@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,d09GMgABAAAAAA4oAA4AAAAAHbQAAA3TAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAABmAAgRQIDgmcDBEICo1oijYBNgIkA14LMgAEIAWJAAeBHAyBHBvbGiMRdnO0IkRRkiYDgr9KsJ1NUAf2kILNxgUmgqIgq1P89vcbIcmsQbRps3vCcXdYOKSWEPEKgZgQkprQQsxIXUgq0DqpGKmIvrgkeVGtEQD9DzAO29fM9jYhxZEsL2FeURH2JN4MIcTdO049NCVdxQ/w9NrSYFEBKTDKpLKfNkCGDc1RwjZLQcm3vqJ2UW9Xfa3tgAHz6ivp6vgC2yD4/6352ndnN0X0TL7seypkjZlMsjmZnf0Mm5Q+JykRWQBKCVCVPbARPXWyQtb5VgLB6Biq7/Uixcj2WGqdI8tGSgkuRG+t910GKP2D7AQH0DB9FMDW/obJZ8giFI3Wg8Cvevz0M+5m0rTh7XDBlvo9Y4vm13EXmfttwI4mBo1EG15fxJhUiCLbiiyCf/ZA6MFAhg3pGIZGdGIVjtPn6UcMk9A/UUr9PhoNsCENw1APAq0gpH73e+M+0ueyHbabc3vkbcdtzcf/fiy+NxQEjf9ud/ELBHAXJ0nk4z+MXH2Ev/kWyV4k7SkvpPc9Qr38F6RPWnM9cN6DJ0AdD1BhtgABtmoRoFCvPsBAumNm6soZG2Gk5GyVTo2sJncSyp0jQTYoR6WDvTwaaEcHsxHfvuWhHA3a6bN7twRKtcGok6NsCi7jYRrM2jExsUFMxMQYuJbMhuWNOumEJy9hi29Dmg5zMp/A5+hhPG19j1vBrq8JTLr8ki5VLPmG/PynJHVul440bxg5xuymHUFPBshC+nA9I1FmwbRBTNHAcik3Oae0cxKoI3MOriM42UrPe51nsaGxJ+WfXubAsP84aabUlQSJ1IiE0iPETLUU4CATgfXSCSpuRFRmCGbO+wSpAnzaeaCYW1VNEysRtuXCEL1kUFUbbtMv3Tilt/1c11jt3Q5bbMa84cpWipp8Elw3MZhOHsOlwwVUQM3lAR35JiFQbaYCRnMF2lxAWoOg2gyoIV4PouX8HytNIfLhqpJtXB4vjiViUI8IJ7bkC4ikkQvKksnOTKICwnqWSZ9YS5f0WCxmpgjbIq7EJcM4aI2nmhLNY2JIUgOjXZFWBHb+x5oh6cwb0Tv1ackHdKi0I9OO2wE9aogIOn540CCCziyhN+IaejtgAONKznHlHyutPrHGwCx9S6B8kfS4Mfi4Eyv7OU730bT1SCBjt834cXsf43zVjPUqqJjgrjeGnBxSG4aYAKFuVbeCfkDIjAqMb6yLNIbCuvXhMH2/+k2vkNpkORhR59N1CkzoOENvneIosjYmuTxlhUzaGEJQ/iWqx4dmwpmKjrwTiTGTCVozNAYqk/zXOndWxuWSmJkQpJw3pK5KX6QrLt5LATMqpmPAQhkhK6PUjzHUn7E0gHE0kPE0iKkolgkUx9SZmVAdDgpffdyJKg3k7VmzYGCwVXGz/tXmkOIp+vcWs+EMuhhvN0h9uhfzWJziBQmCREGSIFmQIkgVpAnSBRmC//6hkLZwaVhwxlrJSOdqlFtOYxlau9F2QN5Y98xmIAsiM1HVp2VFX+DHHGg6Ecjh3vmqtidX3qHI2qycTk/iwxSt5UzTmEP92ZBnEWTk4Mx8Mpl78ZDokxg/KWb+Q0QkvdKVmq3TMW+RXEgrsziSAfNXFMhDc60N5N9jQzjfO0kBKpUZl0ZmwJ41j/B9Hz6wmRaJB84niNmQrzp9eSlQCDDzazGDdVi3P36VZQ+Jy4f9UBNp+3zTjqI4abaFAm+GShVaXlsGdF3FYzZcDI6cori4kMxUECl9IjJZpzkvitAoxKue+90pDMvcKRxLl53TmOKCmV/xRolNKSqqUxc6LStOETmFOiLZZptlZepcKiAzteG8PEdpnQpbOMNcMsR4RR2Bs0cKFEvSmIjAFcnarqwUL4lDhHmnVkwu1IwshbiCcgvOheZuYyOteufZZwlcTlLgnZ3o/WcYdzZHW/WGaqaVfmTZ1aWCceJjkbZqsfbkOtcFlUZM/jy+hXHDbaUobWqqXaeWobbLO99yG5N3U4wxco0rQGGcOLASFMXeJoham8M+/x6O2WywK2l4HGbq1CoUyC/IZikQhdq3SiuNrvAEj0AVu9x2x3lp/xWzahaxidezFVtdcb5uEnzyl0ZmYiuKI0exvCd4Xc9CV1KB0db00z92wDPde0kukbvZIWN6jUWFTmPIC/Y4UPCm8UfDTFZpZNon1qLFTkBhxzB+FjQRA2Q/YRJT8pQigslMaUpFyAG8TMlXigiqmAZX4xgijKjRlGpLE0GdplRfCaJo0JQaSxNBk6ZmMzcya0FmrcisDdn0Q3HI2sWSppYigmlM1XT/kLQZSNpMJG0WkjYbSZuDpM1F0uYhFc1HxU4m1QJjDK6iL0S5uSj5rgXc3RejEigtcRBtqYPQsiTskmO5vosV+q4VGIKbOkDg0jtRrq+Em1YloaTFar3EGr1EUC8R0kus1Uus00usL97ABr2BjXoDm/QGNhuWtMVBKOwg/i78lT7hBsAvDmwHc/ao3vmUbBmhjeYySZNWvGkfZAgISDSaDo1SVpzGDsAEkF8B+gEapViUoZgUWXcRIGFZNm6gWbAKk0bp0k1MHG9fLYtV4iS2SmLEQFARzRcnf9PUS0LVn05/J9MiRRBU3v2IrvW974v4N00L7ZMk0wXP1409CHo/an8zTRHD3eSJ6m8D4YMkZNl3M79sqeuAsr/m3f+8/yl7A50aiAEJgeBeMWzu7ui9UfUBCe2TIqZIoOd/3/udRBOQidQZUERzb2/VwZN1H/Sju82ew2H2Wfr6qvfVf3hqwDvAIpkQVFy4B9Pe9e4/XvPeceu7h3dvO56iJPf0+A6cqA2ip18ER+iFgggiuOkvj24bby0N9j2UHIkgqIt+sVgfodC4YghLSMjSZbH0VR/6dMDrYJeKHilKTemt6v6kvzvn3/RrdWtr0GoN/xL+Sex/cPYLUpepx9cz/D46UPU5KXgAQa+NDps1v6J3xP1i2HtaDB0M9aX2deA7SYff//+gUCovMmIK/qfsFcOk+4Y5ZN97XlG6zebqtMbKgeRFi51vnxTQYBUik2rS/Cn6PC8ADR8FGxsRPB82dzfND90gIcshOcYUkfjherBz53odpm6TP8txlwOZ71xmfHHOvq053qFF/MRlS3jP0ELudrf2OeN8DHvp6ZceLe8qKYvWz/7yp0u4dKPfli3CYq0O13Ih71mylJ80tOi10On8wi+F4+LWgDPeJ30msSQt9/vkmHq9/Lvo2b461mP801v3W4xTcs6CbvF9UDdrSt+A8OUbpSh55qAUFXWznBBfdeJ8a4d7ugT5tvxUza3h9m4H7ptTqiG4z0g5dc0X29OcGlhpGFMpQo9ytTS+NViZpNdvU4kWx+LKxNY10kQ1yqGXrhe4/1nvP7E+nd5A92TtaRplbHSqoIdOqtRWti+fkB5/n1+/VvCmz12pG1kpQWsfi1ftlBobm0bpngs16CHkbIwdLnParxtTV3QYRlfJ0KFskH7pdN/YDn+yRuSd7sNH3aO0DYPggk6uWuXrfOc+fa3VTxFVvKaNxHsiHmsXyCLIE5yuOeN3/Jdf8HBL/5M6shjyhxHx9BjB1O0+4NLOnjLLSxwO7ukN4jMbOIcD879KLSi6Pk61Oqm2377n8079PXEEQ7cy7OKEC9nbpet118fxweTafpt69x/Bt8UqGzNQt7aelpc44dn5cqhwf71+qKp/Zf/+a0zcizOUWpl/iBcSXip0pplkatCchoH5c5aUM8I7/dWxAej8WicPL1URFZ9BDJelUwEwTkGqUhgSlydVes95YdXvhh9Gfz/aeFWvgVb4tuLbcv4+wLdutVZv/cUonwBD/6eDlE0aSiKK/uoH3+J1wDE/jMVqY2ysGufN84oIXB0sPzy8ollX/LegY74DgJXJR57sn+VGza0x3DnuIgABFM15LmajjjsNlYj+JEZGbuRYcAMOWxFkPN2w6Wd46xo4gVWQR/X4lyI/R6K/YK0110GzudPRW7Y+UOBGTfNNzHeYT0fiH0taunBpq9HEW8OKSaBGj21L0MqenEmNRWBAWDWAk4CpNoEZJ2tTaPFgbQYj8HxtFilErs3BTRwT8uO1NXQaWfIotchmPkAF5mMBAliEmZiOGVgCG9LgRzpscMAOOwowlT3JhusdazXGSC/hxR3UlmWVwWHpOIKheqONvjyhSiTHIkVUco5bnji8m//zL7PKaT1Vl5I6UE609f+gkr6MZKVyKc7zJRmCahLsdlyA5fdQkRSan9LgnnLEyGSkaKJCJog0wAgvepWBt80+1yKln1bMVtCljfNWDueKLsWwaEbBSfSPTEmVRsUcYYMnEjcjeyCZzBXK9E9BYBXLKjOSpUDR+nEV3TFSUdQaz+ot98QxgXwx0GQ+EEUAKB2qZPkQQ0GqFD8UPFMqyaCHM24BZmSGic9EYMagKizOw9Hz50DMrDLrqqLkTAhplMictiCAx5S3BIUQdeJeLnBy2CNtMfz6cV4u8XKoFZQesbf9YZiIERiHjaNodDW6LgcirX/mPnJIkBGDUpTBhSa0EIr38D5hCIszhCM8URGBqImoWjpvpt1ebu/v3Gl3qJfMnNM+9V+kiRFyROTPHQWOcs1dNW94/ukKMPZBvDi55i5CttdeJz84DLngLqjcdwEZ87bFFR8CIG35OAkDVN6VRDZ7aq67NteYqZ2lpT8oYB2CytoBd6VuAx4WgiAsnuj3WohG+LugzXiQRDeM3XYXlULv4dp5VFYC)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;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.18.7"}.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{color:#172033;font-synthesis:none;text-rendering:optimizelegibility;--ink:#172033;--muted:#667085;--line:#e2e7ef;--paper:#fff;--canvas:#f4f6f9;--blue:#2563eb;--blue-dark:#1749af;--blue-soft:#eaf1ff;--violet:#7451d8;--violet-soft:#f0ecff;--amber:#b66a06;--amber-soft:#fff2dc;--coral:#d14c3b;--coral-soft:#ffebe7;--green:#17845e;--green-soft:#e5f6ef;--shadow:0 12px 34px #17203317;background:#f4f6f9;font-family:Inter,PingFang SC,Microsoft YaHei,system-ui,-apple-system,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background-color:#cfe2ff;background-image:url(/math-dreamscape.png);background-position:50%;background-repeat:no-repeat;background-size:cover;background-attachment:fixed;min-width:320px;min-height:100vh;margin:0}button,input{font:inherit}button{color:inherit}button:focus-visible,input:focus-visible{outline-offset:2px;outline:3px solid #2563eb40}h1,h2,h3,p{margin:0}button{cursor:pointer}.site-shell{background:#f4f6f942;min-height:100vh;padding-bottom:0}.app-loading{min-height:100vh;color:var(--muted);justify-content:center;align-items:center;gap:13px;display:flex}.app-loading strong{font-size:13px}.login-page{background:#e4efff59;justify-content:center;align-items:center;min-height:100vh;padding:28px;display:flex}.login-panel{background:#fffffff5;border:1px solid #bdcde6e6;border-radius:8px;width:100%;min-width:0;max-width:430px;padding:34px;box-shadow:0 24px 60px #233e6826}.login-brand{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding-bottom:22px;display:flex}.login-brand>img{width:90px;height:auto;margin-right:8px}.login-brand>div{flex-direction:column;min-width:0;display:flex}.login-brand strong{font-size:15px}.login-brand small{color:var(--muted);margin-top:2px;font-size:9px}.login-copy{margin-top:27px}.login-copy h1{margin-top:6px;font-size:25px}.login-copy p{color:var(--muted);margin-top:8px;font-size:11px;line-height:1.7}.login-panel form,.account-create-panel{gap:13px;margin-top:24px;display:grid}.login-panel label,.account-create-panel