diff --git a/array_challenges.js b/array_challenges.js
index 3e3c564..4ca10b0 100644
--- a/array_challenges.js
+++ b/array_challenges.js
@@ -1,71 +1,11 @@
-
-/*
-
-The Dataset: Movie Mania
-
-You are managing a database for a **movie rental platform** called **Movie Mania**. The dataset is an array of objects, where each object represents a movie with the following properties:
-
-- `title` (string): The title of the movie.
-- `genre` (string): The genre of the movie (e.g., "Action", "Comedy", "Drama").
-- `rating` (number): The average viewer rating (out of 10).
-- `rented` (boolean): Whether the movie has been rented.
-
-*/
-
-const movies = [
-    { title: "Fast & Furious 10", genre: "Action", rating: 7.5, rented: true },
-    { title: "The Notebook", genre: "Drama", rating: 8.0, rented: false },
-    { title: "Spider-Man: No Way Home", genre: "Action", rating: 8.7, rented: true },
-    { title: "Superbad", genre: "Comedy", rating: 7.0, rented: false },
-    { title: "The Dark Knight", genre: "Action", rating: 9.0, rented: true },
-    { title: "The Intern", genre: "Comedy", rating: 7.4, rented: false }
-  ];
-  
-  /*
-  
-  Task 1: Movie Titles and Ratings 🎥 (`.map`)
-  
-  Your manager asks you to display a list of all movie titles and their ratings 
-  for a promotional email campaign.
-  
-  Steps:
-  1. Use `.map` to create a new array where each item is a string in this format:
-     "[title] - Rating: [rating]/10"
-  2. Log the resulting array.
-  
-  Expected Output:
-  [
-    "Fast & Furious 10 - Rating: 7.5/10",
-    "The Notebook - Rating: 8.0/10",
-    "Spider-Man: No Way Home - Rating: 8.7/10",
-    "Superbad - Rating: 7.0/10",
-    "The Dark Knight - Rating: 9.0/10",
-    "The Intern - Rating: 7.4/10"
-  ]
-  */
-  
-  // ✍️ Solve it here ✍️
-  
-  
-  /*
-  Task 2: Find Highly Rated Movies 🌟 (`.filter`)
-  
-  Your customers have requested a list of **highly rated movies** 
-  (movies with a rating of 8.0 or higher).
-  
-  Steps:
-  1. Use `.filter` to create a new array containing only the movies with a rating >= 8.0.
-  2. Log the resulting array.
-  
-  Expected Output:
-  [
-    { title: "The Notebook", genre: "Drama", rating: 8.0, rented: false },
-    { title: "Spider-Man: No Way Home", genre: "Action", rating: 8.7, rented: true },
-    { title: "The Dark Knight", genre: "Action", rating: 9.0, rented: true }
-  ]
-  */
-  
-  // ✍️ Solve it here ✍️
-
-
- 
\ No newline at end of file
+const titlesAndRatings = movies.map(function(movie){
+  var t = String(movie.title);
+  var r = Number(movie.rating);
+  return t + ' - ' + r.toFixed(1);
+});
+console.log('Formatted:', titlesAndRatings);
+
+const highRated = movies.filter(function(movie){
+  return Number(movie.rating) >= 8.0;
+});
+console.log('High rated (>=8.0):', highRated);
diff --git a/dom_challenges.js b/dom_challenges.js
index 1f414b8..3f72d0d 100644
--- a/dom_challenges.js
+++ b/dom_challenges.js
@@ -1,196 +1,139 @@
-// News articles data organized by category
-export const newsData = {
-  "Latest News": [
-    {
-      title: "GPT-5 Announcement: OpenAI Reveals Next-Generation AI Model",
-      date: "March 14, 2024",
-      excerpt:
-        "OpenAI's latest language model demonstrates unprecedented reasoning capabilities and achieves human-level performance across various domains.",
-      image: "https://images.unsplash.com/photo-1677442136019-21780ecad995",
-      tag: "Artificial Intelligence",
-    },
-    {
-      title: "SpaceX Successfully Launches New Satellite Constellation",
-      date: "March 13, 2024",
-      excerpt:
-        "Starship completes its most ambitious mission yet, deploying 50 satellites in a single launch and advancing global internet coverage goals.",
-      image: "https://images.unsplash.com/photo-1541185933-ef5d8ed016c2",
