/* 부트 스트랩 */
#loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: none; /* 초기에는 숨김 */
  z-index: 9999;
  justify-content: center; /* 수평 가운데 정렬 */
  align-items: center; /* 수직 가운데 정렬 */
}
.spinner-border {
  width: 40px;
  height: 40px;
}

/* 로딩 관련 */
/* 로딩오버레이 */
.loader-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100% !important;
  height: 100% !important;
  background-color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 1s ease-in-out;
}

.loader-content {
  text-align: center;
  color: #333;
}

.spinner-ring {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255);
  border-top: 5px solid #212529;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 20px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* 메인 컨텐츠 */
.main-content {
  opacity: 0;
  visibility: hidden;
  transition: all 300ms ease-in-out;
}

.main-content.show {
  opacity: 1;
  visibility: visible;
}