label{gap:6px;display:grid}.login-panel label span,.account-create-panel label span{color:#4f5b6e;font-size:10px;font-weight:750}.login-panel input,.account-create-panel input{background:#fff;border:1px solid #d5dce7;border-radius:6px;width:100%;height:43px;padding:0 11px;font-size:12px}.login-panel form>button,.account-create-panel>button{border:1px solid var(--blue);background:var(--blue);color:#fff;border-radius:6px;min-height:44px;margin-top:5px;font-size:12px;font-weight:800}.login-panel form>button:disabled{cursor:wait;opacity:.65}.form-error,.form-success{border-radius:5px;padding:9px 10px;font-size:10px;line-height:1.5}.form-error{background:var(--coral-soft);color:var(--coral)}.form-success{background:var(--green-soft);color:var(--green)}.site-header{z-index:50;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:linear-gradient(105deg,#e8f2fff5 0%,#f2f8fff2 52%,#e8f2fff5 100%);border-bottom:1px solid #c4d3ead1;height:72px;position:sticky;top:0}.header-inner{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:28px;width:min(1180px,100% - 40px);height:100%;margin:0 auto;display:grid}.header-branding{align-items:center;gap:18px;min-width:0;display:flex}.corporate-logo{border-right:1px solid #849abc57;flex:0 0 113px;align-items:center;height:44px;padding-right:18px;display:flex}.corporate-logo img{width:95px;height:auto;display:block}.brand{text-align:left;background:0 0;border:0;flex:none;align-items:center;gap:10px;padding:0;display:flex}.brand-symbol{background:var(--blue);color:#fff;border-radius:8px;place-items:center;width:40px;height:40px;display:grid;box-shadow:0 8px 16px #2563eb38}.brand-symbol span{font-family:Georgia,serif;font-size:23px;font-weight:700;transform:translateY(-1px)}.brand>span:last-child{flex-direction:column;display:flex}.brand strong{letter-spacing:0;font-size:18px}.brand small{color:var(--muted);margin-top:1px;font-size:10px}.main-nav{justify-content:center;gap:6px;height:100%;display:flex}.main-nav button{color:#6b7383;background:0 0;border:0;justify-content:center;align-items:center;gap:7px;min-width:96px;padding:0 18px;font-size:14px;font-weight:700;display:flex;position:relative}.main-nav button:after{background:var(--blue);content:"";opacity:0;border-radius:2px 2px 0 0;height:3px;position:absolute;bottom:-1px;left:23px;right:23px}.main-nav button.active{color:var(--blue)}.main-nav button.active:after{opacity:1}.header-actions{justify-content:flex-end;align-items:center;gap:12px;display:flex}.stage-switch{border:1px solid var(--line);text-align:left;background:#fff;border-radius:7px;justify-content:space-between;align-items:center;gap:12px;min-width:124px;padding:7px 10px 7px 12px;display:flex}.stage-switch>span{flex-direction:column;display:flex}.stage-switch strong{font-size:13px}.stage-switch small{color:var(--muted);font-size:10px}.avatar-button{color:#fff;background:#172033;border:0;border-radius:50%;place-items:center;width:36px;height:36px;font-size:13px;font-weight:800;display:grid}.mobile-menu-button{display:none}.stage-popover{border:1px solid var(--line);width:250px;box-shadow:var(--shadow);background:#fff;border-radius:8px;padding:10px;position:absolute;top:62px;right:max(20px,50vw - 545px)}.stage-popover>p{color:var(--muted);padding:7px 9px 10px;font-size:11px;font-weight:700}.stage-popover button{text-align:left;background:0 0;border:0;border-radius:6px;justify-content:space-between;align-items:center;width:100%;min-height:54px;padding:8px 10px;display:flex}.stage-popover button:hover,.stage-popover button.active{background:var(--blue-soft);color:var(--blue)}.stage-popover button span{flex-direction:column;gap:2px;display:flex}.stage-popover button strong{font-size:14px}.stage-popover button small{color:var(--muted);font-size:11px}.mobile-tabs{display:none}.welcome-band{background:#eef3fa38;border-bottom:1px solid #cfdbebc7}.welcome-inner{justify-content:space-between;align-items:center;gap:50px;width:min(1180px,100% - 40px);min-height:300px;margin:0 auto;padding:38px 0;display:flex}.welcome-copy{min-width:0}.date-chip{color:#9a5a05;background:#fff7e9;border:1px solid #f0cf9e;border-radius:6px;align-items:center;gap:6px;padding:6px 9px;font-size:11px;font-weight:800;display:inline-flex}.welcome-copy h1{letter-spacing:0;margin-top:18px;font-size:clamp(30px,4vw,46px);line-height:1.18}.welcome-copy>p{color:var(--muted);margin-top:11px;font-size:15px}.quick-stats{flex-wrap:wrap;gap:28px;margin-top:29px;display:flex}.quick-stats span{color:var(--muted);font-size:12px}.quick-stats strong{color:var(--ink);margin-right:5px;font-size:19px}.math-visual{flex:0 0 365px;width:365px;height:220px;position:relative}.visual-paper{background:#fff;border:1px solid #d6deea;border-radius:8px;padding:25px 28px;position:absolute;inset:5px 18px 8px 20px;overflow:hidden;transform:rotate(1.5deg);box-shadow:0 18px 38px #27365424}.paper-label{color:var(--blue);letter-spacing:1.8px;font-size:9px;font-weight:900}.visual-paper>strong{margin-top:15px;font-family:Georgia,serif;font-size:20px;display:block}.function-graph{border-bottom:1px solid #dce2eb;border-left:1px solid #dce2eb;height:86px;margin-top:12px;position:relative}.function-graph:before{content:"";background:#e4e8ef;width:1px;height:100%;position:absolute;left:50%}.function-graph i{border:3px solid var(--blue);border-top:0;border-radius:0 0 50% 50%;width:50%;height:73px;position:absolute;bottom:-3px;left:24%;transform:rotate(180deg)}.function-graph b{background:var(--coral);width:7px;height:7px;box-shadow:0 0 0 4px var(--coral-soft);border-radius:50%;position:absolute;top:22px;left:49%}.formula-row{color:#596274;justify-content:space-between;align-items:center;margin-top:12px;font-family:Georgia,serif;font-size:13px;display:flex}.formula-row em{background:var(--green-soft);width:22px;height:22px;color:var(--green);border-radius:50%;place-items:center;font-family:inherit;font-style:normal;display:grid}.visual-badge{color:#a45f03;background:#fff8e9;border:1px solid #ecd8b6;border-radius:7px;align-items:center;gap:7px;padding:10px 12px;font-size:12px;font-weight:850;display:flex;position:absolute;bottom:4px;right:0;box-shadow:0 8px 18px #362c1d1a}.resume-strip{border:1px solid #ccd9ec;border-left:4px solid var(--blue);background:#fff;border-radius:7px;grid-template-columns:42px minmax(0,1fr) 230px auto;align-items:center;gap:15px;width:min(1180px,100% - 40px);min-height:82px;margin:22px auto 0;padding:13px 15px;display:grid;box-shadow:0 6px 16px #1a2b490d}.resume-icon{background:var(--blue-soft);width:40px;height:40px;color:var(--blue);border-radius:50%;place-items:center;display:grid}.resume-copy{flex-direction:column;gap:3px;min-width:0;display:flex}.resume-copy span{color:var(--muted);font-size:10px}.resume-copy strong{text-overflow:ellipsis;white-space:nowrap;font-size:14px;overflow:hidden}.resume-progress{align-items:center;gap:10px;display:flex}.resume-progress>i{background:#e8edf4;border-radius:3px;width:170px;height:6px;overflow:hidden}.resume-progress b{border-radius:inherit;background:var(--blue);height:100%;display:block}.resume-progress