/* ═══ REN DATE RANGE PICKER WEB COMPONENT ═══
   A composable date range picker with dual calendars,
   preset shortcuts, and an input trigger with popover dropdown.
   Built on top of RenCalendar for consistent behavior.

   Usage:
     <ren-date-range-picker
       placeholder="Select date range"
       format="short"
       locale="en-US"
       presets="last7,last30,thisMonth,lastMonth"
     ></ren-date-range-picker>
   ══════════════════════════════════════════════════════════════════ */

/* ═══ BASE WRAPPER ═══ */
.ren-date-range-picker {
  display: inline-flex;
  flex-direction: column;
  width: 100%;
  max-width: 100%;
  position: relative;
}

/* ═══ TRIGGER BUTTON ═══ */
.ren-date-range-trigger {
  anchor-name: --ren-date-range-anchor;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--body-size);
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition-tactile);
  min-height: var(--touch-min);

  &:hover:not([disabled]) {
    border-color: var(--color-border-strong);
  }

  &:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-color: var(--color-accent);
  }

  &[disabled] {
    background: var(--color-fill);
    color: var(--color-text-muted);
    cursor: not-allowed;
    opacity: 0.6;
  }

  /* ═══ CALENDAR ICON ═══ */
  &::after {
    content: '📅';
    font-size: 1.25em;
    flex-shrink: 0;
    pointer-events: none;
  }
}

/* ═══ TRIGGER VALUE DISPLAY ═══ */
.ren-date-range-value {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  overflow: hidden;
  white-space: nowrap;
}

.ren-date-range-start,
.ren-date-range-end {
  overflow: hidden;
  text-overflow: ellipsis;
}

.ren-date-range-separator {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* ═══ EMPTY STATE ═══ */
.ren-date-range-trigger.ren-date-range-empty {
  color: var(--color-text-muted);

  .ren-date-range-value {
    display: none;
  }

  &::before {
    content: attr(data-placeholder);
    color: var(--color-text-muted);
    flex: 1;
  }
}

/* ═══ DROPDOWN CONTAINER (POPOVER) ═══ */
.ren-date-range-dropdown {
  position-anchor: --ren-date-range-anchor;
  position: absolute;
  position-area: bottom span-all;
  position-try-fallbacks: flip-block, flip-inline, flip-block flip-inline;
  inset: auto;
  margin: 0;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 1000;

  /* ═══ POPOVER API ═══ */
  &[popover] {
    padding: 0;
    margin: 0;
    border: none;
    background: transparent;
    box-shadow: none;
  }

  &:popover-open {
    animation: ren-date-range-popup-in var(--duration-enter) var(--ease-enter) both;
  }
}

.ren-date-range-dropdown[data-side="bottom"],
.ren-date-range-dropdown:not([data-side]) {
  position-area: bottom span-all;
  margin-block-start: var(--space-2);
  margin-block-end: 0;
  margin-inline: 0;
}

.ren-date-range-dropdown[data-side="top"] {
  position-area: top span-all;
  margin-block-start: 0;
  margin-block-end: var(--space-2);
  margin-inline: 0;
}

.ren-date-range-dropdown[data-side="right"] {
  position-area: right span-all;
  margin-block: 0;
  margin-inline-start: var(--space-2);
  margin-inline-end: 0;
}

.ren-date-range-dropdown[data-side="left"] {
  position-area: left span-all;
  margin-block: 0;
  margin-inline-start: 0;
  margin-inline-end: var(--space-2);
}

/* ═══ FALLBACK POSITIONING (no complete anchor support) ═══ */
@supports not ((anchor-name: --ren-anchor) and
  (position-anchor: --ren-anchor) and
  (position-area: bottom span-all)) {
  .ren-date-range-dropdown {
    position: fixed;
    top: auto;
    left: auto;
  }
}

/* ═══ ANIMATION: POPUP IN ═══ */
@starting-style {
  .ren-date-range-dropdown:popover-open {
    opacity: 0;
    translate: 0 -8px;
  }
}

@keyframes ren-date-range-popup-in {
  from {
    opacity: 0;
    translate: 0 -8px;
  }

  to {
    opacity: 1;
    translate: 0 0;
  }
}

/* ═══ DROPDOWN INNER WRAPPER ═══ */
.ren-date-range-inner {
  container-type: inline-size;
  container-name: ren-date-range;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

/* ═══ PRESETS SIDEBAR ═══ */
.ren-date-range-presets {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.ren-date-range-preset {
  display: block;
  width: 100%;
  padding: var(--space-1-5) var(--space-3);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--label-size);
  font-weight: var(--label-weight);
  text-align: start;
  cursor: pointer;
  transition: var(--transition-tactile);

