/* Simple centered card style */
:root{
  --bg-top:#0b1220;
  --bg-bottom:#0f172a;
  --card:#020617;
  --accent:#2563eb;
  --muted:#94a3b8;
  --input-bg:#071023;
}
html,body{height:100%;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial}
body{display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,var(--bg-top),var(--bg-bottom))}
#sign-in-container{width:100%;max-width:520px;padding:24px}
.login-form{background:var(--card);padding:32px;border-radius:12px;box-shadow:0 8px 40px rgba(2,6,23,0.6);display:flex;flex-direction:column;gap:12px;color:var(--muted)}
.login-form h2{margin:0 0 8px 0;font-size:18px;color:#fff}
.login-form input{padding:10px 12px;border:1px solid #0f1726;border-radius:8px;font-size:14px;background:var(--input-bg);color:#e6eef8}
.login-form input::placeholder{color:#6b7280}
.login-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 6px 18px rgba(37,99,235,0.12)}
.actions{display:flex;align-items:center;gap:12px;margin-top:12px}
.btn{background:var(--accent);color:#fff;padding:10px 14px;border-radius:8px;border:none;cursor:pointer}
.btn:hover{filter:brightness(.95)}
.link{color:var(--muted);font-size:13px;text-decoration:none}
@media (max-width:480px){#sign-in-container{padding:12px}}