span{width:38px;color:var(--muted);font-size:11px}.resume-strip>button{border:1px solid var(--blue);background:var(--blue);color:#fff;border-radius:6px;align-items:center;gap:6px;min-height:38px;padding:0 14px;font-size:12px;font-weight:800;display:flex}.mode-section{width:min(1180px,100% - 40px);margin:0 auto;padding:46px 0}.section-intro{justify-content:space-between;align-items:flex-end;gap:20px;display:flex}.section-kicker{color:var(--blue);letter-spacing:1.8px;font-size:9px;font-weight:900}.section-intro h2,.tool-band h2{margin-top:6px;font-size:27px}.section-intro p{color:var(--muted);margin-top:7px;font-size:13px}.today-goal{flex-direction:column;align-items:flex-end;display:flex}.today-goal>span{color:var(--muted);font-size:10px}.today-goal strong{margin-top:2px;font-size:21px}.today-goal small{color:var(--muted);margin-left:3px;font-size:11px;font-weight:500}.mode-tabs{border-bottom:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:24px;padding-bottom:22px;display:grid}.mode-tabs>button{border:1px solid var(--line);text-align:left;background:#fff;border-radius:7px;grid-template-columns:44px minmax(0,1fr) 18px;align-items:center;gap:12px;min-height:84px;padding:13px 14px;transition:transform .15s,border-color .15s,box-shadow .15s;display:grid}.mode-tabs>button:hover{border-color:#bbc7db;transform:translateY(-2px);box-shadow:0 8px 18px #1e305212}.mode-tabs>button>span{color:#566074;background:#eef1f6;border-radius:7px;place-items:center;width:42px;height:42px;display:grid}.mode-tabs>button>div{flex-direction:column;gap:4px;min-width:0;display:flex}.mode-tabs strong{font-size:15px}.mode-tabs small{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:11px;overflow:hidden}.mode-tabs>button>svg{color:#a7afbd}.mode-tabs>button.active{border-color:var(--blue);box-shadow:inset 0 -3px 0 var(--blue);background:#f8faff}.mode-tabs>button.active>span{background:var(--blue);color:#fff}.mode-tabs>button.active>svg{color:var(--blue)}.mode-content{padding-top:24px;animation:.18s ease-out content-in}@keyframes content-in{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.question-bank-empty{text-align:center;background:#ffffffb8;border:1px dashed #bfcce0;border-radius:7px;flex-direction:column;justify-content:center;align-items:center;min-height:300px;padding:35px 20px;display:flex}.question-bank-empty>span{background:var(--blue-soft);width:58px;height:58px;color:var(--blue);border-radius:7px;place-items:center;display:grid}.question-bank-empty h3{margin-top:16px;font-size:18px}.question-bank-empty p{max-width:480px;color:var(--muted);margin-top:8px;font-size:12px;line-height:1.7}.content-heading{justify-content:space-between;align-items:center;gap:20px;display:flex}.content-heading h3{font-size:18px}.content-heading p{color:var(--muted);margin-top:5px;font-size:12px}.content-heading>button{border:1px solid var(--line);min-height:36px;color:var(--muted);background:#fff;border-radius:6px;align-items:center;gap:6px;padding:0 11px;font-size:11px;display:flex}.paper-cards{overscroll-behavior-y:contain;scrollbar-color:#aebbd0 transparent;scrollbar-gutter:stable;scrollbar-width:thin;gap:9px;max-height:651px;margin-top:17px;padding-right:7px;display:grid;overflow-y:auto}.paper-cards::-webkit-scrollbar{width:7px}.paper-cards::-webkit-scrollbar-track{background:0 0}.paper-cards::-webkit-scrollbar-thumb{background:#aebbd0;border-radius:4px}.paper-cards:focus-visible{outline-offset:4px;outline:3px solid #2563eb40}.paper-card{border:1px solid var(--line);background:#fff;border-radius:7px;grid-template-columns:72px minmax(0,1fr) auto;align-items:center;gap:17px;height:123px;min-height:123px;padding:15px;display:grid}.paper-card:hover{border-color:#c3cede;box-shadow:0 7px 20px #1e30520f}.paper-year{border-radius:6px;flex-direction:column;justify-content:center;align-items:center;width:66px;height:76px;display:flex}.paper-year.blue,.category-icon.blue{background:var(--blue-soft);color:var(--blue)}.paper-year.violet,.category-icon.violet{background:var(--violet-soft);color:var(--violet)}.paper-year.amber,.category-icon.amber{background:var(--amber-soft);color:var(--amber)}.category-icon.coral{background:var(--coral-soft);color:var(--coral)}.paper-year strong{font-size:17px}.paper-year span{letter-spacing:1.4px;margin-top:4px;font-size:8px;font-weight:850}.paper-info{min-width:0}.paper-info>div:first-child{color:var(--muted);align-items:center;gap:9px;font-size:10px;display:flex}.status-tag{color:#506076;background:#edf2f8;border-radius:4px;padding:3px 6px;font-weight:800}.paper-info h3{margin-top:7px;font-size:15px}.paper-info>p{color:var(--muted);flex-wrap:wrap;align-items:center;gap:6px;margin-top:7px;font-size:11px;display:flex}.paper-info>p i{background:#aab2bf;border-radius:50%;width:3px;height:3px;margin:0 3px}.outline-action{background:#fff;border:1px solid #cfd7e3;border-radius:6px;align-items:center;gap:6px;min-height:40px;padding:0 13px;font-size:11px;font-weight:800;display:flex}.outline-action:hover{border-color:var(--blue);color:var(--blue)}.mini-progress{margin-top:8px;align-items:center!important;gap:8px!important;display:flex!important}.mini-progress>span{background:#e8edf4;border-radius:2px;width:100px;height:4px;overflow:hidden}.mini-progress i{border-radius:inherit;background:var(--blue);height:100%;display:block}.mini-progress em{color:var(--blue);font-size:9px;font-style:normal}.category-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:17px;display:grid}.category-card{border:1px solid var(--line);text-align:left;background:#fff;border-radius:7px;grid-template-columns:48px minmax(0,1fr) 55px;align-items:center;gap:13px;min-height:112px;padding:16px;display:grid}.category-card:hover{border-color:#bbc7da;transform:translateY(-1px);box-shadow:0 8px 20px #1e30520f}.category-card:disabled{cursor:not-allowed;filter:grayscale(.35);opacity:.58}.category-card:disabled:hover{border-color:var(--line);box-shadow:none;transform:none}.category-icon{border-radius:7px;place-items:center;width:46px;height:46px;display:grid}.category-copy{flex-direction:column;gap:3px;min-width:0;display:flex}.category-copy strong{font-size:15px}.category-copy small{color:var(--muted);font-size:11px}.category-copy em{color:var(--blue);margin-top:5px;font-size:10px;font-style:normal;font-weight:800}.category-side{color:#9ca6b6;flex-direction:column;align-items:flex-end;gap:7px;display:flex}.category-side b{color:var(--ink);font-size:11px}.category-side>i{background:#e8edf4;border-radius:2px;width:48px;height:4px;overflow:hidden}.category-side em{background:var(--blue);height:100%;display:block}.topic-heading label{border:1px solid var(--line);width:200px;height:38px;color:var(--muted);background:#fff;border-radius:6px;align-items:center;gap:7px;padding:0 10px;display:flex}.topic-heading input{background:0 0;border:0;outline:0;flex:1;min-width:0;font-size:11px}.topic-list{border-top:1px solid var(--line);margin-top:17px}.topic-list>button{border:0;border-bottom:1px solid var(--line);text-align:left;background:0 0;grid-template-columns:46px minmax(0,1fr) 145px 