:root{--azul:#1e3a8a;--azul2:#0f172a;--dorado:#f59e0b;--rojo:#991b1b;--gris:#f8fafc;--borde:#e5e7eb;--texto:#111827}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--gris);color:var(--texto)}a{text-decoration:none;color:inherit}.topbar{background:linear-gradient(135deg,var(--azul2),var(--azul));color:white;padding:18px 24px;display:flex;gap:18px;align-items:center}.topbar h1{margin:0;font-size:24px}.topbar p{margin:4px 0 0;opacity:.9}.logos{display:flex;gap:8px}.logo-box{width:54px;height:54px;border-radius:14px;background:white;color:var(--azul);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:12px}.navbar{display:flex;gap:10px;flex-wrap:wrap;background:white;padding:12px 24px;border-bottom:1px solid var(--borde)}.navbar a{padding:8px 12px;border-radius:10px;background:#f1f5f9}.layout{display:grid;grid-template-columns:240px 1fr;gap:20px;padding:20px}.sidebar{background:white;border:1px solid var(--borde);border-radius:18px;padding:16px;height:max-content;display:flex;flex-direction:column;gap:8px}.sidebar a{padding:10px;border-radius:10px;background:#f8fafc}.container{padding:24px}.card{background:white;border:1px solid var(--borde);border-radius:20px;padding:20px;box-shadow:0 10px 30px rgba(15,23,42,.05)}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.metric{background:white;border:1px solid var(--borde);border-radius:18px;padding:18px}.metric span{color:#64748b;font-size:14px}.metric strong{display:block;font-size:30px;color:var(--azul);margin-top:6px}.btn{display:inline-block;padding:11px 16px;border-radius:12px;background:var(--azul);color:white;border:0;cursor:pointer;font-weight:700}.btn.secondary{background:var(--dorado);color:#111827}.btn.light{background:#f1f5f9;color:#111827}.hero{min-height:calc(100vh - 150px);display:grid;place-items:center;padding:24px}.hero-card{max-width:980px;text-align:center}.hero h2{font-size:44px;margin:0;color:var(--azul2)}.hero p{font-size:18px;color:#475569}.login{max-width:420px;margin:40px auto}.form-group{margin-bottom:14px}.form-group label{display:block;font-weight:700;margin-bottom:6px}.input{width:100%;padding:12px 14px;border:1px solid var(--borde);border-radius:12px;font-size:16px}.alert{background:#fef3c7;border:1px solid #fde68a;border-radius:12px;padding:12px;margin-bottom:14px}.table{width:100%;border-collapse:collapse;background:white}.table th,.table td{padding:12px;border-bottom:1px solid var(--borde);text-align:left}.footer{text-align:center;color:#64748b;padding:22px}@media(max-width:800px){.layout{grid-template-columns:1fr}.grid{grid-template-columns:1fr}.topbar{align-items:flex-start;flex-direction:column}.hero h2{font-size:30px}}
.actions{display:flex;gap:8px;flex-wrap:wrap}.btn.danger{background:#991b1b;color:white}.btn.small{padding:7px 10px;border-radius:9px;font-size:13px}.alert.ok{background:#dcfce7;border-color:#86efac}.alert.error{background:#fee2e2;border-color:#fecaca}.alert.warn{background:#fef3c7;border-color:#fde68a}.filters{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:12px 0}.badge{display:inline-block;padding:5px 9px;border-radius:999px;background:#e0f2fe;color:#075985;font-weight:700;font-size:12px}.badge.off{background:#fee2e2;color:#991b1b}.muted{color:#64748b}.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:space-between;margin-bottom:12px}.nowrap{white-space:nowrap}.table-wrap{overflow:auto}.input-file{padding:9px;background:#fff}.pagination{display:flex;gap:6px;flex-wrap:wrap;margin-top:14px}.pagination a,.pagination span{padding:8px 11px;border:1px solid var(--borde);border-radius:10px;background:white}.pagination .active{background:var(--azul);color:white}.course-card{border:1px solid var(--borde);border-radius:16px;padding:16px;background:white}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media(max-width:900px){.filters,.two-col{grid-template-columns:1fr}}

