:root{
  --black:#0a0908;
  --panel:#141312;
  --panel-2:#1e1c1a;
  --steel:#3a3733;
  --yellow:#f5b400;
  --yellow-dim:#caa023;
  --white:#f7f5f0;
  --gray:#a8a39a;
  --rust:#c75c1f;
  --radius:2px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--black);
  color:var(--white);
  font-family:'Inter',sans-serif;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--yellow);color:var(--black);}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.01ms !important; animation-iteration-count:1 !important; transition-duration:0.01ms !important; scroll-behavior:auto !important;}
}

h1,h2,h3,h4{font-family:'Oswald',sans-serif;text-transform:uppercase;letter-spacing:0.02em;line-height:1.05;}
.eyebrow{
  font-family:'Space Mono',monospace;
  font-size:12px;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--yellow);
  display:flex;align-items:center;gap:10px;
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--yellow);}
.hero-content .eyebrow,
.hero h1,
.hero p.lead{
  text-shadow:0 1px 3px rgba(0,0,0,0.9), 0 0 22px rgba(10,9,8,0.85);
}

a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
.container{max-width:1240px;margin:0 auto;padding:0 32px;}

/* ===== Texture overlay: corrugated grain ===== */
.grain{
  position:fixed;inset:0;pointer-events:none;z-index:999;
  opacity:0.035;
  background-image:repeating-linear-gradient(115deg, #fff 0px, #fff 1px, transparent 1px, transparent 3px);
  mix-blend-mode:overlay;
}

/* ===== NAV ===== */
nav{
  position:fixed;top:0;left:0;right:0;z-index:500;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 40px;
  background:rgba(10,9,8,0.78);
  backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(245,180,0,0.12);
  transition:padding 0.3s ease, background 0.3s ease;
}
nav.scrolled{padding:12px 40px;background:rgba(10,9,8,0.95);}
.nav-logo{display:flex;align-items:center;gap:12px;}
.nav-logo img{height:42px;width:auto;transition:height 0.3s ease;}
nav.scrolled .nav-logo img{height:34px;}
.nav-logo-text{font-family:'Oswald',sans-serif;font-size:15px;letter-spacing:0.05em;}
.nav-logo-text b{color:var(--yellow);}
.nav-links{display:flex;gap:36px;align-items:center;}
.nav-links a{
  font-size:13px;letter-spacing:0.08em;text-transform:uppercase;
  position:relative;color:var(--gray);transition:color 0.25s;
  padding:4px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:1px;background:var(--yellow);
  transition:width 0.3s ease;
}
.nav-links a:hover{color:var(--white);}
.nav-links a:hover::after{width:100%;}
.nav-cta{
  border:1px solid var(--yellow);color:var(--yellow) !important;
  padding:10px 22px;font-size:12px;letter-spacing:0.1em;
  transition:all 0.3s ease;
}
.nav-cta::after{display:none;}
.nav-cta:hover{background:var(--yellow);color:var(--black) !important;}
.burger{display:none;flex-direction:column;gap:5px;}
.burger span{width:24px;height:2px;background:var(--white);}

