body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.login-box {
  background: #fff;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
  width: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.login-box h1 {
  margin-bottom: 28px;
  font-size: 1.4rem;
  color: #4a90e2;
}

.login-box input {
  display: block;
  width: 100%;
  padding: 10px;
  margin-bottom: 14px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
}

.login-box input:focus {
  outline: none;
  border-color: #4a90e2;
}

.login-box button {
  width: 100%;
  padding: 10px;
  background: #4a90e2;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  cursor: pointer;
}

.login-box button:hover {
  background: #357abd;
}

#login-error {
  color: red;
  margin-top: 12px;
  font-size: 0.9rem;
  min-height: 1.2em;
}