/* Acero Norte — estilo corporativo industrial. Paleta: docs/palette.md */
:root{--or:#eb5f00;--or-d:#c45200;--ink:#3f3f3f;--ink-d:#232323;--bg:#f5f5f5;--line:#e1e1e1;--w:1160px;--ease:cubic-bezier(.32,.72,0,1)}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Barlow,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.6;font-size:17px}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--w);margin:0 auto;padding:0 20px}
h1,h2,h3{font-family:'Barlow Condensed',sans-serif;text-transform:uppercase;line-height:1;letter-spacing:.005em;text-wrap:balance;color:var(--ink-d)}
p{text-wrap:pretty}
:focus-visible{outline:3px solid var(--or);outline-offset:2px}
.skip{position:absolute;left:12px;top:-60px;background:var(--or);color:#fff;padding:10px 16px;z-index:40;font-weight:600}
.skip:focus{top:12px}
/* botones: rectangulares */
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--or);color:#fff;font-weight:600;padding:15px 28px;border:2px solid var(--or);text-transform:uppercase;letter-spacing:.06em;font-size:15px;transition:background .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease)}
.btn:hover{background:var(--or-d);border-color:var(--or-d)}
.btn:active{transform:translateY(1px)}
.btn.wa-btn svg{width:20px;height:20px;fill:#fff}
.tlink{font-weight:600;font-size:14px;text-transform:uppercase;letter-spacing:.12em;border-bottom:2px solid var(--or);padding-bottom:3px;transition:color .3s}
.tlink:hover{color:var(--or)}
/* cabecera */
header{position:fixed;inset:0 0 auto 0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink-d);font-family:'Barlow Condensed';font-weight:800;font-size:28px;text-transform:uppercase;letter-spacing:.04em}
.brand img{width:42px;height:42px}
nav{display:flex;gap:30px;align-items:center}
nav a{font-weight:600;font-size:14px;text-transform:uppercase;letter-spacing:.1em;color:var(--ink);transition:color .3s}
nav a:hover,nav a.on{color:var(--or)}
nav .btn{color:#fff;padding:11px 22px;font-size:14px}
nav .btn:hover{color:#fff}
/* hero inicio: texto + foto a sangre */
.hero2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);min-height:100dvh;padding-top:76px;background:#fff}
.h2-copy{display:flex;align-items:center;padding:56px 56px 56px max(20px,calc((100vw - var(--w))/2 + 20px))}
.h2-copy .in{max-width:560px}
.eyebrow{display:inline-block;color:var(--or);font-weight:600;text-transform:uppercase;letter-spacing:.2em;font-size:13px;margin-bottom:22px;padding-left:36px;position:relative}
.eyebrow:before{content:"";position:absolute;left:0;top:50%;width:26px;height:3px;background:var(--or)}
.hero2 h1{font-size:clamp(52px,6.4vw,100px);font-weight:800;line-height:.95;margin-bottom:26px}
.hero2 h1 em{font-style:normal;color:var(--or)}
.hero2 p{font-size:19px;color:#555;max-width:500px}
.h2-cta{display:flex;align-items:center;gap:30px;margin-top:38px;flex-wrap:wrap}
.h2-photo{margin:0;position:relative;min-height:420px}
.h2-photo img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.strip{background:var(--ink)}
.strip .wrap{display:grid;grid-template-columns:repeat(3,1fr)}
.strip .wrap>div{padding:24px 20px;font-family:'Barlow Condensed';font-weight:700;font-size:24px;text-transform:uppercase;letter-spacing:.06em;color:#fff;border-left:1px solid rgba(255,255,255,.18)}
.strip .wrap>div:first-child{border-left:0;padding-left:0}
.strip .wrap>div:before{content:"";display:inline-block;width:10px;height:10px;background:var(--or);margin-right:14px}
/* heros interiores */
.page-hero{background:#fff;padding:150px 0 70px;border-bottom:1px solid var(--line)}
.ph-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.page-hero h1{font-size:clamp(48px,6.4vw,92px);font-weight:800;line-height:.95}
