:root { --bg1:#0b1220; --bg2:#0f1a33; --card:#111b33; --txt:#e8eefc; --mut:#9fb0d0; --acc:#3aa0ff; --err:#ff4d4d; }
*{ box-sizing:border-box; font-family:system-ui, -apple-system, Segoe UI, Roboto, Arial; }
body{ margin:0; color:var(--txt); }
.bg{
  min-height:100vh;
  background: radial-gradient(1200px 800px at 10% 10%, #14224a 0%, transparent 60%),
              radial-gradient(900px 700px at 90% 20%, #1b2a5c 0%, transparent 55%),
              linear-gradient(180deg, var(--bg1), var(--bg2));
  display:flex; align-items:center; justify-content:center;
  padding:20px;
}
.card{
  width:420px; max-width:100%;
  background:rgba(17,27,51,.92);
  border:1px solid rgba(255,255,255,.08);
  border-radius:16px;
  padding:22px;
  box-shadow:0 20px 60px rgba(0,0,0,.45);
}
h1{ margin:0 0 6px; font-size:24px; }
label{ display:block; margin:12px 0 6px; color:var(--mut); font-size:13px; }
input{
  width:100%; padding:12px 12px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.10);
  background:#0c142b;
  color:var(--txt);
  outline:none;
}
button{
  width:100%; margin-top:14px;
  padding:12px 14px;
  border-radius:12px;
  border:none;
  background:var(--acc);
  color:#071021;
  font-weight:700;
  cursor:pointer;
}
.alert{
  margin:12px 0;
  padding:10px 12px;
  border-radius:12px;
  background:rgba(255,77,77,.12);
  border:1px solid rgba(255,77,77,.35);
  color:#ffd0d0;
}
.muted{ color:var(--mut); font-size:13px; }
.foot{ margin-top:14px; text-align:center; }

.topbar{
  position:fixed; top:0; left:0; right:0;
  padding:14px 18px;
  background:rgba(10,16,32,.6);
  border-bottom:1px solid rgba(255,255,255,.08);
  backdrop-filter: blur(10px);
  display:flex; align-items:center; justify-content:space-between;
}
.container{ width:100%; max-width:1100px; padding:90px 20px 30px; }
.panel{
  background:rgba(17,27,51,.92);
  border:1px solid rgba(255,255,255,.08);
  border-radius:16px;
  padding:18px;
}
.btnlink{
  display:inline-block;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.12);
  color:var(--txt);
  text-decoration:none;
}