@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";@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,Times New Roman,serif}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.16.38"}.katex .katex-mathml{clip:rect(1px,1px,1px,1px);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.newline{display:block}.katex .base{white-space:nowrap;width:min-content;position:relative}.katex .base,.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 .vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{flex-direction:row;display:inline-flex}.katex .thinbox{width:0;max-width:0}.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 .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.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 .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.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 .stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .stretchy:after,.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 .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 .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>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}pre code.hljs{padding:1em;display:block;overflow-x:auto}code.hljs{padding:3px 5px}.hljs{color:#c9d1d9;background:#0d1117}.hljs-doctag,.hljs-keyword,.hljs-meta .hljs-keyword,.hljs-template-tag,.hljs-template-variable,.hljs-type,.hljs-variable.language_{color:#ff7b72}.hljs-title,.hljs-title.class_,.hljs-title.class_.inherited__,.hljs-title.function_{color:#d2a8ff}.hljs-attr,.hljs-attribute,.hljs-literal,.hljs-meta,.hljs-number,.hljs-operator,.hljs-variable,.hljs-selector-attr,.hljs-selector-class,.hljs-selector-id{color:#79c0ff}.hljs-regexp,.hljs-string,.hljs-meta .hljs-string{color:#a5d6ff}.hljs-built_in,.hljs-symbol{color:#ffa657}.hljs-comment,.hljs-code,.hljs-formula{color:#8b949e}.hljs-name,.hljs-quote,.hljs-selector-tag,.hljs-selector-pseudo{color:#7ee787}.hljs-subst{color:#c9d1d9}.hljs-section{color:#1f6feb;font-weight:700}.hljs-bullet{color:#f2cc60}.hljs-emphasis{color:#c9d1d9;font-style:italic}.hljs-strong{color:#c9d1d9;font-weight:700}.hljs-addition{color:#aff5b4;background-color:#033a16}.hljs-deletion{color:#ffdcd7;background-color:#67060c}:root{--font:"Inter", system-ui, sans-serif;--bg:#f7f6f3;--surface:#fff;--surface-alt:#f0ede8;--surface-glass:#ffffffb8;--border:#e8e4de;--border-light:#0000000f;--accent:#2d2d2f;--accent-hover:#1c1c1e;--accent-light:#2d2d2f0f;--accent-glow:#2d2d2f26;--text-primary:#1c1c1e;--text-secondary:#6b6b6b;--text-muted:#a3a3a3;--radius:20px;--radius-sm:12px;--radius-xs:8px;--sidebar-w:280px;--shadow-sm:0 1px 3px #0000000a, 0 1px 2px #0000000f;--shadow-md:0 4px 16px #0000000f, 0 1px 4px #0000000a;--shadow-lg:0 12px 40px #0000001a, 0 2px 8px #0000000a;--ease-spring:cubic-bezier(.34,1.56,.64,1);--ease-out:cubic-bezier(.25,.46,.45,.94)}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--keyboard-offset:0px}body{font-family:var(--font);background:var(--bg);color:var(--text-primary);overflow:hidden}.app{height:100dvh;display:flex;overflow:hidden}.sidebar{width:var(--sidebar-w);background:var(--surface);border-right:1px solid var(--border);transition:transform .35s var(--ease-out);flex-direction:column;flex-shrink:0;display:flex}.sidebar-header{border-bottom:1px solid var(--border-light);justify-content:space-between;align-items:center;padding:18px 16px;display:flex}.logo{letter-spacing:-.02em;align-items:center;gap:10px;font-size:18px;font-weight:700;display:flex}.logo-icon{font-size:24px}.sidebar-chats{scrollbar-width:thin;scrollbar-color:var(--border) transparent;flex:1;padding:8px;overflow-y:auto}.chat-item{border-radius:var(--radius-xs);cursor:pointer;transition:all .2s var(--ease-out);border:1px solid #0000;justify-content:space-between;align-items:center;gap:8px;padding:10px 12px;display:flex}.chat-item:hover{background:var(--surface-alt)}.chat-item.active{background:var(--accent-light);border-color:var(--accent)}.chat-title{text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:13px;overflow:hidden}.sidebar-footer{border-top:1px solid var(--border-light);padding:12px 16px}.sidebar-overlay{display:none}.user-section{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.user-info{align-items:center;gap:8px;display:flex}.user-avatar{color:#fff;background:linear-gradient(135deg,#2d2d2f 0%,#48484a 100%);border-radius:50%;justify-content:center;align-items:center;width:30px;height:30px;font-size:13px;font-weight:600;display:flex;box-shadow:0 2px 8px #0000001f}.user-name{font-size:13px;font-weight:500}.user-actions{gap:2px;display:flex}.btn-auth{background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;width:100%;font-family:var(--font);color:var(--text-primary);transition:all .25s var(--ease-out);align-items:center;gap:8px;padding:10px 14px;font-size:14px;display:flex}.btn-auth:hover{background:var(--accent-light);border-color:var(--accent);box-shadow:var(--shadow-sm);transform:translateY(-1px)}.status-bar{color:var(--text-muted);align-items:center;gap:6px;margin-top:8px;font-size:11px;display:flex}.status-dot{background:#ccc;border-radius:50%;width:7px;height:7px;transition:background .3s}.status-dot.online{background:#22c55e;box-shadow:0 0 6px #22c55e66}.btn-icon{cursor:pointer;border-radius:var(--radius-xs);color:var(--text-secondary);transition:all .2s var(--ease-out);background:0 0;border:none;justify-content:center;align-items:center;padding:6px;font-size:20px;display:flex}.btn-icon:hover{background:var(--surface-alt);color:var(--text-primary);transform:scale(1.05)}.btn-icon:active{transform:scale(.95)}.btn-ghost{cursor:pointer;color:var(--text-secondary);background:0 0;border:none;border-radius:6px;padding:4px 6px;font-size:16px;transition:all .15s}.btn-ghost:hover{background:var(--surface-alt)}.btn-xs{cursor:pointer;background:0 0;border:none;border-radius:4px;padding:2px;font-size:13px;transition:background .15s}.btn-xs:hover{background:var(--surface-alt)}.btn-danger:hover{background:#fef2f2}.btn-primary{color:#fff;border-radius:var(--radius-sm);width:100%;font-family:var(--font);cursor:pointer;transition:all .25s var(--ease-out);background:linear-gradient(135deg,#2d2d2f 0%,#48484a 100%);border:none;padding:12px;font-size:15px;font-weight:600;box-shadow:0 2px 8px #0000001f}.btn-primary:hover{box-shadow:0 4px 16px var(--accent-glow);transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.btn-sm{width:auto;padding:8px 14px;font-size:13px}.chat-main{flex-direction:column;flex:1;min-width:0;display:flex;position:relative}.chat-header{border-bottom:1px solid var(--border-light);background:var(--surface-glass);-webkit-backdrop-filter:blur(20px)saturate(1.5);z-index:5;align-items:center;gap:12px;padding:14px 20px;display:flex;position:relative}.chat-header h1{font-size:18px;font-weight:600}.menu-btn{display:none}.chat-messages{scroll-behavior:smooth;scrollbar-width:thin;scrollbar-color:var(--border) transparent;flex:1;padding:24px 20px;overflow-y:auto}.welcome{text-align:center;max-width:560px;animation:welcomeFadeIn .8s var(--ease-out) both;margin:0 auto;padding:60px 20px}@keyframes welcomeFadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}.welcome-icon{margin-bottom:16px;font-size:56px}.welcome-icon img{box-shadow:var(--shadow-md);transition:transform .3s var(--ease-spring);border-radius:20px}.welcome-icon img:hover{transform:scale(1.08)rotate(-2deg)}.welcome h2{letter-spacing:-.03em;background:linear-gradient(135deg,#1c1c1e 