/* calendar.css — Stage 1: month toolbar, weekday grid, day cells (tray / green fill / today /
   selected), legend and the "Show weekends" switch. Colours come from tokens.css. */

.calendar {
  --cols: 5;
  --calendar-cell: 88px;
  --calendar-gap: 14px;
  --calendar-width: calc(var(--cols) * var(--calendar-cell) + (var(--cols) - 1) * var(--calendar-gap));
}

/* ---------- Toolbar ---------- */
.calendar__toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  max-width: var(--calendar-width);
  margin: 0 auto var(--space-4);
}

.calendar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.calendar__month {
  min-width: 9.5em;
  text-align: center;
  font-size: var(--text-sm);
  font-weight: 600;
}

.calendar__tools {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

/* ---------- Switch (real checkbox, visually a toggle) ---------- */
.switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 40px;
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  user-select: none;
}

/* The real checkbox covers the whole label (invisible) so every tap lands on the control itself. */
.switch__input {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.switch__track {
  position: relative;
  width: 36px;
  height: 20px;
  border-radius: var(--radius-pill);
  background: var(--line-strong);
  transition: background var(--dur-fast);
}

.switch__track::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-fast) var(--ease);
}

.switch__input:checked + .switch__track {
  background: var(--ink);
}

.switch__input:checked + .switch__track::after {
  transform: translateX(16px);
}

.switch__input:focus-visible + .switch__track {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

/* Shown while weekend columns are on only because today is a weekend day. */
.calendar__note {
  max-width: var(--calendar-width);
  margin: calc(var(--space-2) * -1) auto var(--space-3);
  font-size: var(--text-xs);
  text-align: right;
}

/* ---------- Grid ---------- */
/* Vertically stacked months (the current one + any revealed with "Show next month"). */
.calendar__months {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}

.calendar__month-block {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.calendar__month-title {
  width: 100%;
  max-width: var(--calendar-width);
  margin: 0 auto var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-align: left;
}

/* "Show next month" — centred under the calendar. */
.calendar__more {
  display: flex;
  margin: var(--space-5) auto 0;
}

.calendar__grid {
  display: grid;
  grid-template-columns: repeat(var(--cols), minmax(0, 1fr));
  gap: var(--calendar-gap);
  width: 100%;
  max-width: var(--calendar-width);
  margin: 0 auto;
}

.calendar__weekday {
  margin-bottom: calc(var(--calendar-gap) * -0.5);
  text-align: center;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- Day cell ---------- */
.calendar__day {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  aspect-ratio: 1;
  min-width: 0;
  padding: 8px 10px;
  overflow: hidden;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--ink);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1;
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--dur-fast),
    box-shadow var(--dur-fast);
}

.calendar__day:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.calendar__day:focus-visible {
  outline-offset: 3px;
}

.calendar__num {
  position: relative;
}

/* Empty day: light-gray tray filling the bottom ~45%. */
.calendar__fill {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 45%;
  background: var(--tray);
  pointer-events: none;
}

/* A day only turns green once a task is actually **done** (calendar.js adds --planned when done > 0).
   Green border and one green stripe (a tenth of the cell) per done task, ten at most. The fill is
   done/10 of the cell tall and its bands are fill/done tall, so every band is exactly one tenth of
   the cell whatever the count. A day with tasks but nothing done shows the plain gray tray. */
.calendar__day--planned {
  border-color: var(--green);
}

.calendar__day--planned .calendar__fill {
  height: calc(var(--done, 0) / 10 * 100%);
  min-height: 4px;
  background-color: var(--green-fill);
  background-image: linear-gradient(to top, var(--green-fill) 0 calc(100% - 2px), var(--green-stripe) calc(100% - 2px) 100%);
  background-size: 100% calc(100% / max(var(--done, 0), 1));
  background-repeat: repeat-y;
  background-position: bottom;
}

/* Today: blue border; no tray unless it has tasks (as on the design board). */
.calendar__day--today {
  border: 2px solid var(--today);
}

.calendar__day--today:not(.calendar__day--planned) .calendar__fill {
  display: none;
}

/* Selected day (the one open in stages 2–5): soft blue ring. */
.calendar__day--selected {
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--today) 35%, transparent);
}

.calendar__day--selected:hover {
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--today) 35%, transparent),
    var(--shadow-sm);
}

/* ---------- Legend ---------- */
/* Legend + the subtle "demo version" link on one centred row (wraps on narrow screens). */
.calendar__footer {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: var(--space-2) var(--space-4);
  margin-top: var(--space-4);
}

.calendar__legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2) var(--space-5);
  max-width: var(--calendar-width);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-xs);
  color: var(--muted);
}

