.w-250-px {
  width: 250px;
}

.h-80-vh {
  height: 80vh;
}

.btn-primary {
  color: #FFF !important;
}

.btn-outline-primary:hover {
  color: #FFF !important;
}

/* 學生資料載入遮罩樣式 */
#studentDataLoadingOverlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  backdrop-filter: blur(3px);
  opacity: 1;
  transition: opacity 0.3s ease-out;
}

#studentDataLoadingOverlay.fade-out {
  opacity: 0;
}

#studentDataLoadingOverlay .loading-content {
  text-align: center;
}

#studentDataLoadingOverlay .loading-message {
  margin-top: 1.5rem;
  font-size: 1.2rem;
  color: #333;
  font-weight: 500;
}

#studentDataLoadingOverlay .loading-progress {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: #666;
}

#studentDataLoadingOverlay .spinner-border {
  width: 4rem;
  height: 4rem;
  border-width: 0.4em;
}