/* Metalúrgica Mejía — hoja de estilos */
@font-face{font-family:"Saira Condensed";font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/saira-condensed-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Saira Condensed";font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/saira-condensed-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Saira Condensed";font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/saira-condensed-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"Saira Condensed";font-style:normal;font-weight:800;font-display:swap;src:url(../fonts/saira-condensed-latin-800-normal.woff2) format("woff2")}
@font-face{font-family:"Public Sans";font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/public-sans-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Public Sans";font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/public-sans-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Public Sans";font-style:normal;font-weight:600;font-display:swap;src:url(../fonts/public-sans-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Public Sans";font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/public-sans-latin-700-normal.woff2) format("woff2")}

:root{
  --hierro:#16181B;      /* fondo oscuro principal */
  --acero:#24282D;       /* paneles oscuros */
  --acero-2:#33383F;
  --concreto:#EDEDEB;    /* fondo claro */
  --blanco:#FFFFFF;
  --texto:#1D2024;
  --gris:#5E646C;
  --gris-claro:#A9AEB5;
  --rojo:#CD1226;        /* rojo corporativo */
  --rojo-osc:#A50E1F;
  --colada:#F29A2E;      /* acento de metal fundido, solo detalles */
  --linea:#D6D7D4;
  --cut:14px;
  --display:"Saira Condensed","Arial Narrow",sans-serif;
  --body:"Public Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--concreto);color:var(--texto);font:400 1rem/1.6 var(--body);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--display);line-height:1.05;margin:0;letter-spacing:.005em}
h2{font-size:clamp(2rem,4.2vw,3.25rem);font-weight:700}
h3{font-size:1.45rem;font-weight:700}
p{margin:0 0 1em}
:focus-visible{outline:3px solid var(--colada);outline-offset:3px}
.wrap{width:min(1200px,100% - 32px);margin-inline:auto}
.skip{position:absolute;left:-999px;top:8px;background:var(--rojo);color:#fff;padding:8px 14px;z-index:100}
.skip:focus{left:8px}
.cut{clip-path:polygon(var(--cut) 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%,0 var(--cut))}

/* Botones */
.btn{--c:8px;display:inline-flex;align-items:center;justify-content:center;gap:.5em;font:600 .98rem/1 var(--body);text-decoration:none;padding:.95em 1.5em;border:0;cursor:pointer;clip-path:polygon(var(--c) 0,100% 0,100% calc(100% - var(--c)),calc(100% - var(--c)) 100%,0 100%,0 var(--c));transition:background-color .2s,color .2s}
.btn--lg{font-size:1.05rem;padding:1.1em 1.8em}
.btn--full{width:100%}
.btn--red{background:var(--rojo);color:#fff}
.btn--red:hover{background:var(--rojo-osc)}
.btn--ghost{background:rgba(255,255,255,.1);color:#fff;box-shadow:inset 0 0 0 1.5px rgba(255,255,255,.55)}
.btn--ghost:hover{background:rgba(255,255,255,.2)}
.btn--light{background:#fff;color:var(--rojo)}
.btn--light:hover{background:var(--concreto)}

