div#heatNumberDiv input {
    width: 100px;
    text-align: center;
}
div#heatNumberDiv {
    padding-left: 20px;
}

div#coversSelectDiv select {
    width: 120px;
    text-align: center;
}

.modal {
    width:400px;
}

#startDatetimeDiv,
#startDatetime {
    min-width: 220px;
}