* {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
}

kbd {
    border: 1px solid red;
    width: 4em;
    height: 4em;
    display: inline-block;
    text-transform: uppercase;
    position: relative;
}

kbd>button {
    position: absolute;
    right: 0;
    bottom: 0;
    display: none;
}

kbd:hover>button {
    display: inline-block;
}

body {
    background: grey url(./bj.png) no-repeat center center;
}

main {
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

#main {
    display: inline-block;
    margin-bottom: -650px;
}

#main>div:nth-child(2) {
    margin-left: -22px;
}

#main>div:nth-child(3) {
    margin-left: -80px;
}

.wrapper {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
}

.key {
    width: 50px;
    height: 40px;
    background: linear-gradient(to bottom, #292929 0%, #111111 100%);
    border: 1px solid #373737;
    color: #C5C5C5;
    border-radius: 6px;
    box-shadow: 0 0 0 1px #1A1B1C, 0 0 0 2px #1F2020, 0 3px 0 2px #080808;
    position: relative;
    font-size: 16px;
    font-family: Helvetica;
}

.row {
    margin: 20px;
}

.row .key {
    margin: 0 10px;
}

.key img {
    width: 16px;
    height: 16px;
    position: absolute;
    left: 4px;
    bottom: 2px;
}

.key .text {
    position: absolute;
    left: 4px;
    top: 2px;
}