// Default styles for Markdown element
// --------
// 1. Links
// 2. Headings
// 3. Images
// 4. Blockquotes
// 5. Horizontal rules
// 6. Lists
// 7. Tables
// 8. Code blocks

// Functions
// Note: The inlined base font size is set in common/functions/font.js. It should match $osdMdFontSize.
$osdDefaultFontSize: 14px;

@function canvasToEm($size) {
  @return #{$size / $osdDefaultFontSize}em;
}

.osdMarkdown__body {
  // Font size variables
  $osdMarkdownFontSizeS: canvasToEm(12px);
  $osdMarkdownFontSize: canvasToEm(14px);
  $osdMarkdownFontSizeL: canvasToEm(20px);
  $osdMarkdownFontSizeXL: canvasToEm(28px);
  $osdMarkdownFontSizeXXL: canvasToEm(36px);

  // Spacing variables
  $osdMarkdownSizeL: canvasToEm(24px);
  $osdMarkdownSize: canvasToEm(16px);
  $osdMarkdownSizeS: canvasToEm(12px);
  $osdMarkdownSizeXS: canvasToEm(8px);
  $osdMarkdownSizeXXS: canvasToEm(4px);

  // Grayscale variables
  $osdMarkdownAlphaLightestShade: rgba($euiColorFullShade, 0.05);
  $osdMarkdownAlphaLightShade: rgba($euiColorFullShade, 0.15);
  $osdMarkdownAlphaDarkShade: rgba($euiColorFullShade, 0.65);

  // Reverse grayscale for opposite of theme
  $osdMarkdownAlphaLightestShadeReversed: rgba($euiColorEmptyShade, 0.05);
  $osdMarkdownAlphaLightShadeReversed: rgba($euiColorEmptyShade, 0.15);
  $osdMarkdownAlphaDarkShadeReversed: rgba($euiColorEmptyShade, 0.65);

  &--reversed {
    color: $euiColorLightestShade;
  }

  > *:first-child {
    margin-top: 0 !important;
  }

  > *:last-child {
    margin-bottom: 0 !important;
  }

  p,
  blockquote,
  ul,
  ol,
  dl,
  table,
  pre {
    margin-top: 0;
    margin-bottom: $osdMarkdownSize;
    line-height: 1.5em;
  }

  strong {
    font-weight: 600;
  }

  // 1. Links
  a {
    color: inherit;
    text-decoration: underline;
  }

  a:hover {
    text-decoration: underline dotted;
  }

  a:active,
  a:hover {
    outline-width: 0;
  }

  a:not([href]) {
    color: inherit;
    text-decoration: none;
  }

  // 2. Headings
  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    margin-top: 0;
    margin-bottom: $osdMarkdownSizeXS;
  }

  h1 {
    font-size: $osdMarkdownFontSizeXXL;
    /* stylelint-disable-next-line number-max-precision */
    line-height: 1.333333em;
    font-weight: 300;
  }

  h2 {
    font-size: $osdMarkdownFontSizeXL;
    /* stylelint-disable-next-line number-max-precision */
    line-height: 1.428571em;
    font-weight: 300;
  }

  h3 {
    font-size: $osdMarkdownFontSizeL;
    line-height: 1.6em;
    font-weight: 600;
  }

  h4 {
    font-size: $osdMarkdownSize;
    line-height: 1.5em;
    font-weight: 600;
  }

  h5 {
    font-size: $osdMarkdownFontSize;
    /* stylelint-disable-next-line number-max-precision */
    line-height: 1.142857em;
    font-weight: 700;
  }

  h6 {
    font-size: $osdMarkdownFontSizeS;
    /* stylelint-disable-next-line number-max-precision */
    line-height: 1.333333em;
    font-weight: 700;
    text-transform: uppercase;
  }

  // 3. Images
  img {
    max-width: 100%;
    box-sizing: content-box;
    border-style: none;
  }

  // 4. Blockquotes
  blockquote {
    padding: 0 1em;
    border-left: $osdMarkdownSizeXXS solid $osdMarkdownAlphaLightShade;
  }

