:root{
  --bg:#1A3E62; /* updated background */
  --text:#ffffff; /* site text color */
  --card:rgba(255,255,255,0.06); /* translucent card for contrast */
  --accent:#2b6cb0;
  --muted:rgba(255,255,255,0.85);
  --link-unvisited:#e0e0e0; /* enlaces no visitados (gris claro) */
  --link-visited:#9aa0a6; /* enlaces visitados (gris más oscuro) */
  --max-width:1100px;
}
*{box-sizing:border-box}
body{font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;margin:0;background:var(--bg);color:var(--text)}
.container{max-width:var(--max-width);margin:0 auto;padding:1rem}
.site-header{background:transparent;box-shadow:none}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding:1.25rem 1rem} 
.brand{display:flex;align-items:center;color:var(--text);text-decoration:none}
.brand-logo{height:108px;width:auto;display:block}
@media (max-width:800px){
  .brand-logo{height:72px}
}
@media (max-width:480px){
  .brand-logo{height:48px}
}
/* Screen-reader only text */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.site-nav a{margin-left:1rem;color:var(--link-unvisited);text-decoration:none}

/* username displayed left of "Acceso" */
.nav-user{display:inline-block;margin-right:.5rem;color:var(--text);font-weight:600}
.nav-user:empty{display:none}

/* logout button inside nav */
.nav-logout{margin-left:.5rem;background:transparent;border:1px solid rgba(255,255,255,0.12);color:var(--text);padding:.25rem .5rem;border-radius:6px;font-size:.9rem}
.nav-logout:hover{background:rgba(255,255,255,0.04)}
.nav-logout:focus{outline:2px solid rgba(255,255,255,0.12);outline-offset:2px}

/* Link color states: unvisited (gris claro) and visited (gris más oscuro) */
a{color:var(--link-unvisited)}
a:visited{color:var(--link-visited)}
.nav-toggle{display:none;background:transparent;border:0;font-size:1.25rem}
.hero{padding:4rem 0;text-align:center;background:linear-gradient(180deg,rgba(0,0,0,0.06),transparent)}
.hero h1{margin:0 0 .5rem;font-size:2rem}
.btn{display:inline-block;background:#ffffff;color:var(--bg);padding:.5rem 1rem;border-radius:6px;text-decoration:none}
.form-select, select{color:#1A3E62;background:#ffffff;border:1px solid rgba(0,0,0,0.08)}
.form-select option, select option{color:#1A3E62}
.content{padding:2rem 0}
.grid-items{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.grid-items article{background:var(--card);padding:1rem;border-radius:8px;box-shadow:0 1px 2px rgba(0,0,0,.04);color:var(--text)}
.site-footer{padding:1rem 0;text-align:center;color:var(--text)}
.form-msg{margin-top:.5rem;color:var(--text)}

/* Contact & Access forms - fields stacked vertically */
#contact-form label, #access-form label{display:block;margin-top:.75rem;margin-bottom:.25rem;font-weight:600}
#contact-form input[type="text"],
#contact-form input[type="email"],
#contact-form textarea,
#access-form input[type="text"],
#access-form input[type="email"],
#access-form input[type="password"],
#access-form textarea{display:block;width:100%;padding:.5rem;border-radius:6px;border:1px solid rgba(255,255,255,0.08);background:rgba(255,255,255,0.02);color:var(--text)}
#contact-form textarea, #access-form textarea{min-height:120px;resize:vertical}
#contact-form .form-actions, #access-form .form-actions{display:flex;flex-direction:column;gap:.5rem;align-items:stretch;margin-top:1rem}
#contact-form .form-actions .btn, #access-form .form-actions .btn{width:100%}

@media (max-width:800px){
  .grid-items{grid-template-columns:1fr}
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:70px;right:1rem;background:var(--card);padding:.75rem;border-radius:8px;display:none;flex-direction:column}
  .site-nav a{margin:0 .25rem;padding:.5rem 0}
  .site-nav.open{display:flex}
}

/* Table sorting indicators */
table thead th{cursor:pointer}
.sort-asc::after{content:" \25B2";font-size:.8em}
.sort-desc::after{content:" \25BC";font-size:.8em}