/*
 * calendar.css — Calendar layout: day view + shared chrome (header, body, fullscreen, drag-nav).
 *
 * Day view: time axis (left) + scrollable timeline (right).
 * Week view: time axis + 7 day columns. The timeline is a 1440px canvas
 * (24h × 60px/hour) with absolutely positioned hour lines and entry cards.
 * Load after base.css.
 */

/* ---- Container --------------------------------------------------------- */
.calendar {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

/* ---- Header: date navigation ------------------------------------------ */
.calendar__header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.calendar__nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.calendar__nav-btn {
  height: 32px;
  padding: 4px 12px;
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
}

.calendar__nav-btn:hover {
  background: var(--bg);
}

.calendar__nav-btn:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 1px;
}

.calendar__nav-btn--today {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: transparent;
}

.calendar__nav-btn--today:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.calendar__date {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
}

/* ---- View toggle -------------------------------------------------------- */
.calendar__view-toggle {
  display: flex;
  gap: 0;
  margin-left: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.calendar__view-btn {
  height: 30px;
  padding: 4px 14px;
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.calendar__view-btn[aria-pressed="true"] {
  color: var(--accent);
  background: var(--accent-soft);
}

.calendar__view-btn:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: -3px;
}

/* ---- Body: main area --------------------------------------------------- */
.calendar__body {
  flex: 1;
  display: flex;
  min-height: 0;
  position: relative;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

/* ---- Day view: scrollable time axis + timeline -------------------------- */
.calendar__scroll {
  flex: 1;
  display: flex;
  overflow-y: auto;
  min-width: 0;
}

/* Day view uses column layout so the all-day strip sits above the timeline row. */
#calendar-day-view {
  flex-direction: column;
}

.calendar__day-row {
  display: flex;
  flex-shrink: 0;
}

/* All-day strip: compact row above the 00:00 line for all-day entries. */
.calendar__allday {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-bottom: 1px solid var(--border);
  min-height: 28px;
  background: var(--surface);
  flex-shrink: 0;
}

/* Time axis: fixed-width column with hour labels. */
.calendar__time-axis {
  flex: 0 0 52px;
  position: relative;
  height: 1440px;
  border-right: 1px solid var(--border);
  background: linear-gradient(
    to bottom,
    var(--timeline-night) 0%,
    var(--timeline-night) calc(var(--sunrise-pct, 25%) - 4%),
    var(--surface) calc(var(--sunrise-pct, 25%) + 4%),
    var(--surface) calc(var(--sunset-pct, 75%) - 4%),
    var(--timeline-night) calc(var(--sunset-pct, 75%) + 4%),
    var(--timeline-night) 100%
  );
}

.calendar__time-axis--right {
  display: none;
  border-right: none;
  border-left: 1px solid var(--border);
}

:root[data-fullscreen] .calendar__time-axis--right {
  display: block;
}

.calendar__time-axis--right .calendar__time-axis__hour {
  right: auto;
  left: 6px;
  flex-direction: row-reverse;
}

.calendar__time-axis__hour {
  position: absolute;
  right: 6px;
  transform: translateY(-50%);
  font-size: 0.6875rem;
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  user-select: none;
  display: flex;
  align-items: center;
  gap: 2px;
}

.calendar__time-axis__icon {
  position: absolute;
  left: 4px;
  font-size: 0.625rem;
  line-height: 1;
  opacity: 0.7;
  transform: translateY(-50%);
}

/* Timeline: the main canvas. 1440px tall (24h × 60px). */
.calendar__timeline {
  flex: 1;
  position: relative;
  height: 1440px;
  min-width: 0;
  cursor: crosshair;
  background: linear-gradient(
    to bottom,
    var(--timeline-night) 0%,
    var(--timeline-night) calc(var(--sunrise-pct, 25%) - 4%),
    var(--surface) calc(var(--sunrise-pct, 25%) + 4%),
    var(--surface) calc(var(--sunset-pct, 75%) - 4%),
    var(--timeline-night) calc(var(--sunset-pct, 75%) + 4%),
    var(--timeline-night) 100%
  );
}

.calendar__timeline--drag-over {
  background: var(--accent-soft);
}

.calendar__hour-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
  border-top: 1px solid color-mix(in srgb, var(--border) 60%, transparent);
  pointer-events: none;
}

/* Now line: red indicator at the current time. */
.calendar__now-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--danger);
  border-radius: 1px;
  pointer-events: none;
  z-index: 2;
}

.calendar__now-line::before {
  content: '';
  position: absolute;
  left: -5px;
  top: -4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--danger);
}

.calendar__now-line__time {
  position: absolute;
  left: 50%;
  top: -10px;
  transform: translateX(-50%);
  font-size: 0.625rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--danger);
  background: var(--surface);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  border-radius: 999px;
  padding: 1px 6px;
  line-height: 1.4;
  white-space: nowrap;
}

/* ---- Reduced motion ---------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  .calendar__nav-btn {
    transition: none;
  }
}

/* ---- Fullscreen button -------------------------------------------------- */
.calendar__fullscreen-btn {
  height: 30px;
  width: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  padding: 0;
  transition: color var(--transition), border-color var(--transition);
}

.calendar__fullscreen-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.calendar__fullscreen-btn:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 1px;
}

/* ---- Fullscreen mode ---------------------------------------------------- */
:root[data-fullscreen] .content {
  max-width: none;
  padding: 0 0 8px;
}

:root[data-fullscreen] .calendar__body {
  border-radius: 0;
  box-shadow: none;
}

:root[data-fullscreen] .calendar__header {
  padding: 12px 16px;
  margin-bottom: 8px;
  border-bottom: none;
  background: var(--surface);
}

/* ---- Empty state hint --------------------------------------------------- */
.calendar__empty-hint {
  position: sticky;
  top: 120px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}

/* ---- Drag navigation zones --------------------------------------------- */
.calendar__drag-nav {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  opacity: 0;
  pointer-events: none;
  z-index: 20;
  transition: opacity 200ms ease;
  user-select: none;
}

.calendar__drag-nav--left {
  left: -72px;
  clip-path: polygon(0% 50%, 35% 0%, 100% 0%, 100% 100%, 35% 100%);
}

.calendar__drag-nav--right {
  right: -72px;
  clip-path: polygon(0% 0%, 65% 0%, 100% 50%, 65% 100%, 0% 100%);
}

.calendar__drag-nav--hint {
  opacity: 0.5;
}

.calendar__drag-nav--visible {
  opacity: 1;
}