@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-cyrillic-ext-wght-normal-BOeWTOD4.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:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-cyrillic-wght-normal-DqGufNeO.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-greek-ext-wght-normal-DlzME5K_.woff2)format("woff2-variations");unicode-range:U+1F??}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-greek-wght-normal-CkhJZR-_.woff2)format("woff2-variations");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-vietnamese-wght-normal-CBcvBZtf.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:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-latin-ext-wght-normal-DO1Apj_S.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:Inter Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/inter-latin-wght-normal-Dx4kXJAl.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-family:Noto Sans Devanagari Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/noto-sans-devanagari-devanagari-wght-normal-DWI_L5Cu.woff2)format("woff2-variations");unicode-range:U+900-97F,U+1CD0-1CF9,U+200C-200D,U+20A8,U+20B9,U+20F0,U+25CC,U+A830-A839,U+A8E0-A8FF,U+11B00-11B09}@font-face{font-family:Noto Sans Devanagari Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/noto-sans-devanagari-latin-ext-wght-normal-CLkupaxV.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:Noto Sans Devanagari Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/noto-sans-devanagari-latin-wght-normal-Bxfr4UJH.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-family:Plus Jakarta Sans Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(data:font/woff2;base64,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)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:Plus Jakarta Sans Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(/assets/plus-jakarta-sans-vietnamese-wght-normal-qRpaaN48.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:Plus Jakarta Sans Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(/assets/plus-jakarta-sans-latin-ext-wght-normal-DmpS2jIq.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:Plus Jakarta Sans Variable;font-style:normal;font-display:swap;font-weight:200 800;src:url(/assets/plus-jakarta-sans-latin-wght-normal-eXO_dkmS.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:"0.19.0"}.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{--bg:#f4f5f9;--bg-deep:#eceef5;--card:#fff;--line:#e3e6ef;--line-strong:#cdd3e1;--ink:#12172b;--ink-soft:#3a4157;--muted:#6a7189;--primary:#3b48d4;--primary-strong:#2b36a6;--primary-soft:#eef0fd;--primary-line:#c9cdf6;--navy:#121838;--navy-2:#1d2552;--accent:#f0a53a;--good:#137a47;--good-soft:#e4f5eb;--bad:#be3329;--bad-soft:#fdeceb;--warn-soft:#fff6e3;--radius:18px;--radius-md:12px;--shadow-xs:0 1px 2px #12172b0f;--shadow:0 1px 2px #12172b0a, 0 10px 28px -14px #12172b2e;--shadow-lg:0 28px 70px -28px #12183866;--ring:0 0 0 3px #3b48d438;--font:"Inter Variable", "Noto Sans Devanagari Variable", system-ui, -apple-system, "Segoe UI", sans-serif;--font-display:"Plus Jakarta Sans Variable", "Noto Sans Devanagari Variable", "Inter Variable", system-ui, sans-serif;--lh:1.6}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;font-size:16px}html[data-mode=classroom]{font-size:19px}html[lang=hi]{--lh:1.75}body{background:var(--bg);color:var(--ink);font-family:var(--font);line-height:var(--lh);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0}h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:-.015em;font-weight:700;line-height:1.25}html[lang=hi] :is(h1,h2,h3,h4){letter-spacing:0;line-height:1.45}::selection{background:#dde1fc}a{color:var(--primary);text-underline-offset:3px}:where(button,a,input,select,textarea,summary):focus-visible{outline:2px solid var(--primary);outline-offset:2px}p{margin:.4rem 0}.eyebrow{letter-spacing:.09em;text-transform:uppercase;color:var(--primary);font-size:.74rem;font-weight:700;display:inline-block}html[lang=hi] .eyebrow{letter-spacing:0;font-size:.82rem}.muted{color:var(--muted)}.small-text{font-size:.85rem}.pre{white-space:pre-line}button,a.button{font:inherit;cursor:pointer;border:1px solid #0000;border-radius:11px;padding:.55rem 1.05rem;font-weight:600;line-height:1.3;transition:background-color .15s,border-color .15s,color .15s,box-shadow .15s,transform .1s}button:active:not(:disabled),a.button:active{transform:translateY(1px)}a.button{justify-content:center;align-items:center;gap:.45rem;text-decoration:none;display:inline-flex}button svg,a.button svg{vertical-align:-.18em;flex:none}button:disabled{opacity:.45;cursor:not-allowed}.primary{background:var(--primary);color:#fff;box-shadow:inset 0 1px #ffffff2e,0 6px 16px -8px #3b48d4a6}.primary:hover:not(:disabled){background:var(--primary-strong)}.secondary{border-color:var(--line);color:var(--ink);box-shadow:var(--shadow-xs);background:#fff}.secondary:hover:not(:disabled){border-color:var(--primary-line);color:var(--primary-strong)}.link{color:var(--primary);text-underline-offset:3px;background:0 0;border:none;padding:0;font-weight:600;text-decoration:underline;text-decoration-thickness:1.5px}.small{border-radius:9px;padding:.34rem .78rem;font-size:.88rem}.large{border-radius:13px;padding:.8rem 1.4rem;font-size:1.05rem}.chip{border:1px solid var(--line);color:var(--ink-soft);background:#fff;border-radius:999px;padding:.38rem .95rem}.chip:hover:not(.active){border-color:var(--primary-line);color:var(--primary-strong)}.chip.active{background:var(--navy);border-color:var(--navy);color:#fff}.chips{flex-wrap:wrap;gap:.45rem;display:flex}.segmented{background:var(--bg-deep);border:1px solid