/* ===== PALETA (editar acá para que coincida con el logo) ===== */
:root{
--navy:#222d44; --blue:#3c5c8a; --blue-700:#1c2638;
--ink:#1b2230; --muted:#5b6573; --line:#e4e8ee;
--bg:#ffffff; --bg-soft:#f4f6f9; --bg-navy:#1a2336;
--steel:#8b9099; /* gris del logo */
--accent:#283655; /* botones: azul oscuro del logo */
--radius:14px; --maxw:1120px;
--shadow:0 10px 30px rgba(20,30,55,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);line-height:1.6;background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
section{padding:84px 0}
h1,h2,h3{line-height:1.2;color:var(--navy);font-weight:700}
h2{font-size:clamp(1.6rem,3.4vw,2.3rem);margin-bottom:14px}
.lead{font-size:1.05rem;color:var(--muted);max-width:680px}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:.78rem;font-weight:700;color:var(--blue);margin-bottom:10px}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}
/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:.98rem;padding:13px 22px;border-radius:10px;border:1px solid transparent;cursor:pointer;transition:.18s;white-space:nowrap}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--blue-700)}
.btn-ghost{background:transparent;color:var(--navy);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.4)}
.btn-light:hover{background:rgba(255,255,255,.24)}
.btn-wa{background:#25D366;color:#fff}
.btn-wa:hover{background:#1da851}
/* Header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:1.12rem}
.brand .mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;display:grid;place-items:center;font-weight:800;font-size:.95rem}
/* Cuando tengas el logo: descomentar y reemplazar el .mark + texto por:
*/
.brand-logo{height:52px;width:auto}
.nav-links{display:flex;align-items:center;gap:24px}
.nav-links a{color:var(--muted);font-weight:500;font-size:.95rem}
.nav-links a:hover{color:var(--navy)}
.nav-cta{display:flex;align-items:center;gap:12px}
.burger{display:none;background:none;border:0;cursor:pointer;font-size:1.5rem;color:var(--navy)}
/* ===== HERO con carrusel de fondo ===== */
.hero{position:relative;min-height:86vh;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity 1.4s ease;transform:scale(1.05)}
.hero-slide.active{opacity:1}
/* Fondos del hero: obra real + render */
.hs1{background-image:url('hero-1.webp')}
.hs2{background-image:url('hero-2.webp')}
.hs3{background-image:url('hero-3.webp')}
.hero-overlay{position:absolute;inset:0;z-index:1;background:linear-gradient(100deg,rgba(18,26,42,.94) 0%,rgba(18,26,42,.8) 42%,rgba(18,26,42,.52) 100%)}
.hero-content{position:relative;z-index:2;width:100%}
.hero-content .eyebrow{color:#9fc6ec}
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem);color:#fff;margin-bottom:20px;max-width:780px}
.hero p{font-size:1.14rem;color:#dfe7f1;margin-bottom:30px;max-width:580px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-meta{margin-top:30px;display:flex;gap:8px;flex-wrap:wrap}
.chip{font-size:.82rem;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);color:#eef3f8;padding:6px 12px;border-radius:20px}
.hero-dots{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);z-index:3;display:flex;gap:8px}
.hero-dots button{width:9px;height:9px;border-radius:50%;border:0;background:rgba(255,255,255,.45);cursor:pointer;transition:.2s}
.hero-dots button.active{background:#fff;width:24px;border-radius:6px}
/* Por qué elegir */
.grid{display:grid;gap:22px}
.cards-4{grid-template-columns:repeat(4,1fr)}
.cards-3{grid-template-columns:repeat(3,1fr)}
.why .card{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.why .ico{width:42px;height:42px;border-radius:10px;background:#eaf1f9;color:var(--blue);display:grid;place-items:center;font-size:1.2rem;font-weight:800;margin-bottom:14px}
