.calendar {
    position: relative;
    overflow: hidden;
    text-align: center;
    font: 15px/1em inherit;
    color: #fff;
}

.calendar h1, .calendar h2, .calendar h3, .calendar h4, .calendar h5, .calendar h6 {
    color: #fff;
}

.calendar a {
    text-decoration: none;
    color: inherit;
}

.calendar header .simple-calendar-btn {
    display: inline-block;
    position: absolute;
    width: 30px;
    height: 30px;
    text-align: center;
    line-height: 30px;
    color: #CBD1D2;
    border-radius: 50%;
    background-color: rgba(71, 169, 180, 0.8);
    border: 2px solid #CBD1D2;
    margin-top: 10px;
    margin-left: 10px;
    margin-right: 10px;
}

.calendar header .simple-calendar-btn:hover {
    background-color: rgba(71, 169, 180, 1);
    color: white;
}

.calendar header .simple-calendar-btn:before {
    content: '';
    position: absolute;
    top: 9px;
    left: 8px;
    width: 8px;
    height: 8px;
    border-style: solid;
    border-width: 3px 3px 0 0;
    transform: rotate(45deg);
    transform-origin: center center;
}

.calendar header .btn-prev {
    top: 0;
    left: 0;
    transform: rotate(-180deg);
}

.calendar header .btn-next {
    top: 0;
    right: 0;
}

.calendar header .btn-next:before {
    transform: rotate(45deg);
}

.calendar header .month {
    padding: 0;
    margin: 0;
}

.calendar header .month .year {
    font-size: 0.6em;
    font-weight: 100;
}

.calendar table {
    width: 100%;
    margin: 20px 0 0 0;
    border-spacing: 0px;
}

.calendar thead {
    font-size: 1.2em;
    font-weight: 600;
}

.calendar td {
    padding: .6em .1em;
}

.calendar .day {
    position: relative;
    display: inline-block;
    width: 2.5em;
    height: 2.5em;
    line-height: 2.2em;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
}

.calendar .day:hover {
    border: 2px solid #6691CC;
}

.calendar .day.today {
    background: rgba(255,255,255,0.2);
    color: white;
}

.calendar .day.today.has-event:after {
    background: white;
}

.calendar .day.wrong-month {
    color: #CBD1D2;
}

.calendar .day.wrong-month:hover {
    border: 2px solid transparent;
}

.calendar .day.has-event {
    color: #165d64;
    font-weight: bold;
    background-color: rgba(255,255,255,0.6);
}

.calendar .day.has-event:after {
    content: '';
    position: absolute;
    top: calc(50% + 10px);
    left: calc(50% - 2px);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #165d64;
}

.calendar .day.disabled {
    cursor: default;
}

.calendar .day.disabled:hover {
    border: 2px solid transparent;
}

.calendar .event-container {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 20px;
    padding-top: 70px;
    background: #545A5C;
    box-sizing: border-box;
}

.calendar .event-container .event-wrapper {
    overflow-y: auto;
    max-height: 100%;
}

.calendar .event-container .close {
    position: absolute;
    width: 30px;
    height: 30px;
    top: 20px;
    right: 20px;
    cursor: pointer;
}

.calendar .event-container .close:before, .calendar .event-container .close:after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 2px;
    height: 100%;
    background-color: #CBD1D2;
}

.calendar .event-container .close:before {
    transform: rotate(45deg);
}

.calendar .event-container .close:after {
    transform: rotate(-45deg);
}

.calendar .event-container .event {
    position: relative;
    width: 100%;
    padding: 1em;
    margin-bottom: 1em;
    background: #15998d;
    border-radius: 4px;
    box-sizing: border-box;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.12);
    text-align: left;
    color: white;
    cursor: pointer;
}

.calendar .event-container .event-date {
    margin-bottom: 1em;
}

.calendar .event-container .event-hour {
    float: right;
}

.calendar .event-container .event-summary {

}

.calendar .filler {
    position: absolute;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(84,90,92,0.8);
    transform: translate(-50%, -50%);
}

.calendar h2 {
    font-size: 25px;
}

.calendar .day.closed::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 10%;
    width: 80%;
    height: 2px;
    background-color: red; /* Farbe des Strichs */
    transform: rotate(-45deg);
    transform-origin: center;
    pointer-events: none;
}

.calendar .day.closed {
    background-color: rgba(255,255,255,0.3);
}