/* ============================================================
   RENTERÍA — Ingeniería y Mantenimiento
   Sistema visual: hoja de planos técnicos / blueprint industrial
   ============================================================ */

:root{
  --navy-950:#0a1119;
  --navy-900:#0f1c2b;
  --navy-800:#17263a;
  --navy-700:#22384f;
  --navy-600:#334f6b;
  --copper:#a9793c;
  --copper-light:#c89a5e;
  --copper-dim:#7d5a2c;
  --stone:#8d8c84;
  --stone-light:#b8b6ac;
  --paper:#f2efe8;
  --paper-dim:#dedad0;
  --ink:#0d1520;
  --line:rgba(242,239,232,0.12);
  --line-strong:rgba(242,239,232,0.22);
  --font-head:'Space Grotesk', 'Archivo', sans-serif;
  --font-mono:'IBM Plex Mono', 'JetBrains Mono', monospace;
  --font-body:'Space Grotesk', sans-serif;
  --grid-max:1240px;
  --ease:cubic-bezier(.16,.8,.3,1);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--navy-950);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ margin:0; font-family:var(--font-head); font-weight:600; letter-spacing:-0.01em; }
p{ margin:0; }
button{ font-family:inherit; cursor:pointer; }

.wrap{
  max-width:var(--grid-max);
  margin:0 auto;
  padding:0 28px;
  position:relative;
}

/* ---------- utility: blueprint grid background ---------- */
.blueprint-bg{
  position:absolute; inset:0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
  mask-image:radial-gradient(ellipse 80% 70% at 50% 20%, black 40%, transparent 90%);
}

.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:0.22em;
  text-transform:uppercase;
  color:var(--copper-light);
  display:flex;
  align-items:center;
  gap:12px;
}
.eyebrow::before{
  content:'';
  width:26px; height:1px;
  background:var(--copper);
  display:inline-block;
}
.eyebrow .idx{ color:var(--stone-light); opacity:.7; }

/* ---------- header ---------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:100;
  background:rgba(10,17,25,0.82);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:border-color .3s var(--ease);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.brand{ display:flex; align-items:center; gap:12px; color:var(--paper); }
.brand-mark{ height:34px; width:34px; flex:none; color:var(--paper); }
.brand-word{ display:flex; flex-direction:column; line-height:1.15; }
.brand-word strong{ font-family:var(--font-head); font-size:16px; letter-spacing:.03em; color:var(--paper); font-weight:700; }
.brand-word em{ font-style:normal; font-family:var(--font-mono); font-size:9.5px; letter-spacing:.08em; text-transform:uppercase; color:var(--copper-light); margin-top:2px; }
.footer-brand{ display:flex; align-items:center; gap:12px; color:var(--paper); }
.footer-brand .brand-mark{ height:38px; width:38px; }
.footer-bottom a{ color:var(--copper-light); }
.footer-bottom a:hover{ text-decoration:underline; }

.main-nav{ display:flex; align-items:center; gap:36px; }
.main-nav a{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--stone-light);
  position:relative;
  padding:6px 0;
  transition:color .25s var(--ease);
}
.main-nav a::after{
  content:'';
  position:absolute; left:0; bottom:0; height:1px; width:0;
  background:var(--copper);
  transition:width .3s var(--ease);
}
.main-nav a:hover{ color:var(--paper); }
.main-nav a:hover::after{ width:100%; }

.header-actions{ display:flex; align-items:center; gap:18px; }
.tel-link{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--paper);
  border:1px solid var(--line-strong);
  padding:9px 16px;
  border-radius:2px;
  display:flex; align-items:center; gap:8px;
  transition:border-color .25s var(--ease), background .25s var(--ease);
}
.tel-link:hover{ border-color:var(--copper); background:rgba(169,121,60,.08); }
.tel-link .dot{ width:6px; height:6px; border-radius:50%; background:var(--copper); box-shadow:0 0 8px var(--copper); }

