/* Ó-Estudio ARQ · hoja de estilos común
   Identidad: Montserrat (títulos) + Lato (cuerpo); azul #00537A, cobre #A46A40, texto #20262B, gris #616970 */

/* Tipografías autoalojadas (OFL): sin llamadas a Google */
@font-face{font-family:'Montserrat';src:url('../fonts/montserrat-regular.woff2') format('woff2');font-weight:300 500;font-style:normal;font-display:swap}
@font-face{font-family:'Montserrat';src:url('../fonts/montserrat-italic.woff2') format('woff2');font-weight:300 500;font-style:italic;font-display:swap}
@font-face{font-family:'Montserrat';src:url('../fonts/montserrat-bold.woff2') format('woff2');font-weight:600 800;font-style:normal;font-display:swap}
@font-face{font-family:'Montserrat';src:url('../fonts/montserrat-bolditalic.woff2') format('woff2');font-weight:600 800;font-style:italic;font-display:swap}
@font-face{font-family:'Lato';src:url('../fonts/lato-regular.woff2') format('woff2');font-weight:300 500;font-style:normal;font-display:swap}
@font-face{font-family:'Lato';src:url('../fonts/lato-italic.woff2') format('woff2');font-weight:300 500;font-style:italic;font-display:swap}
@font-face{font-family:'Lato';src:url('../fonts/lato-bold.woff2') format('woff2');font-weight:600 800;font-style:normal;font-display:swap}
@font-face{font-family:'Lato';src:url('../fonts/lato-bolditalic.woff2') format('woff2');font-weight:600 800;font-style:italic;font-display:swap}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --azul:#00537A;
  --cobre:#A46A40;
  --texto:#20262B;
  --gris:#616970;
  --linea:#e3e5e7;
  --fondo:#ffffff;
  --fondo-tenue:#f6f5f2;
  --max:1280px;
}

html{scroll-behavior:smooth}
body{font-family:'Lato',-apple-system,sans-serif;font-weight:400;color:var(--texto);background:var(--fondo);line-height:1.65;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:'Montserrat',sans-serif;font-weight:500;color:var(--texto)}
a{color:var(--azul)}
img{max-width:100%;height:auto;display:block}

.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 40px}
.container.narrow{max-width:900px}

/* ---------- NAV ---------- */
nav.top{position:fixed;top:0;left:0;right:0;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--linea);z-index:100}
nav.top .container{display:flex;justify-content:space-between;align-items:center;height:76px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo-mark{width:36px;height:36px;background:var(--azul);color:#fff;display:flex;align-items:center;justify-content:center;font-family:'Montserrat',sans-serif;font-size:20px;font-weight:700;line-height:1}
.logo-text{color:var(--texto);font-family:'Montserrat',sans-serif;font-weight:600;letter-spacing:.08em;text-transform:uppercase;font-size:13px}
.logo-text em{color:var(--cobre);font-style:normal}
.nav-links{display:flex;gap:32px;list-style:none;align-items:center}
.nav-links a{color:var(--texto);text-decoration:none;font-family:'Montserrat',sans-serif;font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;transition:color .2s}
.nav-links a:hover{color:var(--cobre)}
.nav-links a.tel{color:var(--azul);font-weight:600;letter-spacing:.06em;text-transform:none;font-size:13px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;font-size:24px;color:var(--texto)}

/* ---------- HERO ---------- */
.hero{min-height:88vh;display:flex;align-items:center;padding-top:76px}
.hero-inner{width:100%;display:grid;grid-template-columns:1fr;gap:56px}
.eyebrow{font-family:'Montserrat',sans-serif;font-size:11px;letter-spacing:.3em;text-transform:uppercase;color:var(--cobre);font-weight:600;margin-bottom:20px;display:block}
.hero h1{font-family:'Montserrat',sans-serif;font-weight:300;font-size:clamp(40px,6.4vw,84px);line-height:1.05;letter-spacing:-.02em;margin-bottom:24px;max-width:16ch}
.hero h1 em{font-style:italic;font-weight:300;color:var(--azul)}
.hero .sub{font-family:'Montserrat',sans-serif;font-weight:400;font-size:clamp(17px,1.8vw,22px);color:var(--texto);margin-bottom:20px;letter-spacing:-.005em}
.hero .lead{font-size:clamp(16px,1.4vw,19px);font-weight:300;max-width:600px;color:var(--gris);margin-bottom:40px;line-height:1.6}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.btn{display:inline-block;font-family:'Montserrat',sans-serif;font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;padding:14px 22px;text-decoration:none;border:1px solid var(--azul);color:var(--azul);transition:all .2s}
.btn:hover{background:var(--azul);color:#fff}
.btn.solid{background:var(--azul);color:#fff}
.btn.solid:hover{background:#003d5a}
.btn.cobre{border-color:var(--cobre);color:var(--cobre)}
.btn.cobre:hover{background:var(--cobre);color:#fff}

