.calendar {
    width: 60px;
    text-align: center;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    overflow: hidden;
    margin-right: 15px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.calendar-month {
    display: block;
    background: #6c757d;
    color: #fff;
    font-size: 12px;
    text-transform: uppercase;
    padding: 2px 0;
    font-weight: bold;
}

.calendar-day {
    display: block;
    font-size: 20px;
    font-weight: bold;
    padding: 6px 0;
    background: #fff;
    color: #333;
}

.border-dashed-bottom {
    border-bottom: 1px dashed #ccc;
}