/*
 * Sapphire V2 (beta): Calendar page.
 * Loaded after the core css/v2 files; every rule is scoped to :root[data-ui="v2"] and uses its tokens.
 *
 * Layout: header row (month + summary | filter, Today, prev/next, Add), then a month grid
 * with a selected-day agenda panel beside it (below it on narrower screens). On phones the
 * grid shows coloured dots per day instead of chips. Markup comes from renderCalendarV2().
 */

/* ── Page frame: no outer card, the grid and agenda are the surfaces ── */

:root[data-ui="v2"] .calendar-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    "header"
    "weekdays"
    "grid"
    "agenda";
  grid-template-rows: auto;
  gap: 0;
  padding: 0;
  border: none;
  background: none;
  align-items: start;
}

/* ── Header ── */

:root[data-ui="v2"] .calendar-header {
  grid-area: header;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

:root[data-ui="v2"] .calendar-header > div:not(.calendar-header-actions):not(.calendar-v2-heading) {
  display: none;
}

:root[data-ui="v2"] .calendar-v2-heading {
  min-width: 0;
}

:root[data-ui="v2"] .calendar-v2-title {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

:root[data-ui="v2"] .calendar-v2-summary {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--text-secondary);
}

:root[data-ui="v2"] .calendar-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
}

:root[data-ui="v2"] .calendar-type-filter {
  border-radius: var(--radius);
}

:root[data-ui="v2"] .calendar-v2-today {
  height: 36px;
  padding: 0 12px;
  font-size: 13px;
  border-radius: var(--radius);
}

/* Prev / next as one joined button pair; the month label lives in the heading instead. */
:root[data-ui="v2"] .calendar-controls {
  display: inline-flex;
  gap: 0;
  padding: 0;
  height: 36px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  background: var(--bg-secondary);
  overflow: hidden;
}

:root[data-ui="v2"] .calendar-month {
  display: none;
}

:root[data-ui="v2"] .calendar-nav {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: none;
  border-radius: 0;
  background: none;
  color: var(--text-secondary);
  font-size: 16px;
}

:root[data-ui="v2"] .calendar-nav + .calendar-nav,
:root[data-ui="v2"] .calendar-month + .calendar-nav {
  border-left: 1px solid var(--card-border);
}

:root[data-ui="v2"] .calendar-nav:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

:root[data-ui="v2"] .calendar-nav:active {
  background: var(--bg-depth);
}

/* The joined pair clips its overflow, so draw the ring inside each half. */
:root[data-ui="v2"] .calendar-nav:focus-visible {
  outline-offset: -2px;
}

:root[data-ui="v2"] .calendar-nav:first-child {
  border-radius: calc(var(--radius) - 1px) 0 0 calc(var(--radius) - 1px);
}

:root[data-ui="v2"] .calendar-nav:last-child {
  border-radius: 0 calc(var(--radius) - 1px) calc(var(--radius) - 1px) 0;
}

:root[data-ui="v2"] .calendar-v2-add {
  height: 36px;
  padding: 0 12px;
}

/* ── Month grid ── */

:root[data-ui="v2"] .calendar-weekdays {
  grid-area: weekdays;
  gap: 0;
  padding: 0;
  border: 1px solid var(--card-border);
  border-bottom: none;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-tertiary);
}

:root[data-ui="v2"] .calendar-weekdays span {
  padding: 8px 10px;
  text-align: left;
}

:root[data-ui="v2"] .calendar-grid {
  grid-area: grid;
  gap: 1px;
  grid-auto-rows: 118px;
  background: var(--card-border);
  border: 1px solid var(--card-border);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  overflow: hidden;
}

:root[data-ui="v2"] .calendar-cell {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 3px;
  height: auto;
  min-height: 0;
  padding: 6px;
  overflow: hidden;
  border: none;
  border-radius: 0;
  background: var(--card-surface);
  box-shadow: none;
  opacity: 1;
  cursor: pointer;
  transition: background 0.12s ease;
}

:root[data-ui="v2"] .calendar-cell:hover {
  background: color-mix(in srgb, var(--bg-hover) 55%, var(--card-surface));
}

