_day-picker.scss

.app__body {
    .DayPicker {
        font-size: inherit;
        width: 100%;
        margin-top: 0.3rem;

        .DayPicker-NavBar {
            position: relative;
        }

        .DayPicker-Caption {
            border-bottom: 1px solid transparent;
            margin: 0 0.5rem .7rem;
            padding: 0 0.5rem .7rem;

            >div {
                font-size: inherit;
            }
        }

        .DayPicker-Day {
            border-radius: $border-rad * 2;
        }

        .DayPicker-wrapper {
            padding: 0;
        }

        .DayPicker-NavButton {
            top: 0;
            right: .5rem;
            margin-top: 2px;
            outline: none;
        }

        .DayPicker-Weekday {
            font-weight: bold;
            color: inherit;
        }

        .DayPicker-Month {
            width: 100%;
            margin: 0;
        }
    }
}