:root{
  --ink:#14202b;
  --blue:#2c5f7c;
  --grid:#3a7ca5;
  --paper:#edeae3;
  --paper-2:#e2ddd2;
  --signal:#e8862b;
  --steel:#6b7280;
  --white:#f7f5f0;
  --line: rgba(58,124,165,.35);
  --display: 'Archivo', sans-serif;
  --body: 'Inter', sans-serif;
  --mono: 'IBM Plex Mono', monospace;
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--body); background:var(--paper); color:var(--ink); line-height:1.5;}
img{max-width:100%; display:block;}
a{color:inherit;}
.wrap{max-width:1180px; margin:0 auto; padding:0 28px;}
.blueprint-bg{
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 42px 42px;
}

/* ---------- header / nav ---------- */
header{position:sticky; top:0; z-index:50; background:rgba(20,32,43,.97); backdrop-filter:blur(6px); border-bottom:1px solid rgba(58,124,165,.4);}
.nav-inner{display:flex; align-items:center; justify-content:space-between; padding:16px 28px; max-width:1180px; margin:0 auto;}
.brand{font-family:var(--display); font-weight:800; letter-spacing:.02em; color:var(--white); font-size:16px; text-decoration:none; display:flex; align-items:center; gap:10px;}
.brand small{display:block; font-family:var(--mono); font-weight:400; font-size:10px; letter-spacing:.14em; color:var(--grid); text-transform:uppercase; margin-top:2px;}
.brand-mark{width:30px; height:30px; flex-shrink:0; object-fit:contain;}
nav.menu{display:flex; gap:2px; align-items:center;}
nav.menu a{font-family:var(--mono); font-size:12px; letter-spacing:.05em; text-transform:uppercase; color:var(--paper-2); text-decoration:none; padding:10px 14px; border-radius:2px; position:relative;}
nav.menu a::before{content:attr(data-num); color:var(--grid); margin-right:6px; font-size:10px;}
nav.menu a:hover, nav.menu a.active{color:var(--signal);}
.lang-toggle{display:flex; font-family:var(--mono); font-size:11px; border:1px solid var(--grid); border-radius:3px; overflow:hidden; margin-left:18px; flex-shrink:0;}
.lang-toggle button{background:transparent; color:var(--paper-2); border:none; padding:7px 10px; cursor:pointer; letter-spacing:.06em;}
.lang-toggle button.active{background:var(--grid); color:var(--ink); font-weight:600;}
.menu-toggle{display:none; background:none; border:none; color:var(--white); font-size:22px; cursor:pointer;}
@media (max-width:960px){
  nav.menu{position:fixed; inset:64px 0 0 0; background:var(--ink); flex-direction:column; align-items:flex-start; padding:20px 28px; gap:4px; display:none;}
  nav.menu.open{display:flex;}
  nav.menu a{width:100%; padding:14px 0; border-bottom:1px solid rgba(255,255,255,.08);}
  .menu-toggle{display:block;}
  .lang-toggle{margin-left:auto;}
}

/* ---------- back bar ---------- */
.back-bar{background:var(--paper-2); border-bottom:1px solid var(--line);}
.back-bar .wrap{padding-top:12px; padding-bottom:12px;}
.back-link{
  font-family:var(--mono); font-size:12px; text-transform:uppercase; letter-spacing:.05em;
  text-decoration:none; color:var(--blue); display:inline-flex; align-items:center; gap:6px;
}
.back-link:hover{color:var(--signal);}

