/* GitHub-style activity heatmap for archive/category/tag pages */
.activity-heatmap {
  --activity-cell-size: clamp(10px, 2.8vw, 11px);
  --activity-cell-gap: 3px;
  --activity-weekday-width: clamp(1.55rem, 5vw, 1.75rem);
  --activity-level-0: color-mix(in srgb, rgb(var(--mdui-color-primary)) 4%, rgb(var(--mdui-color-surface)));
  --activity-level-1: color-mix(in srgb, rgb(var(--mdui-color-primary)) 30%, rgb(var(--mdui-color-surface)));
  --activity-level-2: color-mix(in srgb, rgb(var(--mdui-color-primary)) 55%, rgb(var(--mdui-color-surface)));
  --activity-level-3: color-mix(in srgb, rgb(var(--mdui-color-primary)) 80%, rgb(var(--mdui-color-surface)));
  --activity-level-4: rgb(var(--mdui-color-primary));
  width: 100%;
  margin: 0 0 1.5rem;
  box-sizing: border-box;
}

.notes-header + .activity-heatmap {
  margin-top: -1.5rem;
}

.activity-heatmap__inner {
  padding: 0.25rem clamp(1rem, 3vw, 1.25rem) clamp(1rem, 3vw, 1.25rem);
  box-sizing: border-box;
}

.activity-heatmap__header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  margin-bottom: 1rem;
}

.activity-heatmap__title-block {
  min-width: 0;
}

.activity-heatmap__summary {
  min-height: var(--mdui-typescale-body-medium-line-height, 1.25rem);
  margin: 0.35rem 0 0;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: var(--mdui-typescale-body-medium-size, 0.875rem);
  line-height: var(--mdui-typescale-body-medium-line-height, 1.25rem);
}

.activity-heatmap__viewport-wrap {
  --vp-pad-top: 0.25rem;
  --vp-row-h: 1.1rem;
  --body-gap: 0.45rem;
  --weekday-pad-right: 0.4rem;
  position: relative;
}

.activity-heatmap__viewport {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  padding: var(--vp-pad-top) 0 0.6rem;
  scrollbar-width: none;
}

.activity-heatmap__viewport::-webkit-scrollbar {
  display: none;
}

.activity-heatmap__viewport-scroll-hint {
  position: absolute;
  top: calc(var(--vp-pad-top) + 2 * var(--vp-row-h) + 3 * (var(--activity-cell-size) + var(--activity-cell-gap)));
  height: var(--activity-cell-size);
  width: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
  opacity: 0;
  transition: opacity 0.2s;
  cursor: pointer;
  pointer-events: none;
}

.activity-heatmap__viewport-scroll-hint--visible {
  opacity: 1;
  pointer-events: auto;
}

.activity-heatmap__viewport-scroll-hint--left {
  left: calc(var(--activity-weekday-width) + var(--weekday-pad-right) + var(--body-gap));
  background: linear-gradient(to right, rgb(var(--mdui-color-surface) / 0.85) 20%, transparent);
}

.activity-heatmap__viewport-scroll-hint--right {
  right: 0;
  background: linear-gradient(to left, rgb(var(--mdui-color-surface) / 0.85) 20%, transparent);
}

.activity-heatmap__viewport-scroll-hint .scroll-arrow {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgb(var(--mdui-color-surface));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 16px;
  line-height: 1;
  user-select: none;
  box-shadow: 0 1px 3px rgb(var(--mdui-color-shadow) / 0.12);
}

.activity-heatmap__calendar {
  width: max-content;
  min-width: 100%;
  padding-right: 12px;
}

.activity-heatmap__months {
  display: grid;
  grid-template-columns: repeat(var(--activity-week-count, 53), var(--activity-cell-size));
  column-gap: var(--activity-cell-gap);
  min-height: var(--vp-row-h);
  margin-left: calc(var(--activity-weekday-width) + var(--body-gap));
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 0.6875rem;
  line-height: 1rem;
}

