diff --git a/src/components/Card.tsx b/src/components/Card.tsx
index e476147..d73d2d1 100644
--- a/src/components/Card.tsx
+++ b/src/components/Card.tsx
@@ -1,7 +1,9 @@
 "use client";
 
+import React from "react";
 import { type IPaper } from "@/interface";
 import Image from "next/image";
+import { X } from "lucide-react";
 import { Eye, Download, Check } from "lucide-react";
 import {
   extractBracketContent,
@@ -13,16 +15,18 @@ import {
   downloadFile,
 } from "@/lib/utils/download";
 import { Capsule } from "@/components/ui/capsule";
-import Link from "next/link";
 import { cn } from "@/lib/utils";
 
 interface CardProps {
   paper: IPaper;
   onSelect: (paper: IPaper, isSelected: boolean) => void;
   isSelected: boolean;
+  isShow?: boolean;
 }
 
-const Card = ({ paper, onSelect, isSelected }: CardProps) => {
+const Card = ({ paper, onSelect, isSelected, isShow=true }: CardProps) => {
+  const [previewOpen, setPreviewOpen] = React.useState(false);
+  const [iframeLoading, setIframeLoading] = React.useState(true);
   const handleDownload = async (paper: IPaper) => {
     await downloadFile(getSecureUrl(paper.file_url), generateFileName(paper));
   };
@@ -34,76 +38,124 @@ const Card = ({ paper, onSelect, isSelected }: CardProps) => {
   const paperLink = `/paper/${paper._id}`;
 
   return (
-    <div
-      className={cn(
-        "overflow-hidden rounded-sm border-2 border-[#734DFF] bg-[#FFFFFF] font-play transition-all duration-150 hover:bg-[#EFEAFF] dark:border-[#36266D] dark:bg-[#171720] hover:dark:bg-[#262635]",
-        isSelected && "bg-white",
-      )}
-    >
-      <Link href={paperLink} target="_blank" rel="noopener noreferrer">
-        <Image
-          src={paper.thumbnail_url}
-          alt={paper.subject}
-          width={320}
-          height={180}
-          className="w-full object-cover p-4 pb-3 md:h-[250px]"
-        />
+    <>
+      <div
+        onClick={(e) => {
+  const target = e.target as HTMLElement;
 
-        <div className="justify-center">
-          <div className="flex flex-row items-center justify-between px-4 pb-2">
-            <div className="text-md font-play font-medium">
-              {extractBracketContent(paper.subject)}
-            </div>
-            <div className="flex gap-2">
-              <Link href={paperLink} target="_blank" rel="noopener noreferrer">
-                <Eye size={22} />
-              </Link>
-              <Download
-                size={20}
-                onClick={(e) => {
-                  e.preventDefault();
-                  e.stopPropagation();
-                  void handleDownload(paper);
-                }}
-                className="cursor-pointer"
-              />
+  if (target.closest("button, input, svg")) return;
+
+  window.open(paperLink, "_blank");
+}}
+        className={cn(
+          "cursor-pointer overflow-hidden rounded-sm border-2 border-[#734DFF] bg-[#FFFFFF] font-play transition-all duration-150 hover:bg-[#EFEAFF] dark:border-[#36266D] dark:bg-[#171720] hover:dark:bg-[#262635]",
+          isSelected && "ring-2 ring-[#7480FF] bg-[#EFEAFF]"
+        )}
+      >
+          <Image
+            src={paper.thumbnail_url}
+            alt={paper.subject}
+            width={320}
+            height={180}
+            className="w-full object-cover p-4 pb-3 md:h-[250px]"
+          />
+          <div className="justify-center">
+            <div className="flex flex-row items-center justify-between px-4 pb-2">
+              <div className="text-md font-play font-medium">
+                {extractBracketContent(paper.subject)}
+              </div>
             </div>
-          </div>
 
-          <div className="h-[1px] w-full bg-[#734DFF] dark:bg-[#36266D]" />
+            <div className="h-[1px] w-full bg-[#734DFF] dark:bg-[#36266D]" />
 