20px;align-items:center;gap:14px;width:100%;min-height:92px;padding:13px 7px;display:grid}.topic-list>button:hover{background:#f8fafd}.topic-number{width:42px;height:42px;color:var(--blue);background:#fff;border:1px solid #dce3ed;border-radius:7px;place-items:center;font-size:12px;font-weight:900;display:grid}.topic-copy{flex-direction:column;gap:3px;min-width:0;display:flex}.topic-copy small{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:9px;overflow:hidden}.topic-copy strong{font-size:14px}.topic-copy em{color:var(--muted);font-size:10px;font-style:normal}.topic-mastery{flex-direction:column;align-items:flex-end;gap:7px;display:flex}.topic-mastery>i{background:#e8edf3;border-radius:3px;width:120px;height:5px;overflow:hidden}.topic-mastery b{border-radius:inherit;background:var(--green);height:100%;display:block}.topic-mastery small{color:var(--muted);font-size:9px}.topic-list>button>svg{color:#9ba5b5}.tool-band{border-top:1px solid #e2e7efe0;width:min(1180px,100% - 40px);margin:4px auto 0;padding:34px 0 58px}.tool-band>div:first-child{display:block}.tool-band h2{margin-top:7px;font-size:23px}.tool-links,.asset-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;display:grid}.tool-links{margin-top:19px}.tool-links>button,.asset-grid>button{border:1px solid var(--line);text-align:left;background:#fffffff0;border-radius:7px;grid-template-columns:40px minmax(0,1fr) 18px;align-items:center;gap:11px;min-height:82px;padding:12px 14px;display:grid}.tool-links>button:hover,.asset-grid>button:hover{border-color:#bdc9dc;transform:translateY(-1px);box-shadow:0 8px 20px #1e30520f}.tool-links>button:disabled,.asset-grid>button:disabled{cursor:not-allowed;filter:grayscale(.25);opacity:.62;box-shadow:none;transform:none}.tool-links>button>span,.asset-grid>button>span{border-radius:6px;place-items:center;width:38px;height:38px;display:grid}.tool-links .coral,.asset-grid .coral{background:var(--coral-soft);color:var(--coral)}.tool-links .amber,.asset-grid .amber{background:var(--amber-soft);color:var(--amber)}.tool-links .violet,.asset-grid .violet{background:var(--violet-soft);color:var(--violet)}.asset-grid .blue{background:var(--blue-soft);color:var(--blue)}.tool-links div,.asset-grid div{flex-direction:column;gap:3px;min-width:0;display:flex}.tool-links strong,.asset-grid strong{font-size:13px}.tool-links small,.asset-grid small{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:10px;overflow:hidden}.tool-links>button>svg,.asset-grid>button>svg{color:#a1a9b6}.subpage{width:min(1180px,100% - 40px);margin:0 auto;padding:48px 0 80px}.subpage-title h1{margin-top:6px;font-size:34px}.subpage-title p{color:var(--muted);margin-top:8px;font-size:13px}.metrics-row{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:28px;display:grid}.metrics-row article,.report-metrics article{border:1px solid var(--line);background:#fff;border-radius:7px;padding:18px}.metrics-row article>span,.report-metrics article>span{color:var(--muted);font-size:11px}.metrics-row article>div,.report-metrics article>div{align-items:baseline;gap:4px;margin-top:8px;display:flex}.metrics-row article strong,.report-metrics article strong{font-size:27px}.metrics-row article small,.report-metrics article small{color:var(--muted);font-size:11px}.metrics-row article em,.report-metrics article em{color:var(--green);margin-top:8px;font-size:9px;font-style:normal;display:block}.record-panel{border:1px solid var(--line);background:#fff;border-radius:7px;margin-top:28px;padding:22px}.record-panel>button{border:0;border-bottom:1px solid var(--line);text-align:left;background:0 0;grid-template-columns:40px minmax(0,1fr) 50px 18px;align-items:center;gap:11px;width:100%;min-height:70px;padding:10px 0;display:grid}.record-icon{background:var(--blue-soft);width:38px;height:38px;color:var(--blue);border-radius:6px;place-items:center;display:grid}.record-panel>button>span:nth-child(2){flex-direction:column;gap:4px;min-width:0;display:flex}.record-panel>button strong{font-size:13px}.record-panel>button small{color:var(--muted);font-size:10px}.record-panel>button>b{color:var(--blue);text-align:right;font-size:11px}.record-panel>button>svg{color:#9aa5b5}.empty-record{min-height:220px;color:var(--muted);flex-direction:column;justify-content:center;align-items:center;gap:8px;display:flex}.empty-record strong{color:var(--ink);font-size:15px}.empty-record span{font-size:11px}.profile-hero{border-bottom:1px solid var(--line);grid-template-columns:72px minmax(0,1fr) auto;align-items:center;gap:18px;padding:25px 0;display:grid}.large-avatar{color:#fff;background:#172033;border-radius:50%;place-items:center;width:68px;height:68px;font-size:22px;font-weight:900;display:grid}.profile-hero>div:nth-child(2)>span{color:var(--muted);font-size:10px}.profile-hero h1{margin-top:2px;font-size:24px}.profile-hero p{color:var(--coral);align-items:center;gap:5px;margin-top:6px;font-size:11px;font-weight:700;display:flex}.profile-actions{align-items:center;gap:9px;display:flex}.level-badge{color:var(--amber);background:#fff8e9;border:1px solid #efd8b0;border-radius:7px;grid-template-columns:34px auto;align-items:center;column-gap:8px;padding:10px 14px;display:grid}.level-badge svg{grid-row:1/3}.level-badge span{font-size:9px}.level-badge strong{font-size:13px}.logout-button{border:1px solid var(--line);min-height:43px;color:var(--muted);background:#fff;border-radius:6px;align-items:center;gap:6px;padding:0 12px;font-size:10px;font-weight:750;display:flex}.profile-layout{grid-template-columns:minmax(0,1fr) 280px;gap:18px;margin-top:25px;display:grid}.profile-main{border:1px solid var(--line);background:#fff;border-radius:7px;padding:22px}.asset-grid{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:18px}.weekly-card{color:#fff;background:#172033;border-radius:7px;min-height:240px;padding:23px}.weekly-card>span{color:#aeb8cb;font-size:10px}.weekly-card>strong{margin-top:9px;font-size:19px;display:block}.weekly-card>div{background:#3a4458;border-radius:3px;height:6px;margin-top:50px;overflow:hidden}.weekly-card>div i{border-radius:inherit;background:#f3b23e;height:100%;display:block}.weekly-card p{color:#b9c1d0;margin-top:11px;font-size:11px}.weekly-card p b{color:#fff;margin-right:3px;font-size:20px}.weekly-card small{color:#8f9aaf;margin-top:5px;font-size:9px;display:block}.student-dashboard{border-top:1px solid #e2e7eff2;margin-top:28px;padding-top:30px}.dashboard-heading h3{margin-top:6px}.dashboard-heading>button{border-color:var(--blue);background:var(--blue);color:#fff;font-weight:800}.dashboard-metrics{margin-top:18px}.account-create-panel{background:#fffffff0;border:1px solid #cbd8eb;border-radius:7px;grid-template-columns:repeat(4,minmax(0,1fr)) auto;align-items:end;padding:18px}.account-create-panel h4{grid-column:1/-1;align-items:center;gap:7px;margin:0;font-size:14px;display:flex}.account-create-panel .form-error,.account-create-panel .form-success{grid-column:1/-1}.account-create-panel>button{min-width:120px;margin:0;padding:0 14px}.dashboard-layout{grid-template-columns:310px