:root{
  --primary:#0B3D91;
  --accent:#FF6B00;
  --bg:#f5f7fb;
  --text:#111827;
  --muted:#6b7280;
  --white:#ffffff;
  --border:#e5e7eb;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:Arial, sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.5;
}
img{max-width:100%}
a{color:inherit;text-decoration:none}
.container{width:min(1180px, calc(100% - 32px));margin:auto}
.topbar{background:var(--white);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-logo{width:56px;height:56px;object-fit:contain;background:#fff;border-radius:8px}
.brand-title{font-size:20px;font-weight:700}
.brand-tag{font-size:11px;color:var(--muted)}
.nav{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.nav a{font-size:14px}
.menu-toggle{display:none;border:none;background:transparent;font-size:24px}
.hero{
  background:linear-gradient(135deg, #eff6ff 0%, #fff 55%);
  padding:56px 0;
}
.hero-grid,.two-col{display:grid;grid-template-columns:1.3fr 1fr;gap:24px;align-items:start}
.hero h1{font-size:44px;line-height:1.1;margin:12px 0 16px}
.lead{font-size:18px;color:#374151;max-width:800px}
.badge{display:inline-block;background:#dbeafe;color:var(--primary);padding:8px 12px;border-radius:999px;font-size:12px;font-weight:700}
.hero-card,.card{
  background:var(--white);
  border:1px solid var(--border);
  border-radius:18px;
  padding:24px;
  box-shadow:0 10px 30px rgba(2, 6, 23, 0.05);
}
.card-grid{display:grid;gap:18px}
.card-grid-4{grid-template-columns:repeat(4,1fr)}
.card-grid-3{grid-template-columns:repeat(3,1fr)}
.course-card{padding:28px}
.section{padding:56px 0}
.section.alt{background:#f9fafb}
.section-head{margin-bottom:22px}
.page-hero{padding:38px 0 12px;background:#fff}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:8px;padding:12px 18px;border-radius:12px;font-weight:700;border:1px solid transparent
}
.btn-sm{padding:8px 12px;font-size:13px}
.btn-primary{background:var(--primary);color:#fff}
.btn-outline{background:#fff;border-color:var(--primary);color:var(--primary)}
.full{width:100%}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}
.mini-points{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--muted)}
.mini-points span{background:#fff;border:1px solid var(--border);padding:8px 10px;border-radius:999px}
.stack{display:grid;gap:12px}
.stack-lg{display:grid;gap:20px}
input,select,textarea{
  width:100%;padding:14px 15px;border:1px solid #d1d5db;border-radius:12px;background:#fff;font-size:15px
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(11,61,145,0.08)}
.link-card{transition:.2s ease}
.link-card:hover{transform:translateY(-2px);border-color:#c7d2fe}
.footer{background:#0f172a;color:#e5e7eb;margin-top:32px;padding-top:36px}
.footer a{display:block;color:#cbd5e1;margin:8px 0}
.footer-logo{width:90px;background:#fff;padding:8px;border-radius:12px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:22px}
.footer-bottom{display:flex;justify-content:space-between;gap:12px;border-top:1px solid rgba(255,255,255,.12);padding:16px 0 22px;margin-top:20px;font-size:13px;color:#94a3b8}
.list{padding-left:18px}
.muted{color:var(--muted);font-size:14px}
.notice{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;border-radius:12px;padding:14px}
.success{color:#166534}
.error{color:#991b1b}

@media (max-width: 980px){
  .card-grid-4,.card-grid-3,.footer-grid,.hero-grid,.two-col{grid-template-columns:1fr}
  .hero h1{font-size:34px}
}
@media (max-width: 760px){
  .menu-toggle{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:82px;background:#fff;border-bottom:1px solid var(--border);padding:16px;flex-direction:column;align-items:flex-start}
  .nav.open{display:flex}
  .brand-logo{width:48px;height:48px}
  .brand-title{font-size:18px}
}