:root{
  --navy-950:#041525;
  --navy-900:#061E36;
  --navy-850:#082B4F;
  --navy-800:#0B3D66;
  --blue-600:#176B91;
  --nav-blue:#223C6A;
  --gold-400:#F5B82E;
  --gold-300:#FFD262;
  --gold-700:#785000;
  --ink:#1B2633;
  --muted:#526171;
  --white:#FFFFFF;
  --soft:#F5F8FB;
  --soft-blue:#EAF2F7;
  --border:#D2DCE6;
  --max:1180px;
  --header-max:1500px;
  --radius:18px;
  --shadow:0 14px 34px rgba(4,21,37,.11);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);background:var(--white);
  font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  line-height:1.62;
}
img{max-width:100%;height:auto}
a{color:var(--navy-800)}
a:hover{text-decoration-thickness:2px;text-underline-offset:3px}
button,input,select,textarea{font:inherit}
:focus-visible{outline:3px solid var(--gold-400);outline-offset:4px;border-radius:6px}
.skip-link{
  position:absolute;left:1rem;top:-6rem;z-index:9999;background:#fff;color:var(--navy-950);
  border:3px solid var(--navy-950);padding:.8rem 1rem;text-decoration:none;font-weight:900
}
.skip-link:focus{top:1rem}

/* Header: franja institucional + navegación */
.site-header{position:relative;z-index:1000;box-shadow:none}
.institutional-bar{background:#fff;color:var(--navy-900);border-top:2px solid var(--gold-400)}
.institutional-inner{width:min(var(--header-max),calc(100% - 2rem));min-height:96px;margin:auto;display:grid;grid-template-columns:minmax(330px,.95fr) minmax(500px,1.25fr) auto;align-items:center;gap:1.35rem;padding:.45rem 0}
.event-brand{display:flex;align-items:center;gap:.75rem;color:var(--navy-900);text-decoration:none;min-width:0}
.event-emblem{width:70px;height:70px;object-fit:contain;filter:drop-shadow(0 7px 12px rgba(4,21,37,.15))}
.event-brand-copy{min-width:0;line-height:1.08}.event-brand-copy strong{display:block;color:var(--navy-900);font-size:1rem;font-weight:900}.event-brand-copy span{display:block;margin-top:.35rem;color:var(--gold-700);font-size:.78rem;font-weight:800}
.partner-lockup{display:flex;align-items:center;justify-content:center;gap:.8rem;min-width:0}.partner-logo{display:flex;align-items:center;justify-content:center;padding:.2rem;min-height:58px;background:transparent;border:0;box-shadow:none}.partner-logo img{width:205px;max-height:58px;object-fit:contain}.partner-logo.uta img{width:205px}.partner-collab{color:var(--navy-850);font-size:.76rem;font-weight:900;text-align:center;white-space:nowrap}
.lang-switcher{display:flex;align-items:center;justify-content:flex-end;gap:.38rem;white-space:nowrap}.lang-switcher a{display:inline-flex;align-items:center;gap:.28rem;color:var(--navy-850);text-decoration:none;border:1.5px solid var(--nav-blue);border-radius:10px;padding:.52rem .65rem;font-weight:850;font-size:.82rem;background:#fff}.lang-switcher a:hover{background:var(--soft-blue)}.lang-switcher a[aria-current="true"]{background:var(--gold-400);border-color:var(--gold-400);color:var(--navy-950)}.lang-code{font-weight:950}.lang-name{font-weight:700}
.nav-bar{position:sticky;top:0;z-index:1300;background:var(--nav-blue);border-bottom:1px solid rgba(255,255,255,.25);box-shadow:0 4px 14px rgba(4,21,37,.12)}.nav-inner{width:min(var(--header-max),calc(100% - 2rem));min-height:62px;margin:auto;display:flex;align-items:center;justify-content:center;position:relative}.menu-toggle{display:none;margin-left:auto;color:var(--navy-850);background:#fff;border:2px solid #fff;border-radius:10px;padding:.58rem .88rem;font-weight:900}.nav{width:100%}.nav>ul{list-style:none;display:flex;align-items:center;justify-content:center;gap:.18rem;padding:0;margin:0}.nav li{position:relative;list-style:none}.nav a{display:block;color:#fff;text-decoration:none;padding:.72rem .82rem;border-radius:10px;font-weight:850;white-space:nowrap;font-size:.95rem}.nav a:hover,.nav li:focus-within>.nav-parent>a{background:rgba(255,255,255,.14);color:#fff}.nav a[aria-current="page"]{background:var(--gold-400);color:var(--navy-950)}
.nav-parent{display:flex;align-items:center}.submenu-toggle{border:0;background:transparent;color:#fff;font-weight:900;padding:.25rem .32rem;cursor:pointer}.has-submenu:focus-within>.submenu,.has-submenu:hover>.submenu,.has-submenu.submenu-open>.submenu{display:block}.submenu{display:none;position:absolute;left:0;top:100%;min-width:270px;margin:0;padding:.45rem;background:#fff;border:1px solid var(--border);border-radius:0 0 12px 12px;box-shadow:0 14px 28px rgba(4,21,37,.18);z-index:1200}.submenu a{color:var(--navy-850);border-radius:8px;padding:.66rem .75rem;font-size:.9rem}.submenu a:hover,.submenu a[aria-current="page"]{background:var(--soft-blue);color:var(--navy-950)}
/* Hero */
.hero{
  position:relative;color:#fff;
  background:
   linear-gradient(90deg,rgba(4,21,37,.84) 0%,rgba(6,30,54,.78) 38%,rgba(8,43,79,.72) 66%,rgba(4,21,37,.82) 100%),
   url("../images/udec-campus-02-vista.jpg") center 42%/cover no-repeat;
}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.18));pointer-events:none}
.hero-inner{
  width:min(var(--max),calc(100% - 2rem));min-height:590px;margin:auto;padding:3.4rem 0;
  position:relative;z-index:1;display:grid;grid-template-columns:290px 1fr;gap:3rem;align-items:center
}
.hero-emblem{width:280px;filter:drop-shadow(0 16px 30px rgba(0,0,0,.35))}
.hero-copy{max-width:780px}
.hero-kicker{display:inline-block;margin:0 0 .75rem;color:var(--gold-300);text-transform:uppercase;letter-spacing:.105em;font-size:.84rem;font-weight:900}
.hero h1{
  margin:0;color:#fff;font-family:Georgia,"Times New Roman",serif;
  font-size:clamp(2.65rem,5vw,4.65rem);line-height:1.02;letter-spacing:-.022em;text-shadow:0 3px 14px rgba(0,0,0,.55)
}
.hero .subtitle{margin:.9rem 0 1rem;color:var(--gold-300);font-family:Georgia,"Times New Roman",serif;font-size:clamp(1.35rem,2.3vw,2rem);font-weight:800;text-shadow:0 2px 8px rgba(0,0,0,.42)}
.hero-meta{display:flex;flex-wrap:wrap;gap:.45rem 1rem;color:#fff;font-size:1.09rem}
.hero-meta strong{color:#fff}
.hero-actions{max-width:760px;margin-top:1.6rem;display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.action-stack{display:grid;gap:.7rem}
.hero-extra-actions{
  max-width:760px;margin-top:.8rem;display:grid;grid-template-columns:1fr 1fr;gap:.8rem
}
.btn{
  display:inline-flex;justify-content:center;align-items:center;text-align:center;min-height:50px;
  padding:.76rem 1rem;border:2px solid transparent;border-radius:10px;text-decoration:none;font-weight:900
}
.btn-primary{color:var(--navy-950);background:var(--gold-400)}
.btn-primary:hover{background:var(--gold-300);color:var(--navy-950)}
.btn-outline{color:#fff;border-color:var(--gold-400);background:rgba(4,21,37,.62)}
.btn-outline:hover{color:#fff;background:rgba(255,255,255,.09)}
.btn-secondary{color:var(--navy-950);background:#FFF3C7;border-color:var(--gold-400)}
.btn-secondary:hover{background:var(--gold-300)}
.btn-small{min-height:42px;padding:.5rem .72rem;font-size:.9rem}

