/* ============================================================
   GRUPO GTC — Sistema de diseño
   Paleta: acero y marino profundo, con acento ámbar de señalización
   Tipografía: Space Grotesk (display) + Inter (texto) + Red Hat Mono (datos)
   ============================================================ */

:root{
  --navy-950:#0A1826;
  --navy-900:#0F2438;
  --navy-800:#15324D;
  --navy-700:#1D4265;
  --steel-600:#4A6178;
  --steel-400:#7C8EA0;
  --steel-200:#C4CDD6;
  --gray-700:#4B5560;
  --gray-500:#707B86;
  --gray-100:#F4F6F8;
  --gray-050:#FAFBFC;
  --line:#DEE3E8;
  --line-dark:#28405C;
  --amber:#C57C2E;
  --amber-dark:#9C6321;
  --white:#FFFFFF;

  --font-display:'Space Grotesk', sans-serif;
  --font-body:'Inter', sans-serif;
  --font-mono:'Red Hat Mono', monospace;

  --container:1240px;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--navy-900);
  background:var(--white);
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{
  font-family:var(--font-display);
  margin:0;
  font-weight:600;
  letter-spacing:-0.01em;
  color:var(--navy-950);
}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.001ms !important; transition-duration:0.001ms !important; scroll-behavior:auto !important;}
}

.wrap{
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}

.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--amber-dark);
  font-weight:500;
}
.eyebrow.on-dark{color:#E4A860;}

.section{padding:104px 0;}
.section-tight{padding:72px 0;}
@media (max-width:820px){
  .section{padding:64px 0;}
  .section-tight{padding:48px 0;}
  .wrap{padding:0 20px;}
}

.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:32px;
  margin-bottom:48px;
  border-bottom:1px solid var(--line);
  padding-bottom:28px;
}
.section-head h2{font-size:clamp(28px,3.4vw,42px);}
.section-head .desc{max-width:420px;color:var(--gray-500);font-size:15.5px;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 26px;
  font-size:14.5px;
  font-weight:600;
  border-radius:2px;
  border:1px solid transparent;
  transition:transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--amber);color:var(--navy-950);}
.btn-primary:hover{background:#D48934;}
.btn-outline-dark{border-color:rgba(255,255,255,0.35);color:var(--white);}
.btn-outline-dark:hover{border-color:#fff;background:rgba(255,255,255,0.08);}
.btn-outline-light{border-color:var(--navy-900);color:var(--navy-900);}
.btn-outline-light:hover{background:var(--navy-900);color:var(--white);}
.btn-text{
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:0.03em;
  border-bottom:1px solid currentColor;
  padding-bottom:2px;
  gap:6px;
}