.page-hero h1:after{content:"";display:block;width:72px;height:6px;background:var(--or);margin-top:22px}
.page-hero p{margin-top:22px;max-width:520px;font-size:19px;color:#555}
.ph-fig{margin:0}
.ph-fig img{width:100%;aspect-ratio:4/3;object-fit:cover}
/* secciones */
section{padding:104px 0}
.head{max-width:640px;margin-bottom:52px}
.head h2{font-size:clamp(38px,5vw,60px);font-weight:800}
.head h2:after{content:"";display:block;width:64px;height:6px;background:var(--or);margin-top:18px}
.head p{margin-top:18px;color:#666}
.alt{background:var(--bg)}
.dark{background:var(--ink)}
.dark .head h2{color:#fff}.dark .head p{color:#c4c4c4}
/* tarjetas */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cards.asym{grid-template-columns:1.35fr 1fr}
.cards.asym .card:first-child{grid-row:span 2}
.cards.asym .card:first-child img{aspect-ratio:auto;height:62%;min-height:300px}
.card{background:#fff;border:1px solid var(--line);border-top:4px solid var(--line);transition:border-color .3s var(--ease)}
.card:hover{border-top-color:var(--or)}
.card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.card div{padding:26px}
.card h3{font-size:30px;font-weight:700;margin-bottom:10px}
.card h3 b{color:var(--or)}
.card p{color:#666;font-size:16px}
.more{display:inline-block;margin-top:14px;color:var(--or);font-weight:600;text-transform:uppercase;letter-spacing:.08em;font-size:14px}
/* servicios: filas */
.row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:80px}
.row:last-child{margin-bottom:0}
.row img{width:100%;aspect-ratio:4/3;object-fit:cover}
.row.rev img{order:2}
.row .num{font-family:'Barlow Condensed';font-weight:800;font-size:56px;line-height:1;color:var(--or);display:block}
.row h2{font-size:clamp(34px,4vw,52px);font-weight:800;margin:6px 0 14px}
.row h2 b{color:var(--or)}
.row p{color:#555;max-width:480px}
/* corte */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split img{width:100%;aspect-ratio:4/5;object-fit:cover}
.split ul{list-style:none;margin:26px 0 32px}
.split li{padding:12px 0 12px 34px;border-bottom:1px solid var(--line);position:relative;font-weight:500}
.split li:before{content:"";position:absolute;left:0;top:19px;width:14px;height:14px;background:var(--or)}
/* equipo */
.team{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.team img{width:100%;aspect-ratio:1;object-fit:cover}
.team .wide{grid-column:span 2}
.team .tall{grid-row:span 2;aspect-ratio:auto;height:100%}
/* cta + contacto */
.cta-band{background:var(--or);color:#fff;text-align:center;padding:72px 0}
.cta-band h2{font-size:clamp(34px,5vw,56px);font-weight:800;color:#fff;margin-bottom:24px}
.cta-band .btn{background:#fff;border-color:#fff;color:var(--ink-d)}
.cta-band .btn svg{fill:#25d366}
.cta-band .btn:hover{background:var(--ink-d);border-color:var(--ink-d);color:#fff}
.cinfo{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.cinfo div{background:var(--bg);padding:26px;border-top:4px solid var(--or)}
.cinfo dt{font-weight:600;text-transform:uppercase;letter-spacing:.12em;font-size:13px;color:var(--or)}
.cinfo dd{font-size:21px;font-weight:500;margin-top:6px}
.btn.big{font-size:18px;padding:18px 36px;background:#25d366;border-color:#25d366}
.btn.big:hover{background:#1ebe5a;border-color:#1ebe5a}
/* pie y whatsapp */
footer{background:#161616;color:#9a9a9a;padding:30px 0;font-size:14px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
footer .fl{display:flex;gap:18px;flex-wrap:wrap}
footer a:hover{color:var(--or)}
