/* Roselli Construcciones — hoja de estilos unica (sin frameworks, sin webfonts) */
:root{
  --rojo:#c8102e;
  --rojo-osc:#9c0c24;
  --grafito:#15181c;
  --grafito-2:#22262c;
  --texto:#3d434b;
  --texto-claro:#6b7280;
  --linea:#e3e6ea;
  --gris:#f4f5f7;
  --blanco:#fff;
  --radio:10px;
  --sombra:0 10px 30px rgba(15,20,28,.09);
  --wrap:1180px;
  --fuente:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--fuente);font-size:17px;line-height:1.6;
  color:var(--texto);background:var(--blanco);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--rojo);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:var(--fuente);color:var(--grafito);line-height:1.15;margin:0 0 .6em;letter-spacing:-.02em;text-wrap:balance}
h1{font-size:clamp(1.72rem,3.7vw,2.6rem);font-weight:800;letter-spacing:-.03em}
h2{font-size:clamp(1.5rem,3vw,2.15rem);font-weight:800}
h3{font-size:1.14rem;font-weight:700}
p{margin:0 0 1em}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:var(--rojo);color:#fff;padding:10px 16px;border-radius:6px;z-index:100}

/* ---------- botones ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-weight:700;font-size:.95rem;padding:12px 20px;border-radius:var(--radio);
  border:1px solid transparent;cursor:pointer;text-align:center;transition:background .18s,color .18s,border-color .18s,transform .18s;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn--rojo{background:var(--rojo);color:#fff}
.btn--rojo:hover{background:var(--rojo-osc)}
.btn--blanco{background:#fff;color:var(--grafito);border-color:#fff}
.btn--blanco:hover{background:#e9ebee;color:var(--grafito);border-color:#e9ebee}
.btn--wa{background:#25d366;color:#0b2b16;border-color:#25d366}
.btn--wa:hover{background:#1fbb59;color:#08210f;border-color:#1fbb59}
.btn--grande{padding:14px 26px;font-size:1rem}

/* WhatsApp flotante */
.wa-flotante{
  position:fixed;right:18px;bottom:18px;z-index:60;width:56px;height:56px;border-radius:50%;
  background:#25d366;color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 24px rgba(11,43,22,.28);transition:transform .18s,background .18s;
}
.wa-flotante svg{width:30px;height:30px}
.wa-flotante:hover{background:#1fbb59;transform:scale(1.06);text-decoration:none}
.pie__wa{display:inline-flex;align-items:center;gap:8px}
.pie__wa svg{width:16px;height:16px}
.hero__ver{
  align-self:center;color:#fff;font-weight:700;font-size:.98rem;text-decoration:none;
  border-bottom:2px solid rgba(255,255,255,.5);padding-bottom:2px;
}
.hero__ver:hover{color:#fff;text-decoration:none;border-bottom-color:#fff}
.hero__ver span{display:inline-block;transition:transform .18s}
.hero__ver:hover span{transform:translateX(4px)}

/* ---------- cabecera ---------- */
.cabecera{
  position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--linea);
  transition:box-shadow .2s;
}
.cabecera.is-fija{box-shadow:0 6px 22px rgba(15,20,28,.09)}
.cabecera__in{display:flex;align-items:center;gap:20px;min-height:76px}
.logo img{width:auto;height:52px}
.menu{margin-left:auto;display:flex;align-items:center;gap:26px}
.menu a{color:var(--grafito);font-weight:600;font-size:.98rem;padding:6px 0;border-bottom:2px solid transparent}
.menu a:hover{color:var(--rojo);text-decoration:none;border-bottom-color:var(--rojo)}
.menu__cta{color:#fff!important;border-bottom:0!important}
.menu__cta:hover{color:#fff!important}
.hamb{display:none;margin-left:auto;width:46px;height:46px;border:1px solid var(--linea);background:#fff;border-radius:8px;cursor:pointer;padding:12px 11px;flex-direction:column;justify-content:space-between}
.hamb span{display:block;height:2px;background:var(--grafito);border-radius:2px;transition:transform .2s,opacity .2s}
.hamb[aria-expanded="true"] span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.hamb[aria-expanded="true"] span:nth-child(2){opacity:0}
.hamb[aria-expanded="true"] span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;isolation:isolate;color:#fff;background:var(--grafito)}
.hero__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.hero__velo{position:absolute;inset:0;z-index:-1;
  background:linear-gradient(105deg,rgba(10,13,17,.95) 0%,rgba(10,13,17,.86) 45%,rgba(10,13,17,.6) 100%)}
.hero__in{padding:84px 22px 0;max-width:var(--wrap)}
.hero__desde{
  display:inline-block;margin:0 0 18px;font-size:.8rem;font-weight:800;letter-spacing:.16em;text-transform:uppercase;
  color:#fff;background:var(--rojo);padding:6px 13px;border-radius:100px;
}
.hero h1{color:#fff;max-width:26ch;font-size:clamp(1.72rem,3.6vw,2.55rem);line-height:1.18}
.hero__sub{max-width:62ch;font-size:1.06rem;color:#fff;margin-bottom:28px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:56px}
.hero__datos{
  list-style:none;margin:0;padding:22px 0 0;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;
  border-top:1px solid rgba(255,255,255,.22);margin-left:-22px;margin-right:-22px;padding-left:22px;padding-right:22px;
  background:linear-gradient(180deg,rgba(255,255,255,.09),rgba(255,255,255,.02));
}
.hero__datos li{display:flex;flex-direction:column;padding-bottom:22px}
.hero__datos strong{font-size:1.22rem;color:#fff;font-weight:800}
.hero__datos span{font-size:.84rem;color:rgba(255,255,255,.88);text-transform:uppercase;letter-spacing:.06em}