var(--line);border-radius:11px;gap:2px;padding:3px;display:inline-flex}.segmented button{color:var(--muted);background:0 0;border:none;border-radius:8px;padding:.3rem .8rem}.segmented button:hover:not(.active){color:var(--ink)}.segmented button.active{color:var(--ink);background:#fff;box-shadow:0 1px 3px #12172b24,0 0 0 1px #12172b0a}:where(input:not([type=checkbox]):not([type=radio]):not([type=range]),select,textarea){font:inherit;color:var(--ink);border:1.5px solid var(--line-strong);background:#fff;border-radius:10px;padding:.5rem .7rem;transition:border-color .15s,box-shadow .15s}:where(input:not([type=checkbox]):not([type=radio]):not([type=range]),select,textarea):focus{border-color:var(--primary);box-shadow:var(--ring);outline:none}input[type=range],input[type=checkbox],input[type=radio]{accent-color:var(--primary)}.row{flex-wrap:wrap;align-items:center;gap:.5rem;margin-top:.6rem;display:flex}.row.spread{justify-content:space-between;margin-top:0}.spacer{flex:1}.app-header{-webkit-backdrop-filter:saturate(1.6)blur(14px);border-bottom:1px solid var(--line);z-index:30;background:#ffffffd1;position:sticky;top:0}.header-row{justify-content:space-between;align-items:center;gap:.75rem;max-width:1280px;margin:0 auto;padding:.6rem 1.25rem;display:flex}.header-controls{align-items:center;gap:.5rem;display:flex}@media (width<=480px){.header-row{gap:.5rem;padding:.55rem .85rem}.header-controls{gap:.35rem}.header-controls .segmented button{padding:.28rem .55rem}.header-controls .icon-button{padding:.42rem .55rem}}.brand{font-family:var(--font-display);letter-spacing:-.02em;color:var(--ink);white-space:nowrap;align-items:center;gap:.6rem;font-size:1.15rem;font-weight:800;text-decoration:none;display:flex}.brand-mark{color:#fff;background:linear-gradient(140deg,#5664f2 0%,#2b36a6 100%);border-radius:10px;place-items:center;width:34px;height:34px;display:grid;box-shadow:inset 0 1px #ffffff47,0 6px 14px -6px #2b36a6bf}.crumbs{max-width:1280px;color:var(--muted);margin:0 auto;padding:0 1.25rem .55rem;font-size:.82rem}.crumbs a{color:var(--muted);text-decoration:none}.crumbs a:hover{color:var(--primary)}.crumb-sep{opacity:.6;margin:0 .45rem}.page{max-width:1280px;margin:0 auto;padding:1.25rem}html[data-mode=classroom] .page{max-width:1600px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-xs);padding:1.15rem 1.25rem}.card h3{margin:0 0 .7rem;font-size:1.08rem}h4{margin:.8rem 0 .4rem}.sim-title{padding:.6rem 0 .2rem}.sim-title h1{margin:.25rem 0 .3rem;font-size:clamp(1.6rem,1.15rem + 1.5vw,2.15rem)}.sim-title>p{max-width:760px;font-size:1.02rem}.tabs{scrollbar-width:none;background:var(--bg-deep);border:1px solid var(--line);border-radius:13px;gap:2px;width:fit-content;max-width:100%;margin:1rem 0;padding:4px;display:flex;overflow-x:auto}.tabs button{color:var(--muted);white-space:nowrap;background:0 0;border:none;border-radius:10px;align-items:center;gap:.45rem;padding:.48rem 1rem;display:inline-flex}.tabs button:hover:not(.active){color:var(--ink)}.tabs button.active{color:var(--ink);background:#fff;box-shadow:0 1px 3px #12172b24,0 0 0 1px #12172b0a}.tabs button.active svg{color:var(--primary)}@media (width<=600px){.tabs button{padding:.45rem .7rem}}.home-wrap{overflow-x:clip}.home{max-width:1280px;margin:0 auto;padding:0 1.25rem 2rem}.hero{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);align-items:center;gap:2.5rem;padding:3.5rem 0 3rem;display:grid;position:relative}.hero:before{content:"";z-index:-1;background:radial-gradient(38rem 22rem at 78% 30%,#5b68f029,#0000 70%),radial-gradient(28rem 18rem at 12% 10%,#f0a53a1f,#0000 70%);position:absolute;inset:-2rem -40vw 0}.hero h1{letter-spacing:-.035em;margin:.7rem 0 .9rem;font-size:clamp(2.3rem,1.4rem + 3.2vw,3.6rem);line-height:1.08}html[lang=hi] .hero h1{letter-spacing:0;line-height:1.3}.lead{color:var(--ink-soft);max-width:34rem;font-size:1.15rem}.hero-actions{flex-wrap:wrap;gap:.7rem;margin-top:1.6rem;display:flex}.hero-card{border:1px solid var(--line);box-shadow:var(--shadow-lg);background:#fff;border-radius:24px;padding:1rem;transform:rotate(-1.2deg)}.hero-card .stage-legend{display:none}.home-section{padding:2.5rem 0 1rem}.section-head{margin-bottom:1.4rem}.section-head h2{letter-spacing:-.025em;margin:0;font-size:clamp(1.5rem,1.2rem + 1vw,2rem)}.section-head p{max-width:44rem;margin-top:.4rem}.sim-cards{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.25rem;display:grid}.sim-card{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow-xs);border-radius:22px;flex-direction:column;transition:box-shadow .2s,transform .2s;display:flex;overflow:hidden}.sim-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}.sim-thumb{border-bottom:1px solid var(--line);pointer-events:none;background:linear-gradient(#f7f8fc,#eef0f7);height:210px;padding:.6rem;display:block;overflow:hidden}.sim-thumb .stage-legend,.sim-thumb .stage-caption,.sim-thumb .board{display:none}.sim-thumb svg{width:100%;height:100%}.sim-card-body{flex-direction:column;flex:1;gap:.2rem;padding:1.1rem 1.25rem .6rem;display:flex}.sim-card h3{margin:.25rem 0 0;font-size:1.22rem}.sim-card h3 a{color:var(--ink);text-decoration:none}.sim-actions{flex-wrap:wrap;gap:.5rem;margin-top:auto;padding-top:.8rem;display:flex}.sim-card .teacher-links{border-top:1px solid var(--line);background:#fafbfd;margin:0;padding:.75rem 1.25rem}.features{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem;display:grid}.feature{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem 1.25rem}.feature h3{margin:.8rem 0 .3rem;font-size:1.05rem}.feature