:root{
  --bg:#eef4ff;
  --bg2:#f8fbff;
  --white:rgba(255,255,255,.84);
  --white-strong:rgba(255,255,255,.94);
  --text:#101828;
  --muted:#667085;
  --line:rgba(16,24,40,.08);
  --blue:#2563eb;
  --shadow:0 20px 55px rgba(15,23,42,.08);
  --shadow-soft:0 10px 28px rgba(15,23,42,.06);
  --max:1380px;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:Arial,Helvetica,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at top left, rgba(37,99,235,.08), transparent 24%),
    linear-gradient(180deg,var(--bg2),var(--bg));
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
.shell{width:min(calc(100% - 36px), var(--max));margin:0 auto}
.narrow{width:min(calc(100% - 36px), 920px);margin:0 auto}
.site-header{position:sticky;top:10px;z-index:1000;padding-top:14px}
.header-shell{
  min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:14px 18px;background:rgba(255,255,255,.58);backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.6);border-radius:22px;box-shadow:var(--shadow)
}
.brand{font-size:30px;font-weight:800;letter-spacing:-.03em}
.brand span{color:var(--blue)}
.main-nav{display:flex;gap:8px;align-items:center;flex:1;justify-content:center}
.main-nav a{padding:12px 16px;border-radius:999px;font-weight:600;color:#334155}
.main-nav a:hover{background:rgba(255,255,255,.72)}
.cta-btn,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 22px;border-radius:999px;font-weight:700}
.cta-btn,.btn-primary{background:linear-gradient(180deg,#2f6fff,#1e5ceb);color:#fff;box-shadow:0 12px 24px rgba(37,99,235,.24)}
.btn-secondary{background:rgba(255,255,255,.88);border:1px solid var(--line);color:var(--text)}
.hero{padding:22px 0 8px}
.hero-image-wrap{
  width:100%;background:var(--white-strong);border:1px solid rgba(255,255,255,.7);
  border-radius:32px;box-shadow:var(--shadow);overflow:hidden
}
.hero-image{width:100%;max-height:560px;object-fit:cover;object-position:center}
.hero-copy{padding:30px 0 8px}
.center-copy{text-align:center}
.eyebrow{display:inline-flex;padding:10px 16px;border-radius:999px;background:rgba(37,99,235,.10);color:#1d4ed8;font-size:14px;font-weight:800;margin-bottom:18px}
.hero-copy h1,.page-hero h1{margin:0;font-size:clamp(42px,5vw,76px);line-height:.98;letter-spacing:-.045em}
.hero-copy p,.page-hero p{margin:18px auto 0;max-width:900px;color:var(--muted);font-size:21px;line-height:1.6}
.hero-actions{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap}
.centered-actions{justify-content:center}
.section{padding:42px 0 6px}
.section.soft{padding-bottom:46px}
.section-head{margin-bottom:22px;text-align:center}
.section-head.left{text-align:left}
.section-head h2{margin:0 0 8px;font-size:clamp(30px,3vw,48px);line-height:1.02;letter-spacing:-.035em}
.section-head p{margin:0;color:var(--muted);font-size:18px}
.card-grid{display:grid;gap:18px}
.two-up{grid-template-columns:repeat(2,1fr)}
.info-card{background:var(--white);border:1px solid rgba(255,255,255,.72);border-radius:26px;padding:26px;box-shadow:var(--shadow-soft)}
.small-card{text-align:left}
.pill{display:inline-flex;min-height:34px;align-items:center;padding:0 12px;border-radius:999px;background:rgba(37,99,235,.08);color:#1d4ed8;font-size:13px;font-weight:800;margin-bottom:14px}
.info-card h2,.info-card h3{margin:0 0 10px;font-size:28px;line-height:1.08;letter-spacing:-.03em}
.info-card p{margin:0;color:var(--muted);font-size:17px;line-height:1.65}
.page-hero{padding:38px 0 8px;text-align:center}
.course-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.cta-panel{margin-top:22px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 26px;background:rgba(255,255,255,.88);border:1px solid rgba(255,255,255,.72);border-radius:26px;box-shadow:var(--shadow-soft)}
.cta-panel h2{margin:0 0 8px;font-size:32px;line-height:1.05}
.cta-panel p{margin:0;color:var(--muted)}
.faq-list{display:grid;gap:16px}
.faq-item{background:rgba(255,255,255,.84);border:1px solid rgba(255,255,255,.72);border-radius:20px;padding:22px;box-shadow:var(--shadow-soft)}
.faq-item h3{margin:0 0 8px;font-size:22px}
.faq-item p{margin:0;color:var(--muted);line-height:1.6}
.site-footer{border-top:1px solid var(--line);padding:20px 0 30px;margin-top:36px}
.footer-shell{display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:14px}
.footer-links{display:flex;gap:14px;flex-wrap:wrap}

/* admin */
.admin-body{background:#eef4ff}
.admin-shell{display:grid;grid-template-columns:260px 1fr;min-height:100vh}
.admin-sidebar{background:#0f172a;color:#fff;padding:24px}
.admin-brand{display:block;font-size:24px;font-weight:800;margin-bottom:24px}
.admin-nav{display:flex;flex-direction:column;gap:8px}
.admin-nav a{padding:10px 12px;border-radius:12px;color:#cbd5e1}
.admin-nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.admin-content{padding:26px}
.admin-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.admin-card{background:#fff;border-radius:18px;padding:20px;box-shadow:var(--shadow-soft)}
.admin-card strong{display:block;color:#475467;margin-bottom:8px}
.admin-card span{font-size:34px;font-weight:800}
.admin-form{background:#fff;border-radius:22px;padding:20px;box-shadow:var(--shadow-soft);margin-bottom:20px}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.form-grid .full{grid-column:1 / -1}
label{display:block;font-weight:700;margin-bottom:8px}
input[type=text],input[type=email],input[type=password],input[type=number],select,textarea{
  width:100%;padding:12px 14px;border:1px solid #d0d5dd;border-radius:14px;font:inherit;background:#fff
}
textarea{min-height:110px;resize:vertical}
.admin-table{width:100%;border-collapse:collapse;background:#fff;border-radius:22px;overflow:hidden;box-shadow:var(--shadow-soft)}
.admin-table th,.admin-table td{padding:14px 16px;border-bottom:1px solid #eaecf0;text-align:left;vertical-align:top}
.admin-table th{background:#f8fafc}
.flash{padding:14px 16px;border-radius:14px;margin-bottom:16px}
.flash-success{background:#ecfdf3;color:#067647}
.flash-error{background:#fef3f2;color:#b42318}
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(180deg,var(--bg2),var(--bg))}
.login-card{width:min(100% - 24px, 460px);background:#fff;padding:28px;border-radius:24px;box-shadow:var(--shadow)}
.full-width{width:100%}

@media (max-width:980px){
  .header-shell{flex-wrap:wrap;justify-content:center}
  .brand{width:100%;text-align:center}
  .main-nav{width:100%;flex-wrap:wrap}
  .cta-btn{width:100%}
  .two-up,.course-grid,.admin-cards,.form-grid,.admin-shell{grid-template-columns:1fr}
}
@media (max-width:640px){
  .shell,.narrow{width:min(calc(100% - 20px), 1380px)}
  .site-header{top:6px;padding-top:8px}
  .header-shell{padding:12px 14px;border-radius:18px}
  .main-nav a{width:100%;text-align:center}
  .hero-copy p,.page-hero p{font-size:18px}
  .hero-image{max-height:320px}
  .btn,.cta-btn{width:100%}
  .footer-shell{flex-direction:column;text-align:center}
}