html, body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  display: grid;
  place-items: center;
  min-height: 100vh;
}

.login-box {
  background: #111827;
  border: 1px solid #334155;
  border-radius: 10px;
  padding: 1.5rem;
  width: min(400px, 92vw);
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.login-box h1 { font-size: 1.1rem; margin: 0; }
.login-box p  { color: #94a3b8; font-size: 0.95rem; margin: 0; }

.login-box label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: #cbd5e1;
}

.login-box label.checkbox {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}

.login-box input[type="password"] {
  background: #0b1220;
  color: #e2e8f0;
  border: 1px solid #334155;
  border-radius: 6px;
  padding: 0.55rem 0.75rem;
  font-size: 1rem;
}

.login-box button {
  background: #2563eb;
  color: #fff;
  border: 0;
  border-radius: 6px;
  padding: 0.6rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.login-box button:hover { background: #1d4ed8; }

.login-box .error {
  color: #fca5a5;
  font-size: 0.88rem;
  margin: 0.3rem 0 0;
}

.login-box input[hidden] { display: none; }