/* Institutions */
.institutions{background:#fff;border-bottom:1px solid var(--border);box-shadow:0 9px 22px rgba(4,21,37,.06)}
.institutions-inner{width:min(var(--max),calc(100% - 2rem));margin:auto;padding:1.45rem 0 1.5rem}
.institutions-title{margin:0 0 1rem;text-align:center;color:var(--navy-850);text-transform:uppercase;letter-spacing:.09em;font-weight:900;font-size:.82rem}
.institution-grid{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:1.4rem}
.institution-card{display:flex;align-items:center;justify-content:center;min-height:108px;padding:.75rem 1rem;border:1px solid var(--border);border-radius:14px;background:#fff}
.institution-card img{width:min(100%,390px);max-height:82px;object-fit:contain}
.collab-label{color:var(--navy-850);font-weight:850;text-align:center}

/* Compact institutional strip only for El Congreso */
.institutions.compact .institutions-inner{padding:.72rem 0 .78rem}
.institutions.compact .institutions-title{margin-bottom:.48rem;font-size:.74rem}
.institutions.compact .institution-grid{grid-template-columns:minmax(250px,360px) auto minmax(250px,360px);justify-content:center;gap:.65rem}
.institutions.compact .institution-card{min-height:70px;padding:.4rem .7rem}
.institutions.compact .institution-card img{max-height:52px;width:min(100%,300px)}
.institutions.compact .collab-label{font-size:.84rem}

/* Facts */
.fact-strip{background:#fff;border-bottom:1px solid var(--border)}
.fact-grid{width:min(var(--max),calc(100% - 2rem));margin:auto;display:grid;grid-template-columns:repeat(4,1fr)}
.fact{padding:1.35rem 1.2rem;border-right:1px solid var(--border)}
.fact:last-child{border-right:0}
.fact-label{display:block;color:var(--navy-850);text-transform:uppercase;letter-spacing:.06em;font-weight:900;font-size:.8rem}
.fact-value{display:block;margin:.35rem 0 .75rem}

/* General */
main section{padding:4.6rem 1rem}
.container{width:min(var(--max),calc(100% - 2rem));margin:auto}
.narrow{max-width:900px}
.section-kicker{margin:0 0 .35rem;color:var(--gold-700);text-transform:uppercase;letter-spacing:.10em;font-size:.79rem;font-weight:900}
h1,h2,h3{color:var(--navy-850);line-height:1.16}
h2{margin:.15rem 0 1rem;font-size:clamp(1.9rem,3.3vw,2.65rem)}
h3{margin:.2rem 0 .65rem}
.lead{max-width:860px;color:#344454;font-size:1.16rem}
.soft{background:var(--soft)}
.page-hero{color:#fff;background:linear-gradient(110deg,rgba(4,21,37,.88),rgba(11,61,102,.72)),url("../images/udec-campus-02-vista.jpg") center 44%/cover no-repeat;padding:3.5rem 1rem}
.page-hero h1{color:#fff;margin:0;font-family:Georgia,"Times New Roman",serif;font-size:clamp(2.3rem,4.5vw,3.75rem)}
.page-hero p{max-width:820px;font-size:1.08rem}
.breadcrumb{margin-bottom:.7rem;color:#D8E4ED;font-size:.9rem}
.breadcrumb a{color:#fff}

