.hidden{
    display: none;
}
body{
    background-image: linear-gradient(to right, #5c492d, #22492f);
    color: white;
    font-family: sans-serif;
    font-size: 125%;
    text-align: center;
}
#level{
    width:158px;
    height:27px;
    font-size:75%;
    border-radius: 3px;
    cursor: pointer;
}
#start_button{
    width:100px;
    height:50px;
    background-color: white;
    font-size:125%;
    font-family: Helvetica,sans-serif;
    border: 1px solid greenyellow;
    display:block;
    margin-top: 40px;
    margin-left: auto;
    margin-right:auto;
    border-radius: 5px;
    cursor: pointer;
}
#card_container{
    border: 1px solid #cfc698;
    margin: auto;
    padding: 5px;
}
#leader_board{
    position:relative;
    margin:auto;
    width:900px;
    height:191px;
    border: 1px solid white;
}
.centered {
    text-align:center;
}
.spaced{
    position: relative;
    margin-top:10px;
}
.box {
    width:300px;
    height:150px;
    border: 1px solid #ffffff;
    float: left;
    text-align: left;
    padding-left:10px;
    box-sizing: border-box;
}
#restart {
    position: relative;
    display: block;
    margin: auto;
    width: 110px;
    height: 50px;
    background-color: #f2e706;
    cursor: pointer;
}