30%,#48484a);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:8px;font-size:30px;font-weight:700}.welcome p{color:var(--text-secondary);margin-bottom:32px;font-size:15px}.capabilities{grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:28px;display:grid}.cap-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all .3s var(--ease-spring);text-align:center;flex-direction:column;align-items:center;gap:8px;padding:20px 12px;display:flex;position:relative;overflow:hidden}.cap-card:before{content:"";background:linear-gradient(135deg, var(--accent-light), transparent);opacity:0;transition:opacity .3s;position:absolute;inset:0}.cap-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:0 8px 24px #c49a3c1f}.cap-card:hover:before{opacity:1}.cap-card:active{transform:translateY(-2px)scale(.98)}.cap-icon-wrap{width:44px;height:44px;color:var(--accent);z-index:1;transition:all .3s var(--ease-spring);background:linear-gradient(135deg,#2d2d2f14 0%,#48484a1a 100%);border-radius:12px;justify-content:center;align-items:center;display:flex;position:relative}.cap-card:hover .cap-icon-wrap{color:#fff;background:linear-gradient(135deg,#2d2d2f 0%,#48484a 100%);transform:scale(1.1)}.cap-icon{z-index:1;font-size:28px;position:relative}.cap-title{z-index:1;font-size:13px;font-weight:600;position:relative}.cap-desc{color:var(--text-muted);z-index:1;font-size:11px;position:relative}.starters{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px;display:grid}.starter-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;font-family:var(--font);text-align:left;transition:all .25s var(--ease-spring);color:var(--text-primary);align-items:center;gap:10px;padding:14px 16px;font-size:13px;display:flex}.starter-card:hover{border-color:var(--accent);background:var(--accent-light);box-shadow:var(--shadow-sm);transform:translateY(-2px)}.starter-card:active{transform:translateY(0)scale(.98)}.starter-icon{flex-shrink:0;font-size:20px}.chat-title-group{flex-direction:column;display:flex}.chat-title-group h1{letter-spacing:-.02em;font-size:16px;font-weight:700}.header-subtitle{color:var(--text-muted);font-size:11px;font-weight:400}.message{animation:msgSlideIn .4s var(--ease-out) both;gap:12px;margin-bottom:20px;display:flex}@keyframes msgSlideIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}.message.user{flex-direction:row-reverse}.msg-avatar{width:34px;height:34px;transition:transform .2s var(--ease-spring);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex;overflow:hidden}.message.user .msg-avatar{background:linear-gradient(135deg,#2d2d2f,#48484a);box-shadow:0 2px 8px #0000001f}.message.assistant .msg-avatar{background:var(--surface-alt)}.message:hover .msg-avatar{transform:scale(1.1)}.msg-content{max-width:72%;position:relative}.msg-bubble{border-radius:var(--radius);word-wrap:break-word;padding:14px 18px;font-size:14px;line-height:1.7;transition:box-shadow .2s}.message.user .msg-bubble{color:#fff;background:linear-gradient(135deg,#2d2d2f 0%,#3a3a3c 100%);border-bottom-right-radius:6px;box-shadow:0 2px 12px #0000001f}.message.user .msg-bubble:hover{box-shadow:0 4px 20px #0000002e}.message.assistant .msg-bubble{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-bottom-left-radius:6px}.message.assistant .msg-bubble:hover{box-shadow:var(--shadow-md)}.msg-image-preview{border-radius:10px;max-width:280px;margin-bottom:8px;animation:.3s fadeIn;overflow:hidden}.msg-image-preview img{width:100%;height:auto;transition:transform .2s var(--ease-spring);border-radius:10px;display:block}.msg-image-preview img:hover{transform:scale(1.03)}.msg-bubble h1,.msg-bubble h2,.msg-bubble h3{margin:12px 0 6px;font-weight:600}.msg-bubble h1{font-size:17px}.msg-bubble h2{font-size:15px}.msg-bubble h3{font-size:14px}.msg-bubble p{margin:5px 0}.msg-bubble ul,.msg-bubble