/* ---------- Nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  padding:22px 0;
  transition:background .25s ease, padding .25s ease, box-shadow .25s ease;
}
.site-header.solid{
  background:rgba(10,24,38,0.94);
  backdrop-filter:blur(6px);
  padding:14px 0;
  box-shadow:0 1px 0 rgba(255,255,255,0.06);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;}
.brand{
  display:flex;
  align-items:center;
  gap:13px;
  color:var(--white);
}
.brand-logo{
  height:46px;
  width:auto;
  border-radius:6px;
  flex-shrink:0;
}
.brand-text{
  font-family:var(--font-display);
  font-weight:700;
  font-size:19px;
  letter-spacing:0.01em;
  color:var(--white);
  display:flex;
  flex-direction:column;
  line-height:1.05;
}
.brand-text span{
  font-family:var(--font-mono);
  font-weight:400;
  font-size:10px;
  letter-spacing:0.12em;
  color:var(--steel-200);
  margin-top:4px;
}
.footer-brand{display:flex;align-items:center;gap:10px;}
.footer-brand img{height:30px;width:auto;border-radius:4px;}
.nav-links{display:flex;gap:34px;align-items:center;}
.nav-links a{
  font-size:13.5px;
  font-weight:500;
  color:#DCE3E9;
  letter-spacing:0.01em;
}
.nav-links a:hover{color:var(--white);}
.nav-cta{
  padding:10px 20px;
  font-size:13px;
}
.nav-toggle{display:none;}
@media (max-width:900px){
  .nav-links{
    position:fixed;inset:0 0 0 30%;
    background:var(--navy-950);
    flex-direction:column;
    justify-content:center;
    align-items:flex-start;
    padding:40px;
    gap:26px;
    transform:translateX(100%);
    transition:transform .3s ease;
  }
  .nav-links.open{transform:translateX(0);}
  .nav-links a{font-size:20px;}
  .nav-toggle{
    display:block;background:none;border:0;color:#fff;z-index:110;
    width:26px;height:20px;position:relative;
  }
  .nav-toggle span{
    position:absolute;left:0;right:0;height:2px;background:#fff;
    transition:transform .25s ease, opacity .25s ease;
  }
  .nav-toggle span:nth-child(1){top:0;}
  .nav-toggle span:nth-child(2){top:9px;}
  .nav-toggle span:nth-child(3){top:18px;}
  .nav-toggle.open span:nth-child(1){transform:translateY(9px) rotate(45deg);}
  .nav-toggle.open span:nth-child(2){opacity:0;}
  .nav-toggle.open span:nth-child(3){transform:translateY(-9px) rotate(-45deg);}
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:flex-end;
  color:var(--white);
  overflow:hidden;
}
.hero-media{position:absolute;inset:0;z-index:0;}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{
  content:"";
  position:absolute;inset:0;
  background:
    linear-gradient(180deg, rgba(9,20,32,0.35) 0%, rgba(9,20,32,0.28) 38%, rgba(8,17,28,0.86) 88%),
    linear-gradient(90deg, rgba(8,17,28,0.55) 0%, rgba(8,17,28,0.05) 46%);
}
.hero-content{position:relative;z-index:1;padding:180px 0 70px;width:100%;}
.hero-content .eyebrow{color:#E4A860;margin-bottom:20px;display:block;}
.hero-content h1{
  font-size:clamp(38px,6vw,74px);
  line-height:1.02;
  max-width:900px;
  color:#fff;
}
.hero-content h1 em{
  font-style:normal;
  color:var(--amber);
}
.hero-content .lead{
  margin-top:24px;
  max-width:520px;
  font-size:17px;
  color:#D3DBE2;
}
.hero-actions{display:flex;gap:16px;margin-top:40px;flex-wrap:wrap;}
.hero-scroll{
  position:absolute;right:32px;bottom:36px;z-index:1;
  font-family:var(--font-mono);
  color:#B9C4CD;
  font-size:11px;
  letter-spacing:0.14em;
  writing-mode:vertical-rl;
  display:flex;align-items:center;gap:10px;
}
.hero-scroll::after{content:"";width:1px;height:46px;background:#B9C4CD;display:block;}
@media (max-width:820px){
  .hero-content{padding:140px 0 50px;}
  .hero-scroll{display:none;}
}

/* ---------- Rating plate (signature element) ---------- */
.plate-strip{
  background:var(--navy-950);
  border-top:1px solid var(--line-dark);
}
.plate-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
}
.plate-cell{
  padding:30px 28px;
  border-right:1px solid var(--line-dark);
  position:relative;
}
.plate-cell:last-child{border-right:none;}
.plate-cell .num{
  font-family:var(--font-mono);
  font-size:clamp(26px,3vw,38px);
  color:#fff;
  font-weight:500;
  display:flex;
  align-items:baseline;
  gap:2px;
}
.plate-cell .num small{font-size:16px;color:var(--amber);font-family:var(--font-mono);}
.plate-cell .label{
  margin-top:8px;
  font-size:12.5px;
  color:var(--steel-200);
  letter-spacing:0.02em;
  max-width:22ch;
}
@media (max-width:820px){
  .plate-grid{grid-template-columns:repeat(2,1fr);}
  .plate-cell{padding:22px 18px;}
  .plate-cell:nth-child(2){border-right:none;}
}

/* ---------- Equipment cards ---------- */
.equip-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.equip-card{
  background:var(--white);
  display:flex;
  flex-direction:column;
  transition:box-shadow .2s ease;
  color:inherit;
  text-decoration:none;
  cursor:pointer;
}
.equip-card:hover{box-shadow:0 18px 40px -22px rgba(15,36,56,0.35);position:relative;z-index:1;}
.equip-photo{
  aspect-ratio:4/3;
  overflow:hidden;
  position:relative;
  background:var(--navy-900);
}
.equip-photo img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.equip-card:hover .equip-photo img{transform:scale(1.045);}
.equip-tag{
  position:absolute;top:14px;left:14px;
  background:rgba(10,24,38,0.82);
  color:#fff;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.06em;
  padding:6px 10px;
}
.equip-body{padding:26px 26px 28px;flex:1;display:flex;flex-direction:column;}
.equip-body h3{font-size:20px;margin-bottom:10px;}
.equip-body p{color:var(--gray-500);font-size:14.5px;flex:1;}
.equip-meta{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-top:20px;
  padding-top:18px;
  border-top:1px solid var(--line);
}
.equip-meta .cap{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--navy-800);
}
.equip-meta .cap b{color:var(--amber-dark);}
.equip-link{
  font-family:var(--font-mono);
  font-size:12.5px;
  color:var(--navy-800);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.equip-card:hover .equip-link{color:var(--amber-dark);}
@media (max-width:980px){.equip-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.equip-grid{grid-template-columns:1fr;}}
.feature-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
  padding:56px 0;
  border-bottom:1px solid var(--line);
}
.feature-row:last-child{border-bottom:none;}
.feature-row.reverse .feature-media{order:2;}
.feature-media{aspect-ratio:5/4;overflow:hidden;}
.feature-media img{width:100%;height:100%;object-fit:cover;}
.feature-text .eyebrow{margin-bottom:14px;display:block;}
.feature-text h3{font-size:clamp(22px,2.6vw,30px);margin-bottom:16px;}
.feature-text p{color:var(--gray-500);font-size:15px;margin-bottom:22px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  font-family:var(--font-mono);
  font-size:12px;
  padding:6px 11px;
  border:1px solid var(--line);
  color:var(--navy-800);
}
.tag-logo{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:9px 16px;
  background:rgba(255,255,255,0.94);
  width:381px;
  max-width:100%;
  box-sizing:border-box;
  font-size:13.5px;
}
.tag-logo img{height:28px;width:auto;display:block;}
@media (max-width:820px){
  .feature-row,.feature-row.reverse{grid-template-columns:1fr;gap:24px;}
  .feature-row.reverse .feature-media{order:0;}
}

