:root{
  --bg:#0f1724;
  --card:#0b1220;
  --muted:#9aa6b2;
  --accent:#6ee7b7;
  --glass: rgba(255,255,255,0.03);
  font-family: Inter, Roboto, Arial, sans-serif;
}
*{box-sizing:border-box}
body{
  margin:0;
  background:linear-gradient(180deg,#071023 0%, #07162b 100%);
  color:#e6eef6;
  min-height:100vh;
}
.container{max-width:1000px;margin:0 auto;padding:24px}
.site-header{padding:28px 0;text-align:center}
.site-header h1{margin:0;font-size:28px}
.subtitle{margin:6px 0 18px;color:var(--muted)}
.controls{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.controls input, .controls select{
  padding:10px 12px;border-radius:10px;border:1px solid rgba(255,255,255,0.06);
  background:var(--glass);color:inherit;min-width:220px;
}
.subjects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:18px}
.card{
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:12px;padding:14px;border:1px solid rgba(255,255,255,0.04);
  box-shadow: 0 6px 18px rgba(2,6,23,0.6);
}
.card h2{margin:0;font-size:18px}
.note-list{margin-top:10px;display:flex;flex-direction:column;gap:8px}
.note{
  display:flex;align-items:center;justify-content:space-between;padding:8px;border-radius:8px;
  background:rgba(255,255,255,0.01);font-size:14px;
}
.note .meta{display:flex;align-items:center;gap:10px}
.badge{padding:6px 8px;border-radius:6px;background:rgba(0,0,0,0.35);font-size:12px;color:var(--muted)}
.note a.download{
  text-decoration:none;padding:8px 10px;border-radius:8px;border:1px solid rgba(255,255,255,0.06);
  background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
}
.empty{color:var(--muted);padding:12px;text-align:center}
.site-footer{padding:20px 0;text-align:center;color:var(--muted)}
@media (max-width:420px){.controls input{min-width:160px}}