body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;margin:0;background:#f7f7fb;color:#111}
.container{max-width:1100px;margin:0 auto;padding:18px}
.topbar{
  background:#fff;
  border-bottom:1px solid #e8e8ef;
  padding:10px 0;
}

.topbar .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.nav{
  display:flex;
  gap:16px;
  align-items:center;
}

.nav a{
  text-decoration:none;
  color:#111;
  font-weight:500;
}
.brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:#111}
.nav{display:flex;gap:14px;align-items:center}
.nav a{text-decoration:none;color:#111}
.btn{display:inline-block;padding:10px 14px;border-radius:10px;background:#111;color:#fff;text-decoration:none;border:0}
.btn.ghost{background:transparent;color:#111;border:1px solid #ddd}
.hero{padding:22px;background:#fff;border:1px solid #eee;border-radius:16px;margin-top:10px}
.hero-actions{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}
.card{background:#fff;border:1px solid #eee;border-radius:16px;padding:14px}
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
label{display:block;margin-top:10px;margin-bottom:6px;font-weight:600}
input{width:100%;padding:10px;border:1px solid #ddd;border-radius:12px}
.alert{background:#fff3f3;border:1px solid #ffd0d0;padding:10px;border-radius:12px}
.footer{margin-top:28px;background:#fff;border-top:1px solid #e8e8ef}
.footer-row{display:flex;gap:12px;align-items:center;padding:14px}
@media(max-width:900px){.cards,.course-grid{grid-template-columns:1fr}}