/* Home */
.home-welcome{display:grid;grid-template-columns:1.3fr .7fr;gap:2rem;align-items:start}
.callout{color:#fff;background:var(--navy-850);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem}
.callout h2,.callout h3{color:#fff}
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:1.4rem}
.quick-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.3rem;box-shadow:0 8px 20px rgba(4,21,37,.05)}
.quick-card .num{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:50%;color:#fff;background:var(--navy-850);font-weight:900}
.quick-card p{color:#4A5867}
.quick-card a{font-weight:900}

/* Boxes */
.notice{padding:1rem 1.2rem;border-left:6px solid var(--gold-400);border-radius:9px;color:#3E3827;background:#FFF6D9}
.info-box{padding:1rem 1.2rem;border:1px solid #BED0DE;border-radius:10px;background:#EEF5F9}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1.3rem}
.info-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:1.35rem}
.info-card .tag{display:inline-block;margin-bottom:.65rem;padding:.25rem .6rem;color:var(--navy-850);background:var(--soft-blue);border-radius:999px;font-size:.79rem;font-weight:850}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:1.35rem}
details{margin:.8rem 0;overflow:hidden;background:#fff;border:1px solid var(--border);border-radius:12px}
summary{cursor:pointer;padding:1rem 1.1rem;color:var(--navy-850);background:#F8FAFC;font-weight:900}
details[open] summary{border-bottom:1px solid var(--border)}
.details-body{padding:1rem 1.2rem}
.table-wrap{overflow-x:auto}
table{width:100%;min-width:620px;border-collapse:collapse}
th,td{padding:.85rem;text-align:left;vertical-align:top;border-bottom:1px solid var(--border)}
th{color:var(--navy-850);background:#EAF2F7}
caption{margin-bottom:.6rem;text-align:left;color:var(--navy-850);font-weight:900}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:1.2rem}
.milestone{padding:1.1rem;border:1px solid var(--border);border-top:5px solid var(--gold-400);border-radius:14px;background:#fff}
.milestone time{display:block;margin-bottom:.35rem;color:var(--navy-850);font-weight:900}
.highlight-important{margin-top:1rem;padding:.85rem 1rem;border-radius:10px;background:#FFF3C7;border:2px solid var(--gold-400);font-weight:900;color:var(--navy-950)}

/* Committees */
.committee-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1.2rem}
.committee-grid.four{grid-template-columns:repeat(4,1fr)}
.person-card{padding:1.15rem;background:#fff;border:1px solid var(--border);border-radius:14px}
.person-card::before{content:"";display:block;width:44px;height:5px;margin-bottom:.85rem;border-radius:999px;background:var(--gold-400)}
.person-card h3{margin:0 0 .35rem;font-size:1.05rem}
.person-card p{margin:.15rem 0;color:#526171;font-size:.92rem}

/* Galleries */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1.4rem}
.gallery.gallery-four{grid-template-columns:repeat(4,1fr)}
.gallery figure{margin:0;overflow:hidden;background:#fff;border:1px solid var(--border);border-radius:14px}
.gallery img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.gallery figcaption{padding:.75rem .9rem;color:#405061;font-size:.9rem}
.gallery-subsection{margin-top:3.3rem}
.gallery-subsection:first-child{margin-top:0}
.map-wrap{overflow:hidden;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow)}
.map-wrap iframe{display:block;width:100%;height:430px;border:0}
.map-caption{padding:.85rem 1rem}

/* Travel / information */
.travel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin-top:1.2rem}
.travel-card{padding:1.2rem;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.registration-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:1.2rem;align-items:start}
.payment-card{padding:1.35rem;background:#F8FAFC;border:1px solid var(--border);border-radius:16px}
.payment-card dl{display:grid;grid-template-columns:150px 1fr;gap:.45rem .8rem;margin:0}
.payment-card dt{font-weight:900;color:var(--navy-850)}
.payment-card dd{margin:0}
.magister-card{padding:1.5rem;background:linear-gradient(135deg,#EEF5F9,#fff);border:1px solid var(--border);border-radius:var(--radius)}

/* Brand panel */
.brand-panel{margin:1.5rem auto 0;max-width:1050px;padding:1rem;text-align:center;background:#fff;border:1px solid var(--border);border-radius:18px}
.brand-panel.compact{margin-top:.75rem;padding:.55rem;max-width:760px}
.brand-panel img{max-height:300px;object-fit:contain}
.brand-panel.compact img{max-height:190px}

/* Accessibility */
.accessibility-fab{
  position:fixed;right:1.1rem;bottom:1rem;z-index:950;display:inline-flex;align-items:center;gap:.45rem;
  padding:.68rem .9rem;color:#fff;background:var(--navy-950);border:2px solid var(--gold-400);border-radius:999px;
  text-decoration:none;font-weight:850;box-shadow:0 8px 22px rgba(0,0,0,.25)
}

