/* DEMSA — sitio institucional */
:root{
  --ink:#081321; --navy:#0c2038; --navy-2:#123055;
  --brand:#0b4a92; --brand-2:#0f7ec4; --accent:#f0a828;
  --paper:#ffffff; --steel-50:#f5f7fa; --steel-100:#e8edf3; --steel-200:#d3dce6;
  --text:#16202e; --muted:#5c6c7e; --line:rgba(12,32,56,.12);
  --maxw:1200px; --gut:clamp(20px,5vw,64px);
  --sans:"Inter","Helvetica Neue",Arial,system-ui,-apple-system,sans-serif;
  --disp:"Barlow Condensed","Oswald","Arial Narrow",var(--sans);
  --r:4px;
  --shadow:0 1px 2px rgba(8,19,33,.06),0 8px 24px rgba(8,19,33,.08);
  --shadow-lg:0 2px 4px rgba(8,19,33,.08),0 24px 60px rgba(8,19,33,.16);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--text);background:var(--paper);
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{margin:0;font-family:var(--disp);font-weight:600;line-height:1.05;
  letter-spacing:.005em;text-transform:uppercase}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gut)}
.skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:var(--ink);
  padding:12px 18px;z-index:200;font-weight:600}
.skip:focus{left:8px;top:8px}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}

/* ---------------------------------------------------------------- header */
.hdr{position:fixed;inset:0 0 auto 0;z-index:100;transition:background .3s,box-shadow .3s,border-color .3s;
  border-bottom:1px solid transparent}
.hdr-in{display:flex;align-items:center;gap:16px;height:78px;
  max-width:1340px;margin:0 auto;padding-inline:var(--gut)}
.brand{display:flex;align-items:center;flex:0 0 auto;text-decoration:none}
.brand img{height:34px;width:auto;transition:opacity .25s}
.brand .l-dark{display:none}
.nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.nav a{font-family:var(--disp);text-transform:uppercase;font-size:15.5px;letter-spacing:.05em;
  font-weight:500;text-decoration:none;padding:9px 11px;border-radius:var(--r);
  color:rgba(255,255,255,.86);transition:color .2s,background .2s;white-space:nowrap}
.nav a:hover{color:#fff;background:rgba(255,255,255,.1)}
.nav a[aria-current]{color:#fff}
.nav a[aria-current]::after{content:"";display:block;height:2px;background:var(--accent);margin-top:5px}
.lang{margin-left:8px;font-family:var(--disp);font-size:14px;letter-spacing:.09em;font-weight:600;
  text-decoration:none;padding:6px 10px;border:1px solid rgba(255,255,255,.35);border-radius:var(--r);
  color:rgba(255,255,255,.9);transition:.2s}
.lang:hover{background:#fff;color:var(--ink);border-color:#fff}
.burger{display:none;margin-left:auto;background:none;border:1px solid rgba(255,255,255,.4);
  border-radius:var(--r);width:46px;height:42px;cursor:pointer;padding:0}
.burger span{display:block;width:20px;height:2px;background:#fff;margin:4px auto;transition:.25s}

.hdr.solid{background:rgba(255,255,255,.97);border-bottom-color:var(--line);
  box-shadow:0 1px 20px rgba(8,19,33,.07);backdrop-filter:saturate(1.4) blur(8px)}
.hdr.solid .brand .l-light{display:none}
.hdr.solid .brand .l-dark{display:block}
.hdr.solid .nav a{color:var(--navy)}
.hdr.solid .nav a:hover{background:var(--steel-100)}
.hdr.solid .nav a[aria-current]{color:var(--brand)}
.hdr.solid .lang{color:var(--navy);border-color:var(--steel-200)}
.hdr.solid .lang:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
.hdr.solid .burger{border-color:var(--steel-200)}
.hdr.solid .burger span{background:var(--navy)}

