@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-cyrillic-ext-wght-normal.BOeWTOD4.woff2) format("woff2-variations");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-cyrillic-wght-normal.DqGufNeO.woff2) format("woff2-variations");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-greek-ext-wght-normal.DlzME5K_.woff2) format("woff2-variations");unicode-range:U+1F00-1FFF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-greek-wght-normal.CkhJZR-_.woff2) format("woff2-variations");unicode-range:U+0370-0377,U+037A-037F,U+0384-038A,U+038C,U+038E-03A1,U+03A3-03FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-vietnamese-wght-normal.CBcvBZtf.woff2) format("woff2-variations");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-latin-ext-wght-normal.DO1Apj_S.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,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:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/inter-latin-wght-normal.Dx4kXJAl.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Vazirmatn Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/vazirmatn-arabic-wght-normal.Cafbb7Zc.woff2) format("woff2-variations");unicode-range:U+0600-06FF,U+0750-077F,U+0870-088E,U+0890-0891,U+0897-08E1,U+08E3-08FF,U+200C-200E,U+2010-2011,U+204F,U+2E41,U+FB50-FDFF,U+FE70-FE74,U+FE76-FEFC,U+102E0-102FB,U+10E60-10E7E,U+10EC2-10EC4,U+10EFC-10EFF,U+1EE00-1EE03,U+1EE05-1EE1F,U+1EE21-1EE22,U+1EE24,U+1EE27,U+1EE29-1EE32,U+1EE34-1EE37,U+1EE39,U+1EE3B,U+1EE42,U+1EE47,U+1EE49,U+1EE4B,U+1EE4D-1EE4F,U+1EE51-1EE52,U+1EE54,U+1EE57,U+1EE59,U+1EE5B,U+1EE5D,U+1EE5F,U+1EE61-1EE62,U+1EE64,U+1EE67-1EE6A,U+1EE6C-1EE72,U+1EE74-1EE77,U+1EE79-1EE7C,U+1EE7E,U+1EE80-1EE89,U+1EE8B-1EE9B,U+1EEA1-1EEA3,U+1EEA5-1EEA9,U+1EEAB-1EEBB,U+1EEF0-1EEF1}@font-face{font-family:Vazirmatn Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/vazirmatn-latin-ext-wght-normal.tDTa1Fj6.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,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:Vazirmatn Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/vazirmatn-latin-wght-normal.BFexNX-K.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,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(/_astro/KaTeX_AMS-Regular.BQhdFMY1.woff2) format("woff2"),url(/_astro/KaTeX_AMS-Regular.DMm9YOAa.woff) format("woff"),url(/_astro/KaTeX_AMS-Regular.DRggAlZN.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/_astro/KaTeX_Caligraphic-Bold.Dq_IR9rO.woff2) format("woff2"),url(/_astro/KaTeX_Caligraphic-Bold.BEiXGLvX.woff) format("woff"),url(/_astro/KaTeX_Caligraphic-Bold.ATXxdsX0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Caligraphic-Regular.Di6jR-x-.woff2) format("woff2"),url(/_astro/KaTeX_Caligraphic-Regular.CTRA-rTL.woff) format("woff"),url(/_astro/KaTeX_Caligraphic-Regular.wX97UBjC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/_astro/KaTeX_Fraktur-Bold.CL6g_b3V.woff2) format("woff2"),url(/_astro/KaTeX_Fraktur-Bold.BsDP51OF.woff) format("woff"),url(/_astro/KaTeX_Fraktur-Bold.BdnERNNW.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Fraktur-Regular.CTYiF6lA.woff2) format("woff2"),url(/_astro/KaTeX_Fraktur-Regular.Dxdc4cR9.woff) format("woff"),url(/_astro/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(/_astro/KaTeX_Main-Bold.Cx986IdX.woff2) format("woff2"),url(/_astro/KaTeX_Main-Bold.Jm3AIy58.woff) format("woff"),url(/_astro/KaTeX_Main-Bold.waoOVXN0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/_astro/KaTeX_Main-BoldItalic.DxDJ3AOS.woff2) format("woff2"),url(/_astro/KaTeX_Main-BoldItalic.SpSLRI95.woff) format("woff"),url(/_astro/KaTeX_Main-BoldItalic.DzxPMmG6.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/_astro/KaTeX_Main-Italic.NWA7e6Wa.woff2) format("woff2"),url(/_astro/KaTeX_Main-Italic.BMLOBm91.woff) format("woff"),url(/_astro/KaTeX_Main-Italic.3WenGoN9.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Main-Regular.B22Nviop.woff2) format("woff2"),url(/_astro/KaTeX_Main-Regular.Dr94JaBh.woff) format("woff"),url(/_astro/KaTeX_Main-Regular.ypZvNtVU.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/_astro/KaTeX_Math-BoldItalic.CZnvNsCZ.woff2) format("woff2"),url(/_astro/KaTeX_Math-BoldItalic.iY-2wyZ7.woff) format("woff"),url(/_astro/KaTeX_Math-BoldItalic.B3XSjfu4.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/_astro/KaTeX_Math-Italic.t53AETM-.woff2) format("woff2"),url(/_astro/KaTeX_Math-Italic.DA0__PXp.woff) format("woff"),url(/_astro/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(/_astro/KaTeX_SansSerif-Bold.D1sUS0GD.woff2) format("woff2"),url(/_astro/KaTeX_SansSerif-Bold.DbIhKOiC.woff) format("woff"),url(/_astro/KaTeX_SansSerif-Bold.CFMepnvq.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/_astro/KaTeX_SansSerif-Italic.C3H0VqGB.woff2) format("woff2"),url(/_astro/KaTeX_SansSerif-Italic.DN2j7dab.woff) format("woff"),url(/_astro/KaTeX_SansSerif-Italic.YYjJ1zSn.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_SansSerif-Regular.DDBCnlJ7.woff2) format("woff2"),url(/_astro/KaTeX_SansSerif-Regular.CS6fqUqJ.woff) format("woff"),url(/_astro/KaTeX_SansSerif-Regular.BNo7hRIc.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Script-Regular.D3wIWfF6.woff2) format("woff2"),url(/_astro/KaTeX_Script-Regular.D5yQViql.woff) format("woff"),url(/_astro/KaTeX_Script-Regular.C5JkGWo-.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Size1-Regular.mCD8mA8B.woff2) format("woff2"),url(/_astro/KaTeX_Size1-Regular.C195tn64.woff) format("woff"),url(/_astro/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(/_astro/KaTeX_Size2-Regular.Dy4dx90m.woff2) format("woff2"),url(/_astro/KaTeX_Size2-Regular.oD1tc_U0.woff) format("woff"),url(/_astro/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(/_astro/KaTeX_Size3-Regular.CTq5MqoE.woff) format("woff"),url(/_astro/KaTeX_Size3-Regular.DgpXs0kz.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Size4-Regular.Dl5lxZxV.woff2) format("woff2"),url(/_astro/KaTeX_Size4-Regular.BF-4gkZK.woff) format("woff"),url(/_astro/KaTeX_Size4-Regular.DWFBv043.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/_astro/KaTeX_Typewriter-Regular.CO6r4hn1.woff2) format("woff2"),url(/_astro/KaTeX_Typewriter-Regular.C0xS9mPB.woff) format("woff"),url(/_astro/KaTeX_Typewriter-Regular.D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,math,Times New Roman,serif;line-height:1.2;position:relative;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.19.0"}.katex .katex-mathml{border:0;-webkit-clip-path:inset(50%);clip-path:inset(50%);height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.katex-newline{display:block}.katex .katex-base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.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;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .katex-vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .katex-thinbox{display:inline-flex;flex-direction:row;max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.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{display:inline;line-height:0}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.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;display:inline-block;width:100%}.katex .katex-hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.katex-root{margin-left:.2777777778em;margin-right:-.5555555556em}.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:.8333333333em}.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:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .katex-sizing.reset-size2.size4{font-size:1.3333333333em}.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:1.6666666667em}.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:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .katex-sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .katex-sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .katex-sizing.reset-size3.size2{font-size:.8571428571em}.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:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .katex-sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .katex-sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .katex-sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .katex-sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .katex-sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .katex-sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .katex-sizing.reset-size3.size11{font-size:3.5542857143em}.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:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .katex-sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .katex-sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .katex-sizing.reset-size5.size4{font-size:.8888888889em}.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:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .katex-sizing.reset-size5.size7{font-size:1.3333333333em}.