/* ---------- Projects list (compact) ---------- */
.proj-list{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0 48px;
}
.proj-list li{
  display:flex;
  justify-content:space-between;
  gap:16px;
  padding:15px 0;
  border-bottom:1px solid var(--line);
  font-size:14.5px;
}
.proj-list li .loc{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--gray-500);
  white-space:nowrap;
}
@media (max-width:700px){.proj-list{grid-template-columns:1fr;}}

/* ---------- Clients ---------- */
.client-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);
  border-left:1px solid var(--line);
}
.client-cell{
  position:relative;
  border-right:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:9px 22px;
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:150px;
  overflow:hidden;
  background:var(--white);
}
.client-cell img{
  max-height:90px;
  max-width:84%;
  width:auto;
  object-fit:contain;
  transition:opacity .25s ease, transform .25s ease;
}
.client-cell:hover img{opacity:0.08;transform:scale(1.03);}
.client-cell .client-name{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:0 14px;
  font-family:var(--font-display);
  font-weight:600;
  font-size:14.5px;
  letter-spacing:0.01em;
  color:var(--navy-950);
  opacity:0;
  transition:opacity .25s ease;
  pointer-events:none;
}
.client-cell:hover .client-name{opacity:1;}
@media (max-width:820px){.client-grid{grid-template-columns:repeat(2,1fr);}}

/* ---------- Timeline ---------- */
.timeline{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:24px;
  position:relative;
}
.timeline::before{
  content:"";
  position:absolute;
  top:14px;left:0;right:0;height:1px;
  background:var(--line-dark);
}
.tl-item{position:relative;padding-top:44px;}
.tl-item::before{
  content:"";
  position:absolute;top:9px;left:0;
  width:11px;height:11px;
  border-radius:50%;
  background:var(--amber);
  border:2px solid var(--navy-950);
}
.tl-year{
  font-family:var(--font-mono);
  color:var(--amber);
  font-size:15px;
  margin-bottom:10px;
  display:block;
}
.tl-item p{color:#C3CDD6;font-size:13.5px;line-height:1.55;}
@media (max-width:900px){
  .timeline{grid-template-columns:1fr;gap:34px;}
  .timeline::before{top:0;bottom:0;left:14px;right:auto;width:1px;height:auto;}
  .tl-item{padding-top:0;padding-left:38px;}
  .tl-item::before{top:6px;left:9px;}
}

/* ---------- Mosaic (variety strip, no captions) ---------- */
.mosaic-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:2px;
  margin-top:44px;
}
.mosaic-grid a, .mosaic-grid .mcell{display:block;overflow:hidden;aspect-ratio:4/3;}
.mosaic-grid img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease, filter .3s ease;filter:saturate(0.94);}
.mosaic-grid .mcell:hover img{transform:scale(1.06);filter:saturate(1.05);}
.mcell.mcell-reveal:hover img{transform:none;object-fit:contain;filter:saturate(1.05);}
@media (max-width:820px){.mosaic-grid{grid-template-columns:repeat(2,1fr);}}