/* Footer — solo logo azul */
.site-footer{color:#fff;background:linear-gradient(110deg,rgba(4,21,37,.95),rgba(8,43,79,.86)),url("../images/udec-campus-02-vista.jpg") center 55%/cover no-repeat;padding:3rem 1rem 1.4rem}
.footer-grid{width:min(var(--max),calc(100% - 2rem));margin:auto;display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:2rem}
.site-footer h2,.site-footer h3{color:#fff}
.site-footer a{color:#fff}
.footer-brand{display:flex;align-items:center;gap:1rem}
.footer-brand img{width:125px;height:125px;object-fit:contain}
.footer-brand strong{display:block;font-family:Georgia,"Times New Roman",serif;font-size:1.25rem;line-height:1.15}
.footer-brand span{display:block;color:var(--gold-300);margin-top:.4rem}
.footer-bottom{width:min(var(--max),calc(100% - 2rem));margin:2rem auto 0;padding-top:1rem;color:#D2DEE8;border-top:1px solid rgba(255,255,255,.22);font-size:.9rem}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}

@media(max-width:1250px){
  .institutional-inner{grid-template-columns:minmax(290px,.9fr) minmax(430px,1.1fr) auto;gap:.85rem}
  .event-emblem{width:62px;height:62px}.event-brand-copy strong{font-size:.91rem}.event-brand-copy span{font-size:.72rem}
  .partner-logo img{width:170px}.partner-logo.uta img{width:165px}.partner-collab{font-size:.7rem}
  .lang-name{display:none}
  .nav a{padding:.7rem .62rem;font-size:.9rem}
}
@media(max-width:1050px){
  .institutional-inner{grid-template-columns:1fr auto;gap:.65rem 1rem;padding:.65rem 0}
  .partner-lockup{grid-column:1/-1;justify-content:flex-start}
  .partner-logo img{width:190px}.partner-logo.uta img{width:185px}
  .menu-toggle{display:block;margin:.55rem 0 .55rem auto}
  .nav{display:none;position:absolute;top:100%;left:-1rem;right:-1rem;width:auto;padding:.7rem 1rem 1rem;background:#fff;border-top:1px solid var(--border);box-shadow:0 12px 22px rgba(4,21,37,.14)}
  .nav.open{display:block}
  .nav ul{display:block}
  .nav a{padding:.82rem;font-size:1rem}

  .hero-inner{grid-template-columns:220px 1fr;gap:1.8rem}
  .hero-emblem{width:215px}
  .institution-grid,.institutions.compact .institution-grid{grid-template-columns:1fr}
  .fact-grid{grid-template-columns:1fr 1fr}
  .fact:nth-child(2){border-right:0}
  .fact:nth-child(-n+2){border-bottom:1px solid var(--border)}
  .quick-grid{grid-template-columns:1fr 1fr}
  .card-grid{grid-template-columns:1fr 1fr}
  .committee-grid,.committee-grid.four{grid-template-columns:1fr 1fr}
  .gallery,.gallery.gallery-four{grid-template-columns:1fr 1fr}
  .timeline{grid-template-columns:1fr 1fr}
  .travel-grid{grid-template-columns:1fr 1fr}
  .registration-layout{grid-template-columns:1fr}
}
@media(max-width:720px){
    .institutional-inner{width:min(100% - 1rem,var(--header-max));grid-template-columns:1fr auto;padding:.5rem 0}
  .event-emblem{width:54px;height:54px}.event-brand-copy strong{font-size:.82rem}.event-brand-copy span{font-size:.66rem}
  .partner-lockup{gap:.4rem;overflow:hidden}.partner-logo{padding:.3rem .42rem;min-height:50px}.partner-logo img{width:128px}.partner-logo.uta img{width:125px}.partner-collab{font-size:.62rem;white-space:normal;line-height:1.1}
  .lang-switcher a{padding:.45rem .5rem}.lang-name{display:none}
  .nav-inner{width:min(100% - 1rem,var(--header-max))}
  .hero-inner{min-height:auto;padding:2.35rem 0 2.7rem;grid-template-columns:1fr;text-align:center}
  .hero-emblem{width:175px}.hero-copy{margin:auto}.hero-meta{justify-content:center}
  .hero-actions,.hero-extra-actions{grid-template-columns:1fr}
  .fact-grid,.home-welcome,.quick-grid,.card-grid,.two-col,.committee-grid,.committee-grid.four,.gallery,.gallery.gallery-four,.timeline,.travel-grid,.footer-grid{grid-template-columns:1fr}
  .fact{border-right:0;border-bottom:1px solid var(--border)}.fact:last-child{border-bottom:0}
  main section{padding:3.5rem 1rem}.map-wrap iframe{height:340px}
  .accessibility-fab{right:.65rem;bottom:.65rem;font-size:.85rem}
  .footer-brand{align-items:flex-start}.footer-brand img{width:95px;height:95px}
  .payment-card dl{grid-template-columns:1fr}.payment-card dd{margin-bottom:.45rem}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

/* Bases */
.pdf-viewer{
  overflow:hidden;
  border:1px solid var(--border);
  border-radius:16px;
  background:#fff;
  box-shadow:var(--shadow);
}
.pdf-viewer iframe{
  display:block;
  width:100%;
  height:780px;
  border:0;
}
@media(max-width:720px){
  .pdf-viewer iframe{height:560px}
}

