/* The dual-calendar date field (spec section 13). Mobile: a full-width sheet at the
   bottom; from 744px: a dropdown under the field with the single raised shadow. */

.date-field {
  position: relative;
}

.date-field__native {
  font-variant-numeric: tabular-nums;
}

.date-field__closed {
  display: flex;
  align-items: center;
  text-align: start;
  cursor: pointer;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

.date-field__closed--empty {
  color: var(--color-ink-muted);
}

.date-field__closed-text {
  min-inline-size: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Mobile: a sheet at the bottom of the screen. */
.calendar {
  inline-size: 100%;
  max-inline-size: 100%;
  max-block-size: 92vh;
  margin: auto 0 0;
  padding: var(--space-2) var(--space-4) calc(var(--space-4) + env(safe-area-inset-bottom, 0px));
  overflow-y: auto;
  border: 0;
  border-start-start-radius: var(--radius-card);
  border-start-end-radius: var(--radius-card);
  background: var(--color-surface-raised);
  color: var(--color-ink);
  box-shadow: var(--shadow-raised);
}

.calendar::backdrop {
  background: var(--color-ink);
  opacity: 0.4;
}

.calendar__toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.calendar__toggle {
  display: inline-flex;
  padding: var(--space-1);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-full);
}

.calendar__toggle-option {
  min-inline-size: 48px;
  min-block-size: 48px;
  padding-inline: var(--space-3);
  border: 0;
  border-radius: var(--radius-full);
  background: none;
  color: var(--color-ink-muted);
  font-family: var(--font-family-display);
  font-weight: var(--font-weight-semibold);
}

.calendar__toggle-option[aria-pressed="true"] {
  background: var(--color-ink);
  color: var(--color-surface-raised);
}

.calendar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-block: var(--space-2);
}

.calendar__title {
  flex: 1;
  min-inline-size: 0;
  text-align: center;
}

.calendar__title-row {
  display: flex;
  justify-content: center;
  gap: var(--space-1);
}

.calendar__title-button {
  min-inline-size: 48px;
  min-block-size: 48px;
  padding-inline: var(--space-2);
  border: 0;
  border-radius: var(--radius-control);
  background: none;
  color: var(--color-ink);
  font-family: var(--font-family-display);
  font-size: var(--font-size-title);
  line-height: var(--line-height-title);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
  cursor: pointer;
}

.calendar__title-button:hover,
.calendar__title-button[aria-expanded="true"] {
  background: var(--color-surface-sunken);
}

@media (max-width: 743px) {
  .calendar__title-button {
    font-size: var(--font-size-body-lg);
    line-height: var(--line-height-body-lg);
  }
}

.calendar__subtitle {
  color: var(--color-ink-muted);
  font-size: var(--font-size-caption);
  line-height: var(--line-height-caption);
}

/* The arrow icon points back (mirrored in RTL by base.css); "next" points forward. */
[dir="rtl"] .calendar__next .icon {
  transform: none;
}

[dir="ltr"] .calendar__next .icon {
  transform: scaleX(-1);
}

.calendar__previous:disabled,
.calendar__next:disabled {
  opacity: 0.35;
  cursor: default;
}

.calendar__grid {
  inline-size: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.calendar__weekday {
  padding-block: var(--space-2);
  color: var(--color-ink-muted);
  font-size: var(--font-size-caption);
  line-height: var(--line-height-caption);
  font-weight: var(--font-weight-medium);
}

.calendar__cell {
  padding: 1px;
  text-align: center;
}

.calendar__day {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  inline-size: 100%;
  max-inline-size: 52px;
  min-block-size: 48px;
  aspect-ratio: 1;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  background: none;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}

.calendar__day:hover:not(:disabled) {
  border-color: var(--color-ink);
}

.calendar__day-primary {
  font-family: var(--font-family-display);
  font-size: var(--font-size-body-lg);
  line-height: 1.1;
  font-weight: var(--font-weight-medium);
}

.calendar__day-secondary {
  color: var(--color-ink-muted);
  font-size: 11px;
  line-height: 1.1;
}

.calendar__day--today {
  border-color: var(--color-ink);
}

.calendar__day--selected,
.calendar__day--selected:hover:not(:disabled) {
  border-color: var(--color-ink);
  background: var(--color-ink);
  color: var(--color-surface-raised);
}

.calendar__day--selected .calendar__day-secondary {
  color: inherit;
  opacity: 0.75;
}

.calendar__day:disabled {
  color: var(--color-ink-muted);
  opacity: 0.4;
  cursor: default;
}

.calendar__choices {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  max-block-size: 336px;
  overflow-y: auto;
  padding-block: var(--space-2);
}

.calendar__choices--years {
  grid-template-columns: repeat(4, 1fr);
}

.calendar__choices[hidden] {
  display: none;
}

.calendar__choice {
  min-block-size: 48px;
  padding-inline: var(--space-2);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-control);
  background: none;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}

.calendar__choice:hover:not(:disabled) {
  border-color: var(--color-ink);
}

.calendar__choice--current {
  border-color: var(--color-ink);
  background: var(--color-ink);
  color: var(--color-surface-raised);
}

.calendar__choice:disabled {
  opacity: 0.4;
  cursor: default;
}

.calendar__footer {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  margin-block-start: var(--space-2);
  padding-block-start: var(--space-2);
  border-block-start: 1px solid var(--color-line);
}

/* From 744px: a dropdown under the field. */
@media (min-width: 744px) {
  .calendar {
    position: absolute;
    inset-block-start: 100%;
    inset-inline-start: 0;
    z-index: 30;
    inline-size: 360px;
    max-block-size: none;
    margin: 0;
    margin-block-start: var(--space-2);
    padding: var(--space-3) var(--space-4) var(--space-4);
    border-radius: var(--radius-card);
  }

  .calendar__day {
    max-inline-size: 44px;
    min-block-size: 44px;
  }
}