/* ---------------------------------------------------------------- hero */
.hero{position:relative;min-height:min(88vh,760px);display:flex;align-items:flex-end;
  color:#fff;overflow:hidden;background:var(--ink)}
.hero.sub{min-height:min(58vh,520px)}
.hero picture,.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero img{opacity:.62}
.hero::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,19,33,.75) 0%,rgba(8,19,33,.25) 38%,rgba(8,19,33,.88) 100%),
             linear-gradient(90deg,rgba(8,19,33,.7) 0%,rgba(8,19,33,0) 62%)}
.hero-in{position:relative;z-index:2;width:100%;max-width:var(--maxw);margin:0 auto;
  padding:150px var(--gut) clamp(52px,7vw,88px)}
.eyebrow{font-family:var(--disp);text-transform:uppercase;letter-spacing:.18em;font-size:14px;
  font-weight:600;color:var(--accent);display:flex;align-items:center;gap:12px;margin-bottom:18px}
.eyebrow::before{content:"";width:38px;height:2px;background:var(--accent);flex:0 0 auto}
.hero h1{font-size:clamp(33px,6.4vw,80px);max-width:22ch;text-wrap:balance;overflow-wrap:break-word}
.hero .sub{margin-top:22px;max-width:56ch;font-size:clamp(17px,1.5vw,20px);color:rgba(255,255,255,.86)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}

.btn{display:inline-flex;align-items:center;gap:10px;font-family:var(--disp);text-transform:uppercase;
  letter-spacing:.09em;font-weight:600;font-size:17px;padding:14px 26px;border-radius:var(--r);
  text-decoration:none;border:1px solid transparent;transition:.2s;cursor:pointer}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{background:#ffbe4d}
.btn-ghost{border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--brand)}
.btn-outline{border-color:var(--steel-200);color:var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
.btn .ar{transition:transform .2s}
.btn:hover .ar{transform:translateX(4px)}

/* ---------------------------------------------------------------- sections */
section{padding:clamp(60px,8vw,104px) 0}
.sec-head{max-width:62ch}
.sec-head h2{font-size:clamp(30px,4vw,50px);text-wrap:balance}
.sec-head .lead{margin-top:18px;font-size:clamp(17px,1.4vw,19.5px);color:var(--muted)}
.alt{background:var(--steel-50)}
.dark{background:var(--navy);color:#fff}
.dark .sec-head .lead{color:rgba(255,255,255,.75)}
.dark a{color:#fff}

.grid{display:grid;gap:clamp(20px,2.4vw,32px)}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.mt{margin-top:clamp(34px,4vw,52px)}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.14)}
.stat{background:var(--navy);padding:30px 26px}
.stat b{display:block;font-family:var(--disp);font-size:clamp(36px,4.4vw,54px);line-height:1;
  color:var(--accent);font-weight:600}
.stat span{display:block;margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.72);line-height:1.45}

/* cards */
.card{position:relative;display:flex;flex-direction:column;justify-content:flex-end;
  min-height:390px;text-decoration:none;color:#fff;overflow:hidden;
  background:var(--ink);border-radius:var(--r);isolation:isolate}
.card picture{position:absolute;inset:0;z-index:0;display:block}
.card img{width:100%;height:100%;object-fit:cover;opacity:.72;
  transition:transform .6s cubic-bezier(.2,.7,.2,1),opacity .3s}
.card::after{content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(8,19,33,.15) 0%,rgba(8,19,33,.35) 42%,rgba(8,19,33,.93) 100%)}
.card:hover img{transform:scale(1.06);opacity:.85}
.card-body{position:relative;z-index:2;padding:26px 24px}
.chip{display:inline-block;font-family:var(--disp);text-transform:uppercase;letter-spacing:.13em;
  font-size:12.5px;font-weight:600;color:var(--accent);margin-bottom:9px}
.card h3{font-size:clamp(20px,1.8vw,25px);text-wrap:balance}
.card p{margin-top:9px;font-size:14.5px;color:rgba(255,255,255,.78);line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card .go{margin-top:14px;font-family:var(--disp);text-transform:uppercase;letter-spacing:.1em;
  font-size:14px;color:#fff;display:inline-flex;gap:8px;align-items:center}

