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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>Scientific Calculator</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        .calculator {
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            transition: all 0.3s ease;
        }
        .calculator:hover {
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.25);
        }
        .btn {
            transition: all 0.2s ease;
            transform: translateY(0);
        }
        .btn:active {
            transform: translateY(2px);
        }
        .display {
            min-height: 80px;
            word-wrap: break-word;
            word-break: break-all;
        }
        .scientific-btn {
            transition: all 0.3s ease;
            opacity: 0;
            max-height: 0;
            overflow: hidden;
        }
        .show-scientific .scientific-btn {
            opacity: 1;
            max-height: 100px;
        }
        .history-panel {
            transition: all 0.3s ease;
            transform: translateX(100%);
        }
        .show-history .history-panel {
            transform: translateX(0);
        }
    </style>
</head>
<body class="bg-gray-100 min-h-screen flex items-center justify-center p-4">
    <div class="calculator bg-gray-800 rounded-2xl p-4 w-full max-w-md relative overflow-hidden">
        <!-- Display Area -->
        <div class="display bg-gray-900 text-right p-4 rounded-lg mb-4 text-white font-mono">
            <div id="history" class="text-gray-400 text-sm min-h-4"></div>
            <div id="current" class="text-3xl font-semibold">0</div>
        </div>

        <!-- History Toggle -->
        <button id="historyToggle" class="absolute top-4 left-4 text-gray-400 hover:text-white">
            <i class="fas fa-history"></i>
        </button>

        <!-- History Panel -->
        <div class="history-panel absolute top-0 left-0 w-full h-full bg-gray-700 p-4 z-10 overflow-y-auto">
            <div class="flex justify-between items-center mb-4">
                <h3 class="text-white font-bold">Calculation History</h3>
                <button id="closeHistory" class="text-gray-400 hover:text-white">
                    <i class="fas fa-times"></i>
                </button>
            </div>
            <div id="historyList" class="text-gray-300 space-y-2"></div>
        </div>

        <!-- Mode Toggle -->
        <div class="flex justify-between mb-4">
            <button id="modeToggle" class="bg-blue-600 hover:bg-blue-700 text-white px-3 py-1 rounded-lg text-sm">
                <i class="fas fa-flask"></i> Scientific
            </button>
            <div class="flex space-x-2">
                <button id="clear" class="bg-red-600 hover:bg-red-700 text-white px-3 py-1 rounded-lg text-sm">
                    AC
                </button>
                <button id="backspace" class="bg-gray-600 hover:bg-gray-700 text-white px-3 py-1 rounded-lg text-sm">
                    <i class="fas fa-backspace"></i>
                </button>
            </div>
        </div>

        <!-- Calculator Buttons -->
        <div class="grid grid-cols-5 gap-2">
            <!-- Scientific Buttons (First Row) -->
            <button class="scientific-btn btn bg-purple-600 hover:bg-purple-700 text-white p-2 rounded-lg" data-value="sin(">sin</button>
            <button class="scientific-btn btn bg-purple-600 hover:bg-purple-700 text-white p-2 rounded-lg" data-value="cos(">cos</button>
            <button class="scientific-btn btn bg-purple-600 hover:bg-purple-700 text-white p-2 rounded-lg" data-value="tan(">tan</button>
            <button class="scientific-btn btn bg-purple-600 hover:bg-purple-700 text-white p-2 rounded-lg" data-value="log(">log</button>
            <button class="scientific-btn btn bg-purple-600 hover:bg-purple-700 text-white p-2 rounded-lg" data-value="ln(">ln</button>

            <!-- Scientific Buttons (Second Row) -->
            <button class="scientific-btn btn bg-purple-600 hover:bg-purple-700 text-white p-2 rounded-lg" data-value="asin(">sin⁻¹</button>
            <button class="scientific-btn btn bg-purple-600 hover:bg-purple-700 text-white p-2 rounded-lg" data-value="acos(">cos⁻¹</button>
            <button class="scientific-btn btn bg-purple-600 hover:bg-purple-700 text-white p-2 rounded-lg" data-value="atan(">tan⁻¹</button>
            <button class="scientific-btn btn bg-purple-600 hover:bg-purple-700 text-white p-2 rounded-lg" data-value="√("></button>
            <button class="scientific-btn btn bg-purple-600 hover:bg-purple-700 text-white p-2 rounded-lg" data-value="^">^</button>

