body {
  font-family: 'Segoe UI', Tahoma, sans-serif;
  background: #f4f7fa;
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
  margin: 0;
}

.container {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  width: 360px;
}

input[type="text"], input[type="password"] {
  width: 100%;
  padding: 12px;
  margin: 8px 0 16px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

button {
  width: 100%;
  padding: 12px;
  background: #0053ba;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
}

button:hover {
  background: #0041a1;
}

.error {
  color: red;
  margin-bottom: 1rem;
}