minmax(0,1fr);align-items:start;gap:14px;margin-top:16px;display:grid}.student-directory,.student-detail{border:1px solid var(--line);background:#fff;border-radius:7px}.student-directory{overflow:hidden}.directory-head{border-bottom:1px solid var(--line);padding:16px}.directory-head>div{justify-content:space-between;align-items:center;display:flex}.directory-head strong{font-size:13px}.directory-head span{color:var(--muted);font-size:10px}.directory-head label{color:#8b95a5;border:1px solid #d9e0ea;border-radius:6px;align-items:center;gap:7px;height:38px;margin-top:12px;padding:0 10px;display:flex}.directory-head input{background:0 0;border:0;outline:0;width:100%;min-width:0;font-size:10px}.student-directory-list{scrollbar-width:thin;max-height:672px;overflow-y:auto}.student-directory-list>button{border:0;border-bottom:1px solid var(--line);text-align:left;background:0 0;grid-template-columns:38px minmax(0,1fr) 48px 16px;align-items:center;gap:9px;width:100%;min-height:88px;padding:12px 14px;display:grid}.student-directory-list>button:hover{background:#f8fafd}.student-directory-list>button.active{background:var(--blue-soft);box-shadow:inset 3px 0 0 var(--blue)}.small-avatar{background:var(--blue-soft);width:34px;height:34px;color:var(--blue);border-radius:50%;place-items:center;font-size:11px;font-weight:850;display:grid}.student-directory-list>button.active .small-avatar{background:var(--blue);color:#fff}.student-list-copy{flex-direction:column;gap:3px;min-width:0;display:flex}.student-list-copy strong{text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.student-list-copy small{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:9px;overflow:hidden}.student-list-copy>i{background:#e6ebf2;border-radius:2px;width:100%;height:4px;margin-top:5px;overflow:hidden}.student-list-copy>i b{border-radius:inherit;background:var(--blue);height:100%;display:block}.student-list-score{flex-direction:column;align-items:flex-end;gap:2px;display:flex}.student-list-score strong{color:var(--blue);font-size:11px}.student-list-score small{color:var(--muted);font-size:8px}.student-directory-list>button>svg{color:#a1aaba}.directory-empty,.student-detail-empty{color:#8d98a9;text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:8px;min-height:220px;display:flex}.directory-empty span,.student-detail-empty span{font-size:10px}.student-detail{min-width:0;padding:20px}.student-detail-empty{min-height:500px}.student-detail-empty strong{color:var(--ink);font-size:14px}.student-detail-head{border-bottom:1px solid var(--line);grid-template-columns:52px minmax(0,1fr) auto;align-items:center;gap:12px;padding-bottom:17px;display:grid}.student-detail-head .large-avatar{width:50px;height:50px;font-size:17px}.student-detail-head>div{flex-direction:column;gap:2px;min-width:0;display:flex}.student-detail-head>div>span,.student-detail-head small{color:var(--muted);font-size:9px}.student-detail-head h4{margin:0;font-size:17px}.student-detail-actions{align-items:center;flex-direction:row!important;gap:6px!important}.student-detail-actions>b{background:var(--blue-soft);color:var(--blue);white-space:nowrap;border-radius:5px;padding:6px 8px;font-size:10px}.student-detail-actions>button{width:32px;height:32px;color:var(--coral);background:#fff7f5;border:1px solid #f0cbc5;border-radius:5px;place-items:center;padding:0;display:grid}.student-detail-actions>button:hover{border-color:var(--coral);background:var(--coral-soft)}.student-detail-metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:15px;display:grid}.student-detail-metrics article{border:1px solid var(--line);background:#fafbfd;border-radius:6px;min-width:0;padding:13px}.student-detail-metrics article>span{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:9px;display:block;overflow:hidden}.student-detail-metrics article>strong{margin-top:6px;font-size:20px;display:block}.student-detail-metrics article small{color:var(--muted);margin-left:3px;font-size:9px}.student-weekly-progress{background:#f6f8fb;border-radius:6px;grid-template-columns:minmax(120px,auto) minmax(120px,1fr) 70px;align-items:center;gap:13px;margin-top:12px;padding:13px;display:grid}.student-weekly-progress>div{flex-direction:column;gap:3px;display:flex}.student-weekly-progress span,.student-weekly-progress small{color:var(--muted);font-size:9px}.student-weekly-progress strong{font-size:11px}.student-weekly-progress>i,.learning-progress-list article>span>i{background:#dfe6f0;border-radius:3px;height:6px;overflow:hidden}.student-weekly-progress>i b,.learning-progress-list article>span>i b{border-radius:inherit;background:var(--blue);height:100%;display:block}.diagnostic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:12px;display:grid}.diagnostic-grid>section,.learning-progress-list{border:1px solid var(--line);border-radius:6px;padding:15px}.diagnostic-title{align-items:center;gap:8px;display:flex}.diagnostic-title>svg{color:var(--blue)}.diagnostic-title>div{flex-direction:column;gap:2px;display:flex}.diagnostic-title strong{font-size:11px}.diagnostic-title span{color:var(--muted);font-size:8px}.diagnostic-bars{gap:10px;margin-top:14px;display:grid}.diagnostic-bars>div{grid-template-columns:minmax(58px,100px) minmax(50px,1fr) 32px;align-items:center;gap:8px;display:grid}.diagnostic-bars span{text-overflow:ellipsis;white-space:nowrap;font-size:9px;overflow:hidden}.diagnostic-bars i{background:#edf0f5;border-radius:3px;height:5px;overflow:hidden}.diagnostic-bars i b{border-radius:inherit;background:var(--coral);height:100%;display:block}.topic-bars i b{background:var(--violet)}.diagnostic-bars>div>strong{color:var(--muted);text-align:right;font-size:8px}.diagnostic-empty{min-height:112px;color:var(--green);flex-direction:column;justify-content:center;align-items:center;gap:6px;display:flex}.diagnostic-empty span{color:var(--muted);font-size:9px}.learning-progress-list{margin-top:12px}.learning-progress-list article{border-bottom:1px solid var(--line);grid-template-columns:minmax(0,1fr) 150px;align-items:center;gap:12px;min-height:58px;display:grid}.learning-progress-list article:last-child{border-bottom:0}.learning-progress-list article>div{flex-direction:column;gap:3px;min-width:0;display:flex}.learning-progress-list article>div strong{text-overflow:ellipsis;white-space:nowrap;font-size:10px;overflow:hidden}.learning-progress-list article>div small{color:var(--muted);font-size:8px}.learning-progress-list article>span{grid-template-columns:minmax(0,1fr) 34px;align-items:center;gap:8px;display:grid}.learning-progress-list article>span strong{color:var(--blue);text-align:right;font-size:9px}.confirm-backdrop{z-index:100;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#111b2f75;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.confirm-dialog{text-align:center;background:#fff;border:1px solid #edc4be;border-radius:8px;width:min(390px,100%);padding:25px;box-shadow:0 24px 60px #141f3338}.confirm-icon{background:var(--coral-soft);width:46px;height:46px;color:var(--coral);border-radius:50%;place-items:center;margin:0 auto;display:grid}.confirm-dialog