// The mu unit is defined as 1/18 em
@mu: 1.0/18.0em;

.katex-display {
    display: block;
    margin: 1em 0;
    text-align: center;

    > .katex {
        display: inline-block;
        text-align: initial;
    }
}

.katex {
    font: normal 1.5em KaTeX_Main, STIX, serif;
    line-height: 1.2;
    white-space: nowrap;

    // Protect elements inside .katex from inheriting text-indent.
    text-indent: 0;

    .katex-html {
        // Making .katex inline-block allows line breaks before and after,
        // which is undesireable ("to $x$,"). Instead, adjust the .katex-html
        // style and put nowrap on the inline .katex element.
        display: inline-block;
    }

    .katex-mathml {
        // Accessibility hack to only show to screen readers
        // Found at: http://a11yproject.com/posts/how-to-hide-content/
        position: absolute;
        clip: rect(1px, 1px, 1px, 1px);
        padding: 0;
        border: 0;
        height: 1px;
        width: 1px;
        overflow: hidden;
    }

    .base {
        display: inline-block;
    }

    .strut {
        display: inline-block;
    }

    .mathit {
        font-family: KaTeX_Math;
        font-style: italic;
    }

    .mathbf {
        font-family: KaTeX_Main;
        font-weight: bold;
    }

    .amsrm {
        font-family: KaTeX_AMS;
    }

    .mathbb {
        font-family: KaTeX_AMS;
    }

    .mathcal {
        font-family: KaTeX_Caligraphic;
    }

    .mathfrak {
        font-family: KaTeX_Fraktur;
    }

    .mathtt {
        font-family: KaTeX_Typewriter;
    }

    .mathscr {
        font-family: KaTeX_Script;
    }

    .mathsf {
        font-family: KaTeX_SansSerif;
    }

    .mainit {
        font-family: KaTeX_Main;
        font-style: italic;
    }

    // This value is also used in fontMetrics.js, if you change it make sure the
    // values match.
    @ptperem: 10.0;
    @nulldelimiterspace: 1.2em / @ptperem;

    @thinspace: 0.16667em;
    @mediumspace: 0.22222em;
    @thickspace: 0.27778em;

    .textstyle {
        > .mord {
            & + .mord {}
            & + .mop { margin-left: @thinspace; }
            & + .mbin { margin-left: @mediumspace; }
            & + .mrel { margin-left: @thickspace; }
            & + .mopen {}
            & + .mclose {}
            & + .mpunct {}
            & + .minner { margin-left: @thinspace; }
        }

        > .mop {
            & + .mord { margin-left: @thinspace; }
            & + .mop { margin-left: @thinspace; }
            & + .mbin {}
            & + .mrel { margin-left: @thickspace; }
            & + .mopen {}
            & + .mclose {}
            & + .mpunct {}
            & + .minner { margin-left: @thinspace; }
        }

        > .mbin {
            & + .mord { margin-left: @mediumspace; }
            & + .mop { margin-left: @mediumspace; }
            & + .mbin {}
            & + .mrel {}
            & + .mopen { margin-left: @mediumspace; }
            & + .mclose {}
            & + .mpunct {}
            & + .minner { margin-left: @mediumspace; }
        }

        > .mrel {
            & + .mord { margin-left: @thickspace; }
            & + .mop { margin-left: @thickspace; }
            & + .mbin {}
            & + .mrel {}
            & + .mopen { margin-left: @thickspace; }
            & + .mclose {}
            & + .mpunct {}
            & + .minner { margin-left: @thickspace; }
        }

        > .mopen {
            & + .mord {}
            & + .mop {}
            & + .mbin {}
            & + .mrel {}
            & + .mopen {}
            & + .mclose {}
            & + .mpunct {}
            & + .minner {}
        }

        > .mclose {
            & + .mord {}
            & + .mop { margin-left: @thinspace; }
            & + .mbin { margin-left: @mediumspace; }
            & + .mrel { margin-left: @thickspace; }
            & + .mopen {}
            & + .mclose {}
            & + .mpunct {}
            & + .minner { margin-left: @thinspace; }
        }

        > .mpunct {
            & + .mord { margin-left: @thinspace; }
            & + .mop { margin-left: @thinspace; }
            & + .mbin {}
            & + .mrel { margin-left: @thinspace; }
            & + .mopen { margin-left: @thinspace; }
            & + .mclose { margin-left: @thinspace; }
            & + .mpunct { margin-left: @thinspace; }
            & + .minner { margin-left: @thinspace; }
        }

        > .minner {
            & + .mord { margin-left: @thinspace; }
            & + .mop { margin-left: @thinspace; }
            & + .mbin { margin-left: @mediumspace; }
            & + .mrel { margin-left: @thickspace; }
            & + .mopen { margin-left: @thinspace; }
            & + .mclose {}
            & + .mpunct { margin-left: @thinspace; }
            & + .minner { margin-left: @thinspace; }
        }
    }

    .mord {
        & + .mop { margin-left: @thinspace; }
    }

    .mop {
        & + .mord { margin-left: @thinspace; }
        & + .mop { margin-left: @thinspace; }
    }

    .mclose {
        & + .mop { margin-left: @thinspace; }
    }

    .minner {
        & + .mop { margin-left: @thinspace; }
    }

    .reset-textstyle.textstyle { font-size: 1em; }
    .reset-textstyle.scriptstyle { font-size: 0.7em; }
    .reset-textstyle.scriptscriptstyle { font-size: 0.5em; }

    .reset-scriptstyle.textstyle { font-size: 1.42857em; }
    .reset-scriptstyle.scriptstyle { font-size: 1em; }
    .reset-scriptstyle.scriptscriptstyle { font-size: 0.71429em; }

