fix: improve modal responsiveness on small screens

Author: Link1515

src/components/Modal.astro

@@ -1,5 +1,5 @@
 <div id="modal" class="pointer-events-none fixed top-0 left-0 z-99999 flex h-full w-full items-center justify-center bg-black/20 px-4 py-8 opacity-0 backdrop-blur-xs transition-opacity duration-300">
-  <div class="flex max-h-full max-w-lg min-w-80 translate-y-5 flex-col rounded-lg bg-white p-4 transition-transform duration-300">
+  <div class="flex max-h-full md:max-w-lg md:min-w-80 translate-y-5 flex-col rounded-lg bg-white p-4 transition-transform duration-300">
     <div class="modal-header mb-6"></div>
     <div class="modal-body overflow-y-auto"></div>
   </div>