.keyboard {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-top: 20px;
}

    .keyboard button {
        padding: 15px;
        font-size: 20px;
        cursor: pointer;
    }

    .keyboard .backspace {
        /*grid-column: span 2;*/
    }
    .keyboard .clear {
        /*grid-column: span 2;*/
        

    }

.container {
    max-width: 500px;
    margin: auto;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}