/* Identidad del Congreso con texto HTML actualizable */
.congress-lockup{display:flex!important;align-items:center;gap:1rem;text-align:left}
.congress-lockup img{width:92px!important;height:92px;object-fit:contain;flex:0 0 auto}
.congress-lockup strong{display:block;color:var(--navy-850);font-family:Georgia,"Times New Roman",serif;font-size:1.25rem;line-height:1.15}
.congress-lockup span{display:block;margin-top:.4rem;color:var(--gold-700);font-weight:850}
@media(max-width:720px){.congress-lockup{align-items:flex-start}.congress-lockup img{width:74px!important;height:74px}.congress-lockup strong{font-size:1.05rem}}

body{overflow-x:hidden}
.info-nav-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1.2rem}.contact-social{margin-top:2.4rem;padding-top:1.5rem;border-top:1px solid var(--border)}
.program-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.program-grid .info-card{min-width:0;overflow:hidden}.program-grid .table-wrap{overflow-x:auto}.program-grid table{min-width:0;table-layout:auto}.program-grid th:first-child,.program-grid td:first-child{white-space:nowrap;width:31%}
@media(max-width:1180px){.program-grid{grid-template-columns:1fr}.program-grid table{width:100%}}
@media(max-width:1050px){
  .institutional-inner{grid-template-columns:1fr auto;gap:.6rem 1rem;padding:.55rem 0}.partner-lockup{grid-column:1/-1;justify-content:flex-start}.partner-logo img{width:190px}.partner-logo.uta img{width:185px}
  .menu-toggle{display:block;margin:.55rem 0 .55rem auto}.nav{display:none;position:absolute;top:100%;left:-1rem;right:-1rem;width:auto;padding:.65rem 1rem 1rem;background:var(--nav-blue);border-top:1px solid rgba(255,255,255,.25);box-shadow:0 12px 22px rgba(4,21,37,.16)}.nav.open{display:block}.nav>ul{display:block}.nav a{padding:.82rem;font-size:1rem}.nav-parent{justify-content:space-between}.submenu-toggle{padding:.8rem;font-size:1.1rem}.has-submenu:hover>.submenu{display:none}.has-submenu.submenu-open>.submenu,.has-submenu:focus-within>.submenu{display:block}.submenu{position:static;min-width:0;margin:.1rem 0 .4rem;padding:.35rem;background:rgba(255,255,255,.10);border:0;border-radius:10px;box-shadow:none}.submenu a{color:#fff;padding:.65rem .9rem}.submenu a:hover,.submenu a[aria-current="page"]{background:#fff;color:var(--navy-850)}
  .info-nav-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  .institutional-inner{width:min(100% - 1rem,var(--header-max));grid-template-columns:1fr auto;padding:.55rem 0}.event-emblem{width:54px;height:54px}.event-brand-copy strong{font-size:.82rem}.event-brand-copy span{font-size:.66rem}.partner-lockup{gap:.38rem;overflow:visible}.partner-logo{padding:.1rem;min-height:48px}.partner-logo img{width:125px}.partner-logo.uta img{width:126px}.partner-collab{font-size:.61rem;white-space:normal;line-height:1.1}.lang-switcher a{padding:.45rem .5rem}.lang-name{display:none}.nav-inner{width:min(100% - 1rem,var(--header-max))}.info-nav-grid{grid-template-columns:1fr}.program-grid table{font-size:.94rem}.program-grid th,.program-grid td{padding:.68rem .55rem}.program-grid th:first-child,.program-grid td:first-child{width:35%}
}


/* =========================================================
   V8 — Cuenta regresiva y navegación móvil robusta
   ========================================================= */
.congress-countdown{
  max-width:760px;
  margin:1.15rem 0 0;
  padding:1rem 1.05rem 1.1rem;
  border:1px solid rgba(255,255,255,.28);
  border-radius:16px;
  background:linear-gradient(135deg,rgba(4,21,37,.46),rgba(14,74,125,.30));
  box-shadow:0 12px 28px rgba(0,0,0,.16);
  backdrop-filter:blur(2px);
}
.countdown-eyebrow{
  margin:0 0 .2rem;
  color:var(--gold-300);
  text-transform:uppercase;
  letter-spacing:.09em;
  font-size:.72rem;
  font-weight:900;
}
.countdown-title{
  margin:0 0 .8rem;
  color:#fff;
  font-family:Georgia,"Times New Roman",serif;
  font-size:1.18rem;
  line-height:1.2;
}
.countdown-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:.65rem;
}
.countdown-unit{
  min-width:0;
  padding:.72rem .5rem;
  text-align:center;
  border-radius:12px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.18);
}
.countdown-unit strong{
  display:block;
  color:#fff;
  font-size:clamp(1.55rem,3vw,2.15rem);
  line-height:1;
  font-variant-numeric:tabular-nums;
}
.countdown-unit span{
  display:block;
  margin-top:.32rem;
  color:var(--gold-200,#F5D77A);
  font-size:.78rem;
  font-weight:850;
}
.countdown-status{
  margin:.65rem 0 0;
  color:#fff;
  font-weight:800;
}
.countdown-status:empty{display:none}

/* El fondo no se desplaza mientras el menú móvil está abierto. */
html.menu-open,
body.menu-open{overscroll-behavior:none}
body.menu-open{
  position:fixed;
  left:0;
  right:0;
  width:100%;
  overflow:hidden;
}

