/* IT2GO® Universidad — estilos */
:root{
  --navy:#001A2C; --navy-2:#0B2A3F; --green:#00A282; --green-d:#008a6f;
  --hero-1:#012640; --hero-2:#024a78; --eyebrow:#7fe7d1;
  --bg:#F4F8F9; --card:#ffffff; --ink:#33444F; --muted:#7d8c95;
  --line:#e4ecef; --soft:#E6F5F1; --danger:#c0392b; --amber:#b07d2b;
  --r:14px; --shadow:0 4px 18px rgba(0,26,44,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{background:#fff}
body{font-family:'Inter',Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--ink);min-height:100vh;
  display:flex;flex-direction:column;position:relative}
h1,h2,h3,.display{font-family:'Sora',Segoe UI,sans-serif}
a{color:var(--green);text-decoration:none}
button{font-family:inherit;cursor:pointer}

/* ── Fondo neuronal global ── */
#netbg{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}

/* ── Topbar navy con logo ── */
.topbar{background:var(--navy);position:relative;z-index:50;box-shadow:0 2px 14px rgba(1,38,64,.18)}
.topbar__in{display:flex;align-items:center;justify-content:space-between;height:64px;
  max-width:1180px;margin:0 auto;padding:0 24px}
.brand{display:flex;align-items:center}
.brand__logo{height:30px;width:auto;display:block}

/* ── Hero azul con lazo ── */
.hero{position:relative;overflow:hidden;background:linear-gradient(160deg,var(--hero-1) 0%,var(--hero-2) 100%);
  color:#fff;padding:54px 24px 88px;z-index:1}
.flourish{position:absolute;pointer-events:none;z-index:0;line-height:0}
.flourish svg{display:block;width:100%;height:auto}
.flourish--hero{top:-6px;right:-30px;width:min(520px,52%);color:#fff;opacity:.95}
.flourish--foot{bottom:-30px;right:-20px;width:min(430px,46%);color:#fff;opacity:.95}
.hero-inner{position:relative;max-width:1180px;margin:0 auto;z-index:2}
.hero .eyebrow{color:var(--eyebrow);font-weight:700;letter-spacing:.18em;text-transform:uppercase;font-size:12px}
.hero h1{font-size:clamp(28px,4.5vw,46px);font-weight:800;margin:10px 0 8px;color:#fff}
.hero p{color:rgba(255,255,255,.9);max-width:640px;font-size:16px;font-weight:500}
.hero-actions{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap}

.btn{display:inline-flex;align-items:center;gap:8px;border:none;border-radius:10px;
  padding:11px 22px;font-weight:600;font-size:14px;transition:.18s}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover{background:var(--green-d)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.35)}
.btn-ghost:hover{border-color:var(--green);color:var(--green)}
.btn-line{background:#fff;color:var(--navy);border:1.5px solid var(--line)}
.btn-line:hover{border-color:var(--green);color:var(--green)}
.btn-sm{padding:7px 14px;font-size:13px;border-radius:8px}
.btn:disabled{opacity:.55;cursor:not-allowed}

/* ── Sesión (dentro del hero) ── */
.session-bar{display:flex;gap:10px;align-items:center;justify-content:flex-end;margin-bottom:18px;position:relative;z-index:2}
.session-bar .who{color:rgba(255,255,255,.85);font-size:13px}
.session-bar .who b{color:#fff}

/* ── Layout catálogo ── */
.wrap{max-width:1180px;margin:-46px auto 60px;padding:0 24px;position:relative;z-index:1;display:grid;
  grid-template-columns:250px 1fr;gap:24px;align-items:start;flex:1;width:100%}
@media(max-width:880px){.wrap{grid-template-columns:1fr}}

.panel{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);padding:20px}
.filters{position:sticky;top:18px}
.filters h3{font-size:14px;color:var(--navy);margin-bottom:10px;display:flex;justify-content:space-between;align-items:center}
.filters .group{margin-bottom:18px}
.filters label{display:flex;gap:8px;align-items:center;font-size:14px;padding:5px 0;cursor:pointer;color:var(--ink)}
.filters input[type=checkbox]{accent-color:var(--green);width:16px;height:16px}
.search{width:100%;border:1.5px solid var(--line);border-radius:10px;padding:10px 14px;font-size:14px;margin-bottom:16px}
.search:focus{outline:none;border-color:var(--green)}

