.ans_icon{ height: 14px; }

#progress, #solution{
    margin-bottom: 75px;
}

#main_icon{
    background-image: url(../img/activity.png);
    background-position: center center;
    background-repeat: no-repeat;
}

#main_nav{
    text-align: right;
    padding-left: 5%;
    padding-right: 5%;
}

.nav_button{
    background: #1696d7;
    border: 1px solid #fff;
    margin: auto;
    margin-top: 5px;
    width: 110px;
}

div.nav_button:hover{
    background: #f08734;
    border: 1px solid #fff;
}

div.item_slideshow{
    position: relative;
    display: block;
    margin: auto;
    padding: auto;
}

div.item{
    position: absolute;
    display: block;
    left: 0; right: 0; top: 0;
    opacity: 0;
    text-align: center;
    padding: 5px;
    padding-bottom: 25px;
    color: #02202f;
    overflow:hidden;
}

div.item.show{
    position: relative;
    opacity: 1;
    transition: 0.5s opacity;
}

table{
    position: relative;
    margin: auto;
    margin-top: -15px;
    display: table;
}

td{
    padding: 5px;
}

#progress table td, #solution table td{padding: 10px;}

#main_content input{
    width: 22px;
    height: 22px;
    padding: 2px;
    vertical-align: middle;
    text-align: center;
    border: 2px solid #0e6891;
    border-radius: 5px;
    background-color: #fff;
    color: #0e6891;
    font-weight: bold;
}

#main_content input.opt{
    border: none;
    background: #189adc;
    box-shadow: 2px 3px #0e6891; 
    width: 30px;
    height: 30px;
    color: #fff;
}

#main_content input.opt:hover{ box-shadow: 1px 2px #0e6891; cursor: pointer; }
#main_content input.opt:active{ box-shadow: 2px 3px #0e6891; }

span.choice{ color: #f08734; font-weight: bold; margin-left: 5px;}