-          <div className="space-y-2 p-4">
-            <div className="font-play text-lg font-semibold">
-              {extractWithoutBracketContent(paper.subject)}
-            </div>
-            <div className="flex flex-wrap gap-2">
-              <Capsule>{paper.exam}</Capsule>
-              <Capsule>{paper.slot}</Capsule>
-              <Capsule>{paper.year}</Capsule>
-              <Capsule>{paper.semester}</Capsule>
+            <div className="space-y-2 p-4">
+              <div className="font-play text-lg font-semibold">
+                {extractWithoutBracketContent(paper.subject)}
+              </div>
+              <div className="flex flex-wrap gap-2">
+                <Capsule>{paper.exam}</Capsule>
+                <Capsule>{paper.slot}</Capsule>
+                <Capsule>{paper.year}</Capsule>
+                <Capsule>{paper.semester}</Capsule>
+              </div>
             </div>
           </div>
-        </div>
-      </Link>
 
-      <div className="flex items-center justify-between gap-2 px-4 pb-4 font-play">
-        <div className="flex items-center gap-2">
-          <input
-            checked={isSelected}
-            onChange={handleCheckboxChange}
-            className="h-5 w-5 accent-[#7480FF]"
-            type="checkbox"
+        <div className="flex justify-end gap-2 px-4 pb-2">
+          <Eye
+           className="cursor-pointer transition-all duration-200 ease-out hover:scale-110"
+              onClick={(e) => {
+                e.stopPropagation();
+                setIframeLoading(true); 
+                setPreviewOpen(true);
+              }}
+            />
+
+          <Download
+            size={20}
+            onClick={(e) => {
+              e.stopPropagation();
+              void handleDownload(paper);
+            }}
+            className="cursor-pointer"
           />
-          <p>Select</p>
         </div>
-        {paper.answer_key_included && (
-          <div className="flex items-center gap-2 font-normal text-[#7480FF]">
-            <Check color="#7480FF" />
-            Answer Key
-          </div>
-        )}
+         
+        <div className="flex items-center justify-between gap-2 px-4 pb-4 font-play">
+          {isShow && <div className="flex items-center gap-2">
+            <input
+              checked={isSelected}
+              onChange={(e) => {
+                e.stopPropagation();
+                handleCheckboxChange();
+              }}
+              onClick={(e) => e.stopPropagation()}
+              className="h-5 w-5 accent-[#7480FF]"
+              type="checkbox"
+            />
+            <p>Select</p>
+          </div>}
+
+          {paper.answer_key_included && (
+            <div className="flex items-center gap-2 font-normal text-[#7480FF]">
+              <Check color="#7480FF" />
+              Answer Key
+            </div>
+          )}
+        </div>
       </div>
+
+      {previewOpen && (
+        <div
+          className="fixed inset-0 z-50 flex items-center justify-center bg-black/80"
+          onClick={() => setPreviewOpen(false)}
+        >
+          <div
+            className="relative w-[95%] max-w-5xl h-[90vh] rounded-lg bg-white p-2 dark:bg-[#171720]"
+            onClick={(e) => e.stopPropagation()}
+          >
+            <div
+              className={`absolute inset-0 z-50 flex items-center justify-center bg-[#070114] transition-opacity duration-300 ${
+                iframeLoading ? "opacity-100" : "opacity-0 pointer-events-none"
+              }`}
+            >
+      <div className="w-7 h-7 rounded-full border-2 border-white/20 border-t-white animate-spin" />
     </div>
+          <button
+            className="absolute top-3 left-6 z-50 p-2 rounded-full bg-black/60 text-white hover:bg-black transition"
+            onClick={() => setPreviewOpen(false)}
+          >
+            <X size={18} />
+          </button>
+            <iframe
+              src={`${getSecureUrl(paper.file_url)}#toolbar=0`}
+              className="w-full h-full rounded-md"
+              onLoad={() => setIframeLoading(false)}
+            />
+          </div>
+        </div>
+      )}
+    </>
   );
 };
 