/* ── Tarjetas de video ── */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:20px}
.vcard{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .18s}
.vcard:hover{transform:translateY(-3px)}
.thumb{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,var(--navy),var(--navy-2));
  display:flex;align-items:center;justify-content:center;cursor:pointer}
.thumb img{width:100%;height:100%;object-fit:cover}
.thumb .play{position:absolute;width:54px;height:54px;border-radius:50%;background:rgba(0,162,130,.92);
  display:flex;align-items:center;justify-content:center;transition:.18s}
.thumb:hover .play{transform:scale(1.08)}
.thumb .play svg{margin-left:3px}
.thumb .dur{position:absolute;right:8px;bottom:8px;background:rgba(0,26,44,.85);color:#fff;
  font-size:11px;padding:3px 8px;border-radius:6px}
.badge{position:absolute;left:8px;top:8px;font-size:11px;font-weight:600;padding:4px 10px;border-radius:20px}
.badge.public{background:var(--soft);color:var(--green-d)}
.badge.registered{background:#fff4e0;color:var(--amber)}
.badge.private{background:#001A2Cdd;color:#7fe0c8}
.vbody{padding:16px;flex:1;display:flex;flex-direction:column;gap:6px}
.vbody .marca{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--green)}
.vbody h3{font-size:15.5px;color:var(--navy);line-height:1.35}
.vbody p{font-size:13px;color:var(--muted);flex:1}
.empty{grid-column:1/-1;text-align:center;color:var(--muted);padding:60px 0}

/* ── Modales ── */
.modal-bg{position:fixed;inset:0;background:rgba(0,26,44,.62);display:none;align-items:center;
  justify-content:center;z-index:50;padding:18px}
.modal-bg.open{display:flex}
.modal{background:#fff;border-radius:16px;max-width:430px;width:100%;padding:30px;position:relative;
  max-height:92vh;overflow:auto}
.modal.player{max-width:900px;background:var(--navy);padding:14px}
.modal h2{color:var(--navy);font-size:20px;margin-bottom:6px}
.modal .sub{color:var(--muted);font-size:13.5px;margin-bottom:18px}
.modal .x{position:absolute;top:12px;right:14px;background:none;border:none;font-size:22px;color:var(--muted)}
.modal.player .x{color:#fff;z-index:2}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--navy);margin-bottom:5px}
.field input{width:100%;border:1.5px solid var(--line);border-radius:10px;padding:11px 14px;font-size:14px}
.field input:focus{outline:none;border-color:var(--green)}
.field .hint{font-size:12px;color:var(--muted);margin-top:4px}
.msg{border-radius:10px;padding:10px 14px;font-size:13.5px;margin-bottom:14px;display:none}
.msg.err{display:block;background:#fdecea;color:var(--danger)}
.msg.ok{display:block;background:var(--soft);color:var(--green-d)}
.modal .alt{text-align:center;font-size:13.5px;color:var(--muted);margin-top:14px}
.code-input{letter-spacing:12px;text-align:center;font-size:24px;font-weight:700}
video{width:100%;border-radius:10px;display:block;background:#000}
.player-title{color:#fff;font-size:15px;padding:10px 4px 4px;font-family:'Sora',sans-serif}

/* ── Footer verde con lazo ── */
.foot{position:relative;overflow:hidden;background:var(--green);color:#fff;padding:40px 24px;text-align:center;z-index:1}
.foot .wrap{display:block;max-width:1180px;margin:0 auto;position:relative;z-index:2}
.foot__logo{height:30px;width:auto;display:block;margin:0 auto 12px}
.foot p{margin:3px 0;font-size:14px;color:rgba(255,255,255,.9)}
.foot a{color:#fff;text-decoration:underline}
@media (prefers-reduced-motion: reduce){
  .vcard,.btn,.thumb .play{transition:none}
  #netbg{display:none}
}

/* ── Fecha en tarjeta ── */
.vbody .vdate{font-size:12px;color:var(--muted);margin-top:2px}

/* ── Botón de descarga en el player ── */
.player-title{display:flex;align-items:center;justify-content:space-between;gap:10px}
#playerDownload{flex-shrink:0}