.login-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);

  width: 400px;
  height: 400px;
  overflow-y: auto;
  /* 추가된 스타일 */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  /* border: 1px solid red; */
}