/* 全螢幕載入 Spinner 樣式 */
.fullscreen-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 99999;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.fullscreen-loader.active {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

.spinner-container {
  text-align: center;
  padding: 25px;
  border-radius: 15px;
  background-color: rgba(0, 0, 0, 0.6);
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  max-width: 85%;
}

.fullscreen-loader.active .spinner-container {
  transform: scale(1);
}

.spinner {
  width: 60px;
  height: 60px;
  margin: 0 auto;
  position: relative;
}

/* 現代雙圈 spinner 設計 */
.spinner:before,
.spinner:after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 4px solid transparent;
}

.spinner:before {
  border-top-color: #4a6bff;
  border-right-color: #4a6bff;
  animation: spin 1s cubic-bezier(0.42, 0, 0.58, 1) infinite;
}

.spinner:after {
  border-bottom-color: #ffffff;
  border-left-color: #ffffff;
  animation: spin 1.5s cubic-bezier(0.42, 0, 0.58, 1) infinite reverse;
}

/* 隱藏文字和點狀動畫 */
.spinner-text {
  display: none;
}

.dot-pulse {
  display: none;
}

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

/* 響應式調整 */
@media (max-width: 768px) {
  .spinner-container {
    padding: 20px;
  }
  
  .spinner {
    width: 50px;
    height: 50px;
  }
}