table.calendar {
    border: 1px solid transparent;
    border-collapse: collapse;
}
table.calendar .left_col {
    min-width: 200px;
}
table.calendar td, table.calendar th {
    border: 1px solid transparent;
    padding: 5px 5px;
}
table.calendar th {
    text-align: left;
    padding: 5px 15px;
}

table.calendar_ thead th {
    position: -webkit-sticky; /* for Safari */
    position: sticky;
    top: 0;
}

table.calendar_ tbody th {
    position: -webkit-sticky; /* for Safari */
    position: sticky;
    left: 0;
}
table.calendar_ thead th:first-child {
    left: 0;
    z-index: 1;
}
table.calendar .time_header {
    overflow: hidden;
    width: auto;
    height: 17.5px;
}
.time_header div {
    position: absolute;
    margin-top: -8px;
    overflow: hidden;
}
div.calendar_order {
    position: absolute;
    height: 44px;
    vertical-align: middle;
    text-align: center;
}
div.calendar_order a {
    margin-top: 4px;
    padding: 8px 0px;
    display: block;
    overflow: hidden;
}

.light_mode table.calendar {
    border: 1px solid #CCC;
}
.light_mode table.calendar td, table.calendar th {
    border: 1px solid #CCC;
}
.light_mode div.calendar_order a {
    color: #fff;
}
.light_mode .calendar_weekend {
    background-color: #fff2e0;
}