diff --git a/src/components/RelatedPaper.tsx b/src/components/RelatedPaper.tsx
index 18f040d..447be7c 100644
--- a/src/components/RelatedPaper.tsx
+++ b/src/components/RelatedPaper.tsx
@@ -90,7 +90,7 @@ const RelatedPapers = () => {
       {relatedPapers.length === 0 ? (
         <p className="font-play">No related papers found.</p>
       ) : (
-        <div className="grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-4">
+        <div className=" cursor-pointer grid grid-cols-1 gap-4 sm:grid-cols-2 lg:grid-cols-4">
           {relatedPapers.map((paper) => (
             <Card
               key={paper._id}
@@ -99,6 +99,7 @@ const RelatedPapers = () => {
                 ("");
               }}
               isSelected={false}
+              isShow={false}
             />
           ))}
         </div>
diff --git a/src/components/SideBar.tsx b/src/components/SideBar.tsx
index 7ff5a06..f5dc1cf 100644
--- a/src/components/SideBar.tsx
+++ b/src/components/SideBar.tsx
@@ -17,7 +17,6 @@ function SideBar() {
     selectedAnswerKeyIncluded,
     filterOptions,
     handleApplyFilters,
-    setCurrentPage,
   } = useFilters();
   const exams =
     filterOptions?.unique_exams.map((exam) => ({ label: exam, value: exam })) ??
diff --git a/src/components/SidebarSection.tsx b/src/components/SidebarSection.tsx
index 1247edc..80d19b7 100644
--- a/src/components/SidebarSection.tsx
+++ b/src/components/SidebarSection.tsx
@@ -21,35 +21,45 @@ const SidebarSection: React.FC<SidebarSectionProps> = ({
   data,
   selected,
   updater,
-}) => (
-  <div className="flex w-full flex-col items-baseline justify-between border-b-2 border-[#36266d] px-[10px]">
-    <Accordion className="w-full" type="single" collapsible>
-      <AccordionItem className="border-none no-underline" value={label}>
-        <AccordionTrigger className="w-full no-underline">
-          <div className="font-play text-sm no-underline">{label}</div>
-        </AccordionTrigger>
-        <AccordionContent>
-          <div className="my-2 flex w-full flex-wrap items-center">
-            {data.map((item) => (
-              <SidebarButton
-                key={item.value}
-                selected={selected.includes(item.value)}
-                onClick={() => {
-                  const newValues = selected.includes(item.value)
-                    ? selected.filter((v) => v !== item.value)
-                    : [...selected, item.value];
-                  updater(newValues);
-                }}
-                className="mb-2 mr-2"
-              >
-                {item.label}
-              </SidebarButton>
-            ))}
-          </div>
-        </AccordionContent>
-      </AccordionItem>
-    </Accordion>
-  </div>
-);
+}) => {
+  return (
+    <div className="flex w-full flex-col items-baseline justify-between border-b-2 border-[#36266d] px-[10px]">
+      <Accordion
+        className="w-full"
+        type="single"
+        collapsible
+      >
+        <AccordionItem
+          className="border-none"
+          value={label} // ✅ IMPORTANT: stable value
+        >
+          <AccordionTrigger className="w-full">
+            <div className="font-play text-sm">{label}</div>
+          </AccordionTrigger>
 
-export default SidebarSection;
+          <AccordionContent>
+            <div className="my-2 flex w-full flex-wrap items-center">
+              {data.map((item) => (
+                <SidebarButton
+                  key={item.value}
+                  selected={selected.includes(item.value)}
+                  onClick={() => {
+                    const newValues = selected.includes(item.value)
+                      ? selected.filter((v) => v !== item.value)
+                      : [...selected, item.value];
+                    updater(newValues);
+                  }}
+                  className="mb-2 mr-2"
+                >
+                  {item.label}
+                </SidebarButton>
+              ))}
+            </div>
+          </AccordionContent>
+        </AccordionItem>
+      </Accordion>
+    </div>
+  );
+};
+
+export default SidebarSection;
\ No newline at end of file