.calendar__demo-row {
  display: flex;
  justify-content: center;
  margin-top: var(--space-6);
}

.calendar__demo {
  font-size: var(--text-xs);
  color: var(--muted);
  opacity: 0.65;
  transition: opacity var(--dur-fast), color var(--dur-fast);
}

.calendar__demo:hover,
.calendar__demo:focus-visible {
  opacity: 1;
  color: var(--ink);
}

.calendar__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.calendar__swatch {
  position: relative;
  width: 16px;
  height: 16px;
  overflow: hidden;
  border: 1.5px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
}

.calendar__swatch::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 45%;
  background: var(--tray);
}

.calendar__swatch--done {
  border-color: var(--green);
}

.calendar__swatch--done::after {
  height: 60%;
  background: repeating-linear-gradient(to top, var(--green-stripe) 0 1px, var(--green-fill) 1px 4px);
}

.calendar__swatch--today {
  border: 2px solid var(--today);
}

.calendar__swatch--today::after {
  display: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 639px) {
  .calendar {
    --calendar-gap: 8px;
  }

  .calendar--weekends {
    --calendar-gap: 6px;
  }

  .calendar__day {
    border-radius: var(--radius-md);
    padding: 5px 7px;
    font-size: var(--text-md);
  }

  .calendar__month {
    min-width: 8em;
  }
}

/* ---------- Manage mode: flip the calendar, preview tasks, edit a day in a popup ---------- */
.calendar__flip {
  gap: 6px;
}

/* Each day turns over on its own (staggered by --flip-delay) rather than the whole board flipping
 * as one sheet. */
.calendar__day--flipping {
  animation: cell-flip 0.4s ease both;
  animation-delay: var(--flip-delay, 0ms);
  transform-origin: center;
  backface-visibility: hidden;
}

@keyframes cell-flip {
  0% {
    transform: perspective(600px) rotateY(0);
  }
  50% {
    transform: perspective(600px) rotateY(90deg);
    opacity: 0.4;
  }
  100% {
    transform: perspective(600px) rotateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .calendar__day--flipping {
    animation: none;
  }
}

/* In manage mode the cell previews the day's task titles instead of the green fill. */
.calendar--flipped .calendar__fill {
  display: none;
}

.calendar__preview {
  position: absolute;
  inset: 26px 6px 6px;
  display: flex;
  flex-direction: column;
  gap: 1px;
  overflow: hidden;
  font-size: 9px;
  line-height: 1.3;
  text-align: left;
  color: var(--muted);
  pointer-events: none;
}

.calendar__preview-item {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.calendar__preview-item.is-done {
  text-decoration: line-through;
  opacity: 0.55;
}

.calendar--flipped .calendar__day {
  cursor: pointer;
}

/* Day popup (add / rename / tick / delete a single day's tasks). */
.day-pop {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 340px;
  max-width: 100%;
}

.day-pop__add {
  display: flex;
  gap: var(--space-2);
}

.day-pop__add-input {
  flex: 1;
  min-width: 0;
  min-height: 38px;
  padding: 0 var(--space-3);
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
}

.day-pop__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  max-height: 46vh;
  overflow-y: auto;
}

.day-pop__row {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.day-pop__title {
  flex: 1;
  min-width: 0;
  min-height: 36px;
  padding: 0 var(--space-2);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  font-size: var(--text-sm);
}

.day-pop__title:hover,
.day-pop__title:focus {
  border-color: var(--card-border);
  background: var(--surface);
}

.day-pop__row.task-card--done .day-pop__title {
  text-decoration: line-through;
  color: var(--muted);
}

.day-pop__del {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  color: var(--red);
  opacity: 0.6;
}

.day-pop__del:hover,
.day-pop__del:focus-visible {
  opacity: 1;
  background: var(--red-fill);
}

.day-pop__empty {
  padding: var(--space-3);
  text-align: center;
  font-size: var(--text-sm);
}

/* ---------- Time report ---------- */
.calendar__analysis {
  gap: 6px;
}

.analysis {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 340px;
  max-width: 100%;
}

.analysis__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: 46vh;
  overflow-y: auto;
}

.analysis__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 6px 8px;
  border-radius: var(--radius-sm);
}

.analysis__row:nth-child(odd) {
  background: var(--surface-2);
}

.analysis__task {
  min-width: 0;
  overflow-wrap: anywhere;
}

.analysis__count {
  color: var(--muted);
  font-size: var(--text-xs);
}

.analysis__time {
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.analysis__total {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-1);
  padding: var(--space-2) 8px 0;
  border-top: 1.5px solid var(--border);
  font-weight: 700;
}

.analysis__empty {
  padding: var(--space-3);
  text-align: center;
}