:root{
  --bg:#f6f7fb; --card:#ffffff; --text:#0f172a; --muted:#64748b; --line:#e2e8f0;
  --brand:#2563eb; --brand2:#16a34a; --danger:#dc2626; --warning:#f59e0b;
  --shadow: 0 10px 30px rgba(2,6,23,.08); --radius:18px; --max:1120px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;background:var(--bg);color:var(--text)}
a{color:inherit;text-decoration:none}
.container{max-width:var(--max);margin:0 auto;padding:18px}
.topbar{position:sticky;top:0;z-index:40;background:rgba(246,247,251,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar .row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 18px;max-width:var(--max);margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.2px}
.brand-badge{width:36px;height:36px;border-radius:12px;background:linear-gradient(135deg,var(--brand),#60a5fa);display:grid;place-items:center;color:#fff;font-weight:900;box-shadow:var(--shadow)}
.nav{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.pill{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:14px;color:var(--muted)}
.pill strong{color:var(--text)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 14px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;font-weight:700;font-size:14px}
.btn.primary{background:var(--brand);color:#fff;border-color:transparent}
.btn.success{background:var(--brand2);color:#fff;border-color:transparent}
.btn.danger{background:var(--danger);color:#fff;border-color:transparent}
.btn:active{transform:translateY(1px)}
.grid{display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:860px){.grid.cols-2{grid-template-columns:1.3fr .7fr}.grid.cols-3{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.card .pad{padding:16px}
.h1{font-size:28px;line-height:1.15;margin:0 0 8px}
.h2{font-size:18px;margin:0 0 8px}
.muted{color:var(--muted)}
.flash{padding:12px 14px;border-radius:14px;border:1px solid var(--line);background:#fff;margin:12px 0;display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.flash.ok{border-color:rgba(22,163,74,.25);background:rgba(22,163,74,.07)}
.flash.err{border-color:rgba(220,38,38,.25);background:rgba(220,38,38,.07)}
.flash .x{cursor:pointer;opacity:.6}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:12px}
.label{font-weight:800;font-size:13px}
input,textarea,select{padding:12px;border-radius:12px;border:1px solid var(--line);background:#fff;font-size:14px;outline:none}
textarea{min-height:120px;resize:vertical}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.row>*{flex:1;min-width:220px}
.table{width:100%;border-collapse:separate;border-spacing:0;border-radius:14px;border:1px solid var(--line);background:#fff;overflow:hidden}
.table th,.table td{padding:12px;text-align:left;border-bottom:1px solid var(--line);font-size:14px;vertical-align:top}
.table th{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.table tr:last-child td{border-bottom:none}
.badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;font-size:12px;border:1px solid var(--line);background:#fff;color:var(--muted);font-weight:800}
.badge.green{background:rgba(22,163,74,.10);border-color:rgba(22,163,74,.25);color:#166534}
.badge.blue{background:rgba(37,99,235,.10);border-color:rgba(37,99,235,.25);color:#1e40af}
.badge.orange{background:rgba(245,158,11,.12);border-color:rgba(245,158,11,.25);color:#92400e}
.badge.red{background:rgba(220,38,38,.10);border-color:rgba(220,38,38,.25);color:#991b1b}
.course-thumb{width:100%;height:160px;object-fit:cover;border-bottom:1px solid var(--line);background:linear-gradient(135deg,rgba(37,99,235,.15),rgba(22,163,74,.10))}
.kpis{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
@media(min-width:860px){.kpis{grid-template-columns:repeat(4,1fr)}}
.kpi{padding:14px;border-radius:16px;border:1px solid var(--line);background:#fff}
.kpi .n{font-weight:900;font-size:22px}
.kpi .t{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.video{width:100%;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#000;aspect-ratio:16/9}
.video iframe,.video video{width:100%;height:100%;border:0;display:block}
.footer{color:var(--muted);padding:18px;text-align:center;font-size:13px}