/* feature blocks */
.feat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px 28px;height:100%}
.dark .feat{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.15)}
.feat .n{font-family:var(--disp);font-size:15px;letter-spacing:.14em;color:var(--brand-2);font-weight:600}
.dark .feat .n{color:var(--accent)}
.feat h3{margin-top:12px;font-size:22px}
.feat p{margin-top:12px;font-size:15.5px;color:var(--muted);line-height:1.6}
.dark .feat p{color:rgba(255,255,255,.75)}

/* split */
.split{display:grid;grid-template-columns:1.15fr 1fr;gap:clamp(30px,5vw,72px);align-items:center}
.split img{border-radius:var(--r);aspect-ratio:4/5;object-fit:cover}
.prose h3{font-size:clamp(21px,2vw,27px);margin-top:34px}
.prose h3:first-child{margin-top:0}
.prose p{margin-top:14px;color:var(--text)}
.prose ul{margin:16px 0 0;padding-left:0;list-style:none}
.prose li{position:relative;padding-left:26px;margin-bottom:11px;color:var(--text)}
.prose li::before{content:"";position:absolute;left:0;top:.62em;width:9px;height:2px;background:var(--accent)}

/* timeline */
.tl{position:relative;margin-top:46px;padding-left:0;list-style:none}
.tl::before{content:"";position:absolute;left:74px;top:8px;bottom:8px;width:1px;background:var(--line)}
.dark .tl::before{background:rgba(255,255,255,.2)}
.tl li{position:relative;display:grid;grid-template-columns:74px 1fr;gap:30px;padding-bottom:26px}
.tl b{font-family:var(--disp);font-size:21px;color:var(--brand-2);letter-spacing:.02em;text-align:right;
  padding-right:2px}
.dark .tl b{color:var(--accent)}
.tl li::after{content:"";position:absolute;left:70px;top:11px;width:9px;height:9px;border-radius:50%;
  background:var(--brand-2);border:2px solid #fff}
.dark .tl li::after{background:var(--accent);border-color:var(--navy)}
.tl p{font-size:16px;color:var(--muted)}
.dark .tl p{color:rgba(255,255,255,.78)}

/* meta table */
.meta{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-top:0}
.meta div{background:#fff;padding:20px 22px}
.meta dt{font-family:var(--disp);text-transform:uppercase;letter-spacing:.13em;font-size:12.5px;
  color:var(--muted);margin:0}
.meta dd{margin:7px 0 0;font-weight:600;font-size:16px;line-height:1.4}

/* press */
.press{list-style:none;margin:38px 0 0;padding:0;border-top:1px solid var(--line)}
.press li{border-bottom:1px solid var(--line)}
.press a{display:grid;grid-template-columns:180px 1fr auto;gap:28px;align-items:baseline;
  padding:26px 4px;text-decoration:none;transition:background .2s}
.press a:hover{background:var(--steel-50)}
.press .src{font-family:var(--disp);text-transform:uppercase;letter-spacing:.1em;font-size:14px;
  color:var(--brand-2)}
.press .src em{display:block;font-style:normal;color:var(--muted);letter-spacing:.06em;font-size:13px;margin-top:3px}
.press h3{font-size:20px;text-transform:none;font-family:var(--sans);font-weight:600;line-height:1.35}
.press p{margin-top:7px;font-size:15px;color:var(--muted)}
.press .ext{color:var(--muted);font-size:20px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,60px);align-items:start}
.ccard{border:1px solid var(--line);border-radius:var(--r);padding:32px}
.ccard h3{font-size:20px}
.ccard .mail{display:inline-block;margin-top:14px;font-size:clamp(19px,2.2vw,26px);font-weight:600;
  color:var(--brand);text-decoration:none;word-break:break-word;font-family:var(--disp);letter-spacing:.01em}
.ccard .mail:hover{color:var(--brand-2)}
.ccard p{margin-top:12px;color:var(--muted);font-size:15.5px}