/* ===== HERO ===== */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;align-items:center;
  padding:140px 0 80px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:
    linear-gradient(180deg, rgba(10,9,8,0) 0%, rgba(10,9,8,0.4) 60%, var(--black) 100%),
    radial-gradient(ellipse at 75% 20%, rgba(245,180,0,0.08), transparent 55%);
}
.roof-panels{
  position:absolute; inset:0; z-index:0;
  opacity:0.9;
  -webkit-mask-image:linear-gradient(100deg, transparent 0%, transparent 38%, #000 58%, #000 100%);
  mask-image:linear-gradient(100deg, transparent 0%, transparent 38%, #000 58%, #000 100%);
}
.panel{
  position:absolute;
  height:3px;
  background:linear-gradient(90deg, transparent, var(--yellow-dim), transparent);
  opacity:0;
  transform-origin:left center;
  animation:slidePanel 1.1s cubic-bezier(.16,1,.3,1) forwards;
}
@keyframes slidePanel{
  from{opacity:0; transform:translateX(-60px) scaleX(0.7);}
  to{opacity:0.55; transform:translateX(0) scaleX(1);}
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.1fr 0.9fr;gap:60px;
  align-items:center;
}
.hero-content .eyebrow{opacity:0;animation:riseIn 0.8s ease forwards 0.2s;}
.hero h1{
  font-size:clamp(42px,6vw,76px);
  font-weight:700;
  opacity:0;
  animation:riseIn 0.9s cubic-bezier(.16,1,.3,1) forwards 0.4s;
}
.hero h1 .accent{color:var(--yellow);display:block;}
.hero p.lead{
  margin-top:24px;max-width:480px;
  color:var(--gray);font-size:17px;line-height:1.7;
  opacity:0;animation:riseIn 0.8s ease forwards 0.65s;
}
@keyframes riseIn{
  from{opacity:0;transform:translateY(24px);}
  to{opacity:1;transform:translateY(0);}
}
.hero-actions{
  display:flex;gap:18px;margin-top:40px;
  opacity:0;animation:riseIn 0.8s ease forwards 0.85s;
}
.btn-primary{
  background:var(--yellow);color:var(--black);
  padding:16px 32px;font-size:13px;letter-spacing:0.08em;text-transform:uppercase;font-weight:600;
  display:inline-flex;align-items:center;gap:10px;
  transition:transform 0.3s cubic-bezier(.16,1,.3,1), background 0.3s ease, box-shadow 0.3s ease;
  box-shadow:0 0 0 0 rgba(245,180,0,0.0);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 30px -10px rgba(245,180,0,0.5);}
.btn-ghost{
  border:1px solid var(--steel);color:var(--white);
  padding:16px 28px;font-size:13px;letter-spacing:0.08em;text-transform:uppercase;
  transition:border-color 0.3s ease, color 0.3s ease;
}
.btn-ghost:hover{border-color:var(--yellow);color:var(--yellow);}

.hero-stats{
  display:flex;gap:36px;margin-top:64px;
  opacity:0;animation:riseIn 0.8s ease forwards 1.05s;
}
.stat b{
  font-family:'Oswald',sans-serif;font-size:32px;color:var(--yellow);display:block;
}
.stat span{font-size:12px;color:var(--gray);letter-spacing:0.04em;}

/* Hero visual: animated standing-seam panel stack */
.hero-visual{
  position:relative;height:560px;
  opacity:0;animation:riseIn 1s cubic-bezier(.16,1,.3,1) forwards 0.5s;
}
.seam-stack{
  position:relative;width:100%;height:100%;
  display:flex;align-items:center;justify-content:center;
}
.seam{
  position:absolute;
  width:88%;
  height:46px;
  background:linear-gradient(180deg, var(--panel-2), var(--panel));
  border-top:1px solid rgba(245,180,0,0.5);
  border-bottom:1px solid rgba(0,0,0,0.6);
  clip-path:polygon(0 0,100% 0,96% 100%,4% 100%);
}
.seam::after{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:var(--yellow);opacity:0.55;
}
.logo-frame{
  position:relative;z-index:3;
  width:78%;
  border:1px solid rgba(245,180,0,0.25);
  background:radial-gradient(ellipse at center, rgba(245,180,0,0.06), transparent 70%);
  padding:30px;
  display:flex;align-items:center;justify-content:center;
  animation:float 6s ease-in-out infinite;
}
.logo-frame img{width:100%;height:auto;display:block;filter:drop-shadow(0 20px 40px rgba(0,0,0,0.6));}
@keyframes float{
  0%,100%{transform:translateY(0);}
  50%{transform:translateY(-12px);}
}
.scroll-cue{
  position:absolute;bottom:28px;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:8px;
  font-family:'Space Mono',monospace;font-size:10px;letter-spacing:0.2em;color:var(--gray);
  z-index:3;
}
.scroll-cue .line{width:1px;height:36px;background:linear-gradient(var(--yellow),transparent);animation:scrollLine 1.8s ease-in-out infinite;}
@keyframes scrollLine{0%{transform:scaleY(0);transform-origin:top;}50%{transform:scaleY(1);transform-origin:top;}50.01%{transform-origin:bottom;}100%{transform:scaleY(0);transform-origin:bottom;}}

