html {
    height: 100%;
}

body {
    /*background-color: #333232;*/
    background-color: #848484;
    background: linear-gradient(223.88deg, #848484 8.89%, #000000 94.31%) no-repeat;
    /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
    height: 100%;
    margin: 0;
    background-repeat: no-repeat;
    background-attachment: fixed;
    overflow: hidden;
}




#container {
    height: 200px;
    width: 500px;
    border: 10px solid #30BCED;
    margin: auto;
    margin-top: 50px;
    background-color: #F4F7BE;
}

h1 {
    text-align: center;
    color: white;
}

#number {
    height: 25px;
    width: 250px;
    margin: auto;
    margin-top: 50px;
    border: 1px solid black;
    text-align: center;
    background-color: white;
}


#increment {
    height: 25px;
    width: 100px;
    margin-top: 50px;
    margin-left: 125px;
}

#decrement {
    height: 25px;
    width: 100px;
    margin-top: 50px;
    margin-left: 50px;
}