Feat: Implement JEE quiz interface with navigation and answer handling

* feat: add JEE quiz interface with navigation, timer, and answer handling

* refactor: improve quiz page UI and layout styling

* fix: resolve issue identified by GitHub Copilot suggestion

Author: ABHISHEKUPAI

app/components/pages/Retentiaquiz.tsx

@@ -0,0 +1,265 @@
+"use client";
+
+import { useState } from "react";
+import Card from "../ui/Card";
+import Button from "../ui/Button";
+import ProgressBar from "../ui/Progressbar";
+import Timer from "../ui/Timer";
+import QuestionNavigation from "../ui/QuestionNavigation";
+import { Flag, ChevronRight } from "lucide-react";
+
+export default function Retentiaquiz() {
+
+  const totalQuestions = 50;
+
+  const [showSubmitModal, setShowSubmitModal] = useState(false);
+  const [currentQuestion, setCurrentQuestion] = useState(1);
+  const [answers, setAnswers] = useState<Record<number, string | null>>({});
+  const [confirmedAnswers, setConfirmedAnswers] = useState<Record<number, boolean>>({});
+  const [markedReview, setMarkedReview] = useState<Record<number, boolean>>({});
+  const [skipped, setSkipped] = useState<Record<number, boolean>>({});
+
+  const answeredCount = Object.keys(confirmedAnswers).length;
+
+  const options = [
+    { id: "A", text: "Solar power" },
+    { id: "B", text: "Wind Power" },
+    { id: "C", text: "Natural Gas" },
+    { id: "D", text: "Hydroelectric Power" },
+  ];
+
+  const confirmSubmit = () => {
+    setShowSubmitModal(false);
+    
+    console.log("Quiz submitted successfully");
+
+  };
+
+  const handleOptionClick = (optionId: string) => {
+
+    setAnswers((prev) => {
+
+      const current = prev[currentQuestion];
+
+      return {
+        ...prev,
+        [currentQuestion]: current === optionId ? null : optionId,
+      };
+
+    });
+
+    setSkipped((prev) => {
+      const updated = { ...prev };
+      delete updated[currentQuestion];
+      return updated;
+    });
+
+  };
+
+  const handleNext = () => {
+
+    if (answers[currentQuestion]) {
+
+      setConfirmedAnswers((prev) => ({
+        ...prev,
+        [currentQuestion]: true,
+      }));
+
+      setSkipped((prev) => {
+        const updated = { ...prev };
+        delete updated[currentQuestion];
+        return updated;
+      });
+
+    } else {
+
+      setSkipped((prev) => ({
+        ...prev,
+        [currentQuestion]: true,
+      }));
+
+      setConfirmedAnswers((prev) => {
+        const updated = { ...prev };
+        delete updated[currentQuestion];
+        return updated;
+      });
+
+    }
+
+    if (currentQuestion < totalQuestions) {
+      setCurrentQuestion((prev) => prev + 1);
+    }
+
+  };
+
+  const toggleReview = () => {
+
+    setMarkedReview((prev) => ({
+      ...prev,
+      [currentQuestion]: !prev[currentQuestion],
+    }));
+
+    setSkipped((prev) => {
+      const updated = { ...prev };
+      delete updated[currentQuestion];
+      return updated;
+    });
+
+  };
+  const handleSubmit = () => {
+  setShowSubmitModal(true);
+};
+
+  return (
+
+    <main className="min-h-screen flex flex-col justify-center bg-background py-10
+    px-4 sm:px-10 md:px-20 lg:px-80">
+
+        <div className="grid grid-cols-3 items-center mt-3 gap-4">
+
+          <div></div>
+
+          <div className="flex justify-center">
+            <Timer totalQuestions={totalQuestions} />
+          </div>
+
+          <div className="flex justify-center sm:justify-end">
+            <Button
+              variant="default"
+              className="bg-answered px-6 py-2 text-white"
+              onClick={handleSubmit}
+            >
+              Submit
+            </Button>
+          </div>
+
+        </div>
+
+        <div className="mb-10 mt-10">
+          <ProgressBar
+            answered={answeredCount}
+            total={totalQuestions}
+          />
+        </div>
+
+        <QuestionNavigation
+          currentQuestion={currentQuestion}
+          totalQuestions={totalQuestions}
+          onQuestionChange={setCurrentQuestion}
+          confirmedAnswers={confirmedAnswers}
+          markedReview={markedReview}
+          skipped={skipped}
+        />
+
+      <Card
+        variant="primary"
+        className="w-full max-h-212.5 px-4 sm:px-6 md:px-10"
+      >
+
+        <Card
+          variant="secondary"
+          className="w-full mb-15 flex items-center justify-center"
+        >
+          <p className="text-xl sm:text-2xl md:text-3xl font-bold leading-relaxed p-6 sm:p-10 md:p-15 text-center">
+            Which of the following energy sources cannot be
+            replenished naturally on a human timescale?
+          </p>
+        </Card>
+
+        <div className="space-y-5 text-lg sm:text-xl">
+
+          {options.map((option) => {
+
+            const isSelected = answers[currentQuestion] === option.id;
+            const isAnswered = confirmedAnswers[currentQuestion];
+
+            let colorClass = "";
+
+            if (isAnswered && isSelected) colorClass = "border-secondary ";
+            else if (isSelected) colorClass = "border-secondary";
+
+            return (
+
+              <Button
+                key={option.id}
+                variant="opt_btn"
+                onClick={() => handleOptionClick(option.id)}
+                className={`${colorClass}`}
+              >
+
+                <div className="flex items-center justify-center w-8 h-8 rounded-full bg-white text-black font-semibold">
+                  {option.id}
+                </div>
+
+                <span className="flex-1 text-left">
+                  {option.text}
+                </span>
+
+              </Button>
+
+            );
+          })}
+
+        </div>
+
+      </Card>
+
+      <div className="flex flex-col sm:flex-row justify-end items-center gap-5 mt-20 mb-5">
+
+          <Button
+            variant="default"
+            onClick={toggleReview}
+            className="bg-purple-600 text-white px-6 py-2 flex items-center gap-2 w-full sm:w-auto justify-center"
+          >
+            <Flag size={18} />
+            Mark For Review
+          </Button>
+
+          <Button
+            variant="default"
+            onClick={handleNext}
+            className="bg-secondary px-6 py-2 flex text-white items-center gap-2 w-full sm:w-auto justify-center"
+          >
+            Next Question
+            <ChevronRight size={18} />
+          </Button>
+
+        </div>
+        {showSubmitModal && (
+      <div className="fixed inset-0 bg-background flex items-center justify-center z-50">
+        <Card variant="primary" className="p-8 max-w-md w-full text-center">
+
+            <h2 className="text-xl font-bold mb-4">
+              Submit Quiz?
+            </h2>
+
+            <p className="text-text mb-6">
+              Are you sure you want to submit the quiz?
+            </p>
+
+            <div className="flex justify-center gap-4">
+
+            <Button
+              variant="default"
+              onClick={() => setShowSubmitModal(false)}
+            >
+              Cancel
+            </Button>
+
+            <Button
+              variant="default"
+              className="bg-answered text-text"
+              onClick={confirmSubmit}
+            >
+              Submit
+            </Button>
+
+          </div>
+
+        </Card>
+      </div>
+  )}
+
+    </main>
+  );
+}

