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<!DOCTYPE html>
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<title>CS Mastery | Learn Computer Science</title>
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background-color: #1e293b;
color: #f8fafc;
}
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color: #94a3b8;
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<h1 class="text-4xl md:text-5xl font-bold mb-4">Master Computer Science From Zero to Hero</h1>
<p class="text-xl mb-8">Interactive learning platform for beginners to advanced students. Learn programming, algorithms, data structures, and more with hands-on exercises.</p>
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<div class="ml-4 text-sm text-gray-400">script.js</div>
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<div class="p-4 overflow-auto" style="max-height: 300px;">
<pre class="text-sm"><code class="language-javascript">// Binary Search Implementation
function binarySearch(arr, target) {
let left = 0;
let right = arr.length - 1;
while (left <= right) {
const mid = Math.floor((left + right) / 2);
if (arr[mid] === target) {
return mid; // Found the target
} else if (arr[mid] < target) {
left = mid + 1; // Search right half
} else {
right = mid - 1; // Search left half
}
}
return -1; // Target not found
}
// Example usage
const numbers = [1, 3, 5, 7, 9, 11, 13];
console.log(binarySearch(numbers, 9)); // Output: 4</code></pre>
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<button class="skill-level px-6 py-3 rounded-lg font-semibold bg-indigo-100 text-indigo-700 relative transition hover:bg-indigo-200" data-level="beginner">
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<i class="fas fa-brain mr-2"></i> Advanced
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<i class="fas fa-trophy mr-2"></i> Expert
</button>
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<div class="w-3 h-3 rounded-full bg-yellow-500"></div>
<div class="w-3 h-3 rounded-full bg-green-500"></div>
</div>
<div class="text-sm text-gray-400">playground.js</div>
</div>
<select id="language-select" class="bg-gray-700 text-gray-200 text-sm px-2 py-1 rounded">
<option value="javascript">JavaScript</option>
<option value="python">Python</option>
<option value="java">Java</option>
<option value="csharp">C#</option>
<option value="cpp">C++</option>
</select>
</div>
<textarea id="code-input" class="w-full p-4 text-sm h-64 focus:outline-none" spellcheck="false">// Write your code here
// Example: Calculate factorial
function factorial(n) {
if (n === 0 || n === 1) {
return 1;
}
return n * factorial(n - 1);
}
console.log(factorial(5)); // Should output 120</textarea>
</div>
<div class="flex justify-between">
<button id="run-code" class="bg-green-600 text-white px-6 py-2 rounded-lg font-semibold hover:bg-green-700 transition">
<i class="fas fa-play mr-2"></i> Run Code
</button>
<button id="reset-code" class="bg-gray-600 text-white px-6 py-2 rounded-lg font-semibold hover:bg-gray-700 transition">
<i class="fas fa-redo mr-2"></i> Reset
</button>
</div>
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<div>
<div class="terminal rounded-lg shadow-lg h-80 overflow-hidden">
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<div class="w-3 h-3 rounded-full bg-yellow-500"></div>
<div class="w-3 h-3 rounded-full bg-green-500"></div>
</div>
<div class="text-sm text-gray-400">Terminal Output</div>
</div>
<div id="code-output" class="p-4 overflow-auto h-full">
<div class="text-green-400">$ Output will appear here after running your code</div>
</div>
</div>
<div class="mt-4">
<h3 class="font-semibold mb-2">Challenge:</h3>
<p class="text-sm text-gray-700">Modify the factorial function to handle negative numbers by returning an error message.</p>
</div>
</div>
</div>
</div>
</section>
<!-- Courses Section -->
<section id="courses" class="py-16 bg-white">
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<h2 class="text-3xl font-bold text-center mb-12">Featured Courses</h2>
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<!-- Course 1 -->
<div class="flip-card bg-white rounded-xl shadow-lg overflow-hidden h-full">
<div class="flip-card-inner h-full">
<div class="flip-card-front h-full">
<div class="h-48 bg-indigo-600 flex items-center justify-center">
<i class="fas fa-code text-white text-6xl"></i>
</div>
<div class="p-6">
<h3 class="text-xl font-bold mb-2">Programming Fundamentals</h3>
<p class="text-gray-600 mb-4">Learn the basics of programming with JavaScript, Python, or Java.</p>
<div class="flex items-center text-sm text-gray-500">
<i class="fas fa-clock mr-2"></i>
<span>8 weeks</span>
<i class="fas fa-star ml-4 mr-2 text-yellow-500"></i>
<span>4.9</span>
</div>
</div>
</div>
<div class="flip-card-back bg-indigo-700 text-white p-6 h-full flex flex-col justify-center">
<h3 class="text-xl font-bold mb-4">What You'll Learn</h3>
<ul class="list-disc pl-5 space-y-2 text-sm">
<li>Variables, data types, and operators</li>
<li>Control structures (loops, conditionals)</li>
<li>Functions and modular programming</li>
<li>Basic data structures (arrays, objects)</li>
<li>Debugging techniques</li>
</ul>
<button class="mt-6 bg-white text-indigo-700 px-4 py-2 rounded-lg font-semibold hover:bg-gray-100 transition self-start">Enroll Now</button>
</div>
</div>
</div>
<!-- Course 2 -->
<div class="flip-card bg-white rounded-xl shadow-lg overflow-hidden h-full">
