/* ============================================================
   Acueducto Vipos — estilos.css
   Hoja de estilos compartida por todas las páginas del sitio.
   Contiene: variables de marca, tipografía base, header/nav,
   footer, botones, utilidades comunes, menú móvil animado,
   botón flotante de WhatsApp y animaciones de aparición al
   hacer scroll.
   ============================================================ */

:root{
  --ink:#102530;
  --ink-soft:#3c545e;
  --paper:#F5F1E7;
  --paper-alt:#EEE7D6;
  --river:#1F6E8C;
  --river-deep:#0B3350;
  --clay:#C1732F;
  --clay-soft:#E3B48A;
  --line: rgba(16,37,48,0.14);
  --white:#FCFAF4;
  --font-display: 'Fraunces', serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{font-family: var(--font-body); background:var(--paper); color:var(--ink); line-height:1.6; -webkit-font-smoothing:antialiased;}
img,svg{display:block; max-width:100%;}
a{color:inherit; text-decoration:none;}
.wrap{max-width:1180px; margin:0 auto; padding:0 32px;}
h1,h2,h3{font-family:var(--font-display); font-weight:600; letter-spacing:-0.01em; color:var(--river-deep);}

.eyebrow{font-family:var(--font-mono); font-size:0.72rem; letter-spacing:0.14em; text-transform:uppercase; color:var(--clay); display:flex; align-items:center; gap:10px; margin-bottom:14px;}
.eyebrow::before{content:""; width:22px; height:1.5px; background:var(--clay); display:inline-block;}

.btn{display:inline-flex; align-items:center; gap:10px; font-family:var(--font-mono); font-size:0.82rem; letter-spacing:0.03em; padding:14px 24px; border-radius:2px; border:1.5px solid var(--river-deep); transition:all .2s ease; cursor:pointer; background:none;}
.btn-solid{background:var(--river-deep); color:var(--white);}
.btn-solid:hover{background:var(--river);}
.btn-solid:disabled{opacity:0.5; cursor:not-allowed;}
.btn-outline{border-color:var(--ink); color:var(--ink);}
.btn-outline:hover{background:var(--ink); color:var(--white);}

/* ---------- Header / navegación ---------- */
header{position:sticky; top:0; z-index:50; background:rgba(245,241,231,0.97); border-bottom:1px solid var(--line);}
.nav{display:flex; align-items:center; justify-content:space-between; padding:18px 0;}
.brand{display:flex; align-items:center; gap:12px; font-family:var(--font-display); font-weight:600; font-size:1.15rem; color:var(--river-deep);}
.brand-mark{width:34px; height:34px; flex-shrink:0;}
.nav-links{display:flex; gap:34px; font-size:0.92rem; font-weight:500;}
.nav-links a{position:relative; padding:4px 0;}
.nav-links a::after{content:""; position:absolute; left:0; bottom:0; width:0; height:1.5px; background:var(--clay); transition:width .25s ease;}
.nav-links a:hover::after{width:100%;}
.nav-links a.active::after{width:100%;}
.nav-cta{display:flex; align-items:center; gap:18px;}
.menu-btn{display:none; background:none; border:none; cursor:pointer; position:relative; z-index:60; touch-action:manipulation; -webkit-tap-highlight-color:rgba(16,37,48,0.15); padding:8px;}

/* Menú móvil: contenedor siempre presente, animado por altura/opacidad */
@media (max-width: 900px){
  .nav-links{
    display:none; flex-direction:column; position:fixed; top:64px; left:0; right:0;
    background:var(--paper); padding:20px 32px; border-bottom:1px solid var(--line); gap:16px;
    z-index:100; box-shadow:0 8px 20px rgba(16,37,48,0.15);
  }
  .nav-links.open{display:flex;}
  .menu-btn{display:block;}
  .wrap{padding:0 20px;}
}

