@font-face{font-family:Nunito Variable;font-style:normal;font-display:swap;font-weight:200 1000;src:url(/assets/nunito-cyrillic-ext-wght-normal-D4X5GqEv.woff2)format("woff2-variations");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Nunito Variable;font-style:normal;font-display:swap;font-weight:200 1000;src:url(/assets/nunito-cyrillic-wght-normal-CY6AOgYE.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Nunito Variable;font-style:normal;font-display:swap;font-weight:200 1000;src:url(/assets/nunito-vietnamese-wght-normal-U01xdrZh.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Nunito Variable;font-style:normal;font-display:swap;font-weight:200 1000;src:url(/assets/nunito-latin-ext-wght-normal-CXYtwYOx.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Nunito Variable;font-style:normal;font-display:swap;font-weight:200 1000;src:url(/assets/nunito-latin-wght-normal-BzFMHfZw.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2)format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff)format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff)format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff)format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2)format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff)format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2)format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff)format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2)format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff)format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2)format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff)format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2)format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff)format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2)format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff)format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff)format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff)format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff)format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2)format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff)format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2)format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff)format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2)format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff)format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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)format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff)format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2)format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff)format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2)format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff)format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,math,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.19.1"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.katex-newline{display:block}.katex .katex-base{white-space:nowrap;width:min-content;position:relative}.katex .katex-base,.katex .katex-strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .katex-vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .katex-thinbox{flex-direction:row;width:0;max-width:0;display:inline-flex}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .katex-hdashline,.katex .katex-hline,.katex .katex-overline .overline-line,.katex .katex-rule,.katex .katex-underline .underline-line,.katex .mfrac .frac-line{min-height:1px}.katex .mspace{display:inline-block}.katex .katex-smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.katex-inner,.katex .llap>.katex-inner,.katex .rlap>.katex-inner{position:absolute}.katex .clap>.katex-fix,.katex .llap>.katex-fix,.katex .rlap>.katex-fix{display:inline-block}.katex .llap>.katex-inner{right:0}.katex .clap>.katex-inner,.katex .rlap>.katex-inner{left:0}.katex .clap>.katex-inner>span{margin-left:-50%;margin-right:50%}.katex .katex-rule{border:0 solid;display:inline-block;position:relative}.katex .katex-hline,.katex .katex-overline .overline-line,.katex .katex-underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .katex-hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.katex-root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .katex-sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .katex-sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .katex-sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .katex-sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .katex-sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .katex-sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .katex-sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .katex-sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .katex-sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .katex-sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .katex-sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .katex-sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .katex-sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .katex-sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .katex-sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .katex-sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .katex-sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .katex-sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .katex-sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .katex-sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .katex-sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .katex-sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .katex-sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .katex-sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .katex-sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .katex-sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .katex-sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .katex-sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .katex-sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .katex-sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .katex-sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .katex-sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .katex-sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .katex-sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .katex-sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .katex-sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .katex-sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .katex-sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .katex-sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .katex-sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .katex-sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .katex-sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .katex-sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .katex-sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .katex-sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .katex-sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .katex-sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .katex-sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .katex-sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .katex-sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .katex-sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .katex-sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .katex-sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .katex-sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .katex-sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .katex-sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .katex-sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .katex-sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .katex-sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .katex-sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .katex-sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .katex-sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .katex-sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .katex-sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .katex-sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .katex-sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .katex-sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .katex-sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .katex-sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .katex-sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .katex-sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .katex-sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .katex-sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .katex-sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .katex-sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .katex-sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .katex-sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .katex-sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .katex-sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .katex-sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .katex-sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .katex-sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .katex-sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .katex-sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .katex-sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .katex-sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .katex-sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .katex-sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .katex-sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .katex-sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .katex-sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .katex-sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .katex-sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .katex-sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .katex-sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .katex-sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .katex-sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .katex-sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .katex-sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .katex-sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .katex-sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .katex-sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .katex-sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .katex-sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .katex-sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .katex-sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .katex-sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .katex-sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .katex-sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .katex-sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .katex-sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .katex-sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .katex-sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .katex-sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .katex-sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .katex-sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .katex-sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .katex-sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .katex-sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .katex-sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .katex-sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{width:.12em;display:inline-block}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .katex-accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .katex-accent .accent-body{position:relative}.katex .katex-accent .accent-body:not(.accent-full){width:0}.katex .katex-overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .katex-stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .katex-stretchy:after,.katex .katex-stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .katex-sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .reflectbox{display:inline-block;transform:scaleX(-1)}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.katex-tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.katex-tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}:root{--font-ui:"Nunito Variable", system-ui, sans-serif;--font-code:ui-monospace, "Cascadia Code", Consolas, monospace;--text-display:900 32px/38px var(--font-ui);--text-title:900 24px/30px var(--font-ui);--text-body:700 17px/24px var(--font-ui);--text-small:700 14px/20px var(--font-ui);--text-label:900 13px/16px var(--font-ui);--label-tracking:.08em;--r-sm:10px;--r-md:16px;--r-lg:22px;--r-xl:28px;--r-pill:999px;--tap-min:44px;--gutter:16px;--accent:var(--analiza);--accent-deep:var(--analiza-deep);--accent-ink:var(--analiza-ink);--accent-tint:var(--analiza-tint);--shadow-btn:0 4px 0 var(--accent-deep);--shadow-node:0 6px 0 var(--accent-deep);--bg:#f6f7fb;--surface:#fff;--surface-2:#eceff5;--border:#dfe3ec;--ink:#16181f;--ink-2:#4a5163;--ink-3:#5f6678;--analiza:#1874c4;--analiza-deep:#0f5596;--analiza-ink:#1566ad;--analiza-tint:#e3effa;--algebra:#8a3ffc;--algebra-deep:#6420d0;--algebra-ink:#7a2fe8;--algebra-tint:#efe6ff;--prog:#c2410c;--prog-deep:#8f2f08;--prog-ink:#a8380a;--prog-tint:#fdeadf;--gold:#f2a900;--gold-deep:#c08400;--gold-ink:#5c3b00;--correct:#1a7f3c;--correct-deep:#115c2a;--correct-ink:#15692f;--correct-tint:#dcf3e2;--wrong:#c62828;--wrong-deep:#8e1b1b;--wrong-ink:#a51f1f;--wrong-tint:#fde3e3;--streak-ink:#c2410c;--streak-fill:#c2410c;--streak-tint:#fdeadf;--freeze-ink:#0b5f80;--freeze-tint:#dcf1fa;--xp-ink:#a16207;--xp-tint:#fff1c7;--locked:#e3e6ee;--locked-deep:#c9ceda;--locked-ink:#687085;--code-bg:#1e2230;--code-ink:#e6e9f2;--shadow-card:0 2px 0 var(--border);--shadow-sheet:0 -10px 30px #16181f24;--shadow-float:0 