.nav-toggle{
  display:none;
  width:40px; height:40px;
  border:1px solid var(--line-strong);
  background:transparent;
  align-items:center; justify-content:center;
  color:var(--paper);
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:center;
  padding-top:76px;
  overflow:hidden;
  background:var(--navy-950);
}
.hero-video-bg{
  position:absolute; inset:0;
  overflow:hidden;
  z-index:0;
}
.bg-video{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit:cover;
  object-position:center 30%;
  filter:saturate(.85) contrast(1.05) brightness(.72);
  background:var(--navy-950);
}
.hero-video-scrim{
  position:absolute; inset:0;
  background:
    radial-gradient(ellipse 65% 55% at 78% 18%, rgba(169,121,60,.18), transparent 60%),
    linear-gradient(100deg, rgba(10,17,25,.94) 0%, rgba(10,17,25,.82) 38%, rgba(10,17,25,.55) 62%, rgba(10,17,25,.85) 100%),
    linear-gradient(180deg, rgba(10,17,25,.4) 0%, transparent 30%, rgba(10,17,25,.7) 100%);
}
.hero .blueprint-bg{ z-index:1; }
.hero .wrap{ position:relative; z-index:2; }
.scroll-cue{ z-index:2; }
.hero .wrap{ width:100%; padding-top:60px; padding-bottom:60px; }
.hero-grid{
  display:grid;
  grid-template-columns:1.15fr 0.85fr;
  gap:60px;
  align-items:center;
}
.hero-kicker{ margin-bottom:26px; }
.hero h1{
  font-size:clamp(2.6rem, 5.4vw, 4.6rem);
  line-height:0.98;
  color:var(--paper);
  text-transform:uppercase;
}
.hero h1 em{
  font-style:normal;
  color:var(--copper-light);
  display:block;
}
.hero-sub{
  margin-top:28px;
  max-width:46ch;
  color:var(--stone-light);
  font-size:1.05rem;
}
.hero-meta{
  margin-top:44px;
  display:flex;
  gap:36px;
  font-family:var(--font-mono);
}
.hero-meta .item{ border-left:1px solid var(--line-strong); padding-left:16px; }
.hero-meta .num{ font-size:1.6rem; color:var(--paper); display:block; }
.hero-meta .lbl{ font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--stone); }

.hero-cta{ margin-top:44px; display:flex; gap:16px; flex-wrap:wrap; }
.btn{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.1em;
  text-transform:uppercase;
  padding:15px 26px;
  border-radius:2px;
  display:inline-flex;
  align-items:center;
  gap:10px;
  transition:all .25s var(--ease);
  border:1px solid transparent;
}
.btn-primary{ background:var(--copper); color:var(--navy-950); }
.btn-primary:hover{ background:var(--copper-light); transform:translateY(-2px); }
.btn-ghost{ border-color:var(--line-strong); color:var(--paper); }
.btn-ghost:hover{ border-color:var(--copper); color:var(--copper-light); }

/* hero technical diagram panel */
.hero-panel{
  position:relative;
  aspect-ratio:1/1.08;
  border:1px solid var(--line-strong);
  background:linear-gradient(160deg, rgba(255,255,255,.02), transparent);
}
.hero-panel svg{ width:100%; height:100%; }
.hero-panel .corner{
  position:absolute; width:14px; height:14px;
  border:1px solid var(--copper);
}
.corner.tl{ top:-1px; left:-1px; border-right:none; border-bottom:none; }
.corner.tr{ top:-1px; right:-1px; border-left:none; border-bottom:none; }
.corner.bl{ bottom:-1px; left:-1px; border-right:none; border-top:none; }
.corner.br{ bottom:-1px; right:-1px; border-left:none; border-top:none; }

.scroll-cue{
  position:absolute; bottom:34px; left:50%; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:10px;
  font-family:var(--font-mono); font-size:10.5px; letter-spacing:.2em;
  color:var(--stone); text-transform:uppercase;
}
.scroll-cue .line{ width:1px; height:40px; background:linear-gradient(var(--copper), transparent); animation:scrollpulse 2s var(--ease) infinite; }
@keyframes scrollpulse{ 0%{ opacity:.2; } 50%{ opacity:1; } 100%{ opacity:.2; } }

/* ---------- section shell ---------- */
section{ position:relative; padding:120px 0; }
.section-head{ max-width:720px; margin-bottom:64px; }
.section-head h2{
  margin-top:20px;
  font-size:clamp(1.9rem, 3.4vw, 2.8rem);
  text-transform:uppercase;
  color:var(--paper);
}
.section-head p{ margin-top:18px; color:var(--stone-light); font-size:1.02rem; max-width:60ch; }
.divider{
  border:none; border-top:1px solid var(--line);
  margin:0;
}

