body{
    background-color: #292929;
}

.tab{
    margin-top: 50px;
    background-color: #fff;
    font-size: 15px;
    margin-left: 50%;
    transform: translateX(-50%);
    display: inline-block;
    box-sizing: border-box;
}
.tab_header{
    position: relative;
    background: url('../img/bg.jpg');
    background-size:auto 100%;
}
.tab_header a{
    width: 64px;
    height: 64px;
    position: absolute;;
    left: 50%;
    top: 50%;
    margin-left: -32px;;
    margin-top: -30px;
    display: block;
    z-index: 1;
    background-size: 100%;
}
.tab_header>a>img{
    width: 100%;
    height: 100%;
    display: block;
}
.tab_main{
    padding: 5px 10px;
    box-sizing: border-box;
}

.tab_main>p{
    color: #848484;
    box-sizing: border-box;

}
#controlBar{
   
}
#myCanvas{
    margin: 0 auto;
}
input{
    width: 100px;
    border: none;
    background-color: #eee;;
    padding: 5px;
}
#controlBar label{
    margin: 0 10px;
}
#controlBar div{
    padding: 5px;
}
.tab_main button{
    width: 100%;
    margin: 10px 0;
}