.hint {
    width: 100%;
    text-align: center;
    color: #D6FDFF;
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 20px;
    clear: both;
}

.panel-item {
    height: 40px;
    line-height: 40px;
}

.panel-item > label {
    font-weight: normal;
}

.panel-item > button {
    width: 80px;
    text-align: center;
    padding: 0;
    background-color: #244E5F;
    color: #D6FDFF;
}

.panel-item > button:hover {
    background-color: #548CA9;
}

.item-label {
    width: 150px;
    display: inline-block;
    color: #D6FDFF;
    font-size: 18px;
    padding-left: 30px;
}

.panel-item > span {
    color: #D6FDFF;
    font-size: 18px;
}

#selector > main > div {
    width: 24%;
    float: left;
    padding: 10px;
    box-sizing: border-box;
    position: relative;
}

#startTrain, #stopTrain{
    text-align: center;
    cursor: pointer;
    outline: none;
    border: none;
}