/* =========================================================
   OCFAM — Obras Civiles Farias e Hijos SpA
   Hoja de estilos propia (sin frameworks)
   ========================================================= */
:root{
  --background: hsl(220 20% 10%);
  --background-80: hsl(220 20% 10% / .8);
  --background-60: hsl(220 20% 10% / .6);
  --background-90: hsl(220 20% 10% / .9);
  --foreground: hsl(56 20% 95%);
  --card: hsl(220 18% 14%);
  --primary: hsl(38 92% 50%);
  --primary-hover: hsl(38 92% 50% / .9);
  --primary-50: hsl(38 92% 50% / .5);
  --primary-30: hsl(38 92% 50% / .3);
  --primary-foreground: hsl(56 98% 10%);
  --secondary-50: hsl(220 15% 20% / .5);
  --muted: hsl(220 15% 18%);
  --muted-foreground: hsl(220 10% 55%);
  --border: hsl(220 15% 22%);
  --gradient-end: hsl(56 85% 55%);
  --radius-sm: 4px;
  --font-sans: 'Inter', sans-serif;
  --font-display: 'Oswald', sans-serif;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;border:0 solid var(--border)}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--background);color:var(--foreground);font-family:var(--font-sans);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh}
img,video,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;cursor:pointer}
ul{list-style:none}
h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-size:inherit;font-weight:inherit}
.icon{fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}

/* ---------- Layout ---------- */
.container{width:100%;margin-inline:auto;padding-inline:1.5rem}
@media (min-width:1400px){.container{max-width:1400px}}

.section{padding-block:6rem}
.section--alt{background:var(--secondary-50)}

/* ---------- Tipografía utilitaria ---------- */
.kicker{font-family:var(--font-display);font-size:.875rem;line-height:1.25rem;letter-spacing:.3em;text-transform:uppercase;color:var(--primary);margin-bottom:.75rem}
.section-title{font-family:var(--font-display);font-size:2.25rem;line-height:2.5rem;font-weight:700;text-transform:uppercase;margin-bottom:1rem}
@media (min-width:768px){.section-title{font-size:3rem;line-height:1}}
.section-head{text-align:center;margin-bottom:4rem}
.section-divider{width:5rem;height:.25rem;background:var(--primary);margin-inline:auto}
.text-gradient{background-image:linear-gradient(to right,var(--primary),var(--gradient-end));-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- Botones ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:1rem 2rem;font-family:var(--font-display);font-size:.875rem;line-height:1.25rem;letter-spacing:.1em;text-transform:uppercase;border-radius:var(--radius-sm);transition:all .3s ease}
.btn--primary{background:var(--primary);color:var(--primary-foreground)}
.btn--primary:hover{background:var(--primary-hover)}
.btn--outline{border:1px solid hsl(56 20% 95% / .3);color:var(--foreground)}
.btn--outline:hover{border-color:var(--primary);color:var(--primary)}

