iOS Calculator

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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>
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <div class="calculator" id="calculator">
        <div class="header">
            <div class="time" id="time">12:45</div>
        </div>
        <div class="display" id="display">0</div>
        <div class="buttons">
            <button class="button operator" onclick="clearDisplay()">C</button>
            <button class="button operator" onclick="appendToDisplay('(')">(</button>
            <button class="button operator" onclick="appendToDisplay(')')">)</button>
            <button class="button operator" onclick="appendToDisplay('%')">%</button>
            <button class="button operator" onclick="appendToDisplay('/')">/</button>
            <button class="button operator" onclick="appendToDisplay('*')">*</button>
            <button class="button operator" onclick="appendToDisplay('-')">-</button>
            <button class="button operator" onclick="appendToDisplay('+')">+</button>
            <button class="button" onclick="appendToDisplay('Math.sqrt(')">√</button>
            <button class="button" onclick="appendToDisplay('Math.pow(')">x²</button>
            <button class="button" onclick="appendToDisplay('Math.abs(')">|x|</button>
            <button class="button" onclick="appendToDisplay('Math.log(')">log</button>
            <button class="button" onclick="appendToDisplay('Math.sin(')">sin</button>
            <button class="button" onclick="appendToDisplay('Math.cos(')">cos</button>
            <button class="button" onclick="appendToDisplay('Math.tan(')">tan</button>
            <button class="button" onclick="appendToDisplay('Math.exp(')">e^x</button>
            <button class="button" onclick="appendToDisplay('7')">7</button>
            <button class="button" onclick="appendToDisplay('8')">8</button>
            <button class="button" onclick="appendToDisplay('9')">9</button>
            <button class="button" onclick="appendToDisplay('4')">4</button>
            <button class="button" onclick="appendToDisplay('5')">5</button>
            <button class="button" onclick="appendToDisplay('6')">6</button>
            <button class="button" onclick="appendToDisplay('1')">1</button>
            <button class="button" onclick="appendToDisplay('2')">2</button>
            <button class="button" onclick="appendToDisplay('3')">3</button>
            <button class="button zero" onclick="appendToDisplay('0')">0</button>
            <button class="button equal" onclick="calculate()">=</button>
        </div>
        <div class="info">Swipe to rotate!</div>
    </div>
    <script src="script.js"></script>
</body>
</html>

CSS

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #1c1c1c, #333);
    font-family: 'Arial', sans-serif;
    margin: 0;
}

.calculator {
    background: #282828;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 400px;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #ffffff;
    font-size: 1.2em;
    padding: 10px 0;
}

.display {
    background: #1e1e1e;
    border-radius: 10px;
    padding: 20px;
    font-size: 2.5em;
    text-align: right;
    height: 60px;
    line-height: 60px;
    color: #ffffff;
    overflow: hidden;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5);
    margin-bottom: 20px;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.button {
    padding: 20px;
    font-size: 1.5em;
    border: none;
    background: #3a3a3a;
    border-radius: 10px;
    color: #ffffff;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
}

.button:hover {
    background: #4a4a4a;
    transform: scale(1.05);
}

.operator {
    background: #f39c12;
}

.operator:hover {
    background: #e67e22;
}

.equal {
    background: #2ecc71;
    grid-column: span 4;
}

.equal:hover {
    background: #27ae60;
}

.zero {
    grid-column: span 2;
}

.info {
    font-size: 0.8em;
    color: #ffffff;
    text-align: center;
    margin-top: 10px;
}

JS

let display = document.getElementById('display');
let timeElement = document.getElementById('time');

setInterval(updateTime, 1000);
updateTime();

function appendToDisplay(value) {
    if (display.innerText === '0' || display.innerText === 'Error') {
        display.innerText = '';
    }
    display.innerText += value;
    playSound();
}

function clearDisplay() {
    display.innerText = '0';
    playSound();
}

function playSound() {
    const audioContext = new (window.AudioContext || window.webkitAudioContext)();
    const oscillator = audioContext.createOscillator();
    oscillator.type = 'sine';
    oscillator.frequency.setValueAtTime(440, audioContext.currentTime);
    oscillator.connect(audioContext.destination);
    oscillator.start();
    oscillator.stop(audioContext.currentTime + 0.1);
}

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