/* ローディングコンテナ */
.loading-container {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  text-align: center;
}

.spinner-loader {
  position: relative;
  width: 60px;
  height: 60px;
  margin-bottom: 20px;
}

.spinner {
  width: 100%;
  height: 100%;
  border: 4px solid #f3f3f3;
  border-top: 4px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text {
  font-size: 16px;
  color: #666;
  margin-top: 10px;
}

.start-btn {
  background: #3498db;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  margin-top: 20px;
  margin-inline: auto;
  display: block;
}

.start-btn:hover {
  background: #2980b9;
}

/* スピナーアニメーション */
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}