ol{margin:5px 0;padding-left:18px}.msg-bubble li{margin:2px 0}.msg-bubble blockquote{border-left:3px solid var(--accent);color:var(--text-secondary);background:var(--accent-light);border-radius:0 var(--radius-xs) var(--radius-xs) 0;margin:8px 0;padding:4px 12px}.msg-bubble a{color:var(--accent);text-underline-offset:2px;text-decoration:underline}.msg-bubble table{border-collapse:collapse;width:100%;margin:8px 0;font-size:13px}.msg-bubble th,.msg-bubble td{border:1px solid var(--border);text-align:left;padding:6px 10px}.msg-bubble th{background:var(--surface-alt);font-weight:600}.inline-code{background:var(--surface-alt);border-radius:5px;padding:2px 6px;font-family:SF Mono,Fira Code,monospace;font-size:13px}.code-block{border-radius:var(--radius-sm);margin:8px 0;position:relative;overflow:hidden}.code-block pre{background:#0d1117;margin:0;padding:16px 18px;overflow-x:auto}.code-block pre code{color:#e6edf3;background:0 0;padding:0;font-family:SF Mono,Fira Code,monospace;font-size:13px;line-height:1.5}.code-header{background:#161b22;justify-content:flex-end;padding:4px 8px;display:flex}.copy-btn{color:#8b949e;cursor:pointer;font-size:11px;font-family:var(--font);transition:all .2s var(--ease-out);background:#ffffff0f;border:1px solid #ffffff1a;border-radius:6px;align-items:center;gap:4px;padding:4px 10px;display:inline-flex}.copy-btn:hover{color:#fff;background:#ffffff1f;transform:translateY(-1px)}.msg-actions{opacity:0;transition:all .25s var(--ease-out);gap:6px;margin-top:6px;display:flex;transform:translateY(4px)}.message:hover .msg-actions{opacity:1;transform:none}.msg-actions .copy-btn{background:var(--surface);border-color:var(--border);color:var(--text-muted);border-radius:var(--radius-xs);padding:5px 10px}.msg-actions .copy-btn:hover{border-color:var(--accent);color:var(--accent)}.tts-btn{background:var(--surface);border:1px solid var(--border);color:var(--text-muted);border-radius:var(--radius-xs);cursor:pointer;transition:all .25s var(--ease-out);align-items:center;gap:4px;padding:5px 10px;font-size:12px;display:inline-flex}.tts-btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}.tts-btn.playing{color:var(--accent);border-color:var(--accent);background:var(--accent-light);animation:2s ease-in-out infinite ttsGlow}@keyframes ttsGlow{0%,to{box-shadow:0 0 0 0 var(--accent-glow)}50%{box-shadow:0 0 12px 2px var(--accent-glow)}}@keyframes spin{to{transform:rotate(360deg)}}.spin{animation:.8s linear infinite spin}.msg-bubble .katex-display{margin:4px 0;padding:8px 0;overflow:auto hidden}.msg-bubble .katex{font-size:1.1em}.msg-bubble .katex-display>.katex{font-size:1.15em}.msg-bubble .katex-html{white-space:nowrap}.edit-form textarea{border:1.5px solid var(--accent);border-radius:var(--radius-sm);width:100%;font-family:var(--font);background:var(--surface);color:var(--text-primary);resize:vertical;outline:none;min-height:60px;padding:10px 12px;font-size:14px}.edit-form textarea:focus{box-shadow:0 0 0 3px var(--accent-glow)}.edit-actions{gap:8px;margin-top:8px;display:flex}.btn-cancel{background:var(--surface-alt);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;font-size:13px;font-family:var(--font);color:var(--text-secondary);padding:8px 14px;transition:all .2s}.btn-cancel:hover{background:var(--border)}.typing{align-items:center;gap:5px;padding:16px;display:flex}.typing span{background:linear-gradient(135deg,#2d2d2f 0%,#48484a 100%);border-radius:50%;width:8px;height:8px;animation:1.4s infinite both typingBounce}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}@keyframes typingBounce{0%,80%,to{opacity:.4;transform:scale(.6)}40%{opacity:1;transform:scale(1)}}.doc-preview{background:var(--surface);border:1px solid var(--accent);border-radius:var(--radius-sm);max-width:400px;box-shadow:0 