feat: responsive header, search boxes (#10)

src/hooks/useMediaQuery.tsx

@@ -0,0 +1,19 @@
+import * as React from "react"
+
+export function useMediaQuery(query: string) {
+  const [value, setValue] = React.useState(false)
+
+  React.useEffect(() => {
+    function onChange(event: MediaQueryListEvent) {
+      setValue(event.matches)
+    }
+
+    const result = matchMedia(query)
+    result.addEventListener("change", onChange)
+    setValue(result.matches)
+
+    return () => result.removeEventListener("change", onChange)
+  }, [query])
+
+  return value
+}