update frontend

frontend/styles.css

@@ -59,6 +59,9 @@ header {
 h1 {
     font-size: 2rem;
     color: var(--primary-color);
+    display: flex;
+    align-items: center;
+    gap: 10px;
 }
 
 .search-box {
@@ -84,13 +87,7 @@ h1 {
     opacity: 0.7;
 }
 
-.actions {
-    display: flex;
-    gap: 10px;
-    flex-wrap: wrap;
-}
-
-.actions button {
+button {
     padding: 8px 16px;
     background-color: var(--primary-color);
     color: white;
@@ -102,21 +99,22 @@ h1 {
     gap: 5px;
 }
 
-.actions button:hover {
+button:hover {
     opacity: 0.9;
 }
 
-.actions button i {
+button i {
     font-size: 0.9rem;
 }
 
-.theme-switcher button {
-    background: none;
-    border: none;
-    color: var(--text-color);
-    font-size: 1.2rem;
-    cursor: pointer;
-    padding: 5px;
+.loading, .error {
+    text-align: center;
+    padding: 20px;
+    color: var(--primary-color);
+}
+
+.error {
+    color: var(--danger-color);
 }
 
 .categories {
@@ -200,12 +198,12 @@ h1 {
     font-size: 12px;
     cursor: pointer;
     display: none;
+    align-items: center;
+    justify-content: center;
 }
 
 .site:hover .delete-btn {
     display: flex;
-    align-items: center;
-    justify-content: center;
 }
 
 /* 模态框样式 */
@@ -269,8 +267,7 @@ h1 {
     gap: 8px;
 }
 
-.form-group input,
-.form-group select {
+.form-group input {
     width: 100%;
     padding: 10px;
     border: 1px solid var(--border-color);
@@ -326,6 +323,9 @@ form button:hover {
     border-radius: 4px;
     padding: 5px 10px;
     cursor: pointer;
+    display: flex;
+    align-items: center;
+    gap: 5px;
 }
 
 .add-category {
@@ -351,51 +351,4 @@ form button:hover {
     cursor: pointer;
     display: flex;
     align-items: center;
-    gap: 5px;
-}
-
-/* 拖拽样式 */
-.sortable-ghost {
-    opacity: 0.5;
-    background: var(--primary-color);
-}
-
-.sortable-chosen {
-    box-shadow: 0 0 10px var(--shadow-color);
-}
-
-/* 响应式设计 */
-@media (max-width: 768px) {
-    header {
-        flex-direction: column;
-        align-items: stretch;
-        gap: 15px;
-    }
-    
-    .header-left, .header-right {
-        flex-direction: column;
-        align-items: stretch;
-        gap: 15px;
-    }
-    
-    .search-box {
-        width: 100%;
-    }
-    
-    .actions {
-        justify-content: space-between;
-    }
-    
-    .actions button {
-        flex-grow: 1;
-        justify-content: center;
-    }
-    
-    .sites {
-        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
-    }
-    
-    .add-category {
-        flex-direction: column;
-    }
-}
+    gap: 5px;