/* Asegura que el panel móvil quede sobre el contenido y tenga scroll propio. */
@media(max-width:1050px){
  body.menu-open .site-header{display:none}
  body.menu-open .nav-bar{position:fixed;top:0;left:0;right:0;width:100%;z-index:1500}
  .nav-bar{z-index:1300}
  .menu-toggle{position:relative;z-index:1402}
  .nav.open{
    display:block;
    position:fixed;
    top:var(--mobile-menu-top,62px);
    left:0;
    right:0;
    bottom:0;
    width:100%;
    height:calc(100dvh - var(--mobile-menu-top,62px));
    max-height:none;
    overflow-y:scroll;
    overflow-x:hidden;
    overscroll-behavior:contain;
    -webkit-overflow-scrolling:touch;
    padding:.6rem max(1rem,env(safe-area-inset-left)) calc(3rem + env(safe-area-inset-bottom)) max(1rem,env(safe-area-inset-right));
    background:var(--nav-blue);
    border-top:1px solid rgba(255,255,255,.25);
    box-shadow:0 12px 22px rgba(4,21,37,.18);
    z-index:1400;
    scrollbar-gutter:stable;
  }
  .nav.open>ul{
    width:min(100%,720px);
    margin:0 auto;
    padding-bottom:.5rem;
  }
  .nav.open a{white-space:normal}
  .nav.open .submenu{
    overflow:visible;
    max-height:none;
  }
}
@media(max-width:720px){
  .countdown-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .congress-countdown{margin:1rem auto 0;text-align:left}
  .countdown-title,.countdown-eyebrow{text-align:center}
}

/* V8.1 — La identidad institucional se desplaza con la página.
   Solo la navegación permanece fija al bajar. */
.site-header{position:relative!important;top:auto!important}
.nav-bar{position:sticky!important;top:0!important}
@media(max-width:1050px){
  body.menu-open .site-header{display:none!important}
  body.menu-open .nav-bar{
    position:fixed!important;
    top:0!important;
    left:0!important;
    right:0!important;
  }
  .nav.open{
    min-height:0;
    touch-action:pan-y;
  }
}


/* =========================================================
   V8.2 — MENÚ MÓVIL OVERLAY A PANTALLA COMPLETA
   Segunda estrategia: independiente del header y del scroll
   de la página. Escritorio permanece sin cambios.
   ========================================================= */
.mobile-nav-overlay{
  display:none;
}

@media(max-width:1050px){
  /* En móvil la navegación original no se despliega: el botón abre el overlay. */
  .nav-bar .nav{
    display:none!important;
  }

  .menu-toggle{
    display:block!important;
    margin:.55rem 0 .55rem auto;
    position:relative;
    z-index:1;
  }

  .mobile-nav-overlay{
    position:fixed;
    inset:0;
    width:100%;
    height:100dvh;
    z-index:9999;
    background:var(--nav-blue);
    color:#fff;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateX(100%);
    transition:transform .22s ease,opacity .18s ease,visibility 0s linear .22s;
  }

  .mobile-nav-overlay.is-open{
    display:block;
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:translateX(0);
    transition:transform .22s ease,opacity .18s ease;
  }

  .mobile-nav-shell{
    height:100dvh;
    min-height:0;
    display:grid;
    grid-template-rows:auto minmax(0,1fr) auto;
    overflow:hidden;
    padding:
      env(safe-area-inset-top)
      env(safe-area-inset-right)
      env(safe-area-inset-bottom)
      env(safe-area-inset-left);
  }

  .mobile-nav-header{
    min-height:72px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:1rem;
    padding:.85rem 1rem;
    border-bottom:1px solid rgba(255,255,255,.22);
    background:rgba(4,21,37,.20);
  }

  .mobile-nav-title{
    margin:0;
    color:#fff;
    font-size:1.25rem;
    font-weight:950;
  }

  .mobile-nav-close{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:.45rem;
    min-height:48px;
    padding:.68rem .9rem;
    border:2px solid rgba(255,255,255,.88);
    border-radius:12px;
    background:#fff;
    color:var(--navy-900);
    font:inherit;
    font-weight:900;
    cursor:pointer;
  }

  .mobile-nav-close:focus-visible,
  .mobile-overlay-nav a:focus-visible,
  .mobile-overlay-nav .submenu-toggle:focus-visible,
  .mobile-overlay-languages a:focus-visible{
    outline:3px solid var(--gold-300);
    outline-offset:3px;
  }

  /* Esta es la ÚNICA zona que hace scroll. */
  .mobile-overlay-nav{
    min-height:0;
    overflow-y:auto;
    overflow-x:hidden;
    overscroll-behavior:contain;
    -webkit-overflow-scrolling:touch;
    touch-action:pan-y;
    scrollbar-gutter:stable;
    padding:.55rem 1rem 2rem;
  }

  .mobile-overlay-nav>ul{
    display:block!important;
    width:min(100%,720px);
    margin:0 auto;
    padding:0;
    list-style:none;
  }

  .mobile-overlay-nav li{
    position:relative;
    display:block;
    list-style:none;
    margin:.08rem 0;
  }

  .mobile-overlay-nav a{
    display:block;
    padding:1rem .9rem;
    border-radius:12px;
    color:#fff;
    text-decoration:none;
    font-size:1.07rem;
    line-height:1.25;
    font-weight:850;
    white-space:normal;
  }

  .mobile-overlay-nav a:hover{
    background:rgba(255,255,255,.12);
    color:#fff;
  }

  .mobile-overlay-nav a[aria-current="page"]{
    background:var(--gold-400);
    color:var(--navy-950);
  }

  .mobile-overlay-nav .nav-parent{
    display:grid;
    grid-template-columns:minmax(0,1fr) 52px;
    align-items:center;
    gap:.25rem;
  }

  .mobile-overlay-nav .submenu-toggle{
    width:48px;
    height:48px;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    border:1px solid rgba(255,255,255,.38);
    border-radius:11px;
    background:rgba(255,255,255,.08);
    color:#fff;
    font-size:1.18rem;
    font-weight:950;
    cursor:pointer;
  }

