flatpickr_plus/dist/plugins/monthSelect/style.css

A lightweight, powerful javascript datetime picker with additional locale year support and year dropdown

.flatpickr-monthSelect-months {
  margin: 10px 1px 3px 1px;
  flex-wrap: wrap;
}

.flatpickr-monthSelect-months .flatpickr-day {
  width: 31.35%;
  -webkit-flex-basis: 31.35%;
  -ms-flex-preferred-size: 31.35%;
  flex-basis: 31.35%;
  max-width: 100%;
  height: auto;
  line-height: 45px;
  margin: 3px;
}

.flatpickr-monthSelect-months .flatpickr-day:hover,
.flatpickr-monthSelect-months .flatpickr-day.selected {
  border-radius: 50px;
}

.flatpickr-monthSelect-months .flatpickr-day.flatpickr-disabled:before {
  /* content: '';
  left: 50%;
  transform: translateX(-50%);
  top: 50%;
  position: absolute;
  width: 30%;
  text-decoration: line-through;
  border-top: 0.5px solid rgba(255,255,255,0.5); */
}

.flatpickr-monthSelect-month {
  background: none;
  border: 1px solid transparent;
  border-radius: 4px;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  color: #393939;
  cursor: pointer;
  display: inline-block;
  font-weight: 400;
  margin: 0.5px;
  justify-content: center;
  padding: 10px;
  position: relative;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  text-align: center;
  width: 33%;
}

.flatpickr-monthSelect-month.flatpickr-disabled {
  color: #eee;
}

.flatpickr-monthSelect-month.flatpickr-disabled:hover,
.flatpickr-monthSelect-month.flatpickr-disabled:focus {
  cursor: not-allowed;
  background: none !important;
}

.flatpickr-monthSelect-theme-dark {
  background: #3f4458;
}

.flatpickr-monthSelect-theme-dark .flatpickr-current-month input.cur-year {
  color: #fff;
}

.flatpickr-monthSelect-theme-dark .flatpickr-months .flatpickr-prev-month,
.flatpickr-monthSelect-theme-dark .flatpickr-months .flatpickr-next-month {
  color: #fff;
  fill: #fff;
}

.flatpickr-monthSelect-theme-dark .flatpickr-monthSelect-month {
  color: rgba(255, 255, 255, 0.95);
}

.flatpickr-monthSelect-theme-dark
  .flatpickr-monthSelect-month.flatpickr-disabled {
  color: rgba(255, 255, 255, 0.15);
}

.flatpickr-monthSelect-month.today {
  border-color: #959ea9;
}

.flatpickr-monthSelect-month.inRange,
.flatpickr-monthSelect-month.inRange.today,
.flatpickr-monthSelect-month:hover,
.flatpickr-monthSelect-month:focus {
  background: #e6e6e6;
  cursor: pointer;
  outline: 0;
  border-color: #e6e6e6;
}

.flatpickr-monthSelect-theme-dark .flatpickr-monthSelect-month.inRange,
.flatpickr-monthSelect-theme-dark .flatpickr-monthSelect-month:hover,
.flatpickr-monthSelect-theme-dark .flatpickr-monthSelect-month:focus {
  background: #646c8c;
  border-color: #646c8c;
}

.flatpickr-monthSelect-month.today:hover,
.flatpickr-monthSelect-month.today:focus {
  background: #959ea9;
  border-color: #959ea9;
  color: #fff;
}

.flatpickr-monthSelect-month.selected,
.flatpickr-monthSelect-month.startRange,
.flatpickr-monthSelect-month.endRange {
  background-color: #569ff7;
  box-shadow: none;
  color: #fff;
  border-color: #569ff7;
}

.flatpickr-monthSelect-month .flatpickr-day.startRange {
  border-radius: 50px 0 0 50px !important;
}

.flatpickr-monthSelect-month .flatpickr-day.endRange {
  border-radius: 0 50px 50px 0 !important;
}

.flatpickr-monthSelect-month.inRange {
  border-radius: 0;
  box-shadow: -5px 0 0 #e6e6e6, 5px 0 0 #e6e6e6;
}

.flatpickr-monthSelect-theme-dark .flatpickr-monthSelect-month.selected,
.flatpickr-monthSelect-theme-dark .flatpickr-monthSelect-month.startRange,
.flatpickr-monthSelect-theme-dark .flatpickr-monthSelect-month.endRange {
  background: #80cbc4;
  -webkit-box-shadow: none;
  box-shadow: none;
  color: #fff;
  border-color: #80cbc4;
}