.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:70px;
}
.contact-item{padding:22px 0;border-bottom:1px solid var(--line-dark);}
.contact-item .eyebrow{display:block;margin-bottom:8px;}
.contact-item a,.contact-item p{font-size:17px;color:#fff;font-family:var(--font-display);}
@media (max-width:820px){.contact-grid{grid-template-columns:1fr;gap:8px;}}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--navy-950);
  color:var(--steel-200);
  padding:36px 0;
  border-top:1px solid var(--line-dark);
}
.footer-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:16px;
  font-size:12.5px;
}
.footer-row a{color:var(--steel-200);}
.footer-row a:hover{color:#fff;}
.footer-compliance{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px 18px;
  padding-bottom:18px;
  margin-bottom:18px;
  border-bottom:1px solid var(--line-dark);
}
.repse-badge{
  font-family:var(--font-mono);
  font-size:15.6px;
  font-weight:500;
  color:var(--amber);
  letter-spacing:0.01em;
}
.compliance-note{
  font-size:11.5px;
  color:var(--steel-200);
  opacity:0.7;
}

/* ---------- Dark section base ---------- */
.on-navy{background:var(--navy-950);color:#fff;}
.on-navy h2,.on-navy h3{color:#fff;}

/* ---------- Spec page bits ---------- */
.subhero{
  background:var(--navy-950);
  color:#fff;
  padding:170px 0 60px;
  position:relative;
  overflow:hidden;
}
.subhero .wrap{position:relative;z-index:1;}
.subhero h1{color:#fff;font-size:clamp(32px,4.6vw,52px);max-width:760px;}
.subhero p.lead{color:#C3CDD6;max-width:560px;margin-top:18px;font-size:16px;}
.breadcrumb{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--steel-200);
  margin-bottom:22px;
  display:flex;gap:8px;align-items:center;
}
.breadcrumb a{color:var(--steel-200);}
.breadcrumb a:hover{color:#fff;}

.spec-table-wrap{overflow-x:auto;border:1px solid var(--line);}
table.spec-table{
  width:100%;
  border-collapse:collapse;
  font-size:13.5px;
  min-width:760px;
}
table.spec-table th{
  text-align:left;
  font-family:var(--font-mono);
  font-weight:500;
  font-size:11px;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--steel-600);
  background:var(--gray-100);
  padding:14px 16px;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
table.spec-table td{
  padding:13px 16px;
  border-bottom:1px solid var(--line);
  color:var(--navy-800);
  white-space:nowrap;
}
table.spec-table tr:last-child td{border-bottom:none;}
table.spec-table tr:hover td{background:var(--gray-050);}
.avail{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12px;
}
.avail::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--steel-400);}
.avail.now::before{background:#2E8B57;}
.avail.now{color:#1F6A41;}
.load-link{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--steel-400);
  font-style:italic;
}
a.load-link{
  color:var(--navy-800);
  font-style:normal;
  border-bottom:1px solid var(--steel-200);
  padding-bottom:1px;
}
a.load-link:hover{color:var(--amber-dark);border-color:var(--amber-dark);}

.subcat-block{padding:52px 0;border-bottom:1px solid var(--line);}
.subcat-block:last-of-type{border-bottom:none;}
.subcat-head{display:flex;justify-content:space-between;align-items:baseline;gap:20px;margin-bottom:22px;flex-wrap:wrap;}
.subcat-head h3{font-size:22px;}
.subcat-head .count{font-family:var(--font-mono);font-size:13px;color:var(--gray-500);}

.spec-gallery{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:2px;
  margin-top:12px;
  max-width:820px;
}
.spec-gallery img{aspect-ratio:4/3;object-fit:cover;width:100%;height:100%;}
.spec-gallery .placeholder{
  aspect-ratio:4/3;
  width:100%;
  height:100%;
  background:var(--gray-100);
  border:1px dashed var(--steel-200);
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:14px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:0.06em;
  text-transform:uppercase;
  color:var(--gray-500);
}
@media (max-width:700px){.spec-gallery{grid-template-columns:repeat(2,1fr);}}

.category-nav{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  padding:20px 0 0;
}
.category-nav a{
  font-family:var(--font-mono);
  font-size:12.5px;
  padding:9px 16px;
  border:1px solid var(--line-dark);
  color:#D3DBE2;
}
.category-nav a:hover, .category-nav a.active{background:var(--amber);border-color:var(--amber);color:var(--navy-950);}

.cond-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  margin-top:16px;
}
.cond-cell{background:#fff;padding:13px 20px;font-size:13.5px;line-height:1.5;color:var(--gray-700);}
.cond-cell b{color:var(--navy-950);}
@media (max-width:700px){.cond-grid{grid-template-columns:1fr;}}

.cta-band{
  background:var(--gray-100);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:64px 0;
  text-align:center;
}
.cta-band h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px;}
.cta-band p{color:var(--gray-500);max-width:480px;margin:0 auto 28px;font-size:15px;}
.cta-alt{margin:16px auto 0 !important;font-size:13px !important;color:var(--gray-500);}
.cta-alt a{color:var(--navy-800);text-decoration:underline;}