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:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .katex-sizing.reset-size5.size11{font-size:2.7644444444em}.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:.4166666667em}.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:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .katex-sizing.reset-size7.size4{font-size:.6666666667em}.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:.8333333333em}.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:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .katex-sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .katex-sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .katex-sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .katex-sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .katex-sizing.reset-size8.size4{font-size:.5555555556em}.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:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .katex-sizing.reset-size8.size7{font-size:.8333333333em}.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:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .katex-sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .katex-sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .katex-sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .katex-sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .katex-sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .katex-sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .katex-sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .katex-sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .katex-sizing.reset-size9.size8{font-size:.8333333333em}.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:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .katex-sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .katex-sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .katex-sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .katex-sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .katex-sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .katex-sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .katex-sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .katex-sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .katex-sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .katex-sizing.reset-size10.size9{font-size:.8331726133em}.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:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .katex-sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .katex-sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .katex-sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .katex-sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .katex-sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .katex-sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .katex-sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .katex-sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .katex-sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .katex-sizing.reset-size11.size10{font-size:.8336012862em}.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{display:inline-block;width:.12em}.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{display:inline-block;min-width:1px}.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;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .katex-stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .katex-stretchy:after,.katex .katex-stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.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{border:.04em solid;box-sizing:border-box}.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{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;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{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.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{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}:root{--font-en: "Inter Variable", "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-ckb: "Vazirmatn Variable", "Vazirmatn", "Noto Sans Arabic", "Segoe UI", Tahoma, sans-serif;--font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, "Liberation Mono", monospace;--bg: #fbfaf7;--bg-elev: #ffffff;--bg-sunk: #f3f1ec;--bg-tint: #eef6f4;--ink: #1b1d20;--ink-2: #44484f;--ink-3: #6b7078;--line: #e2dfd8;--line-2: #d3cfc6;--accent: #0d6b62;--accent-ink: #0a5a52;--accent-soft: #dcefeb;--accent-2: #b4530f;--term: #0d6b62;--term-bg: #e3f2ef;--focus: #2563eb;--ok: #17733a;--ok-bg: #e6f4ea;--bad: #b42318;--bad-bg: #fdecea;--note: #2b5ea8;--note-bg: #eaf1fb;--tip: #0d6b62;--tip-bg: #e3f2ef;--warn: #9a5b00;--warn-bg: #fdf3e1;--imp: #7a3db8;--imp-bg: #f3ecfb;--corr: #b42318;--corr-bg: #fdeeed;--code-bg: #f6f8fa;--code-line: #e8ebef;--hl-line: #fff5c2;--shadow: 0 1px 2px rgb(20 20 20 / .05), 0 4px 16px rgb(20 20 20 / .06);--radius: 10px;--radius-sm: 6px;--header-h: 60px;--measure: 46rem;color-scheme:light}:root[data-theme=dark]{--bg: #121417;--bg-elev: #1a1d21;--bg-sunk: #0d0f11;--bg-tint: #13231f;--ink: #e7e6e3;--ink-2: #c3c3c0;--ink-3: #93959a;--line: #2b2f35;--line-2: #3a3f46;--accent: #4fc1b0;--accent-ink: #7dd8ca;--accent-soft: #173a35;--accent-2: #f0a35e;--term: #6fd3c3;--term-bg: #17332e;--focus: #7aa7ff;--ok: #6fcf8f;--ok-bg: #12301d;--bad: #ff8a80;--bad-bg: #3a1714;--note: #8db6f2;--note-bg: #162338;--tip: #6fd3c3;--tip-bg: #15302b;--warn: #f2be6b;--warn-bg: #33270f;--imp: #c9a2f2;--imp-bg: #2a1d3a;--corr: #ff8a80;--corr-bg: #3a1a17;--code-bg: #0d1117;--code-line: #20262e;--hl-line: #3a3417;--shadow: 0 1px 2px rgb(0 0 0 / .4), 0 6px 20px rgb(0 0 0 / .35);color-scheme:dark}html[data-lang=en] .l-ckb,html[data-lang=en] .u-ckb,html[data-lang=ckb] .l-en,html[data-lang=ckb] .u-en,html[data-lang=both] .u-ckb{display:none!important}html[data-lang=ckb] .fig-var-en,html:not([data-lang=ckb]) .fig-var-ckb,html[data-lang=ckb] svg .lang-en,html:not([data-lang=ckb]) svg .lang-ckb{display:none}html[data-lang=ckb] .fig-svg svg .lang-ckb{display:inline}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:calc(var(--header-h) + 16px)}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-en);font-size:1.0625rem;line-height:1.7;font-feature-settings:"cv11","ss01";text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}:lang(ckb){font-family:var(--font-ckb);line-height:1.95;font-feature-settings:normal}html[lang=ckb] body{font-family:var(--font-ckb)}code,pre,kbd,.ic{font-family:var(--font-mono)}img,svg{max-width:100%;height:auto}a{color:var(--accent-ink);text-decoration-thickness:1px;text-underline-offset:.18em}a:hover{text-decoration-thickness:2px}:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}::selection{background:var(--accent-soft)}h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em;font-weight:680;margin:0}h1:lang(ckb),h2:lang(ckb),h3:lang(ckb),h4:lang(ckb),:lang(ckb) h1,:lang(ckb) h2,:lang(ckb) h3{letter-spacing:0;line-height:1.6}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;inset-inline-start:12px;top:-60px;z-index:100;background:var(--ink);color:var(--bg);padding:8px 14px;border-radius:var(--radius-sm)}.skip-link:focus{top:10px}.btn{display:inline-flex;align-items:center;gap:.4em;font:inherit;font-size:.92rem;font-weight:600;padding:.45em .95em;border-radius:999px;border:1px solid var(--line-2);background:var(--bg-elev);color:var(--ink);cursor:pointer;text-decoration:none;line-height:1.4}.btn:hover{border-color:var(--accent);color:var(--accent-ink)}.btn--primary{background:var(--accent);border-color:var(--accent);color:#fff}:root[data-theme=dark] .btn--primary{color:#08201d}.btn--primary:hover{background:var(--accent-ink);color:#fff}.btn--ghost{background:transparent}.btn--small{font-size:.82rem;padding:.3em .75em}.site-header{position:sticky;top:0;z-index:40;height:var(--header-h);display:flex;align-items:center;gap:12px;padding-inline:16px;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:9px;color:var(--ink);text-decoration:none;font-weight:760;font-size:1.2rem;letter-spacing:-.02em;font-family:var(--font-en);flex-shrink:0}.brand-mark{width:30px;height:30px;flex-shrink:0}.brand-name b{color:var(--accent);font-weight:760}.header-search{flex:1 1 auto;max-width:460px;margin-inline:auto;position:relative}.header-actions{display:flex;align-items:center;gap:6px;flex-shrink:0}.icon-btn{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:10px;border:1px solid transparent;background:transparent;color:var(--ink-2);cursor:pointer;text-decoration:none}.icon-btn:hover{background:var(--bg-sunk);color:var(--ink)}.icon-btn svg{width:20px;height:20px}.menu-btn,.search-toggle{display:none}.lang-switch{display:inline-flex;padding:3px;border-radius:999px;background:var(--bg-sunk);border:1px solid var(--line)}.lang-switch