10px 28px #16181f24;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#11131a;--surface:#1b1e28;--surface-2:#272b37;--border:#333847;--ink:#f2f4f8;--ink-2:#b9bfcc;--ink-3:#9aa1b2;--analiza-deep:#0d4a82;--analiza-ink:#6cb0f0;--analiza-tint:#14273d;--algebra-deep:#5a1cc0;--algebra-ink:#b48cff;--algebra-tint:#261b3f;--prog-deep:#7f2906;--prog-ink:#fb8a55;--prog-tint:#3a1d10;--gold:#f2b51c;--gold-deep:#a87700;--gold-ink:#4a2f00;--correct-deep:#0e4d23;--correct-ink:#6fdc8f;--correct-tint:#12301d;--wrong-deep:#7a1616;--wrong-ink:#ff8a80;--wrong-tint:#3a1515;--streak-ink:#ff8a4c;--streak-tint:#3a1d10;--freeze-ink:#7fd3f5;--freeze-tint:#12303d;--xp-ink:#ffc93c;--xp-tint:#3a2e0c;--locked:#2a2e3a;--locked-deep:#1a1d25;--locked-ink:#8f96a8;--code-bg:#0c0e14;--shadow-card:0 2px 0 #0a0b10;--shadow-sheet:0 -10px 30px #00000080;--shadow-float:0 10px 28px #00000073}}[data-subject=analiza]{--accent:var(--analiza);--accent-deep:var(--analiza-deep);--accent-ink:var(--analiza-ink);--accent-tint:var(--analiza-tint)}[data-subject=algebra]{--accent:var(--algebra);--accent-deep:var(--algebra-deep);--accent-ink:var(--algebra-ink);--accent-tint:var(--algebra-tint)}[data-subject=c]{--accent:var(--prog);--accent-deep:var(--prog-deep);--accent-ink:var(--prog-ink);--accent-tint:var(--prog-tint)}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);font:700 17px/1.5 var(--font-ui);-webkit-tap-highlight-color:transparent;margin:0}#root{max-width:520px;min-height:100dvh;margin:0 auto}button{font:inherit;color:inherit;cursor:pointer}button:disabled{cursor:default}:focus-visible{outline:3px solid var(--accent-ink);outline-offset:2px}.sr{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}code{font-family:var(--font-code);font-size:.92em}:not(pre)>code{background:var(--surface-2);border-radius:6px;padding:1px 5px}pre{border-radius:var(--r-lg);background:var(--code-bg);color:var(--code-ink);font:500 14px/22px var(--font-code);white-space:pre;margin:8px 0;padding:14px;overflow-x:auto}.katex-display{overflow:auto hidden}.chunky{--sh:var(--border);box-shadow:0 4px 0 var(--sh);transition:transform 80ms,box-shadow 80ms}.chunky:not(:disabled):active{box-shadow:0 0 0 var(--sh);transform:translateY(4px)}@keyframes pop{40%{transform:scale(1.05)}}@keyframes pop-in{0%{opacity:0;transform:scale(0)}}@keyframes shake{20%,60%{transform:translate(-7px)}40%,80%{transform:translate(7px)}}@keyframes up{0%{transform:translateY(100%)}}@keyframes bob{50%{transform:translateY(-5px)}}@keyframes fall{to{transform:translateY(110dvh)rotate(800deg)}}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}.top{z-index:2;background:var(--surface);border-bottom:2px solid var(--border);justify-content:space-around;padding:10px 16px;font-size:18px;font-weight:900;display:flex;position:sticky;top:0}.top>:nth-child(2){color:var(--freeze-ink)}.top>:nth-child(3){color:var(--xp-ink)}.fire{filter:grayscale();color:var(--ink-3)}.fire.on{filter:none;color:var(--streak-ink)}main{padding:16px 16px 100px}.nav{padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:var(--surface);border-top:2px solid var(--border);justify-content:center;gap:12px;display:flex;position:fixed;bottom:0;left:0;right:0}.nav button{border-radius:var(--r-md);max-width:200px;min-height:56px;font:800 13px/16px var(--font-ui);color:var(--ink-3);background:0 0;border:2px solid #0000;flex-direction:column;flex:1;justify-content:center;align-items:center;gap:2px;padding:6px;display:flex}.nav button[aria-current]{border-color:var(--accent);background:var(--accent-tint);color:var(--accent-ink)}.chips{scrollbar-width:none;gap:8px;margin:0 -16px 16px;padding:4px 16px 8px;display:flex;overflow-x:auto}.chips::-webkit-scrollbar{display:none}.chips button{min-height:var(--tap-min);border:2px solid var(--border);border-radius:var(--r-pill);background:var(--surface);color:var(--ink-2);white-space:nowrap;flex:none;padding:8px 16px;font-weight:800}.chips button[aria-pressed=true]{--sh:var(--accent);border-color:var(--accent);background:var(--accent-tint);color:var(--accent-ink)}.unit{border-radius:var(--r-lg);background:var(--accent);color:#fff;box-shadow:0 4px 0 var(--accent-deep);margin:4px 0 64px;padding:16px 18px}.unit h2{margin:0;font-size:22px;font-weight:900;line-height:28px}.unit p{margin:4px 0 0;font-size:14px;line-height:20px}.path{flex-direction:column;align-items:center;gap:40px;margin-bottom:48px;display:flex}.node{background:0 0;border:0;flex-direction:column;align-items:center;gap:12px;padding:0;display:flex;position:relative}.node .dot{--sh:var(--accent-deep);color:#fff;background:var(--accent);width:70px;height:64px;box-shadow:0 6px 0 var(--sh);border-radius:50%;place-items:center;transition:transform 