/* https://w3c.github.io/mathml-core/#user-agent-stylesheet */
@namespace url(http://www.w3.org/1998/Math/MathML);

/* Universal rules */
* {
  font-size: math;
  display: block math;
  writing-mode: horizontal-tb !important;
}

/* The <math> element */
math {
  direction: ltr;
  text-indent: 0;
  letter-spacing: normal;
  line-height: normal;
  word-spacing: normal;
  font-family: math;
  font-size: inherit;
  font-style: normal;
  font-weight: normal;
  display: inline math;
  math-shift: normal;
  math-style: compact;
  math-depth: 0;
}
math[display="block" i] {
  display: block math;
  math-style: normal;
}
math[display="inline" i] {
  display: inline math;
  math-style: compact;
}

/* <mrow>-like elements */
semantics > :not(:first-child) {
  display: none;
}
maction > :not(:first-child) {
  display: none;
}
merror {
  border: 1px solid red;
  background-color: lightYellow;
}
mphantom {
  visibility: hidden;
}

/* Token elements */
mi {
  text-transform: math-auto;
}

/* Tables */
mtable {
  display: inline-table;
  math-style: compact;
}
mtr {
  display: table-row;
}
mtd {
  display: table-cell;
  /* Centering inside table cells should rely on box alignment properties.
     See https://github.com/w3c/mathml-core/issues/156 */
  text-align: center;
  padding: 0.5ex 0.4em;
}

/* Fractions */
mfrac {
  padding-inline-start: 1px;
  padding-inline-end: 1px;
}
mfrac > * {
  math-depth: auto-add;
  math-style: compact;
}
mfrac > :nth-child(2) {
  math-shift: compact;
}

/* Other rules for scriptlevel, displaystyle and math-shift */
mroot > :not(:first-child) {
  math-depth: add(2);
  math-style: compact;
}
mroot, msqrt {
  math-shift: compact;
}
msub > :not(:first-child),
msup > :not(:first-child),
msubsup > :not(:first-child),
mmultiscripts > :not(:first-child),
munder > :not(:first-child),
mover > :not(:first-child),
munderover > :not(:first-child) {
  math-depth: add(1);
  math-style: compact;
}
munder[accentunder="true" i] > :nth-child(2),
mover[accent="true" i] > :nth-child(2),
munderover[accentunder="true" i] > :nth-child(2),
munderover[accent="true" i] > :nth-child(3) {
  font-size: inherit;
}
msub > :nth-child(2),
msubsup > :nth-child(2),
mmultiscripts > :nth-child(even),
mmultiscripts > mprescripts ~ :nth-child(odd),
mover[accent="true" i] > :first-child,
munderover[accent="true" i] > :first-child {
  math-shift: compact;
}
mmultiscripts > mprescripts ~ :nth-child(even) {
  math-shift: inherit;
}