Template:Fraction/styles.css

/* {{pp-template}} */
/**
 * Resulting [[Template:sfrac]] code with all 3 parameters provided, indentation added:
 *
 *    <span class="sfrac nowrap">
 *      <span class="int">{{{1}}}&#x2064;</span>
 *      <span class="plus visualhide">+</span>
 *      <span class="tion">
 *        <span class="num">{{{2}}}</span>
 *        <span class="slash visualhide">/</span>
 *        <span class="den">{{{3}}}</span>
 *      </span>
 *    </span>
 *
 *    .sfrac.nowrap
 *    > .int
 *    > .plus.visualhide
 *    > .tion
 *      > .num
 *      > .slash.visualhide
 *      > .den
 *
 * Resulting [[Template:sfrac]] code with just 1 or 2 parameters provided, indentation added:
 *
 *    <span class="sfrac nowrap" class="tion">
 *      <span class="num">{{{1|1}}}</span>
 *      <span class="visualhide slash">/</span>
 *      <span class="den">{{{2|{{{1}}}}}}</span>
 *    </span>
 *
 *    .sfrac.tion.nowrap
 *    > .num
 *    > .slash.visualhide
 *    > .den
 */

/**
 * Stacked Fractions
 * -----------------
 *
 * - default for [[Template:sfrac]]
 *   and for [[Template:frac]] inside [[Template:math]] or [[Template:bigmath]]
 * - opt-in with .stacked set on any ancestor or with the {{{class}}} parameter
 * - opt-out with .vulgar set on any ancestor or with the {{{class}}} parameter
 */

/** stacked container */
/* with integer */
.stacked .frac>.tion /* opt-in */,
 .stacked.frac>.tion,
.texhtml .frac>.tion /* context */,
.math    .frac>.tion,
        .sfrac>.tion /* default */,
/* without integer */
.stacked .frac.tion /* opt-in */,
 .stacked.frac.tion,
.texhtml .frac.tion /* context */,
.math    .frac.tion,
        .sfrac.tion /* default */
{
  display: inline-block;
  vertical-align: -0.6em; /* = -0.51 parent-em */
  font-size: 85%; /* should this be 83.3%? to make vertical alignment max. 0.5 parent-em */
  text-align: center;
}

/** stacked numerator */
.stacked .frac sup  /* opt-in */,
 .stacked.frac .num,
.stacked .frac sup,
 .stacked.frac .num,
.texhtml .frac sup  /* context */,
.texhtml .frac .num,
.math    .frac sup,
.math    .frac .num,
    span.sfrac .num /* default */,
/** stacked denominator */
.stacked .frac sub  /* opt-in */,
 .stacked.frac .den,
.stacked .frac sub,
 .stacked.frac .den,
.texhtml .frac sub  /* context */,
.texhtml .frac .den,
.math    .frac sub,
.math    .frac .den,
        .sfrac .den /* default */
{
  display: block;
  margin: 0 0.1em; /* should this be padding? */
  line-height: 1em;
}

/** reset default <sup> and <sub> styling */
.stacked .frac sup /* opt-in */,
 .stacked.frac sup,
.stacked .frac sub,
 .stacked.frac sub,
.texhtml .frac sup /* context */,
.texhtml .frac sub,
.math    .frac sup,
.math    .frac sub
{
  vertical-align: baseline; /* may be 'super' or 'sub', respectively */
  position: static; /* may be 'relative' */
  font-size: 1em; /* overrides 80% from selector '.mw-body-content sub/p' in [[MediaWiki:Common.css]],
                     inherits 85% of outer font size */
}

/** stacked fraction line above denominator */
.stacked .frac sub  /* opt-in */,
.stacked .frac .den,
.math    .frac sub  /* context */,
.texhtml .frac sub,
.texhtml .frac .den,
.math    .frac .den,
        .sfrac .den /* default */
{
  border-top: 1px solid;
}