.wa{position:fixed;right:20px;bottom:20px;z-index:15;background:#25d366;color:#fff;width:58px;height:58px;border-radius:50%;display:grid;place-items:center;box-shadow:0 6px 18px rgba(0,0,0,.28);transition:transform .3s var(--ease)}
.wa:hover{transform:scale(1.06)}
.wa svg{width:30px;height:30px;fill:#fff}
/* aparición discreta al hacer scroll */
.rv{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease) var(--d,0ms),transform .7s var(--ease) var(--d,0ms)}
.rv.in{opacity:1;transform:none}
@media(max-width:900px){
 header .wrap{height:64px}.brand{font-size:24px}.brand img{width:36px;height:36px}
 nav a:not(.btn){display:none}
 .hero2{grid-template-columns:1fr;min-height:0;padding-top:64px}
 .h2-copy{padding:44px 20px}
 .h2-photo{min-height:0;aspect-ratio:4/3}
 .strip .wrap{grid-template-columns:1fr}
 .strip .wrap>div,.strip .wrap>div:first-child{border-left:0;border-top:1px solid rgba(255,255,255,.18);padding:16px 0}
 .strip .wrap>div:first-child{border-top:0}
 .ph-grid,.split,.row,.cards,.cards.asym,.cinfo{grid-template-columns:1fr}
 .row,.row.rev{gap:24px;margin-bottom:56px}.row.rev img{order:0}
 .cards.asym .card:first-child{grid-row:auto}.cards.asym .card:first-child img{height:auto;aspect-ratio:4/3}
 .split img{aspect-ratio:4/3}
 .team{grid-template-columns:1fr 1fr}
 .page-hero{padding:104px 0 48px}
 section{padding:64px 0}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}.rv{opacity:1;transform:none}}
/* encabezado compacto de páginas interiores (sin hero) */
.page-hero{padding:116px 0 36px;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:clamp(40px,5vw,64px)}
.page-hero h1:after{width:56px;height:5px;margin-top:16px}
.page-hero p{margin-top:16px;font-size:18px}
@media(max-width:900px){.page-hero{padding:92px 0 28px}}
/* logo en cabecera + decoración metálica */
.brand img{width:auto;height:44px}
@media(max-width:900px){.brand img{height:34px}}
.deco{position:relative;overflow:hidden;isolation:isolate}
.deco>*{position:relative;z-index:1}
.deco:after{content:"";position:absolute;z-index:0;width:560px;height:560px;background:url(../img/deco-metal.webp) center/contain no-repeat;opacity:.10;pointer-events:none}
.deco-r:after{right:-170px;top:50%;margin-top:-280px}
.deco-l:after{left:-190px;bottom:-200px;opacity:.08}
@media(max-width:900px){.deco:after{width:340px;height:340px;opacity:.07}.deco-r:after{right:-120px;margin-top:-170px}.deco-l:after{left:-120px;bottom:-120px}}
.deco:after{opacity:.14}
.deco-r:after{top:20px;margin-top:0;right:-150px}
.deco-l:after{opacity:.1}
@media(max-width:900px){.deco:after{opacity:.13}.deco-r:after{top:0;right:-130px}}
/* footer completo */
footer{background:#161616;color:#a3a3a3;padding:0;font-size:15px}
.fgrid{display:grid;grid-template-columns:1.4fr .7fr 1fr;gap:56px;padding-top:72px;padding-bottom:56px}
.flogo{display:flex;align-items:center;gap:14px;color:#fff;font-family:'Barlow Condensed';font-weight:800;font-size:30px;text-transform:uppercase;letter-spacing:.03em;line-height:1}
.flogo small{display:block;font-size:13px;letter-spacing:.3em;font-weight:600;color:#a3a3a3;margin-top:4px}
.fbrand p{margin:20px 0 24px;max-width:380px}
.social{display:flex;gap:10px}
.social a{width:44px;height:44px;border:1px solid #3a3a3a;display:grid;place-items:center;color:#fff;transition:background .3s var(--ease),border-color .3s var(--ease)}
.social a svg{width:20px;height:20px;fill:currentColor}
.social a:hover{background:var(--or);border-color:var(--or);color:#fff}
footer h4{font-family:'Barlow Condensed';text-transform:uppercase;letter-spacing:.1em;font-size:19px;color:#fff;margin-bottom:18px;padding-bottom:10px;border-bottom:3px solid var(--or);display:inline-block}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer address{font-style:normal;line-height:1.7}
