Update style.css

style.css

@@ -264,4 +264,57 @@ h3 i {
     .curve-container {
         min-width: 100%;
     }
+}
+.loading-overlay {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background-color: rgba(0, 0, 0, 0.7);
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    z-index: 1000;
+    display: none;
+}
+
+.loading-spinner {
+    border: 5px solid #f3f3f3;
+    border-top: 5px solid var(--primary-color);
+    border-radius: 50%;
+    width: 50px;
+    height: 50px;
+    animation: spin 1s linear infinite;
+    margin-bottom: 15px;
+}
+
+.loading-text {
+    color: white;
+    font-size: 1.2em;
+}
+
+@keyframes spin {
+    0% { transform: rotate(0deg); }
+    100% { transform: rotate(360deg); }
+}
+
+/* 適用ボタンのスタイルを微調整 */
+#apply-btn {
+    background-color: #28a745;
+}
+
+#apply-btn:hover {
+    background-color: #218838;
+}
+
+/* ダウンロードボタンのスタイル調整 */
+#download-btn {
+    background-color: var(--secondary-color);
+    color: white;
+}
+
+#download-btn:hover {
+    background-color: #5a6268;
 }