2px 8px var(--accent-glow);animation:slideUp .3s var(--ease-spring) both;align-items:center;gap:10px;margin:0 20px 8px;padding:12px 16px;display:flex;position:relative}.doc-icon{font-size:20px}.doc-name{text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:13px;font-weight:600;overflow:hidden}.doc-size{color:var(--text-muted);flex-shrink:0;font-size:11px}.doc-preview .remove-image{color:var(--text-muted);background:0 0;width:20px;height:20px;font-size:18px;line-height:20px;position:static}.doc-preview .remove-image:hover{color:#dc2626}.emotion-badge{border-radius:var(--radius-sm);color:#92400e;animation:slideUp .35s var(--ease-spring) both;background:linear-gradient(135deg,#fef3c7,#fde68a);border:1px solid #f59e0b;align-items:center;gap:10px;margin:0 20px 8px;padding:10px 16px;font-size:13px;display:flex;box-shadow:0 2px 12px #f59e0b26}.emotion-emoji{font-size:22px}.emotion-dismiss{color:#92400e;cursor:pointer;opacity:.6;background:0 0;border:none;margin-left:auto;padding:0 4px;font-size:18px;transition:all .2s}.emotion-dismiss:hover{opacity:1;transform:scale(1.2)}@keyframes slideUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.image-preview{border-radius:var(--radius-sm);border:2px solid var(--accent);max-width:200px;box-shadow:0 4px 16px var(--accent-glow);animation:slideUp .3s var(--ease-spring) both;transition:transform .2s var(--ease-spring);margin:0 20px 8px;display:inline-block;position:relative;overflow:hidden}.image-preview:hover{transform:scale(1.03)}.image-preview img{object-fit:cover;width:100%;height:auto;max-height:160px;display:block}.remove-image{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);color:#fff;text-align:center;cursor:pointer;width:26px;height:26px;transition:all .2s var(--ease-out);opacity:0;background:#0009;border:none;border-radius:50%;font-size:16px;line-height:26px;position:absolute;top:6px;right:6px}.image-preview:hover .remove-image{opacity:1}.remove-image:hover{background:#dc2626;transform:scale(1.1)}.chat-main.dragging{position:relative}.drag-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:3px dashed var(--accent);border-radius:var(--radius);z-index:10;background:#f7f6f3eb;justify-content:center;align-items:center;animation:.2s both fadeIn;display:flex;position:absolute;inset:0}.drag-content{text-align:center;color:var(--accent)}.drag-content svg{margin-bottom:12px;animation:2s ease-in-out infinite dragFloat}@keyframes dragFloat{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.drag-content p{font-size:16px;font-weight:600}.chat-input-area{background:linear-gradient(180deg, transparent 0%, var(--bg) 20%);padding:12px 20px 16px;position:relative}.input-wrapper{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);transition:all .3s var(--ease-out);box-shadow:var(--shadow-sm);align-items:flex-end;gap:4px;padding:6px;display:flex}.input-wrapper:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow), var(--shadow-md)}.input-wrapper textarea{resize:none;font-family:var(--font);color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;max-height:150px;padding:8px 6px;font-size:14px;line-height:1.5}.input-hint{text-align:center;color:var(--text-muted);opacity:.7;margin-top:8px;font-size:11px}.attach-btn,.voice-btn{border-radius:var(--radius-xs);width:38px;height:38px;color:var(--text-muted);cursor:pointer;transition:all .25s var(--ease-out);background:0 0;border:none;flex-shrink:0;justify-content:center;align-items:center;display:flex}.attach-btn:hover,.voice-btn:hover{color:var(--accent);background:var(--accent-light);transform:scale(1.08)}.attach-btn:active,.voice-btn:active{transform:scale(.92)}.voice-btn.recording{color:#dc2626;animation:pulseRecord 1.5s var(--ease-out) infinite;background:#fef2f2}@keyframes