  .mobile-overlay-nav .submenu{
    display:none!important;
    position:static!important;
    min-width:0!important;
    width:auto!important;
    margin:.15rem .25rem .55rem!important;
    padding:.3rem!important;
    border:0!important;
    border-radius:13px!important;
    box-shadow:none!important;
    background:rgba(255,255,255,.10)!important;
  }

  .mobile-overlay-nav .has-submenu.submenu-open>.submenu{
    display:block!important;
  }

  .mobile-overlay-nav .submenu a{
    padding:.8rem .9rem;
    color:#fff;
    font-size:.98rem;
    font-weight:760;
  }

  .mobile-overlay-nav .submenu a:hover,
  .mobile-overlay-nav .submenu a[aria-current="page"]{
    background:#fff;
    color:var(--navy-900);
  }

  .mobile-overlay-languages{
    padding:.8rem 1rem calc(.9rem + env(safe-area-inset-bottom));
    border-top:1px solid rgba(255,255,255,.22);
    background:rgba(4,21,37,.22);
  }

  .mobile-overlay-lang-label{
    width:min(100%,720px);
    margin:0 auto .55rem;
    color:rgba(255,255,255,.82);
    font-size:.75rem;
    font-weight:900;
    letter-spacing:.08em;
    text-transform:uppercase;
  }

  .mobile-overlay-languages .lang-switcher{
    width:min(100%,720px);
    margin:0 auto;
    display:flex!important;
    justify-content:flex-start;
    flex-wrap:wrap;
    gap:.5rem;
  }

  .mobile-overlay-languages .lang-switcher a{
    min-height:44px;
    padding:.55rem .72rem;
    border:1.5px solid rgba(255,255,255,.70);
    background:transparent;
    color:#fff;
  }

  .mobile-overlay-languages .lang-switcher a[aria-current="true"]{
    background:var(--gold-400);
    border-color:var(--gold-400);
    color:var(--navy-950);
  }

  .mobile-overlay-languages .lang-name{
    display:inline!important;
  }

  /* La página detrás queda completamente inmóvil. */
  html.mobile-overlay-open,
  body.mobile-overlay-open{
    overflow:hidden!important;
    overscroll-behavior:none!important;
  }

  body.mobile-overlay-open{
    position:fixed!important;
    left:0!important;
    right:0!important;
    width:100%!important;
  }

  body.mobile-overlay-open .accessibility-fab{
    visibility:hidden!important;
  }
}

@media(max-width:520px){
  .mobile-nav-header{min-height:66px}
  .mobile-nav-title{font-size:1.15rem}
  .mobile-nav-close{min-height:44px;padding:.58rem .72rem}
  .mobile-overlay-nav{padding:.4rem .75rem 1.7rem}
  .mobile-overlay-nav a{padding:.9rem .75rem;font-size:1rem}
  .mobile-overlay-languages{padding-left:.75rem;padding-right:.75rem}
}

@media(prefers-reduced-motion:reduce){
  .mobile-nav-overlay{
    transition:none!important;
  }
}

/* V9 — barra azul UdeC y desplegable blanco */
.submenu{
  background:#fff !important;
}
.submenu a{
  color:var(--navy-850);
}
.contribution-card{
  display:flex;
  flex-direction:column;
}
.contribution-card .contribution-download{
  margin-top:auto;
  align-self:flex-start;
}
.download-note{
  margin:.55rem 0 0;
  font-size:.82rem;
  color:var(--muted);
  line-height:1.45;
}
@media(max-width:1050px){
  /* En el menú móvil overlay se conserva la estética azul del panel. */
  .mobile-overlay-nav .submenu{
    background:rgba(255,255,255,.10) !important;
  }
}


/* V10 — sección Magíster más visual */
.magister-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:1.2rem;align-items:start}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1.1rem}
.stat-card{padding:1rem 1.1rem;background:#fff;border:1px solid var(--border);border-radius:14px}
.stat-card .tag{display:inline-block;margin-bottom:.55rem;padding:.25rem .6rem;background:var(--soft-blue);color:var(--navy-850);border-radius:999px;font-size:.78rem;font-weight:900}
.stat-card p{margin:.2rem 0 0}
.social-panel{padding:1.35rem;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow)}
.social-panel h2{margin-top:0;font-size:1.55rem}
.social-panel ul{margin:.8rem 0 1rem 1.15rem;padding:0}
.social-panel li{margin:.45rem 0}
.social-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1rem}
.gallery.magister-gallery{margin-top:1.2rem}
.gallery.magister-gallery figure{box-shadow:var(--shadow)}
.inline-handle{display:inline-flex;align-items:center;gap:.35rem;font-weight:850}
@media(max-width:1050px){
  .magister-layout,.stat-grid{grid-template-columns:1fr}
}