.fl-links{display:flex;flex-direction:column;gap:6px;margin-top:16px}
footer a{transition:color .3s}
footer a:hover{color:var(--or)}
.fbar{border-top:1px solid #2a2a2a;padding:20px 0;font-size:13px;color:#7d7d7d}
.fbar .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.mapa iframe{display:block;width:100%;height:380px;border:0;filter:grayscale(.3)}
@media(max-width:900px){.fgrid{grid-template-columns:1fr;gap:36px;padding-top:48px;padding-bottom:36px}.mapa iframe{height:300px}}
.social a svg.st{fill:none;stroke:currentColor;stroke-width:1.6}
.social a svg.st *{fill:none}
.flogo img{height:56px;width:auto}
/* cabecera: derecha + menú móvil */
.hright{display:flex;align-items:center;gap:30px}
.hright>.btn{padding:11px 22px;font-size:14px}
.menu-btn{display:none;width:46px;height:46px;border:1px solid var(--line);background:#fff;cursor:pointer;position:relative}
.menu-btn span{position:absolute;left:12px;right:12px;height:2px;background:var(--ink-d);transition:transform .45s var(--ease),opacity .3s}
.menu-btn span:nth-child(1){top:15px}.menu-btn span:nth-child(2){top:22px}.menu-btn span:nth-child(3){top:29px}
.menu-btn[aria-expanded=true] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded=true] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded=true] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(max-width:900px){
 .hright{gap:10px}
 .hright>.btn{padding:10px 14px;font-size:13px}
 .menu-btn{display:block}
 nav#menu{position:fixed;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 24px 40px -24px rgba(0,0,0,.35);padding:8px 20px 16px;opacity:0;visibility:hidden;transform:translateY(-12px);transition:opacity .35s var(--ease),transform .45s var(--ease),visibility .35s}
 nav#menu.open{opacity:1;visibility:visible;transform:none}
 nav#menu a:not(.btn){display:block;padding:16px 0;font-size:17px;border-bottom:1px solid var(--line)}
 nav#menu a:last-child{border-bottom:0}
}
.mhome{display:none}@media(max-width:900px){nav#menu a.mhome{display:block}}
.menu-btn{flex:none}
/* mapa en inicio */
.loc{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:center}
.loc address{font-style:normal;font-size:20px;font-weight:500;margin:22px 0;line-height:1.6;color:var(--ink-d)}
.loc-links{display:flex;align-items:center;gap:26px;flex-wrap:wrap}
.mapa-box iframe{display:block;width:100%;height:420px;border:0;filter:grayscale(.25)}
@media(max-width:900px){.loc{grid-template-columns:1fr;gap:32px}.mapa-box iframe{height:320px}}
.strip .wrap>div{display:flex;align-items:center;justify-content:center;text-align:center}
.strip .wrap>div:first-child{padding-left:20px}
@media(max-width:900px){.strip .wrap>div,.strip .wrap>div:first-child{justify-content:flex-start;padding:16px 0}}
/* pantalla de carga */
.loader{display:none;position:fixed;inset:0;z-index:100;background:#fff;align-items:center;justify-content:center;transition:opacity .5s var(--ease),visibility .5s}
html.show-loader .loader{display:flex}
.loader.out{opacity:0;visibility:hidden}
.loader img{width:136px;height:136px}
/* hero: foto del patio centrada en grúa y contenedor */
.h2-photo img{object-position:44% 50%}
/* anillos de fondo: asomando por las esquinas, sin tapar contenido */
.deco:after{width:440px;height:440px;opacity:.13}
.deco-r:after{top:-190px;right:-130px;margin-top:0}
.deco-l:after{left:-150px;bottom:-170px;opacity:.1}
@media(max-width:900px){.deco:after{width:260px;height:260px;opacity:.12}.deco-r:after{top:-90px;right:-80px}.deco-l:after{left:-90px;bottom:-90px}}
.deco:after{width:400px;height:400px}
.deco-r:after{top:-215px;right:-110px}