html {
    font-size: .7em;





  }

  body,html {
display: flex;
flex-direction: column;

    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background-image: url(background.jpg)  ;


    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;


  }
  .blur {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    height: 100vh;
    width: 100%;
  }
.keys{
    display: flex;
    min-height: 100vh;

    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    animation: animate 3s linear infinite;

}
.key{
    display: flexbox;

    border:4px solid black;
    border-radius: 5px;
    margin: 0 1em;
    font-size: .5em;
    padding: 1em .5em;
    transition: all 0.2s;
    width: 4vw;
    text-align: center;
    color: white;
    background:rgba(0,0,0,0.4);
    text-shadow: 0 0 5px black;
    text-transform: uppercase;

}
.drums{
    position: fixed;
    bottom: 0;

    align-items: center;

    background-image: url(drums.png);
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center;
    margin: 10px 0;
    padding: 0;
    filter: hue-rotate(80deg) invert(1);
    width: 25vw;
   height: 35vh;
    z-index: -1;


}

@keyframes animate {
    0% {
        filter: hue-rotate(0deg);


    }

    100% {

        filter: hue-rotate(360deg);
    }
}
.playing{

    position: relative;
    transform: scale(5);
    border-color: #ffc600;
    box-shadow: 0 0 10px #ffc600;
    border-radius: 50%;
    background-color: red;
    filter: blur(100%);


}
.playing::before{


    content: "🔥";
    position: absolute;
    font-size: 1.5em;
    top: 10px;
    left: 10px;

    background-color: red;
    border-radius: 50%;
    transform: scale(6);
    transition: transform 0.2s;
    animation: animate 3s linear infinite;
}
kbd {
    display: block;
    font-size: calc(4em + 1vw);
    width: 4vw;
    text-align: center;
}
.sound {
    font-size: calc(2px + .6vw);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: #ffc600;
  }