Improve DocSearch styling

src/css/styles.css

@@ -28,3 +28,48 @@
   --ifm-color-primary-lightest: #4fddbf;
   --docusaurus-highlighted-code-line-bg: rgba(0, 0, 0, 0.3);
 }
+
+/* Reuse the Infima CSS variables to style DocSearch */
+[data-theme='light'] .DocSearch {
+  /* --docsearch-primary-color: var(--ifm-color-primary); */
+  /* --docsearch-text-color: var(--ifm-font-color-base); */
+  --docsearch-muted-color: var(--ifm-color-secondary-darkest);
+  --docsearch-container-background: rgba(94, 100, 112, 0.7);
+  /* Modal */
+  --docsearch-modal-background: var(--ifm-color-secondary-lighter);
+  /* Search box */
+  --docsearch-searchbox-background: var(--ifm-color-secondary);
+  --docsearch-searchbox-focus-background: var(--ifm-color-white);
+  /* Hit */
+  --docsearch-hit-color: var(--ifm-font-color-base);
+  --docsearch-hit-active-color: var(--ifm-color-white);
+  --docsearch-hit-background: var(--ifm-color-white);
+  /* Footer */
+  --docsearch-footer-background: var(--ifm-color-white);
+}
+
+[data-theme='dark'] .DocSearch {
+  --docsearch-text-color: var(--ifm-font-color-base);
+  --docsearch-muted-color: var(--ifm-color-secondary-darkest);
+  --docsearch-container-background: rgba(47, 55, 69, 0.7);
+  /* Modal */
+  --docsearch-modal-background: var(--ifm-background-color);
+  /* Search box */
+  --docsearch-searchbox-background: var(--ifm-background-color);
+  --docsearch-searchbox-focus-background: var(--ifm-color-black);
+  /* Hit */
+  --docsearch-hit-color: var(--ifm-font-color-base);
+  --docsearch-hit-active-color: var(--ifm-color-white);
+  --docsearch-hit-background: var(--ifm-color-emphasis-100);
+  /* Footer */
+  --docsearch-footer-background: var(--ifm-background-surface-color);
+  --docsearch-key-gradient: linear-gradient(
+          -26.5deg,
+          var(--ifm-color-emphasis-200) 0%,
+          var(--ifm-color-emphasis-100) 100%
+  );
+}
+
+.DocSearch-Logo {
+  display: none;
+}