button{font:inherit;font-size:.84rem;font-weight:600;border:0;background:transparent;color:var(--ink-2);padding:4px 11px;border-radius:999px;cursor:pointer;line-height:1.5}.lang-switch button[lang=ckb]{font-family:var(--font-ckb)}.lang-switch button[aria-pressed=true]{background:var(--bg-elev);color:var(--ink);box-shadow:var(--shadow)}.search-box{position:relative;display:flex;align-items:center}.search-box svg{position:absolute;inset-inline-start:12px;width:18px;height:18px;color:var(--ink-3);pointer-events:none}.search-box input{width:100%;font:inherit;font-size:.95rem;padding:8px 14px;padding-inline-start:38px;border-radius:999px;border:1px solid var(--line-2);background:var(--bg-elev);color:var(--ink)}[dir=rtl] .search-box input:placeholder-shown,[dir=rtl] input[data-ph-ckb]:placeholder-shown{direction:rtl;text-align:right}.search-box input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.search-box kbd{position:absolute;inset-inline-end:10px;font-size:.72rem;color:var(--ink-3);border:1px solid var(--line-2);border-radius:5px;padding:0 5px;background:var(--bg)}.search-pop{position:absolute;top:calc(100% + 8px);inset-inline:0;max-height:min(70vh,560px);overflow:auto;background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:6px;z-index:60}.sr-group{padding:6px 0}.sr-group+.sr-group{border-top:1px solid var(--line)}.sr-group-h{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-3);padding:4px 10px}.sr-item{display:block;padding:8px 10px;border-radius:8px;color:var(--ink);text-decoration:none}.sr-item:hover,.sr-item[aria-selected=true]{background:var(--bg-tint)}.sr-title{font-weight:620;display:flex;flex-wrap:wrap;gap:0 10px;align-items:baseline}.sr-title .sr-ckb{font-family:var(--font-ckb);font-weight:600;color:var(--ink-2)}.sr-sub{font-size:.85rem;color:var(--ink-3);display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.sr-kind{font-size:.7rem;font-weight:700;padding:1px 7px;border-radius:999px;background:var(--term-bg);color:var(--term)}.sr-empty{padding:14px;color:var(--ink-3);font-size:.92rem}.sr-all{display:block;text-align:center;padding:8px;font-size:.88rem;font-weight:600}mark{background:color-mix(in srgb,var(--accent-2) 22%,transparent);color:inherit;border-radius:3px;padding:0 1px}.page{max-width:1440px;margin-inline:auto}.wrap{max-width:1120px;margin-inline:auto;padding-inline:20px}.doc{display:grid;grid-template-columns:290px minmax(0,1fr) 230px;gap:0 40px;padding-inline:20px}.doc-main{min-width:0;padding-block:28px 80px;max-width:var(--measure);width:100%;justify-self:center}.doc-side{position:sticky;top:var(--header-h);align-self:start;height:calc(100vh - var(--header-h));height:calc(100dvh - var(--header-h));overflow:auto;padding-block:20px 40px;overscroll-behavior:contain;scrollbar-width:thin}.doc-toc{position:sticky;top:var(--header-h);align-self:start;max-height:calc(100vh - var(--header-h));overflow:auto;padding-block:28px 40px;font-size:.86rem;scrollbar-width:thin}.nav-tools{display:flex;gap:6px;margin-bottom:10px;flex-wrap:wrap}.nav-tree,.nav-tree ul{list-style:none;margin:0;padding:0}.nav-tree ul{padding-inline-start:12px;margin-inline-start:9px;border-inline-start:1px solid var(--line)}.nav-tree [hidden]{display:none}.nav-node{display:flex;align-items:flex-start;gap:4px;width:100%;font:inherit;font-size:.9rem;text-align:start;padding:5px 8px;border:0;border-radius:7px;background:transparent;color:var(--ink-2);cursor:pointer;line-height:1.45;text-decoration:none}.nav-node:hover{background:var(--bg-sunk);color:var(--ink)}.nav-node .chev{flex:0 0 auto;width:16px;height:16px;margin-top:3px;transition:transform .15s ease;color:var(--ink-3)}[dir=rtl] .nav-node .chev{transform:scaleX(-1)}.nav-node[aria-expanded=true] .chev{transform:rotate(90deg)}.nav-node--cat{font-weight:700;color:var(--ink);font-size:.8rem;text-transform:uppercase;letter-spacing:.05em}.nav-node--cat:lang(ckb),.nav-node--cat :lang(ckb){text-transform:none;letter-spacing:0;font-size:.9rem}.nav-node--course{font-weight:650;color:var(--ink)}.nav-node--chapter{font-weight:560}.nav-node--lecture{padding-inline-start:10px}.nav-node--lecture .num{color:var(--ink-3);font-variant-numeric:tabular-nums;min-width:1.6em;font-size:.8rem;margin-top:2px}.nav-node[aria-current=page]{background:var(--accent-soft);color:var(--accent-ink);font-weight:650}.nav-node[aria-current=page] .num{color:var(--accent-ink)}.nav-sections{margin-block:2px 6px}.nav-sections a{display:block;font-size:.82rem;padding:3px 8px;color:var(--ink-3);text-decoration:none;border-radius:6px}.nav-sections a:hover{color:var(--ink)}.nav-sections a.active{color:var(--accent-ink);font-weight:600}.nav-lbl{display:flex;flex-direction:column;min-width:0}html[data-lang=both] .nav-lbl .l-ckb{font-size:.85em;color:var(--ink-3)}.drawer-backdrop{display:none}.toc-h{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--ink-3);margin-bottom:8px}.toc ul{list-style:none;margin:0;padding:0;border-inline-start:1px solid var(--line)}.toc a{display:block;padding:3px 12px;margin-inline-start:-1px;border-inline-start:2px solid transparent;color:var(--ink-3);text-decoration:none;line-height:1.4}.toc a:hover{color:var(--ink)}.toc a.active{color:var(--accent-ink);border-inline-start-color:var(--accent);font-weight:600}.toc .d2 a{padding-inline-start:24px;font-size:.95em}.toc .d3 a{padding-inline-start:36px;font-size:.9em}html[data-lang=both] .toc .l-ckb{display:block;font-size:.92em;opacity:.85}.toc-mobile{display:none}.crumbs{display:flex;flex-wrap:wrap;gap:4px 8px;font-size:.85rem;color:var(--ink-3);margin-bottom:14px;padding:0;list-style:none}.crumbs a{color:var(--ink-3);text-decoration:none}.crumbs a:hover{color:var(--accent-ink);text-decoration:underline}.crumbs li+li:before{content:"›";margin-inline-end:8px;color:var(--line-2)}[dir=rtl] .crumbs li+li:before{content:"‹"}.lec-title{font-size:clamp(1.9rem,1.4rem + 2vw,2.6rem);font-weight:760;letter-spacing:-.025em}.lec-title .l-ckb{letter-spacing:0;font-weight:750}html[data-lang=both] .lec-title .l-ckb{display:block;font-size:.72em;margin-top:6px;color:var(--ink-2)}.lec-summary{margin-top:14px;font-size:1.13rem;color:var(--ink-2)}.lec-summary p{margin:0 0 6px}.lec-meta{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;margin-top:16px;font-size:.86rem;color:var(--ink-3)}.pill{display:inline-flex;align-items:center;gap:5px;padding:2px 10px;border-radius:999px;background:var(--bg-sunk);border:1px solid var(--line);font-weight:600;font-size:.8rem;color:var(--ink-2)}.pill--level{background:var(--accent-soft);border-color:transparent;color:var(--accent-ink)}.lec-intro-box{margin-top:22px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev);padding:4px 18px}.lec-intro-box>details{padding-block:10px}.lec-intro-box>details+details{border-top:1px solid var(--line)}.lec-intro-box summary{cursor:pointer;font-weight:650}.lec-intro-box ul{margin:8px 0 4px;padding-inline-start:1.3em}.draft-note{margin-top:16px;font-size:.86rem;color:var(--ink-3);border-inline-start:3px solid var(--accent-2);padding-inline-start:12px}.section-tools{display:flex;justify-content:flex-end;gap:6px;margin-top:26px;border-bottom:1px solid var(--line);padding-bottom:8px}.sec{margin-top:8px}.sec-d>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:10px;padding-block:18px 6px}.sec-d>summary::-webkit-details-marker{display:none}.sec-h{flex:1 1 auto;min-width:0}.sec--d1>.sec-d>summary .sec-h{font-size:1.55rem;padding-top:14px}.sec--d1+.sec--d1>.sec-d>summary{border-top:1px solid var(--line);margin-top:18px}.sec--d2>.sec-d>summary .sec-h{font-size:1.22rem}.sec--d3>.sec-d>summary .sec-h{font-size:1.06rem}html[data-lang=both] .sec-h .l-ckb{display:block;font-size:.82em;color:var(--ink-2);font-weight:650;margin-top:2px}.sec-chev{flex:0 0 auto;width:26px;height:26px;border-radius:7px;display:grid;place-items:center;color:var(--ink-3);transition:background .15s}.sec-chev:before{content:"";width:8px;height:8px;border-inline-end:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translate(-2px,-2px);transition:transform .18s ease}.sec-d:not([open])>summary .sec-chev:before{transform:rotate(-45deg)}[dir=rtl] .sec-d:not([open])>summary .sec-chev:before{transform:rotate(135deg)}.sec-d>summary:hover .sec-chev{background:var(--bg-sunk);color:var(--ink)}.sec-d>summary:hover .sec-h{color:var(--accent-ink)}.sec-body>.sec{margin-inline-start:0}.sec:target>.sec-d>summary .sec-h,.sec-d:target>summary .sec-h{color:var(--accent-ink)}.b{margin-block:1rem}.b-p p{margin:0}html[data-lang=both] .b .l-ckb,html[data-lang=both] .b-p .l-ckb{margin-top:.45rem}html[data-lang=both] .b-p p.l-ckb,html[data-lang=both] .b-list>.l-ckb,html[data-lang=both] .callout-body>p.l-ckb,html[data-lang=both] .analogy>p.l-ckb,html[data-lang=both] .step>p.l-ckb,html[data-lang=both] .exercise>p.l-ckb{border-inline-start:3px solid