p{margin:0}.feature-icon{background:var(--primary-soft);width:40px;height:40px;color:var(--primary);border-radius:12px;flex:none;place-items:center;display:inline-grid}.teachers-band{color:#dfe3f7;background:radial-gradient(30rem 16rem at 90% 0%, #5b68f073, transparent 70%), linear-gradient(160deg, var(--navy-2), var(--navy));box-shadow:var(--shadow-lg);border-radius:28px;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);align-items:center;gap:2rem;margin:3rem 0 1rem;padding:2.5rem;display:grid}.teachers-band h2{color:#fff;margin:.5rem 0;font-size:clamp(1.5rem,1.2rem + 1vw,2rem)}.teachers-band .eyebrow{color:#aab3ff}.teachers-band p{max-width:36rem}.button.on-dark{color:var(--navy);background:#fff;margin-top:1rem}.button.on-dark:hover{background:#e9ebfb}.teacher-points{gap:.7rem;margin:0;padding:0;list-style:none;display:grid}.teacher-points li{color:#fff;background:#ffffff0f;border:1px solid #ffffff1a;border-radius:14px;align-items:center;gap:.8rem;padding:.75rem .9rem;font-weight:500;display:flex}.teacher-points .feature-icon{color:#c3c9ff;background:#aab3ff29}.site-footer{border-top:1px solid var(--line);color:var(--muted);align-items:center;gap:.7rem;margin-top:2.5rem;padding-top:1.5rem;font-size:.9rem;display:flex}.small-mark{border-radius:8px;width:26px;height:26px;font-size:.8rem;font-weight:800}@media (width<=900px){.hero,.teachers-band{grid-template-columns:1fr}.hero{padding-top:2rem}.hero-card{transform:none}.teachers-band{padding:1.6rem}}.tags{flex-wrap:wrap;gap:.4rem;margin-bottom:.5rem;display:flex}.tag{color:var(--ink-soft);background:#eef0f6;border-radius:999px;align-items:center;gap:.3rem;padding:.16rem .62rem;font-size:.78rem;font-weight:600;display:inline-flex}.tag.real{color:#9b2c22;background:#fdeceb}.tag.virtual{color:#5a2bb3;background:#f1ecfe}.tag.marks{background:var(--primary-soft);color:var(--primary-strong)}.tag.source{color:#85500a;background:#fff1d6}.tip{background:var(--warn-soft);border:1px solid #f5e1b5;border-left:3px solid var(--accent);color:#533d0e;border-radius:10px;margin-top:.55rem;padding:.5rem .8rem;font-size:.92rem}.feedback{border:1px solid #0000;border-radius:12px;margin-top:.6rem;padding:.7rem .9rem}.feedback.good{background:var(--good-soft);color:#0e4b2e;border-color:#c5e8d3}.feedback.bad{background:var(--bad-soft);color:#7a1d16;border-color:#f6cfcb}.feedback button{margin-top:.5rem}.hint-line{color:var(--primary);font-weight:600}.points{gap:.4rem;margin:0;padding-left:1.2rem;display:grid}.points li::marker{color:var(--primary)}.learn{grid-template-columns:minmax(0,1.9fr) minmax(300px,1fr);grid-template-areas:"stage side""controls side""formula side""table table";align-items:start;gap:1rem;display:grid}.stage{grid-area:stage}.controls{grid-area:controls}.side{flex-direction:column;grid-area:side;gap:1rem;display:flex}.formula{grid-area:formula}.case-table{grid-area:table}@media (width<=900px){.learn{grid-template-columns:minmax(0,1fr);grid-template-areas:"stage""controls""side""formula""table"}}.ray-diagram{touch-action:pan-y;-webkit-user-select:none;user-select:none;background:#fbfdff;border-radius:10px;width:100%;height:auto;display:block}.axis{stroke:#94a3b8;stroke-width:1.5px}.lens{fill:#38bdf838;stroke:#0284c7;stroke-width:2px}.point{fill:#334155}.point-label{text-anchor:middle;dominant-baseline:hanging;fill:#334155;font-size:17px;font-weight:600}.ray{fill:none;stroke-width:2.6px}html[data-mode=classroom] .ray{stroke-width:3.6px}.ray.dashed{stroke-dasharray:8 7;stroke-width:2px}.obj-label,.img-label{text-anchor:middle;font-size:17px;font-weight:700}.obj-label{fill:#2563eb}.img-label{fill:#dc2626}.drag-hint{fill:#2563eb;text-anchor:middle;dominant-baseline:hanging;font-size:14px}.drag-handle{fill:#0000;cursor:ew-resize}.note-text{fill:#9a3412;font-size:15px;font-weight:600}.ruler line{stroke:#94a3b8}.ruler text{fill:#64748b;text-anchor:middle;font-size:12px}.ruler .ruler-label{text-anchor:end}@media (width<=700px){.ray-diagram .point-label,.ray-diagram .obj-label,.ray-diagram .img-label{font-size:27px}.ray-diagram .note-text{font-size:26px}.ray-diagram .drag-hint{font-size:24px}.ruler text{font-size:22px}.ruler .ruler-label{display:none}}.draw-in{stroke-dasharray:1;stroke-dashoffset:1px;animation:.9s forwards draw}@keyframes draw{to{stroke-dashoffset:0}}.fade-in{animation:.5s both fade}@keyframes fade{0%{opacity:0}to{opacity:1}}.legend{color:var(--muted);flex-wrap:wrap;gap:.3rem 1rem;margin:.5rem 0 0;font-size:.85rem;display:flex}.legend-item{align-items:center;gap:.35rem;display:inline-flex}.swatch{border-radius:2px;width:22px;height:4px;display:inline-block}.swatch.ray1{background:#ea580c}.swatch.ray2{background:#16a34a}.swatch.ray3{background:#9333ea}.toolbar{flex-wrap:wrap;align-items:center;gap:.5rem 1rem;margin-top:.6rem;display:flex}.check{cursor:pointer;align-items:center;gap:.35rem;display:inline-flex}.check input{width:18px;height:18px;accent-color:var(--primary)}.draw-steps{background:#fff7ed;border:1px solid #fed7aa;border-radius:12px;margin-top:.75rem;padding:.75rem 1rem}.draw-caption{margin:0;font-weight:600}.molecule-viewer{touch-action:pan-y;-webkit-user-select:none;user-select:none;cursor:grab;background:radial-gradient(circle at 50% 45%,#fff 0%,#f1f5f9 100%);border-radius:10px;width:100%;height:auto;display:block}.molecule-viewer:active{cursor:grabbing}.bond-edge{stroke:#64748b;stroke-linecap:round}.bond-core{stroke:#e2e8f0;stroke-linecap:round}.bond-double{stroke:#475569;stroke-linecap:round}.atom{stroke:#0f172a59;stroke-width:1.5px}.atom-label{text-anchor:middle;dominant-baseline:central;pointer-events:none;font-weight:700}.central-label{paint-order:stroke;stroke:#0f172a73;stroke-width:3px}.lone-pair ellipse{fill:#facc1573;stroke:#ca8a04;stroke-width:1.5px}.electron{fill:#713f12}.angle-mark