html{
    width: 100%;
    height: 100%;
    overflow: scroll;
}
body {
    width: 100%;
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;

    background: linear-gradient(to bottom right, #ECE9E6, #FFFFFF);
    /*
    #74ebd5, #ACB6E5
    #000046, #1CB5E0
    #F0F2F0, #000C40*/
    background-repeat: no-repeat;
    background-size:  cover;
}

.button {
    background: transparent;

    font-family: "Computer Modern", serif;

    text-align: center;

    outline: none;
    border: 1px solid black;
}
.button:hover  { background-color: #ECE9E6 }
.button:active { background-color: darkgray; }

.mathContainer {
    font-size: 1.5em;
    -webkit-margin-before: 1em;
    -webkit-margin-after: 1em;
    -webkit-margin-start: 0;
    -webkit-margin-end: 0;
    font-weight: bold;
}

.mainContainer {
    overflow:auto
}
.questionContainer{
    float:left;
    width: 50%;
}
.helpContainer{
    float:left;
    width: 47.5%;
}
.helpDiv {
    margin-left: 5%;
}
p {
    font-size: 1.5em;
}


@media only screen and (max-width:1000px) {
    /* For mobile phones: */
    .questionContainer, .helpContainer {
        width:100%;
    }
}

.centerImage {
    display: block;
    position:absolute;
    top:0;
    bottom:0;
    left:0;
    right:0;
    margin:auto;
}

.horizontalCenter {
    display: block;
    left: 0;
    right: 0;
    margin: auto;
}