var(--accent-soft);padding-inline-start:12px;color:var(--ink-2)}.minor-h{font-size:1.08rem;margin-top:1.4rem}h4.minor-h{font-size:1rem}.b-list ul,.b-list ol{margin:0;padding-inline-start:1.4em}.b-list li{margin-block:.25em}.b-list li>ul,.b-list li>ol{margin-top:.25em}.b-list li::marker{color:var(--accent)}.ic{font-size:.86em;padding:.1em .38em;border-radius:5px;background:var(--bg-sunk);border:1px solid var(--line);white-space:break-spaces;word-break:break-word;unicode-bidi:isolate;direction:ltr}.term{font:inherit;color:inherit;background:none;border:0;padding:0 1px;margin:0;cursor:pointer;text-decoration:underline dotted var(--term);text-decoration-thickness:2px;text-underline-offset:.25em;border-radius:3px;line-height:inherit;text-align:inherit}.term:hover{background:var(--term-bg);color:var(--ink)}.term--no-ckb{text-decoration-style:dashed;text-decoration-color:var(--accent-2)}.term--static{text-decoration:none;cursor:inherit}.term--static:hover{background:none}.term--unknown{text-decoration:wavy underline var(--bad)}.gloss{font-family:var(--font-en);font-size:.8em;color:var(--ink-3);white-space:nowrap}.broken-link{text-decoration:wavy underline var(--bad)}.code{margin-inline:0;border:1px solid var(--line);border-radius:var(--radius);background:var(--code-bg);overflow:hidden;direction:ltr}.code-head{display:flex;align-items:center;flex-wrap:wrap;gap:6px 10px;padding:7px 10px 7px 14px;border-bottom:1px solid var(--code-line);font-size:.8rem;color:var(--ink-3);background:color-mix(in srgb,var(--code-bg) 80%,var(--bg-sunk))}[dir=rtl] .code-head{direction:rtl;padding:7px 14px 7px 10px}.code-title{color:var(--ink);font-weight:650;font-size:.86rem}.code-file{font-family:var(--font-mono);color:var(--ink-2)}.code-lang{font-family:var(--font-mono);font-size:.72rem;font-weight:700;letter-spacing:.04em}.code-runs{font-size:.74rem;font-weight:650;padding:1px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent-ink)}.code-runs--browser{background:var(--note-bg);color:var(--note)}.code-runs--database{background:var(--imp-bg);color:var(--imp)}.copy-btn{margin-inline-start:auto;font:inherit;font-size:.76rem;font-weight:600;padding:2px 10px;border-radius:6px;border:1px solid var(--line-2);background:var(--bg-elev);color:var(--ink-2);cursor:pointer}.copy-btn:hover{color:var(--ink);border-color:var(--accent)}.copy-btn.copied{color:var(--ok);border-color:var(--ok)}.code-body pre,.out-html pre,.term-dialog pre{margin:0;padding:14px 16px;overflow-x:auto;font-size:.86rem;line-height:1.65;tab-size:4;direction:ltr;text-align:left}.shiki{background-color:#1e2229!important;color:#e1e4e8}.code--numbered .code-body code{counter-reset:ln}.code--numbered .code-body .line:before{counter-increment:ln;content:counter(ln);display:inline-block;width:2.2em;margin-inline-end:1.1em;text-align:right;color:var(--ink-3);opacity:.6;user-select:none}.code-body .line.hl{background:var(--hl-line)!important;display:inline-block;width:calc(100% + 32px);margin-inline:-16px;padding-inline:16px}.code-notes{border-top:1px solid var(--code-line);background:var(--bg-elev);padding:8px 16px 10px;font-size:.93rem}[dir=rtl] .code-notes,[dir=rtl] .out{direction:rtl}.code-notes summary{cursor:pointer;font-weight:650;font-size:.82rem;color:var(--ink-3)}.code-notes dl{margin:6px 0 0}.cn{display:grid;grid-template-columns:5.5em 1fr;gap:2px 12px;padding-block:5px;border-top:1px dashed var(--line)}.cn:first-child{border-top:0}.cn dt{font-size:.8rem;font-weight:700;color:var(--accent-ink);padding-top:.3em}.cn dd,.cn dd p{margin:0}.out{border-top:1px solid var(--code-line);background:var(--bg-elev)}.b>.out{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.out-head{display:flex;align-items:center;gap:8px;font-size:.78rem;font-weight:700;color:var(--ink-3);padding:7px 14px 0;text-transform:uppercase;letter-spacing:.05em}.out-head :lang(ckb){text-transform:none;letter-spacing:0}.out-dot{width:8px;height:8px;border-radius:50%;background:var(--ok)}.out-text{margin:0;padding:8px 16px 14px;font-size:.88rem;line-height:1.6;white-space:pre-wrap;word-break:break-word;direction:ltr;text-align:left}.out-preview{display:block;width:calc(100% - 28px);margin:8px 14px 14px;min-height:60px;border:1px solid var(--line);border-radius:8px;background:#fff}.out-html{border-top:1px dashed var(--line)}.out-html summary{cursor:pointer;padding:6px 14px;font-size:.82rem;font-weight:650;color:var(--ink-3)}.out-note{padding:0 16px 12px;font-size:.92rem;color:var(--ink-2)}.out-note p{margin:0}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev)}.b-table table{border-collapse:collapse;width:100%;font-size:.94rem}.b-table caption{caption-side:top;text-align:start;padding:10px 14px;font-weight:650;border-bottom:1px solid var(--line)}.b-table th,.b-table td{padding:8px 14px;text-align:start;vertical-align:top;border-bottom:1px solid var(--line)}.b-table thead th{background:var(--bg-sunk);font-size:.86rem;font-weight:700}.b-table tbody tr:last-child td{border-bottom:0}html[data-lang=both] .b-table .cell.l-ckb{display:block;color:var(--ink-2);margin-top:3px}.callout{--c: var(--note);--c-bg: var(--note-bg);border-radius:var(--radius);background:var(--c-bg);border-inline-start:4px solid var(--c);padding:12px 16px}.callout--tip{--c: var(--tip);--c-bg: var(--tip-bg)}.callout--warning{--c: var(--warn);--c-bg: var(--warn-bg)}.callout--important,.callout--exam{--c: var(--imp);--c-bg: var(--imp-bg)}.callout--correction{--c: var(--corr);--c-bg: var(--corr-bg)}.callout--extra,.callout--source{--c: var(--ink-3);--c-bg: var(--bg-sunk)}.callout-title{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--c);font-size:.92rem;margin-bottom:4px}.callout-icon{display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--c);color:var(--bg-elev);font-size:.72rem;font-weight:800}.callout-body>:first-child{margin-top:0}.callout-body>:last-child{margin-bottom:0}.callout-body p{margin:0}.callout .b{margin-block:.7rem}.def{border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;background:var(--bg-elev);box-shadow:var(--shadow)}.def-label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--ink-3)}.def-label :lang(ckb){text-transform:none;letter-spacing:0}.def-names{font-size:1.25rem;font-weight:700;display:inline-flex;flex-wrap:wrap;gap:0 10px;margin:2px 0 6px;text-decoration:none}.def-names dfn{font-style:normal}.def-sep{color:var(--ink-3)}.def p{margin:0}.def .def-extra{margin-top:8px}.analogy{border-radius:var(--radius);background:linear-gradient(135deg,var(--bg-tint),transparent 70%),var(--bg-elev);border:1px solid var(--line);padding:14px 18px}.analogy-h{display:flex;gap:8px;align-items:center;font-weight:700;color:var(--accent-ink);font-size:.92rem;margin-bottom:4px}.analogy p{margin:0}.analogy-limits{margin-top:10px;padding-top:8px;border-top:1px dashed var(--line-2);font-size:.93rem;color:var(--ink-2)}.analogy-limits-h{font-weight:650;font-size:.82rem;color:var(--ink-3)}.steps ol{list-style:none;counter-reset:step;padding:0;margin:0}.steps-title{font-weight:700;margin-bottom:8px}.step{counter-increment:step;position:relative;padding-inline-start:46px;padding-bottom:14px;margin:0}.step:before{content:counter(step);position:absolute;inset-inline-start:0;top:0;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--accent);color:#fff;font-weight:700;font-size:.86rem;font-family:var(--font-en)}:root[data-theme=dark] .step:before{color:#08201d}.step:after{content:"";position:absolute;inset-inline-start:14px;top:34px;bottom:2px;width:2px;background:var(--line)}.step:last-child:after{display:none}.step p{margin:0}.step-title{font-weight:680;padding-top:2px}.fig{margin-inline:0;text-align:center}.fig--wide{margin-inline:clamp(-80px,-6vw,0px)}.fig--small .fig-svg,.fig--small .fig-zoom{max-width:420px}.fig-svg{margin-inline:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev);padding:10px}.fig-svg svg{display:block;width:100%;height:auto;margin-inline:auto;direction:ltr}.fig-svg svg .lang-ckb{direction:rtl}.fig-zoom{display:block;position:relative;margin-inline:auto;padding:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;cursor:zoom-in;background:var(--bg-sunk)}.fig-zoom img{display:block;width:100%;height:auto}.zoom-hint{position:absolute;inset-inline-end:8px;bottom:8px;width:30px;height:30px;border-radius:8px;display:grid;place-items:center;background:#0000008c;color:#fff;font-size:1rem;opacity:0;transition:opacity .15s}.fig-zoom:hover .zoom-hint,.fig-zoom:focus-visible .zoom-hint{opacity:1}.fig figcaption{margin-top:8px;font-size:.88rem;color:var(--ink-3);text-align:center}.fig figcaption .cap{display:block}.fig-credit{display:block;font-size:.76rem;margin-top:2px;opacity:.85}.fig-missing{padding:20px;border:2px dashed var(--bad);color:var(--bad)}.exercise{border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;background:var(--bg-elev)}.ex-head{display:flex;align-items:center;flex-wrap:wrap;gap:8px 