/* ---------- quienes somos ---------- */
#nosotros{ background:var(--navy-900); }
.nosotros-grid{ display:grid; grid-template-columns:1fr 1fr; gap:70px; align-items:start; }
.nosotros-copy p{ color:var(--stone-light); font-size:1.05rem; margin-bottom:20px; }
.pillars{ display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); }
.pillar{ background:var(--navy-900); padding:28px 24px; }
.pillar .n{ font-family:var(--font-mono); color:var(--copper); font-size:12px; letter-spacing:.1em; }
.pillar h4{ margin-top:14px; font-size:1.15rem; color:var(--paper); text-transform:uppercase; letter-spacing:.02em; }

/* ---------- mision / vision ---------- */
#proposito{ background:var(--navy-950); }
.mv-grid{ display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); }
.mv-card{ background:var(--navy-950); padding:44px; position:relative; }
.mv-card .tag{ font-family:var(--font-mono); font-size:11px; letter-spacing:.18em; color:var(--copper-light); text-transform:uppercase; }
.mv-card h3{ margin-top:16px; font-size:1.5rem; color:var(--paper); text-transform:uppercase; }
.mv-card p{ margin-top:18px; color:var(--stone-light); }
.mv-list{ margin-top:22px; display:flex; flex-direction:column; gap:12px; }
.mv-list li{ display:flex; gap:12px; color:var(--stone-light); font-size:.96rem; align-items:flex-start; }
.mv-list .marker{ font-family:var(--font-mono); color:var(--copper); flex:none; }

/* ---------- especialidades ---------- */
#especialidades{ background:var(--navy-900); }
.spec-grid{ display:grid; grid-template-columns:repeat(2, 1fr); gap:1px; background:var(--line); border:1px solid var(--line); }
.spec-card{ background:var(--navy-900); padding:36px; }
.spec-card-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:22px; }
.spec-card-head h3{ font-size:1.1rem; color:var(--paper); text-transform:uppercase; letter-spacing:.03em; }
.spec-card-head .code{ font-family:var(--font-mono); font-size:11px; color:var(--copper); border:1px solid var(--copper-dim); padding:3px 8px; }
.spec-icon{ width:30px; height:30px; color:var(--copper-light); margin-bottom:18px; }
.spec-card ul li{
  font-size:.92rem; color:var(--stone-light);
  padding:11px 0; border-top:1px solid var(--line);
  display:flex; gap:10px;
}
.spec-card ul li:first-child{ border-top:none; }
.spec-card ul li::before{ content:'—'; color:var(--copper); flex:none; }

/* ---------- proyectos ---------- */
#proyectos{ background:var(--navy-950); }
.gallery-filters{ display:flex; gap:10px; flex-wrap:wrap; margin-bottom:40px; }
.filter-btn{
  font-family:var(--font-mono); font-size:11.5px; letter-spacing:.08em; text-transform:uppercase;
  padding:9px 16px; border:1px solid var(--line-strong); color:var(--stone-light);
  background:transparent; transition:all .25s var(--ease);
}
.filter-btn:hover{ border-color:var(--copper); color:var(--paper); }
.filter-btn.active{ background:var(--copper); border-color:var(--copper); color:var(--navy-950); }

.gallery-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:2px;
  background:var(--line);
  border:1px solid var(--line);
}
.gallery-item{
  position:relative;
  aspect-ratio:4/3.2;
  overflow:hidden;
  background:var(--navy-900);
  cursor:pointer;
}
.gallery-item img{
  width:100%; height:100%; object-fit:cover;
  filter:saturate(.9) contrast(1.02);
  transform:scale(1.02);
  transition:transform .6s var(--ease), filter .4s var(--ease);
}
.gallery-item:hover img{ transform:scale(1.09); filter:saturate(1.05) contrast(1.05); }
.gallery-item .overlay{
  position:absolute; inset:0;
  background:linear-gradient(180deg, transparent 40%, rgba(10,17,25,.92) 100%);
  display:flex; flex-direction:column; justify-content:flex-end;
  padding:18px;
  opacity:0; transition:opacity .3s var(--ease);
}
.gallery-item:hover .overlay{ opacity:1; }
.gallery-item .g-idx{
  font-family:var(--font-mono); font-size:10.5px; color:var(--copper-light); letter-spacing:.1em;
}
.gallery-item .g-label{ margin-top:6px; font-size:.88rem; color:var(--paper); text-transform:uppercase; letter-spacing:.02em; line-height:1.3; }
.gallery-item.hidden{ display:none; }