/* ---------- secciones ---------- */
.seccion{padding:76px 0;scroll-margin-top:88px}
[id]{scroll-margin-top:88px}
.seccion--gris{background:var(--gris)}
.kicker{font-size:.78rem;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:var(--rojo);margin:0 0 10px}
.lede{font-size:1.06rem;color:var(--texto-claro);max-width:70ch;margin-bottom:34px}
.grid-2{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:start}

/* ---------- servicios ---------- */
.grid-serv{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:6px}
.serv{background:#fff;border:1px solid var(--linea);border-radius:var(--radio);padding:26px 22px;display:flex;flex-direction:column;transition:box-shadow .2s,transform .2s,border-color .2s}
.serv:hover{box-shadow:var(--sombra);transform:translateY(-3px);border-color:#d3d8de}
.serv__ico{color:var(--rojo);margin-bottom:14px}
.serv h3{margin-bottom:8px}
.serv p{font-size:.95rem;color:var(--texto-claro);margin-bottom:14px}
.serv__lista{list-style:none;margin:0 0 18px;padding:0;font-size:.92rem}
.serv__lista li{position:relative;padding-left:18px;margin-bottom:7px}
.serv__lista li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;background:var(--rojo);border-radius:2px}
.serv__mas{margin-top:auto;font-weight:700;font-size:.92rem}
.serv__mas span{transition:transform .18s;display:inline-block}
.serv__mas:hover span{transform:translateX(4px)}

/* ---------- filtros + obras ---------- */
.filtros{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:26px}
.filtro{background:#fff;border:1px solid var(--linea);color:var(--grafito);font:inherit;font-size:.9rem;font-weight:600;padding:8px 15px;border-radius:100px;cursor:pointer;transition:background .15s,color .15s,border-color .15s}
.filtro:hover{border-color:#c8ced5}
.filtro.is-on{background:var(--grafito);border-color:var(--grafito);color:#fff}
.grid-obras{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.obra{margin:0;background:#fff;border-radius:var(--radio);overflow:hidden;border:1px solid var(--linea)}
.obra.is-oculta{display:none}
/* fotos panoramicas: ocupan dos columnas */
.obra--ancha{grid-column:span 2}
.obra--ancha .obra__btn{aspect-ratio:8/3}
.obra--ancha figcaption{min-height:0}
.obra__btn{display:block;width:100%;padding:0;border:0;background:#000;cursor:zoom-in;position:relative;aspect-ratio:4/3;overflow:hidden}
.obra__btn img{width:100%;height:100%;object-fit:cover;transition:transform .35s,opacity .25s}
.obra__btn:hover img{transform:scale(1.05);opacity:.9}
.obra figcaption{font-size:.83rem;color:var(--texto-claro);padding:11px 13px;min-height:54px;border-top:1px solid var(--linea)}

/* ---------- empresa ---------- */
.valores{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:16px}
.valores li{border-left:3px solid var(--rojo);padding-left:16px;font-size:.96rem;color:var(--texto-claro)}
.valores strong{display:block;color:var(--grafito);font-size:1rem}
.empresa__fotos{display:grid;gap:14px}
.empresa__fotos img{border-radius:var(--radio);width:100%;object-fit:cover}

/* ---------- clientes ---------- */
.grid-clientes{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.grid-clientes li{background:#fff;border:1px solid var(--linea);border-radius:var(--radio);display:flex;align-items:center;justify-content:center;padding:16px 18px;min-height:104px}
.grid-clientes img{width:100%;max-width:180px;height:auto;filter:grayscale(1);opacity:.78;transition:filter .25s,opacity .25s}
.grid-clientes li:hover img{filter:none;opacity:1}

