:root{--dark:#111417;--gold:#b9914d;--stone:#f3f1ec;--ink:#25292b}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:Arial,Helvetica,sans-serif;line-height:1.6}a{text-decoration:none;color:inherit}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.top{background:var(--dark);color:white;padding:13px max(4%,calc((100vw - 1200px)/2));display:flex;align-items:center;justify-content:space-between;gap:25px;position:sticky;top:0;z-index:5}.brand{font-weight:900;letter-spacing:3px;font-size:23px}.brand small{display:block;font-size:9px;letter-spacing:2px;font-weight:400;color:#ddd}.top nav{display:flex;flex-wrap:wrap;gap:16px;font-size:13px}.top nav a:hover,.gold{color:var(--gold)}.cta,.button{display:inline-block;background:var(--gold);color:#131313;padding:12px 18px;font-weight:700;border:0;border-radius:2px;cursor:pointer}.ghost{border:1px solid #ddd;color:white;padding:11px 17px;display:inline-block}.hero{min-height:560px;display:flex;align-items:center;color:white;background:linear-gradient(90deg,rgba(10,14,17,.95),rgba(10,14,17,.43)),url('estructuras.png') center/cover}.hero.inner{min-height:430px}.hero .content{width:min(1150px,90%);margin:auto;padding:70px 0}.eyebrow{text-transform:uppercase;color:var(--gold);font-size:12px;letter-spacing:3px;font-weight:800}h1{font-size:clamp(36px,5vw,67px);line-height:1.1;max-width:860px;margin:16px 0}h2{font-size:clamp(29px,3.3vw,42px);line-height:1.16;margin:12px 0 25px}h3{font-size:22px;line-height:1.25}p{max-width:790px}.hero p{font-size:19px;color:#e3e3e3;max-width:700px}.wrap{width:min(1150px,90%);margin:auto;padding:75px 0}.muted{color:#62676b}.light{background:var(--stone)}.dark{background:var(--dark);color:white}.dark p{color:#d7d7d7}.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:17px}.card{background:white;border:1px solid #ddd;overflow:hidden}.card img{width:100%;height:190px;object-fit:cover}.card .pad{padding:18px}.card h3{margin:5px 0}.card a{color:#8d682e;font-weight:700}.two{display:grid;grid-template-columns:1fr 1fr;gap:45px;align-items:center}.two img{width:100%;max-height:420px;object-fit:cover}.three{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.feature{padding:22px;border-left:3px solid var(--gold);background:white}.feature h3{margin:0}.breadcrumbs{font-size:13px;color:#ddd}.tags{display:flex;gap:8px;flex-wrap:wrap;margin:22px 0}.tag{border:1px solid #c9c6bf;padding:6px 11px;font-size:12px}.form{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form label{display:block;font-size:13px;font-weight:bold;margin-bottom:4px}.form input,.form select,.form textarea{width:100%;padding:13px;border:1px solid #a7a7a7;font:inherit;background:white;color:#222}.form textarea{min-height:125px}.wide{grid-column:1/-1}.note{font-size:12px;color:#777}footer{background:#0b0e10;color:#bbb;padding:38px 5%;font-size:13px}footer a{text-decoration:underline}ul{padding-left:22px}li{margin:8px 0}@media(max-width:850px){.top{position:relative;display:block}.top nav{margin-top:12px}.cards{grid-template-columns:repeat(2,1fr)}.two{grid-template-columns:1fr}.three{grid-template-columns:1fr}}@media(max-width:540px){.cards,.form{grid-template-columns:1fr}.hero{min-height:480px}.hero.inner{min-height:360px}.top nav{gap:12px}.wide{grid-column:auto}}