/**
 * Vulgar Fractions
 * ----------------
 *
 * - default for [[Template:frac]]
 * - opt-in with .vulgar set on any ancestor or with the {{{class}}} parameter
 * - opt-out with .stacked set on any ancestor or with the {{{class}}} parameter
 */

/** unhide vulgar fraction slash */
.vulgar .sfrac .slash.visualhide /* opt-in */,
 .vulgar.sfrac .slash.visualhide,
         .frac .slash.visualhide /* default */
{
  /* reset everything that .visualhide from [[MediaWiki:Common.css]] does */
  position: static /* absolute */;
  left: 0 /* -10000px*/;
  top: 0 /* auto */;
  width: auto /* 1px */;
  height: auto /* 1px */;
  overflow: visible /* hidden */;
}

/** avoid line above denominator */
.vulgar .sfrac .den /* opt-in */,
 .vulgar.sfrac .den,
         .frac .den /* default */,
         .frac sub
{
  border-top: none;
}

.vulgar .sfrac>.tion /* opt-in, with integer */,
 .vulgar.sfrac>.tion,
.vulgar .sfrac.tion  /* opt-in, without integer */,
 .vulgar.sfrac.tion
{
  display: inline;
  vertical-align: baseline;
  font-size: 1em;
  text-align: inherit;
}

/**
 * Fancy vulgar fractions
 * ----------------------
 *
 * - always requires opt-in
 */

/** enable smart-font features */
.stacked .fancy .frac /* double opt-in */,
 .stacked.fancy .frac,
.stacked  .fancy.frac,
.fancy  .stacked.frac,
.fancy .stacked .frac,
  .fancy.stacked.frac,
        .fancy .sfrac /* opt-in */,
         .fancy.sfrac,
               .sfrac /* default */
{
  font-variant-numeric: stacked-fractions;
}
.vulgar .fancy .sfrac /* double opt-in */,
 .vulgar.fancy .sfrac,
.vulgar  .fancy.sfrac,
.fancy  .vulgar.sfrac,
.fancy .vulgar .sfrac,
  .fancy.vulgar.sfrac,
        .fancy  .frac /* opt-in */,
          .fancy.frac,
                .frac /* default */
{
  font-variant-numeric: diagonal-fractions;
}

/* remove stacking */
.fancy .sfrac>.tion[title] /* opt-in, with integer */,
 .fancy.sfrac>.tion[title],
.fancy .sfrac.tion[title]  /* opt-in, without integer */,
 .fancy.sfrac.tion[title]
{
  display: inline;
  vertical-align: baseline;
  font-size: 1em;
  text-align: inherit;
}
/* remove all children of .tion except integer */
.fancy .sfrac>.tion[title]>* /* opt-in, with integer */,
.fancy  .frac>.tion[title]>*,
 .fancy.sfrac>.tion[title]>*,
  .fancy.frac>.tion[title]>*,
.fancy .sfrac.tion[title]>*  /* opt-in, without integer */,
.fancy  .frac.tion[title]>*,
 .fancy.sfrac.tion[title]>*,
  .fancy.frac.tion[title]>*
{
  display: none;
}
/* insert fancy character(s) stored by the template in .tion[title] */
.fancy .sfrac>.tion[title]::before /* opt-in, with integer */,
.fancy  .frac>.tion[title]::before,
 .fancy.sfrac>.tion[title]::before,
  .fancy.frac>.tion[title]::before,
.fancy .sfrac.tion[title]::before  /* opt-in, without integer */,
.fancy  .frac.tion[title]::before,
 .fancy.sfrac.tion[title]::before,
  .fancy.frac.tion[title]::before
{
  content: attr(title);
}

/** invisible plus sign U+2064 */
/* remove normal plus sign or space */
.fancy .sfrac .plus  /* opt-in */,
.fancy  .frac .plus,
 .fancy.sfrac .plus,
  .fancy.frac .plus
{
  display: none;
}
/* insert invisible Unicode character */
.fancy .sfrac .int::after /* opt-in */,
.fancy  .frac .int::after,
 .fancy.sfrac .int::after,
  .fancy.frac .int::after
{
  content: "\2064";
}