*{
    box-sizing:border-box
}
body{
    margin:0;
    background: url(./assets/bg.png);
    background-repeat: no-repeat;
    background-size: cover;
}
form{
    position: relative;
    display: flex;
    justify-content: center;
    width: 100vw;
}
.input{
    margin-left: 40px;
    font-size: 15px;
    height: 40px;
    width: 200px;
    border: none;
    border-radius: 5px;
}
ul{
    height: 18.875em;
    width: 34em;
    margin: 5em auto;
    padding: 3em 0 0 3em;
    position: relative;
    border: 1px solid #160801;   
    border-radius: 1em;
    border: 1px solid white;
}
li{
    margin: 0;
    padding: 0;
    list-style: none;
    position: relative;
    float: left;
}
ul .white{
    height: 16em;
    width: 4em;
    z-index: 1;
    border-left: 1px solid #bbb;
    border-bottom: 1px solid #bbb;
    border-radius: 0 0 5px 5px;
    box-shadow: -1px 0 0 rgba(255,255,255,0.8) inset,0 0 5px #ccc inset,0 0 3px rgba(0,0,0,0.2);
    background: linear-gradient(to bottom,#eee 0%,#fff 100%);
}
ul .white:active{
    border-top:1px solid #777;
    border-left:1px solid #999;
    border-bottom:1px solid #999;
    box-shadow:2px 0 3px rgba(0,0,0,0.1) inset,-5px 5px 20px rgba(0,0,0,0.2) inset,0 0 3px rgba(0,0,0,0.2);
    background:linear-gradient(to bottom,#fff 0%,#e9e9e9 100%);
}
.black{
    height:8em;
    width:2em;
    margin:0 0 0 -1em;
    z-index:2;
    border:1px solid #000;
    border-radius:0 0 3px 3px;
    box-shadow:-1px -1px 2px rgba(255,255,255,0.2) inset,0 -5px 2px 3px rgba(0,0,0,0.6) inset,0 2px 4px rgba(0,0,0,0.5);
    background:linear-gradient(45deg,#222 0%,#555 100%);
}
.black:active{
    background:linear-gradient(to right,#444 0%,#222 100%);
}
#three, #five, #seven, #ten, #twelve{
    margin:0 0 0 -1em;
}
ul li:first-child{
    border-radius:5px 0 5px 5px;
}
ul li:last-child{
    border-radius:0 5px 5px 5px;
}

@media(max-width: 550px){
    h1{
        display: flex;
        width: 400px;
        margin-left: 20vw;
    }
    form{
        width: 135vw;
        display: flex;
        justify-content: center;
    }
    .para{
        width: 145vw;
        padding: 2px;
        background-color: black;
        text-align: center;
        display: flex;
        justify-content: center;
    }
}