            <!-- Standard Buttons -->
            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value="7">7</button>
            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value="8">8</button>
            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value="9">9</button>
            <button class="btn bg-blue-600 hover:bg-blue-700 text-white p-2 rounded-lg" data-value="/">/</button>
            <button class="btn bg-blue-600 hover:bg-blue-700 text-white p-2 rounded-lg" data-value="%">%</button>

            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value="4">4</button>
            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value="5">5</button>
            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value="6">6</button>
            <button class="btn bg-blue-600 hover:bg-blue-700 text-white p-2 rounded-lg" data-value="*">×</button>
            <button class="btn bg-blue-600 hover:bg-blue-700 text-white p-2 rounded-lg" data-value="π">π</button>

            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value="1">1</button>
            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value="2">2</button>
            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value="3">3</button>
            <button class="btn bg-blue-600 hover:bg-blue-700 text-white p-2 rounded-lg" data-value="-">-</button>
            <button class="btn bg-blue-600 hover:bg-blue-700 text-white p-2 rounded-lg" data-value="(">(</button>

            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value="0">0</button>
            <button class="btn bg-gray-600 hover:bg-gray-700 text-white p-2 rounded-lg" data-value=".">.</button>
            <button class="btn bg-green-600 hover:bg-green-700 text-white p-2 rounded-lg col-span-2" id="equals">=</button>
            <button class="btn bg-blue-600 hover:bg-blue-700 text-white p-2 rounded-lg" data-value="+">+</button>
            <button class="btn bg-blue-600 hover:bg-blue-700 text-white p-2 rounded-lg" data-value=")">)</button>
        </div>
    </div>

    <script>
        document.addEventListener('DOMContentLoaded', function() {
            // Calculator state
            let currentInput = '0';
            let previousInput = '';
            let operation = null;
            let resetScreen = false;
            const calculationHistory = [];

            // DOM elements
            const currentDisplay = document.getElementById('current');
            const historyDisplay = document.getElementById('history');
            const historyList = document.getElementById('historyList');
            const historyToggle = document.getElementById('historyToggle');
            const closeHistory = document.getElementById('closeHistory');
            const clearButton = document.getElementById('clear');
            const backspaceButton = document.getElementById('backspace');
            const equalsButton = document.getElementById('equals');
            const modeToggle = document.getElementById('modeToggle');
            const numberButtons = document.querySelectorAll('.btn[data-value]');
            const calculator = document.querySelector('.calculator');

            // Initialize
            updateDisplay();

            // Event listeners
            numberButtons.forEach(button => {
                button.addEventListener('click', () => {
                    appendNumber(button.dataset.value);
                });
            });

            equalsButton.addEventListener('click', evaluate);
            clearButton.addEventListener('click', clear);
            backspaceButton.addEventListener('click', deleteNumber);
            modeToggle.addEventListener('click', toggleScientificMode);
            historyToggle.addEventListener('click', showHistory);
            closeHistory.addEventListener('click', hideHistory);

            // Keyboard support
            document.addEventListener('keydown', (e) => {
                if (e.key >= '0' && e.key <= '9') appendNumber(e.key);
                else if (e.key === '.') appendNumber('.');
                else if (e.key === '+' || e.key === '-' || e.key === '*' || e.key === '/') {
                    appendNumber(e.key);
                }
                else if (e.key === 'Enter' || e.key === '=') evaluate();
                else if (e.key === 'Escape') clear();
                else if (e.key === 'Backspace') deleteNumber();
                else if (e.key === '(' || e.key === ')') appendNumber(e.key);
                else if (e.key === '^') appendNumber('^');
            });