/* ---------- Navbar ---------- */
.navbar{position:fixed;top:0;left:0;right:0;z-index:50;background:var(--background-90);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.navbar__inner{display:flex;align-items:center;justify-content:space-between;padding-block:1rem}
.navbar__logo img{height:2.5rem;width:auto}
.navbar__links{display:none;align-items:center;gap:2rem}
.navbar__link{font-family:var(--font-display);font-size:.875rem;line-height:1.25rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-foreground);transition:color .3s}
.navbar__link:hover{color:var(--primary)}
.navbar__toggle{display:inline-flex;color:var(--foreground)}
.navbar__toggle .icon-close{display:none}
.navbar.is-open .navbar__toggle .icon-open{display:none}
.navbar.is-open .navbar__toggle .icon-close{display:block}
.navbar__mobile{display:none;background:var(--background);border-top:1px solid var(--border)}
.navbar.is-open .navbar__mobile{display:block;animation:fade-in .5s ease-out forwards}
.navbar__mobile .container{display:flex;flex-direction:column;gap:1rem;padding-block:1rem}
@media (min-width:768px){
  .navbar__links{display:flex}
  .navbar__toggle,.navbar.is-open .navbar__mobile{display:none}
}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden}
.hero__bg{position:absolute;inset:0}
.hero__bg img{width:100%;height:100%;object-fit:cover}
.hero__bg::after{content:"";position:absolute;inset:0;background:linear-gradient(to bottom,var(--background-80),var(--background-60),var(--background))}
.hero__content{position:relative;z-index:10;text-align:center;padding-top:6rem}
.hero__kicker{margin-bottom:1rem}
.hero__title{font-family:var(--font-display);font-size:3rem;font-weight:700;text-transform:uppercase;line-height:1.25;margin-bottom:1.5rem}
@media (min-width:768px){.hero__title{font-size:4.5rem;line-height:1}}
@media (min-width:1024px){.hero__title{font-size:6rem}}
.hero__text{max-width:42rem;margin:0 auto 2.5rem;color:var(--muted-foreground);font-size:1.125rem;line-height:1.75rem}
@media (min-width:768px){.hero__text{font-size:1.25rem}}
.hero__actions{display:flex;flex-direction:column;gap:1rem;justify-content:center}
@media (min-width:640px){.hero__actions{flex-direction:row}}
.hero__scroll{position:absolute;bottom:2.5rem;left:50%;transform:translateX(-50%);animation:bounce 1s infinite}
.hero__scroll span{display:block;width:1px;height:3rem;background:linear-gradient(to bottom,var(--primary),transparent)}

/* ---------- Animaciones ---------- */
.fade-in-up{opacity:0;animation:fade-in-up .7s ease-out forwards}
.delay-1{animation-delay:.15s}.delay-2{animation-delay:.3s}.delay-3{animation-delay:.45s}
@keyframes fade-in-up{0%{opacity:0;transform:translateY(30px)}100%{opacity:1;transform:translateY(0)}}
@keyframes fade-in{0%{opacity:0}100%{opacity:1}}
@keyframes bounce{0%,100%{transform:translate(-50%,-25%);animation-timing-function:cubic-bezier(.8,0,1,1)}50%{transform:translate(-50%,0);animation-timing-function:cubic-bezier(0,0,.2,1)}}
@media (prefers-reduced-motion:reduce){.fade-in-up{opacity:1;animation:none}.hero__scroll{animation:none}}

/* ---------- Video corporativo ---------- */
.video__frame{position:relative;max-width:64rem;margin-inline:auto}
.video__frame video{width:100%;aspect-ratio:16/9;background:#000;border-radius:var(--radius-sm);border:1px solid var(--border)}
.video__caption{text-align:center;color:var(--muted-foreground);font-size:.875rem;margin-top:2.5rem}

/* ---------- Servicios ---------- */
.services-grid{display:grid;grid-template-columns:1fr;gap:1.5rem}
@media (min-width:768px){.services-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.services-grid{grid-template-columns:repeat(3,1fr)}}
.service-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:2rem;transition:all .5s}
.service-card:hover{border-color:var(--primary-50);transform:translateY(-.25rem)}
.service-card .icon{width:2.5rem;height:2.5rem;color:var(--primary);margin-bottom:1.25rem;transition:transform .3s}
.service-card:hover .icon{transform:scale(1.1)}
.service-card h3{font-size:1.25rem;line-height:1.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.025em;margin-bottom:.75rem}
.service-card p{color:var(--muted-foreground);font-size:.875rem;line-height:1.625}

/* ---------- Galería ---------- */
.gallery-grid{display:grid;grid-template-columns:1fr;gap:1.5rem}
@media (min-width:640px){.gallery-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.gallery-grid{grid-template-columns:repeat(3,1fr)}}
.gallery-item{position:relative;overflow:hidden;border-radius:var(--radius-sm);aspect-ratio:4/3;background:var(--muted);cursor:pointer}
.gallery-item[hidden]{display:none}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform .7s}
.gallery-item:hover img{transform:scale(1.1)}
.gallery-item__overlay{position:absolute;inset:0;background:rgb(0 0 0 / .4);opacity:0;transition:opacity .3s;display:flex;align-items:center;justify-content:center}
.gallery-item:hover .gallery-item__overlay,.gallery-item:focus-visible .gallery-item__overlay{opacity:1}
.gallery-item__overlay span{font-family:var(--font-display);font-size:.75rem;letter-spacing:.2em;text-transform:uppercase;color:#fff;border:1px solid rgb(255 255 255 / .4);padding:.5rem 1.5rem}
.gallery-more{margin-top:4rem;text-align:center}
.gallery-more .icon{width:18px;height:18px}
.gallery-count{margin-top:1rem;font-size:.75rem;color:var(--muted-foreground);font-family:var(--font-display);letter-spacing:.1em}