.why h3{font-size:1.02rem;margin-bottom:6px}
.why p{color:var(--muted);font-size:.93rem}
/* Metodología / Cómo trabajamos */
.steps{max-width:840px;margin:0 auto;display:grid;gap:0}
.step{display:grid;grid-template-columns:auto 1fr;gap:22px;padding:26px 0;border-top:1px solid var(--line)}
.step:first-child{border-top:0;padding-top:0}
.step .num{width:48px;height:48px;border-radius:50%;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:700;font-size:1.15rem;flex:0 0 auto}
.step h3{font-size:1.18rem;margin-bottom:6px}
.step p{color:var(--muted);font-size:.96rem}
/* Servicios con imagen */
.svc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.18s}
.svc:hover{box-shadow:var(--shadow);transform:translateY(-3px);border-color:#d3dce8}
.svc-img{height:140px;background-size:cover;background-position:center;display:grid;place-items:center;color:#fff;font-size:.78rem;letter-spacing:.05em;font-weight:600}
/* Imágenes de servicio */
.si1{background-image:url('hero-1.webp')} /* hormigón armado: armadura en obra */
.si2{background-image:url('proy-3.webp')} /* metálicas: nave Tiscornia */
.si3{background-image:url('svc-doc.webp')} /* documentación: plano de fundaciones */
.si4{background-image:url('proy-1.webp')} /* asesoría/revisión: edificio Buena Vista */
.svc-body{padding:22px}
.svc h3{font-size:1.05rem;margin-bottom:8px}
.svc p{color:var(--muted);font-size:.93rem}
.svc-link{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-weight:600;font-size:.9rem;color:var(--blue)}
.svc-link:hover{color:var(--accent)}
/* Stats band */
.stats{background:var(--bg-navy);color:#fff}
.stats .grid{grid-template-columns:repeat(3,1fr);text-align:center}
.stat b{display:block;font-size:clamp(1.9rem,4.4vw,2.9rem);color:#fff;line-height:1}
.stat span{color:#9fb3cc;font-size:.92rem;margin-top:8px;display:block}
/* Banner de palabras clave (marquee) */
.kw-band{background:var(--bg-navy);color:#fff;overflow:hidden;border-top:1px solid rgba(255,255,255,.08);border-bottom:1px solid rgba(255,255,255,.08)}
.kw-track{display:flex;width:max-content;white-space:nowrap;animation:kwscroll 36s linear infinite}
.kw-track span{display:inline-flex;align-items:center;gap:28px;padding:15px 28px 15px 0;font-size:.98rem;font-weight:600;letter-spacing:.01em;color:#e6edf6}
.kw-track span::after{content:"◆";color:var(--blue);font-size:.66rem}
.kw-band:hover .kw-track{animation-play-state:paused}
@keyframes kwscroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media(prefers-reduced-motion:reduce){.kw-track{animation:none}}
/* ===== Proyectos: carrusel grande ===== */
.pcar{position:relative;margin-top:10px}
.ptrack{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding-bottom:6px;-ms-overflow-style:none;scrollbar-width:none;cursor:grab}
.ptrack.dragging{cursor:grabbing;scroll-behavior:auto;scroll-snap-type:none;user-select:none}
.ptrack.dragging .pcap{pointer-events:none}
.ptrack::-webkit-scrollbar{display:none}
.pslide{position:relative;flex:0 0 88%;scroll-snap-align:center;border-radius:18px;overflow:hidden;min-height:72vh;background-size:cover;background-position:center;display:flex;align-items:flex-end}
/* Imágenes de proyectos reales */
.pp1{background-image:url('proy-1.webp')} /* Buena Vista */
.pp2{background-image:url('proy-2.webp')} /* Hospital San Carlos */
.pp3{background-image:url('proy-3.webp')} /* Nave Tiscornia */
.pp4{background-image:url('proy-4.webp')} /* Pórtico de Ingreso PN4 - DICON */
.pp5{background-image:url('proy-5.webp')} /* Viviendas modulares */
.pp6{background-image:url('proy-6.webp')} /* Transener / Novotec */