80ms,box-shadow 80ms;display:grid}.node:not(:disabled):active .dot{box-shadow:0 0 0 var(--sh);transform:translateY(6px)}.node.done .dot{--sh:var(--gold-deep);background:var(--gold);color:var(--gold-ink)}.node.locked .dot{--sh:var(--locked-deep);background:var(--locked);color:var(--locked-ink)}.node.current .dot{outline:6px solid var(--accent-tint);outline-offset:8px}.node>span:last-child{text-align:center;max-width:170px;font-size:15px;font-weight:800}.node.locked>span:last-child{color:var(--ink-3)}.bubble{z-index:1;border:2px solid var(--border);border-radius:var(--r-md);background:var(--surface);box-shadow:var(--shadow-float);color:var(--accent-ink);letter-spacing:var(--label-tracking);white-space:nowrap;padding:8px 14px;font-size:15px;font-weight:900;animation:1.4s ease-in-out infinite bob;position:absolute;top:-54px}.bubble:after{content:"";background:var(--surface);border:solid var(--border);border-width:0 2px 2px 0;width:12px;height:12px;position:absolute;bottom:-8px;left:50%;transform:translate(-50%)rotate(45deg)}.lesson{min-height:100dvh;padding:16px 16px 300px}.bar{align-items:center;gap:8px;margin-bottom:20px;display:flex}.bar button{width:var(--tap-min);height:var(--tap-min);border-radius:var(--r-pill);color:var(--ink-3);background:0 0;border:0;flex:none;place-items:center;margin-left:-8px;display:grid}.progress{border-radius:var(--r-pill);background:var(--surface-2);flex:1;height:16px;overflow:hidden}.progress div{border-radius:var(--r-pill);background:var(--accent);height:100%;transition:width .4s cubic-bezier(.3,1.5,.6,1);position:relative}.progress div:after{content:"";border-radius:var(--r-pill);background:#ffffff4d;height:3px;position:absolute;top:4px;left:8px;right:8px}.kind{font:var(--text-label);letter-spacing:var(--label-tracking);text-transform:uppercase;color:var(--accent-ink);margin-bottom:6px}.prompt{white-space:pre-wrap;margin-bottom:20px;font-size:22px;font-weight:900;line-height:1.35}.prompt .katex-display{border:2px solid var(--border);border-radius:var(--r-lg);background:var(--surface);margin:14px 0 0;padding:16px}.steps{border-bottom:2px dashed var(--border);margin-bottom:16px;padding-bottom:8px}.steps .prompt{margin-bottom:12px}.step-done{border:2px solid var(--border);border-radius:var(--r-lg);background:var(--surface);color:var(--ink-2);white-space:pre-wrap;margin-bottom:8px;padding:10px 14px;font-size:16px}.choices{gap:12px;display:grid}.choice{border:2px solid var(--border);border-radius:var(--r-lg);background:var(--surface);text-align:left;align-items:center;gap:12px;min-height:60px;padding:14px 16px;font-size:18px;display:flex}.choice .key{border:2px solid var(--border);width:28px;height:28px;color:var(--ink-3);border-radius:8px;flex:none;place-items:center;font-size:14px;font-weight:900;display:grid}.choice[aria-pressed=true]{--sh:var(--accent);border-color:var(--accent);background:var(--accent-tint);color:var(--accent-ink)}.choice[aria-pressed=true] .key{border-color:var(--accent);color:var(--accent-ink)}.choice.right{--sh:var(--correct);border-color:var(--correct);background:var(--correct-tint);color:var(--correct-ink);animation:.35s pop}.choice.wrong{--sh:var(--wrong);border-color:var(--wrong);background:var(--wrong-tint);color:var(--wrong-ink);animation:.4s shake}.choice.right .key,.choice.wrong .key{color:inherit;border-color:currentColor}.answer{border:2px solid var(--border);border-radius:var(--r-md);background:var(--surface);width:100%;color:var(--ink);font:700 22px var(--font-code);padding:16px}.answer:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-tint);outline:none}.answer:disabled{opacity:1;-webkit-text-fill-color:var(--ink)}.answer.good{border-color:var(--correct);background:var(--correct-tint);animation:.35s pop}.answer.bad{border-color:var(--wrong);background:var(--wrong-tint);animation:.4s shake}.hint{color:var(--ink-3);margin-top:10px;font-size:14px}.footer{padding:16px 16px calc(16px + env(safe-area-inset-bottom));background:var(--bg);border-top:2px solid var(--border);position:fixed;bottom:0;left:0;right:0}.footer>div{max-width:488px;margin:0 auto}.footer.ok,.footer.bad{border-radius:var(--r-xl) var(--r-xl) 0 0;box-shadow:var(--shadow-sheet);border-color:#0000;animation:.25s ease-out up}.footer.ok{background:var(--correct-tint)}.footer.bad{background:var(--wrong-tint)}.footer h3{margin:0 0 10px;font-size:26px;font-weight:900;line-height:32px}.ok h3{color:var(--correct-ink)}.bad h3{color:var(--wrong-ink)}.explain{max-height:42dvh;margin-bottom:14px;overflow:auto}.explain .label{font:var(--text-label);letter-spacing:var(--label-tracking);text-transform:uppercase;color:var(--wrong-ink)}.explain .correct{border-radius:var(--r-md);background:var(--surface);margin:6px 