/* ---------- hero (home) ---------- */
.hero{background:var(--ink); color:var(--white); position:relative; overflow:hidden; padding:64px 0;}
.hero .wrap{display:grid; grid-template-columns:1.1fr .9fr; gap:48px; align-items:center;}
@media (max-width:900px){ .hero .wrap{grid-template-columns:1fr;} }
.eyebrow{font-family:var(--mono); font-size:12px; letter-spacing:.18em; text-transform:uppercase; color:var(--grid); margin-bottom:18px; display:flex; align-items:center; gap:10px;}
.eyebrow::before{content:''; width:26px; height:1px; background:var(--grid);}
h1{font-family:var(--display); font-weight:800; font-size:clamp(32px,4.2vw,50px); line-height:1.06; letter-spacing:-.01em; margin-bottom:20px;}
h1 em{font-style:normal; color:var(--signal);}
.lede{font-size:17px; color:#c9d2d8; max-width:52ch; margin-bottom:28px;}
.cta-row{display:flex; gap:14px; flex-wrap:wrap;}
.btn{font-family:var(--mono); font-size:12px; letter-spacing:.06em; text-transform:uppercase; text-decoration:none; padding:13px 22px; border-radius:2px; display:inline-block; border:none; cursor:pointer;}
.btn-primary{background:var(--signal); color:var(--ink); font-weight:600;}
.btn-ghost{border:1px solid rgba(255,255,255,.35); color:var(--white); background:transparent;}
.btn-ghost:hover{border-color:var(--signal); color:var(--signal);}
.beam-figure svg{width:100%; height:auto;}
.beam-figure .cap{font-family:var(--mono); font-size:10.5px; color:var(--grid); text-transform:uppercase; letter-spacing:.1em; margin-top:10px; text-align:center;}

/* ---------- page header (subpages) ---------- */
.page-hero{background:var(--ink); color:var(--white); padding:52px 0;}
.page-hero .eyebrow{margin-bottom:14px;}
.page-hero h1{font-size:clamp(28px,3.6vw,42px); margin-bottom:14px;}
.page-hero .lede{margin-bottom:0;}

/* ---------- section shell ---------- */
section{padding:70px 0;}
.section-head{margin-bottom:40px; max-width:640px;}
.section-num{font-family:var(--mono); font-size:12px; color:var(--blue); letter-spacing:.12em; display:block; margin-bottom:10px;}
h2{font-family:var(--display); font-weight:800; font-size:clamp(24px,2.8vw,34px); letter-spacing:-.01em;}
h3{font-family:var(--display); font-weight:700;}
.section-desc{color:var(--steel); margin-top:14px; font-size:15.5px; max-width:56ch;}

/* ---------- link cards (home + ayuda hub) ---------- */
.card-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:2px; background:var(--line); border:1px solid var(--line);}
.card-grid.cols-4{grid-template-columns:repeat(4,1fr);}
.card-grid.cols-5{grid-template-columns:repeat(5,1fr);}
@media (max-width:960px){ .card-grid.cols-5{grid-template-columns:repeat(3,1fr);} }
@media (max-width:860px){ .card-grid, .card-grid.cols-4{grid-template-columns:1fr;} .card-grid.cols-5{grid-template-columns:1fr 1fr;} }
@media (max-width:560px){ .card-grid.cols-5{grid-template-columns:1fr;} }
.link-card{background:var(--paper); padding:30px 26px; text-decoration:none; color:var(--ink); display:block; transition:background .15s;}
.link-card:hover{background:var(--white);}
.link-card .tag{font-family:var(--mono); font-size:11px; color:var(--blue); letter-spacing:.1em; text-transform:uppercase; margin-bottom:14px; display:block;}
.link-card h3{font-size:19px; margin-bottom:10px;}
.link-card p{color:var(--steel); font-size:14px; margin-bottom:14px;}
.link-card .go{font-family:var(--mono); font-size:11.5px; color:var(--signal); text-transform:uppercase; letter-spacing:.05em;}

/* ---------- image slots ---------- */
.img-slot{
  border:1.5px dashed var(--grid); border-radius:2px; display:flex; align-items:center; justify-content:center;
  text-align:center; padding:20px;
  background:repeating-linear-gradient(45deg, transparent, transparent 8px, rgba(58,124,165,.07) 8px, rgba(58,124,165,.07) 16px);
}
.img-slot span{font-family:var(--mono); font-size:11.5px; color:var(--blue); line-height:1.7;}
.img-slot.filled{border:none; padding:0; background:none; overflow:hidden; border-radius:4px;}
.img-slot.filled img{width:100%; height:100%; object-fit:cover; display:block; border-radius:4px;}
.img-slot.ratio-4-3{aspect-ratio:4/3;}
.img-slot.ratio-5-4{aspect-ratio:5/4;}
.img-slot.ratio-16-9{aspect-ratio:16/9;}
.img-slot.diagram{border:1px solid var(--paper-2); background:var(--white); padding:10px;}
.img-slot.diagram img{width:100%; height:auto; object-fit:contain;}

