kbd {
    background: linear-gradient(180deg,#eee,#ddd);
    background-color: #f4f4f4;
    border: 1px solid #d5d5d5;
    border: 0px solid #d5d5d5;
    border-bottom: 2px solid #aaa;
    border-radius: 4px;
    font-family: consolas,"Liberation Mono",courier,monospace;
    font-size: .9rem;
    font-weight: 700;
    line-height: 1;
    margin: .25rem;
    padding: 4px 6px;
    white-space: nowrap;
    color: #111;
    min-height: 1rem;
    user-select: none;
}
.kbd-disable {
    background: linear-gradient(180deg,#777,#555);
    color: #333;
    border: 0px solid transparent;
    border-bottom: 2px solid #444;
}

.display-log {
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    flex-direction: row;
    flex-wrap: wrap;
}
.display-log p {
    width: 100%;
    margin: .25rem 0;
    text-align: left;
    box-shadow: 0 .0625rem .125rem 0 #1119;
    display: flex;
    flex-wrap: wrap;
}
.display-log span {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    min-height: 2rem;
    margin-right: .25rem;
}

[data-key] {position: relative;}
[data-key]:hover {z-index: 1;}
[data-key]::after {
    content: attr(data-tooltip);
    position: absolute;
    top: 0%; left: 50%;
    transform: translateX(-50%) translateY(0%);

    min-height: 1rem;

    background-color: #f4f4f4;
    background: linear-gradient(180deg,#eee,#ddd);

    border: 1px solid #d5d5d5;
    border: 0px solid #d5d5d5;
    border-bottom: 2px solid #aaa;
    border-radius: 4px;

    font-family: consolas,"Liberation Mono",courier,monospace;
    font-size: .9rem;
    font-weight: 700;
    line-height: 1;

    padding: 4px 6px;

    white-space: nowrap;
    color: #111;
    
    user-select: none;

    /* disabled */
    background: linear-gradient(180deg,#777,#555);
    color: #333;
    border: 0px solid transparent;
    border-bottom: 2px solid #444;

    opacity: 0;
    z-index: -1;
    transition: transform 200ms ease-in-out, opacity 150ms ease-in-out 150ms;
    transition: transform 150ms ease-in-out 50ms, opacity 100ms ease-in-out;
}
[data-key]:hover::after {
    transform: translateX(-50%) translateY(-100%); 
    opacity: 1;
    transition: transform 250ms ease-in-out 50ms, opacity 100ms ease-in-out;
    transition: transform 200ms ease-in-out, opacity 100ms ease-in-out 100ms;
}