/* Franja azul tipo documento */
.strip{background:var(--azul);color:#fff;padding:28px 40px;display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin:0 -40px}
.strip .cell{font-family:'Montserrat',sans-serif;font-size:11px;letter-spacing:.18em;text-transform:uppercase;font-weight:500;opacity:.75}
.strip .cell strong{display:block;font-size:15px;letter-spacing:.04em;text-transform:none;font-weight:500;color:#fff;opacity:1;margin-top:6px;font-family:'Lato',sans-serif}

/* ---------- SECCIONES ---------- */
section{padding:112px 0}
section.alt{background:var(--fondo-tenue)}
section.dark{background:var(--texto);color:#f6f5f2}
.section-head{margin-bottom:64px;max-width:820px}
.section-title{font-family:'Montserrat',sans-serif;font-weight:300;font-size:clamp(30px,4.2vw,50px);line-height:1.1;letter-spacing:-.01em}
.section-title strong{font-weight:600;color:var(--azul)}
.section-title em{font-style:italic;font-weight:300}
.dark .section-title{color:#fff}
.dark .section-title strong{color:var(--cobre);font-weight:400;font-style:italic}
.section-intro{font-size:17px;color:var(--gris);max-width:720px;margin-top:16px;line-height:1.7}
.dark .section-intro{color:rgba(255,255,255,.75)}

/* ---------- OBRAS ---------- */
.obras-group{margin-bottom:80px}
.obras-group:last-child{margin-bottom:0}
.obras-label{display:flex;align-items:baseline;gap:16px;border-bottom:1px solid var(--texto);padding-bottom:12px;margin-bottom:36px}
.obras-label .num{font-family:'Montserrat',sans-serif;font-size:13px;letter-spacing:.18em;color:var(--cobre);font-weight:600}
.obras-label h3{font-family:'Montserrat',sans-serif;font-size:22px;font-weight:500}
.obras-label p{color:var(--gris);font-size:14px;margin-left:auto}
.obras-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:48px 32px}
.obras-grid.tres{grid-template-columns:repeat(3,1fr);gap:32px 24px}
.obra{text-decoration:none;color:inherit;display:block}
.obra-img{aspect-ratio:4/3;background:var(--fondo-tenue);overflow:hidden;margin-bottom:18px;position:relative}
.obra-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.obra:hover .obra-img img{transform:scale(1.02)}
.obra-img.plano{background:#fff;border:1px solid var(--linea)}
.obra-img.plano img{object-fit:contain;padding:12px}
.obra-tag{position:absolute;top:12px;left:12px;font-family:'Montserrat',sans-serif;font-size:10px;letter-spacing:.22em;text-transform:uppercase;background:var(--cobre);color:#fff;padding:5px 10px;font-weight:600}
.obra-meta{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:baseline}
.obra-num{font-family:'Montserrat',sans-serif;font-size:11px;letter-spacing:.2em;color:var(--cobre);font-weight:600;margin-bottom:6px}
.obra-name{font-family:'Montserrat',sans-serif;font-size:20px;font-weight:500;margin-bottom:4px}
.obras-grid.tres .obra-name{font-size:17px}
.obra-loc{color:var(--gris);font-size:14px}
.obra-year{font-family:'Montserrat',sans-serif;font-size:11px;letter-spacing:.18em;color:var(--azul);font-weight:500;white-space:nowrap}
.obra-more{display:inline-block;margin-top:8px;font-family:'Montserrat',sans-serif;font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--azul);font-weight:500}
.obra-more::after{content:' →'}

