body {
    text-align: center;
    background-color: gray;
    font-family: "Lato", sans-serif;
    font-weight: 300;
    box-sizing: border-box;
    display: block;
}

#main {
    width: 100%;
    display: -webkit-flex;
    display: flex;
    flex-wrap: wrap;
    padding: 0;
    margin-right: auto;
    margin-left: auto;
}

#sidebar {
    width: 200px;
    margin-left: auto;
    order: 0;
    text-align: center;
}

.sidebar-item {
    margin-top: 30px;
    margin-bottom: 30px;
}

#game {
    width: 768px;
    min-width: 768px;
    order: 1;
    display: -webkit-flex;
    display: flex;
    flex-wrap: wrap;
    margin-right: auto;
}

header {
    width: 100%;
    font-family: sans-serif;
    font-size: 30px;
    order: 0;
}

canvas {
    width: 100%;
    order: 1;
    margin-right: auto;
    margin-left: auto;
}

p {
    margin: 5px;
    font-size: 25px;
}

span {
    font-size: 20px;
}

button {
    margin: 10px;
}

#btn1 {
    margin-top: 65px;
    height: 74px;
}

#spinner {
    width: 30px;
    height: 36px;
    text-align: center;
    font-size: 20px;
}

#selectmenu {
    width: 140px;
    height: 90px;
    padding: 0;
}

.helpbox {
    margin-top: 42px;
}

#dialog-link {
    padding: .4em 1em .4em 20px;
    text-decoration: none;
    font-size: 20px;
    position: relative;
    font-family: sans-serif;
    margin-top: 30px;
}

#dialog-link span.ui-icon {
    margin: 0 5px 0 0;
    position: absolute;
    left: .2em;
    top: 50%;
    margin-top: -8px;
}

@media only screen and (max-width: 1024px) {

    #sidebar {
        min-width: 768px;
        order: 1;
        margin-right: auto;
        margin-left: auto;
        display: -webkit-flex;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
    }

    #game {
        order: 0;
        margin-right: auto;
        margin-left: auto;
    }

    #btn1 {
        margin-top: 12px;
    }
}