<div class="flip-card-inner h-full">
<div class="flip-card-front h-full">
<div class="h-48 bg-blue-600 flex items-center justify-center">
<i class="fas fa-project-diagram text-white text-6xl"></i>
</div>
<div class="p-6">
<h3 class="text-xl font-bold mb-2">Data Structures & Algorithms</h3>
<p class="text-gray-600 mb-4">Master essential CS concepts for technical interviews.</p>
<div class="flex items-center text-sm text-gray-500">
<i class="fas fa-clock mr-2"></i>
<span>12 weeks</span>
<i class="fas fa-star ml-4 mr-2 text-yellow-500"></i>
<span>4.8</span>
</div>
</div>
</div>
<div class="flip-card-back bg-blue-700 text-white p-6 h-full flex flex-col justify-center">
<h3 class="text-xl font-bold mb-4">What You'll Learn</h3>
<ul class="list-disc pl-5 space-y-2 text-sm">
<li>Arrays, Linked Lists, Stacks, Queues</li>
<li>Trees, Graphs, Hash Tables</li>
<li>Sorting and searching algorithms</li>
<li>Recursion and dynamic programming</li>
<li>Time and space complexity analysis</li>
</ul>
<button class="mt-6 bg-white text-blue-700 px-4 py-2 rounded-lg font-semibold hover:bg-gray-100 transition self-start">Enroll Now</button>
</div>
</div>
</div>
<!-- Course 3 -->
<div class="flip-card bg-white rounded-xl shadow-lg overflow-hidden h-full">
<div class="flip-card-inner h-full">
<div class="flip-card-front h-full">
<div class="h-48 bg-purple-600 flex items-center justify-center">
<i class="fas fa-server text-white text-6xl"></i>
</div>
<div class="p-6">
<h3 class="text-xl font-bold mb-2">Advanced Systems Design</h3>
<p class="text-gray-600 mb-4">Design scalable distributed systems for senior engineers.</p>
<div class="flex items-center text-sm text-gray-500">
<i class="fas fa-clock mr-2"></i>
<span>10 weeks</span>
<i class="fas fa-star ml-4 mr-2 text-yellow-500"></i>
<span>4.9</span>
</div>
</div>
</div>
<div class="flip-card-back bg-purple-700 text-white p-6 h-full flex flex-col justify-center">
<h3 class="text-xl font-bold mb-4">What You'll Learn</h3>
<ul class="list-disc pl-5 space-y-2 text-sm">
<li>System architecture patterns</li>
<li>Database scaling and replication</li>
<li>Caching strategies</li>
<li>Load balancing and CDNs</li>
<li>Microservices architecture</li>
</ul>
<button class="mt-6 bg-white text-purple-700 px-4 py-2 rounded-lg font-semibold hover:bg-gray-100 transition self-start">Enroll Now</button>
</div>
</div>
</div>
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</section>
<!-- Progress Tracker -->
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<svg class="w-full h-full" viewBox="0 0 36 36">
<path
d="M18 2.0845
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<path
d="M18 2.0845
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</svg>
<div class="absolute inset-0 flex items-center justify-center">
<span class="text-lg font-bold" id="challenge-percent">0%</span>
</div>
</div>
<h3 class="font-semibold">Challenges Solved</h3>
</div>
<div class="text-center">
<div class="relative w-24 h-24 mx-auto mb-4">
<svg class="w-full h-full" viewBox="0 0 36 36">
<path
d="M18 2.0845
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fill="none"
stroke="#e6e6e6"
stroke-width="3"
/>
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class="progress-ring__circle"
d="M18 2.0845
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stroke="#f59e0b"
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</svg>
<div class="absolute inset-0 flex items-center justify-center">
<span class="text-lg font-bold" id="concept-percent">0%</span>
</div>
</div>
<h3 class="font-semibold">Concepts Mastered</h3>
</div>
<div class="text-center">
<div class="relative w-24 h-24 mx-auto mb-4">
<svg class="w-full h-full" viewBox="0 0 36 36">
<path
d="M18 2.0845
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stroke="#e6e6e6"
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stroke="#ef4444"
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id="streak-progress"
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</svg>
<div class="absolute inset-0 flex items-center justify-center">
<span class="text-lg font-bold" id="streak-count">0</span>
</div>
</div>
<h3 class="font-semibold">Day Streak</h3>
</div>
</div>
<div class="mt-8">
<h3 class="font-semibold mb-4">Recent Activity</h3>
<div class="space-y-4">
<div class="flex items-start">
<div class="bg-indigo-100 p-2 rounded-full mr-3">
<i class="fas fa-check-circle text-indigo-600"></i>
</div>
<div>
<p class="text-sm font-medium">Completed "Recursion Basics" lesson</p>
<p class="text-xs text-gray-500">2 hours ago</p>
</div>
</div>
<div class="flex items-start">
<div class="bg-green-100 p-2 rounded-full mr-3">
<i class="fas fa-code text-green-600"></i>
</div>
<div>
<p class="text-sm font-medium">Solved "Binary Tree Traversal" challenge</p>
<p class="text-xs text-gray-500">Yesterday</p>
</div>
</div>
<div class="flex items-start">
<div class="bg-yellow-100 p-2 rounded-full mr-3">
<i class="fas fa-book text-yellow-600"></i>
</div>
<div>
<p class="text-sm font-medium">Started "System Design Fundamentals" course</p>
<p class="text-xs text-gray-500">3 days ago</p>
</div>
</div>
</div>
</div>
</div>
</div>
</section>
<!-- Resources Section -->
<section id="resources" class="py-16 bg-white">
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<!-- Cheat Sheets -->
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