10px;font-weight:700;margin-bottom:6px}.ex-badge,.quiz-badge{font-size:.72rem;font-weight:750;padding:2px 9px;border-radius:999px;background:var(--accent-2);color:#fff}.exercise>p{margin:0}.ex-hint,.ex-answer{margin-top:10px;border-top:1px dashed var(--line);padding-top:8px}.ex-hint summary,.ex-answer summary{cursor:pointer;font-weight:650;color:var(--accent-ink);font-size:.92rem}.ex-answer-body>.b:first-child{margin-top:.6rem}.quiz fieldset{border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;background:var(--bg-elev);margin:0}.quiz legend{float:inline-start;width:100%;padding:0;margin-bottom:8px;font-weight:650}.quiz legend .quiz-badge{margin-inline-end:8px}html[data-lang=both] .quiz-q.l-ckb{display:block;margin-top:4px;color:var(--ink-2)}.quiz-opt{clear:both;display:flex;gap:10px;align-items:flex-start;padding:7px 10px;border-radius:8px;border:1px solid var(--line);margin-block:6px;cursor:pointer}.quiz-opt:hover{border-color:var(--accent)}.quiz-opt input{margin-top:.45em;accent-color:var(--accent)}html[data-lang=both] .quiz-opt .l-ckb{display:block;color:var(--ink-2)}.quiz-opt.is-correct{border-color:var(--ok);background:var(--ok-bg)}.quiz-opt.is-wrong{border-color:var(--bad);background:var(--bad-bg)}.quiz-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:10px}.quiz-feedback{margin:0;font-weight:650}.quiz-feedback.ok{color:var(--ok)}.quiz-feedback.bad{color:var(--bad)}.quiz-expl{margin-top:10px;font-size:.95rem;color:var(--ink-2)}.quiz-expl p{margin:0}.qa{border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev);overflow:hidden}.qa-title{font-weight:700;padding:10px 16px;background:var(--bg-sunk);border-bottom:1px solid var(--line)}.qa-item{border-bottom:1px solid var(--line)}.qa-item:last-child{border-bottom:0}.qa-item>summary{cursor:pointer;padding:10px 16px;font-weight:600}html[data-lang=both] .qa-item>summary .l-ckb{display:block;font-weight:550;color:var(--ink-2)}.qa-a{padding:0 16px 12px}.qa-a>p{margin:0}.term-chips{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px}.chip{display:inline-flex;gap:8px;align-items:baseline;padding:4px 12px;border-radius:999px;border:1px solid var(--line-2);background:var(--bg-elev);text-decoration:none;font-size:.92rem}.chip:hover{border-color:var(--term)}.chip-ckb{font-family:var(--font-ckb);color:var(--ink-2)}html[data-lang=en] .chip-ckb{display:none}.lec-end{margin-top:48px;display:grid;gap:22px}.end-h{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--ink-3);margin-bottom:8px}.end-h :lang(ckb){text-transform:none;letter-spacing:0}.card-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px;list-style:none;padding:0;margin:0}.mini-card{display:block;height:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev);text-decoration:none;color:var(--ink)}.mini-card:hover{border-color:var(--accent)}.mini-card .l-ckb{display:block}html[data-lang=both] .mini-card .l-ckb{font-size:.9em;color:var(--ink-2)}.refs{margin:0;padding-inline-start:1.2em;font-size:.93rem}.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:30px}.pn{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;color:var(--ink);background:var(--bg-elev)}.pn:hover{border-color:var(--accent)}.pn small{display:block;color:var(--ink-3);font-size:.8rem;font-weight:600}.pn--next{text-align:end;grid-column:2}.pn .l-ckb{display:block}html[data-lang=both] .pn .l-ckb{font-size:.9em;color:var(--ink-2)}.term-dialog,.img-dialog{border:1px solid var(--line);border-radius:16px;padding:0;background:var(--bg-elev);color:var(--ink);box-shadow:0 20px 60px #00000040;width:min(560px,calc(100vw - 24px));max-height:min(85vh,720px)}.term-dialog::backdrop,.img-dialog::backdrop{background:#0f121673;backdrop-filter:blur(2px)}.td-inner{padding:20px 22px 22px;overflow:auto;max-height:min(85vh,720px)}.td-head{display:flex;align-items:flex-start;gap:12px}.td-names{flex:1 1 auto}.td-en{font-size:1.45rem;font-weight:760;line-height:1.25}.td-ckb{font-family:var(--font-ckb);font-size:1.35rem;font-weight:700;color:var(--accent-ink);line-height:1.6}.td-ckb.missing{font-size:.95rem;font-weight:600;color:var(--accent-2)}.td-status{display:inline-flex;margin-top:6px;font-size:.76rem;font-weight:650;padding:2px 9px;border-radius:999px;background:var(--bg-sunk);color:var(--ink-2);border:1px solid var(--line)}.td-status[data-st=proposed],.td-status[data-st=in-use]{background:var(--warn-bg);color:var(--warn);border-color:transparent}.td-status[data-st=missing]{background:var(--corr-bg);color:var(--corr);border-color:transparent}.td-status[data-st=reviewed],.td-status[data-st=established]{background:var(--ok-bg);color:var(--ok);border-color:transparent}.td-section{margin-top:16px}.td-section h3{font-size:.74rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--ink-3);margin-bottom:4px}.td-section h3:lang(ckb){text-transform:none;letter-spacing:0}.td-section p{margin:0 0 4px}.td-def-ckb{border-inline-start:3px solid var(--accent-soft);padding-inline-start:10px}.td-code{border:1px solid var(--line);border-radius:8px;background:var(--code-bg);margin-top:6px;overflow:hidden}.td-links{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}.td-lec{list-style:none;padding:0;margin:0}.td-lec a{display:block;padding:3px 0}.td-foot{margin-top:18px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.td-close{flex-shrink:0}.img-dialog{width:min(1400px,calc(100vw - 24px));max-height:calc(100vh - 24px);background:var(--bg-sunk)}.img-dialog img{display:block;max-width:100%;max-height:calc(100vh - 90px);margin:0 auto;object-fit:contain}.img-dialog .td-foot{margin:0;padding:8px 12px;justify-content:flex-end}.hero{padding-block:clamp(36px,7vw,84px) 30px;text-align:center}.hero-mark{width:64px;height:64px;margin-bottom:14px}.hero h1{font-size:clamp(2.2rem,1.6rem + 3vw,3.4rem);font-weight:780;letter-spacing:-.035em}.hero h1 b{color:var(--accent)}.hero-tag{font-size:clamp(1.08rem,1rem + .5vw,1.3rem);color:var(--ink-2);max-width:40rem;margin:12px auto 0}.hero-tag .l-ckb{display:block}html[data-lang=both] .hero-tag .l-ckb{margin-top:4px}.hero-search{max-width:600px;margin:28px auto 0}.hero-search .search-box input{font-size:1.05rem;padding:14px 18px;padding-inline-start:46px;box-shadow:var(--shadow)}.hero-search .search-box svg{inset-inline-start:16px;width:20px;height:20px}.hero-hint{font-size:.88rem;color:var(--ink-3);margin-top:10px}.free-badge{display:inline-flex;align-items:center;gap:8px;margin-top:18px;padding:6px 14px;border-radius:999px;background:var(--accent-soft);color:var(--accent-ink);font-weight:650;font-size:.88rem}.home-section{padding-block:28px}.home-h{font-size:1.35rem;margin-bottom:14px}html[data-lang=both] .home-h .l-ckb,html[data-lang=both] .page-title .l-ckb{display:block;font-size:.75em;color:var(--ink-2);font-weight:650;margin-top:2px}.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;list-style:none;margin:0;padding:0}.card{display:flex;flex-direction:column;gap:6px;height:100%;padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:var(--bg-elev);color:var(--ink);text-decoration:none;transition:border-color .15s,transform .15s}.card:hover{border-color:var(--accent);transform:translateY(-1px)}.card-kicker{font-size:.76rem;font-weight:700;color:var(--accent-ink);text-transform:uppercase;letter-spacing:.06em}.card-kicker:lang(ckb),.card-kicker :lang(ckb){text-transform:none;letter-spacing:0}.card-title{font-size:1.12rem;font-weight:700;line-height:1.35}html[data-lang=both] .card-title .l-ckb{display:block;font-size:.9em;color:var(--ink-2)}.card-text{font-size:.93rem;color:var(--ink-2)}.card-text p{margin:0}.card-meta{margin-top:auto;font-size:.82rem;color:var(--ink-3);padding-top:6px}.feature-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}.feature{padding:16px 18px;border-radius:14px;background:var(--bg-sunk)}.feature h3{font-size:1rem;margin-bottom:4px}.feature p{margin:0;font-size:.93rem;color:var(--ink-2)}.page-head{padding-block:34px 10px}.page-title{font-size:clamp(1.8rem,1.4rem + 1.6vw,2.4rem);font-weight:760;letter-spacing:-.02em}.page-lead{color:var(--ink-2);font-size:1.08rem;max-width:44rem;margin-top:10px}.page-lead p{margin:0 0 6px}.chapter-list{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:12px}.chapter{border:1px solid var(--line);border-radius:14px;background:var(--bg-elev);overflow:hidden}.chapter>summary{cursor:pointer;list-style:none;display:flex;gap:14px;align-items:center;padding:14px 18px}.chapter>summary::-webkit-details-marker{display:none}.chapter-num{flex:0 0 auto;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent-ink);font-weight:750;font-family:var(--font-en)}.chapter-title{flex:1;font-weight:700;font-size:1.08rem}html[data-lang=both] .chapter-title .l-ckb{display:block;font-size:.88em;color:var(--ink-2);font-weight:620}.chapter-count{font-size:.82rem;color:var(--ink-3);white-space:nowrap}.chapter