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

.rdp-root {
  font-size: 12px;

  --rdp-cell-size: 40px;
  /* Size of the day cells. */
  --rdp-caption-font-size: 1rem;
  /* 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), 0.5);
  /* 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;
}

.rdp-root {
  position: relative; /* Required to position the nav. */
  box-sizing: border-box;
}

/* ---------- */
/* Day Buttons */
/* ----------- */

.rdp-day_button {
  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: 50%;
}

.rdp-day.rdp-outside:not(.rdp-selected) .rdp-day_button {
  opacity: 0.5;
}

.rdp-day.rdp-disabled:not(.rdp-selected) .rdp-day_button {
  opacity: 0.25;
}

.rdp-day:not(.rdp-disabled) .rdp-day_button {
  cursor: pointer;
}

.rdp-day:not(.rdp-selected, .rdp-disabled) .rdp-day_button:focus-visible {
  color: inherit;
  background-color: var(--rdp-background-color);
}

.rdp-selected:not(.rdp-range_middle, .rdp-disabled) .rdp-day_button:focus-visible {
  outline: var(--rdp-outline);
  outline-offset: 2px;
  background-color: var(--rdp-dark-background-color);
  outline-width: thin;
}

.rdp-day:not(.rdp-disabled) .rdp-day_button:hover {
  background-color: var(--rdp-background-color);
}

.rdp-selected .rdp-day_button {
  background-color: var(--rdp-accent-color);
  border-radius: 50%;
  color: var(--rdp-selected-color);
  z-index: 1;
}

.rdp-selected .rdp-day_button:hover:not(.rdp-disabled) {
  background-color: var(--rdp-dark-background-color);
}

.rdp-week {
  margin: 0;
  padding: 0;
}

.rdp-today:not(.rdp-outside) {
  position: relative;
}

.rdp-today:not(.rdp-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-selected .rdp-day_button:focus-visible,
.rdp-selected .rdp-day_button:hover {
  color: var(--rdp-selected-color);
  opacity: 1;
  background-color: var(--rdp-accent-color);
}

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

/* ---------- */
/* Top Nav  */
/* ---------- */

.rdp-nav {
  box-sizing: border-box;
  position: absolute;
  padding: inherit;

  top: 1.2em;
  right: 1em;

  display: flex;
  align-items: center;
}

.rdp-button_next,
.rdp-button_previous {
  border: none;
  background: none;
  padding: 0;
  margin: 0;
  cursor: pointer;
  font: inherit;
  -moz-appearance: none;
  -webkit-appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  appearance: none;
  width: var(--rdp-caption-navigation-size);
  height: var(--rdp-caption-navigation-size);
  padding: 0.25em;
  border-radius: 2px;
}

.rdp-chevron {
  fill: rgba(var(--color-text-200));
  height: 0.75rem;
  width: 0.75rem;
}

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

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

.rdp-dropdowns {
  position: relative;
  /* width: 100%; */
  display: inline-flex;
  align-items: center;
}

.rdp-dropdown {
  appearance: none;
  --webkit-appearance: none;
  --moz-appearance: none;
  position: absolute;
  z-index: 2;
  top: 0;
  bottom: 0;
  left: 0;
  width: 100%;
  margin: 0;
  padding: 0;
  opacity: 0;
  border: none;
  font-family: inherit;
  font-size: 1rem;
  line-height: inherit;
  cursor: pointer;
  background: transparent;

  &:hover {
    background-color: rgba(var(--color-background-80)) !important;
  }
}

.rdp-dropdown_root {
  margin: 0;
  position: relative;
  display: inline-flex;
  align-items: center;
}

.rdp-months_dropdown {
  text-transform: capitalize;
}

.rdp-dropdown[data-disabled="true"] {
  opacity: unset;
  color: unset;
}

.rdp-caption_label {
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  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;
  background: transparent;
  border-radius: 4px;
}

.rdp-dropdown:not([data-disabled="true"]) {
  &:focus-visible + .rdp-caption_label {
    border: var(--rdp-outline);
    border-radius: 6px;
  }

  &:hover {
    & + .rdp-caption_label {
      background-color: rgba(var(--color-background-80)) !important;
    }
  }
}

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

/* --------------- */
/* Range selection */
/* --------------- */

.rdp-range_start,
.rdp-range_middle,
.rdp-range_end {
  position: relative;
}

.rdp-range_start::before,
.rdp-range_middle::before,
.rdp-range_end::before {
  content: "";
  position: absolute;
  background-color: var(--rdp-background-color);
  top: 50%;
  height: 100%;
  width: 50%;
  transform: translate(0, -50%);
  z-index: -1;
}

.rdp-range_start::before {
  left: 50%;
}

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

.rdp-range_end::before {
  right: 50%;
}

.rdp-range_start.rdp-range_end::before {
  display: none;
}

.rdp-range_middle .rdp-day_button {
  background-color: transparent;
  color: inherit;
}

.rdp-day.rdp-range_middle .rdp-day_button:hover,
.rdp-day.rdp-range_middle .rdp-day_button:focus-visible {
  background-color: var(--rdp-background-color);
  color: inherit;
}