.maintable {
    border: 2px solid blue;
    border-spacing: 5px;
    font-family: sans-serif;
    width: 100%;
}

.maintable td {
    border: 1px solid blue;
    margin: 2px 2px 2px 2px;
    padding: 2px 2px 2px 2px;
}

.subtable {
    border: 0px solid green;
    margin: 2px 2px 2px 2px;
    padding: 2px 2px 2px 2px;
}

.subtable td {
    border: 0px solid red;
}

.maintable .monday, .maintable .tuesday, .maintable .wednesday,
.maintable .thursday, .maintable .friday {
    background-color: yellow;
    width: 18%;
}

.maintable .week, .maintable .monday, .maintable .tuesday,
.maintable .wednesday, .maintable .thursday, .maintable .friday {
    color: darkgreen;
    font-size: large;
    font-weight: bold;
}

.week_cell {
    border: 0px solid blue;
    background-color: yellow;
    height:75px;
    vertical-align:bottom;
}

.week_cell .subtable {
    float: right;
}

.month {
    color: crimson;
    font-size: large;
    font-weight: bold;
}

.week_number {
    text-align: right;
    color: darkblue;
    font-size: small;
    font-weight: bold;
}

.calendar_day {
    color: gray;
    font-size: x-small;
    font-weight: bold;
}

.class_day {
    color: darkgreen;
    font-size: x-small;
    font-weight: bold;
}

.break {
    color: gray;
    font-size: x-small;
    font-weight: bold;
}

.assignment_due {
    color: darkblue;
    font-size: x-small;
    font-weight: bold;
}

.exam_day {
    color: red;
    font-size: x-small;
    font-weight: bold;
}