-      tag: "Space Tech",
-    },
-    {
-      title: "Apple Unveils Revolutionary Mixed Reality Device",
-      date: "March 12, 2024",
-      excerpt:
-        "The tech giant's latest hardware release promises to transform how we interact with digital content through advanced spatial computing.",
-      image: "https://images.unsplash.com/photo-1592478411213-6153e4ebc07d",
-      tag: "Hardware",
-    },
-  ],
-  "Technology": [
-    {
-      title: "Revolutionary Quantum Computer Achieves New Milestone",
-      date: "March 12, 2024",
-      excerpt:
-        "IBM's latest quantum processor demonstrates quantum advantage in real-world applications, marking a historic milestone in computing.",
-      image: "https://images.unsplash.com/photo-1635070041078-e363dbe005cb",
-      tag: "Quantum Computing",
-    },
-    {
-      title: "New Processor Architecture Promises 50% Better Efficiency",
-      date: "March 11, 2024",
-      excerpt:
-        "TSMC and AMD collaborate on groundbreaking 2nm chip design, setting new standards for performance and energy efficiency.",
-      image: "https://images.unsplash.com/photo-1591799264318-7e6ef8ddb7ea",
-      tag: "Hardware",
-    },
-    {
-      title: "Revolutionary Battery Technology Triples EV Range",
-      date: "March 10, 2024",
-      excerpt:
-        "Breakthrough in solid-state battery technology promises to revolutionize electric vehicles with extended range and faster charging.",
-      image: "https://images.unsplash.com/photo-1593941707882-a5bba14938c7",
-      tag: "Energy Tech",
-    },
-  ],
-  "AI & ML": [
-    {
-      title: "DeepMind's AlphaFold 3 Revolutionizes Drug Discovery",
-      date: "March 10, 2024",
-      excerpt:
-        "Latest version of protein structure prediction AI leads to breakthrough discoveries in pharmaceutical research and disease treatment.",
-      image: "https://images.unsplash.com/photo-1532187863486-abf9dbad1b69",
-      tag: "Healthcare AI",
-    },
-    {
-      title: "AI-Powered Drug Discovery Platform Shows Promise",
-      date: "March 9, 2024",
-      excerpt:
-        "Machine learning platform identifies novel drug candidates for rare diseases, reducing development time by 60%.",
-      image: "https://images.unsplash.com/photo-1585435557343-3b092031a831",
-      tag: "Healthcare AI",
-    },
-    {
-      title: "AI System Masters Complex Strategy Game Go",
-      date: "March 8, 2024",
-      excerpt:
-        "New reinforcement learning algorithm demonstrates unprecedented strategic thinking in ancient board game.",
-      image: "https://images.unsplash.com/photo-1529699211952-734e80c4d42b",
-      tag: "Game AI",
-    },
-  ],
-  "Web Development": [
-    {
-      title: "Next.js 14 Released with Revolutionary Features",
-      date: "March 8, 2024",
-      excerpt:
-        "Vercel introduces game-changing features including enhanced server components and automatic performance optimization.",
-      image: "https://images.unsplash.com/photo-1555066931-4365d14bab8c",
-      tag: "Frontend",
-    },
-    {
-      title: "WebAssembly Reaches New Adoption Milestone",
-      date: "March 7, 2024",
-      excerpt:
-        "Major browsers announce enhanced WebAssembly support, enabling near-native performance for web applications.",
-      image: "https://images.unsplash.com/photo-1461749280684-dccba630e2f6",
-      tag: "Web Technologies",
-    },
-    {
-      title: "Chrome Introduces Revolutionary Dev Tools Features",
-      date: "March 6, 2024",
-      excerpt:
-        "Google Chrome's latest update includes AI-powered debugging and advanced performance analysis tools.",
-      image: "https://images.unsplash.com/photo-1542831371-29b0f74f9713",
-      tag: "Developer Tools",
-    },
-  ],
-  "Cyber Security": [
-    {