/* ---------- service page layout ---------- */
.service-layout{display:grid; grid-template-columns:1fr 1fr; gap:50px; align-items:start;}
@media (max-width:900px){ .service-layout{grid-template-columns:1fr;} }
.service-layout ul{list-style:none; margin-top:20px;}
.service-layout ul li{padding:10px 0; border-top:1px solid var(--line); font-size:14.5px; display:flex; gap:8px;}
.service-layout ul li::before{content:'—'; color:var(--signal);}
.gallery{display:grid; grid-template-columns:repeat(2,1fr); gap:16px; margin-top:16px;}
.gallery.cols-4{grid-template-columns:repeat(4,1fr);}
@media (max-width:900px){ .gallery.cols-4{grid-template-columns:repeat(3,1fr);} }
@media (max-width:700px){ .gallery.cols-4{grid-template-columns:repeat(2,1fr);} }
@media (max-width:600px){ .gallery{grid-template-columns:1fr;} .gallery.cols-4{grid-template-columns:1fr;} }

/* ---------- about / stats ---------- */
.stat-row{display:flex; gap:30px; margin-top:26px; flex-wrap:wrap;}
.stat b{font-family:var(--display); font-size:26px; display:block;}
.stat span{font-family:var(--mono); font-size:11px; color:var(--steel); text-transform:uppercase; letter-spacing:.05em;}

/* ---------- ayuda / element pages ---------- */
.help-topbar{background:var(--ink); color:var(--white);}
.element-nav{display:flex; gap:8px; flex-wrap:wrap; padding:18px 0 0;}
.element-nav a{
  font-family:var(--mono); font-size:11.5px; text-transform:uppercase; letter-spacing:.04em;
  color:var(--paper-2); text-decoration:none; padding:9px 14px; border:1px solid rgba(255,255,255,.15); border-radius:2px;
}
.element-nav a:hover, .element-nav a.active{background:var(--grid); color:var(--ink); border-color:var(--grid);}
.element-detail{display:grid; grid-template-columns:1fr 1fr; gap:50px; align-items:start;}
@media (max-width:900px){ .element-detail{grid-template-columns:1fr;} }
.formula-box{
  font-family:var(--mono); font-size:13px; background:var(--paper-2); border-left:3px solid var(--signal);
  padding:14px 16px; margin:18px 0; border-radius:2px; line-height:1.8;
}

/* ---------- calculator ---------- */
.calc-panel{background:var(--paper); color:var(--ink); border-radius:4px; padding:28px 26px; border:1px solid var(--paper-2);}
.calc-panel.on-dark{background:var(--white);}
.calc-panel h3{font-size:18px; margin-bottom:4px;}
.calc-sub{font-family:var(--mono); font-size:11.5px; color:var(--blue); margin-bottom:20px; text-transform:uppercase; letter-spacing:.06em;}
.calc-row{display:grid; grid-template-columns:1fr 1fr; gap:14px; margin-bottom:14px;}
.field{display:flex; flex-direction:column; gap:6px;}
.field label{font-family:var(--mono); font-size:11px; color:var(--steel); text-transform:uppercase; letter-spacing:.04em;}
.field input, .field select{font-family:var(--mono); font-size:14px; padding:9px 10px; border:1px solid var(--paper-2); border-radius:2px; background:var(--white); color:var(--ink);}
.field input:focus, .field select:focus{outline:2px solid var(--signal); outline-offset:1px;}
.load-toggle{display:flex; gap:8px; margin-bottom:18px;}
.load-toggle button{flex:1; font-family:var(--mono); font-size:11.5px; padding:9px; border:1px solid var(--paper-2); background:var(--white); cursor:pointer; text-transform:uppercase; letter-spacing:.04em; border-radius:2px;}
.load-toggle button.active{background:var(--blue); color:var(--white); border-color:var(--blue);}
.calc-results{margin-top:18px; padding-top:18px; border-top:1px dashed var(--paper-2); display:grid; grid-template-columns:1fr 1fr; gap:14px;}
@media (max-width:480px){ .calc-results{grid-template-columns:1fr !important;} }
.result{background:var(--white); border:1px solid var(--paper-2); border-radius:2px; padding:12px 14px;}
.result .rlabel{font-family:var(--mono); font-size:10.5px; color:var(--steel); text-transform:uppercase; letter-spacing:.05em;}
.result .rval{font-family:var(--mono); font-size:20px; font-weight:600; color:var(--ink); margin-top:4px;}
.result .rval span{font-size:12px; color:var(--blue); font-weight:400;}
.calc-note{font-size:11.5px; color:var(--steel); margin-top:16px; line-height:1.5;}
.memoria-box{margin-top:18px; padding-top:16px; border-top:1px dashed var(--paper-2);}
.memoria-label{font-family:var(--mono); font-size:10.5px; color:var(--steel); text-transform:uppercase; letter-spacing:.05em; margin-bottom:8px;}
.memoria-box pre{font-family:var(--mono); font-size:12px; line-height:1.8; color:var(--ink); white-space:pre-wrap; word-break:break-word; background:var(--white); border:1px solid var(--paper-2); border-radius:2px; padding:14px 16px; margin:0;}
.check-pass{color:#2c7a4b; font-weight:600;}
.check-fail{color:#c0392b; font-weight:600;}
.field select.wide{grid-column:1/-1;}

