assets/css/heat-map.scss
.outer-box {
  width: 100%;
  display: flex;
  justify-content: center;
  margin: 12px 0;

  --heat-level-0: color-mix(in srgb, var(--red-0) 10%, white);
  --heat-level-1: color-mix(in srgb, var(--red-0) 40%, white);
  --heat-level-2: color-mix(in srgb, var(--red-0) 80%, white);
  --heat-level-3: var(--red-0);
  --heat-level-4: color-mix(in srgb, var(--red-0) 80%, black);
}

[data-theme="dark"] .outer-box {
  --heat-level-0: #161b22;
  --heat-level-1: color-mix(in srgb, var(--red-0) 30%, transparent);
  --heat-level-2: color-mix(in srgb, var(--red-0) 50%, transparent);
  --heat-level-3: color-mix(in srgb, var(--red-0) 70%, transparent);
  --heat-level-4: var(--red-0);
}

.calendar-container {
  display: grid;
  grid: auto repeat(7, 10px) auto / auto repeat(53, 10px);
  gap: 3px;

  margin: 0 1px 1px;
  width: fit-content;
  font-size: 12px;
  padding: 12px;
  border: solid 1px var(--color-border);
  border-radius: 8px;
}

.month {
  grid-row: 1/2;
  margin-bottom: -2px;
}

.week {
  grid-row: 3;
  grid-column: 1/2;
  line-height: 10px;
  margin-right: 2px;
}
.week + .week {
  grid-row: 5;
}
.week + .week + .week {
  grid-row: 7;
}

.tiles {
  grid-column: 2/56;
  grid-row: 2/9;

  display: grid;
  grid-auto-flow: column;
  grid-template: subgrid / subgrid;
}

.tile {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  outline: 1px solid color-mix(in srgb, var(--red-2) 10%, transparent);
  outline-offset: -1px;
}
.tile[data-level="0"] {
  background: var(--heat-level-0);
  // outline: none;
}
.tile[data-level="1"] {
  background: var(--heat-level-1);
}
.tile[data-level="2"] {
  background: var(--heat-level-2);
}
.tile[data-level="3"] {
  background: var(--heat-level-3);
}
.tile[data-level="4"] {
  background: var(--heat-level-4);
}

i.tile:hover {
  outline: 1px solid var(--red-2);
}

$line-height: 1.8em;

#heatmap-tooltip {
  position: fixed;
  z-index: 1000;
  padding: 8px;
  background-color: var(--color-background);
  border-radius: 8px;
  border: solid 1px var(--color-border);
  box-shadow: var(--shadow-meta);
  font-size: 12px;
  color: var(--color-default);
  max-width: 250px;
  display: none; /* Initially hidden */

  ul {
    margin: 0 20px;
    line-height: $line-height;
    list-style: disc;
    margin-top: ($line-height / 2);
    margin-bottom: ($line-height / 2);
  }

  li {
    &:hover {
      &::marker {
        transition: color 0.2s;
        color: var(--red-1);
      }
    }
  }

  a {
    color: var(--color-link);
    text-decoration: none;
    word-break: break-word;

    &:hover {
      text-decoration: underline;
    }
  }

  .tooltip-header {
    display: flex;
    justify-content: space-between;
    align-items: center;

    .tooltip-header-content {
      font-weight: bold;
      font-size: 16px;
      color: var(--color-default);
    }

    .tooltip-close {
      padding: 0 0 0 8px;
      color: var(--color-link);
      font-weight: bold;
      font-size: 12px;
      cursor: var(--cursor-pointer);
    }
  }

  .tooltip-content {
    max-height: 300px;
    overflow-y: auto;
    line-height: 1.2;
  }
}

.total {
  grid-column: 2/30;
  grid-row: 9;
  margin-top: 4px;
}

.legend {
  grid-column: 30/53;
  grid-row: 9;
  margin-top: 4px;

  display: flex;
  gap: 6px;
  justify-content: right;
  align-items: center;
}

.year-select {
  height: 146px;
  padding: 4px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex-shrink: 0;
  box-sizing: border-box;

  &::-webkit-scrollbar {
    width: 8px;
    height: 8px;
    background-color: transparent;
  }

  &::-webkit-scrollbar-track {
    background-color: transparent;
  }
}

.year-option {
  padding: 4px 20px;
  border-radius: 8px;
  cursor: var(--cursor-pointer) !important;
}

.year-option:hover {
  background-color: var(--heat-level-1);
}

.year-option.active {
  background-color: var(--heat-level-2);
  color: white;
}

.inner-box {
  overflow: auto;

  &::-webkit-scrollbar {
    width: 8px;
    height: 8px;
    background-color: transparent;
  }

  &::-webkit-scrollbar-track {
    background-color: transparent;
  }
}

@media screen and (max-width: 768px) {
  .year-select {
    width: 100%;
    height: auto;
    flex-direction: row;
    justify-content: start;
    align-items: center;
  }

  .outer-box {
    flex-direction: column;
  }

  .inner-box {
    width: 100%;
    overflow-x: auto;
  }
}