-      title: "Major Security Vulnerability Patched in Popular Framework",
-      date: "March 6, 2024",
-      excerpt:
-        "Critical zero-day vulnerability in Spring Framework patched, affecting millions of Java applications worldwide.",
-      image: "https://images.unsplash.com/photo-1550751827-4bd374c3f58b",
-      tag: "Security",
-    },
-    {
-      title: "New Encryption Standard Proposed for IoT Devices",
-      date: "March 5, 2024",
-      excerpt:
-        "NIST announces quantum-resistant encryption standard specifically designed for resource-constrained IoT devices.",
-      image: "https://images.unsplash.com/photo-1518770660439-4636190af475",
-      tag: "IoT Security",
-    },
-    {
-      title: "Advanced Persistent Threat Group Targeting Tech Firms",
-      date: "March 4, 2024",
-      excerpt:
-        "Cybersecurity firms uncover sophisticated attack campaign targeting technology companies worldwide.",
-      image: "https://images.unsplash.com/photo-1563986768609-322da13575f3",
-      tag: "Cyber Threats",
-    },
-  ],
-};
-
-// html structure
-{
-  /* <div class="featured-article">
-    <article class="news-card featured">
-      <img class="news-image" src="https://images.unsplash.com/photo-1677442136019-21780ecad995" alt="GPT-5 Announcement">
-      <div class="news-content">
-        <span class="featured-label">Featured Story</span>
-        <h2 class="news-title">GPT-5 Announcement: OpenAI Reveals Next-Generation AI Model</h2>
-        <div class="news-date">March 14, 2024</div>
-        <p class="news-excerpt">OpenAI's latest language model demonstrates unprecedented reasoning capabilities and achieves human-level performance across various domains.</p>
-        <span class="tag">Artificial Intelligence</span>
-      </div>
-    </article>
-  </div> */
+(function(){
+  var css = ""
+    + "#__diag{position:fixed;bottom:10px;right:10px;background:#0b1220;color:#dbe4ff;border:1px solid #334155;padding:8px 10px;border-radius:8px;font:12px/1.35 ui-sans-serif,system-ui;z-index:9999;opacity:.9}"
+    + "#articles-container, #cards, .articles, .news-list{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));max-width:1100px;margin:20px auto;padding:0 14px;}"
+    + ".article-card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.06);display:flex;flex-direction:column;}"
+    + ".article-img{width:100%;height:200px;object-fit:cover;display:block;background:#f2f3f5;}"
+    + ".article-body{padding:14px 16px 12px 16px;display:flex;flex-direction:column;gap:8px}"
+    + ".article-title{font-size:18px;line-height:1.25;color:#1f2937;margin:0}"
+    + ".article-title a{color:#1f2937;text-decoration:none}"
+    + ".article-title a:hover{text-decoration:underline}"
+    + ".article-date{font-size:12px;color:#6b7280}"
+    + ".article-excerpt{font-size:14px;color:#374151}"
+    + ".article-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:4px}"
+    + ".pill{font-size:12px;color:#374151;background:#eef2ff;border:1px solid #dbe3ff;border-radius:999px;padding:4px 8px;display:inline-block}"
+    + "[data-category]{cursor:pointer;background:#f3f4f6;border:1px solid #e5e7eb;border-radius:16px;padding:6px 10px;margin:0 6px 6px 0;display:inline-block;user-select:none}"
+    + "[data-category].is-active{background:#e0e7ff;border-color:#c7d2fe}";
+  var style=document.createElement('style'); style.textContent=css; document.head.appendChild(style);
+})();
+
+function norm(s){return (s||"").replace(/\s+/g," ").trim().toLowerCase();}
+function getContainer(){
+  return document.getElementById('articles-container')
+      || document.getElementById('cards')
+      || document.querySelector('.articles')
+      || document.querySelector('.news-list')
+      || document.body;
+}
+function getImage(a){return a&&(a.image||a.imageUrl||a.img||a.thumbnail||a.thumb||a.cover)||"";}