/* V11 — actualización institucional, Magíster y autoridades */
.udec-authorities{display:grid;grid-template-columns:1.35fr .65fr;gap:1.25rem;align-items:start;margin-top:1.25rem}
.authority-group-photo{margin:0;overflow:hidden;background:#fff;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow)}
.authority-group-photo img{display:block;width:100%;height:auto}
.authority-group-photo figcaption{padding:.9rem 1rem;color:#405061;font-size:.92rem}
.rector-highlight{background:linear-gradient(145deg,#EEF5F9,#fff);border:1px solid var(--border);border-radius:16px;padding:1.25rem;box-shadow:var(--shadow)}
.rector-highlight img{display:block;width:180px;height:180px;margin:0 auto 1rem;object-fit:cover;border-radius:50%;border:5px solid #fff;box-shadow:0 5px 20px rgba(0,0,0,.12)}
.rector-highlight h3{margin:.35rem 0;text-align:center}
.rector-highlight p{text-align:center}
.faculty-authorities{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:1rem;margin-top:1.25rem}
.faculty-authority{padding:1rem;text-align:center;background:#fff;border:1px solid var(--border);border-radius:15px}
.faculty-authority img{display:block;width:150px;height:150px;margin:0 auto .8rem;object-fit:cover;border-radius:50%;border:4px solid #EEF5F9}
.faculty-authority h3{margin:.25rem 0;font-size:1rem}
.faculty-authority p{margin:.25rem 0;color:#526171;font-size:.9rem}
.rector-page-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:1.4rem;align-items:start}
.rector-page-grid .portrait{overflow:hidden;border-radius:18px;box-shadow:var(--shadow)}
.rector-page-grid .portrait img{display:block;width:100%;height:auto}
.rector-history{padding:1.4rem;background:linear-gradient(135deg,#EEF5F9,#fff);border:1px solid var(--border);border-radius:18px}
.rector-gallery{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1.3rem}
.rector-gallery img{width:100%;height:350px;object-fit:cover;border-radius:14px}
.academic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;margin-top:1.3rem}
.academic-card{overflow:hidden;background:#fff;border:1px solid var(--border);border-radius:15px}
.academic-card img{display:block;width:100%;aspect-ratio:1/1;object-fit:cover;background:#EEF5F9}
.academic-card-body{padding:1rem}
.academic-card h3{margin:0 0 .35rem;font-size:1rem}
.academic-card .degree{min-height:2.8em;color:#526171;font-size:.88rem}
.academic-card details{margin:.75rem 0 0;border-radius:9px}
.academic-card summary{padding:.7rem .8rem;font-size:.88rem}
.academic-card .details-body{padding:.8rem;font-size:.88rem}
.study-plan{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;margin-top:1.2rem}
.semester-card{padding:1.05rem;background:#fff;border:1px solid var(--border);border-top:5px solid var(--nav-blue);border-radius:14px}
.semester-card h3{margin-top:0}
.semester-card ul{padding-left:1.15rem;margin-bottom:0}
.competency-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-top:1.2rem}
.testimonial-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin-top:1.2rem}
.testimonial-card{padding:1.2rem;background:#fff;border:1px solid var(--border);border-radius:15px}
.testimonial-card blockquote{margin:0 0 .8rem;font-size:.98rem}
.source-note{font-size:.84rem;color:#5B6775}
@media(max-width:1050px){
  .udec-authorities,.rector-page-grid{grid-template-columns:1fr}
  .faculty-authorities{grid-template-columns:repeat(2,1fr)}
  .academic-grid{grid-template-columns:repeat(3,1fr)}
  .study-plan{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:700px){
  .faculty-authorities,.academic-grid,.study-plan,.competency-grid,.testimonial-grid,.rector-gallery{grid-template-columns:1fr}
  .rector-gallery img{height:auto}
}

/* V12 — invited talks, authority portrait, submission resources and visits */
.speaker-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.25rem;margin-top:1.25rem}
.speaker-card{display:flex;gap:1.15rem;align-items:start;background:#fff;border:1px solid var(--border);border-radius:16px;padding:1rem;box-shadow:var(--shadow)}
.speaker-card img{width:116px;height:144px;flex:0 0 116px;object-fit:cover;object-position:center 24%;border-radius:10px}
.speaker-card h3{font-size:1.08rem;margin:.2rem 0 .6rem}
.speaker-title{margin:0;line-height:1.45}
.udec-officers{display:grid;gap:1.25rem}
.director-docencia img{object-position:center 20%}
.director-photo-frame{position:relative;display:block;width:120px;height:120px;overflow:hidden;border-radius:50%;border:4px solid #e69b0a}
.director-photo-frame .director-photo{position:absolute;display:block;width:150%;height:150%;max-width:none;left:-25%;top:-8%;object-fit:cover}
.academic-director-frame{position:relative;display:block;overflow:hidden;aspect-ratio:1/1}
.academic-card .academic-director-frame img.academic-director-photo{position:absolute;display:block;width:150%;height:150%;max-width:none;left:-25%;top:-8%;object-fit:cover}
.guideline-table-wrap{overflow-x:auto;margin:1rem 0 2rem}
.guideline-table{width:100%;border-collapse:collapse;background:#fff}
.guideline-table th,.guideline-table td{padding:.78rem 1rem;border:1px solid var(--border);text-align:left}
.guideline-table thead{background:#223c6a;color:#fff}
.guideline-table tbody tr:nth-child(even){background:#f2f6fa}
.identity-assets{display:grid;grid-template-columns:minmax(160px,240px) 1fr;gap:1.4rem;align-items:center;padding:1.4rem;background:#fff;border:1px solid var(--border);border-radius:16px}
.identity-assets img{width:100%;height:auto}
.identity-downloads{display:flex;flex-wrap:wrap;align-items:start;gap:.65rem}
.identity-downloads .download-note{width:100%;margin:.2rem 0}
.visit-count{margin:.2rem 0 .7rem;font-weight:700}
@media(max-width:700px){.speaker-grid,.identity-assets{grid-template-columns:1fr}.speaker-card{display:block}.speaker-card img{width:100%;height:190px;margin-bottom:.8rem}.identity-assets img{max-width:210px;margin:auto}}