ol{list-style:none;margin:0;padding:0 18px 12px;border-top:1px solid var(--line)}.chapter li a{display:flex;gap:12px;padding:9px 4px;border-bottom:1px dashed var(--line);text-decoration:none;color:var(--ink)}.chapter li:last-child a{border-bottom:0}.chapter li a:hover .lec-name{color:var(--accent-ink)}.lec-idx{color:var(--ink-3);font-variant-numeric:tabular-nums;min-width:2.2em;font-family:var(--font-en);padding-top:1px}.lec-name{font-weight:600}.lec-name .l-ckb{display:block}html[data-lang=both] .lec-name .l-ckb{font-weight:550;color:var(--ink-2);font-size:.93em}.lec-desc{display:block;font-size:.88rem;color:var(--ink-3);font-weight:400}.gl-tools{position:sticky;top:var(--header-h);z-index:5;padding-block:12px;background:var(--bg);display:flex;flex-wrap:wrap;gap:10px;align-items:center}.gl-tools input{flex:1 1 260px;font:inherit;padding:9px 14px;border-radius:999px;border:1px solid var(--line-2);background:var(--bg-elev);color:var(--ink)}.gl-count{font-size:.86rem;color:var(--ink-3)}.gl-list{list-style:none;padding:0;margin:8px 0 40px;display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:12px}.gl-item{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:var(--bg-elev);scroll-margin-top:calc(var(--header-h) + 70px)}.gl-item:target{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.gl-names{display:flex;flex-wrap:wrap;gap:2px 12px;align-items:baseline}.gl-en{font-weight:720;font-size:1.08rem;text-decoration:none;color:var(--ink)}.gl-ckb{font-family:var(--font-ckb);font-weight:700;color:var(--accent-ink)}.gl-missing{font-size:.82rem;color:var(--accent-2)}.gl-item p{margin:6px 0 0;font-size:.93rem;color:var(--ink-2)}.gl-st{font-size:.72rem;color:var(--ink-3);margin-top:6px;display:block}.letter-bar{display:flex;flex-wrap:wrap;gap:4px}.letter-bar a{font-size:.8rem;font-weight:650;padding:2px 7px;border-radius:6px;text-decoration:none;color:var(--ink-2);border:1px solid var(--line)}.letter-bar a:hover{border-color:var(--accent)}.term-page .td-en{font-size:2.2rem}.term-page .td-ckb{font-size:1.9rem}.prose p{margin:0 0 .9em}.site-footer{border-top:1px solid var(--line);margin-top:40px;padding:28px 20px 40px;color:var(--ink-3);font-size:.88rem}.footer-inner{max-width:1120px;margin-inline:auto;display:flex;flex-wrap:wrap;gap:16px 28px;justify-content:space-between}.footer-inner p{margin:0 0 4px}.footer-links{display:flex;gap:14px;flex-wrap:wrap}.footer-links a{color:var(--ink-2)}.offline-box{display:flex;flex-direction:column;gap:6px;align-items:flex-start}.offline-status{font-size:.82rem}.toast{position:fixed;inset-inline:12px;bottom:16px;margin-inline:auto;max-width:460px;z-index:80;display:flex;align-items:center;gap:12px;justify-content:space-between;padding:10px 12px 10px 16px;border-radius:12px;background:var(--ink);color:var(--bg);box-shadow:var(--shadow);font-size:.92rem}.toast .btn{background:var(--bg);color:var(--ink);border:0}@media(max-width:1240px){.doc{grid-template-columns:270px minmax(0,1fr);gap:0 32px}.doc-toc{display:none}.toc-mobile{display:block;margin-top:18px;border:1px solid var(--line);border-radius:var(--radius);padding:8px 14px;background:var(--bg-elev);font-size:.92rem}.toc-mobile summary{cursor:pointer;font-weight:650}.toc-mobile .toc{margin-top:8px}}@media(max-width:900px){:root{--header-h: 56px}.doc{display:block;padding-inline:16px}.doc-main{padding-top:18px}.menu-btn{display:inline-grid}.doc-side{position:fixed;top:0;bottom:0;inset-inline-start:0;z-index:70;width:min(340px,88vw);height:100vh;height:100dvh;background:var(--bg-elev);padding:16px;box-shadow:var(--shadow);transform:translate(-105%);transition:transform .22s ease;visibility:hidden}[dir=rtl] .doc-side{transform:translate(105%)}body.nav-open .doc-side{transform:none;visibility:visible}body.nav-open .drawer-backdrop{display:block;position:fixed;inset:0;z-index:65;background:#0f121666}.drawer-head{display:flex!important}.header-search{display:none}.header-search.open{display:block;position:absolute;top:calc(var(--header-h) + 6px);inset-inline:10px;max-width:none}.search-toggle{display:inline-grid}.site-header{gap:6px;padding-inline:10px}.brand{margin-inline-end:auto}.lang-switch button{padding:4px 8px;font-size:.8rem}.hide-sm{display:none!important}.search-box kbd{display:none}.prevnext{grid-template-columns:1fr}.pn--next{grid-column:1}.fig--wide{margin-inline:0}.term-dialog{margin:auto auto 0;width:100vw;max-width:100vw;border-radius:18px 18px 0 0;max-height:82vh}}@media(max-width:420px){.brand-name{display:none}.lang-switch button{padding:4px 7px}.cn{grid-template-columns:1fr}}.drawer-head{display:none;justify-content:space-between;align-items:center;margin-bottom:10px;font-weight:700}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}@media print{.site-header,.doc-side,.doc-toc,.toc-mobile,.section-tools,.copy-btn,.prevnext,.site-footer{display:none!important}.doc{display:block}details>:not(summary){display:block!important}}.fig-svg svg text{font-family:var(--font-en)}.fig-svg svg .lang-ckb,.fig-svg svg text.lang-ckb{font-family:var(--font-ckb)}.fig-svg svg .d-code{font-family:var(--font-mono)}.fig-svg svg .d-box{fill:var(--bg-elev);stroke:var(--line-2)}.fig-svg svg .d-accent{fill:var(--accent-soft);stroke:var(--accent)}.fig-svg svg .d-warm{fill:var(--warn-bg);stroke:var(--accent-2)}.fig-svg svg .d-blue{fill:var(--note-bg);stroke:var(--note)}.fig-svg svg .d-purple{fill:var(--imp-bg);stroke:var(--imp)}.fig-svg svg .d-sunk{fill:var(--bg-sunk)}.fig-svg svg .d-line{stroke:var(--ink-2)}.fig-svg svg .d-line-accent{stroke:var(--accent)}.fig-svg svg .d-fill-line{fill:var(--ink-2)}.fig-svg svg .d-fill-accent{fill:var(--accent)}.fig-svg svg .d-text{fill:var(--ink)}.fig-svg svg .d-text-2{fill:var(--ink-2)}.fig-svg svg .d-text-3{fill:var(--ink-3)}.fig-svg svg .d-text-accent{fill:var(--accent-ink)}.fig-svg svg .d-text-warm{fill:var(--accent-2)}.fig-svg svg .d-code{fill:var(--ink)}html[data-lang=both] .crumbs .l-ckb{display:none}html[data-lang=both] .code-title .l-ckb:before,html[data-lang=both] .sr-title .sr-ckb:before{content:"·";margin-inline:.45em;color:var(--ink-3)}html[data-lang=both] .code-title .l-ckb{font-weight:600;color:var(--ink-2)}html[data-lang=en] .track--ckb,html[data-lang=ckb] .track--en{display:none!important}html[data-lang=both] .track--ckb>.sec-d,html[data-lang=both] div.track--ckb{border-inline-start:3px dashed var(--accent-soft);padding-inline-start:10px}.track-note{margin-top:16px;font-size:.9rem;color:var(--ink-2);background:var(--bg-tint);border-radius:var(--radius);padding:10px 14px}.en-phrase{font-family:var(--font-en);font-style:italic;color:var(--accent-ink);unicode-bidi:isolate}.speak{display:inline-grid;place-items:center;width:28px;height:28px;margin-inline-start:6px;vertical-align:middle;border-radius:50%;border:1px solid var(--line-2);background:var(--bg-elev);color:var(--accent-ink);cursor:pointer;padding:0}.speak svg{width:15px;height:15px}.speak:hover{border-color:var(--accent)}.speak.speaking{background:var(--accent-soft)}.vocab-title,.passage-title{font-weight:700;margin-bottom:8px}.vocab-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}.vocab-item{border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev);padding:12px 14px}.vocab-head{display:flex;flex-wrap:wrap;align-items:center;gap:4px 8px;direction:ltr}.vocab-word{font-weight:750;font-size:1.12rem}.vocab-pos{font-size:.75rem;font-style:italic;color:var(--ink-3)}.vocab-ipa{font-size:.85rem;color:var(--ink-3);font-family:"Charis SIL","Doulos SIL","Gentium Plus",var(--font-en)}.vocab-ckb{margin-top:4px;font-weight:650;color:var(--accent-ink)}.vocab-ckb .term{font-weight:700}.vocab-same{font-size:.85rem;color:var(--ink-3);font-weight:500}.vocab-en{margin-top:4px;font-size:.93rem;color:var(--ink-2)}.vocab-ex{margin-top:6px;font-size:.92rem;font-style:italic;color:var(--ink-2);border-top:1px dashed var(--line);padding-top:6px}.vocab-ex-ckb{font-size:.9rem;color:var(--ink-3)}.passage,.dialogue{border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev);padding:14px 18px}.passage-head{display:flex;align-items:center;flex-wrap:wrap;gap:8px 10px;margin-bottom:8px}.passage-head .passage-title{margin:0}.passage-badge{font-size:.72rem;font-weight:750;padding:2px 9px;border-radius:999px;background:var(--note);color:var(--bg-elev)}.passage-body{font-family:Georgia,Iowan Old Style,Times New Roman,serif;font-size:1.08rem;line-height:1.75;text-align:left}.passage-body p{margin:0 0 .8em}.passage-tr{border-top:1px dashed var(--line);padding-top:8px}.passage-tr summary{cursor:pointer;font-weight:650;color:var(--accent-ink)}.passage-note p{margin:6px 0 0;font-size:.92rem;color:var(--ink-2)}.dl-line{display:grid;grid-template-columns:8.5em 1fr;gap:2px 14px;padding-block:6px;border-top:1px dashed var(--line)}.dl-line:first-of-type{border-top:0}.dl-who{font-weight:700;color:var(--accent-ink);font-size:.92rem;padding-top:2px}.dl-text