:root[data-ui="v2"] .calendar-cell.is-today {
  border: none;
  box-shadow: none;
}

/* The selected day is marked by its number (below), with only a faint cell tint. */
:root[data-ui="v2"] .calendar-cell.is-selected {
  background: color-mix(in srgb, var(--accent) 5%, var(--card-surface));
  box-shadow: none;
}

/* Day number */
:root[data-ui="v2"] .calendar-v2-day {
  flex: none;
  display: inline-grid;
  place-items: center;
  align-self: flex-start;
  min-width: 24px;
  height: 24px;
  padding: 0 6px;
  border: none;
  border-radius: 999px;
  background: none;
  color: var(--text-primary);
  font: inherit;
  font-size: 12px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}

:root[data-ui="v2"] .calendar-cell.is-weekend .calendar-v2-day {
  color: var(--text-secondary);
}

:root[data-ui="v2"] .calendar-cell.is-muted .calendar-v2-day {
  color: var(--text-tertiary);
}

/* As Apple Calendar: today's number is in the accent; the selected day gets a filled
   circle, accent when it's today and neutral otherwise. */
:root[data-ui="v2"] .calendar-cell.is-today .calendar-v2-day {
  color: var(--accent);
  font-weight: 600;
}

:root[data-ui="v2"] .calendar-cell.is-selected .calendar-v2-day {
  background: var(--text-primary);
  color: var(--bg-primary);
  font-weight: 600;
}

:root[data-ui="v2"] .calendar-cell.is-today.is-selected .calendar-v2-day {
  background: var(--accent);
  color: var(--text-on-accent);
}

:root[data-ui="v2"] .calendar-v2-day:focus-visible {
  outline-offset: 0;
}

/* Event chips */
:root[data-ui="v2"] .calendar-v2-events {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

:root[data-ui="v2"] .calendar-cell.is-muted .calendar-v2-events {
  opacity: 0.55;
}

:root[data-ui="v2"] .calendar-v2-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  min-width: 0;
  height: 22px;
  margin: 0;
  padding: 0 6px;
  border: none;
  border-radius: 5px;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  text-align: left;
  opacity: 1;
  cursor: pointer;
}

:root[data-ui="v2"] .calendar-v2-chip.is-assessment,
:root[data-ui="v2"] .calendar-v2-chip.is-homework {
  border-left: none;
}

:root[data-ui="v2"] .calendar-v2-chip.is-assessment {
  background: color-mix(in srgb, var(--event-color) 15%, transparent);
  color: var(--text-primary);
}

:root[data-ui="v2"] .calendar-v2-chip.is-homework {
  background: transparent;
}

:root[data-ui="v2"] .calendar-v2-chip:hover,
:root[data-ui="v2"] button.calendar-v2-chip:hover {
  border-color: transparent;
  background: color-mix(in srgb, var(--event-color) 22%, transparent);
  color: var(--text-primary);
}

:root[data-ui="v2"] .calendar-v2-chip.is-completed {
  background: transparent;
  color: var(--text-tertiary);
}

:root[data-ui="v2"] .calendar-v2-chip.is-completed:hover {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

:root[data-ui="v2"] .calendar-v2-chip.is-overdue .calendar-v2-chip-name {
  color: var(--danger);
}

:root[data-ui="v2"] .calendar-v2-chip-name {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  line-height: 22px;
}

:root[data-ui="v2"] .calendar-v2-chip-icon {
  flex: none;
  font-size: 12px;
  color: var(--event-color);
}

/* The subject's icon replaces the dot; homework is shown fainter than an assessment. */
:root[data-ui="v2"] .calendar-v2-subject-icon {
  flex: none;
  font-size: 13px;
  line-height: 1;
  color: var(--event-color);
}

:root[data-ui="v2"] .calendar-v2-chip.is-homework .calendar-v2-subject-icon,
:root[data-ui="v2"] .calendar-v2-subject-icon.is-homework {
  opacity: 0.6;
}

