body {
    background: #deddde;
    background: #111111;
    background: url(../img/body-bg.jpg);
}

#bg-music{
    display:none; 
}

footer{
    width: 100%;
    text-align: center;
    position: absolute;
    bottom: 0; 
    color: #aaa;
    font-family: monospace;
}

article {
    max-width: 960px;
    margin: 0 auto;
    border: 1px solid #aaa;
    height: 600px;
    padding: 20px;
    background: #ffffff;
    background: url(../img/math-bg.jpg);
    border-radius: 20px;
    display:none;
}

h1{
    background: rgba(0,0,0,.5);
    text-align: center;
    color: #FFF;
    font-size: 2.5em;
    margin: 0 0 2.5rem 0;
    font-weight: 400;
    text-shadow: 2px 2px 5px #000;
    color: #F90;
}




.app{
    float: left;
    margin-right: 20px;
    width: 28%;
    height: 360px;
    background: rgba(240,249,255,.7);
    padding-left: 20px;
    border-radius: 20px;
}

.app h2{
    color: #333;
    font-size: 2rem;
    margin: 12px 0;    
}
.app-panel{
    display:none;   
}
.num {
    width: 80%;
    text-align: right;
    font-size: 3rem;
}

input {
    border: 0;
    text-align: right;
    border-top: solid 2px #aaa;
}
.start {
    font-size: 36px;
    color: green;
    font-weight: 800;
    border: 1px solid green;
    width: 120px;
    text-align: center;
    margin: 100px auto 10px auto;
    padding: 20px;
    border-radius: 10px;
    background: rgba(240,249,255,.7);
}
.start:hover{
    cursor: pointer;
     background: rgba(240,249,255,.5);
}   
a.skip {
    font-size: 24px;
    font-weight: 800;
    border: 1px solid green;
    width: 120px;
    text-align: center;
    margin: 20px auto 10px auto;
    padding: 8px 16px;
    border-radius: 10px;
    background: rgba(240,249,255,.15);
    display: block;
    text-decoration: none;
    color: #393;
}
.skip:hover{
    background: rgba(240,249,255,.25);
}  
.next {
    font-size: 36px;
    color: green;
    font-weight: 800;
    border: 1px solid green;
    width: 120px;
    text-align: center;
    margin: 10px auto;
    padding: 20px;
    border-radius: 10px;
    background: rgba(240,249,255,.7);
    display:none;
}
.next:hover{
    cursor: pointer;
     background: rgba(240,249,255,.5);
}   



.feedback{
    float: left;
    margin-right: 20px;
    width: 340px;
    height: 70px;
    min-height: 100px;
}
.feedback-content{
	width: 100%;
	height: 100%;
	vertical-align: bottom;
	padding-top: 145px;
	font-size: 5rem;
	text-align: center;
	border-radius: 20px;
	font-weight: 600;
	color: #a00;
}
.feedback-content.correct{
    background: url(../img/correct.png) no-repeat top center #fff;
    background-size: contain;
}
.feedback-content.incorrect{
    background: url(../img/incorrect.png) no-repeat center 20px #fff;
}
.feedback-content.done{
    background: url(../img/good-job.jpg) no-repeat top center;
    border-radius: 20px;
}
.feedback-content.try-again{
    background: url(../img/try-again.jpg) no-repeat top center;
    border-radius: 20px;
    background-size: cover;
}

.score-panel{
    float: left;
    margin-right: 20px;
    height: 360px;
    width: 24%;
    text-align: right;
    background: rgba(0,0,0,.7);
    color: #cc0;
    padding: 0 20px;
}
.score-panel h2{
    color: #ffffff;
    font-size: 2rem;
    margin: 12px 0;
}   
.score-panel span {
    width: 40px;
    display: inline-block;
}

.welcome {
    color: #fff;
    font-size: 40px;
    margin-top: 120px;
    font-family: cursive;
    text-align: center;    
}

.timer {
    color: #fff;
    font-size: 70px;
    margin-top: 90px;
}

.timer.dimmed{
  opacity: .25;	
}


.app-mode {
    float: left;
    font-size: 2rem;
    color: #666;
    margin: 25px 10px;
    letter-spacing: 2px;
}
.app-mode a{
    font-size: 80px;
    color: #cfc;
    display: inline-block;
    width: 100px;
    border: 1px solid;
    text-align: center;
    border-radius: 60px;
    margin: 20px 10px;
    line-height: 100px;
    opacity: .3;
    text-decoration: none;
}
.app-mode a.selected{
    color:#fff;   
    opacity: .6;
}

.app-mode a:hover {
    cursor: pointer;
    color: #a00;
    opacity: .9;
}
.app-mode a.selected:hover {
    color: #fff;
    opacity: .6;
    cursor: auto;
    
}

.app-version{
    text-align: right;
    margin-top: 145px;
    color: #999;
    font-size: .75rem;
}


.volume {
	float: right;
	margin: 90px 20px 0 0;
	color: #fff;
	text-transform: uppercase;
}