/* ---------- SERVICIOS ---------- */
.serv-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px}
.serv-col h3{font-family:'Montserrat',sans-serif;font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--cobre);font-weight:600;margin-bottom:8px}
.serv-col p.desc{color:var(--gris);font-size:15px;margin-bottom:28px}
.serv-list{list-style:none}
.serv-list li{display:grid;grid-template-columns:36px 1fr;gap:16px;padding:18px 0;border-top:1px solid var(--linea);align-items:baseline}
.serv-list li:last-child{border-bottom:1px solid var(--linea)}
.serv-list .n{font-family:'Montserrat',sans-serif;font-size:12px;letter-spacing:.14em;color:var(--cobre);font-weight:600}
.serv-list strong{font-family:'Montserrat',sans-serif;font-weight:500;font-size:16px;display:block;margin-bottom:2px}
.serv-list span{color:var(--gris);font-size:14px}
.serv-list a{color:inherit;text-decoration:none}
.serv-list a:hover strong{color:var(--azul)}

/* ---------- LEER EL EDIFICIO ---------- */
.leer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.leer-item{background:#fff;border:1px solid var(--linea)}
.leer-item .img{aspect-ratio:4/3;background:var(--fondo-tenue);overflow:hidden}
.leer-item .img img{width:100%;height:100%;object-fit:cover}
.leer-item .txt{padding:20px 22px 24px}
.leer-item strong{font-family:'Montserrat',sans-serif;font-weight:500;font-size:16px;display:block;margin-bottom:4px}
.leer-item span{color:var(--gris);font-size:14px}

/* ---------- ESTUDIO ---------- */
.estudio-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:72px;align-items:start}
.estudio-text p{font-size:17px;margin-bottom:20px;line-height:1.75}
.estudio-text blockquote{font-family:'Montserrat',sans-serif;font-weight:300;font-size:24px;font-style:italic;color:var(--cobre);line-height:1.35;border-left:2px solid var(--cobre);padding-left:20px;margin:28px 0 32px}
.cv{list-style:none;border-top:1px solid var(--texto);margin-top:8px}
.cv li{display:grid;grid-template-columns:110px 1fr;gap:20px;padding:14px 0;border-bottom:1px solid var(--linea);font-size:15px}
.cv .y{font-family:'Montserrat',sans-serif;font-size:12px;letter-spacing:.14em;color:var(--cobre);font-weight:600;padding-top:3px}
.dibujos{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:8px}
.dibujo{background:#fff;border:1px solid var(--linea);padding:10px;cursor:zoom-in;transition:transform .3s}
.dibujo:hover{transform:scale(.98)}
.dibujo img{width:100%;height:auto}
.dibujo.wide{grid-column:1/-1}
.dibujos-caption{font-family:'Montserrat',sans-serif;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--gris);margin-top:10px}
.ratitos{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:14px}
.ratitos .dibujo{padding:6px;aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;overflow:hidden}
.ratitos .dibujo img{max-height:100%;width:auto}

/* ---------- CONTACTO ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr 1fr;border:1px solid var(--linea)}
.contact-block{padding:44px;border-right:1px solid var(--linea)}
.contact-block:last-child{border-right:0}
.contact-block h3{font-family:'Montserrat',sans-serif;font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--cobre);margin-bottom:18px;font-weight:600}
.contact-block p,.contact-block a{font-size:17px;color:var(--texto);text-decoration:none;line-height:1.6;display:block}
.contact-block a{color:var(--azul);display:inline-block;border-bottom:1px solid transparent;transition:border-color .2s}
.contact-block a:hover{border-bottom-color:var(--azul)}
.contact-block a+a{margin-top:8px}
.contact-block a.big{font-family:'Montserrat',sans-serif;font-size:24px;font-weight:500}

/* ---------- PIE ---------- */
footer{background:var(--azul);color:#fff;padding:32px 0;font-family:'Montserrat',sans-serif;font-size:11px;letter-spacing:.08em}
footer .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
footer .l{opacity:.95}
footer .r{opacity:.7}
footer a{color:#fff;text-decoration:none;opacity:.7}
footer a:hover{opacity:1}

