Update Search component styles for layout improvements

Author: kylemclaren

src/components/Search.astro

@@ -54,6 +54,7 @@ import SearchDialogWrapper from './react/SearchDialogWrapper';
     align-items: center;
     gap: 0.5rem;
     padding: 0.375rem 0.75rem;
+    min-width: 12rem;
     background: var(--sl-color-gray-6);
     border: 1px solid var(--sl-color-hairline);
     border-radius: 0.375rem;
@@ -90,7 +91,7 @@ import SearchDialogWrapper from './react/SearchDialogWrapper';
     align-items: center;
     gap: 0.125rem;
     padding: 0.125rem 0.375rem;
-    margin-left: 0.5rem;
+    margin-left: auto;
     font-size: 0.625rem;
     font-family: var(--sl-font-system-mono);
     color: var(--sl-color-gray-3);