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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>CalcMaster Pro</title>
    <link rel="stylesheet" href="style.css">
    <script src="https://cdn.tailwindcss.com"></script>
    <script src="https://unpkg.com/feather-icons"></script>
</head>
<body class="bg-gradient-to-br from-gray-900 to-black min-h-screen flex items-center justify-center p-4">
    <div class="w-full max-w-md">
        <div class="bg-gray-800 rounded-3xl shadow-2xl overflow-hidden">
            <!-- Display -->
            <div class="p-6 bg-gray-900">
                <div class="text-right">
                    <div id="previous-operand" class="text-gray-400 text-xl h-7 overflow-hidden"></div>
                    <div id="current-operand" class="text-white text-4xl font-bold h-12 overflow-hidden">0</div>
                </div>
            </div>
            
            <!-- Keypad -->
            <div class="p-5">
                <div class="grid grid-cols-4 gap-4">
                    <button data-action="clear" class="bg-red-500 hover:bg-red-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">C</button>
                    <button data-action="delete" class="bg-amber-500 hover:bg-amber-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">
                        <i data-feather="delete"></i>
                    </button>
                    <button data-action="operation" data-operation="%" class="bg-amber-500 hover:bg-amber-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">%</button>
                    <button data-action="operation" data-operation="÷" class="bg-amber-500 hover:bg-amber-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">÷</button>
                    
                    <button data-number="7" class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">7</button>
                    <button data-number="8" class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">8</button>
                    <button data-number="9" class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">9</button>
                    <button data-action="operation" data-operation="×" class="bg-amber-500 hover:bg-amber-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">×</button>
                    
                    <button data-number="4" class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">4</button>
                    <button data-number="5" class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">5</button>
                    <button data-number="6" class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">6</button>
                    <button data-action="operation" data-operation="-" class="bg-amber-500 hover:bg-amber-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">-</button>
                    
                    <button data-number="1" class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">1</button>
                    <button data-number="2" class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">2</button>
                    <button data-number="3" class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">3</button>
                    <button data-action="operation" data-operation="+" class="bg-amber-500 hover:bg-amber-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">+</button>
                    
                    <button data-number="0" class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl col-span-2 transition duration-200 active:scale-95">0</button>
                    <button data-number="." class="bg-gray-700 hover:bg-gray-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">.</button>
                    <button data-action="calculate" class="bg-green-500 hover:bg-green-600 text-white font-bold py-4 rounded-xl transition duration-200 active:scale-95">=</button>
                </div>
            </div>
        </div>
        
        <div class="mt-8 text-center">
            <h1 class="text-3xl font-bold text-white mb-2">CalcMaster Pro 🧮</h1>
            <p class="text-gray-400">The ultimate calculator experience</p>
        </div>
    </div>

    <script src="script.js"></script>
    <script>
        feather.replace();
    </script>
<script src="https://huggingface.co/deepsite/deepsite-badge.js"></script>
</body>
</html>