app/components/ui/Button.tsx

@@ -1,19 +1,35 @@
 type ButtonProps = {
   children: React.ReactNode;
-  variant?: "default" | "sidebar_btn" ;
+  variant?: "default" | "sidebar_btn" | "opt_btn";
   className?: string;
+  onClick?: () => void;
 };
 
-export default function Button({children,variant = "default",className = "", }: ButtonProps) {
-  const base = "flex items-center cursor-pointer ";
+export default function Button({
+  children,
+  variant = "default",
+  className = "",
+  onClick,
+}: ButtonProps) {
+  const base = "cursor-pointer min-h-[48px]";
+
   const variants = {
-    default: "text-text text-2xl",
-    sidebar_btn: "group text-2xl px-4 gap-4 py-2 font-semibold rounded-full hover:bg-primary-light",
-    
+    default:
+      "flex p-2 sm:p-3 md:p-4 rounded-2xl items-center text-text text-base sm:text-lg md:text-xl",
+
+    sidebar_btn:
+      "flex items-center group text-lg sm:text-xl md:text-2xl px-2 sm:px-4 gap-2 sm:gap-4 py-2 font-semibold rounded-full hover:bg-primary-light",
+
+    opt_btn:
+      "w-full text-lg sm:text-xl md:text-2xl font-bold rounded-3xl sm:py-6 md:py-8 px-4 sm:px-6 md:px-7 items-start text-left break-words bg-background/70 border-background flex  justify-center gap-5 border-2 hover:bg-background/30 hover:border-text/60 transition-colors overflow-y-auto",
   };
 
   return (
-    <button className={`${base} ${variants[variant]} ${className}`}>
+    <button
+      type="button"
+      onClick={onClick}
+      className={`${base} ${variants[variant]} ${className}`}
+    >
       {children}
     </button>
   );

app/components/ui/Card.tsx

@@ -0,0 +1,23 @@
+type CardProps = {
+  children: React.ReactNode;
+  variant?: "primary" | "secondary";
+  className?: string;
+};
+
+export default function Card({
+  children,
+  variant = "primary",
+  className = "",
+}: CardProps) {
+  const base = "rounded-3xl p-6 ";
+  const variants = {
+    primary: "bg-foreground flex overflow-y-auto flex-col text-text",
+    secondary: "bg-background/70 text-text",
+  };
+
+  return (
+    <div className={`${base} ${variants[variant]} ${className}`}>
+      {children}
+    </div>
+  );
+}

app/components/ui/Progressbar.tsx

@@ -0,0 +1,35 @@
+type ProgressBarProps = {
+  answered: number;
+  total: number;
+  className?: string;
+};
+
+export default function ProgressBar({
+  answered,
+  total,
+  className = "",
+}: ProgressBarProps) {
+
+  const progress = total > 0 ? (answered / total) * 100 : 0;
+
+  return (
+    <div className={`w-full ${className}`}>
+
+      
+      <div className="flex justify-between text-xl mb-1 text-text/70">
+        <span>{answered} / {total} answered</span>
+      </div>
+
+     
+      <div className="w-full h-4 rounded-full bg-text overflow-hidden">
+
+        <div
+          className="h-full rounded-full bg-[#22C55E] transition-all duration-300 ease-out"
+          style={{ width: `${progress}%` }}
+        />
+
+      </div>
+
+    </div>
+  );
+}