polyline{fill:none;stroke:#7c3aed;stroke-width:2.5px;stroke-dasharray:5 4}.angle-mark text{fill:#5b21b6;text-anchor:middle;dominant-baseline:central;paint-order:stroke;stroke:#fff;stroke-width:5px;font-size:17px;font-weight:700}.viewer-hint{fill:#64748b;font-size:14px}@media (width<=700px){.angle-mark text{font-size:26px}.viewer-hint{font-size:22px}}.mol-title{margin:0;font-size:1.25rem}.swatch.lone{background:#facc1599;border:1.5px solid #ca8a04;border-radius:50%;width:18px;height:12px}.mol-controls{grid-template-columns:1fr;align-items:start}.formula-chip{min-width:3.6rem;font-weight:600}.builder{grid-template-columns:auto 1fr;align-items:center;gap:.4rem .8rem;margin-top:.4rem;display:grid}.mc-options{flex-direction:column;align-items:stretch}.mc-options .option{text-align:left}.lp-graph{background:#fff;border-radius:10px;width:100%;height:auto;display:block}.lp-graph .grid line{stroke:#eef2f7;stroke-width:1px}.lp-graph .axes line{stroke:#334155;stroke-width:2px}.lp-graph .tick-x{fill:#64748b;text-anchor:middle;font-size:13px}.lp-graph .tick-y{fill:#64748b;text-anchor:end;dominant-baseline:central;font-size:13px}.lp-graph .axis-name{fill:#334155;font-size:16px;font-style:italic;font-weight:700}.lp-graph .region{fill:#22c55e47;stroke:#16a34a;stroke-width:1.5px}.lp-graph .half-plane{fill:#ef44441a}.lp-graph .check-line line{stroke:#dc2626;stroke-width:2px;stroke-dasharray:3 5}.lp-graph .con-line{stroke-width:2.5px}.lp-graph .con-label{paint-order:stroke;stroke:#fff;stroke-width:4px;font-size:14px;font-weight:700}.lp-graph .z-line line{stroke:#7c3aed;stroke-width:2.5px;stroke-dasharray:9 6}.lp-graph .z-line text{fill:#6d28d9;text-anchor:end;paint-order:stroke;stroke:#fff;stroke-width:4px;font-size:15px;font-weight:700}.lp-graph .corner circle{fill:#fff;stroke:#0f172a;stroke-width:2px}.lp-graph .corner.best circle{fill:#dc2626;stroke:#7f1d1d}.lp-graph .corner text{fill:#0f172a;paint-order:stroke;stroke:#fff;stroke-width:4px;font-size:14px;font-weight:700}@media (width<=700px){.lp-graph .tick-x,.lp-graph .tick-y{font-size:20px}.lp-graph .con-label,.lp-graph .corner text,.lp-graph .z-line text{font-size:21px}}.swatch.region{background:#22c55e73;border:1.5px solid #16a34a;border-radius:3px;width:18px;height:12px}.lp-controls{grid-template-columns:1fr;align-items:start}.lp-editor{flex-direction:column;gap:.5rem;display:flex}.lp-row{flex-wrap:wrap;align-items:center;gap:.5rem .8rem;display:flex}.lp-row-label{font-size:.9rem;font-weight:600}.lp-expr{flex-wrap:wrap;align-items:center;gap:.35rem;font-size:1.05rem;font-style:italic;display:inline-flex}.lp-expr input.coef{width:4.2rem;font:inherit;text-align:center;border:1.5px solid var(--line);border-radius:8px;padding:.3rem .4rem;font-style:normal}.lp-expr input.coef.bad{border-color:var(--bad);background:var(--bad-soft)}.lp-expr select{font:inherit;border:1.5px solid var(--line);background:#fff;border-radius:8px;padding:.25rem .3rem;font-style:normal}.story{background:var(--primary-soft);border-radius:var(--radius-md);margin-bottom:.6rem;padding:.6rem .8rem}.best-mark{color:var(--bad);white-space:nowrap;font-weight:700}.hint-graph{max-width:420px;margin-top:.5rem}.controls{grid-template-columns:1fr 1fr auto;align-items:end;gap:1rem 1.5rem;display:grid}@media (width<=700px){.controls{grid-template-columns:1fr}.controls .chip{justify-self:start}}.slider{flex-direction:column;gap:.3rem;margin-top:.4rem;display:flex}.slider-label{font-size:.9rem;font-weight:600}.slider-row{align-items:center;gap:.4rem;display:flex}.slider-row input[type=range]{min-width:0;accent-color:var(--primary);flex:1;height:28px}.slider-value{color:var(--primary);font-weight:700}.facts{grid-template-columns:auto 1fr;gap:.2rem .8rem;margin:0 0 .5rem;display:grid}.facts dt{color:var(--muted)}.facts dd{margin:0;font-weight:600}.live{background:var(--primary-soft);border-radius:var(--radius-md);padding:.55rem .8rem;font-weight:500}.real-life{border-radius:var(--radius-md);background:#f0fdf4;margin:.5rem 0;padding:.5rem .75rem}.question{font-weight:600}.options{flex-wrap:wrap;gap:.5rem;display:flex}.option{border:1.5px solid var(--line);border-radius:var(--radius-md);color:var(--ink);text-align:left;background:#fff;padding:.5rem .9rem;font-weight:500}.option:hover:not(:disabled){border-color:var(--primary-line)}.option.chosen{border-color:var(--primary);background:var(--primary-soft)}.option.correct{border-color:var(--good);background:var(--good-soft)}.option:disabled{opacity:1;cursor:default}.option:disabled:not(.chosen):not(.correct){opacity:.55}.big-result{font-size:1.1rem;font-weight:700}.steps{gap:.2rem;margin:0;padding:0;list-style:none;display:grid}.steps li{border-bottom:1px dashed var(--line);grid-template-columns:minmax(150px,230px) 1fr;align-items:center;gap:.2rem .75rem;padding:.35rem 0;display:grid}.step-caption{color:var(--muted);font-size:.88rem}.step-note{color:var(--muted);grid-column:2;font-size:.85rem}.step-text{font-weight:500}@media (width<=700px){.steps li{grid-template-columns:1fr}.step-note{grid-column:1}}.tex{font-size:1.08em;overflow:auto hidden}.tex-block{padding:.15rem 0;display:block}.tex-block .katex-display{text-align:left;margin:.3rem 0}.tex-block .katex-display>.katex{text-align:left}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:.92rem}th,td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:.5rem .6rem}th{background:var(--bg);color:var(--ink-soft);font-size:.8rem;font-weight:600}tr.current td{background:var(--primary-soft)}tr.unseen td:not(:first-child){color:#94a3b8}.practice,.exam,.lab{gap:1rem;display:grid}.score{color:var(--primary);font-weight:700}.fields{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:.8rem;margin:.6rem 