:root{
  --bg:#0b1220;
  --panel:#0f172a;
  --muted:#64748b;
  --text:#e5e7eb;
  --brand:#6366f1;
  --brand-2:#8b5cf6;
  --danger:#ef4444;
}
*{box-sizing:border-box}
html,body{height:100%;}
body{
  margin:0;
  color:var(--text);
  font: 15px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, "Helvetica Neue", Arial, "Noto Sans";
  display:grid; place-items:center;
  padding:24px;
  background:
    radial-gradient(1200px 800px at 10% -10%, rgba(99,102,241,.25), transparent 60%),
    radial-gradient(1000px 900px at 110% 110%, rgba(139,92,246,.2), transparent 60%),
    url('login-bg.jpg') center/cover no-repeat,
    var(--bg);
}
.card{
  width:min(440px, 92vw);
  background:linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.04));
  border:1px solid rgba(255,255,255,.10);
  backdrop-filter: blur(10px);
  border-radius:20px;
  padding:28px;
  box-shadow: 0 18px 60px rgba(0,0,0,.45);
}
.brand{display:flex; align-items:center; gap:14px; margin-bottom:16px;}
.brand__logo{
  width:48px;height:48px;border-radius:14px; overflow:hidden; display:grid;place-items:center;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow:0 10px 22px rgba(99,102,241,.35);
}
.brand__logo img{width:100%;height:100%;display:block;object-fit:cover}
.brand__name{font-weight:800; font-size:20px; letter-spacing:.3px}
h1{margin:6px 0 2px; font-size:22px;}
p.lead{margin:0 0 16px; color:var(--muted)}
.form{display:grid; gap:14px; margin-top:10px;}
.input{
  background:#0b1020;
  border:1px solid rgba(255,255,255,.12);
  color:var(--text);
  padding:12px 14px;
  border-radius:12px;
  outline:none;
  width:100%;
  transition:border-color .15s, box-shadow .15s;
}
.input:focus{ border-color:var(--brand); box-shadow:0 0 0 3px rgba(99,102,241,.25)}
.input.invalid{ border-color: var(--danger); box-shadow:0 0 0 3px rgba(239,68,68,.25) }
.error-msg{color:#fecaca; font-size:12px; margin-top:6px}
.row{display:grid; grid-template-columns:1fr auto; gap:10px; align-items:center;}
.btn{
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color:#fff; border:none; border-radius:12px; padding:12px 16px; font-weight:700; cursor:pointer;
  box-shadow: 0 10px 22px rgba(99,102,241,.35);
}
.btn:disabled{opacity:.5; cursor:not-allowed}
.help{font-size:12px; color:var(--muted); text-align:center; margin-top:10px}
.error{
  background:rgba(239,68,68,.12);
  color:#fecaca;
  border:1px solid rgba(239,68,68,.35);
  padding:10px 12px; border-radius:12px; margin-bottom:10px;
}
.toggle{
  background:#0b1020;border:1px solid rgba(255,255,255,.12);
  color:var(--muted); padding:10px 12px; border-radius:12px; cursor:pointer;
}
.actions{display:flex;align-items:center;justify-content:space-between;margin-top:4px}
.remember{display:flex;align-items:center;gap:8px;color:#cbd5e1;font-size:13px}
small.credits{display:block;opacity:.6;margin-top:14px;text-align:center;font-size:12px}