<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>3D tilt Calculator create using CSS & JavaScript</title>
</head>
<body>
    <div class="conainer">
        <form name="calc" class="calculator">
            <input type="text" readonly class="value" name="text" placeholder="Enter your number">
            <span class="num clear" onclick="calc.text.value = ''">c</span>
            <span class="num" onclick="document.calc.text.value +='/'">/</span>
            <span class="num" onclick="document.calc.text.value +='*'">*</span>
            <span class="num" onclick="document.calc.text.value +='7'">7</span>
            <span class="num" onclick="document.calc.text.value +='8'">8</span>
            <span class="num" onclick="document.calc.text.value +='9'">9</span>
            <span class="num" onclick="document.calc.text.value +='-'">-</span>
            <span class="num" onclick="document.calc.text.value +='4'">4</span>
            <span class="num" onclick="document.calc.text.value +='5'">5</span>
            <span class="num" onclick="document.calc.text.value +='6'">6</span>
            <span class="num plus" onclick="document.calc.text.value +='+'">+</span>
            <span class="num" onclick="document.calc.text.value +='1'">1</span>
            <span class="num" onclick="document.calc.text.value +='2'">2</span>
            <span class="num" onclick="document.calc.text.value +='3'">3</span>
            <span class="num" onclick="document.calc.text.value +='0'">0</span>
            <span class="num" onclick="document.calc.text.value +='00'">00</span>
            <span class="num" onclick="document.calc.text.value +='.'">.</span>
            <span class="num equal" onclick="document.calc.text.value =eval(calc.text.value)">=</span>
        </form>
    </div>

    <script type="text/javascript" src="https://diptenu.me/CSS-Calculator/JavaScript/app.js"></script>
    <script type="text/javascript">
        VanillaTilt.init(document.querySelector(".conainer"), {
            max: 25,
            speed: 400,
            glare: true,
            "max-glare": .5,
        });
  </script>
</body>
</html>

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    /* background: #091921; */

}

body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(#e91e63, #ffc107);
    clip-path: circle(22% at 40% 30%);
}

body::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(#000000, #da00ff);
    clip-path: circle(22% at 60% 90%);
}

.conainer {
    position: relative;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    overflow: hidden;
    z-index: 10;
    backdrop-filter: blur(15px);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    border-left: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 5px 5px 30px rgba(0, 0, 0, 0.2);
}

.conainer .calculator {
    position: relative;
    display: grid;
}

.conainer .calculator .value {
    grid-column: span 4;
    height: 140px;
    width: 300px;
    text-align: right;
    border: none;
    outline: none;
    padding: 10px;
    font-size: 30px;
    background: transparent;
    /* color: #fff; */
    border-bottom: .5px solid rgba(0, 0, 0, 0.300);
    border-right: 1px solid rgba(255, 255, 255, 0.5);
}

.conainer .calculator span {
    display: grid;
    height: 75px;
    width: 75px;
    /* color: #fff; */
    font-weight: 400;
    place-items: center;
    cursor: pointer;
    font-size: 20px;
    user-select: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.conainer .calculator span:hover {
    transition: 0s;
    background: rgba(255, 255, 255, 0.05);
}

.conainer .calculator span:active {
    background: #091909;
    /* color: #192f00; */
    color: #fff;
    font-size: 24px;
    font-weight: 500;
}

.conainer .calculator .clear {
    grid-column: span 2;
    width: 150px;
    background: rgba(255, 255, 255, 0.2);
}

.conainer .calculator .plus {
    grid-row: span 2;
    height: 150px;
}

.equal {
    background: rgba(255, 255, 255, 0.2);
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.