.calendar {
    display: flex;
    flex-direction: column;
}

.calendar-header {
    display: flex;
}

.calendar-day {
    flex: 1;
    text-align: center;
    font-weight: bold;
    padding: 10px;
    border: 1px solid #ddd;
}

.calendar-body {
    display: flex;
}

.calendar-column {
    flex: 1;
    min-height: 400px;
    border: 1px solid #ddd;
    padding: 5px;
    position: relative;
}

.reservation {
    margin: 5px 0;
    padding: 5px;
    border-radius: 5px;
    font-size: 14px;
    text-align: center;
}