/* ============================================================
   Constructora VEPA Ltda. — hoja de estilos
   Rutas relativas a este archivo: css/styles.css -> ../img/
   ============================================================ */

:root{
  --navy:#2B3861;
  --navy-soft:#3A466C;
  --sky:#29ABE2;
  --sky-deep:#1C8CBD;
  --paper:#FFFFFF;
  --paper-dim:#F4F7FA;
  --paper-cool:#EAF0F5;
  --slate:#6A7391;
  --line:rgba(43,56,97,0.14);
  --line-soft:rgba(43,56,97,0.08);
  --radius:3px;
  --alto-header:76px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--paper);
  color:var(--navy);
  font-family:'IBM Plex Sans',sans-serif;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
body.sin-scroll{overflow:hidden;}
.wrap{max-width:1180px;margin:0 auto;padding:0 32px;}
h1,h2,h3{font-family:'Archivo',sans-serif;font-weight:900;letter-spacing:-0.01em;line-height:1.04;color:var(--navy);}
.mono{font-family:'IBM Plex Mono',monospace;}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}

/* el header es sticky: deja aire al saltar a una sección con # */
section[id]{scroll-margin-top:var(--alto-header);}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--sky);color:#fff;padding:10px 18px;font-size:14px;font-weight:600;
}
.skip-link:focus{left:0;}

/* dimension-line signature element */
.dim-line{display:flex;align-items:center;gap:10px;width:100%;}
.dim-line .seg{flex:1;height:1px;background:var(--line);position:relative;}
.dim-line .seg::before,.dim-line .seg::after{content:'';position:absolute;top:-4px;width:1px;height:9px;background:var(--line);}
.dim-line .seg::before{left:0;}
.dim-line .seg::after{right:0;}
.dim-line .tag{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:0.06em;color:var(--slate);white-space:nowrap;text-transform:uppercase;}

/* ---------- header ---------- */
header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,0.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s;
}
header.scrolled{box-shadow:0 2px 14px rgba(43,56,97,0.10);}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:var(--alto-header);}
.logo{font-family:'Archivo',sans-serif;font-weight:900;font-size:20px;color:var(--navy);letter-spacing:0.02em;}
.logo span{color:var(--sky);}
nav{display:flex;gap:36px;align-items:center;}
nav a{font-size:14px;color:var(--navy-soft);font-weight:500;transition:color .15s;}
nav a:hover{color:var(--sky-deep);}
nav a.activo{color:var(--sky-deep);}
nav a.nav-cta-movil{display:none;} /* el CTA del menú desplegable solo existe en móvil */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--sky);color:#fff;
  padding:12px 22px;font-weight:600;font-size:14px;
  border-radius:var(--radius);border:none;cursor:pointer;
  font-family:'IBM Plex Sans',sans-serif;
  transition:background .15s, transform .15s;
}
.btn:hover{background:var(--sky-deep);transform:translateY(-1px);}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--navy);}
.btn-ghost:hover{background:var(--paper-dim);}

/* botón hamburguesa (solo móvil) */
.nav-toggle{
  display:none;
  width:44px;height:44px;
  background:transparent;border:1px solid var(--line);border-radius:var(--radius);
  cursor:pointer;padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--navy);transition:transform .2s, opacity .2s;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- hero ---------- */
.hero{
  background-image:url(../img/hero.jpg);
  background-size:cover;
  background-position:center 50%;
  color:var(--navy);
  padding:140px 0 100px;
  min-height:600px;
  position:relative;
  overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(100deg,
    var(--paper-cool) 0%,
    var(--paper-cool) 42%,
    rgba(234,240,245,0.94) 52%,
    rgba(234,240,245,0.6) 62%,
    rgba(234,240,245,0.15) 74%,
    rgba(234,240,245,0) 86%
  );
}
.hero::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(to top, rgba(20,26,48,0.28), transparent 45%);
}
.hero-inner{position:relative;z-index:2;padding-bottom:64px;}
.eyebrow{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--sky-deep);letter-spacing:0.14em;text-transform:uppercase;margin-bottom:22px;display:flex;align-items:center;gap:10px;}
.eyebrow::before{content:'';width:22px;height:1px;background:var(--sky);}
.hero h1{font-size:clamp(38px,5.4vw,64px);max-width:820px;margin-bottom:24px;}
.hero h1 em{font-style:normal;color:var(--sky);}
.hero p.lead{font-size:18px;color:var(--navy-soft);max-width:520px;margin-bottom:38px;font-weight:500;}
.hero-cta{display:flex;gap:14px;margin-bottom:64px;flex-wrap:wrap;}