/* ---------- contacto ---------- */
.grid-2--contacto{gap:56px}
.datos{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:18px}
.datos li{display:flex;gap:14px;align-items:flex-start;font-size:.98rem}
.datos__ico{color:var(--rojo);flex:0 0 auto;margin-top:2px}
.datos strong{display:block;color:var(--grafito);font-size:.95rem}
.form{background:var(--gris);border:1px solid var(--linea);border-radius:14px;padding:28px}
.form__fila{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form label{display:block;font-size:.9rem;font-weight:700;color:var(--grafito);margin-bottom:16px}
.form input,.form select,.form textarea{
  width:100%;margin-top:7px;font:inherit;font-size:.97rem;font-weight:400;color:var(--texto);
  background:#fff;border:1px solid #d5dae0;border-radius:8px;padding:11px 13px;
}
.form input:focus,.form select:focus,.form textarea:focus{outline:2px solid var(--rojo);outline-offset:1px;border-color:var(--rojo)}
.form textarea{resize:vertical}
.form .hp{position:absolute!important;left:-9999px!important;width:1px;height:1px}
.form__legal{font-size:.8rem;color:var(--texto-claro);margin:0 0 16px}
.form input:invalid:not(:placeholder-shown){border-color:var(--rojo)}
.form .is-error{border-color:var(--rojo)!important;background:rgba(200,16,46,.05)}
.form__error{font-size:.86rem;color:var(--rojo);font-weight:600;margin:0 0 14px}

/* ---------- pie ---------- */
.pie{background:var(--grafito);color:rgba(255,255,255,.72);padding:56px 0 26px;font-size:.94rem}
.pie__in{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px}
.pie h3{color:#fff;font-size:.85rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:14px}
.pie ul{list-style:none;margin:0;padding:0}
.pie li{margin-bottom:9px}
.pie a{color:rgba(255,255,255,.82)}
.pie a:hover{color:#fff}
.pie__marca img{width:auto;height:48px;background:#fff;border-radius:8px;padding:6px 10px;margin-bottom:16px}
.pie__marca p{margin:0;max-width:38ch}
.pie__fin{border-top:1px solid rgba(255,255,255,.14);margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.85rem;color:rgba(255,255,255,.55)}
.pie__fin p{margin:0}

/* ---------- lightbox ---------- */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(9,11,14,.92);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:26px}
.lightbox[hidden]{display:none}
.lightbox img{max-width:min(1100px,94vw);max-height:78vh;width:auto;border-radius:8px}
.lightbox p{color:#fff;margin:0;font-size:.95rem;text-align:center;max-width:70ch}
.lightbox__cerrar{position:absolute;top:14px;right:20px;background:transparent;border:0;color:#fff;font-size:2.4rem;line-height:1;cursor:pointer}

/* ---------- 404 / gracias ---------- */
.pagina-simple{max-width:640px;margin:0 auto;padding:90px 22px;text-align:center}
.pagina-simple h1{margin-bottom:18px}

/* ---------- responsive ---------- */
@media (max-width:1120px){
  .menu__wa{display:none}
}
@media (max-width:1020px){
  .grid-serv{grid-template-columns:repeat(2,1fr)}
  .grid-obras{grid-template-columns:repeat(3,1fr)}
  .grid-clientes{grid-template-columns:repeat(3,1fr)}
  .grid-2,.pie__in{grid-template-columns:1fr;gap:36px}
  .hero__datos{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:780px){
  body{font-size:16px}
  .seccion{padding:56px 0}
  .hamb{display:flex}
  .menu{
    position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--linea);
    flex-direction:column;align-items:stretch;gap:0;padding:8px 22px 20px;display:none;box-shadow:var(--sombra);
  }
  .menu.is-abierto{display:flex}
  .menu a{padding:13px 0;border-bottom:1px solid var(--linea)}
  .menu a:last-child{border-bottom:0}
  .menu__cta{margin-top:14px;border-bottom:0!important}
  .menu__wa{display:inline-flex;margin-top:14px;border-bottom:0!important}
  .wa-flotante{width:52px;height:52px;right:14px;bottom:14px}
  .hero__ver{align-self:flex-start}
  .grid-obras{grid-template-columns:repeat(2,1fr)}
  .grid-clientes{grid-template-columns:repeat(2,1fr);gap:10px}
  .grid-clientes li{min-height:88px;padding:12px}
  .hero__in{padding-top:56px}
  .hero h1{max-width:100%}
  .hero__cta{margin-bottom:38px}
  .hero__datos{gap:14px}
  .form{padding:20px}
  .form__fila{grid-template-columns:1fr}
  .obra figcaption{min-height:auto;font-size:.8rem}
}
@media (max-width:460px){
  .grid-obras{grid-template-columns:1fr}
  .hero__cta .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important;animation:none!important}
}