ar-design/dist/assets/css/components/form/date-picker/calendar/content.css

AR Design is a (react | nextjs) ui library.

.ar-date-calendar > .content {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  gap: 1rem;
  margin: 0.5rem;
}
.ar-date-calendar > .content > .calendar {
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  gap: 1rem 0;
}

/* #region Weekdays */
.ar-date-calendar > .content > .calendar > .weekdays {
  display: flex;
  flex-wrap: nowrap;
}
.ar-date-calendar > .content > .calendar > .weekdays > span {
  width: calc(100% / 7);
  color: var(--gray-600);
  font-size: 0.8rem;
  text-align: center;
  user-select: none;
}
/* #endregion Weekdays */
/* Weekdays */

/* #region Days */
.ar-date-calendar > .content > .calendar > .days {
  display: flex;
  flex-wrap: wrap;
  user-select: none;
}
.ar-date-calendar > .content > .calendar > .days > span {
  display: flex;
  justify-content: center;
  align-items: center;
  width: calc(100% / 7);
  height: var(--input-height);
  cursor: pointer;
}
.ar-date-calendar > .content > .calendar > .days > span > span {
  display: grid;
  justify-content: center;
  align-content: center;
  width: 75%;
  height: 75%;
  border-radius: var(--border-radius-sm);
}
.ar-date-picker > .calendar-wrapper > .content > .calendar > .days > span:not(.empty-day) > span:hover {
  background-color: var(--gray-200);
  color: var(--gray-700);
}
.ar-date-calendar > .content > .calendar > .days > span.selection-day > span {
  background-color: var(--primary);
  color: var(--white);
  box-shadow: 0 0 0 2px var(--white), 0 0 0 4px var(--primary);
}
/* #endregion Days */
/* Days */