.specs-row{
  display:grid;grid-template-columns:repeat(2,1fr);
  border-top:1px solid var(--line);
  background:var(--paper);
  position:relative;
  z-index:2;
}
.specs-row .spec{padding:26px 0 26px 0;border-right:1px solid var(--line);}
.specs-row .spec:last-child{border-right:none;}
.specs-row .num{font-family:'Archivo',sans-serif;font-weight:900;font-size:34px;color:var(--navy);}
.specs-row .num span{color:var(--sky);}
.specs-row .label{font-family:'IBM Plex Mono',monospace;font-size:11.5px;color:var(--slate);text-transform:uppercase;letter-spacing:0.05em;margin-top:6px;}

/* ---------- section shell ---------- */
section{padding:88px 0;}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:48px;flex-wrap:wrap;}
.section-head h2{font-size:clamp(28px,3.4vw,42px);max-width:560px;}
.section-head .desc{max-width:340px;color:var(--slate);font-size:15px;}
.kicker{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--sky-deep);text-transform:uppercase;letter-spacing:0.12em;margin-bottom:14px;display:block;}
.kicker-claro{color:#8FD6F2;}
.kicker-highlight{
  font-family:'Archivo',sans-serif;font-weight:700;font-size:14px;
  color:var(--navy);background:rgba(41,171,226,0.12);
  padding:6px 14px;border-radius:2px;letter-spacing:0.04em;
  text-transform:uppercase;display:inline-block;margin-bottom:16px;
}

/* ---------- services ---------- */
.services{background:var(--paper);}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.service-card{background:var(--paper);padding:36px 30px;position:relative;}
.service-card .idx{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--sky-deep);margin-bottom:28px;display:block;}
.service-card h3{font-size:21px;margin-bottom:12px;}
.service-card p{font-size:14.5px;color:var(--slate);margin-bottom:22px;}
.service-card .tags{display:flex;gap:8px;flex-wrap:wrap;}
.service-card .tags span{font-family:'IBM Plex Mono',monospace;font-size:10.5px;color:var(--navy-soft);background:var(--paper-cool);padding:4px 9px;border-radius:2px;text-transform:uppercase;letter-spacing:.04em;}

/* ---------- proyectos ---------- */
.proyectos{background:var(--paper-dim);}
.obra-block{margin-bottom:60px;}
.obra-block:last-child{margin-bottom:0;}
.obra-head{margin-bottom:22px;max-width:640px;}
.obra-head h3{font-size:25px;margin-bottom:9px;}
.obra-head p{color:var(--slate);font-size:14.5px;}
.obra-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;border-radius:var(--radius);overflow:hidden;}
.obra-gallery.g-2{grid-template-columns:repeat(2,1fr);}
.obra-gallery img{aspect-ratio:4/3;width:100%;height:100%;object-fit:cover;display:block;background:var(--paper-cool);transition:transform .3s;cursor:zoom-in;}
.obra-gallery img:hover{transform:scale(1.02);}
.proj-note{margin-top:22px;font-size:12.5px;color:var(--slate);font-family:'IBM Plex Mono',monospace;}

/* ---------- nosotros ---------- */
.nosotros-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start;max-width:1180px;margin:0 auto;padding:0 32px;}
.nosotros-grid .lead-text{font-size:19px;font-weight:500;max-width:460px;margin-bottom:26px;}
.nosotros-grid p{color:var(--slate);font-size:15px;margin-bottom:20px;max-width:460px;}
.roles{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.roles span{font-family:'IBM Plex Mono',monospace;font-size:11.5px;border:1px solid var(--line);padding:7px 12px;border-radius:2px;color:var(--navy-soft);}
.company-logo{height:46px;width:auto;margin-bottom:22px;display:block;}
.mv-card{background:var(--paper-cool);color:var(--navy);padding:34px;border-radius:var(--radius);border:1px solid var(--line);}
.mv-card > .mv-eyebrow{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--slate);text-transform:uppercase;letter-spacing:0.12em;margin-bottom:24px;display:block;}
.mv-block{margin-bottom:0;}
.mv-block .kicker{color:var(--sky-deep);}
.mv-block p{color:var(--navy-soft);font-size:14.5px;}
.mv-divider{margin:24px 0;}
.mv-divider .seg{background:var(--line);}
.mv-divider .seg::before,.mv-divider .seg::after{background:var(--line);}

/* ---------- contacto ---------- */
.contacto{background:var(--navy);color:#fff;}
.contacto .wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:64px;}
.contacto h2{color:#fff;font-size:clamp(28px,3.4vw,40px);margin-bottom:18px;max-width:460px;}
.contacto p.lead{color:#C3CBE0;max-width:420px;margin-bottom:32px;font-size:15px;}
.contact-card{background:rgba(255,255,255,0.07);border:1px solid rgba(255,255,255,0.16);padding:32px;border-radius:var(--radius);}
.contact-row{display:flex;justify-content:space-between;gap:16px;padding:16px 0;border-bottom:1px solid rgba(255,255,255,0.16);font-size:14px;}
.contact-row:last-child{border-bottom:none;padding-bottom:0;}
.contact-row .k{font-family:'IBM Plex Mono',monospace;font-size:11px;color:#9FB3D8;text-transform:uppercase;letter-spacing:.05em;white-space:nowrap;}
.contact-row .v{text-align:right;color:#fff;font-weight:500;overflow-wrap:anywhere;}
.contact-row .v a:hover{color:#8FD6F2;}