.pp7{background-image:url('proy-7.webp')} /* Jumbo */
.pp8{background-image:url('proy-8.webp')} /* DENAT */
.pp9{background-image:url('proy-9.webp')} /* Community Hub */
.pp10{background-image:url('proy-10.webp')} /* Q-Electric */
.pslide{background-color:#eef1f5}
.pcap{width:100%;padding:120px 40px 40px;background:linear-gradient(180deg,transparent,rgba(15,25,40,.9));color:#fff}
.pcap .tag{display:inline-block;font-size:.74rem;text-transform:uppercase;letter-spacing:.08em;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.35);padding:5px 12px;border-radius:20px;margin-bottom:12px}
.pcap h3{color:#fff;font-size:clamp(1.5rem,2.6vw,2rem);margin-bottom:6px}
.pcap p{color:#e3ebf5;font-size:1.02rem;max-width:620px}
.pnav{display:flex;gap:10px;justify-content:center;margin-top:22px}
.pnav button{width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:1.2rem;color:var(--navy);transition:.15s}
.pnav button:hover{border-color:var(--accent);color:var(--accent)}
/* About */
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:46px;align-items:center}
.about-photo{aspect-ratio:1/1;border-radius:var(--radius);background:linear-gradient(135deg,#dbe6f2,#eef3f8);display:grid;place-items:center;color:var(--blue);font-weight:600;border:1px solid var(--line);width:100%;object-fit:cover}
.about p{color:var(--muted);margin-bottom:14px}
.about ul{list-style:none;display:grid;gap:10px;margin-top:8px}
.about li{display:flex;gap:10px;color:var(--ink);font-size:.96rem}
.tick{color:#2fae74;font-weight:800;flex:0 0 auto}
/* Soft */
.soft{background:var(--bg-soft)}
.logos{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;margin-top:26px}
.logo-ph{height:54px;min-width:130px;background:#fff;border:1px dashed var(--line);border-radius:10px;display:grid;place-items:center;color:#9aa6b4;font-size:.82rem}
/* Contacto / form */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:46px;align-items:start}
.contact-info p{color:var(--muted);margin-bottom:22px}
.info-row{display:flex;gap:14px;align-items:flex-start;margin-bottom:16px}
.info-row .ico{width:40px;height:40px;border-radius:10px;background:#eaf1f9;color:var(--blue);display:grid;place-items:center;flex:0 0 auto;font-weight:700}
.info-row .ico svg{display:block}
.info-row b{display:block;color:var(--navy)}
.info-row span{color:var(--muted);font-size:.94rem}
form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.field{margin-bottom:16px}
.field label{display:block;font-size:.88rem;font-weight:600;color:var(--navy);margin-bottom:6px}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:.96rem;color:var(--ink);background:#fff;transition:.15s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(46,108,164,.12)}
.field textarea{resize:vertical;min-height:120px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hint{font-size:.82rem;color:var(--muted);margin-top:4px}
.form-ok{display:none;background:#e6f6ee;border:1px solid #b7e4cb;color:#1c7a4a;padding:14px;border-radius:10px;margin-bottom:16px;font-size:.94rem;font-weight:500}
.form-ok.show{display:block}
.form-err{display:none;background:#fdecec;border:1px solid #f3b8b8;color:#b3261e;padding:14px;border-radius:10px;margin-bottom:16px;font-size:.94rem;font-weight:500}
.form-err.show{display:block}
/* Footer */
footer{background:var(--navy);color:#cdd8e6;padding:54px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px;margin-bottom:32px}
footer h4{color:#fff;font-size:1rem;margin-bottom:14px}
footer a{color:#cdd8e6}footer a:hover{color:#fff}
footer ul{list-style:none;display:grid;gap:9px;font-size:.94rem}
.foot-logo{display:inline-block;background:#fff;padding:12px 16px;border-radius:12px}