h3{margin-top:14px;font-size:18px}.confirm-dialog>p:not(.form-error){color:var(--muted);margin-top:9px;font-size:11px;line-height:1.75}.confirm-dialog .form-error{text-align:left;margin-top:12px}.confirm-dialog>div{grid-template-columns:1fr 1fr;gap:8px;margin-top:20px;display:grid}.confirm-dialog button{border:1px solid var(--line);background:#fff;border-radius:6px;justify-content:center;align-items:center;gap:6px;min-height:42px;font-size:11px;font-weight:800;display:flex}.confirm-dialog button:last-child{border-color:var(--coral);background:var(--coral);color:#fff}.confirm-dialog button:disabled{cursor:wait;opacity:.58}.session-page{background:#f4f6f957;min-height:100vh}.session-topbar{z-index:30;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:linear-gradient(105deg,#e8f2fff5 0%,#f2f8fff2 52%,#e8f2fff5 100%);grid-template-columns:44px minmax(0,1fr) 70px;align-items:center;height:68px;padding:0 max(16px,50vw - 560px);display:grid;position:sticky;top:0}.session-topbar>button:first-child{background:0 0;border:0;border-radius:6px;place-items:center;width:38px;height:38px;padding:0;display:grid}.session-topbar>button:first-child:hover{background:#eef1f5}.session-topbar>div{flex-direction:column;align-items:center;gap:2px;min-width:0;display:flex}.session-topbar>div strong{text-overflow:ellipsis;white-space:nowrap;max-width:100%;font-size:14px;overflow:hidden}.session-topbar>div span{color:var(--muted);font-size:9px}.session-count{color:var(--blue);justify-self:end;font-size:12px;font-weight:800}.submit-exam{border:1px solid var(--blue);background:var(--blue);color:#fff;border-radius:6px;justify-self:end;min-height:36px;padding:0 12px;font-size:11px;font-weight:800}.session-progress{z-index:31;background:#e0e5ed;height:3px;position:sticky;top:68px}.session-progress i{background:var(--blue);height:100%;transition:width .2s;display:block}.session-layout{grid-template-columns:minmax(0,1fr) 270px;gap:18px;width:min(1120px,100% - 32px);margin:0 auto;padding:28px 0 70px;display:grid}.question-panel{border:1px solid var(--line);background:#fff;border-radius:7px;min-width:0;padding:26px 30px 28px}.question-toolbar{justify-content:space-between;align-items:center;gap:14px;display:flex}.question-toolbar>div{color:var(--muted);flex-wrap:wrap;align-items:center;gap:16px;font-size:14px;line-height:1.4;display:flex}.type-pill{background:var(--blue-soft);color:var(--blue);border-radius:5px;padding:6px 10px;font-weight:850}.difficulty-rating{align-items:center;gap:7px;display:inline-flex}.difficulty-stars{color:#cbd3df;align-items:center;gap:1px;display:inline-flex}.difficulty-stars svg.active{color:#d99116}.difficulty-rating em{color:#596579;border-left:1px solid #d7dde7;padding-left:8px;font-size:12px;font-style:normal;font-weight:700}.question-toolbar>button{color:#8c96a7;background:0 0;border:0;border-radius:6px;place-items:center;width:38px;height:38px;padding:0;display:grid}.question-toolbar>button.favorite{color:var(--amber)}.question-number{align-items:baseline;gap:9px;width:fit-content;min-height:32px;margin-top:8px;display:flex}.question-number strong{color:var(--blue);font-variant-numeric:tabular-nums;letter-spacing:0;font-family:Inter,system-ui,sans-serif;font-size:27px;font-weight:850;line-height:1;display:block}.question-number span{color:#a2aab7;letter-spacing:1.5px;font-size:8px;font-weight:900;line-height:1;display:block}.question-source{color:#7b8799;margin-top:14px;font-size:11px;line-height:1.5}.question-stem{letter-spacing:0;margin-top:12px;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,sans-serif;font-size:clamp(18px,1.45vw,21px);font-weight:400;line-height:1.8}.question-stem p,.explanation-copy p{margin:0}.question-stem p+p,.explanation-copy p+p{margin-top:10px}.question-stem .katex{font-size:1.08em;line-height:1.25}.question-stem img,.explanation-copy img{object-fit:contain;border-radius:6px;width:auto;max-width:min(100%,620px);max-height:390px;margin:18px auto;display:block}.image-content img{border-radius:4px;width:100%;max-width:100%;max-height:none;margin:10px 0}.question-stem.image-content p,.question-stem.image-content p+p{margin:0}.question-image-crop{background:#fff;border-radius:4px;width:100%;margin:0 0 3px;display:block;position:relative;overflow:hidden}.image-content .question-image-crop img{border-radius:0;width:100%;max-width:100%;margin:0;position:absolute;top:0;left:0}.question-stem table,.explanation-copy table{border-collapse:collapse;width:100%;margin:18px 0;font-family:Inter,PingFang SC,sans-serif;font-size:13px;font-weight:400}.question-stem th,.question-stem td,.explanation-copy th,.explanation-copy td{text-align:center;border:1px solid #d9e0e9;padding:9px 11px}.question-stem th,.explanation-copy th{background:#f2f5f9;font-weight:750}.session-options{gap:4px;margin-top:20px;display:grid}.session-options button{text-align:left;background:0 0;border:1px solid #0000;border-radius:6px;grid-template-columns:36px minmax(0,1fr);align-items:center;gap:9px;min-height:48px;padding:5px 7px;display:grid}.session-options button>span{color:#606a7b;background:#f2f4f7;border:0;border-radius:8px;place-items:center;width:34px;height:34px;font-size:14px;font-weight:700;display:grid}.session-options button strong{font-size:16px;font-weight:400;line-height:1.55}.session-options .katex{font-size:1.12em;line-height:1.25}.session-options button:hover{background:#f7f8fa}.session-options button.selected{background:#f5f8ff;border-color:#c9d8f5}.session-options button.selected>span{border-color:var(--blue);background:var(--blue);color:#fff}.session-options button.correct{background:#f0faf6;border-color:#58a98b}.session-options button.correct>span{border-color:var(--green);background:var(--green);color:#fff}.session-options button.wrong{background:#fff5f3;border-color:#df8275}.session-options button.wrong>span{border-color:var(--coral);background:var(--coral);color:#fff}.session-options.image-options{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;width:min(100%,420px)}.session-options.image-options button{background:#fff;border-color:#dfe4ec;grid-template-columns:1fr;justify-items:center;min-height:46px;padding:5px}.session-options.image-options button>span{background:0 0;border-radius:0;width:auto;height:auto}.session-options.image-options button:hover{background:#f7f9fd;border-color:#b8c9e8}.session-options.image-options button.selected{background:#f5f8ff;border-color:#c9d8f5}.session-options.image-options button.selected>span{color:var(--blue);background:0 0}.session-options.image-options button.correct{background:#f0faf6;border-color:#58a98b}.session-options.image-options button.correct>span{color:var(--green);background:0 0}.session-options.image-options button.wrong{background:#fff5f3;border-color:#df8275}.session-options.image-options button.wrong>span{color:var(--coral);background:0 0}.fill-answer{flex-direction:column;gap:8px;margin-top:28px;display:flex}.fill-answer span{color:var(--muted);font-size:11px;font-weight:700}.fill-answer input{background:#fff;border:1px solid #dbe1ea;border-radius:7px;width:100%;height:52px;padding:0 14px;font-size:15px}.fill-answer