.afiliaciones{background:var(--paper-cool);padding:56px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.afiliaciones-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;}
.afiliaciones-inner .text{max-width:480px;}
.afiliaciones-inner h3{font-size:23px;margin-bottom:8px;}
.afiliaciones-inner p{color:var(--slate);font-size:14.5px;}
.afil-logo-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 30px;display:flex;align-items:center;transition:border-color .15s;}
.afil-logo-card:hover{border-color:var(--sky);}
.afil-logo-card img{height:52px;width:auto;display:block;}
footer{background:var(--paper);color:var(--slate);padding:26px 0;border-top:1px solid var(--line);}
footer .wrap{display:flex;justify-content:space-between;font-size:12.5px;font-family:'IBM Plex Mono',monospace;flex-wrap:wrap;gap:12px;}

/* ---------- aparición al hacer scroll (activada por script.js) ---------- */
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .5s ease-out, transform .5s ease-out;}
.js .reveal.visible{opacity:1;transform:none;}

/* ---------- visor de fotos ---------- */
.lightbox{
  position:fixed;inset:0;z-index:200;
  display:flex;align-items:center;justify-content:center;
  background:rgba(20,26,48,0.94);
  padding:56px 24px;
}
.lightbox[hidden]{display:none;}
.lightbox .lb-img{max-width:min(1100px,92vw);max-height:82vh;width:auto;height:auto;object-fit:contain;border-radius:var(--radius);}
.lightbox button{
  background:rgba(255,255,255,0.10);border:1px solid rgba(255,255,255,0.24);
  color:#fff;cursor:pointer;border-radius:var(--radius);
  font-family:'IBM Plex Sans',sans-serif;line-height:1;
  transition:background .15s;
}
.lightbox button:hover{background:rgba(255,255,255,0.22);}
.lb-cerrar{position:absolute;top:20px;right:24px;width:42px;height:42px;font-size:26px;}
.lb-prev,.lb-next{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:64px;font-size:30px;}
.lb-prev{left:20px;}
.lb-next{right:20px;}
.lb-pie{
  position:absolute;left:0;right:0;bottom:18px;text-align:center;
  color:#C3CBE0;font-size:13px;padding:0 24px;
  font-family:'IBM Plex Sans',sans-serif;
}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .service-grid{grid-template-columns:1fr;}
  .nosotros-grid{grid-template-columns:1fr;gap:48px;}
  .contacto .wrap{grid-template-columns:1fr;gap:40px;}
  .section-head{flex-direction:column;align-items:flex-start;}

  .nav-toggle{display:flex;}
  .header-cta{display:none;}
  nav a.nav-cta-movil{display:inline-flex;margin-top:8px;}
  nav{
    display:none;
    position:absolute;top:var(--alto-header);left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:0;
    background:var(--paper);
    border-bottom:1px solid var(--line);
    box-shadow:0 12px 24px rgba(43,56,97,0.10);
    padding:8px 32px 24px;
  }
  nav.abierto{display:flex;}
  nav a{width:100%;padding:14px 0;font-size:16px;border-bottom:1px solid var(--line-soft);}
  nav a.nav-cta-movil{border-bottom:none;width:auto;padding:12px 22px;}
}

@media (max-width:640px){
  .wrap,.nosotros-grid{padding:0 20px;}
  nav{padding:8px 20px 24px;}
  section{padding:60px 0;}
  .hero{padding:90px 0 70px;min-height:0;}
  .hero-inner{padding-bottom:24px;}
  .hero-cta{margin-bottom:0;}
  /* en pantalla angosta el degradado horizontal no alcanza a cubrir el texto:
     acá se vuelve vertical para que el titular y los botones se lean sobre la foto */
  .hero::before{
    background:linear-gradient(180deg,
      rgba(234,240,245,0.97) 0%,
      rgba(234,240,245,0.93) 48%,
      rgba(234,240,245,0.55) 80%,
      rgba(234,240,245,0.12) 100%
    );
  }
  .btn-ghost{background:rgba(255,255,255,0.9);}
  .obra-gallery,.obra-gallery.g-2{grid-template-columns:repeat(2,1fr);}
  .afiliaciones-inner{flex-direction:column;align-items:flex-start;}
  .contact-row{flex-direction:column;gap:6px;}
  .contact-row .v{text-align:left;}
  footer .wrap{flex-direction:column;}
  .lb-prev,.lb-next{width:38px;height:52px;font-size:24px;}
}

/* respeta la preferencia de "menos movimiento" del sistema */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;}
  .js .reveal{opacity:1;transform:none;}
}