* {
            box-sizing: border-box;
        }

        ul {
            list-style-type: none;
        }

        body {
            font-family: Verdana, sans-serif;
        }

        .month {
            padding: 70px 25px;
            width: 100%;
            background: #1abc9c;
            text-align: center;
        }

        .month ul {
            margin: 0;
            padding: 0;
        }

        .month ul li {
            color: white;
            font-size: 20px;
            text-transform: uppercase;
            letter-spacing: 3px;
        }

        .month .prev {
            float: left;
            padding-top: 10px;
        }

        .month .next {
            float: right;
            padding-top: 10px;
        }

        .cal_dt_weekdays {
            margin: 0;
            padding: 20px 0;
            background-color: #ddd;
            width: 40%;
        }

        .cal_dt_weekdays li {
            display: inline-block;
            width: 12%;
            color: #666;
            text-align: center;
        }

        .cal_dt_days {
            margin: 0;
            padding: 20px 0;
            background-color: #eee;
            width: 40%;
        }

        .cal_dt_days li {
            list-style-type: none;
            display: inline-block;
            width: 12%;
            text-align: center;
            margin-bottom: 20px;
            font-size: 20px;
            color: #777;
        }

        .cal_dt_days li .active {
            padding: 5px;
            background: #b3168a;
            color: white !important
        }

        /* Add media queries for smaller screens */
        @media screen and (max-width:720px) {

            .cal_dt_weekdays li,
            .cal_dt_days li {
                width: 12%;
            }
        }

        @media screen and (max-width: 420px) {

            .cal_dt_weekdays li,
            .cal_dt_days li {
                width: 12.0%;
            }

            .cal_dt_days li .active {
                padding: 2px;
            }
        }

        @media screen and (max-width: 290px) {

            .cal_dt_weekdays li,
            .cal_dt_days li {
                width: 12%;
            }
        }