    .reset-scriptscriptstyle.textstyle { font-size: 2em; }
    .reset-scriptscriptstyle.scriptstyle { font-size: 1.4em; }
    .reset-scriptscriptstyle.scriptscriptstyle { font-size: 1em; }

    .style-wrap {
        position: relative;
    }

    .vlist {
        display: inline-block;

        > span {
            display: block;
            height: 0;
            position: relative;

            > span {
                display: inline-block;
            }
        }

        .baseline-fix {
            display: inline-table;
            table-layout: fixed;
        }
    }

    .msupsub {
        text-align: left;
    }

    .mfrac {
        > span > span {
            text-align: center;
        }

       .frac-line {
            width: 100%;

            &:before {
                border-bottom-style: solid;
                border-bottom-width: 1px;
                content: "";
                display: block;
            }

            &:after {
                border-bottom-style: solid;
                border-bottom-width: 0.04em;
                content: "";
                display: block;
                margin-top: -1px;
            }
        }
    }

    .mspace {
        display: inline-block;

        &.negativethinspace {
            margin-left: -@thinspace;
        }

        &.thinspace {
            width: @thinspace;
        }

        &.mediumspace {
            width: @mediumspace;
        }

        &.thickspace {
            width: @thickspace;
        }

        &.enspace {
            width: 0.5em;
        }

        &.quad {
            width: 1em;
        }

        &.qquad {
            width: 2em;
        }
    }

    .llap,
    .rlap {
        width: 0;
        position: relative;

        > .inner {
            position: absolute;
        }

        > .fix {
            display: inline-block;
        }
    }

    .llap > .inner {
        right: 0;
    }

    .rlap > .inner {
        left: 0;
    }

    .katex-logo {
        .a {
            font-size: 0.75em;
            margin-left: -0.32em;
            position: relative;
            top: -0.2em;
        }
        .t {
            margin-left: -0.23em;
        }
        .e {
            margin-left: -0.1667em;
            position: relative;
            top: 0.2155em;
        }
        .x {
            margin-left: -0.125em;
        }
    }

    .rule {
        display: inline-block;
        border: solid 0;
        position: relative;
    }

    .overline .overline-line,
    .underline .underline-line {
        width: 100%;

        &:before {
            border-bottom-style: solid;
            border-bottom-width: 1px;
            content: "";
            display: block;
        }

        &:after {
            border-bottom-style: solid;
            border-bottom-width: 0.04em;
            content: "";
            display: block;
            margin-top: -1px;
        }
    }

    .sqrt {
        > .sqrt-sign {
            position: relative;
        }

        .sqrt-line {
            width: 100%;

            &:before {
                border-bottom-style: solid;
                border-bottom-width: 1px;
                content: "";
                display: block;
            }

            &:after {
                border-bottom-style: solid;
                border-bottom-width: 0.04em;
                content: "";
                display: block;
                margin-top: -1px;
            }
        }

        > .root {
            // These values are taken from the definition of `\r@@t`,
            // `\mkern 5mu` and `\mkern -10mu`.
            margin-left: 5*@mu;
            margin-right: -10*@mu;
        }
    }

    .sizing, .fontsize-ensurer {
        display: inline-block;

        @size1: 0.5;
        @size2: 0.7;
        @size3: 0.8;
        @size4: 0.9;
        @size5: 1.0;
        @size6: 1.2;
        @size7: 1.44;
        @size8: 1.73;
        @size9: 2.07;
        @size10: 2.49;

        .generate-size-change(@from, @to) {
            &.reset-size@{from}.size@{to} {
                @sizeFromVariable: ~"size@{from}";
                @sizeToVariable: ~"size@{to}";
                font-size: (@@sizeToVariable / @@sizeFromVariable) * 1em;
            }
        }

        .generate-to-size-change(@from, @currTo) when (@currTo =< 10) {
            .generate-size-change(@from, @currTo);

            .generate-to-size-change(@from, (@currTo + 1));
        }

        .generate-from-size-change(@currFrom) when (@currFrom =< 10) {
            .generate-to-size-change(@currFrom, 1);

            .generate-from-size-change((@currFrom + 1));
        }

        .generate-from-size-change(1);
    }

    .delimsizing {
        &.size1 { font-family: KaTeX_Size1; }
        &.size2 { font-family: KaTeX_Size2; }
        &.size3 { font-family: KaTeX_Size3; }
        &.size4 { font-family: KaTeX_Size4; }

        &.mult {
            .delim-size1 > span {
                font-family: KaTeX_Size1;
            }
            .delim-size4 > span {
                font-family: KaTeX_Size4;
            }
        }
    }

    .nulldelimiter {
        display: inline-block;
        width: @nulldelimiterspace;
    }

    .op-symbol {
        position: relative;

        &.small-op {
            font-family: KaTeX_Size1;
        }
        &.large-op {
            font-family: KaTeX_Size2;
        }
    }

    .op-limits {
        > .vlist > span {
            text-align: center;
        }
    }

    .accent {
        > .vlist > span {
            text-align: center;
        }

        .accent-body > span {
            width: 0;
        }

        .accent-body.accent-vec > span {
            position: relative;
            // This value is half of the value that the MathJax's makeFF shifts
            // it left. We center it by shifting it half way right again.
            left: 0.326em;
        }
    }

    .mtable {
        .vertical-separator {
            display: inline-block;
            margin: 0 -0.025em;
            border-right: 0.05em solid black;
        }

        .arraycolsep {
            display: inline-block;
        }

        .col-align-c > .vlist {
            text-align: center;
        }

        .col-align-l > .vlist {
            text-align: left;
        }

        .col-align-r > .vlist {
            text-align: right;
        }
    }

}