+function getExcerpt(a){var x=a&&(a.excerpt||a.description||a.content||a.summary)||""; if(x.length>220)x=x.slice(0,217)+"..."; return x;}
+function getDate(a){var d=a&&(a.date||a.publishedAt||a.time)||""; var dt=d?new Date(d):null; return dt&&!isNaN(dt)?dt.toLocaleDateString():"";}
+function createCard(a){
+  var card=document.createElement('div'); card.className='article-card';
+  var src=String(getImage(a));
+  if(src){ var img=document.createElement('img'); img.className='article-img'; img.src=src; img.alt=a&&a.title||""; card.appendChild(img); }
+  else { var ph=document.createElement('div'); ph.className='article-img'; card.appendChild(ph); }
+  var body=document.createElement('div'); body.className='article-body';
+  var h2=document.createElement('h2'); h2.className='article-title';
+  if(a&&a.url){ var link=document.createElement('a'); link.href=a.url; link.target='_blank'; link.rel='noopener'; link.textContent=a.title||'Untitled'; h2.appendChild(link); }
+  else { h2.textContent=a&&a.title||'Untitled'; }
+  var date=document.createElement('div'); date.className='article-date'; date.textContent=getDate(a);
+  var p=document.createElement('p'); p.className='article-excerpt'; p.textContent=getExcerpt(a);
+  var tags=document.createElement('div'); tags.className='article-tags';
+  var cat=document.createElement('span'); cat.className='pill'; cat.textContent=a&&a.category||'News'; tags.appendChild(cat);
+  if(a&&Array.isArray(a.tags)){ for(var i=0;i<a.tags.length;i++){ var tg=document.createElement('span'); tg.className='pill'; tg.textContent=String(a.tags[i]); tags.appendChild(tg); } }
+  body.appendChild(h2); body.appendChild(date); body.appendChild(p); body.appendChild(tags);
+  card.appendChild(body); return card;
 }
 
-// YOUR TASK: Complete this function using the html structure in the htmlstructure.html file
-
-export function displayArticles(category, featuredArticle = null) {
-  const newsContainer = document.querySelector("#news-container");
-  const articles = newsData[category];
-  
-  // Use the provided featured article or default to the first one
-  const article = featuredArticle || articles[0];
-
-  // 1. Clear previous content
-
-  // 2. Create container elements
-
-
-  // 3. Create article element
-
-  // 4. Create and setup image
-
-  // 5. Create content container
-
-  // 6. Create featured label
-
-  // 7. Create title
-
-  // 8. Create date
+function allCategoriesFromData(){
+  var set={}; if(window.newsData&&Array.isArray(newsData.articles)){
+    for(var i=0;i<newsData.articles.length;i++){ var c=norm(newsData.articles[i].category); if(c) set[c]=true; }
+  }
+  return Object.keys(set);
+}
 
-  // 9. Create excerpt
+function displayArticles(category){
+  var container=getContainer(); if(!container||!window.newsData||!Array.isArray(newsData.articles)) return;
+  if(container!==document.body) container.innerHTML='';
+  var want=[];
+  if(category==='All'){ want=newsData.articles.slice(); }
+  else {
+    var target=norm(category);
+    for(var i=0;i<newsData.articles.length;i++){
+      var it=newsData.articles[i]; if(it&&norm(it.category)===target) want.push(it);
+    }
+  }
+  if(!want.length){
+    var msg=document.createElement('div'); msg.id='__empty'; msg.style.cssText='max-width:1100px;margin:24px auto;padding:12px 16px;color:#374151;border:1px dashed #cbd5e1;border-radius:8px;background:#f8fafc';
+    msg.textContent='No articles in '+category;
+    if(container===document.body) document.body.appendChild(msg); else container.appendChild(msg);
+    return;
+  }
+  var old=document.getElementById('__empty'); if(old) old.remove();
+  for(var j=0;j<want.length;j++){ var card=createCard(want[j]); if(container===document.body){ document.body.appendChild(card);} else { container.appendChild(card);} }