/* cta band */
.band{position:relative;color:#fff;overflow:hidden;background:var(--ink)}
.band img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.35}
.band::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,19,33,.92),rgba(8,19,33,.55))}
.band .wrap{position:relative;z-index:2;padding-block:clamp(56px,7vw,92px)}
.band h2{font-size:clamp(28px,3.6vw,46px);max-width:20ch}
.band p{margin-top:16px;max-width:52ch;color:rgba(255,255,255,.82)}

/* footer */
.ftr{background:var(--ink);color:rgba(255,255,255,.72);padding:clamp(52px,6vw,76px) 0 30px;font-size:15px}
.ftr-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:clamp(28px,4vw,56px)}
.ftr img{height:38px;width:auto}
.ftr h4{font-size:15px;letter-spacing:.14em;color:#fff;margin-bottom:16px}
.ftr ul{list-style:none;margin:0;padding:0}
.ftr li{margin-bottom:9px}
.ftr a{color:rgba(255,255,255,.72);text-decoration:none;transition:color .2s}
.ftr a:hover{color:var(--accent)}
.ftr .tag{margin-top:20px;max-width:38ch;color:rgba(255,255,255,.6)}
.ftr-bot{margin-top:46px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13.5px;color:rgba(255,255,255,.5)}


/* franja de logos de socios */
.logos{list-style:none;margin:clamp(30px,4vw,46px) 0 0;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:clamp(28px,3.4vw,50px) clamp(34px,4.6vw,66px);
  padding:clamp(34px,4vw,52px) clamp(26px,3vw,44px);
  background:#fff;border:1px solid var(--line);border-radius:var(--r)}
.logos li{display:flex;align-items:center;justify-content:center}
.logos img{max-height:54px;max-width:168px;width:auto;height:auto;object-fit:contain;
  filter:grayscale(1) opacity(.6);transition:filter .25s}
.logos li:hover img{filter:none}

/* figura dentro de una ficha de proyecto */
.fig{margin:34px 0 0;padding:0}
.fig img{width:100%;height:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--steel-50)}
.fig figcaption{margin-top:12px;font-size:14.5px;color:var(--muted);line-height:1.5}

/* ---------------------------------------------------------------- responsive */
@media (max-width:1024px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .card{min-height:330px}
  .g3{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .meta{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr}
  .split img{aspect-ratio:16/9;max-height:420px;width:100%}
  .press a{grid-template-columns:1fr;gap:10px}
  .logos img{max-height:42px;max-width:130px}
  .contact-grid{grid-template-columns:1fr}
  .ftr-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:1400px){
  .hdr-in{padding-inline:28px}
  .brand img{height:31px}
}
@media (max-width:1180px){
  .burger{display:block}
  .nav{position:fixed;inset:78px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    background:var(--navy);padding:10px var(--gut) 22px;transform:translateY(-140%);
    transition:transform .32s cubic-bezier(.2,.8,.2,1);box-shadow:var(--shadow-lg);margin:0}
  .nav.open{transform:none}
  .nav a{color:#fff;padding:14px 4px;font-size:19px;letter-spacing:.06em;
    border-bottom:1px solid rgba(255,255,255,.1)}
  .hdr.solid .nav a{color:#fff}
  .nav a:hover{background:transparent}
  .nav a[aria-current]::after{display:none}
  .nav a[aria-current]{color:var(--accent)}
  .lang{margin:16px 0 0;align-self:flex-start;color:#fff;border-color:rgba(255,255,255,.4);
    font-size:15px;padding:7px 12px}
  .hdr.solid .lang{color:#fff;border-color:rgba(255,255,255,.4)}
}
@media (max-width:820px){
  body{font-size:16.5px}
  .card{min-height:300px}
  .eyebrow{flex-wrap:wrap}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .ftr-grid{grid-template-columns:1fr}
  .hero-in{padding-top:124px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}