feat: support non-singleton search

quartz/components/styles/search.scss

@@ -42,7 +42,7 @@
     }
   }
 
-  & > #search-container {
+  & > .search-container {
     position: fixed;
     contain: layout;
     z-index: 999;
@@ -58,7 +58,7 @@
       display: inline-block;
     }
 
-    & > #search-space {
+    & > .search-space {
       width: 65%;
       margin-top: 12vh;
       margin-left: auto;
@@ -91,7 +91,7 @@
         }
       }
 
-      & > #search-layout {
+      & > .search-layout {
         display: none;
         flex-direction: row;
         border: 1px solid var(--lightgray);
@@ -102,7 +102,7 @@
           display: flex;
         }
 
-        &[data-preview] > #results-container {
+        &[data-preview] > .results-container {
           flex: 0 0 min(30%, 450px);
         }
 
@@ -150,7 +150,7 @@
           scroll-margin-top: 2rem;
         }
 
-        & > #preview-container {
+        & > .preview-container {
           flex-grow: 1;
           display: block;
           overflow: hidden;
@@ -171,7 +171,7 @@
           }
         }
 
-        & > #results-container {
+        & > .results-container {
           overflow-y: auto;
 
           & .result-card {