body {
    background-color: darkblue;
    background-image: linear-gradient(to bottom, #0D177E, #6C76D6);
    color: white;
    /*To ensure gradient goes to bottom of page*/
    margin: 0;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

#main-container {
    border-style: none;
    border-width: 0px;
    margin: auto;
}

#options-header {
    margin-top: 20px;
}

#game-content {
    margin-top: 20px;
}

#options-header-text {
    display: inline-block;
}

input[type=checkbox]
{
    /* Double-sized Checkboxes */
    -ms-transform: scale(2); /* IE */
    -moz-transform: scale(2); /* FF */
    -webkit-transform: scale(2); /* Safari and Chrome */
    -o-transform: scale(2); /* Opera */
    transform: scale(2);
}

select
{
    font-family: Arial;
}

.start-buttons {
    font-family: Arial;
    color: white;
    border: 2px solid white;
}

#start-game-button {
    background: url("/images/play.png");
    background-repeat: no-repeat;
}

#options-button {
    background: url("/images/settings.png");
    background-repeat: no-repeat;
}

.back-buttons {
    background: url("/images/previous-white-on-transparent.png");
    background-repeat: no-repeat;
    color: white;
}

.back-buttons:active {
    background: url("/images/previous-black-on-white.png");
    background-repeat: no-repeat;
}

#start-view {
    margin-left: auto;
    margin-right: auto;
}

#game-view {
    margin-left: auto;
    margin-right: auto;
}

#options-view {
    margin-left: auto;
    margin-right: auto;
}

#back-button {
    vertical-align: top;
}

.scoreboard-item {
    display: inline-block;
}

.scoreboard-header {
    float: left;
}

.scoreboard-label {
    font-family: Arial;
    display: inline-block;
    vertical-align: top;
}

.scoreboard-indicator-container {
    background-color: white;
}

.scoreboard-indicator {
    font-family: Arial;
    margin: 0 auto;
    color: black;
    text-align: center;
}

#math-question {
    font-family: Arial;
}

.math-element {
    display: inline-block;
    text-align: center;
}

.math-operator {
    display: inline-block;
    text-align: center;
}

.math-answer {
    display: inline-block;
}

#math-buttons {
    background-color: black;
}

.number-button {
    background-color: black;
    color: white;
    border: 2px solid white;
}

.option-container {
    width: 100%;
}

.option-heading {
    font-family: Arial;
}

.option-item {
    font-family: Arial;
}

.option-label {
    display: inline;
}

.option-selector {
    float: right;
}

#modal-background {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    opacity: .50;
    -webkit-opacity: .5;
    -moz-opacity: .5;
    filter: alpha(opacity=50);
    z-index: 1000;
}

#modal-container {
    background-color: white;
    box-shadow: 0 0 20px 0 #222;
    -webkit-box-shadow: 0 0 20px 0 #222;
    -moz-box-shadow: 0 0 20px 0 #222;
    display: none;
    left: 50%;
    position: absolute;
    z-index: 1000;
}

#modal-background.active, #modal-container.active {
    display: block;
}

#time-is-up-message {
    font-family: Arial;
    font-size: 18pt;
    color: black;
}

#time-up-button-container {
    text-align: center;
}

.time-up-button {
    font-family: Arial;
    font-size: 12pt;
    color: black;
    width: 110px;
    margin-top: 30px;
    margin-right: 10px;
}