/* ===== SECTION GENERIC ===== */
section{padding:130px 0;position:relative;}
.section-head{max-width:640px;margin-bottom:64px;}
.section-head h2{font-size:clamp(30px,4vw,46px);}
.section-head p{color:var(--gray);margin-top:18px;font-size:16px;line-height:1.7;}
.reveal{opacity:0;transform:translateY(36px);transition:opacity 0.8s cubic-bezier(.16,1,.3,1), transform 0.8s cubic-bezier(.16,1,.3,1);}
.reveal.in{opacity:1;transform:translateY(0);}

/* ===== MISION / VISION / VALORES ===== */
.mvv{
  background:var(--panel);
  border-top:1px solid rgba(245,180,0,0.1);
  border-bottom:1px solid rgba(245,180,0,0.1);
}
.mvv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(245,180,0,0.12);}
.mvv-card{
  background:var(--panel);padding:48px 38px;
  transition:background 0.4s ease;
  position:relative;overflow:hidden;
}
.mvv-card:hover{background:var(--panel-2);}
.mvv-card::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:3px;
  background:var(--yellow);transform:scaleX(0);transform-origin:left;
  transition:transform 0.5s cubic-bezier(.16,1,.3,1);
}
.mvv-card:hover::before{transform:scaleX(1);}
.mvv-icon{
  width:46px;height:46px;border:1px solid var(--yellow-dim);
  display:flex;align-items:center;justify-content:center;margin-bottom:28px;
  color:var(--yellow);transform:rotate(45deg);
}
.mvv-icon svg{transform:rotate(-45deg);width:20px;height:20px;}
.mvv-card h3{font-size:21px;margin-bottom:16px;}
.mvv-card p{color:var(--gray);font-size:15px;line-height:1.75;}
.mvv-card .tag{
  font-family:'Space Mono',monospace;font-size:11px;color:var(--yellow);
  letter-spacing:0.15em;margin-bottom:14px;display:block;
}

/* ===== SERVICIOS ===== */
.services-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.service-card{
  background:var(--panel);border:1px solid rgba(255,255,255,0.06);
  padding:36px 30px;position:relative;
  transition:transform 0.4s cubic-bezier(.16,1,.3,1), border-color 0.4s ease;
  overflow:hidden;
  cursor:pointer;
}
.service-card:focus-visible{outline:2px solid var(--yellow);outline-offset:3px;}
.service-card::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg, rgba(245,180,0,0.035) 0px, rgba(245,180,0,0.035) 1px, transparent 1px, transparent 14px);
  opacity:0;transition:opacity 0.4s ease;
}
.service-card:hover{transform:translateY(-8px);border-color:var(--yellow-dim);}
.service-card:hover::after{opacity:1;}
.service-num{
  font-family:'Space Mono',monospace;font-size:12px;color:var(--yellow-dim);margin-bottom:24px;display:block;
}
.service-card h3{font-size:19px;margin-bottom:14px;position:relative;z-index:1;}
.service-card p{color:var(--gray);font-size:14.5px;line-height:1.7;position:relative;z-index:1;}
.service-card .more{
  margin-top:20px;font-size:12px;letter-spacing:0.08em;text-transform:uppercase;color:var(--yellow);
  display:inline-flex;align-items:center;gap:6px;opacity:0;transform:translateX(-6px);
  transition:all 0.3s ease;position:relative;z-index:1;
}
.service-card:hover .more{opacity:1;transform:translateX(0);}

/* ===== PROCESO ===== */
.process{background:var(--panel);}
.process-track{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  position:relative;margin-top:20px;
}
.process-track::before{
  content:"";position:absolute;top:26px;left:6%;right:6%;height:1px;
  background:repeating-linear-gradient(90deg, var(--steel) 0, var(--steel) 8px, transparent 8px, transparent 16px);
}
.process-step{padding:0 24px;position:relative;}
.process-step .num{
  width:52px;height:52px;border-radius:50%;
  background:var(--black);border:1px solid var(--yellow-dim);
  display:flex;align-items:center;justify-content:center;
  font-family:'Oswald',sans-serif;color:var(--yellow);font-size:18px;
  position:relative;z-index:1;margin-bottom:26px;
  transition:background 0.3s ease, color 0.3s ease;
}
.process-step:hover .num{background:var(--yellow);color:var(--black);}
.process-step h4{font-size:17px;margin-bottom:10px;}
.process-step p{color:var(--gray);font-size:14px;line-height:1.6;}

