:root{
  --bg:#f4f7fb;
  --card:#ffffff;
  --ink:#1f2937;
  --muted:#64748b;
  --blue:#2563eb;
  --radius:26px;
  --shadow:0 18px 45px rgba(15,23,42,.12);
  --soft:0 12px 30px rgba(15,23,42,.08);
}

*{box-sizing:border-box}

body{
  margin:0;
  min-height:100vh;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:
    radial-gradient(circle at top left, rgba(37,99,235,.12), transparent 32%),
    linear-gradient(180deg,#f8fbff 0%,var(--bg) 100%);
  color:var(--ink);
}

.page{width:min(1160px,92%);margin:0 auto;padding:42px 0 64px}
.topbar{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:34px}
.brand{display:flex;gap:16px;align-items:flex-start}
.logo{width:64px;height:64px;border-radius:20px;object-fit:cover;box-shadow:var(--soft);background:#fff}
.eyebrow{color:var(--blue);font-weight:900;letter-spacing:.12em;text-transform:uppercase;font-size:.78rem;margin-bottom:10px}
h1{margin:0;font-size:clamp(2.2rem,5vw,4.3rem);line-height:1;letter-spacing:-.05em}
.subtitle{margin:16px 0 0;color:var(--muted);line-height:1.6;max-width:760px;font-size:1.08rem}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.button,.pill{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border:0;background:#fff;color:#334155;padding:11px 16px;border-radius:999px;font-weight:850;box-shadow:0 8px 24px rgba(15,23,42,.08);cursor:pointer}
.button.primary,.pill.primary{background:var(--blue);color:#fff}

.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:36px}
.card{background:var(--card);border-radius:var(--radius);overflow:hidden;text-decoration:none;color:inherit;box-shadow:var(--shadow);min-height:390px;display:flex;flex-direction:column;transition:.22s;border:1px solid rgba(148,163,184,.22)}
.card:hover{transform:translateY(-8px);box-shadow:0 26px 60px rgba(15,23,42,.18)}
.card-media{height:210px;background:#dbeafe;display:grid;place-items:center;font-size:4rem;position:relative;overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;display:block}
.tag{position:absolute;top:16px;left:16px;background:rgba(255,255,255,.88);border-radius:999px;padding:7px 12px;font-weight:800;font-size:.78rem;color:#0f172a;box-shadow:0 6px 18px rgba(15,23,42,.12)}
.card-content{padding:22px;display:flex;flex-direction:column;flex:1}
.course{color:var(--blue);font-size:.82rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em;margin-bottom:8px}
.card h2{margin:0;font-size:1.55rem;letter-spacing:-.03em}
.card p{color:var(--muted);line-height:1.5;margin:12px 0 22px}
.enter{margin-top:auto;font-weight:850;border-top:1px solid #e5e7eb;padding-top:16px;display:flex;justify-content:space-between}

.hero{background:#fff;border-radius:34px;box-shadow:var(--shadow);padding:34px;border:1px solid rgba(148,163,184,.22);display:grid;grid-template-columns:1fr auto;gap:26px;align-items:center;margin-bottom:28px}
.big-icon{width:118px;height:118px;border-radius:32px;background:#f8fafc;display:grid;place-items:center;font-size:4rem;box-shadow:inset 0 0 0 1px #e2e8f0;overflow:hidden}
.big-icon img{width:100%;height:100%;object-fit:cover;display:block}
.notice{background:#eff6ff;color:#1e3a8a;border:1px solid #bfdbfe;border-radius:20px;padding:16px 18px;font-weight:750;line-height:1.5;margin-bottom:22px}
.error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca;border-radius:20px;padding:16px 18px;font-weight:750;line-height:1.5;margin-bottom:22px}
.empty{background:#fff;border-radius:26px;padding:28px;box-shadow:var(--soft);border:1px dashed #cbd5e1;color:var(--muted);line-height:1.6}

.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.video-card{background:#fff;border-radius:28px;overflow:hidden;box-shadow:var(--soft);border:1px solid rgba(148,163,184,.22);display:flex;flex-direction:column}
.video-thumb{display:block;height:210px;background:#dbeafe;overflow:hidden;position:relative}
.video-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:62px;height:62px;border-radius:50%;background:rgba(255,255,255,.92);display:grid;place-items:center;font-size:1.6rem;box-shadow:0 14px 30px rgba(15,23,42,.28)}
.video-content{padding:22px;display:flex;flex-direction:column;flex:1}
.video-content h2{margin:0;font-size:1.28rem;line-height:1.18;letter-spacing:-.03em}
.video-content p{color:var(--muted);line-height:1.5;margin:12px 0 0}
.video-actions{margin-top:auto;padding-top:18px;display:flex;gap:10px;flex-wrap:wrap}

.form-card{background:#fff;border-radius:30px;padding:30px;box-shadow:var(--shadow);border:1px solid rgba(148,163,184,.22)}
label{display:block;font-weight:850;margin:18px 0 8px}
input,select,textarea{width:100%;padding:15px 16px;border-radius:16px;border:1px solid #cbd5e1;font-size:1rem;background:#fff}
textarea{resize:vertical}

.admin-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:32px}
.admin-card{background:#fff;border-radius:28px;padding:28px;min-height:210px;text-decoration:none;color:inherit;box-shadow:var(--shadow);display:flex;flex-direction:column}
.admin-card .icon{font-size:3rem;margin-bottom:18px}
.admin-card h2{margin:0}
.admin-card p{color:var(--muted);line-height:1.55}
.footer-link{margin-top:auto;color:var(--blue);font-weight:900}

.pdf-box{background:#fff;border-radius:30px;padding:24px;box-shadow:var(--soft);border:1px solid rgba(148,163,184,.22)}
.pdf-frame{width:100%;min-height:78vh;border:1px solid #e2e8f0;border-radius:20px;background:#fff}
.table-card{background:#fff;border-radius:28px;padding:22px;box-shadow:var(--shadow);overflow-x:auto}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:14px;border-bottom:1px solid #e5e7eb}
th{color:#64748b;font-size:.82rem;letter-spacing:.08em;text-transform:uppercase}

.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:28px}
.metric-box{background:#fff;border-radius:26px;padding:24px;box-shadow:var(--soft);border:1px solid rgba(148,163,184,.22)}
.metric-number{font-size:2.6rem;line-height:1;font-weight:950;letter-spacing:-.06em}
.metric-label{margin-top:8px;color:#64748b;font-weight:800}
.bars{display:grid;gap:14px}
.bar-row{display:grid;grid-template-columns:120px 1fr 50px;gap:12px;align-items:center}
.bar-bg{height:18px;background:#e2e8f0;border-radius:999px;overflow:hidden}
.bar-fill{height:100%;background:var(--blue);border-radius:999px}

@media(max-width:1050px){.grid{grid-template-columns:repeat(2,1fr)}.video-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:850px){.metric-grid{grid-template-columns:1fr}.bar-row{grid-template-columns:1fr}}
@media(max-width:780px){.admin-grid{grid-template-columns:1fr}.hero{grid-template-columns:1fr}.topbar{flex-direction:column}}
@media(max-width:640px){.page{padding-top:28px}.grid{grid-template-columns:1fr}.video-grid{grid-template-columns:1fr}.card{min-height:auto}}