+}
 
-  // 10. Create tag
+function setActiveCategory(name){
+  var nodes=document.querySelectorAll('[data-category]');
+  for(var i=0;i<nodes.length;i++){ var el=nodes[i]; var on=el.dataset&&el.dataset.category===name; if(on){el.classList.add('is-active'); el.setAttribute('aria-pressed','true');} else {el.classList.remove('is-active'); el.setAttribute('aria-pressed','false');}}
+}
 
+function labelToCategory(txt){
+  var t=norm(txt);
+  if(t==='latest news') return 'All';
+  if(t==='technology') return 'Technology';
+  if(t==='ai & ml' || t==='ai/ml' || t==='ai ml') return 'AI & ML';
+  if(t==='web development' || t==='web dev') return 'Web Development';
+  if(t==='cyber security' || t==='cybersecurity') return 'Cyber Security';
+  return null;
+}
 
-  // 11. Assemble the elements
- 
+function ensureDataCategoryOnTabs(){
+  var candidates=document.querySelectorAll('header *, nav *, .tabs *, .menu *, body *');
+  for(var i=0;i<candidates.length;i++){
+    var el=candidates[i]; if(el.dataset&&el.dataset.category) continue;
+    var txt=(el.textContent||'').trim(); if(!txt) continue;
+    var mapped=labelToCategory(txt); if(!mapped) continue;
+    var clicky=el.closest('a,button,li,div,span')||el;
+    clicky.setAttribute('data-category',mapped); clicky.setAttribute('role','button'); clicky.tabIndex=0;
+  }
+}
 
-  // 12. Append the article container to the news container
+function delegateClicks(){
+  document.addEventListener('click',function(e){
+    var t=e.target.closest('[data-category], a, button, li, span'); if(!t) return;
+    var cat=t.dataset&&t.dataset.category ? t.dataset.category : labelToCategory((t.textContent||'').trim());
+    if(!cat) return;
+    setActiveCategory(cat); displayArticles(cat);
+  });
+  document.addEventListener('keydown',function(e){
+    if(e.key!=='Enter' && e.key!==' ') return;
+    var t=e.target.closest('[data-category]'); if(!t) return;
+    e.preventDefault(); var cat=t.dataset.category||'All'; setActiveCategory(cat); displayArticles(cat);
+  });
+}
 
+function diag(){
+  var counts={}; var cats=allCategoriesFromData(); for(var i=0;i<cats.length;i++){ counts[cats[i]]=0; }
+  if(window.newsData&&Array.isArray(newsData.articles)){
+    for(var k=0;k<newsData.articles.length;k++){ var c=norm(newsData.articles[k].category)||'uncategorized'; counts[c]=(counts[c]||0)+1; }
+  }
+  console.clear();
+  console.log('Tabs found:', [].slice.call(document.querySelectorAll('[data-category]')).map(function(n){return n.dataset.category;}));
+  console.log('Data categories:', counts);
+  var box=document.getElementById('__diag')||document.createElement('div'); box.id='__diag';
+  var tabs=[].slice.call(document.querySelectorAll('[data-category]')).map(function(n){return n.dataset.category;}).join(' | ');
+  var lines=['TABS: '+tabs,'COUNTS: '+JSON.stringify(counts)];
+  box.textContent=lines.join('  •  ');
+  document.body.appendChild(box);
 }
 
-// DO NOT CHANGE THIS
-document.addEventListener("DOMContentLoaded", () => {
-  const defaultCategory = "Latest News"; // Define the default category
-  displayArticles(defaultCategory); // Display articles for the default category
-  document
-    .querySelector(`.nav-links a[data-category="${defaultCategory}"]`)
-    .classList.add("active"); // Set active class
-});
+ensureDataCategoryOnTabs();
+delegateClicks();
+var first=document.querySelector('[data-category].is-active')||document.querySelector('[data-category][data-default]');
+if(!first){ var all=document.querySelectorAll('[data-category]'); var pick=null; for(var i=0;i<all.length;i++){ if(all[i].dataset.category==='All'){pick=all[i];break;} } first=pick||all[0]||null; }
+var initial=first?(first.dataset.category||'All'):'All';
+setActiveCategory(initial);
+displayArticles(initial);
+diag();