/* ===== WHY US / STATS ===== */
.why{
  display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center;
}
.why-list{margin-top:30px;}
.why-item{
  display:flex;gap:20px;padding:22px 0;border-bottom:1px solid rgba(255,255,255,0.07);
}
.why-item .ico{color:var(--yellow);font-size:18px;flex-shrink:0;}
.why-item h4{font-size:16px;margin-bottom:6px;letter-spacing:0.01em;}
.why-item p{color:var(--gray);font-size:14px;line-height:1.6;}
.why-visual{
  position:relative;background:var(--panel);border:1px solid rgba(245,180,0,0.12);
  padding:48px;min-height:420px;
  display:flex;flex-direction:column;justify-content:center;gap:34px;
}
.kpi{display:flex;align-items:baseline;gap:14px;}
.kpi b{
  font-family:'Oswald',sans-serif;font-size:54px;color:var(--yellow);
  font-variant-numeric:tabular-nums;
}
.kpi span{color:var(--gray);font-size:13.5px;}
.kpi-bar{height:4px;background:var(--steel);margin-top:10px;overflow:hidden;}
.kpi-bar i{display:block;height:100%;background:var(--yellow);width:0;transition:width 1.4s cubic-bezier(.16,1,.3,1);}

/* ===== TESTIMONIO / CTA BANNER ===== */
.cta-banner{
  background:linear-gradient(120deg, var(--panel) 0%, var(--panel-2) 100%);
  border-top:1px solid rgba(245,180,0,0.15);
  position:relative;overflow:hidden;
  text-align:center;
}
.cta-banner::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg, rgba(245,180,0,0.03) 0px, rgba(245,180,0,0.03) 2px, transparent 2px, transparent 30px);
}
.cta-banner h2{font-size:clamp(28px,4.5vw,48px);max-width:760px;margin:0 auto;position:relative;}
.cta-banner h2 .accent{color:var(--yellow);}
.cta-banner p{color:var(--gray);margin:22px auto 40px;max-width:520px;position:relative;}
.cta-banner .hero-actions{justify-content:center;animation:none;opacity:1;position:relative;}

/* ===== CONTACTO ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;}
.contact-card{
  background:var(--panel);border:1px solid rgba(255,255,255,0.07);padding:14px 22px;
  display:flex;align-items:center;gap:18px;margin-bottom:14px;
  transition:border-color 0.3s ease, transform 0.3s ease;
}
.contact-card:hover{border-color:var(--yellow-dim);transform:translateX(6px);}
.contact-card .ico{
  width:40px;height:40px;background:var(--black);border:1px solid var(--yellow-dim);
  display:flex;align-items:center;justify-content:center;color:var(--yellow);flex-shrink:0;font-size:15px;
}
.contact-card b{font-size:15px;display:block;}
.contact-card span{color:var(--gray);font-size:13px;}

.form-wrap{background:var(--panel);border:1px solid rgba(255,255,255,0.07);padding:40px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{margin-bottom:20px;}
.field label{
  font-size:11px;letter-spacing:0.1em;text-transform:uppercase;color:var(--gray);
  display:block;margin-bottom:9px;
}
.field input,.field select,.field textarea{
  width:100%;background:var(--black);border:1px solid var(--steel);
  color:var(--white);padding:13px 14px;font-family:'Inter',sans-serif;font-size:14px;
  transition:border-color 0.3s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--yellow);}
.field textarea{resize:vertical;min-height:100px;}
.submit-btn{
  width:100%;background:var(--yellow);color:var(--black);padding:16px;
  font-size:13px;letter-spacing:0.08em;text-transform:uppercase;font-weight:600;
  transition:transform 0.3s ease, box-shadow 0.3s ease;
}
.submit-btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px -10px rgba(245,180,0,0.5);}
.form-success{
  display:none;text-align:center;padding:30px 0;color:var(--yellow);font-family:'Oswald',sans-serif;font-size:18px;
}

