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Edit File: diff-table.scss

// You can compile this with https://www.sassmeister.com

$diff-bg-color: #fff !default;
$diff-text-color: invert($diff-bg-color) !default;

$diff-bg-color-ins-base: #8e8 !default;
$diff-bg-color-del-base: #e88 !default;
$diff-bg-color-rep-base: #fbdb65 !default;

$diff-op-highlight-ratio: 90% !default;
$diff-op-normal-ratio: 25% !default;

// emphasized colors for detailed inline difference
$diff-bg-color-ins-highlight: mix($diff-bg-color-ins-base, $diff-bg-color, $diff-op-highlight-ratio) !default;
$diff-bg-color-del-highlight: mix($diff-bg-color-del-base, $diff-bg-color, $diff-op-highlight-ratio) !default;

// colors for operation rows
$diff-bg-color-ins: mix($diff-bg-color-ins-base, $diff-bg-color, $diff-op-normal-ratio) !default;
$diff-bg-color-del: mix($diff-bg-color-del-base, $diff-bg-color, $diff-op-normal-ratio) !default;
$diff-bg-color-rep: mix($diff-bg-color-rep-base, $diff-bg-color, $diff-op-normal-ratio) !default;

$diff-table-head-color: mix($diff-bg-color, $diff-text-color, 65%) !default;
$diff-table-sidebar-color: mix($diff-bg-color, $diff-text-color, 80%) !default;
$diff-border-color: $diff-text-color !default;

// color for the nonexistent block
// for example, there are a deleted line that has no corresponding one
$diff-bg-color-none-block: mix($diff-bg-color, $diff-table-sidebar-color, 80%) !default;
$diff-bg-color-none-block-alternative: mix($diff-bg-color, $diff-table-sidebar-color, 55%) !default;

// symbol images
$img-space: 'data:image/svg+xml,%3Csvg preserveAspectRatio="xMinYMid meet" viewBox="0 0 12 24" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M4.5 11C4.5 10.1716 5.17157 9.5 6 9.5C6.82843 9.5 7.5 10.1716 7.5 11C7.5 11.8284 6.82843 12.5 6 12.5C5.17157 12.5 4.5 11.8284 4.5 11Z" fill="rgba%2860, 60, 60, 50%25%29"/%3E%3C/svg%3E' !default;
$img-tab: 'data:image/svg+xml,%3Csvg preserveAspectRatio="xMinYMid meet" viewBox="0 0 12 24" xmlns="http://www.w3.org/2000/svg"%3E%3Cpath d="M9.5 10.44L6.62 8.12L7.32 7.26L12.04 11V11.44L7.28 14.9L6.62 13.9L9.48 11.78H0V10.44H9.5Z" fill="rgba%2860, 60, 60, 50%25%29"/%3E%3C/svg%3E' !default;

.diff-wrapper.diff {
  --tab-size: 4;

background: repeating-linear-gradient(
    -45deg,
    $diff-bg-color-none-block,
    $diff-bg-color-none-block 0.5em,
    $diff-bg-color-none-block-alternative 0.5em,
    $diff-bg-color-none-block-alternative 1em
  );
  border-collapse: collapse;
  border-spacing: 0;
  border: 1px solid $diff-border-color;
  color: $diff-text-color;
  empty-cells: show;
  font-family: monospace;
  font-size: 13px;
  width: 100%;
  word-break: break-all;

th {
    font-weight: 700;
    cursor: default;
    -webkit-user-select: none;
    user-select: none;
  }

td {
    vertical-align: baseline;
  }

td,
  th {
    border-collapse: separate;
    border: none;
    padding: 1px 2px;
    background: $diff-bg-color;

// make empty cell has height
    &:empty:after {
      content: ' ';
      visibility: hidden;
    }

a {
      color: #000;
      cursor: inherit;
      pointer-events: none;
    }
  }

thead th {
    background: $diff-table-head-color;
    border-bottom: 1px solid $diff-border-color;
    padding: 4px;
    text-align: left;
  }

tbody {
    &.skipped {
      border-top: 1px solid $diff-border-color;

td,
      th {
        display: none;
      }
    }

th {
      background: $diff-table-sidebar-color;
      border-right: 1px solid $diff-border-color;
      text-align: right;
      vertical-align: top;
      width: 4em;

&.sign {
        background: $diff-bg-color;
        border-right: none;
        padding: 1px 0;
        text-align: center;
        width: 1em;

&.del {
          background: $diff-bg-color-del;
        }

&.ins {
          background: $diff-bg-color-ins;
        }
      }
    }
  }

&.diff-html {
    white-space: pre-wrap;
    tab-size: var(--tab-size);

.ch {
      line-height: 1em;
      background-clip: border-box;
      background-repeat: repeat-x;
      background-position: left center;

&.sp {
        background-image: url($img-space);
        background-size: 1ch 1.25em;
      }
      &.tab {
        background-image: url($img-tab);
        background-size: calc(var(--tab-size) * 1ch) 1.25em;
        background-position: 2px center;
      }
    }

.change {
      &.change-eq {
        .old,
        .new {
          background: $diff-bg-color;
        }
      }

.old {
        background: $diff-bg-color-del;
      }

.new {
        background: $diff-bg-color-ins;
      }

.rep {
        background: $diff-bg-color-rep;
      }

.old,
      .new,
      .rep {
        &.none {
          background: transparent;
          cursor: not-allowed;
        }
      }

ins,
      del {
        font-weight: bold;
        text-decoration: none;
      }

ins {
        background: $diff-bg-color-ins-highlight;
      }

del {
        background: $diff-bg-color-del-highlight;
      }
    }
  }
}

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