            // Functions
            function appendNumber(number) {
                if (currentInput === '0' || resetScreen) {
                    currentInput = '';
                    resetScreen = false;
                }
                
                // Handle special constants
                if (number === 'π') {
                    currentInput += Math.PI.toString();
                } else {
                    currentInput += number;
                }
                
                updateDisplay();
            }

            function clear() {
                currentInput = '0';
                previousInput = '';
                operation = null;
                updateDisplay();
            }

            function deleteNumber() {
                if (currentInput.length === 1 || (currentInput.length === 2 && currentInput.startsWith('-'))) {
                    currentInput = '0';
                } else {
                    currentInput = currentInput.slice(0, -1);
                }
                updateDisplay();
            }

            function evaluate() {
                if (resetScreen) return;
                
                try {
                    // Replace special functions and constants
                    let expression = currentInput
                        .replace(/sin\(/g, 'Math.sin(')
                        .replace(/cos\(/g, 'Math.cos(')
                        .replace(/tan\(/g, 'Math.tan(')
                        .replace(/asin\(/g, 'Math.asin(')
                        .replace(/acos\(/g, 'Math.acos(')
                        .replace(/atan\(/g, 'Math.atan(')
                        .replace(/log\(/g, 'Math.log10(')
                        .replace(/ln\(/g, 'Math.log(')
                        .replace(/√\(/g, 'Math.sqrt(')
                        .replace(/\^/g, '**')
                        .replace(/π/g, 'Math.PI');
                    
                    // Evaluate the expression
                    const result = eval(expression);
                    
                    // Add to history
                    calculationHistory.push(`${currentInput} = ${result}`);
                    updateHistory();
                    
                    // Update display
                    previousInput = currentInput;
                    currentInput = result.toString();
                    operation = null;
                    resetScreen = true;
                    updateDisplay();
                } catch (error) {
                    currentInput = 'Error';
                    updateDisplay();
                    setTimeout(clear, 1500);
                }
            }

            function updateDisplay() {
                currentDisplay.textContent = currentInput;
                historyDisplay.textContent = previousInput;
            }

            function updateHistory() {
                historyList.innerHTML = '';
                calculationHistory.slice().reverse().forEach(item => {
                    const historyItem = document.createElement('div');
                    historyItem.textContent = item;
                    historyItem.classList.add('cursor-pointer', 'hover:text-white');
                    historyItem.addEventListener('click', () => {
                        currentInput = item.split(' = ')[0];
                        updateDisplay();
                        hideHistory();
                    });
                    historyList.appendChild(historyItem);
                });
            }

            function toggleScientificMode() {
                calculator.classList.toggle('show-scientific');
                if (calculator.classList.contains('show-scientific')) {
                    modeToggle.innerHTML = '<i class="fas fa-calculator"></i> Standard';
                } else {
                    modeToggle.innerHTML = '<i class="fas fa-flask"></i> Scientific';
                }
            }

            function showHistory() {
                calculator.classList.add('show-history');
                updateHistory();
            }

            function hideHistory() {
                calculator.classList.remove('show-history');
            }
        });
    </script>
<p style="border-radius: 8px; text-align: center; font-size: 12px; color: #fff; margin-top: 16px;position: fixed; left: 8px; bottom: 8px; z-index: 10; background: rgba(0, 0, 0, 0.8); padding: 4px 8px;">Made with <img src="https://enzostvs-deepsite.hf.space/logo.svg" alt="DeepSite Logo" style="width: 16px; height: 16px; vertical-align: middle;display:inline-block;margin-right:3px;filter:brightness(0) invert(1);"><a href="https://enzostvs-deepsite.hf.space" style="color: #fff;text-decoration: underline;" target="_blank" >DeepSite</a> - <a href="https://enzostvs-deepsite.hf.space?remix=Mishak/calculator" style="color: #fff;text-decoration: underline;" target="_blank" >🧬 Remix</a></p></body>
</html>