/* Dots: solid for assessments, hollow ring for homework (chips, phone grid, agenda). */
:root[data-ui="v2"] .calendar-v2-chip-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--event-color);
}

:root[data-ui="v2"] .calendar-v2-chip.is-homework .calendar-v2-chip-dot,
:root[data-ui="v2"] .calendar-v2-chip-dot.is-homework {
  background: transparent;
  box-shadow: inset 0 0 0 1.5px var(--event-color);
}

:root[data-ui="v2"] .calendar-v2-chip-dot.is-completed {
  opacity: 0.45;
}

:root[data-ui="v2"] .calendar-v2-more {
  align-self: flex-start;
  height: 20px;
  margin: 0;
  padding: 0 6px;
  border: none;
  border-radius: 5px;
  background: none;
  color: var(--text-secondary);
  font: inherit;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
}

:root[data-ui="v2"] .calendar-v2-more:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

:root[data-ui="v2"] .calendar-v2-dots {
  display: none;
}

/* ── Busy weeks: two or more assessments due Mon–Sun ──
   A narrow first column runs down the grid, like week numbers. It stays empty for an
   ordinary week; a busy one shows its assessment count in a small amber chip (red from 3). */

:root[data-ui="v2"] .calendar-weekdays,
:root[data-ui="v2"] .calendar-grid {
  grid-template-columns: 30px repeat(7, minmax(0, 1fr));
}

:root[data-ui="v2"] .calendar-weekdays .calendar-v2-week-head {
  display: grid;
  place-items: center;
  padding: 0;
  font-size: 13px;
  color: var(--text-tertiary);
}

:root[data-ui="v2"] .calendar-v2-week {
  display: flex;
  justify-content: center;
  padding-top: 9px;
  background: var(--card-surface);
}

:root[data-ui="v2"] .calendar-v2-week-count {
  display: inline-grid;
  place-items: center;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, var(--grade-c) 75%, var(--text-primary));
  background: color-mix(in srgb, var(--grade-c) 16%, transparent);
  cursor: default;
}

:root[data-ui="v2"] .calendar-v2-week-count.is-heavy {
  color: color-mix(in srgb, var(--grade-d) 75%, var(--text-primary));
  background: color-mix(in srgb, var(--grade-d) 16%, transparent);
}

/* Coming up: a quiet heading above the first item of a busy week. */
:root[data-ui="v2"] .calendar-v2-next-busy {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 6px 8px 2px;
  font-size: 12px;
  font-weight: 500;
  color: color-mix(in srgb, var(--grade-c) 75%, var(--text-primary));
}

:root[data-ui="v2"] .calendar-v2-next-busy .calendar-v2-busy-icon {
  flex: none;
  font-size: 12px;
  line-height: 1;
}

:root[data-ui="v2"] .calendar-v2-next-busy:first-child {
  margin-top: 0;
}

:root[data-ui="v2"] .calendar-v2-next-busy span {
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

/* ── Agenda panel (selected day) ── */

:root[data-ui="v2"] .calendar-agenda {
  grid-area: agenda;
  display: flex;
  flex-direction: column;
  min-width: 0;
  margin-top: 16px;
  padding: 16px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  background: var(--card-surface);
}

:root[data-ui="v2"] .calendar-v2-agenda-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

:root[data-ui="v2"] .calendar-v2-agenda-kicker {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-tertiary);
}

:root[data-ui="v2"] .calendar-v2-agenda-kicker.is-today {
  color: var(--accent);
}

:root[data-ui="v2"] .calendar-v2-agenda-title {
  margin: 2px 0 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

:root[data-ui="v2"] .calendar-agenda .icon-button {
  flex: none;
  border-color: var(--card-border);
  background: var(--bg-secondary);
}

:root[data-ui="v2"] .calendar-agenda .icon-button:hover {
  background: var(--bg-hover);
  border-color: var(--card-border);
}

:root[data-ui="v2"] .calendar-v2-agenda-list,
:root[data-ui="v2"] .calendar-v2-next-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

:root[data-ui="v2"] .calendar-v2-agenda-item {
  padding: 10px 12px;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  transition: background 0.12s ease;
}