.activity-heatmap__month {
  min-width: 0;
  white-space: nowrap;
}

.activity-heatmap__years {
  display: grid;
  grid-template-columns: repeat(var(--activity-week-count, 53), var(--activity-cell-size));
  column-gap: var(--activity-cell-gap);
  min-height: var(--vp-row-h);
  margin-left: calc(var(--activity-weekday-width) + var(--body-gap));
  color: rgb(var(--mdui-color-primary));
  font-size: 0.75rem;
  line-height: 1rem;
  font-weight: 600;
}

.activity-heatmap__year {
  min-width: 0;
  white-space: nowrap;
}

.activity-heatmap__body {
  display: flex;
  align-items: flex-start;
  gap: var(--body-gap);
}

.activity-heatmap__weekdays {
  display: grid;
  grid-template-rows: repeat(7, var(--activity-cell-size));
  gap: var(--activity-cell-gap);
  width: var(--activity-weekday-width);
  flex: 0 0 var(--activity-weekday-width);
  padding-right: var(--weekday-pad-right);
  box-sizing: content-box;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 0.6875rem;
  line-height: var(--activity-cell-size);
  text-align: right;
  position: sticky;
  left: 0;
  z-index: 2;
  background-color: rgb(var(--mdui-color-surface));
}

.activity-heatmap__weekday {
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
}

.activity-heatmap__cells {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: var(--activity-cell-size);
  grid-template-rows: repeat(7, var(--activity-cell-size));
  gap: var(--activity-cell-gap);
}

.activity-heatmap__day {
  width: var(--activity-cell-size);
  height: var(--activity-cell-size);
  min-width: var(--activity-cell-size);
  min-height: var(--activity-cell-size);
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 2px;
  cursor: pointer;
  background-color: var(--activity-level-0);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, rgb(var(--mdui-color-on-surface)) 7%, transparent);
}

.activity-heatmap__day[data-level='1'],
.activity-heatmap__legend-swatch[data-level='1'] {
  background-color: var(--activity-level-1);
}

.activity-heatmap__day[data-level='2'],
.activity-heatmap__legend-swatch[data-level='2'] {
  background-color: var(--activity-level-2);
}

.activity-heatmap__day[data-level='3'],
.activity-heatmap__legend-swatch[data-level='3'] {
  background-color: var(--activity-level-3);
}

.activity-heatmap__day[data-level='4'],
.activity-heatmap__legend-swatch[data-level='4'] {
  background-color: var(--activity-level-4);
}

.activity-heatmap__day[data-outside-year='true'] {
  visibility: hidden;
  pointer-events: none;
}

.activity-heatmap__spacer {
  width: var(--activity-cell-size);
  height: var(--activity-cell-size);
  min-width: var(--activity-cell-size);
  min-height: var(--activity-cell-size);
  visibility: hidden;
  pointer-events: none;
}

.activity-heatmap__day:hover,
.activity-heatmap__day:focus-visible,
.activity-heatmap__day[data-active='true'] {
  outline: 2px solid rgb(var(--mdui-color-primary));
  outline-offset: 1px;
}

.activity-heatmap__day:focus:not(:focus-visible) {
  outline: none;
}

.activity-heatmap__legend {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.35rem;
  margin-top: 0.15rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 0.6875rem;
  line-height: 1rem;
}

.activity-heatmap__legend-swatch {
  width: var(--activity-cell-size);
  height: var(--activity-cell-size);
  border-radius: 2px;
  background-color: var(--activity-level-0);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, rgb(var(--mdui-color-on-surface)) 7%, transparent);
}

.activity-heatmap__detail {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--app-divider-hairline);
}

.activity-heatmap__detail[hidden],
.activity-heatmap__empty[hidden] {
  display: none !important;
}