pulseRecord{0%,to{box-shadow:0 0 #dc26264d}50%{box-shadow:0 0 0 10px #dc262600}}.send-btn{border-radius:var(--radius-sm);color:#fff;cursor:pointer;width:40px;height:40px;transition:all .25s var(--ease-spring);background:linear-gradient(135deg,#2d2d2f 0%,#48484a 100%);border:none;flex-shrink:0;justify-content:center;align-items:center;display:flex;box-shadow:0 2px 8px #0000001f}.send-btn:hover{transform:scale(1.08);box-shadow:0 4px 16px #0000002e}.send-btn:active{transform:scale(.92)}.send-btn:disabled{opacity:.3;cursor:not-allowed;box-shadow:none;transform:none}.modal-overlay{-webkit-backdrop-filter:blur(8px)saturate(1.2);z-index:100;background:#00000059;justify-content:center;align-items:center;width:100%;height:100%;animation:.2s both fadeIn;display:flex;position:fixed;top:0;left:0}.modal{background:var(--bg);border-radius:var(--radius);width:90%;max-width:400px;box-shadow:var(--shadow-lg);animation:modalIn .35s var(--ease-spring) both;padding:28px}@keyframes modalIn{0%{opacity:0;transform:scale(.95)translateY(10px)}to{opacity:1;transform:none}}.modal-wide{max-width:520px}.modal-header{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.modal-header h2{letter-spacing:-.02em;font-size:20px;font-weight:700}.form-group{margin-bottom:14px}.form-group label{color:var(--text-secondary);margin-bottom:5px;font-size:13px;font-weight:500;display:block}.form-group input{border:1.5px solid var(--border);border-radius:var(--radius-sm);width:100%;font-family:var(--font);background:var(--surface);color:var(--text-primary);transition:all .25s var(--ease-out);box-sizing:border-box;padding:11px 14px;font-size:14px}.form-group input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);outline:none}.auth-error{color:#dc2626;border-radius:var(--radius-sm);background:#fef2f2;margin-bottom:12px;padding:10px 14px;font-size:13px;animation:.2s both slideUp}.auth-switch{text-align:center;color:var(--text-secondary);margin-top:16px;font-size:13px}.auth-switch a{color:var(--accent);font-weight:600;text-decoration:none;transition:color .2s}.auth-switch a:hover{color:var(--accent-hover)}.memory-desc{color:var(--text-secondary);margin-bottom:16px;font-size:13px}.memory-list{max-height:400px;overflow-y:auto}.memory-item{border-bottom:1px solid var(--border-light);justify-content:space-between;align-items:center;gap:10px;padding:10px 12px;transition:background .15s;display:flex}.memory-item:hover{background:var(--surface-alt)}.memory-item:last-child{border-bottom:none}.memory-fact{flex:1;align-items:flex-start;gap:8px;font-size:14px;display:flex}.memory-badge{flex-shrink:0;font-size:14px}.memory-actions{flex-shrink:0;gap:4px;display:flex}.memory-add{border-top:1px solid var(--border-light);gap:8px;margin-top:14px;padding-top:14px;display:flex}.memory-add input{border:1.5px solid var(--border);border-radius:var(--radius-sm);font-family:var(--font);background:var(--surface);color:var(--text-primary);flex:1;padding:8px 12px;font-size:13px;transition:border-color .2s}.memory-add input:focus{border-color:var(--accent);outline:none}.memory-add .btn-primary{white-space:nowrap;width:auto}.memory-empty{text-align:center;color:var(--text-muted);padding:30px;font-size:14px}.modal-pricing{max-width:720px}.pricing-grid{grid-template-columns:repeat(3,1fr);gap:14px;margin-top:16px;display:grid}.pricing-card{border:1.5px solid var(--border);border-radius:var(--radius);text-align:center;transition:all .3s var(--ease-spring);background:var(--surface);padding:22px;position:relative}.pricing-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}.pricing-card.featured{border-color:var(--accent);box-shadow:0 4px 24px var(--accent-glow)}.pricing-card.current{background:var(--accent-light)}.pricing-badge{color:#fff;white-space:nowrap;background:linear-gradient(135deg,#2d2d2f,#48484a);border-radius:10px;padding:3px 