:root[data-ui="v2"] .calendar-v2-agenda-item:has(.calendar-v2-agenda-main:hover) {
  background: var(--bg-hover);
}

:root[data-ui="v2"] .calendar-v2-agenda-main {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  margin: 0;
  padding: 0;
  border: none;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

:root[data-ui="v2"] .calendar-v2-agenda-mark {
  flex: none;
  margin-top: 2px;
  font-size: 15px;
  line-height: 1;
  color: var(--event-color);
}

:root[data-ui="v2"] .calendar-v2-agenda-item.is-homework .calendar-v2-agenda-mark {
  opacity: 0.6;
}

:root[data-ui="v2"] .calendar-v2-agenda-item.is-completed .calendar-v2-agenda-mark {
  opacity: 0.45;
}

:root[data-ui="v2"] .calendar-v2-agenda-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

:root[data-ui="v2"] .calendar-v2-agenda-name {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

:root[data-ui="v2"] .calendar-v2-agenda-item.is-completed .calendar-v2-agenda-name {
  color: var(--text-secondary);
}

:root[data-ui="v2"] .calendar-v2-agenda-meta {
  font-size: 12px;
  color: var(--text-secondary);
}

:root[data-ui="v2"] .calendar-v2-agenda-subject {
  color: var(--text-primary);
}

:root[data-ui="v2"] .calendar-v2-agenda-notes {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 12px;
  color: var(--text-tertiary);
}

:root[data-ui="v2"] .calendar-v2-agenda-actions {
  display: flex;
  gap: 6px;
  margin-top: 10px;
  /* Line the buttons up with the item's text: 15px mark + 10px gap. */
  padding-left: 25px;
}

:root[data-ui="v2"] .calendar-v2-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  height: 18px;
  padding: 0 6px;
  border: 1px solid var(--card-border);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  line-height: 1;
}

:root[data-ui="v2"] .calendar-v2-badge.is-done {
  color: var(--grade-a);
  border-color: color-mix(in srgb, var(--grade-a) 35%, var(--card-border));
}

:root[data-ui="v2"] .calendar-v2-badge.is-overdue {
  color: var(--danger);
  border-color: var(--danger-border);
  background: var(--danger-soft);
}

:root[data-ui="v2"] .calendar-v2-agenda-empty {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding: 2px 0;
  font-size: 13px;
  color: var(--text-tertiary);
}

/* Coming up */
:root[data-ui="v2"] .calendar-v2-next {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--card-border);
}

:root[data-ui="v2"] .calendar-v2-next-title {
  margin-bottom: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-tertiary);
}

:root[data-ui="v2"] .calendar-v2-next-list {
  gap: 0;
  margin: 0 -8px;
}

:root[data-ui="v2"] .calendar-v2-next-item {
  display: grid;
  grid-template-columns: 30px 18px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  width: 100%;
  margin: 0;
  padding: 6px 8px;
  border: none;
  border-radius: 6px;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

:root[data-ui="v2"] .calendar-v2-next-item:hover {
  background: var(--bg-hover);
}

:root[data-ui="v2"] .calendar-v2-next-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.1;
  font-size: 11px;
  color: var(--text-tertiary);
}

:root[data-ui="v2"] .calendar-v2-next-date strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

:root[data-ui="v2"] .calendar-v2-next-icon {
  justify-self: center;
  font-size: 15px;
}

:root[data-ui="v2"] .calendar-v2-next-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

:root[data-ui="v2"] .calendar-v2-next-name,
:root[data-ui="v2"] .calendar-v2-next-meta {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

:root[data-ui="v2"] .calendar-v2-next-name {
  font-size: 13px;
  font-weight: 500;
}

:root[data-ui="v2"] .calendar-v2-next-meta {
  font-size: 12px;
  color: var(--text-secondary);
}

/* ── Narrower screens: agenda moves below the grid ── */

@media (max-width: 1000px) {
  :root[data-ui="v2"] .calendar-card {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "header"
      "weekdays"
      "grid"
      "agenda";
    grid-template-rows: auto;
  }