0;display:grid}.field{flex-direction:column;gap:.3rem;display:flex}.field-label{font-size:.9rem;font-weight:600}.input-unit{align-items:center;gap:.4rem;display:flex}.input-unit input{min-width:0;font:inherit;border:1.5px solid var(--line-strong);border-radius:var(--radius-md);flex:1;padding:.45rem .6rem;font-size:1.05rem}.field.right input{border-color:var(--good);background:var(--good-soft)}.field.sign input,.field.units input,.field.wrong input{border-color:var(--bad)}.unit{color:var(--muted);font-weight:600}.verdict{font-size:.85rem}.verdict.right{color:var(--good);font-weight:700}.verdict.wrong,.verdict.sign,.verdict.units{color:var(--bad)}.verdict.empty{color:#92400e}.nature{flex-direction:column;gap:.4rem;margin:.5rem 0;display:flex}.choice-row{flex-wrap:wrap;gap:.4rem;display:flex}.hint{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-md);margin-top:.6rem;padding:.6rem .8rem}.exam-top{grid-template-columns:1fr 1fr;gap:1rem;display:grid}@media (width<=800px){.exam-top{grid-template-columns:1fr}}.formula-list{gap:.5rem;margin:0;display:grid}.formula-list div{border-bottom:1px dashed var(--line);justify-content:space-between;align-items:center;gap:1rem;padding-bottom:.4rem;display:flex}.formula-list dt{color:var(--muted)}.formula-list dd{margin:0}.tips-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem;display:grid}.tips-grid h4{margin-top:0}.exam-questions{gap:1.1rem;margin:.6rem 0 0;padding-left:1.3rem;display:grid}.exam-q{border-bottom:1px solid var(--line);padding-bottom:1rem}.q-meta{flex-wrap:wrap;gap:.4rem;margin-bottom:.2rem;display:flex}.sim-link{flex-wrap:wrap;align-items:baseline;gap:.2rem .8rem;margin:.4rem 0;display:flex}.sim-link .muted{font-size:.88rem}.q-options{gap:.25rem;margin:0 0 .5rem;padding:0;list-style:none;display:grid}.reveal{margin-top:.5rem}.reveal-body{background:#f0fdf4;border-radius:10px;margin-top:.5rem;padding:.6rem .9rem}.record-head{grid-template-columns:140px 1fr;gap:.5rem 1rem;margin:0;display:grid}.record-head dt{font-weight:700}.record-head dd{margin:0}.record-head ol{margin:0;padding-left:1.2rem}.bench-grid{grid-template-columns:minmax(0,2fr) minmax(220px,1fr);align-items:center;gap:1rem;display:grid}.bench{background:#f8fafc;border-radius:10px;width:100%;height:auto;display:block}.window-frame{fill:#a16207}.sky{fill:#bae6fd}.scale-bar{fill:#fde68a;stroke:#b45309}.scale-tick{stroke:#78350f}.bench-label{text-anchor:middle;fill:#334155;font-size:15px}.bench-label.strong{fill:var(--primary);font-weight:700}.stand{stroke:#475569;stroke-width:4px}.screen{fill:#fff;stroke:#334155;stroke-width:2px}.screen-view{margin:0}.screen-view figcaption{margin-bottom:.3rem;font-size:.9rem;font-weight:600}.screen-view svg{border:3px solid #334155;border-radius:8px;width:100%;display:block}.screen-surface{fill:#fafaf9}.lab-columns{grid-template-columns:1fr 1fr;align-items:start;gap:1rem;display:grid}.result-line{font-weight:700}.viva{gap:.8rem;margin:0;padding-left:1.3rem;display:grid}@media (width<=800px){.record-head,.bench-grid,.lab-columns{grid-template-columns:1fr}.bench .bench-label{font-size:24px}.bench .bench-label.pos{display:none}}.book-app{flex-direction:column;height:100dvh;display:flex;overflow:hidden}.book-header{border-bottom:none;align-items:center;gap:.8rem;padding:.45rem 1rem;display:flex;position:static}.book-title{white-space:nowrap;text-overflow:ellipsis;flex:1;min-width:0;margin:0;font-size:1.02rem;overflow:hidden}@media (width<=700px){.book-header .brand-name{display:none}.book-title{font-size:.92rem}}.settings{position:relative}.settings summary{list-style:none}.settings summary::-webkit-details-marker{display:none}.settings[open] summary{background:var(--primary-soft);border-color:var(--primary-line);color:var(--primary-strong)}.icon-button{border:1px solid var(--line);color:var(--ink-soft);cursor:pointer;box-shadow:var(--shadow-xs);background:#fff;border-radius:11px;align-items:center;gap:.45rem;padding:.42rem .75rem;font-size:.92rem;font-weight:600;text-decoration:none;transition:border-color .15s,color .15s;display:inline-flex}.icon-button:hover{border-color:var(--primary-line);color:var(--primary-strong)}.account-link.signed-in{background:var(--navy);border-color:var(--navy);color:#fff}@media (width<=720px){.hide-narrow{display:none}}.settings-panel{z-index:40;border:1px solid var(--line);width:min(320px,100vw - 2rem);box-shadow:var(--shadow-lg);background:#fff;border-radius:16px;flex-direction:column;gap:.9rem;padding:1rem;display:flex;position:absolute;top:calc(100% + 8px);right:0}.settings-group{justify-items:start;gap:.4rem;display:grid}.settings-group p{margin:0;line-height:1.45}.book-bar{border-bottom:1px solid var(--line);background:#ffffffd1;padding:.45rem 1rem}.book-bar .tabs{margin:0}.tab-row{align-items:center;gap:.5rem;display:flex}.tab-row .tabs{flex:0 auto;min-width:0;margin-right:auto}.tab-row>:not(.tabs){white-space:nowrap}@media (width<=720px){.tab-row{flex-wrap:wrap}.tab-row .tabs{flex-basis:100%;margin-bottom:.25rem}}.modal-backdrop{z-index:50;background:#0f172a73;place-items:center;padding:1rem;display:grid;position:fixed;inset:0}.modal{background:#fff;border-radius:14px;width:min(460px,100%);max-height:calc(100vh - 2rem);padding:1.1rem 1.2rem;overflow:auto;box-shadow:0 20px 50px #0f172a4d}.modal h3{margin-top:0}.share-panel .qr{width:min(280px,70vw);margin:.5rem auto .8rem}.share-panel .qr svg{width:100%;height:auto;display:block}.share-link{box-sizing:border-box;border:1px solid var(--line);width:100%;color:var(--muted);border-radius:8px;margin-bottom:.6rem;padding:.45rem .6rem;font-size:.85rem}.book-main{flex:1;min-height:0;padding:.6rem}.book{gap:.6rem;height:100%;display:grid}.book.has-stage{grid-template-columns:minmax(0,1.35fr) minmax(0,1fr)}@media (aspect-ratio<=1){.book.has-stage{grid-template-rows:minmax(0,.9fr) minmax(0,1.1fr);grid-template-columns:minmax(0,1fr)}}.book-stage,.book-pager{border:1px solid var(--line);border-radius:var(--radius);background:#fff;min-height:0;overflow:hidden;box-shadow:0 1px 2px #0000000a}.book-stage{flex-direction:column;padding:.4rem;display:flex;position:relative}.book-stage>svg,.book-stage .stage-fill{flex:1;width:100%;height:100%;min-height:0}.book-stage .ray-diagram,.book-stage .molecule-viewer,.book-stage .lp-graph{height:100%}.stage-caption{pointer-events:none;justify-content:space-between;align-items:center;gap:.5rem;display:flex;position:absolute;top:.6rem;left:.8rem;right:.8rem}.stage-caption .mol-title{font-size:1.1rem}.stage-legend{flex:none;margin:.2rem .4rem 0}@media (width<=500px){.stage-legend{display:none}}.lab-stage{grid-template-columns:minmax(0,2fr) minmax(0,1fr);align-items:center;gap:.5rem;display:grid}.lab-stage svg{width:100%;height:100%;max-height:100%}@media (aspect-ratio<=1){.lab-stage{grid-template-rows:minmax(0,1fr) minmax(0,1fr);grid-template-columns:minmax(0,1fr)}}.book-pager{flex-direction:column;display:flex}.book-track-wrap{flex:1;min-height:0;padding:.9rem 1.1rem 0}.book-track{columns:1;column-fill:auto;column-rule:1px solid var(--line);touch-action:none;column-gap:2.4rem;height:100%;line-height:0;overflow:hidden}@media (width>=900px) and (aspect-ratio>=1){.book.no-stage .book-track{columns:2}}.book-section{vertical-align:top;width:100%;line-height:var(--lh);margin-bottom:1.1rem;display:inline-block;overflow:hidden}.book-section-inner{transform-origin:0 0}.book-section .card{box-shadow:none;background:0 0;border:none;padding:0}.book-nav{border-top:1px solid var(--line);background:#fafbff;align-items:center;gap:.5rem;padding:.45rem .6rem;display:flex}.book-nav .nav-btn{text-overflow:ellipsis;white-space:nowrap;flex:0 auto;max-width:38%;overflow:hidden}.book-dots{flex-wrap:wrap;flex:1;justify-content:center;align-items:center;gap:6px;display:flex}.book-dots button{background:#cbd5e1;border:none;border-radius:5px;width:10px;height:10px;padding:0;transition:width .2s}.book-dots button.active{background:var(--primary);width:22px}.book-count{text-align:center;width:100%;color:var(--muted);font-size:.75rem}@media (width<=500px){.book-dots button{display:none}}.book-section h3{margin-top:0}.continued-title{color:var(--muted);margin:0 0 .4rem;font-size:.85rem;font-weight:600}.lecture{flex:none;position:relative}.scroll-app .lecture-dock{z-index:20;position:fixed;bottom:0;left:0;right:0}.lesson-app{flex-direction:column;height:100dvh;display:flex;overflow:hidden}.lesson-main{flex:1;min-height:0;padding:.6rem .6rem .4rem;display:flex}.lesson-stage{flex:1;min-width:0}.lesson-main{position:relative}.lesson-main .pen-toggle{position:absolute;top:1rem;right:1rem}.pen-layer canvas{z-index:60;touch-action:none;cursor:crosshair;width:100vw;height:100vh;position:fixed;inset:0}.pen-tools{z-index:61;border:1px solid var(--line);background:#fff;border-radius:999px;align-items:center;gap:.4rem;padding:.4rem .6rem;display:flex;position:fixed;top:.6rem;left:50%;transform:translate(-50%);box-shadow:0 8px 24px #0f172a33}.pen-color{width:1.8rem;height:1.8rem;box-shadow:0 0 0 1px var(--line);border:3px solid #fff;border-radius:50%;padding:0}.pen-color.active{box-shadow:0 0 0 3px var(--ink)}.lecture-seek{border-top:1px solid var(--line);background:#fff;align-items:center;gap:.6rem;padding:.4rem .9rem 0;display:flex}.lecture-seek input{min-width:0;accent-color:var(--primary);flex:1;height:28px}.lecture-time{font-variant-numeric:tabular-nums;color:var(--muted);font-size:.85rem}.lecture-seek+.lecture-bar{box-shadow:none;border-top:none}.lecture-exit{align-items:center;gap:.25rem;display:inline-flex}.page.with-lecture{padding-bottom:5.5rem}.lecture-bar{border-top:1px solid var(--line);background:#fff;align-items:center;gap:.5rem;padding:.45rem .9rem;display:flex;box-shadow:0 -4px 14px #0f172a0f}.lecture-play{border-radius:999px;align-items:center;gap:.4rem;padding:.45rem 1rem;font-weight:600;display:inline-flex}.lecture-info{cursor:pointer;flex-direction:column;flex:1;min-width:0;line-height:1.3;display:flex}.lecture-title{white-space:nowrap;text-overflow:ellipsis;font-weight:600;overflow:hidden}.icon-btn{color:var(--ink);background:0 0;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;padding:.3rem .4rem;display:inline-flex}.icon-btn:hover{background:#f1f5f9}.icon-btn.text{border-color:var(--line);min-width:2.5rem;font-size:.8rem;font-weight:700}.icon-btn.text.on{background:var(--primary-soft);border-color:var(--primary);color:var(--primary)}.lecture-caption{color:#fff;text-align:center;background:#0f172ae6;border-radius:10px;justify-content:center;align-items:center;min-height:calc(2.8em + 1rem);margin:0 .6rem .5rem;padding:.5rem 1rem;font-size:1.02rem;line-height:1.4;display:flex}.lecture-menu{z-index:30;border:1px solid var(--line);background:#fff;border-radius:12px;width:min(390px,100% - 24px);max-height:65vh;padding:.5rem;position:absolute;bottom:calc(100% + 8px);right:12px;overflow:auto;box-shadow:0 12px 30px #0f172a2e}.lecture-menu-title{margin:.2rem .5rem .4rem;font-weight:700}.lecture-menu-help{margin:0 .5rem .5rem}.install{flex-wrap:wrap;align-items:center;gap:.4rem .8rem;margin-top:.8rem;display:flex}.lecture-offline{border-top:1px solid var(--line);margin:.5rem .5rem .2rem;padding-top:.6rem;font-size:.9rem}.good-text{color:var(--good);font-weight:600}.lecture-item{border-radius:8px;flex-wrap:wrap;align-items:center;gap:.35rem .6rem;width:100%;padding:.5rem .6rem;display:flex}.lecture-name{flex:9rem;min-width:0}.lecture-lengths{gap:.35rem;margin-left:auto;display:inline-flex}.lecture-length{font-variant-numeric:tabular-nums;padding:.2rem .6rem;font-size:.8rem}.lecture-version button{padding:.3rem .7rem;font-size:.85rem}.lecture-play.waiting{animation:1.4s ease-in-out infinite hl-pulse}.think-hint{color:#b45309;font-weight:700}.lecture-item:hover,.lecture-item.active{background:var(--primary-soft)}.lecture-num{background:var(--primary);color:#fff;border-radius:50%;flex:none;place-items:center;width:1.6rem;height:1.6rem;font-size:.8rem;display:grid}@media (width<=600px){.lecture-bar{flex-wrap:wrap;gap:.25rem;padding:.4rem .5rem}.lecture-seek+.lecture-bar .lecture-info{flex:calc(100% - 9.5rem);order:-2}.lecture-exit{order:-1}.lecture-lessons{display:none}.icon-btn.text{min-width:2.1rem}.lecture-caption{min-height:calc(4.2em + 1rem);font-size:.95rem}}.guide-focus{z-index:40;outline:3px solid var(--primary);outline-offset:4px;position:relative;box-shadow:0 0 0 9999px #0f172a59}.guide-card{z-index:50;border-radius:var(--radius);background:#fff;width:min(520px,100% - 24px);padding:1rem 1.2rem;position:fixed;bottom:20px;left:50%;transform:translate(-50%);box-shadow:0 12px 40px #0f172a4d}.guide-step{color:var(--primary);text-transform:uppercase;letter-spacing:.04em;font-size:.8rem;font-weight:700}.guide-card p{font-size:1.05rem}.guide-actions{justify-content:space-between;align-items:center;margin-top:.6rem;display:flex}.worksheet{max-width:820px;margin:0 auto;padding:1rem}.sheet{border:1px solid var(--line);background:#fff;border-radius:8px;margin-top:1rem;padding:2rem}.sheet h1{margin:0;font-size:1.4rem}.name-line{margin:1rem 0}.sheet-questions li{margin-bottom:.4rem}.answer-space{border-bottom:1px dashed #cbd5e1;margin-bottom:.8rem}.answer-space.large{height:130px}.answer-space.small{height:24px}.sheet-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:.2rem 1rem;margin:.3rem 0;display:grid}.sheet-answers{gap:.4rem;display:grid}.sheet.daily{max-width:760px;margin-inline:auto}.sheet.daily h2{margin:1rem 0 .6rem}.daily-formula .katex-display{margin:1rem 0;font-size:1.35em}.sheet.lesson-plan{margin-bottom:1.5rem}.lesson-plan h2{margin:1rem 0 .4rem;font-size:1.05rem}.plan-table{border-collapse:collapse;width:100%;margin-top:.8rem}.plan-table th,.plan-table td{text-align:left;vertical-align:top;border:1px solid #cbd5e1;padding:.45rem .6rem}.plan-table th{background:#f1f5f9}.plan-time{white-space:nowrap;width:4.5rem;font-weight:700}.plan-open{margin-top:.3rem;font-weight:600;display:block}@media print{.sheet.lesson-plan{break-after:page;font-size:10pt}.sheet.lesson-plan:last-child{break-after:auto}}.notes{gap:1rem;display:grid}.definitions{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));align-items:start;gap:.9rem;display:grid}.definition{border:1.5px solid var(--line);border-radius:12px;padding:.8rem .9rem}.definition h4{align-items:center;gap:.5rem;margin:0 0 .4rem;display:flex}.definition-text{margin:0 0 .4rem;font-weight:500}.note-figure{max-width:560px;margin-top:.6rem}.note-figure .stage-legend{display:none}.note-section{border-top:1px solid var(--line);grid-template-columns:minmax(0,1fr) minmax(0,460px);align-items:start;gap:0 1.2rem;margin-top:.8rem;padding-top:.8rem;display:grid}.note-section h4{grid-column:1/-1;margin:0 0 .4rem}.note-section .note-figure{margin-top:0}@media (width<=860px){.note-section{grid-template-columns:1fr}}.notes-page .definition+.definition{margin-top:.8rem}.notes-page .note-section{border-top:none;grid-template-columns:1fr;margin-top:0;padding-top:0}.bank-group{color:var(--primary);margin:1.2rem 0 .4rem}@media print{.definition,.note-section,.exam-q{break-inside:avoid}}.account{align-content:start;gap:1rem;display:grid}.account>.button{justify-self:start}.account-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));align-items:start;gap:1rem;display:grid}.account-form,.poll-form{gap:.8rem;display:grid}.account-form h2{margin:0}.account-form label,.poll-form label{gap:.25rem;display:grid}.account input,.account select,.account textarea{border:1.5px solid var(--line);font:inherit;background:#fff;border-radius:8px;padding:.5rem .7rem}.account .grow{flex:1;min-width:12rem}.account-form .link{justify-self:start}.class-list{gap:.5rem;margin:0 0 1rem;padding:0;list-style:none;display:grid}.class-list a{border:1.5px solid var(--line);color:inherit;border-radius:10px;flex-wrap:wrap;justify-content:space-between;gap:.5rem;padding:.7rem .9rem;text-decoration:none;display:flex}.class-list a:hover{border-color:var(--primary)}.join-card{grid-template-columns:180px 1fr;align-items:center;gap:1.2rem;display:grid}.join-card h1{margin:0}.join-code{letter-spacing:.25em;color:var(--primary);margin:.2rem 0;font-size:2.6rem;font-weight:800}.join-card a{word-break:break-all}@media (width<=600px){.join-card{grid-template-columns:1fr}.join-card .qr{max-width:200px}}.table-scroll{overflow-x:auto}.results-table{border-collapse:collapse;width:100%;font-size:.92rem}.results-table th,.results-table td{border-bottom:1px solid var(--line);text-align:left;vertical-align:top;padding:.5rem .6rem}.pin-input{width:9rem}.poll-options{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.6rem;display:grid}.poll-results{gap:.5rem;display:grid}.poll-results .question{font-size:1.15rem}.poll-bar{border:1.5px solid var(--line);border-radius:10px;justify-content:space-between;gap:1rem;padding:.6rem .8rem;display:flex;position:relative;overflow:hidden}.poll-bar-fill{background:var(--primary-soft);transition:width .4s;position:absolute;inset:0 auto 0 0}.poll-bar.correct{border-color:var(--good)}.poll-bar.correct .poll-bar-fill{background:var(--good-soft)}.poll-bar-text,.poll-bar-count{position:relative}.student-poll{z-index:60;border:2px solid var(--primary);width:min(560px,100vw - 1.5rem);max-height:80vh;position:fixed;bottom:1rem;left:50%;overflow-y:auto;transform:translate(-50%);box-shadow:0 12px 40px #0f172a40}.poll-pill{z-index:60;position:fixed;bottom:1rem;right:1rem;box-shadow:0 8px 24px #0f172a40}.teacher-links{color:var(--muted);margin:.6rem 0 0}.paper-form{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.8rem;display:grid}.paper-form label{gap:.25rem;display:grid}.paper-form input,.paper-marks-input input{border:1.5px solid var(--line);font:inherit;border-radius:8px;padding:.4rem .6rem}.paper-pool{gap:.4rem;margin:.8rem 0 0;padding:0;list-style:none;display:grid}.paper-pool li{border:1.5px solid var(--line);border-radius:10px;align-items:flex-start;gap:.8rem;padding:.5rem .7rem;display:flex}.paper-pool li.chosen{border-color:var(--primary);background:var(--primary-soft)}.paper-pick{cursor:pointer;flex:1;gap:.6rem;display:flex}.paper-pick input{margin-top:.3rem}.paper-marks-input{gap:.2rem;display:grid}.paper-marks-input input{width:4.5rem}.sheet.paper h1{text-align:center;margin-bottom:.2rem}.sheet.paper>p{text-align:center;margin:.2rem 0}.paper-school{font-size:1.1rem;font-weight:700}.paper-meta{border-bottom:1.5px solid #334155;justify-content:space-between;padding-bottom:.4rem;font-weight:600}.sheet.paper h2{margin:1rem 0 .5rem;font-size:1rem}.paper-instructions{margin:0;padding-left:1.3rem}.paper-q{break-inside:avoid;grid-template-columns:2rem 1fr 2rem;gap:.3rem;margin-bottom:.7rem;display:grid}.paper-q p{margin:0}.paper-n{font-weight:700}.paper-marks{text-align:right;font-weight:700}.paper-answer{border-bottom:1px dashed var(--line);break-inside:avoid;padding:.4rem 0 .6rem}.paper-answer p{margin:.2rem 0}.revision-sheet h2{margin:0 0 .3rem;font-size:1.05rem}.revision-grid{grid-template-columns:1fr 1fr;gap:.8rem 1.4rem;display:grid}.revision-grid section{break-inside:avoid}.revision-grid ul{gap:.2rem;margin:0;padding-left:1.1rem;display:grid}.revision-sheet .formula-list div{flex-direction:column;align-items:flex-start;gap:.1rem}.revision-sheet .formula-list dd{white-space:nowrap}.revision-figure{grid-column:1/-1}.revision-figure svg{width:100%;height:auto;max-height:260px;margin:0 auto;display:block}.revision-table{border-collapse:collapse;width:100%;margin-top:.4rem;font-size:.85rem}.revision-table th,.revision-table td{text-align:left;border:1px solid #cbd5e1;padding:.25rem .4rem}.revision-table th{background:#f1f5f9}@media (width<=700px){.revision-grid{grid-template-columns:1fr}}@media print{.revision-sheet{font-size:9.5pt;line-height:1.3}.revision-sheet h1{margin:0;font-size:13pt}.revision-sheet h2{margin-bottom:.15rem;font-size:9.5pt}.revision-sheet>p{margin:.1rem 0 .4rem}.revision-grid{gap:.45rem 1rem}.revision-grid ul{gap:.05rem}.revision-sheet .formula-list>div{padding:.1rem 0}.revision-figure svg{max-height:250px}.revision-table{margin-top:.2rem;font-size:8pt}.revision-table th,.revision-table td{padding:.1rem .3rem}}@keyframes hl-pulse{0%,to{opacity:.4}50%{opacity:.95}}.hl line,.hl path,.hl-line,.hl-bond{fill:none;stroke:#facc15;stroke-linecap:round;stroke-linejoin:round;animation:1.4s ease-in-out infinite hl-pulse}.hl line,.hl path{stroke-width:18px}.hl circle{fill:#facc15;animation:1.4s ease-in-out infinite hl-pulse}.hl-line{stroke-width:14px}.hl-ring,.lp-graph .corner circle.hl-ring,.lp-graph .plan-point circle.hl-ring{fill:none;stroke:#f59e0b;stroke-width:5px;animation:1.4s ease-in-out infinite hl-pulse}.hl-ring.axial{stroke:#0284c7}.lone-pair.marked ellipse{stroke:#ea580c;stroke-width:5px;animation:1.4s ease-in-out infinite hl-pulse}.angle-mark.marked polyline{stroke:#ea580c;stroke-width:4.5px;stroke-dasharray:none}.angle-mark.marked text{fill:#c2410c;font-size:22px}.callout{fill:#0f172a;paint-order:stroke;stroke:#fff;stroke-width:5px;stroke-linejoin:round;font-size:18px;font-weight:700}.callout.sign{font-size:28px}.dim line{stroke:#0f172a;stroke-width:2px}.dim polygon{fill:#0f172a}.dipole line{stroke:#7c3aed;stroke-width:3px}.dipole polygon{fill:#7c3aed}.net-dipole line{stroke:#dc2626;stroke-width:6px}.net-dipole polygon{fill:#dc2626}.lp-graph .shade{fill-opacity:.16}.lp-graph .region.marked{stroke-width:4px;animation:1.4s ease-in-out infinite hl-pulse}.lp-graph .plan-point circle{fill:#0f172a}.lp-graph .plan-point.ok circle{fill:#16a34a}.lp-graph .plan-point.bad circle{fill:#dc2626}.lp-graph .plan-point text{fill:#0f172a;paint-order:stroke;stroke:#fff;stroke-width:4px;font-size:15px;font-weight:700}.lp-graph .plan-point.ok text{fill:#15803d}.lp-graph .plan-point.bad text{fill:#b91c1c}@media (width<=700px){.callout{font-size:28px}.callout.sign{font-size:38px}.angle-mark.marked text{font-size:30px}.lp-graph .plan-point text{font-size:22px}}.board{background:#fffbeb;border:1px solid #fde68a;border-left:4px solid #f59e0b;border-radius:10px;flex-wrap:wrap;align-items:center;gap:.3rem .9rem;margin-top:.5rem;padding:.4rem .7rem;font-size:1.1rem;display:flex}.board-line{border-radius:6px;padding:.1rem .35rem;animation:.5s both fade}.board-line.latest{background:#fef08a}.book-stage .board{flex:none;margin:.3rem .3rem 0}@media (aspect-ratio<=1){.board{font-size:.9rem}.board-line:nth-last-child(n+4){display:none}}@media print{.no-print{display:none!important}body{background:#fff}.worksheet{padding:0}.sheet{border:none;margin:0;padding:0}.page-break{break-before:page}.sheet-questions li{break-inside:avoid}}