/* ===== FOOTER ===== */
footer{
  border-top:1px solid rgba(245,180,0,0.1);padding:60px 0 30px;
}
.footer-top{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:40px;margin-bottom:50px;}
.footer-brand{display:flex;align-items:center;gap:14px;}
.footer-brand img{height:46px;}
.footer-tag{color:var(--gray);font-size:13px;margin-top:10px;max-width:280px;}
.footer-cols{display:flex;gap:70px;flex-wrap:wrap;}
.footer-col h5{
  font-size:12px;letter-spacing:0.12em;text-transform:uppercase;color:var(--yellow);margin-bottom:18px;
}
.footer-col a{display:block;color:var(--gray);font-size:14px;margin-bottom:11px;transition:color 0.25s;}
.footer-col a:hover{color:var(--white);}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,0.06);padding-top:26px;flex-wrap:wrap;gap:12px;
}
.footer-bottom span{color:var(--gray);font-size:12.5px;font-family:'Space Mono',monospace;}

/* back to top */
.totop{
  position:fixed;bottom:28px;right:28px;z-index:400;
  width:46px;height:46px;background:var(--yellow);color:var(--black);
  display:flex;align-items:center;justify-content:center;font-size:18px;
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity 0.3s ease, transform 0.3s ease;
}
.totop.show{opacity:1;pointer-events:auto;transform:translateY(0);}

@media (max-width:980px){
  .roof-panels{display:none;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-visual{height:380px;order:-1;}
  .mvv-grid{grid-template-columns:1fr;}
  .services-grid{grid-template-columns:1fr 1fr;}
  .process-track{grid-template-columns:1fr 1fr;gap:40px;}
  .process-track::before{display:none;}
  .why{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .nav-links{display:none;}
  .burger{display:flex;}
}
@media (max-width:600px){
  .container{padding:0 20px;}
  .services-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .footer-top{flex-direction:column;}
}

/* ===== CONTACTO: botones de WhatsApp ===== */
a.contact-card{cursor:pointer;}
a.contact-card:focus-visible{outline:2px solid var(--yellow);outline-offset:3px;}
.contact-card .wa-hint{
  margin-left:auto;flex-shrink:0;color:var(--yellow);font-size:12px;
  letter-spacing:0.06em;text-transform:uppercase;
  display:flex;align-items:center;gap:6px;opacity:0.85;
}
.contact-card .wa-hint svg{width:15px;height:15px;flex-shrink:0;}

/* ===== MODAL: ficha técnica ===== */
.modal-overlay{
  position:fixed;inset:0;z-index:900;
  background:rgba(10,9,8,0.86);
  backdrop-filter:blur(4px);
  display:flex;align-items:center;justify-content:center;
  padding:24px;
  opacity:0;pointer-events:none;
  transition:opacity 0.3s ease;
}
.modal-overlay.open{opacity:1;pointer-events:auto;}
.modal-box{
  background:var(--panel);border:1px solid rgba(245,180,0,0.25);
  max-width:640px;width:100%;max-height:85vh;overflow-y:auto;
  padding:44px;position:relative;
  transform:translateY(18px);transition:transform 0.35s cubic-bezier(.16,1,.3,1);
}
.modal-overlay.open .modal-box{transform:translateY(0);}
.modal-close{
  position:absolute;top:18px;right:18px;
  width:36px;height:36px;border:1px solid var(--steel);
  display:flex;align-items:center;justify-content:center;
  color:var(--white);font-size:18px;line-height:1;
  transition:border-color 0.3s ease,color 0.3s ease;
}
.modal-close:hover{border-color:var(--yellow);color:var(--yellow);}
.modal-num{
  font-family:'Space Mono',monospace;font-size:12px;color:var(--yellow-dim);
  display:block;margin-bottom:18px;
}
.modal-box h3{font-size:26px;margin-bottom:18px;padding-right:40px;}
.modal-box p.modal-desc{color:var(--gray);font-size:15px;line-height:1.75;margin-bottom:26px;}
.modal-section{margin-bottom:22px;}
.modal-section h5{
  font-family:'Space Mono',monospace;font-size:11px;letter-spacing:0.12em;
  text-transform:uppercase;color:var(--yellow);margin-bottom:12px;
}
.modal-list{list-style:none;}
.modal-list li{
  color:var(--white);font-size:14px;line-height:1.6;
  padding:9px 0 9px 20px;position:relative;
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.modal-list li::before{
  content:"▲";position:absolute;left:0;top:9px;color:var(--yellow);font-size:9px;
}
.modal-cta{
  margin-top:30px;display:flex;gap:14px;flex-wrap:wrap;
}
@media (max-width:600px){
  .modal-box{padding:30px 22px;}
}