:16px;color:var(--spark2)}
.norms-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px 32px;font-size:15.5px;color:#cdd3da}
.norms-list li{list-style:none;padding-left:20px;position:relative}
.norms-list li::before{content:"";position:absolute;left:0;top:.55em;width:10px;height:3px;background:var(--spark)}
@media(max-width:720px){.norms-list{grid-template-columns:1fr}}

/* CAPACIDADES */
.cap-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 46px}
.cap{display:flex;gap:18px;padding:22px 0;border-bottom:1px solid var(--line)}
.cap b{font-family:'Barlow Condensed';font-size:20px;font-weight:600;letter-spacing:.5px;color:var(--spark);min-width:44px}
.cap div h3{font-size:21px;letter-spacing:.5px;margin-bottom:4px;text-transform:none;font-family:'Barlow';font-weight:600}
.cap div p{color:var(--mute);font-size:15px}
@media(max-width:820px){.cap-grid{grid-template-columns:1fr}}

/* CLIENTES */
#proyectos{background:var(--panel);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.clients{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.client-logo{border:1px solid var(--line);background:#fff;border-radius:8px;padding:18px 20px;height:88px;display:flex;align-items:center;justify-content:center;transition:border-color .2s,transform .2s}
.client-logo:hover{border-color:var(--spark);transform:translateY(-3px)}
.client-logo img{max-width:100%;max-height:100%;object-fit:contain}
.client-logo--text{background:var(--carbon)}
.client-logo--text span{font-family:'Barlow Condensed';font-size:16px;font-weight:600;letter-spacing:1px;color:#c2cad3;text-align:center}
.client-logo--text:hover span{color:var(--spark2)}
@media(max-width:900px){.clients{grid-template-columns:repeat(3,1fr)}}
@media(max-width:560px){.clients{grid-template-columns:repeat(2,1fr)}}

/* CARRUSEL OTROS PROYECTOS */
.carousel{position:relative;border-radius:10px;overflow:hidden;border:1px solid var(--line);background:var(--panel2)}
.carousel-track{display:flex;transition:transform .5s ease}
.carousel-slide{min-width:100%;aspect-ratio:16/9;background:var(--carbon)}
.carousel-slide img{width:100%;height:100%;object-fit:cover;display:block}
.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;background:rgba(20,24,29,.55);border:1px solid rgba(255,255,255,.25);color:#fff;font-size:16px;display:grid;place-items:center;cursor:pointer;transition:background .2s,border-color .2s}
.carousel-btn:hover{background:var(--spark);border-color:var(--spark);color:#181205}
.carousel-prev{left:16px}
.carousel-next{right:16px}
.carousel-dots{position:absolute;left:0;right:0;bottom:14px;display:flex;justify-content:center;gap:8px}
.carousel-dot{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.4);border:none;padding:0;cursor:pointer;transition:background .2s,transform .2s}
.carousel-dot.active{background:var(--spark);transform:scale(1.2)}
@media(max-width:600px){.carousel-btn{width:36px;height:36px;font-size:14px}.carousel-prev{left:8px}.carousel-next{right:8px}}

/* TALLER */
.plant{display:grid;grid-template-columns:.9fr 1.1fr;gap:52px;align-items:center}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:30px}
.stat{border:1px solid var(--line);border-left:4px solid var(--spark);background:var(--panel);border-radius:8px;padding:20px 22px}
.stat b{display:block;font-family:'Barlow Condensed';font-size:42px;font-weight:700;color:var(--text);line-height:1}
.stat small{color:var(--mute);font-size:13.5px;letter-spacing:1.5px;text-transform:uppercase}
.plant-photo{border-radius:10px;overflow:hidden;border:1px solid var(--line)}
@media(max-width:880px){.plant{grid-template-columns:1fr}}

/* GALERIA */
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gal figure{position:relative;border-radius:10px;overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3;background:var(--panel)}
.gal img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.gal figure:hover img{transform:scale(1.05)}
.gal figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 16px 12px;font-family:'Barlow Condensed';font-size:16px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;background:linear-gradient(180deg,transparent,rgba(14,17,21,.92))}
@media(max-width:820px){.gal{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.gal{grid-template-columns:1fr}}

/* CONTACTO */
#contacto{background:var(--panel);border-top:1px solid var(--line)}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:44px}
.contact-grid--single{grid-template-columns:1fr;max-width:380px}
.person{background:var(--panel2);border:1px solid var(--line);border-radius:10px;padding:28px 26px}
.person .role{font-family:'Barlow Condensed';font-size:14px;font-weight:600;letter-spacing:2.5px;text-transform:uppercase;color:var(--spark);margin-bottom:8px}
.person h3{font-size:23px;margin-bottom:14px;text-transform:none;letter-spacing:.3px}
.person a{display:block;color:var(--mute);font-size:15px;margin-top:6px;transition:color .2s}
.person a:hover{color:var(--spark2)}
.firm{display:grid;grid-template-columns:1fr 1fr;gap:20px;border-top:1px solid var(--line);padding-top:36px;color:var(--mute);font-size:15px}
.firm b{color:var(--text);display:block;font-family:'Barlow Condensed';font-size:17px;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:6px}
@media(max-width:880px){.contact-grid{grid-template-columns:1fr}.firm{grid-template-columns:1fr}}

/* LIGHTBOX GALERÍA */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(10,13,16,.94);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .25s ease}
.lightbox.active{opacity:1;visibility:visible}
.lightbox-img{max-width:88vw;max-height:86vh;object-fit:contain;border-radius:6px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.lightbox-close{position:absolute;top:22px;right:26px;width:42px;height:42px;border-radius:50%;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.25);color:#fff;font-size:18px;display:grid;place-items:center;cursor:pointer;transition:background .2s,border-color .2s}
.lightbox-close:hover{background:var(--spark);border-color:var(--spark);color:#181205}
.lightbox-prev{left:24px}
.lightbox-next{right:24px}
@media(max-width:600px){.lightbox-close{top:12px;right:12px;width:36px;height:36px}.lightbox-prev{left:8px}.lightbox-next{right:8px}}

/* WHATSAPP FLOTANTE */
.whatsapp-float{position:fixed;right:24px;bottom:24px;z-index:60;width:58px;height:58px;border-radius:50%;background:#25D366;display:grid;place-items:center;box-shadow:0 6px 18px rgba(0,0,0,.35);transition:transform .2s,box-shadow .2s}
.whatsapp-float svg{width:32px;height:32px;color:#fff}
.whatsapp-float:hover{transform:translateY(-3px) scale(1.05);box-shadow:0 10px 24px rgba(0,0,0,.4)}
@media(max-width:600px){.whatsapp-float{right:16px;bottom:16px;width:52px;height:52px}.whatsapp-float svg{width:28px;height:28px}}

footer{padding:26px 0;border-top:1px solid var(--line);color:#6f7986;font-size:13.5px}
.foot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
@media (prefers-reduced-motion: reduce){*{transition:none!important;scroll-behavior:auto}}