/* Topbar + header */
.topbar{background:var(--hierro);color:var(--gris-claro);font-size:.85rem}
.topbar__in{display:flex;justify-content:space-between;gap:16px;padding:8px 0}
.topbar__links{display:flex;gap:20px}
.topbar a{text-decoration:none}.topbar a:hover{color:#fff}
.header{position:sticky;top:0;z-index:50;background:rgba(22,24,27,.96);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.06)}
.header__in{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff}
.brand img{width:44px;height:44px;object-fit:contain}
.brand__txt{display:flex;flex-direction:column;font-family:var(--display);line-height:1}
.brand__txt b{font-size:1.35rem;font-weight:800;color:var(--rojo);letter-spacing:.02em}
.brand__txt span{font-size:1rem;font-weight:600;color:#fff;letter-spacing:.04em}
.nav{display:flex;align-items:center;gap:28px}
.nav a{color:#E4E5E7;text-decoration:none;font-weight:500;font-size:.97rem}
.nav a:not(.btn):hover{color:#fff;text-decoration:underline;text-decoration-color:var(--rojo);text-underline-offset:6px;text-decoration-thickness:2px}
.nav__cta{color:#fff!important;padding:.8em 1.2em}
.burger{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer;padding:10px}
.burger span{display:block;height:2px;background:#fff;margin:5px 0;transition:transform .25s,opacity .25s}
.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;min-height:calc(100svh - 108px);display:flex;flex-direction:column;justify-content:flex-end;color:#fff;background:#000 url(../img/hero-poster.jpg) center/cover;overflow:hidden}
.hero__video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero__shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,15,17,.92) 0%,rgba(14,15,17,.72) 42%,rgba(14,15,17,.2) 100%),linear-gradient(0deg,rgba(14,15,17,.85),transparent 45%)}
.hero__in{position:relative;padding:96px 0 64px}
.hero__kicker{display:inline-block;font-weight:600;font-size:.95rem;color:var(--colada);border-left:3px solid var(--rojo);padding-left:12px;margin-bottom:22px}
.hero__title{font-size:clamp(2.7rem,7.4vw,6.2rem);font-weight:800;line-height:.92;max-width:13ch;text-wrap:balance}
.hero__lead{font-size:clamp(1.02rem,1.5vw,1.18rem);max-width:56ch;color:#D9DBDE;margin:26px 0 34px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px}
.spec{position:relative;background:var(--rojo)}
.spec__in{display:grid;grid-template-columns:repeat(4,1fr)}
.spec__item{padding:22px 20px 22px 0;display:flex;flex-direction:column;gap:2px}
.spec__item+.spec__item{padding-left:22px;border-left:1px solid rgba(255,255,255,.28)}
.spec__item b{font-family:var(--display);font-size:1.6rem;font-weight:700;line-height:1.05}
.spec__item span{font-size:.88rem;color:#FBE3E6}

/* Secciones */
.section{padding:clamp(64px,9vw,120px) 0}
.head{display:grid;grid-template-columns:1fr 1fr;gap:24px 64px;align-items:end;margin-bottom:48px}
.head p{color:var(--gris);max-width:52ch;margin:0}
.head--light p{color:var(--gris-claro)}

/* Sectores */
.sectors{background:var(--concreto)}
.sectors__grid{display:grid;grid-template-columns:repeat(5,1fr);border-top:3px solid var(--texto)}
.sector{padding:24px 22px 8px 0}
.sector+.sector{padding-left:22px;border-left:1px solid var(--linea)}
.sector h3{font-size:1.5rem;margin-bottom:10px}
.sector p{color:var(--gris);font-size:.95rem}

/* Nosotros */
.about{background:#fff}
.about__grid{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(32px,5vw,72px);align-items:start}
.about__photo{margin:0;position:sticky;top:100px}
.about__photo img{width:100%;aspect-ratio:4/3.4;object-fit:cover;object-position:center 35%}
.about__txt h2{margin-bottom:24px;max-width:18ch}
.about__txt>p{color:#3D4249}
.why{list-style:none;padding:0;margin:28px 0 32px;display:grid;gap:14px}
.why li{padding-left:22px;position:relative;color:#3D4249}
.why li::before{content:"";position:absolute;left:0;top:.55em;width:10px;height:10px;background:var(--rojo);clip-path:polygon(3px 0,100% 0,100% 7px,7px 100%,0 100%,0 3px)}
.why b{color:var(--texto)}
.mv{display:flex;gap:0;border-bottom:2px solid var(--linea)}
.mv button{background:none;border:0;font:700 1.25rem var(--display);padding:10px 18px 10px 0;margin-right:18px;color:var(--gris);cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-2px}
.mv button[aria-selected="true"]{color:var(--texto);border-color:var(--rojo)}
.mv__panel{padding-top:18px;color:#3D4249}