14px;font-size:11px;font-weight:600;position:absolute;top:-10px;left:50%;transform:translate(-50%)}.pricing-card h3{margin-bottom:8px;font-size:16px;font-weight:600}.price-amount{color:var(--accent);font-size:28px;font-weight:700}.price-period{color:var(--text-secondary);font-size:13px}.pricing-features{text-align:left;margin:14px 0;font-size:13px;list-style:none}.pricing-features li{color:var(--text-secondary);padding:4px 0}.btn-plan{border-radius:var(--radius-sm);width:100%;font-family:var(--font);cursor:pointer;transition:all .25s var(--ease-spring);color:#fff;background:linear-gradient(135deg,#2d2d2f,#48484a);border:none;padding:10px;font-size:14px;font-weight:600}.btn-plan:hover{transform:translateY(-1px);box-shadow:0 4px 12px #00000026}.btn-plan.current{background:var(--surface-alt);color:var(--text-muted);cursor:default;transform:none}.usage-bar{background:var(--surface-alt);border-radius:var(--radius-sm);margin-bottom:12px;padding:12px 16px}.usage-row{justify-content:space-between;align-items:center;margin-bottom:4px;font-size:13px;display:flex}.usage-count{color:var(--accent);font-weight:600}.usage-progress{background:var(--border);border-radius:2px;height:4px;margin-bottom:8px;overflow:hidden}.usage-fill{height:100%;transition:width .5s var(--ease-out);background:linear-gradient(90deg,#2d2d2f,#48484a);border-radius:2px}@media (width<=768px){html,body{overflow-x:hidden}.app{height:100svh;height:-webkit-fill-available}.sidebar{z-index:50;width:80vw;max-width:300px;position:fixed;top:0;bottom:0;left:0;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.sidebar-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:49;background:#0000004d;display:block;position:fixed;inset:0}.menu-btn{display:flex}.chat-main{flex-direction:column;width:100%;max-width:100vw;height:100%;display:flex;overflow:hidden}.chat-header{flex-shrink:0;min-height:48px;padding:10px 14px}.chat-header h1{font-size:16px}.header-subtitle{display:none}.chat-messages{-webkit-overflow-scrolling:touch;flex:1 1 0;min-height:0;padding:12px 10px;overflow:hidden auto}.welcome{padding:24px 12px 16px}.welcome-icon{margin-bottom:12px;font-size:44px}.welcome-icon img{width:56px;height:56px}.welcome h2{margin-bottom:6px;font-size:22px}.welcome p{margin-bottom:20px;font-size:13px}.capabilities{grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:16px}.cap-card{padding:14px 8px}.cap-icon-wrap{border-radius:10px;width:36px;height:36px}.cap-title{font-size:12px}.cap-desc{font-size:10px}.starters{grid-template-columns:repeat(2,1fr);gap:8px}.starter-card{padding:10px 12px;font-size:12px}.starter-icon{font-size:16px}.msg-content{max-width:88%}.msg-bubble{padding:10px 14px;font-size:14px}.chat-input-area{padding:6px 10px;padding-bottom:calc(8px + env(safe-area-inset-bottom,0px));background:var(--bg);z-index:5;flex-shrink:0;position:relative}.input-wrapper{border-radius:16px;padding:4px}.input-wrapper textarea{padding:8px 4px;font-size:16px}.attach-btn,.voice-btn{width:34px;height:34px}.send-btn{border-radius:10px;width:36px;height:36px}.input-hint{display:none}.pricing-grid{grid-template-columns:1fr}.modal{width:92%;padding:20px}.modal-pricing{max-width:100%}.image-preview{max-width:140px;margin:0 10px 6px}.doc-preview{margin:0 10px 6px}.emotion-badge{margin:0 10px 6px;font-size:12px}.msg-bubble table{display:block;overflow-x:auto}.code-block pre{padding:12px}.msg-bubble pre{max-width:calc(100vw - 80px)}}@media (width<=380px){.capabilities{grid-template-columns:repeat(2,1fr);gap:6px}.cap-card{padding:10px 6px}.starters{grid-template-columns:1fr}.welcome h2{font-size:20px}.welcome{padding:16px 8px 12px}.chat-messages{padding:8px 6px}}