plane/web/styles/react-day-picker.css

.rdp {
  font-size: 12px;

  --rdp-cell-size: 40px;
  /* Size of the day cells. */
  --rdp-caption-font-size: 1.15rem;
  /* Font size for the caption labels. */
  --rdp-caption-navigation-size: 1.25rem;
  /* Font size for the caption labels. */
  --rdp-accent-color: rgba(var(--color-primary-100));
  /* Accent color for the background of selected days. */
  --rdp-background-color: rgba(var(--color-primary-100), 0.2);
  /* Background color for the hovered/focused elements. */
  --rdp-dark-background-color: rgba(var(--color-primary-300));
  /* Background color for the hovered/focused, already selected elements. */
  --rdp-outline: 2px solid var(--rdp-accent-color);
  /* Outline border for focused elements */
  --rdp-selected-color: #ffffff;
  /* Color of selected day text */

  background: transparent;
}

/* Hide elements for devices that are not screen readers */
.rdp-vhidden {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
  background: transparent;
  border: 0;
  -moz-appearance: none;
  -webkit-appearance: none;
  appearance: none;
  position: absolute !important;
  top: 0;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  overflow: hidden !important;
  clip: rect(1px, 1px, 1px, 1px) !important;
  border: 0 !important;
}

/* Buttons */
.rdp-button_reset {
  appearance: none;
  position: relative;
  margin: 0;
  padding: 0;
  cursor: default;
  color: inherit;
  background: none;
  font: inherit;

  -moz-appearance: none;
  -webkit-appearance: none;
}

.rdp-button_reset:focus-visible {
  /* Make sure to reset outline only when :focus-visible is supported */
  outline: none;
}

.rdp-button {
  border: 2px solid transparent;
}

.rdp-button[disabled]:not(.rdp-day_selected) {
  opacity: 0.25;
}

.rdp-button:not([disabled]) {
  cursor: pointer;
}

.rdp-button:focus-visible:not([disabled]):not(.rdp-day_selected) {
  color: inherit;
  background-color: var(--rdp-background-color);
}

.rdp-button:focus-visible:not([disabled]).rdp-day_selected:not(.rdp-day_range_middle) {
  outline: var(--rdp-outline);
  outline-offset: 2px;
  background-color: var(--rdp-dark-background-color);
  outline-width: thin;
}

.rdp-button:hover:not([disabled]).rdp-day_selected {
  background-color: var(--rdp-dark-background-color);
}

.rdp-button:hover:not([disabled]):not(.rdp-day_selected) {
  background-color: var(--rdp-background-color);
}

.rdp-months {
  display: flex;
}

.rdp-month {
  margin: 0 1em;
}

.rdp-month:first-child {
  margin-left: 0;
}

.rdp-month:last-child {
  margin-right: 0;
}

.rdp-table {
  margin: 0;
  max-width: calc(var(--rdp-cell-size) * 7);
  border-collapse: collapse;
}

.rdp-with_weeknumber .rdp-table {
  max-width: calc(var(--rdp-cell-size) * 8);
  border-collapse: collapse;
}

.rdp-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0;
  text-align: left;
}

.rdp-multiple_months .rdp-caption {
  position: relative;
  display: block;
  text-align: center;
}

.rdp-caption_dropdowns {
  position: relative;
  display: inline-flex;
}

.rdp-caption_label {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  margin: 0;
  padding: 0 0.25em;
  white-space: nowrap;
  color: currentColor;
  border: 0;
  border: 2px solid transparent;
  font-family: inherit;
  font-size: var(--rdp-caption-font-size);
  font-weight: 600;
}

.rdp-nav {
  white-space: nowrap;
}

.rdp-multiple_months .rdp-caption_start .rdp-nav {
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.rdp-multiple_months .rdp-caption_end .rdp-nav {
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
}

.rdp-nav_button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--rdp-caption-navigation-size);
  height: var(--rdp-caption-navigation-size);
  padding: 0.25em;
  border-radius: 2px;
}

.rdp-nav_button:hover,
.rdp-nav_button:focus-visible {
  background-color: rgba(var(--color-background-80)) !important;
}

/* ---------- */
/* Dropdowns  */
/* ---------- */

.rdp-dropdown_year,
.rdp-dropdown_month {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.rdp-dropdown {
  appearance: none;
  position: absolute;
  z-index: 2;
  top: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  margin: 0;
  padding: 0;
  cursor: inherit;
  opacity: 0;
  border: none;
  background-color: transparent;
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

.rdp-dropdown[disabled] {
  opacity: unset;
  color: unset;
}

.rdp-dropdown:focus-visible:not([disabled])+.rdp-caption_label {
  background-color: var(--rdp-background-color);
  border: var(--rdp-outline);
  border-radius: 6px;
}

.rdp-dropdown_icon {
  margin: 0 0 0 5px;
}

.rdp-head {
  border: 0;
}

.rdp-head_row,
.rdp-row {
  height: 100%;
}

.rdp-head_cell {
  vertical-align: middle;
  font-size: 0.75em;
  font-weight: 700;
  text-align: center;
  height: 100%;
  height: var(--rdp-cell-size);
  padding: 0;
  text-transform: uppercase;
}

.rdp-tbody {
  border: 0;
}

.rdp-tfoot {
  margin: 0.5em;
}

.rdp-cell {
  width: var(--rdp-cell-size);
  height: 100%;
  height: var(--rdp-cell-size);
  padding: 0;
  text-align: center;
}

.rdp-weeknumber {
  font-size: 0.75em;
}

.rdp-weeknumber,
.rdp-day {
  display: flex;
  overflow: hidden;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  width: var(--rdp-cell-size);
  max-width: var(--rdp-cell-size);
  height: var(--rdp-cell-size);
  margin: 0;
  border: 2px solid transparent;
  border-radius: 100%;
}

.rdp-day_today:not(.rdp-day_outside) {
  position: relative;
}

.rdp-day_today:not(.rdp-day_outside)::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0.5em;
  height: 0.5em;
  background-color: var(--rdp-background-color);
  border-radius: 100%;
  transform: translate(-50%, 0);
}

.rdp-day_selected,
.rdp-day_selected:focus-visible,
.rdp-day_selected:hover {
  color: var(--rdp-selected-color);
  opacity: 1;
  background-color: var(--rdp-accent-color);
}

.rdp-day_outside:not(.rdp-day_selected) {
  opacity: 0.5;
}

.rdp-day_selected:focus-visible {
  z-index: 1;
}

td:has(.rdp-day_range_start),
td:has(.rdp-day_range_middle),
td:has(.rdp-day_range_end) {
  position: relative;
}

td:has(.rdp-day_range_start)::before,
td:has(.rdp-day_range_middle)::before,
td:has(.rdp-day_range_end)::before {
  content: '';
  position: absolute;
  background-color: var(--rdp-background-color);
  top: 50%;
  height: 100%;
  width: 50%;
  transform: translate(0, -50%);
}

td:has(.rdp-day_range_start)::before {
  left: 50%;
}

td:has(.rdp-day_range_middle)::before {
  left: 50%;
  width: 100%;
  transform: translate(-50%, -50%);
}

td:has(.rdp-day_range_end)::before {
  right: 50%;
}

td:has(.rdp-day_range_start.rdp-day_range_end)::before {
  display: none;
}

.rdp-day_range_middle {
  background-color: transparent;
  color: inherit;
}

.rdp-day_range_middle:hover,
.rdp-day_range_middle:focus-visible {
  background-color: var(--rdp-background-color) !important;
  color: inherit !important;
}