:root{
  --negro:#171717;
  --gris:#5f5f5f;
  --linea:#e8e1d7;
  --fondo:#ffffff;
  --arena:#f6f1ea;
  --madera:#b9834f;
  --sombra:0 24px 70px rgba(0,0,0,.13);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Arial,Helvetica,sans-serif;background:var(--fondo);color:var(--negro);line-height:1.6}
a{text-decoration:none;color:inherit}
img{width:100%;display:block}
.contenedor{width:min(1160px,92%);margin:auto}
.seccion{padding:90px 0}
.header{min-height:100vh;background:linear-gradient(135deg,#fff 0%,#fff 42%,#f7f0e7 100%);overflow:hidden;position:relative}
.header:before{content:"";position:absolute;inset:auto -20% -35% auto;width:70vw;height:70vw;background:radial-gradient(circle,rgba(185,131,79,.18),transparent 62%);pointer-events:none}
.nav{position:relative;z-index:4;width:min(1180px,94%);margin:auto;padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:18px}
.logo{display:flex;align-items:center;gap:14px}
.logo-box{width:54px;height:54px;border-radius:18px;background:#1c1c1c;color:#fff;display:grid;place-items:center;font-weight:900;letter-spacing:.06em}
.logo-text strong{display:block;font-size:1.03rem}.logo-text small{display:block;color:var(--gris);font-size:.76rem}
.menu{display:flex;gap:8px;align-items:center;background:rgba(255,255,255,.9);border:1px solid var(--linea);padding:8px;border-radius:999px;box-shadow:0 12px 30px rgba(0,0,0,.06)}
.menu a{padding:10px 16px;border-radius:999px;font-weight:700;font-size:.92rem}.menu a:hover,.menu-contacto{background:#1c1c1c;color:#fff!important}
.menu-btn{display:none;width:48px;height:48px;border:none;border-radius:14px;background:#1c1c1c;color:#fff;font-size:1.25rem}
.hero{position:relative;z-index:2;width:min(1180px,94%);margin:auto;padding:60px 0 90px;display:grid;grid-template-columns:1fr .9fr;gap:56px;align-items:center}
.etiqueta{text-transform:uppercase;letter-spacing:.18em;color:var(--madera);font-size:.78rem;font-weight:900;margin-bottom:12px}
h1,h2,h3{line-height:1.05;letter-spacing:-.04em}h1{font-size:clamp(2.6rem,6.8vw,5.8rem);max-width:820px}h2{font-size:clamp(2rem,4vw,3.55rem)}
.hero-copy{font-size:1.15rem;color:#4a4a4a;max-width:670px;margin:26px 0 34px}.botones{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 23px;border-radius:999px;font-weight:900;transition:.25s ease}.principal{background:#1c1c1c;color:#fff;box-shadow:0 18px 36px rgba(0,0,0,.18)}.principal:hover{transform:translateY(-3px);background:#000}.secundario{background:#fff;border:1px solid var(--linea);color:#1c1c1c}.secundario:hover{transform:translateY(-3px)}
.hero-imagen{position:relative}.hero-imagen img{height:min(690px,75vh);object-fit:cover;border-radius:38px;box-shadow:var(--sombra)}.tarjeta-flotante{position:absolute;left:-22px;bottom:32px;background:rgba(255,255,255,.94);border:1px solid rgba(255,255,255,.8);box-shadow:0 18px 45px rgba(0,0,0,.18);border-radius:24px;padding:18px 22px}.tarjeta-flotante span{color:var(--madera);font-weight:900}.tarjeta-flotante strong{display:block;font-size:1.15rem}
.presentacion{background:#fff}.presentacion-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:58px;align-items:start}.presentacion-grid>p{font-size:1.15rem;color:var(--gris);background:var(--arena);border-left:5px solid var(--madera);padding:30px;border-radius:0 28px 28px 0}