/* ---------- Créditos de contratistas (hero / footer) ---------- */
.hero-builders{display:flex; align-items:center; gap:18px; flex-wrap:wrap; opacity:0.9;}
.hero-builders-label{font-family:var(--font-mono); font-size:0.68rem; letter-spacing:0.1em; text-transform:uppercase; color:var(--ink-soft);}
.hero-builders img{height:26px; width:auto; display:block;}
.hero-builders-divider, .footer-builders-divider{color:var(--line); font-size:1rem;}
.hero-builder-item{display:flex; align-items:center; gap:9px; color:var(--ink-soft); font-weight:500;}
.hero-builder-text{display:flex; flex-direction:column; line-height:1.25; font-family:'Oswald', sans-serif; text-transform:uppercase;}
.hero-builder-line1{font-size:1rem; font-weight:700; letter-spacing:0.01em;}
.hero-builder-line2{font-size:0.7rem; font-weight:600; letter-spacing:0.01em;}

.footer-builders{display:flex; align-items:center; justify-content:center; gap:20px; margin-top:32px; padding-top:28px; border-top:1px solid var(--line);}
.footer-builders img{height:24px; width:auto; display:block;}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--line); padding:48px 0; background:var(--paper-alt);}
.footer-grid{display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:20px;}
.footer-links{display:flex; gap:26px; font-size:0.88rem;}
.footer-note{font-size:0.8rem; color:var(--ink-soft); font-family:var(--font-mono);}

/* ---------- Breadcrumb (páginas internas) ---------- */
.breadcrumb{padding:28px 0 0; font-family:var(--font-mono); font-size:0.78rem; color:var(--ink-soft);}
.breadcrumb a{color:var(--river);}
.breadcrumb a:hover{text-decoration:underline;}

/* ---------- Botón flotante de WhatsApp ---------- */
.whatsapp-float{
  position:fixed; right:22px; bottom:22px; z-index:200;
  width:56px; height:56px; border-radius:50%; background:#25D366;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 6px 18px rgba(16,37,48,0.28); transition:transform .2s ease, box-shadow .2s ease;
}
.whatsapp-float:hover{transform:scale(1.08); box-shadow:0 8px 22px rgba(16,37,48,0.34);}
.whatsapp-float svg{width:30px; height:30px;}

/* ---------- Animación de aparición al hacer scroll ---------- */
.reveal{opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease;}
.reveal.in-view{opacity:1; transform:translateY(0);}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1; transform:none; transition:none;}
}

/* ---------- Lightbox genérico (novedades) ---------- */
.lightbox{
  display:none; position:fixed; inset:0; z-index:1000; background:rgba(11,37,48,0.94);
  align-items:center; justify-content:center; padding:60px 20px;
}
.lightbox.open{display:flex;}
.lightbox img{max-width:min(1100px, 92vw); max-height:82vh; object-fit:contain; border-radius:2px; box-shadow:0 20px 60px rgba(0,0,0,0.5);}
.lightbox-close{
  position:absolute; top:20px; right:24px; width:44px; height:44px; border-radius:50%;
  background:rgba(252,250,244,0.12); border:1px solid rgba(252,250,244,0.4); color:var(--white);
  display:flex; align-items:center; justify-content:center; cursor:pointer; font-size:1.4rem; line-height:1;
  transition:background .2s ease;
}
.lightbox-close:hover{background:rgba(252,250,244,0.25);}
.lightbox-nav{
  position:absolute; top:50%; transform:translateY(-50%); width:52px; height:52px; border-radius:50%;
  background:rgba(252,250,244,0.12); border:1px solid rgba(252,250,244,0.4); color:var(--white);
  display:flex; align-items:center; justify-content:center; cursor:pointer; font-size:1.6rem;
  transition:background .2s ease;
}
.lightbox-nav:hover{background:rgba(252,250,244,0.25);}
.lightbox-prev{left:16px;}
.lightbox-next{right:16px;}
.lightbox-counter{
  position:absolute; bottom:24px; left:50%; transform:translateX(-50%);
  font-family:var(--font-mono); font-size:0.78rem; color:rgba(252,250,244,0.8); letter-spacing:0.05em;
}
@media (max-width: 640px){
  .lightbox-nav{width:42px; height:42px; font-size:1.3rem;}
  .lightbox-prev{left:6px;} .lightbox-next{right:6px;}
}