:root{
  --bg:#162338;
  --card:#1f2f4a;
  --muted:#9fb2c9;
  --text:#e6edf6;
  --accent:#3b82f6;
  --ok:#22c55e;
  --danger:#ff6b81;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;
  background:linear-gradient(180deg,#132033, var(--bg));
  color:var(--text);
  font-size:14px;
}

.shell{max-width:1100px;margin:0 auto;padding:16px}

.topbar{
  display:flex;gap:12px;align-items:center;justify-content:space-between;
  padding:14px 16px;border:1px solid #2c3e5c;
  background:rgba(31,47,74,.92);backdrop-filter: blur(10px);
  border-radius:18px;
}
.brand{cursor:pointer}
.brandTitle{font-size:18px;font-weight:900;letter-spacing:.2px}
.brandSub{font-size:12px;color:var(--muted);margin-top:2px}

.nav{display:flex;gap:10px;flex-wrap:wrap}
.navBtn{
  text-decoration:none;color:var(--text);
  padding:12px 14px;border-radius:14px;
  border:1px solid rgba(255,255,255,.10);
  background:rgba(255,255,255,.06);
  font-weight:850;
}

.card{
  border:1px solid #2c3e5c;
  background:rgba(31,47,74,.92);
  border-radius:18px;
  padding:16px;
}

.muted{color:var(--muted);font-size:13px}
.btn{
  padding:14px 16px;border-radius:16px;border:1px solid rgba(255,255,255,.10);
  background:rgba(59,130,246,.20);color:var(--text);font-weight:900;cursor:pointer
}
.in{
  padding:14px 14px;border-radius:16px;border:1px solid #30476b;
  background:#223454;color:var(--text);font-size:16px;
}

.msg{padding:12px 12px;border-radius:14px;border:1px solid rgba(255,255,255,.10);font-weight:900}
.msg.err{background:rgba(255,107,129,.14)}
.msg.ok{background:rgba(34,197,94,.14)}