p{margin:0}.dl-ckb{font-size:.92rem;color:var(--ink-3)}.fill{border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;background:var(--bg-elev)}.fill-intro{margin:0}.fill-list{margin:8px 0 0;padding-inline-start:1.4em}.fill-item{margin-block:8px}.fill-item>span[lang=en]{display:inline}.fill-input{font:inherit;width:9em;margin-inline:4px;padding:1px 8px;border:0;border-bottom:2px solid var(--line-2);background:var(--bg-sunk);color:var(--ink);border-radius:4px 4px 0 0;direction:ltr}.fill-input:focus{outline:none;border-bottom-color:var(--accent)}.fill-input.ok{border-bottom-color:var(--ok);background:var(--ok-bg)}.fill-input.bad{border-bottom-color:var(--bad);background:var(--bad-bg)}.fill-ckb{display:block;font-size:.9rem;color:var(--ink-3)}.fill-mark{margin-inline-start:8px;font-size:.85rem;color:var(--ok)}@media(max-width:600px){.dl-line{grid-template-columns:1fr}}.home{max-width:640px;margin-inline:auto;padding:clamp(48px,12vh,120px) 20px 40px}.home-hero{text-align:center}.home-mark{width:56px;height:56px}.home-name{margin-top:10px;font-size:clamp(2.4rem,2rem + 2vw,3.2rem);font-weight:780;letter-spacing:-.035em;font-family:var(--font-en)}.home-name b{color:var(--accent);font-weight:780}.home-tag{margin:8px 0 0;font-size:1.1rem;color:var(--ink-2)}.home-about{margin:10px auto 0;max-width:34rem;font-size:.92rem;line-height:1.6;color:var(--ink-3)}.home-author{margin-top:2px}.home-search{margin-top:28px}.home-search .search-box input{font-size:1.05rem;padding:14px 18px;padding-inline-start:46px;box-shadow:var(--shadow)}.home-search .search-box svg{inset-inline-start:16px;width:20px;height:20px}.home-list{margin-top:44px}.home-list ul{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}.home-row{display:flex;align-items:center;gap:12px;padding:16px 4px;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none}.home-row-title{flex:1 1 auto;font-weight:650;font-size:1.05rem}html[data-lang=both] .home-row-title .l-ckb{display:block;font-size:.88em;font-weight:550;color:var(--ink-3)}.home-row-meta{font-size:.85rem;color:var(--ink-3);white-space:nowrap}.home-row-go{color:var(--ink-3);transition:transform .15s}[dir=rtl] .home-row-go{transform:scaleX(-1)}.home-row:hover .home-row-title{color:var(--accent-ink)}.home-row:hover .home-row-go{color:var(--accent)}.home-foot{margin-top:28px;text-align:center;font-size:.85rem;color:var(--ink-3)}body.is-home .header-search,body.is-home .search-toggle{display:none!important}body.is-home .site-header{border-bottom-color:transparent;background:transparent;backdrop-filter:none;-webkit-backdrop-filter:none}body.is-home .site-header .brand{visibility:hidden}body.is-home .site-footer{border-top:0;margin-top:0}.lesson-shell{min-height:calc(100vh - var(--header-h))}.lesson{max-width:720px;margin-inline:auto;padding:0 20px 60px;font-size:1.125rem}.lesson-bar{position:sticky;top:var(--header-h);z-index:20;display:flex;align-items:center;gap:14px;padding:12px 0;background:var(--bg)}.lesson-back{display:inline-flex;align-items:center;gap:6px;min-width:0;max-width:34%;font-size:.85rem;color:var(--ink-3);text-decoration:none}.lesson-back:hover{color:var(--accent-ink)}[dir=rtl] .lesson-back-arrow,[dir=rtl] .arrow{display:inline-block;transform:scaleX(-1)}.lesson-back-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}html[data-lang=both] .lesson-back-name .l-ckb{display:none}.lesson-progress{flex:1 1 auto;height:8px;border-radius:999px;background:var(--bg-sunk);overflow:hidden}.lesson-progress-fill{display:block;height:100%;width:0;border-radius:999px;background:var(--accent);transition:width .3s ease}.lesson-count{font-size:.8rem;font-variant-numeric:tabular-nums;color:var(--ink-3);white-space:nowrap}.lesson-steps{padding-top:8px}html.js-steps .lesson:not(.view-all) .lstep:not(.is-active){display:none}html:not(.js-steps) .lesson-bar,.lesson.view-all .lesson-bar .lesson-progress,.lesson.view-all .lesson-count,.lesson.view-all .lstep-nav:not(.lstep-nav--done){display:none}.lstep{padding-block:18px 8px;animation:step-in .25s ease}.lesson.view-all .lstep+.lstep{border-top:1px solid var(--line);margin-top:28px;padding-top:34px}@keyframes step-in{0%{opacity:0;transform:translateY(6px)}}.lstep-kicker{margin:0 0 6px;font-size:.8rem;font-weight:650;color:var(--accent-ink);letter-spacing:.02em}html[data-lang=both] .lstep-kicker .l-ckb{display:none}.lstep-title{font-size:clamp(1.45rem,1.2rem + 1vw,1.8rem);font-weight:750;margin-bottom:14px}html[data-lang=both] .lstep-title .l-ckb{display:block;font-size:.72em;font-weight:650;color:var(--ink-3);margin-top:4px}.lstep-body>.b:first-child{margin-top:0}.lstep-body .b{margin-block:1.35rem}.sub{margin-top:2rem}.sub-h{font-size:1.2rem;font-weight:700;margin-bottom:.6rem}h4.sub-h{font-size:1.05rem}html[data-lang=both] .sub-h .l-ckb{display:block;font-size:.85em;color:var(--ink-3);font-weight:600}.lstep-nav{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:36px;padding-top:18px;border-top:1px solid var(--line)}.lstep--intro .lstep-nav,.lstep-nav--done{justify-content:flex-start;border-top:0;flex-wrap:wrap}.lstep-nav [data-next]{margin-inline-start:auto}.lstep--intro .lstep-nav [data-next]{margin-inline-start:0}.btn--big{font-size:1rem;padding:.7em 1.5em}.lesson-title{font-size:clamp(2rem,1.6rem + 2vw,2.6rem);font-weight:780;letter-spacing:-.025em;line-height:1.15}html[data-lang=both] .lesson-title .l-ckb{display:block;font-size:.6em;margin-top:8px;color:var(--ink-2);letter-spacing:0}.lesson-summary{color:var(--ink-2);margin-top:14px}.lesson-summary p{margin:0 0 6px}html[data-lang=both] .lesson-summary p.l-ckb{font-size:.95em;color:var(--ink-3)}.lesson-meta{font-size:.85rem;color:var(--ink-3);margin:10px 0 0}.lesson-goals{margin-top:26px;padding:16px 20px;border-radius:14px;background:var(--bg-tint)}.lesson-goals-h{font-size:.85rem;font-weight:700;color:var(--accent-ink);margin-bottom:6px}.lesson-goals ul{list-style:none;margin:0;padding:0}.lesson-goals li{position:relative;padding-inline-start:26px;margin-block:6px}.lesson-goals li:before{content:"✓";position:absolute;inset-inline-start:0;color:var(--accent);font-weight:800}html[data-lang=both] .lesson-goals ul.l-ckb{margin-top:10px;color:var(--ink-2);font-size:.95em}.lstep--done{text-align:center}.lstep--done .lstep-nav{justify-content:center}.done-mark{width:72px;height:72px;margin:10px auto 14px;border-radius:50%;display:grid;place-items:center;font-size:2rem;font-weight:800;background:var(--accent);color:#fff}.done-next{color:var(--ink-3);font-size:.9rem;margin-top:8px}.lstep--done .lesson-goals,.lesson-more{text-align:start;margin-top:26px}.lesson-more ul{padding-inline-start:1.2em;margin:6px 0;font-size:.95rem}.lesson-more summary{cursor:pointer;font-weight:650;font-size:.9rem}.lesson-mode{margin-top:34px;text-align:center}.linklike{font:inherit;font-size:.85rem;border:0;background:none;color:var(--ink-3);text-decoration:underline;cursor:pointer}.linklike:hover{color:var(--accent-ink)}html:not(.js-steps) .lesson-mode{display:none}body.is-lesson .menu-btn{display:inline-grid}body.is-lesson .doc-side{position:fixed;top:0;bottom:0;inset-inline-start:0;z-index:70;width:min(360px,88vw);height:100vh;height:100dvh;background:var(--bg-elev);padding:16px;box-shadow:var(--shadow);transform:translate(-105%);transition:transform .22s ease;visibility:hidden}[dir=rtl] body.is-lesson .doc-side{transform:translate(105%)}body.is-lesson.nav-open .doc-side{transform:none;visibility:visible}body.is-lesson.nav-open .drawer-backdrop{display:block;position:fixed;inset:0;z-index:65;background:#0f121666}body.is-lesson .drawer-head{display:flex}.b-p p{line-height:1.75}html[data-lang=both] .b-p p.l-ckb,html[data-lang=both] .b-list>.l-ckb,html[data-lang=both] .callout-body>p.l-ckb,html[data-lang=both] .analogy>p.l-ckb,html[data-lang=both] .step>p.l-ckb,html[data-lang=both] .exercise>p.l-ckb{border-inline-start:0;padding-inline-start:0;color:var(--ink-3);font-size:.96em}.callout{border-inline-start:0;border-radius:14px;padding:14px 18px}.def{box-shadow:none;border:0;background:var(--bg-tint);border-radius:14px}.analogy{border:0;background:var(--bg-tint);border-radius:14px}.analogy-limits{margin-top:8px;padding-top:0;border-top:0}.analogy-limits summary{cursor:pointer;font-size:.85rem;font-weight:650;color:var(--ink-3)}.exercise,.quiz fieldset,.qa,.fill{border-radius:14px}.code{--code-card: #1e2229;background:var(--code-card);border:0;border-radius:14px;color:#e6e6e6;box-shadow:0 2px 10px #0000001f}.code .code-head{background:transparent;border-bottom:1px solid rgb(255 255 255 / .08);color:#9aa1ab}.code .code-title{color:#f1f1f1}.code .code-file{color:#c9d1d9}.code .code-runs{background:#4fc1b026;color:#7dd8ca}.code .code-runs--browser{background:#8db6f226;color:#a8c7f5}.code .copy-btn{background:transparent;border-color:#ffffff2e;color:#c9d1d9}.code .shiki{background-color:transparent!important}.code--numbered .code-body .line:before{color:#6b7280}.code-body .line.hl{background:#ffd6661f!important}.code-run{padding:0 14px 12px}.run-btn{display:inline-flex;align-items:center;gap:8px;font:inherit;font-size:.88rem;font-weight:700;padding:7px 16px;border-radius:999px;border:0;background:#2fb380;color:#062b1c;cursor:pointer}.run-btn:hover{background:#3ccb92}.run-btn[aria-expanded=true]{background:#ffffff1f;color:#e6e6e6}.code-out .out{border-top:0;background:#f7f8f8;color:#1b1d20;margin:0 12px 12px;border-radius:10px}:root[data-theme=dark] .code-out .out{background:#0f1216;color:#e7e6e3}.code-out .out-head{color:#6b7078}.code .code-notes{background:#ffffff0a;border-top:1px solid rgb(255 255 255 / .08);color:#e6e6e6}.code .code-notes summary{color:#9aa1ab}.code .cn{border-top-color:#ffffff1a}.code .cn dt{color:#7dd8ca}.code .code-notes .l-ckb{color:#c9d1d9}.code .term{color:inherit}.chapter li a.is-done .lec-idx{color:var(--ok);font-weight:800}.chapter li a.is-done .lec-idx:before{content:"✓ "}.course{max-width:680px;margin-inline:auto;padding:18px 20px 60px}.course-head{padding:18px 0 26px}.course-title{font-size:clamp(1.9rem,1.5rem + 1.8vw,2.5rem);font-weight:780;letter-spacing:-.025em;line-height:1.15}html[data-lang=both] .course-title .l-ckb{display:block;font-size:.62em;margin-top:8px;color:var(--ink-2);letter-spacing:0}.course-summary{color:var(--ink-2);margin-top:12px}.course-summary p{margin:0 0 6px}html[data-lang=both] .course-summary p.l-ckb{color:var(--ink-3);font-size:.95em}.course-meta{font-size:.88rem;color:var(--ink-3);margin:12px 0 18px}.course-progress{color:var(--ok);font-weight:650}.path{list-style:none;margin:0;padding:0}.path-chapter{margin-bottom:8px}.path-chapter-head{list-style:none;display:flex;align-items:center;gap:12px;padding:12px 4px;cursor:pointer}.path-chapter-head::-webkit-details-marker{display:none}.path-num{flex:0 0 auto;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent-ink);font-weight:750;font-size:.9rem;font-family:var(--font-en)}.path-chapter-title{flex:1;font-weight:700;font-size:1.08rem}html[data-lang=both] .path-chapter-title .l-ckb{display:block;font-size:.86em;font-weight:600;color:var(--ink-3)}.path-count{font-size:.8rem;color:var(--ink-3)}.path-lessons{list-style:none;margin:0 0 6px;padding:0;margin-inline-start:15px;border-inline-start:2px solid var(--line)}.path-lesson{display:flex;align-items:center;gap:12px;padding:10px 12px;margin-inline-start:-9px;color:var(--ink);text-decoration:none;border-radius:10px}.path-lesson:hover{background:var(--bg-sunk)}.path-dot{flex:0 0 auto;width:16px;height:16px;border-radius:50%;border:2px solid var(--line-2);background:var(--bg)}.path-lesson.is-done .path-dot{border-color:var(--ok);background:var(--ok);box-shadow:inset 0 0 0 3px var(--bg)}.path-lesson.is-next .path-dot{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}.path-lesson-title{flex:1;font-weight:560}html[data-lang=both] .path-lesson-title .l-ckb{display:block;font-size:.88em;color:var(--ink-3);font-weight:500}.path-idx{font-size:.78rem;color:var(--ink-3);font-variant-numeric:tabular-nums}.out-html .shiki,.td-code .shiki{border-radius:8px;margin:0 10px 10px}.td-code{background:#1e2229;border:0}.video{margin-inline:0;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev);overflow:hidden}.video-frame{position:relative;aspect-ratio:16 / 9;background:linear-gradient(135deg,var(--bg-sunk),var(--line))}.video-play{position:absolute;inset:0;width:100%;height:100%;padding:0;border:0;background:transparent;cursor:pointer;display:block}.video-thumb{display:block;width:100%;height:100%;object-fit:cover}.no-thumb .video-thumb{visibility:hidden}.video-btn{position:absolute;left:50%;top:50%;width:64px;height:64px;transform:translate(-50%,-50%);border-radius:50%;display:grid;place-items:center;background:#0000009e;color:#fff;transition:transform .15s,background .15s}.video-btn svg{width:30px;height:30px;margin-left:4px}.video-play:hover .video-btn,.video-play:focus-visible .video-btn{background:var(--accent);transform:translate(-50%,-50%) scale(1.06)}.video-len{position:absolute;inset-inline-end:8px;bottom:8px;padding:1px 6px;border-radius:4px;background:#000000b8;color:#fff;font:600 .75rem/1.5 var(--font-en);direction:ltr}.video-iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.video-cap{padding:10px 14px 12px;text-align:start}.video-title{display:block;font-weight:600;color:var(--ink);text-decoration:none;line-height:1.4}.video-title:hover{color:var(--accent-ink);text-decoration:underline}.video-title:lang(ckb){font-family:var(--font-ckb);text-align:right}.video-meta{display:block;margin-top:2px;font-size:.8rem;color:var(--ink-3)}html[dir=rtl] .video-meta{direction:rtl;text-align:right}.video-meta .u-ckb,.video-meta .l-ckb{font-family:var(--font-ckb)}.video-of{opacity:.8}.video-why,.video-note{margin:6px 0 0;font-size:.9rem;color:var(--ink-2)}.video-note{color:var(--ink-3)}html[data-lang=both] .video-why.l-ckb,html[data-lang=both] .video-note.l-ckb{margin-top:2px}.video-offline{margin:0 0 6px;font-size:.85rem;color:var(--warn)}.video-intro{color:var(--ink-2)}html[data-lang=en] .video--ku{display:none}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr));gap:14px;align-items:start}.video-grid .video{margin:0}.video--small .video-cap{padding:8px 12px 10px}.video--small .video-why{font-size:.85rem}.video--small .video-btn{width:52px;height:52px}.video-item[hidden]{display:none}.video-item .term-chips{margin:8px 0 0}.term-chips--small .chip{font-size:.82rem;padding:2px 10px}.video-where{display:block;margin-top:6px;font-size:.82rem;color:var(--ink-3);text-decoration:none}.video-where:hover{color:var(--accent-ink)}.videos-course{margin-top:36px}.videos-h{font-size:1.3rem;margin-bottom:6px}.videos-lesson{margin-top:20px}.videos-lesson-h{font-size:1rem;margin-bottom:10px}.videos-lesson-h a{color:var(--ink);text-decoration:none}.videos-lesson-h a:hover{color:var(--accent-ink)}.video-filter{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.video-filter .chip{cursor:pointer;font:inherit;font-size:.9rem}.video-filter .chip.is-on{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-ink)}.page-note{margin-top:8px;font-size:.85rem;color:var(--ink-3)}.td-video{display:inline-flex;gap:8px;align-items:center;font-weight:600;text-decoration:none;color:var(--accent-ink)}.td-video:hover{text-decoration:underline}.fig-svg svg .d-on-accent{fill:#fff}:root[data-theme=dark] .fig-svg svg .d-on-accent{fill:var(--bg)}.tech{margin-top:22px;padding-top:18px;border-top:1px solid var(--line);scroll-margin-top:80px}.tech-h{font-size:.82rem;font-weight:700;color:var(--ink-3);text-transform:uppercase;letter-spacing:.05em;margin:0 0 10px}.tech-h :lang(ckb){text-transform:none;letter-spacing:0;font-size:.95rem}.tech-switch{display:inline-flex;flex-wrap:wrap;gap:4px;padding:3px;border-radius:999px;background:var(--bg-sunk);border:1px solid var(--line);margin-bottom:14px}.tech-btn{font:inherit;font-size:.92rem;font-weight:650;border:0;background:transparent;color:var(--ink-2);padding:5px 16px;border-radius:999px;cursor:pointer}.tech-btn[aria-pressed=true]{background:var(--bg-elev);color:var(--accent-ink);box-shadow:var(--shadow)}html[data-lang=both] .tech-btn .l-ckb{display:none}.tech-summary{color:var(--ink-2);font-size:.95rem;margin-bottom:6px}.tech-summary p{margin:0 0 4px}html[data-lang=both] .tech-summary p.l-ckb{color:var(--ink-3)}.tech-badge{font-weight:700;color:var(--accent-ink)}html[data-lang=both] .tech-badge .l-ckb{display:none}.nav-node--tech{font-weight:650;color:var(--accent-ink)}.math{direction:ltr;unicode-bidi:isolate;white-space:nowrap}.math .katex{font-size:1.12em}.math-block{margin-block:14px;text-align:center}.math-block .math-display{direction:ltr;overflow-x:auto;overflow-y:hidden;padding:12px 10px;border-radius:var(--radius);background:var(--bg-sunk)}.math-block .math-display .katex-display{margin:0}.math-title{font-weight:650;font-size:.92rem;color:var(--ink-2);margin-bottom:6px}.math-note{margin-top:8px;font-size:.93rem;color:var(--ink-2)}.fig-anim{position:relative;display:block;margin-inline:auto;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--bg-elev)}.fig-anim img{display:block;width:100%;height:auto}.fig-anim canvas.anim-still{position:absolute;inset:0;width:100%;height:100%}.anim-toggle{position:absolute;inset-inline-end:8px;bottom:8px;display:inline-flex;align-items:center;gap:6px;font:inherit;font-size:.8rem;font-weight:650;border:0;border-radius:999px;padding:5px 11px;background:#0009;color:#fff;cursor:pointer}.anim-toggle svg{width:14px;height:14px}.anim-toggle .anim-play,.fig-anim.is-paused .anim-toggle .anim-pause{display:none}.fig-anim.is-paused .anim-toggle .anim-play{display:inline}.fig--small .fig-anim{max-width:420px}
