Template:Key/styles.css

.keyboard-key {
    border: 1px solid #aaa;
    border-radius: 0.2em;
    box-shadow: 0.1em 0.1em 0.2em rgba(0, 0, 0, 0.1);
    background-color: #f8f9fa;
    background-image: linear-gradient(to bottom, #eaecf0, #f8f9fa, #eaecf0);
    color: #202122;
    padding: 0.1em 0.3em;
    font-family: inherit;
    font-size: 0.85em;
    white-space: nowrap;
}