input:disabled{color:var(--ink);opacity:1;background:#f5f7fa}.essay-workspace{color:#8b95a5;text-align:center;background:#f9fafc;border:1px dashed #c9d2df;border-radius:7px;flex-direction:column;justify-content:center;align-items:center;gap:7px;min-height:150px;margin-top:28px;display:flex}.essay-workspace strong{color:var(--ink);font-size:14px}.essay-workspace span{font-size:11px}.explanation{border:1px solid #cde7dc;border-left:4px solid var(--green);background:#f3fbf8;border-radius:6px;margin-top:24px;padding:18px}.explanation.wrong{border-color:#f0cbc5;border-left-color:var(--coral);background:#fff7f5}.explanation.neutral{border-color:#d7def2;border-left-color:var(--violet);background:#f8f7ff}.explanation-title{color:var(--green);flex-wrap:wrap;align-items:center;gap:8px;display:flex}.explanation.wrong .explanation-title{color:var(--coral)}.explanation.neutral .explanation-title{color:var(--violet)}.explanation-title strong{font-size:13px}.explanation-title>span{color:#4e5869;align-items:center;gap:3px;font-size:12px;display:inline-flex}.explanation-copy{color:#4e5869;margin-top:11px;font-size:13px;line-height:1.85}.explanation-copy.image-content{margin-left:-10px;margin-right:-10px}.explanation-copy .katex-display,.question-stem .katex-display{margin:12px 0;padding:7px 0;overflow:auto hidden}.self-score{border-top:1px solid #e0dff1;flex-wrap:wrap;align-items:center;gap:7px;margin-top:15px;padding-top:13px;display:flex}.self-score>span{color:var(--muted);margin-right:5px;font-size:10px}.self-score button{background:#fff;border:1px solid #d4d5e6;border-radius:5px;min-height:32px;padding:0 10px;font-size:10px}.self-score button.active{border-color:var(--violet);background:var(--violet);color:#fff}.question-actions{border-top:1px solid var(--line);grid-template-columns:auto auto minmax(150px,1fr);gap:9px;margin-top:30px;padding-top:20px;display:grid}.question-actions button{border-radius:6px;justify-content:center;align-items:center;gap:6px;min-height:44px;padding:0 14px;font-size:11px;font-weight:800;display:flex}.question-actions .previous,.question-actions .sheet-toggle{background:#fff;border:1px solid #d9e0e9}.question-actions .next{border:1px solid var(--blue);background:var(--blue);color:#fff;justify-self:stretch}.question-actions button:disabled{cursor:not-allowed;opacity:.4}.answer-sheet{border:1px solid var(--line);background:#fff;border-radius:7px;align-self:start;padding:19px;position:sticky;top:98px}.answer-sheet-head{justify-content:space-between;align-items:center;display:flex}.answer-sheet-head>div{align-items:baseline;gap:7px;display:flex}.answer-sheet-head span{font-size:13px;font-weight:800}.answer-sheet-head strong{color:var(--blue);font-size:10px}.answer-sheet-head button{background:0 0;border:0;place-items:center;width:34px;height:34px;padding:0;display:none}.timer{color:var(--amber);background:#fff5e5;border-radius:6px;grid-template-columns:20px minmax(0,1fr);align-items:center;column-gap:7px;margin-top:16px;padding:11px;display:grid}.timer svg{grid-row:1/3}.timer span{font-size:9px}.timer strong{font-family:ui-monospace,monospace;font-size:16px}.answer-grid{overscroll-behavior:contain;scrollbar-color:#9db7df #edf3fb;scrollbar-width:thin;grid-template-columns:repeat(5,1fr);grid-auto-rows:40px;gap:7px;max-height:467px;margin-top:18px;padding:2px 6px 2px 2px;display:grid;overflow-y:auto}.answer-grid::-webkit-scrollbar{width:7px}.answer-grid::-webkit-scrollbar-track{background:#edf3fb;border-radius:4px}.answer-grid::-webkit-scrollbar-thumb{background:#9db7df;border-radius:4px}.answer-grid button{color:#687386;background:#fff;border:1px solid #dbe1e9;border-radius:5px;min-height:40px;padding:0;font-size:10px}.answer-grid button.answered{border-color:var(--blue);background:var(--blue-soft);color:var(--blue);font-weight:800}.answer-grid button.current{box-shadow:0 0 0 2px var(--blue)}.sheet-legend{color:var(--muted);gap:15px;margin-top:16px;font-size:9px;display:flex}.sheet-legend span{align-items:center;gap:5px;display:flex}.sheet-legend i{background:#fff;border:1px solid #d8dfe8;border-radius:2px;width:9px;height:9px}.sheet-legend i.answered{border-color:var(--blue);background:var(--blue-soft)}.sheet-submit{border:1px solid var(--blue);width:100%;min-height:40px;color:var(--blue);background:#fff;border-radius:6px;margin-top:18px;font-size:11px;font-weight:800}.empty-session{min-height:100vh;color:var(--muted);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:10px;display:flex}.empty-session h1{color:var(--ink);font-size:21px}.empty-session p{font-size:12px}.empty-session button{background:var(--blue);color:#fff;border:0;border-radius:6px;min-height:42px;margin-top:8px;padding:0 15px;font-size:12px;font-weight:800}.report-page{background:#f4f6f957;min-height:100vh}.report-page>header{border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);text-align:center;background:linear-gradient(105deg,#e8f2fff5 0%,#f2f8fff2 52%,#e8f2fff5 100%);grid-template-columns:40px minmax(0,1fr) 40px;align-items:center;height:64px;padding:0 max(16px,50vw - 450px);display:grid}.report-page>header button{background:0 0;border:0;border-radius:6px;place-items:center;width:38px;height:38px;padding:0;display:grid}.report-page>main{width:min(900px,100% - 32px);margin:0 auto;padding:35px 0 70px}.report-hero{text-align:center}.report-score{width:132px;height:132px;color:var(--blue);border:9px solid #dce7ff;border-radius:50%;justify-content:center;align-items:baseline;margin:18px auto 0;padding-top:35px;display:flex;box-shadow:inset 0 0 0 2px #aec4fa}.report-score strong{font-size:43px}.report-score span{font-size:12px}.report-hero h1{margin-top:19px;font-size:23px}.report-hero p{color:var(--muted);margin-top:6px;font-size:11px}.report-metrics{grid-template-columns:repeat(4,minmax(0,1fr));gap:9px;margin-top:29px;display:grid}.report-review{border:1px solid var(--line);background:#fff;border-radius:7px;margin-top:20px;padding:20px}.report-review>div:last-child{grid-template-columns:repeat(10,1fr);gap:8px;margin-top:17px;display:grid}.report-review>div:last-child span{aspect-ratio:1;border-radius:5px;place-items:center;font-size:11px;font-weight:800;display:grid}.report-review span.correct{background:var(--green-soft);color:var(--green)}.report-review span.wrong{background:var(--coral-soft);color:var(--coral)}.report-buttons{justify-content:center;gap:10px;margin-top:22px;display:flex}.report-buttons button{border:1px solid var(--line);background:#fff;border-radius:6px;justify-content:center;align-items:center;gap:6px;min-width:140px;min-height:44px;font-size:11px;font-weight:800;display:flex}.report-buttons button:last-child{border-color:var(--blue);background:var(--blue);color:#fff}@media (width<=860px){.header-inner{gap:10px;width:calc(100% - 28px);display:flex}.header-branding{flex:1}.corporate-logo{display:none}.main-nav{border-bottom:1px solid var(--line);background:#fff;height:auto;padding:8px 14px 13px;display:none;position:fixed;top:72px;left:0;right:0;box-shadow:0 10px 20px #17203314}.main-nav.open{display:grid}.main-nav