.activity-heatmap__detail-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.activity-heatmap__detail-title {
  margin: 0;
  color: rgb(var(--mdui-color-on-surface));
  font-size: var(--mdui-typescale-title-medium-size, 1rem);
  line-height: var(--mdui-typescale-title-medium-line-height, 1.5rem);
  font-weight: 600;
}

.activity-heatmap__detail-summary {
  margin: 0.2rem 0 0;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: var(--mdui-typescale-body-small-size, 0.75rem);
  line-height: var(--mdui-typescale-body-small-line-height, 1rem);
}

.activity-heatmap__detail-list {
  position: relative;
  display: block;
  overflow-x: auto;
  overflow-y: hidden;
  height: clamp(140px, 30vw, 150px);
  padding: 1rem 0 1.5rem;
  scrollbar-width: thin;
}

.activity-heatmap__detail-list::before {
  content: '';
  position: absolute;
  top: var(--detail-axis-top);
  left: 0;
  width: max(100%, var(--timeline-scroll-width, 100%));
  height: 2px;
  background-color: var(--app-divider-hairline, rgb(var(--mdui-color-outline-variant)));
  z-index: 0;
}

.timeline-item {
  position: absolute;
  top: calc(var(--detail-axis-top) - 5px);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: clamp(84px, 24vw, 100px);
  transform: translateX(-50%);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.timeline-item--above {
  top: auto;
  bottom: calc(var(--detail-axis-top) - 5px);
  flex-direction: column;
}

.timeline-item--above .timeline-marker {
  margin-bottom: 0;
  margin-top: 0.6rem;
}

.timeline-marker {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: rgb(var(--mdui-color-primary));
  margin-bottom: 0.6rem;
  flex-shrink: 0;
}

.timeline-content {
  text-align: center;
}

.timeline-content .timeline-title {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  color: rgb(var(--mdui-color-on-surface));
  font-size: var(--mdui-typescale-body-small-size, 0.75rem);
  line-height: var(--mdui-typescale-body-small-line-height, 1rem);
  text-decoration: none;
  word-break: break-word;
}

.timeline-item:hover .timeline-title {
  text-decoration: underline;
}

.timeline-date {
  display: block;
  margin-bottom: 0.3rem;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: var(--mdui-typescale-label-small-size, 0.6875rem);
  line-height: var(--mdui-typescale-label-small-line-height, 1rem);
}

.activity-heatmap__detail-list-wrap {
  --detail-axis-top: 50%;
  --detail-hint-size: 36px;
  position: relative;
}

.activity-heatmap__detail-scroll-hint {
  position: absolute;
  top: calc(var(--detail-axis-top) - var(--detail-hint-size) / 2);
  width: var(--detail-hint-size);
  height: var(--detail-hint-size);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
  opacity: 0;
  transition: opacity 0.2s;
  cursor: pointer;
  pointer-events: none;
}

.activity-heatmap__detail-scroll-hint--visible {
  opacity: 1;
  pointer-events: auto;
}

.activity-heatmap__detail-scroll-hint--left { left: 0; }
.activity-heatmap__detail-scroll-hint--right { right: 0; }

.activity-heatmap__detail-scroll-hint .scroll-arrow {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgb(var(--mdui-color-surface));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: 18px;
  line-height: 1;
  user-select: none;
  box-shadow: 0 1px 3px rgb(var(--mdui-color-shadow) / 0.12);
}

.activity-heatmap__detail-empty {
  min-height: 2.25rem;
  display: flex;
  align-items: center;
  color: rgb(var(--mdui-color-on-surface-variant));
  font-size: var(--mdui-typescale-body-small-size, 0.75rem);
  line-height: var(--mdui-typescale-body-small-line-height, 1rem);
}

.activity-heatmap__empty {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 7rem;
  color: rgb(var(--mdui-color-on-surface-variant));
}

.activity-heatmap__empty-icon {
  width: 22px;
  height: 22px;
  font-size: 22px;
  opacity: 0.7;
}