.gallery-more{
  text-align:center; margin-top:44px;
}

/* ---------- confianza / repse ---------- */
#confianza{ background:var(--navy-900); }
.confianza-grid{ display:grid; grid-template-columns:0.9fr 1.1fr; gap:64px; align-items:center; }
.badge-block{
  border:1px solid var(--line-strong); padding:36px; position:relative;
}
.badge-block .code{ font-family:var(--font-mono); font-size:11px; color:var(--copper); letter-spacing:.14em; }
.badge-block h3{ margin-top:14px; font-size:1.7rem; color:var(--paper); text-transform:uppercase; }
.badge-block p{ margin-top:14px; color:var(--stone-light); font-size:.95rem; }
.check-list{ margin-top:26px; display:flex; flex-direction:column; gap:14px; }
.check-list li{ display:flex; gap:12px; align-items:flex-start; color:var(--stone-light); font-size:.94rem; }
.check-list svg{ flex:none; width:18px; height:18px; color:var(--copper-light); margin-top:2px; }

/* ---------- contacto ---------- */
#contacto{ background:var(--navy-950); }
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:1px; background:var(--line); border:1px solid var(--line); }
.contact-panel{ background:var(--navy-950); padding:48px; }
.contact-panel h3{ font-size:1.3rem; color:var(--paper); text-transform:uppercase; margin-bottom:22px; }
.contact-row{ display:flex; flex-direction:column; gap:22px; }
.contact-line{ display:flex; align-items:center; gap:16px; padding:16px 0; border-top:1px solid var(--line); }
.contact-line:first-child{ border-top:none; }
.contact-line svg{ width:20px; height:20px; color:var(--copper-light); flex:none; }
.contact-line .lbl{ font-family:var(--font-mono); font-size:10.5px; letter-spacing:.1em; color:var(--stone); text-transform:uppercase; display:block; }
.contact-line .val{ font-size:1.05rem; color:var(--paper); margin-top:3px; }

.cf-field{ margin-bottom:18px; }
.cf-field label{ font-family:var(--font-mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase; color:var(--stone-light); display:block; margin-bottom:8px; }
.cf-field input, .cf-field textarea{
  width:100%; background:transparent; border:1px solid var(--line-strong);
  color:var(--paper); padding:13px 14px; font-family:var(--font-body); font-size:.95rem;
  border-radius:2px;
}
.cf-field input:focus, .cf-field textarea:focus{ outline:none; border-color:var(--copper); }
.cf-field textarea{ resize:vertical; min-height:100px; }

.cf-hp{ position:absolute; left:-9999px; width:1px; height:1px; overflow:hidden; }
.cf-status{ margin-top:14px; min-height:1.4em; font-family:var(--font-mono); font-size:12.5px; letter-spacing:.04em; }
.cf-status.ok{ color:#7fd39a; }
.cf-status.err{ color:#e58a7a; }
.btn[disabled]{ opacity:.6; cursor:wait; }

/* ---------- section background videos ---------- */
.has-video{ overflow:hidden; }
.has-video > .wrap{ position:relative; z-index:2; }
.section-video{ position:absolute; inset:0; z-index:0; overflow:hidden; pointer-events:none; }
.section-video .bg-video{ filter:saturate(.8) contrast(1.05) brightness(.6); }
.section-video-scrim{
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(10,17,25,.93) 0%, rgba(10,17,25,.78) 30%, rgba(10,17,25,.78) 70%, rgba(10,17,25,.93) 100%);
}
#especialidades .spec-card{ background:rgba(15,28,43,.84); }
#proyectos .gallery-item{ background:rgba(15,28,43,.9); }
#confianza .badge-block{ background:rgba(10,17,25,.6); }
#nosotros .pillar{ background:rgba(15,28,43,.84); }
#nosotros .pillars{ background:var(--line); }
#proposito .mv-card{ background:rgba(10,17,25,.82); }
#contacto .contact-panel{ background:rgba(10,17,25,.84); }