/* ---------- photo band ---------- */
.photo-band{position:relative; height:380px; overflow:hidden;}
.photo-band img{width:100%; height:100%; object-fit:cover; display:block;}
.photo-band .band-caption{
  position:absolute; left:0; right:0; bottom:0; padding:22px 28px;
  background:linear-gradient(to top, rgba(20,32,43,.88), rgba(20,32,43,0));
  color:var(--white);
}
.photo-band .band-caption span{font-family:var(--mono); font-size:11px; color:var(--grid); text-transform:uppercase; letter-spacing:.08em; display:block; margin-bottom:4px;}
.photo-band .band-caption p{font-family:var(--display); font-weight:700; font-size:18px; max-width:520px;}
@media (max-width:700px){ .photo-band{height:260px;} .photo-band .band-caption p{font-size:15px;} }

/* ---------- certifications ---------- */
.cert-group{margin-bottom:34px;}
.cert-group:last-child{margin-bottom:0;}
.cert-group-label{font-family:var(--mono); font-size:11px; color:var(--blue); text-transform:uppercase; letter-spacing:.08em; margin-bottom:14px; display:block;}
.cert-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:12px;}
@media (max-width:860px){ .cert-grid{grid-template-columns:1fr 1fr;} }
@media (max-width:560px){ .cert-grid{grid-template-columns:1fr;} }
.cert-card{background:var(--white); border:1px solid var(--paper-2); border-left:3px solid var(--grid); border-radius:2px; padding:14px 16px;}
.cert-card .cert-issuer{font-family:var(--mono); font-size:10.5px; color:var(--signal); text-transform:uppercase; letter-spacing:.06em; display:block; margin-bottom:6px;}
.cert-card .cert-title{font-size:13.5px; line-height:1.4; color:var(--ink);}
.cert-card .cert-year{font-family:var(--mono); font-size:10.5px; color:var(--steel); display:block; margin-top:6px;}
.contact{background:var(--ink); color:var(--white);}
.contact .wrap{display:grid; grid-template-columns:1fr 1fr; gap:50px;}
@media (max-width:900px){ .contact .wrap{grid-template-columns:1fr;} }
.contact-info dl{display:flex; flex-direction:column; gap:18px; margin-top:24px;}
.contact-info dt{font-family:var(--mono); font-size:11px; color:var(--grid); text-transform:uppercase; letter-spacing:.08em;}
.contact-info dd{font-size:15px; margin-top:4px;}
.contact form{display:flex; flex-direction:column; gap:14px;}
.contact form input, .contact form textarea, .contact form select{
  font-family:var(--body); background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.18);
  color:var(--white); padding:12px 14px; border-radius:2px; font-size:14px;
}
.contact form select option{
  color:var(--ink); background:var(--white);
}
.contact form label{font-family:var(--mono); font-size:11px; color:#aebac2; text-transform:uppercase; letter-spacing:.05em; margin-bottom:6px; display:block;}
.contact form textarea{min-height:110px; resize:vertical;}
.contact form button{font-family:var(--mono); text-transform:uppercase; letter-spacing:.06em; font-size:12.5px; background:var(--signal); color:var(--ink); border:none; padding:13px; border-radius:2px; cursor:pointer; font-weight:600;}

footer{background:var(--ink); border-top:1px solid rgba(255,255,255,.08); padding:26px 0;}
footer .wrap{display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;}
footer p{font-family:var(--mono); font-size:11px; color:#7c8790; letter-spacing:.03em;}