Full Calendar scheduler increasing height of event bars in timeline - css

Question

I've been using Full Calendar Scheduler for a while now in order to create a calendar for a client, except the "events" are just job allocation times.
I've styled up the calendar itself to suit the client, but the actual event bars that appear on the calendar after the data has been fed through are only about half the height of the actual time slot. I'm aware that this is likely to be for the purpose of overlapping events in general, but this will never happen in this case, so is there a way of increasing the height of the event bar to 100% of the time slot? I've tried in the CSS but it never works.
This is in timeline view, for a week, going horizontally rather than vertically. I have attached a screenshot as an example.
EDIT: Code for calendar
JS:
$('#calendar').fullCalendar({
resourceAreaWidth: "20%",
editable: true,
aspectRatio: 2.5,
scrollTime: '08:00',
minTime: '08:00',
maxTime: '22:00',
firstDay: 1,
header: {
left: 'promptResource today prev,next',
center: 'title',
right: 'timelineDay,timelineWeek,timelineMonth'
},
customButtons: {
},
defaultView: 'timelineWeek',
views: {
timelineWeek: {
type: 'timeline',
slotWidth: 60,
slotDuration: '02:00',
duration: { days: 6 }
}
},
slotLabelFormat: [
'dddd D/M/YY',
'h:mma'
],
events: [
{ id: '1', resourceId: '1', start: '2016-10-24 08:00:00', end: '2016-10-24 10:00:00', title: 'TESTREF001', url: 'null' },
],
resourceLabelText: 'Staff',
resources: [
{ id: '1', title: 'John Doe' },
]
});
CSS:
.fc-widget-header > .fc-cell-content > .fc-cell-text {
font-family: 'Oswald', sans-serif;
font-weight: 400 !important;
padding-top: 12px;
}
.fc-widget-header > .fc-cell-content {
background: #e4dbff;
}
.fc-time-area .fc-widget-header {
background: #e4dbff !important;
text-align: center !important;
}
.fc-unthemed th, .fc-unthemed td, .fc-unthemed thead, .fc-unthemed tbody, .fc-unthemed .fc-divider, .fc-unthemed .fc-row, .fc-unthemed .fc-content, .fc-unthemed .fc-popover, .fc-unthemed .fc-list-view, .fc-unthemed .fc-list-heading td {
border-color: #AAA !important;
}
.fc-body .fc-resource-area .fc-cell-content, .fc-body .fc-resource-area .fc-widget-content > div {
background: #f9f2c7;
font-family: 'Oswald', sans-serif;
font-weight: 400;
}
.fc-widget-header > div > .fc-cell-content > .fc-cell-text {
font-family: 'Oswald', sans-serif;
font-weight: 400 !important;
font-size: 24px;
padding-top: 12px;
}
.fc-widget-header {
background: #f9f2c7;
}
.fc-widget-content.fc-major {
background: #fff2e7;
border-collapse: collapse;
}
.fc-resource-area .fc-scroller-canvas {
background: #f9f2c7;
}