/* ---------- footer ---------- */
footer{ background:var(--navy-900); border-top:1px solid var(--line); padding:56px 0 30px; }
.footer-grid{ display:flex; justify-content:space-between; align-items:flex-start; flex-wrap:wrap; gap:40px; }
.footer-brand{ display:flex; align-items:center; gap:12px; }
.footer-brand img{ height:34px; }
.footer-nav{ display:flex; gap:28px; flex-wrap:wrap; }
.footer-nav a{ font-family:var(--font-mono); font-size:11.5px; letter-spacing:.08em; text-transform:uppercase; color:var(--stone-light); }
.footer-nav a:hover{ color:var(--copper-light); }
.footer-bottom{
  margin-top:44px; padding-top:22px; border-top:1px solid var(--line);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px;
  font-family:var(--font-mono); font-size:11px; color:var(--stone); letter-spacing:.04em;
}

/* ---------- reveal on scroll ---------- */
[data-reveal]{ opacity:0; transform:translateY(24px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
[data-reveal].is-visible{ opacity:1; transform:translateY(0); }

/* ---------- whatsapp fab ---------- */
.whatsapp-fab{
  position:fixed; right:24px; bottom:24px; z-index:150;
  width:58px; height:58px; border-radius:50%;
  background:#1f2c22;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 8px 24px rgba(0,0,0,.4);
  border:1px solid rgba(37,211,102,.35);
  transition:transform .25s var(--ease), box-shadow .25s var(--ease);
}
.whatsapp-fab:hover{ transform:translateY(-3px) scale(1.05); box-shadow:0 12px 30px rgba(0,0,0,.5); }
.whatsapp-fab svg{ width:32px; height:32px; position:relative; z-index:1; }
.whatsapp-fab-ping{
  position:absolute; inset:0; border-radius:50%;
  background:rgba(37,211,102,.45);
  animation:wa-ping 2.4s ease-out infinite;
}
@keyframes wa-ping{
  0%{ transform:scale(1); opacity:.7; }
  80%{ transform:scale(1.7); opacity:0; }
  100%{ transform:scale(1.7); opacity:0; }
}
@media (max-width:640px){
  .whatsapp-fab{ right:16px; bottom:16px; width:52px; height:52px; }
  .whatsapp-fab svg{ width:28px; height:28px; }
}

/* ---------- lightbox ---------- */
.lightbox{
  position:fixed; inset:0; z-index:200;
  background:rgba(10,17,25,.96);
  display:none; align-items:center; justify-content:center;
  padding:40px;
}
.lightbox.open{ display:flex; }
.lightbox figure{ max-width:1000px; max-height:86vh; margin:0; }
.lightbox img{ max-height:78vh; width:auto; margin:0 auto; border:1px solid var(--line-strong); }
.lightbox figcaption{
  margin-top:16px; text-align:center; font-family:var(--font-mono);
  font-size:12px; letter-spacing:.08em; text-transform:uppercase; color:var(--stone-light);
}
.lightbox-close{
  position:absolute; top:30px; right:34px;
  width:44px; height:44px; border:1px solid var(--line-strong);
  display:flex; align-items:center; justify-content:center; color:var(--paper);
  background:transparent;
}
.lightbox-close:hover{ border-color:var(--copper); color:var(--copper-light); }

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hero-grid{ grid-template-columns:1fr; }
  .hero-panel{ max-width:420px; margin:0 auto; }
  .nosotros-grid{ grid-template-columns:1fr; gap:44px; }
  .mv-grid{ grid-template-columns:1fr; }
  .spec-grid{ grid-template-columns:1fr; }
  .confianza-grid{ grid-template-columns:1fr; }
  .contact-grid{ grid-template-columns:1fr; }
  .gallery-grid{ grid-template-columns:repeat(2,1fr); }
  .main-nav{ display:none; }
  .nav-toggle{ display:flex; }
}
@media (max-width:640px){
  .hero-meta{ flex-wrap:wrap; row-gap:20px; }
  .gallery-grid{ grid-template-columns:repeat(2,1fr); }
  .gallery-item{ aspect-ratio:1/1; }
  .gallery-item .overlay{ opacity:1; padding:10px; background:linear-gradient(180deg, transparent 55%, rgba(10,17,25,.9) 100%); }
  .gallery-item .g-idx{ display:none; }
  .gallery-item .g-label{ font-size:.7rem; }
  [data-reveal]{ transition-duration:.45s; transform:translateY(12px); }
  .pillars{ grid-template-columns:1fr; }
  section{ padding:84px 0; }
  .badge-block, .contact-panel, .mv-card, .spec-card{ padding:26px; }
}