.foot-logo img{height:44px;width:auto;display:block}
.foot-brand p{font-size:.94rem;color:#9fb3cc;margin-top:14px;max-width:300px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;font-size:.86rem;color:#9fb3cc;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
/* WhatsApp flotante */
.wa-float{position:fixed;right:20px;bottom:20px;z-index:60;background:#25D366;color:#fff;width:58px;height:58px;border-radius:50%;display:grid;place-items:center;box-shadow:0 8px 24px rgba(37,211,102,.45);font-size:1.6rem;transition:.18s}
.wa-float:hover{transform:scale(1.06)}
/* Aviso de cookies */
.cookie-bar{position:fixed;left:16px;right:16px;bottom:16px;z-index:70;max-width:560px;margin:0 auto;background:#1a2336;color:#dfe7f2;border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:16px 20px;box-shadow:0 12px 34px rgba(10,18,32,.4);display:none;align-items:center;gap:16px;flex-wrap:wrap;font-size:.9rem;line-height:1.5}
.cookie-bar.show{display:flex}
.cookie-bar a{color:#9ec1ff}
.cookie-bar p{margin:0;flex:1 1 240px}
.cookie-bar button{flex:0 0 auto;background:var(--blue);color:#fff;border:none;border-radius:9px;padding:10px 18px;font-weight:600;cursor:pointer;font-size:.9rem}
.cookie-bar button:hover{background:#4a6ea3}
/* Aparición al hacer scroll */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1);will-change:opacity,transform}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){ .reveal{opacity:1;transform:none;transition:none} }
/* FAQ (acordeón nativo con ) */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;transition:box-shadow .18s,border-color .18s}
.faq-item[open]{border-color:#cdd6e4;box-shadow:0 10px 30px rgba(20,30,50,.07)}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-weight:600;color:var(--ink);font-size:1.04rem}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .faq-ico{position:relative;flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1.5px solid var(--blue);transition:transform .2s}
.faq-item summary .faq-ico::before,.faq-item summary .faq-ico::after{content:"";position:absolute;top:50%;left:50%;width:11px;height:1.6px;background:var(--blue);border-radius:1px;transform:translate(-50%,-50%)}
.faq-item summary .faq-ico::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-item[open] summary .faq-ico{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 24px 22px;color:var(--muted);line-height:1.7;font-size:.98rem}
.faq-item .faq-a a{color:var(--blue);font-weight:600}
/* ============================================================
PÁGINAS DE SERVICIO (estructuras-metalicas.html, etc.)
============================================================ */
/* Hero interno (sin carrusel) */
.subhero{position:relative;color:#fff;overflow:hidden;padding:118px 0 70px;background:var(--bg-navy)}
.subhero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.42}
.subhero-overlay{position:absolute;inset:0;background:linear-gradient(100deg,rgba(18,26,42,.95) 0%,rgba(18,26,42,.82) 45%,rgba(18,26,42,.55) 100%)}
.subhero .wrap{position:relative;z-index:2}
.subhero h1{font-size:clamp(2rem,4.6vw,3.1rem);color:#fff;margin:6px 0 18px;max-width:840px}
.subhero p.sub-lead{font-size:1.12rem;color:#dfe7f1;max-width:680px;margin-bottom:26px}
.subhero .hero-actions{margin-bottom:24px}
.subhero .eyebrow{color:#9fc6ec}
/* Migas de pan */
.crumbs{font-size:.84rem;color:#aebfd6;margin-bottom:6px}
.crumbs a{color:#aebfd6}
.crumbs a:hover{color:#fff}
.crumbs span{color:#7e90ab}
/* Respuesta citable (bloque destacado para GEO) */
.answer-box{background:var(--bg-soft);border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:12px;padding:24px 26px;max-width:880px;margin:0 auto}