/* Productos */
.products{background:var(--hierro);color:#fff}
.products__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.product{background:var(--acero);display:flex;flex-direction:column;clip-path:polygon(0 0,100% 0,100% calc(100% - var(--cut)),calc(100% - var(--cut)) 100%,0 100%)}
.product img{width:100%;aspect-ratio:4/3;object-fit:cover}
.product__body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.product h3{margin-bottom:8px}
.product p{color:var(--gris-claro);font-size:.95rem}
.product dl{margin:auto 0 16px;padding-top:12px;border-top:1px solid var(--acero-2);display:flex;gap:10px;font-size:.88rem}
.product dt{color:var(--gris-claro)}
.product dd{margin:0;color:#fff;font-weight:600}
.link-quote{color:#fff;font-weight:600;text-decoration:underline;text-decoration-color:var(--rojo);text-decoration-thickness:2px;text-underline-offset:5px}
.link-quote:hover{color:var(--colada)}
.product--wide{grid-column:span 2;flex-direction:row}
.product--wide img{width:52%;aspect-ratio:auto;height:100%;min-height:340px}
.product--wide h3{font-size:1.9rem}
.also{margin:32px 0 0;color:var(--gris-claro);max-width:80ch}
.also b{color:#fff}

/* Proceso */
.process{background:var(--concreto)}
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:44px 28px;counter-reset:s}
.step{counter-increment:s;position:relative}
.step img{width:100%;aspect-ratio:16/10;object-fit:cover;margin-bottom:18px;clip-path:polygon(var(--cut) 0,100% 0,100% 100%,0 100%,0 var(--cut))}
.step h3{display:flex;align-items:baseline;gap:12px;margin-bottom:8px}
.step h3::before{content:counter(s);font:800 1rem/1 var(--display);color:#fff;background:var(--rojo);min-width:28px;height:28px;display:inline-grid;place-items:center;transform:translateY(-3px)}
.step p{color:var(--gris);font-size:.96rem}
.services{margin-top:64px;background:#fff;padding:32px;display:grid;grid-template-columns:280px 1fr;gap:24px;align-items:center;border-left:4px solid var(--rojo)}
.services h3{font-size:1.6rem}
.services ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:12px 28px}
.services .link-quote{color:var(--texto)}
.services .link-quote:hover{color:var(--rojo)}

/* Galería */
.gallery{background:#fff}
.gallery__grid{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:220px;gap:12px;grid-auto-flow:dense}
.g{display:block;overflow:hidden;background:var(--acero)}
.g img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.g:hover img{transform:scale(1.04)}
.g--tall{grid-row:span 2}
.g--wide{grid-column:span 2}

/* Testimonios */
.testimonials{background:var(--concreto)}
.testimonials__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.quote{background:#fff;padding:28px;border-top:3px solid var(--rojo)}
.quote blockquote{margin:0 0 18px;font-size:1.05rem}
.quote b{display:block}.quote span{color:var(--gris);font-size:.9rem}

/* CTA */
.cta-band{background:var(--rojo) url(../img/colada.jpg) center/cover;position:relative;color:#fff}
.cta-band::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(165,14,31,.96) 0%,rgba(165,14,31,.88) 55%,rgba(165,14,31,.55))}
.cta-band__in{position:relative;padding:72px 0;display:grid;grid-template-columns:1.2fr 1fr auto;gap:24px 40px;align-items:center}
.cta-band h2{font-size:clamp(1.9rem,3.6vw,2.8rem)}
.cta-band p{margin:0;color:#FBE3E6}

/* Contacto */
.contact{background:var(--hierro);color:#fff;padding-bottom:0}
.contact__grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(32px,5vw,64px);align-items:start;padding-bottom:clamp(64px,8vw,100px)}
.contact__info h2{margin-bottom:16px}
.contact__info>p{color:var(--gris-claro)}
.people{list-style:none;padding:0;margin:28px 0;display:grid;gap:16px}
.people li{background:var(--acero);padding:18px 20px;display:grid;gap:2px}
.people__role{font-size:.85rem;color:var(--colada);font-weight:600}
.people b{font:700 1.35rem var(--display)}
.people a{text-decoration:none;color:#E4E5E7}
.people a:hover{color:#fff;text-decoration:underline}
.wa-link{color:#7EE2A0!important;font-weight:600;font-size:.92rem}
.contact__line{color:#E4E5E7;margin:0 0 8px}
.contact__line a{color:#fff}
.social{display:flex;gap:10px;margin-top:22px}
.social a{width:44px;height:44px;display:grid;place-items:center;background:var(--acero);transition:background-color .2s}
.social a:hover{background:var(--rojo)}
.social svg{width:20px;height:20px;fill:#fff}

