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Create simple calculator using HTML, CSS, and JavaScript

HTML

CSS

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #282c34;
    margin: 0;
    font-family: 'Roboto', sans-serif;
    color: #ffffff;
}

.calculator {
    border: 1px solid #444;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    background-color: #1c1c1c;
}

#display {
    width: 100%;
    padding: 20px;
    font-size: 2em;
    border: none;
    text-align: right;
    background-color: #333;
    color: #fff;
}

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

.button {
    padding: 20px;
    font-size: 1.5em;
    border: 1px solid #444;
    background-color: #666;
    color: #fff;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.button:hover {
    background-color: #555;
}

.button:active {
    background-color: #444;
}

.button.operator {
    background-color: #f39c12;
}

.button.operator:hover {
    background-color: #e67e22;
}

.button.operator:active {
    background-color: #d35400;
}

.button.clear {
    background-color: #e74c3c;
}

.button.clear:hover {
    background-color: #c0392b;
}

.button.clear:active {
    background-color: #a93226;
}

.button.delete {
    background-color: #e67e22;
}

.button.delete:hover {
    background-color: #d35400;
}

.button.delete:active {
    background-color: #b03a2e;
}

.button.equals {
    grid-column: span 4;
    background-color: #27ae60;
}

.button.equals:hover {
    background-color: #2ecc71;
}

.button.equals:active {
    background-color: #229954;
}

.button.zero {
    grid-column: span 2;
}

Live Code Editor

Create simple calculator using HTML, CSS, and JavaScript

HTML

CSS

JavaScript

Output