  &--reversed blockquote {
    border-left-color: $osdMarkdownAlphaLightShadeReversed;
  }

  // 5. Horizontal rules
  hr {
    overflow: hidden;
    background: transparent;
    height: 2px;
    padding: 0;
    margin: $osdMarkdownSizeL 0;
    background-color: $osdMarkdownAlphaLightShade;
    border: 0;
  }

  &--reversed hr {
    background-color: $osdMarkdownAlphaLightShadeReversed;
  }

  hr::before {
    display: table;
    content: "";
  }

  hr::after {
    display: table;
    clear: both;
    content: "";
  }

  // 6. Lists
  ul,
  ol {
    padding-left: 0;
    margin-top: 0;
    margin-bottom: $osdMarkdownSize;
  }

  ul {
    list-style-type: disc;
  }

  ol {
    list-style-type: decimal;
  }

  ul ul {
    list-style-type: circle;
  }

  ol ol,
  ul ol {
    list-style-type: lower-roman;
  }

  ul ul ol,
  ul ol ol,
  ol ul ol,
  ol ol ol {
    list-style-type: lower-alpha;
  }

  dd {
    margin-left: 0;
  }

  /* stylelint-disable-next-line no-duplicate-selectors */
  ul,
  ol {
    padding-left: $osdMarkdownSizeL;
  }

  ul ul,
  ul ol,
  ol ol,
  ol ul {
    margin-top: 0;
    margin-bottom: 0;
  }

  li > p {
    margin-bottom: $osdMarkdownSizeXS;
  }

  li + li {
    margin-top: $osdMarkdownSizeXXS;
  }

  // 7. Tables
  table {
    display: block;
    width: 100%;
    overflow: auto;
    border-left: 1px solid $osdMarkdownAlphaLightShade;
    border-spacing: 0;
    border-collapse: collapse;
  }

  &--reversed table {
    border-left-color: $osdMarkdownAlphaLightShadeReversed;
  }

  td,
  th {
    padding: 0;
  }

  table th,
  table td {
    padding: $osdMarkdownSizeXXS $osdMarkdownSizeS;
    border-top: 1px solid $osdMarkdownAlphaLightShade;
    border-bottom: 1px solid $osdMarkdownAlphaLightShade;

    &:last-child {
      border-right: 1px solid $osdMarkdownAlphaLightShade;
    }
  }

  &--reversed table th,
  &--reversed table td {
    border-color: $osdMarkdownAlphaLightShadeReversed;
  }

  table tr {
    background-color: transparent;
    border-top: 1px solid $osdMarkdownAlphaLightShade;
  }

  &--reversed table tr {
    border-top-color: $osdMarkdownAlphaLightShadeReversed;
  }

  // 8. Code blocks
  code,
  pre {
    margin-bottom: $osdMarkdownSizeXS;
    font-family: Monaco, Menlo, "Ubuntu Mono", Consolas, source-code-pro, monospace;
    font-size: $osdMarkdownFontSizeS;
  }

  code {
    padding: $osdMarkdownSizeXXS 0;
    margin: 0;
    background-color: $osdMarkdownAlphaLightestShade;
    border-radius: $osdMarkdownSizeXXS;
  }

  &--reversed code {
    background-color: $osdMarkdownAlphaLightestShadeReversed;
  }

  code::before,
  code::after {
    letter-spacing: -0.2em;
    content: "\00a0";
  }

  pre {
    padding: $osdMarkdownSize;
    overflow: auto;
    font-size: $osdMarkdownFontSizeS;
    /* stylelint-disable-next-line number-max-precision */
    line-height: 1.333333em;
    background-color: $osdMarkdownAlphaLightestShade;
    border-radius: $osdMarkdownSizeXXS;
    word-wrap: normal;
  }

  &--reversed pre {
    background-color: $osdMarkdownAlphaLightestShadeReversed;
  }

  pre code {
    display: inline;
    max-width: auto;
    padding: 0;
    overflow: visible;
    line-height: inherit;
    word-wrap: normal;
    white-space: pre;
    background-color: transparent;
    border: 0;
  }

  pre code::before,
  pre code::after {
    content: normal;
  }
}