.answer-box p{color:var(--ink);font-size:1.06rem;margin:0}
.scopeband{max-width:880px;margin:20px auto 0;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 24px;display:flex;gap:16px;align-items:flex-start}
.scopeband .ico{flex:0 0 auto;width:40px;height:40px;border-radius:10px;background:var(--bg-soft);color:var(--blue);display:grid;place-items:center}
.scopeband h3{font-size:1.06rem;margin:0 0 6px;color:var(--ink)}
.scopeband p{margin:0;color:var(--muted);font-size:.98rem;line-height:1.6}
/* Filas alternadas imagen + texto */
.frow{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center;margin-bottom:54px}
.frow:last-child{margin-bottom:0}
.frow.rev .frow-txt{order:2}
.frow.rev .frow-img{order:1}
.frow-img{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);aspect-ratio:4/3;background-size:cover;background-position:center;background-color:#eef1f5}
.frow-txt h3{font-size:1.32rem;margin-bottom:10px}
.frow-txt p{color:var(--muted);margin-bottom:12px}
.frow-txt ul{list-style:none;display:grid;gap:9px}
.frow-txt li{display:flex;gap:10px;font-size:.96rem;color:var(--ink)}
/* "Qué incluye" — grilla de ítems con check */
.incl{display:grid;grid-template-columns:1fr 1fr;gap:14px 28px;max-width:880px;margin:0 auto}
.incl li{list-style:none;display:flex;gap:12px;align-items:flex-start;font-size:.98rem;color:var(--ink)}
/* Casos reales (cards) */
.cases{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.18s}
.case:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.case-img{aspect-ratio:16/10;background-size:cover;background-position:center;background-color:#eef1f5}
.case-body{padding:20px}
.case-body .tag{display:inline-block;font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--blue);font-weight:700;margin-bottom:8px}
.case-body h3{font-size:1.06rem;margin-bottom:6px}
.case-body p{color:var(--muted);font-size:.92rem}
/* Banda CTA intermedia */
.ctaband{background:var(--bg-navy);color:#fff;text-align:center}
.ctaband h2{color:#fff}
.ctaband p{color:#c4d2e6;max-width:620px;margin:0 auto 24px}
.ctaband .hero-actions{justify-content:center}
/* Otros servicios (links cruzados) */
.otros{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.otros a{border:1px solid var(--line);background:#fff;border-radius:30px;padding:10px 20px;font-size:.92rem;font-weight:600;color:var(--navy);transition:.15s}
.otros a:hover{border-color:var(--accent);color:var(--accent)}
/* Responsive */
@media(min-width:921px){ .pslide{flex:0 0 86%} }
@media(max-width:920px){
.about-grid,.contact-grid{grid-template-columns:1fr}
.cards-4,.cards-3{grid-template-columns:repeat(2,1fr)}
.foot-grid{grid-template-columns:1fr 1fr}
.about-photo{max-width:340px;justify-self:center}
.frow{grid-template-columns:1fr;gap:24px;margin-bottom:42px}
.frow.rev .frow-txt{order:1}
.frow.rev .frow-img{order:2}
.cases{grid-template-columns:repeat(2,1fr)}
}
/* Nav: pasar al menú hamburguesa ya en tablets (evita que la barra se desborde) */
@media(max-width:980px){
.nav-links{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;gap:0;border-bottom:1px solid var(--line);padding:8px 22px 18px}
.nav-links.open{display:flex}
.nav-links a{padding:12px 0;border-bottom:1px solid var(--line)}
.burger{display:block}
.nav-cta .btn-ghost{display:none}
}
@media(max-width:640px){
.brand-logo{height:44px}
section{padding:60px 0}
.cards-4,.cards-3,.foot-grid{grid-template-columns:1fr}
.stats .grid{grid-template-columns:1fr;gap:28px}
.row2{grid-template-columns:1fr}
.pslide{min-height:56vh}
.pcap{padding:90px 24px 26px}
.incl{grid-template-columns:1fr}
.cases{grid-template-columns:1fr}
.subhero{padding:92px 0 56px}
}