.formbox{background:#fff;color:var(--texto);padding:8px 32px 32px}
.formtabs{display:flex;border-bottom:2px solid var(--linea);margin-bottom:24px}
.formtabs button{flex:1;background:none;border:0;font:700 1.2rem var(--display);padding:18px 8px 14px;color:var(--gris);cursor:pointer;border-bottom:3px solid transparent;margin-bottom:-2px}
.formtabs button[aria-selected="true"]{color:var(--texto);border-color:var(--rojo)}
.form{display:grid;gap:16px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form label{display:grid;gap:6px;font-size:.88rem;font-weight:600;color:#3D4249}
.form input,.form select,.form textarea{font:400 1rem var(--body);color:var(--texto);background:#F6F6F5;border:1.5px solid var(--linea);padding:.75em .85em;width:100%;border-radius:0;transition:border-color .15s}
.form textarea{resize:vertical}
.form input:focus,.form select:focus,.form textarea:focus{outline:0;border-color:var(--rojo);background:#fff}
.form .invalid{border-color:var(--rojo);background:#FDF1F2}
.form__hint{font-size:.88rem;color:var(--gris);margin:-4px 0 0}
.form__status{margin:0;font-size:.95rem;min-height:1.4em}
.form__status.ok{color:#17803D;font-weight:600}
.form__status.err{color:var(--rojo);font-weight:600}
.form__status a{color:inherit}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.choice{border:0;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.choice legend{font-size:.88rem;font-weight:600;color:#3D4249;margin-bottom:6px}
.choice label{display:block;font-weight:500}
.choice input{position:absolute;opacity:0;width:1px;height:1px}
.choice span{display:flex;align-items:center;justify-content:center;text-align:center;min-height:52px;padding:8px;border:1.5px solid var(--linea);background:#F6F6F5;cursor:pointer;font-size:.92rem;line-height:1.25}
.choice input:checked+span{border-color:var(--rojo);background:#FDF1F2;color:var(--rojo-osc);font-weight:600}
.choice input:focus-visible+span{outline:3px solid var(--colada);outline-offset:2px}
.map iframe{display:block;width:100%;height:380px;border:0;filter:grayscale(.85) contrast(1.05)}

/* Footer */
.footer{background:#0F1012;color:var(--gris-claro);font-size:.92rem}
.footer__in{display:grid;grid-template-columns:auto 1fr auto;gap:32px;align-items:center;padding:40px 0}
.footer__logo{width:120px}
.footer p{margin:0 0 10px;max-width:60ch}
.footer__nav{display:flex;flex-wrap:wrap;gap:18px}
.footer__nav a{text-decoration:none}.footer__nav a:hover{color:#fff}
.footer__copy{align-self:end}

/* Chat */
.chat{position:fixed;right:18px;bottom:18px;z-index:60;display:flex;flex-direction:column;align-items:flex-end;gap:12px}
.chat__btn{display:flex;align-items:center;gap:8px;background:#25D366;color:#073B1C;border:0;height:56px;padding:0 20px 0 16px;border-radius:28px;font:700 1rem var(--body);cursor:pointer;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.chat__btn svg{width:26px;height:26px;fill:#073B1C}
.chat__panel{width:300px;max-width:calc(100vw - 36px);background:#fff;box-shadow:0 16px 40px rgba(0,0,0,.3);overflow:hidden}
.chat__head{background:#075E54;color:#fff;padding:16px 18px}
.chat__head b{display:block;font:700 1.25rem var(--display)}
.chat__head span{font-size:.85rem;opacity:.85}
.chat__opt{display:block;padding:14px 18px;text-decoration:none;border-bottom:1px solid #EEE}
.chat__opt:hover{background:#F2FBF5}
.chat__opt b{display:block;color:var(--texto)}
.chat__opt span{font-size:.86rem;color:var(--gris)}

/* Lightbox */
.lightbox{position:fixed;inset:0;z-index:90;background:rgba(10,11,12,.94);display:grid;place-items:center;padding:24px}
.lightbox[hidden]{display:none}
.lightbox img{max-height:88vh;max-width:min(1200px,100%);object-fit:contain}
.lightbox__close{position:absolute;top:14px;right:18px;background:none;border:0;color:#fff;font-size:2.6rem;line-height:1;cursor:pointer;width:48px;height:48px}

