*{
  margin:0;
  padding:0;
  border:0;
  box-sizing:border-box;
  font-family: 'Source Sans Pro';
  font-weight: 400;
  font-style: normal;
}
#canvas {
    background: #9daf7f;
    box-shadow: 0px 0px 6px 1px #000, 0 0 18px #fff;
    margin-top: 10px
}
body{
    background: #424242;
    height: 100vh;
}

.clearfix::after{
    content: '';
    display: table;
    clear: both;
}

.clearfix::before{
    content: '';
    display: table;
    clear: both;
}

#container {
    display: table;
    margin: 0 auto;
}

.key-button {
    display: inline-block;
    color: #fff;
    background-color: #1f1f1f;
    height: 30px;
    line-height: 28px;
    text-align: center;
    border-radius: 2px;
    border: 1px solid #000;
    box-shadow: 0 0 0px 3px #737373;
    font-size: 12px;
    margin-right: 10px;
}

.key-button.arrow-key {
    width: 30px;
}

.key-button.space-key {
    width: 150px;
}

.key-button.enter-key {
    width: 80px;
}

.setting-group {
    display: block;
    margin: 0 18px;
}

.infosep {
    margin: 25px 0;
    color: #fff;
}

.game-setting-info {
    display: table;
    margin: 15px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    position: absolute;
    left: 0;
    top: 0;
    cursor: default;
}

.setting-tip {
    font-size: 14px;
    margin: 0 18px 18px 18px;
    color: #fff;
    font-style: italic;
    text-decoration: underline;
}

.game-setting-config {
    display: table;
    margin: 30px auto 0;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    padding: 20px;
}

@media screen and ( max-width:1024px ) {
    .setting-group {
        display: inline-block;
        margin: 0 18px;
    }

    .game-setting-info {
        display: table;
        margin: 20px auto 0;
        background-color: rgba(255, 255, 255, 0.1);
        border-radius: 4px;
        position: static;
    }
}