  &:hover {
    background: var(--color-fill);
  }

  &:active {
    background: var(--color-fill-active);
  }

  &:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
  }

  &[aria-selected="true"] {
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    font-weight: var(--weight-semibold);
  }
}

/* ═══ DUAL CALENDAR LAYOUT ═══ */
.ren-date-range-calendars {
  display: flex;
  gap: 0;
  padding: var(--space-3);
}

.ren-date-range-calendars > .ren-calendar {
  border: none;
  box-shadow: none;
  background: transparent;
  flex: 1;
}

/* ═══ DIVIDER BETWEEN CALENDARS ═══ */
.ren-date-range-divider {
  width: 1px;
  align-self: stretch;
  background: var(--color-border);
  margin-block: var(--space-2);
  flex-shrink: 0;
}

/* ═══ FOOTER WITH ACTIONS ═══ */
.ren-date-range-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.ren-date-range-summary {
  font-size: var(--label-size);
  color: var(--color-text-secondary);
}

.ren-date-range-summary strong {
  color: var(--color-text);
  font-weight: var(--weight-semibold);
}

.ren-date-range-actions {
  display: flex;
  gap: var(--space-2);
}

.ren-date-range-cancel,
.ren-date-range-apply {
  padding: var(--space-1-5) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--label-size);
  font-weight: var(--label-weight);
  cursor: pointer;
  transition: var(--transition-tactile);

  &:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
  }
}

.ren-date-range-cancel {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);

  &:hover {
    background: var(--color-fill);
    border-color: var(--color-border-strong);
  }
}

.ren-date-range-apply {
  background: var(--color-accent);
  border: 1px solid var(--color-accent);
  color: var(--color-on-accent);

  &:hover {
    background: var(--color-accent-hover);
  }

  &[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
  }
}

/* ═══ DISABLED STATE ═══ */
.ren-date-range-picker[disabled] {
  opacity: 0.6;
  pointer-events: none;
}

/* ═══ ERROR STATE ═══ */
.ren-date-range-picker.ren-date-range-error {
  .ren-date-range-trigger {
    border-color: var(--color-danger);

    &:focus-visible {
      outline-color: var(--color-danger);
    }
  }
}

/* ═══ SUCCESS STATE ═══ */
.ren-date-range-picker.ren-date-range-success {
  .ren-date-range-trigger {
    border-color: var(--color-success);

    &:focus-visible {
      outline-color: var(--color-success);
    }
  }
}

/* ═══ REDUCED MOTION ═══ */
@media (prefers-reduced-motion: reduce) {
  .ren-date-range-dropdown:popover-open {
    animation: none;
    opacity: 1;
    translate: 0 0;
  }

  .ren-date-range-dropdown {
    transition: none;
  }
}

/* ═══ COMPACT LAYOUT (Container Query) ═══
   Stacks calendars vertically and makes presets
   horizontal when the dropdown is narrow —
   works in sidebars, modals, or small viewports. */
@container ren-date-range (max-width: 500px) {
  .ren-date-range-calendars {
    flex-direction: column;
    gap: var(--space-2);
  }

  .ren-date-range-divider {
    width: 100%;
    height: 1px;
    margin-inline: var(--space-2);
    margin-block: 0;
  }

  .ren-date-range-presets {
    flex-direction: row;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
  }

  .ren-date-range-preset {
    white-space: nowrap;
    flex-shrink: 0;
  }
}

/* ═══ MOBILE BOTTOM SHEET (Media Query) ═══
   Fixed positioning requires viewport awareness,
   so this stays as a media query. */
@media (max-width: 680px) {
  .ren-date-range-dropdown {
    position: fixed !important;
    inset: auto 0 0 0 !important;
    max-width: none;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    max-height: 85vh;
    overflow-y: auto;

    &:popover-open {
      animation: ren-date-range-mobile-in var(--duration-enter) var(--ease-enter) both;
    }
  }

  @starting-style {
    .ren-date-range-dropdown:popover-open {
      translate: 0 100%;
      opacity: 0;
    }
  }

}

@keyframes ren-date-range-mobile-in {
  from {
    translate: 0 100%;
    opacity: 0;
  }

  to {
    translate: 0 0;
    opacity: 1;
  }
}

/* ═══ FORM INTEGRATION ═══ */
.ren-date-range-picker {
  input[type='hidden'] {
    display: none;
  }
}