/* Responsive */
@media (max-width:1080px){
  .sectors__grid{grid-template-columns:repeat(3,1fr)}
  .sector:nth-child(4){padding-left:0;border-left:0}
  .products__grid{grid-template-columns:repeat(2,1fr)}
  .services{grid-template-columns:1fr}
  .services ul{grid-template-columns:repeat(2,1fr)}
  .cta-band__in{grid-template-columns:1fr;justify-items:start}
}
@media (max-width:900px){
  .burger{display:block}
  .nav{position:fixed;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--hierro);padding:8px 16px 20px;transform:translateY(-110%);visibility:hidden;transition:transform .3s,visibility .3s;border-bottom:3px solid var(--rojo)}
  .nav.open{transform:none;visibility:visible}
  .nav a{padding:14px 4px;border-bottom:1px solid rgba(255,255,255,.08);font-size:1.05rem}
  .nav__cta{margin-top:14px;border:0!important}
  .header{top:0}
  .head{grid-template-columns:1fr}
  .spec__in{grid-template-columns:repeat(2,1fr)}
  .spec__item:nth-child(3){padding-left:0;border-left:0}
  .spec__item:nth-child(n+3){border-top:1px solid rgba(255,255,255,.28)}
  .about__grid,.contact__grid{grid-template-columns:1fr}
  .about__photo{position:static}
  .about__photo img{aspect-ratio:3/2}
  .steps{grid-template-columns:repeat(2,1fr)}
  .gallery__grid{grid-template-columns:repeat(2,1fr);grid-auto-rows:180px}
  .footer__in{grid-template-columns:1fr}
}
@media (max-width:640px){
  .topbar__in>span{display:none}
  .topbar__in{justify-content:center}
  .topbar__links{gap:14px;font-size:.8rem;flex-wrap:wrap;justify-content:center}
  .hero{min-height:calc(100svh - 100px)}
  .hero__in{padding:64px 0 40px}
  .hero__actions .btn{flex:1 1 100%}
  .spec__item{padding:16px 12px 16px 0}
  .spec__item+.spec__item{padding-left:12px}
  .spec__item:nth-child(3){padding-left:0}
  .spec__item b{font-size:1.25rem}
  .sectors__grid{grid-template-columns:1fr}
  .sector,.sector+.sector{padding:20px 0 4px;border-left:0;border-bottom:1px solid var(--linea)}
  .products__grid{grid-template-columns:1fr}
  .product--wide{grid-column:auto;flex-direction:column}
  .product--wide img{width:100%;min-height:0;aspect-ratio:4/3}
  .product--wide h3{font-size:1.45rem}
  .steps{grid-template-columns:1fr}
  .services{padding:24px}
  .services ul{grid-template-columns:1fr}
  .row,.choice{grid-template-columns:1fr}
  .choice span{min-height:44px}
  .formbox{padding:4px 18px 24px}
  .formtabs button{font-size:1.05rem}
  .gallery__grid{grid-auto-rows:140px;gap:8px}
  .chat__btn span{display:none}
  .chat__btn{padding:0;width:56px;justify-content:center}
  .map iframe{height:300px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important}
  .hero__video{display:none}
}

/* Preguntas frecuentes */
.faq{background:var(--concreto)}
.faq__grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(24px,5vw,72px);align-items:start}
.faq__head{position:sticky;top:100px}
.faq__head p{color:var(--gris);margin-top:16px;max-width:40ch}
.faq__list{border-top:3px solid var(--texto)}
.faq__item{border-bottom:1px solid var(--linea)}
.faq__item summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 0}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary h3{font-size:1.3rem;font-weight:700}
.faq__item summary::after{content:"+";font:700 1.6rem/1 var(--display);color:var(--rojo);flex:none;transition:transform .2s}
.faq__item[open] summary::after{transform:rotate(45deg)}
.faq__item p{color:#3D4249;margin:0 0 22px;max-width:68ch}
@media (max-width:900px){.faq__grid{grid-template-columns:1fr}.faq__head{position:static}}