/* ---------- FICHA DE OBRA ---------- */
.ficha-head{padding:140px 0 48px}
.ficha-head h1{font-family:'Montserrat',sans-serif;font-weight:300;font-size:clamp(36px,5vw,64px);line-height:1.05;letter-spacing:-.02em;margin-bottom:20px}
.ficha-head h1 strong{font-weight:600;color:var(--azul)}
.ficha-data{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;border-top:1px solid var(--texto);border-bottom:1px solid var(--linea);padding:20px 0;margin-top:32px}
.ficha-data div{font-family:'Montserrat',sans-serif;font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--gris);font-weight:500}
.ficha-data div strong{display:block;font-family:'Lato',sans-serif;font-size:15px;letter-spacing:0;text-transform:none;color:var(--texto);font-weight:400;margin-top:4px}
.ficha-body{padding:48px 0 96px}
.ficha-text{max-width:720px;margin-bottom:56px}
.ficha-text p{font-size:17px;line-height:1.75;margin-bottom:18px}
.ficha-text p.intro{font-family:'Montserrat',sans-serif;font-weight:300;font-size:22px;line-height:1.4;color:var(--texto);margin-bottom:28px}
.ficha-hero{background:#fff;border:1px solid var(--linea);padding:20px;margin-bottom:12px;cursor:zoom-in}
.ficha-caption{font-family:'Montserrat',sans-serif;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--gris);margin-bottom:48px}
.ficha-caption span{color:var(--cobre)}
.ficha-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:56px}
.ficha-gallery .f{aspect-ratio:4/3;overflow:hidden;cursor:zoom-in;background:#0a0a0a}
.ficha-gallery .f img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.ficha-gallery .f:hover img{transform:scale(1.03)}
.ficha-gallery.dos{grid-template-columns:repeat(2,1fr)}
.ficha-planos{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:56px}
.ficha-planos .p{background:#fff;border:1px solid var(--linea);padding:14px;cursor:zoom-in}
.ficha-planos .p.wide{grid-column:1/-1}
.testimonio{background:var(--fondo-tenue);border-left:2px solid var(--cobre);padding:36px 40px;margin:16px 0 56px;max-width:820px}
.testimonio p{font-family:'Montserrat',sans-serif;font-weight:300;font-size:22px;font-style:italic;line-height:1.4;color:var(--texto);margin-bottom:16px}
.testimonio cite{font-style:normal;font-family:'Montserrat',sans-serif;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--cobre);font-weight:600}
.ficha-nav{display:flex;justify-content:space-between;gap:24px;border-top:1px solid var(--texto);padding-top:28px}
.ficha-nav a{font-family:'Montserrat',sans-serif;font-size:12px;letter-spacing:.14em;text-transform:uppercase;text-decoration:none;color:var(--azul);font-weight:500}

/* ---------- LIGHTBOX ---------- */
.lightbox{position:fixed;inset:0;background:rgba(10,15,20,.95);display:none;align-items:center;justify-content:center;z-index:200;cursor:zoom-out;padding:40px}
.lightbox.open{display:flex}
.lightbox img{max-width:100%;max-height:100%;width:auto;height:auto;background:#fff;padding:12px}
.lightbox-close{position:absolute;top:24px;right:32px;color:#fff;font-family:'Montserrat',sans-serif;font-size:14px;letter-spacing:.2em;background:none;border:0;cursor:pointer}

/* ---------- WHATSAPP FLOTANTE (móvil) ---------- */
.wa-float{display:none;position:fixed;right:16px;bottom:16px;z-index:150;background:var(--azul);color:#fff;font-family:'Montserrat',sans-serif;font-size:12px;letter-spacing:.1em;text-transform:uppercase;font-weight:600;padding:14px 18px;text-decoration:none;box-shadow:0 6px 20px rgba(0,0,0,.2)}

/* ---------- RESPONSIVE ---------- */
@media (max-width:900px){
  .container{padding:0 24px}
  section{padding:72px 0}
  .nav-links{position:fixed;top:76px;left:0;right:0;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--linea);transform:translateY(-150%);transition:transform .3s;align-items:stretch}
  .nav-links.open{transform:translateY(0)}
  .nav-links li{border-top:1px solid var(--linea)}
  .nav-links a{display:block;padding:18px 24px}
  .nav-toggle{display:block}
  .strip{grid-template-columns:1fr 1fr;gap:20px;margin:0 -24px;padding:24px}
  .obras-grid,.obras-grid.tres,.serv-grid,.leer-grid,.estudio-grid,.contact-grid,.ficha-planos{grid-template-columns:1fr}
  .contact-block{border-right:0;border-bottom:1px solid var(--linea);padding:28px 24px}
  .contact-block:last-child{border-bottom:0}
  .ficha-data{grid-template-columns:1fr 1fr}
  .ficha-gallery,.ficha-gallery.dos{grid-template-columns:1fr 1fr}
  .ratitos{grid-template-columns:repeat(4,1fr)}
  .wa-float{display:block}
  .obras-label p{display:none}
}