*{
    margin:0;
    padding:0;
}

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(./wall.jpg) no-repeat center center;
}

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

#main{
    display:inline-block;
}

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

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

.wrapper{
    background:rgba(0,191,243,0.2);
    border-radius:10px;
}

.key{
    width:50px;
    height:40px;
    background:linear-gradient(to bottom,#292929 0%,#111111 100%);
    border:1px solid #373737;
    color:#c5d5c5;
    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;
}