  :root[data-ui="v2"] .calendar-agenda {
    margin-top: 16px;
  }

  :root[data-ui="v2"] .calendar-grid {
    grid-auto-rows: 104px;
  }
}

/* ── Phones: dots per day instead of chips ── */

@media (max-width: 700px) {
  :root[data-ui="v2"] .calendar-header {
    gap: 10px 8px;
  }

  /* Flatten the action group so Today / arrows / Add share the heading's row
     and the filter takes a full row underneath. */
  :root[data-ui="v2"] .calendar-header-actions {
    display: contents;
  }

  :root[data-ui="v2"] .calendar-v2-heading {
    flex: 1 1 0;
  }

  :root[data-ui="v2"] .calendar-v2-title {
    font-size: 18px;
  }

  :root[data-ui="v2"] .calendar-v2-summary {
    font-size: 12px;
  }

  :root[data-ui="v2"] .calendar-type-filter {
    order: 10;
    flex: 1 1 100%;
  }

  :root[data-ui="v2"] .calendar-type-filter-button {
    flex: 1 1 0;
    padding: 0 6px;
  }

  :root[data-ui="v2"] .calendar-v2-add {
    width: 36px;
    padding: 0;
    justify-content: center;
  }

  :root[data-ui="v2"] .calendar-v2-add-label {
    display: none;
  }

  :root[data-ui="v2"] .calendar-weekdays span {
    padding: 6px 0;
    text-align: center;
    font-size: 11px;
  }

  :root[data-ui="v2"] .calendar-grid {
    grid-auto-rows: 54px;
  }

  :root[data-ui="v2"] .calendar-weekdays,
  :root[data-ui="v2"] .calendar-grid {
    grid-template-columns: 22px repeat(7, minmax(0, 1fr));
  }

  :root[data-ui="v2"] .calendar-v2-week {
    align-items: center;
    padding-top: 0;
  }

  :root[data-ui="v2"] .calendar-v2-week-count {
    min-width: 16px;
    height: 16px;
    padding: 0 3px;
    font-size: 10px;
  }

  :root[data-ui="v2"] .calendar-cell {
    align-items: center;
    gap: 4px;
    padding: 5px 2px;
  }

  :root[data-ui="v2"] .calendar-v2-day {
    align-self: center;
    min-width: 28px;
    height: 28px;
    font-size: 13px;
  }

  :root[data-ui="v2"] .calendar-cell.is-selected {
    background: var(--card-surface);
    box-shadow: none;
  }

  :root[data-ui="v2"] .calendar-v2-events {
    display: none;
  }

  :root[data-ui="v2"] .calendar-v2-dots {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
    height: 8px;
  }

  :root[data-ui="v2"] .calendar-cell.is-muted .calendar-v2-dots {
    opacity: 0.5;
  }

  :root[data-ui="v2"] .calendar-v2-dots .calendar-v2-chip-dot {
    width: 6px;
    height: 6px;
  }

  :root[data-ui="v2"] .calendar-v2-dots-more {
    font-size: 11px;
    font-weight: 600;
    line-height: 1;
    color: var(--text-tertiary);
  }

  :root[data-ui="v2"] .calendar-agenda {
    padding: 14px;
  }

}

/* On wide screens the panel under the grid splits in two: the selected day on the
   left, Coming up on the right. */
@media (min-width: 1001px) {
  :root[data-ui="v2"] .calendar-agenda {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    grid-template-areas:
      "head next"
      "body next";
    grid-template-rows: auto 1fr;
    column-gap: 32px;
    align-items: start;
  }

  :root[data-ui="v2"] .calendar-v2-agenda-head {
    grid-area: head;
  }

  :root[data-ui="v2"] .calendar-v2-agenda-list,
  :root[data-ui="v2"] .calendar-v2-agenda-empty {
    grid-area: body;
  }

  :root[data-ui="v2"] .calendar-v2-next {
    grid-area: next;
    margin-top: 0;
    padding-top: 0;
    padding-left: 32px;
    border-top: none;
    border-left: 1px solid var(--card-border);
    align-self: stretch;
  }
}