button{border-radius:6px;justify-content:flex-start;min-height:44px}.main-nav button:after{display:none}.main-nav button.active{background:var(--blue-soft)}.mobile-menu-button{background:0 0;border:0;border-radius:6px;place-items:center;width:38px;height:38px;padding:0;display:grid}.brand{flex:1}.brand small{display:none}.header-actions{gap:7px}.avatar-button{display:none}.stage-switch{min-width:105px}.stage-popover{right:14px}.welcome-inner{min-height:250px}.math-visual{flex-basis:290px;width:290px;height:190px}.visual-paper{padding:20px}.resume-strip{grid-template-columns:42px minmax(0,1fr) auto}.resume-progress{display:none}.mode-tabs>button{grid-template-columns:40px minmax(0,1fr)}.mode-tabs>button>svg{display:none}.paper-cards{max-height:936px}.paper-card{grid-template-columns:68px minmax(0,1fr);height:180px;min-height:180px}.paper-card .outline-action{grid-column:1/-1;justify-content:center}.metrics-row,.report-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.profile-layout{grid-template-columns:1fr}.account-create-panel{grid-template-columns:repeat(2,minmax(0,1fr))}.account-create-panel>button{min-height:43px}.dashboard-layout{grid-template-columns:1fr}.student-directory-list{max-height:360px}.session-layout{grid-template-columns:1fr}.answer-sheet{z-index:50;max-height:75vh;display:none;position:fixed;inset:auto 10px 10px;overflow:auto;box-shadow:0 16px 45px #101c3340}.answer-sheet.open{display:block}.answer-sheet-head button{display:grid}}@media (width<=620px){body{background-position:58%;background-attachment:scroll}.login-page{padding:16px}.login-panel{padding:26px 22px}.login-brand{gap:8px}.login-brand>img{width:76px;margin-right:4px}.login-brand .brand-symbol{flex:0 0 34px}.login-brand strong{font-size:13px}.site-shell{background:#f4f6f961;padding-bottom:68px}.site-header{height:62px}.main-nav{top:62px}.header-inner{width:calc(100% - 22px)}.brand-symbol{width:34px;height:34px}.brand-symbol span{font-size:19px}.brand strong{font-size:16px}.stage-switch{min-width:91px;padding:5px 7px 5px 9px}.stage-switch small{display:none}.mobile-tabs{z-index:45;height:calc(64px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);border-top:1px solid var(--line);-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);background:#fffffff7;grid-template-columns:repeat(3,1fr);display:grid;position:fixed;bottom:0;left:0;right:0}.mobile-tabs button{color:#7d8797;background:0 0;border:0;flex-direction:column;justify-content:center;align-items:center;gap:3px;display:flex}.mobile-tabs button.active{color:var(--blue)}.mobile-tabs span{font-size:10px;font-weight:750}.welcome-inner{width:calc(100% - 28px);min-height:0;padding:28px 0 26px}.welcome-copy h1{margin-top:14px;font-size:29px}.welcome-copy>p{font-size:12px;line-height:1.6}.quick-stats{gap:13px;margin-top:21px}.quick-stats span{font-size:10px}.quick-stats strong{font-size:15px}.math-visual{display:none}.resume-strip{grid-template-columns:38px minmax(0,1fr) auto;width:calc(100% - 28px);min-height:72px;margin-top:14px;padding:10px}.resume-icon{width:36px;height:36px}.resume-strip>button{width:40px;padding:0;font-size:0}.resume-strip>button svg{margin:auto}.mode-section{width:calc(100% - 28px);padding:33px 0}.section-intro h2{font-size:23px}.section-intro p{max-width:255px;font-size:11px;line-height:1.6}.today-goal{display:none}.mode-tabs{grid-template-columns:repeat(3,1fr);gap:6px;margin-top:19px;padding-bottom:17px}.mode-tabs>button{text-align:center;flex-direction:column;justify-content:center;gap:6px;min-height:86px;padding:8px 4px;display:flex}.mode-tabs>button>span{width:34px;height:34px}.mode-tabs small{display:none}.mode-tabs strong{font-size:12px}.content-heading h3{font-size:16px}.content-heading p{max-width:270px;font-size:10px;line-height:1.6}.paper-cards{max-height:861px;padding-right:5px}.paper-card{grid-template-columns:58px minmax(0,1fr);gap:12px;height:165px;min-height:165px;padding:12px}.paper-year{width:56px;height:68px}.paper-info h3{font-size:13px}.paper-info>p{font-size:9px}.category-grid{grid-template-columns:1fr}.category-card{min-height:92px}.topic-heading{flex-direction:column;align-items:flex-start}.topic-heading label{width:100%}.topic-list>button{grid-template-columns:40px minmax(0,1fr) 18px;gap:10px}.topic-number{width:38px;height:38px}.topic-mastery{display:none}.tool-band{width:calc(100% - 28px);margin-top:0;padding:28px 0 38px}.tool-band h2{font-size:20px}.tool-links{grid-template-columns:1fr;margin-top:15px}.subpage{width:calc(100% - 28px);padding:32px 0 35px}.subpage-title h1{font-size:28px}.metrics-row{gap:7px;margin-top:20px}.metrics-row article{padding:14px}.metrics-row article strong{font-size:22px}.record-panel{padding:15px}.record-panel>button{grid-template-columns:38px minmax(0,1fr) 35px 16px}.profile-hero{grid-template-columns:58px minmax(0,1fr);gap:12px}.large-avatar{width:56px;height:56px}.profile-actions{flex-wrap:wrap;grid-column:1/-1}.profile-main{padding:16px}.asset-grid{grid-template-columns:1fr}.dashboard-heading{flex-direction:column;align-items:flex-start}.account-create-panel{grid-template-columns:1fr}.student-detail{padding:14px}.student-detail-head{grid-template-columns:50px minmax(0,1fr)}.student-detail-actions{grid-column:1/-1;justify-content:space-between}.student-detail-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.student-weekly-progress{grid-template-columns:1fr;gap:7px}.diagnostic-grid{grid-template-columns:1fr}.learning-progress-list article{grid-template-columns:1fr;padding:10px 0}.session-topbar{height:60px;padding:0 10px}.session-progress{top:60px}.session-layout{width:100%;padding:0 0 80px}.question-panel{border:0;border-radius:0;min-height:calc(100dvh - 63px);padding:21px 16px 92px}.question-toolbar>div{gap:10px;font-size:12px}.type-pill{padding:5px 8px}.question-toolbar>div>span:last-child{display:none}.question-number{margin-top:7px}.question-source{margin-top:12px;font-size:10px}.question-stem{margin-top:8px;font-size:18px;line-height:1.75}.image-content{overscroll-behavior-inline:contain;max-width:100%;overflow-x:auto}.image-content>p{width:max-content;min-width:100%}.image-content .question-image-crop{width:520px;max-width:none}.image-content .question-image-crop img{width:100%;max-width:100%}.session-options{margin-top:18px}.session-options button{min-height:48px}.question-actions{z-index:25;padding:10px 12px calc(10px + env(safe-area-inset-bottom));border-top:1px solid var(--line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#fffffff7;grid-template-columns:44px 44px minmax(0,1fr);position:fixed;bottom:0;left:0;right:0}.question-actions .previous,.question-actions .sheet-toggle{width:44px;padding:0;font-size:0}.report-page>main{padding-top:25px}.report-score{width:112px;height:112px;padding-top:28px}.report-score strong{font-size:36px}.report-hero h1{font-size:19px}.report-metrics{grid-template-columns:repeat(2,1fr)}.report-review>div:last-child{grid-template-columns:repeat(6,1fr)}.report-buttons{grid-template-columns:1fr 1fr;display:grid}.report-buttons button{min-width:0}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}