/* FASE 8: diseño institucional, rendimiento y modo oscuro */
.topbar{position:relative;justify-content:space-between}.top-actions{margin-left:auto;display:flex;gap:8px;align-items:center;flex-wrap:wrap}.theme-toggle,.mini-link{border:1px solid rgba(255,255,255,.35);background:rgba(255,255,255,.12);color:white;padding:8px 10px;border-radius:999px;font-weight:700;cursor:pointer}.mini-link{font-size:14px}.sidebar a.active,.sidebar a:hover{background:linear-gradient(135deg,var(--azul),#2563eb);color:white}.card h2,.card h3{margin-top:0}.kpi-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.status-ok{color:#166534;font-weight:800}.status-warn{color:#92400e;font-weight:800}.status-bad{color:#991b1b;font-weight:800}.print-only{display:none}.module-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.module-tile{border:1px solid var(--borde);border-radius:18px;padding:18px;background:linear-gradient(180deg,#fff,#f8fafc)}.module-tile strong{display:block;font-size:18px;color:var(--azul)}.help-box{background:#eff6ff;border:1px solid #bfdbfe;border-radius:16px;padding:14px;margin:12px 0}.dark{--gris:#0b1220;--borde:#263449;--texto:#e5e7eb;background:#0b1220;color:#e5e7eb}.dark .card,.dark .metric,.dark .sidebar,.dark .navbar,.dark .course-card,.dark .table,.dark .pagination a,.dark .pagination span,.dark .module-tile{background:#111827;color:#e5e7eb;border-color:#263449}.dark .sidebar a,.dark .navbar a{background:#1f2937;color:#e5e7eb}.dark .input{background:#0b1220;color:#e5e7eb;border-color:#334155}.dark .table th,.dark .table td{border-color:#263449}.dark .muted{color:#94a3b8}.dark .module-tile{background:linear-gradient(180deg,#111827,#0f172a)}@media(max-width:1000px){.kpi-row,.module-grid{grid-template-columns:1fr 1fr}}@media(max-width:700px){.kpi-row,.module-grid{grid-template-columns:1fr}.top-actions{width:100%}.theme-toggle,.mini-link{width:100%;text-align:center}.layout{padding:12px}.container{padding:14px}.card{padding:14px}}@media print{.sidebar,.navbar,.top-actions,.btn,.actions{display:none!important}.layout{display:block;padding:0}.card{box-shadow:none;border:0}.print-only{display:block}.topbar{color:#000;background:#fff;border-bottom:1px solid #ddd}.footer{border-top:1px solid #ddd}}

/* PARCHE FINAL: identidad personal, seguridad y modo oscuro mejorado */
:root{
  --bg:#f6f8fc;
  --surface:#ffffff;
  --surface-2:#f8fafc;
  --text:#0f172a;
  --muted:#475569;
  --border:#dbe3ef;
  --primary:#1e3a8a;
  --primary-2:#294bb0;
  --accent:#f59e0b;
  --accent-2:#fbbf24;
}
body{background:var(--bg);color:var(--text)}
.topbar{background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 58%,#294bb0 100%);box-shadow:0 6px 22px rgba(15,23,42,.18)}
.topbar h1{letter-spacing:.2px}.topbar p{font-weight:500;color:#e0e7ff}.logo-box{box-shadow:0 8px 20px rgba(0,0,0,.12)}
.card,.metric,.sidebar,.course-card{background:var(--surface);border-color:var(--border)}
.hero h2{color:#0f172a}.hero p{color:#334155}.hero-card{background:rgba(255,255,255,.96)}
.btn{background:linear-gradient(135deg,#1e40af,#2563eb)}.btn.secondary{background:linear-gradient(135deg,#f59e0b,#fbbf24);color:#111827}

body.dark{
  --bg:#0b1220;
  --surface:#111827;
  --surface-2:#1f2937;
  --text:#f8fafc;
  --muted:#cbd5e1;
  --border:#334155;
  --primary:#60a5fa;
  --primary-2:#3b82f6;
  --accent:#fbbf24;
  background:var(--bg)!important;
  color:var(--text)!important;
}
.dark .topbar{background:linear-gradient(135deg,#020617 0%,#0f172a 50%,#1d4ed8 100%)}
.dark .topbar h1,.dark .topbar p{color:#ffffff}.dark .topbar p{opacity:.92}
.dark .navbar{background:#0f172a!important;border-color:#1e293b!important}.dark .navbar a{background:#1f2937!important;color:#f8fafc!important}
.dark .sidebar,.dark .card,.dark .metric,.dark .course-card,.dark .table,.dark .module-tile,.dark .pagination a,.dark .pagination span{background:#111827!important;color:#f8fafc!important;border-color:#334155!important}
.dark .sidebar a{background:#1f2937!important;color:#e5e7eb!important}.dark .sidebar a.active,.dark .sidebar a:hover{background:linear-gradient(135deg,#2563eb,#1d4ed8)!important;color:#fff!important}
.dark .hero-card{background:#111827!important;border-color:#334155!important;box-shadow:0 24px 70px rgba(0,0,0,.35)!important}
.dark .hero h2,.dark h1,.dark h2,.dark h3,.dark strong{color:#f8fafc!important}
.dark .hero p,.dark .muted,.dark .footer{color:#cbd5e1!important}
.dark .input{background:#0b1220!important;color:#f8fafc!important;border-color:#475569!important}
.dark .input::placeholder{color:#94a3b8!important}
.dark .btn{background:linear-gradient(135deg,#2563eb,#1d4ed8)!important;color:#fff!important}
.dark .btn.secondary{background:linear-gradient(135deg,#f59e0b,#fbbf24)!important;color:#111827!important}
.dark .btn.light{background:#e5e7eb!important;color:#111827!important}
.dark .table th,.dark .table td{border-color:#334155!important;color:#f8fafc!important}
.dark .metric span{color:#cbd5e1!important}.dark .metric strong{color:#60a5fa!important}
.dark .help-box{background:#0f1f3a!important;border-color:#1d4ed8!important;color:#e0e7ff!important}
.dark .alert{color:#111827!important}.dark .theme-toggle,.dark .mini-link{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.35);color:#fff}