/* ---------- Lightbox ---------- */
.lightbox{position:fixed;inset:0;z-index:100;background:rgb(0 0 0 / .95);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);display:none;align-items:center;justify-content:center}
.lightbox.is-open{display:flex}
.lightbox__img{max-width:90vw;max-height:80vh;object-fit:contain}
.lightbox__btn{position:absolute;color:#fff;z-index:110;transition:color .3s}
.lightbox__btn:hover{color:var(--primary)}
.lightbox__close{top:1.5rem;right:1.5rem}
.lightbox__close .icon{width:32px;height:32px}
.lightbox__prev{left:1rem}.lightbox__next{right:1rem}
.lightbox__prev .icon,.lightbox__next .icon{width:48px;height:48px}
@media (min-width:768px){.lightbox__prev{left:2rem}.lightbox__next{right:2rem}}
.lightbox__counter{position:absolute;bottom:1.5rem;font-size:.75rem;color:#6b7280;font-family:var(--font-display);letter-spacing:.2em}

/* ---------- Nosotros ---------- */
.about-grid{display:grid;grid-template-columns:1fr;gap:4rem;align-items:center}
@media (min-width:1024px){.about-grid{grid-template-columns:repeat(2,1fr)}}
.about-media{position:relative;isolation:isolate}
.about-media img{width:100%;height:400px;object-fit:cover;border-radius:var(--radius-sm)}
.about-title{text-align:left;margin-bottom:1.5rem}
.about-text{color:var(--muted-foreground);line-height:1.625;margin-bottom:1.5rem}
.about-text:last-of-type{margin-bottom:2rem}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}
.stats__num{font-family:var(--font-display);font-size:1.875rem;line-height:2.25rem;font-weight:700;color:var(--primary)}
.stats__label{font-size:.875rem;color:var(--muted-foreground);margin-top:.25rem}

/* ---------- Contacto ---------- */
.contact-grid{max-width:48rem;margin-inline:auto;display:grid;grid-template-columns:1fr;gap:2rem}
@media (min-width:768px){.contact-grid{grid-template-columns:repeat(3,1fr)}}
.contact-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:2rem;text-align:center}
.contact-card .icon{width:2rem;height:2rem;color:var(--primary);margin:0 auto 1rem}
.contact-card h3{font-size:.875rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.5rem}
.contact-card p{color:var(--muted-foreground);font-size:.875rem}
.contact-card p+p{margin-top:.25rem}

/* ---------- Footer ---------- */
.footer{padding-block:3rem;border-top:1px solid var(--border);background:var(--card)}
.footer__grid{display:grid;grid-template-columns:1fr;gap:2.5rem;margin-bottom:2.5rem}
@media (min-width:768px){.footer__grid{grid-template-columns:repeat(3,1fr)}}
.footer__logo{height:2.5rem;width:auto;margin-bottom:1rem}
.footer p,.footer li{font-size:.875rem;color:var(--muted-foreground)}
.footer__desc{line-height:1.625}
.footer h4{font-size:.875rem;letter-spacing:.1em;text-transform:uppercase;color:var(--primary);margin-bottom:1rem}
.footer ul{display:flex;flex-direction:column;gap:.5rem}
.footer a{transition:color .3s}
.footer a:hover{color:var(--primary)}
.footer__bottom{border-top:1px solid var(--border);padding-top:1.5rem;display:flex;flex-direction:column;align-items:center;justify-content:space-between;gap:1rem}
.footer__bottom p{font-size:.75rem}
@media (min-width:768px){.footer__bottom{flex-direction:row}}