* {
    margin: 0;
    padding: 0;
}
body {
    background: url("slide05.jpg") no-repeat;
    background-size: cover;
}
h1 {
    text-align: center;
    color: red;
    font-size: 50px;
    user-select: none;
    margin: 30px;
    line-height: 80px;
}
.logo {
    background-color: yellow;
    border-radius: 5px;
    padding: 5px 10px;
}
.keys {
    display: flex;
    height: 100vh;
    justify-content: center;
    align-content: center;
    flex-wrap: wrap;
}
.key kbd {
    display: block;
    font-size: 40px;
    color: white;
}
.key .sound {
    color: yellow;
    text-transform: uppercase;
}
.key {
    width: 95px;
    height: 55px;
    background-color: #0E0E0E;
    font-size: 15px;
    text-align: center;
    border: 3.5px solid black;
    border-radius: 8px;
    padding: 1rem .5rem;
    margin: 10px;
    transition: all .07s ease;
}
.playing {
    transform: scale(1.1);
    border-color: #ffc600;
    box-shadow: 0 0 1rem #ffc600;
}