.servicios{background:var(--arena)}.titulo-centro{text-align:center;max-width:780px;margin:0 auto 46px}.grid-servicios{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.grid-servicios article{background:#fff;border:1px solid var(--linea);border-radius:28px;padding:28px;min-height:248px;box-shadow:0 12px 32px rgba(0,0,0,.045);position:relative;overflow:hidden;transition:.25s ease}.grid-servicios article:after{content:"";position:absolute;right:-35px;bottom:-35px;width:125px;height:125px;border-radius:50%;background:rgba(185,131,79,.12)}.grid-servicios article:hover{transform:translateY(-8px);box-shadow:var(--sombra)}.grid-servicios span{font-size:1.8rem;font-weight:900;color:#d0b292}.grid-servicios h3{font-size:1.35rem;margin:18px 0 10px}.grid-servicios p{color:var(--gris);font-size:.97rem}
.obra{padding:94px 0;background:#191919;color:#fff}.obra-grid{display:grid;grid-template-columns:.9fr 1fr;gap:58px;align-items:center}.obra-img img{height:620px;object-fit:cover;border-radius:34px;box-shadow:0 24px 70px rgba(0,0,0,.35)}.obra h2{color:#fff}.lista-obra{display:grid;gap:16px;margin-top:34px}.lista-obra div{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:22px;padding:22px}.lista-obra strong{display:block;font-size:1.2rem;margin-bottom:6px}.lista-obra span{color:#dedbd4}
.proyectos{background:#fff}.galeria{display:grid;grid-template-columns:1.15fr .85fr;grid-auto-rows:340px;gap:18px}.galeria figure{position:relative;overflow:hidden;border-radius:30px;box-shadow:var(--sombra);background:#eee}.galeria .grande{grid-row:span 2}.galeria img{height:100%;object-fit:cover}.galeria figcaption{position:absolute;left:18px;bottom:18px;background:rgba(255,255,255,.94);padding:12px 18px;border-radius:999px;font-weight:900;box-shadow:0 10px 26px rgba(0,0,0,.12)}
.contacto{background:#f7f2ec}.contacto-card{background:#fff;border:1px solid var(--linea);border-radius:34px;padding:48px;display:grid;grid-template-columns:1fr auto;gap:36px;align-items:center;box-shadow:var(--sombra)}.contacto-card p:not(.etiqueta){color:var(--gris);margin-top:16px;max-width:760px}
.footer{background:#111;color:#fff;padding:34px 0}.footer-grid{display:flex;justify-content:space-between;gap:22px;align-items:center}.footer p{color:#bbb}.footer a{font-weight:900}.whatsapp{position:fixed;z-index:20;right:22px;bottom:22px;background:#1c1c1c;color:#fff;padding:15px 21px;border-radius:999px;font-weight:900;box-shadow:0 18px 40px rgba(0,0,0,.22)}
@media(max-width:960px){.menu-btn{display:block}.menu{position:absolute;top:82px;left:0;right:0;display:none;flex-direction:column;border-radius:24px}.menu.abierto{display:flex}.menu a{width:100%;text-align:center}.hero,.presentacion-grid,.obra-grid,.contacto-card{grid-template-columns:1fr}.hero{padding-top:35px}.hero-imagen img,.obra-img img{height:auto}.grid-servicios{grid-template-columns:repeat(2,1fr)}.galeria{grid-template-columns:1fr;grid-auto-rows:auto}.galeria .grande{grid-row:auto}.galeria img{height:auto}.tarjeta-flotante{left:18px;bottom:18px}}
@media(max-width:560px){.seccion{padding:68px 0}.grid-servicios{grid-template-columns:1fr}.grid-servicios article{min-height:auto}.contacto-card{padding:30px}.logo-text small{display:none}h1{font-size:2.55rem}.footer-grid{flex-direction:column;text-align:center}.whatsapp{left:18px;right:18px;text-align:center}}