0 10px;padding:10px 14px;font-size:21px;font-weight:800}.explain .why{white-space:pre-wrap}.big{--sh:var(--accent-deep);border-radius:var(--r-md);background:var(--accent);color:#fff;letter-spacing:.06em;text-transform:uppercase;border:0;width:100%;min-height:54px;padding:15px;font-size:17px;font-weight:900}.big:disabled{--sh:transparent;background:var(--locked);color:var(--locked-ink)}.ok .big{--sh:var(--correct-deep);background:var(--correct)}.bad .big{--sh:var(--wrong-deep);background:var(--wrong)}.done{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:10px;min-height:100dvh;padding:24px;display:flex;position:relative;overflow:hidden}.done .emoji{font-size:100px;line-height:1.1;animation:.6s cubic-bezier(.3,1.6,.5,1) both pop-in}.done h1{font:var(--text-display);color:var(--xp-ink);margin:0}.pills{gap:10px;margin-top:10px;display:flex}.pill{border:3px solid var(--pc);border-radius:var(--r-lg);background:var(--pc);min-width:100px;animation:.5s cubic-bezier(.3,1.6,.5,1) both pop-in;overflow:hidden}.pill span{color:var(--pc-on);font:var(--text-label);letter-spacing:var(--label-tracking);text-transform:uppercase;padding:4px 8px 5px;display:block}.pill b{border-radius:calc(var(--r-lg) - 5px);background:var(--surface);color:var(--pc-ink);padding:12px 8px;font-size:22px;font-weight:900;display:block}.pill.xp{--pc:var(--gold);--pc-on:var(--gold-ink);--pc-ink:var(--xp-ink);animation-delay:.25s}.pill.time{--pc:var(--analiza);--pc-on:#fff;--pc-ink:var(--analiza-ink);animation-delay:.35s}.pill.acc{--pc:var(--correct);--pc-on:#fff;--pc-ink:var(--correct-ink);animation-delay:.45s}.streak-msg{border:2px solid var(--border);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);color:var(--ink-2);margin:8px 0 0;padding:12px 18px;font-size:18px}.streak-msg b{color:var(--streak-ink);font-weight:900}.done .big{max-width:340px;margin-top:24px}.confetti{pointer-events:none;position:absolute;inset:0}.confetti i{border-radius:3px;width:10px;height:16px;animation:1.8s ease-in forwards fall;position:absolute;top:-20px}.confetti i:nth-child(odd){width:14px;height:8px;animation-duration:2.3s}.stats{grid-template-columns:1fr 1fr;gap:10px;margin-bottom:20px;display:grid}.stat{border:2px solid var(--border);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);color:var(--ink-3);padding:12px 14px;font-size:14px}.stat b{color:var(--ink);font-size:24px;font-weight:900;display:block}.stat:first-child b{color:var(--streak-ink)}.stat:nth-child(2) b{color:var(--freeze-ink)}.stat:nth-child(3) b{color:var(--xp-ink)}.cal-head{justify-content:space-between;align-items:center;display:flex}.cal-head h2{text-transform:capitalize;margin:8px 0;font-size:20px;font-weight:900}.cal-head button{width:var(--tap-min);height:var(--tap-min);border:2px solid var(--border);background:var(--surface);color:var(--ink-2);border-radius:14px;font-size:20px;font-weight:900}.cal{border:2px solid var(--border);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);text-align:center;grid-template-columns:repeat(7,1fr);gap:4px;margin-top:8px;padding:12px;display:grid}.cal .wd{color:var(--ink-3);padding-bottom:4px;font-size:12px;font-weight:900}.cal .d{aspect-ratio:1;color:var(--ink-2);border-radius:12px;place-items:center;font-size:15px;font-weight:800;display:grid}.cal .study{background:var(--streak-fill);color:#fff}.cal .freeze{border:2px dashed var(--freeze-ink);background:var(--freeze-tint);color:var(--freeze-ink)}.cal .today{outline:3px solid var(--ink);outline-offset:2px}.legend{color:var(--ink-2);flex-wrap:wrap;align-items:center;gap:6px;margin-top:12px;font-size:14px;display:flex}.legend i{border-radius:4px;width:14px;height:14px;margin-left:8px;display:inline-block}.legend i.study{background:var(--streak-fill)}.legend i.freeze{border:2px dashed var(--freeze-ink);background:var(--freeze-tint)}.theory{border:2px solid var(--border);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-card);white-space:pre-wrap;padding:20px;font-size:18px;line-height:1.55;animation:.25s ease-out pop}.theory h2{font:var(--text-title);color:var(--accent-ink);white-space:normal;margin:0 0 12px}.footer .row{gap:10px;display:flex}.back{border:2px solid var(--border);border-radius:var(--r-md);background:var(--surface);width:64px;color:var(--ink-2);flex:none;font-size:32px;font-weight:900}.bar .progress+button{margin:0 -8px 0 0;font-size:22px}.top .lang{min-height:var(--tap-min);border-radius:var(--r-pill);letter-spacing:.04em;background:0 0;border:0;margin:-10px 0;padding:0 10px;font-size:15px}.top .lang b{color:var(--accent-ink)}.top .lang span{color:var(--ink-3);margin-left:6px;font-weight:700}.top .lang b+span,.top .lang span+b{margin-left:6px}