.mathfield-container{padding:20px;height:100%}.mathfield-card{padding:24px;height:auto;min-height:200px;display:flex;flex-direction:column}.mathfield-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.section-title{font-size:1rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:1px}math-field{--caret-color: var(--primary);--selection-background-color: var(--primary-hover);border-radius:8px;font-size:1.2rem;padding:8px;background:#ffffff0d}math-field:focus-within{outline:none;background:#ffffff14}.mathfield-actions{margin-top:20px;border-top:1px solid var(--glass-border);padding-top:15px;display:flex;justify-content:flex-end;gap:12px}.hint{font-size:.8rem;color:var(--text-secondary)}@media (max-width: 600px){.mathfield-container{padding:1rem}.mathfield-header{flex-direction:column;align-items:flex-start;gap:.75rem}.mathfield-actions{width:100%;justify-content:flex-end;padding-top:.75rem;gap:.5rem}}.ocr-container{padding:20px;display:flex;flex-direction:column;gap:20px;overflow-y:auto;height:100%}.ocr-hero{padding:40px 24px;display:flex;flex-direction:column;align-items:center;text-align:center}.scan-icon-wrapper{position:relative;width:80px;height:80px;background:#6366f11a;border-radius:20px;display:flex;align-items:center;justify-content:center;margin-bottom:24px;overflow:hidden;border:1px solid var(--glass-border)}.scan-icon{color:var(--primary)}.scan-line{position:absolute;left:0;right:0;height:2px;background:var(--primary);box-shadow:0 0 10px var(--primary)}.ocr-hero h2{margin-bottom:12px}.ocr-hero p{color:var(--text-secondary);font-size:.9rem;margin-bottom:32px;line-height:1.5}.ocr-actions{display:flex;flex-direction:column;gap:12px;width:100%}.main-action{display:flex;align-items:center;justify-content:center;gap:10px;height:56px;font-size:1.1rem}.btn-secondary{background:var(--glass-bg);border:1px solid var(--glass-border);color:#fff;padding:12px 24px;border-radius:12px;font-weight:600;display:flex;align-items:center;justify-content:center;gap:10px;height:56px}.ocr-tips{padding:20px}.ocr-tips h3{font-size:.9rem;color:var(--text-secondary);text-transform:uppercase;margin-bottom:15px}.ocr-tips ul{list-style:none;font-size:.85rem;color:#cbd5e1}.ocr-tips li{margin-bottom:8px;display:flex;align-items:center;gap:8px}.ocr-tips li:before{content:"•";color:var(--accent);font-weight:700}.error-message{margin-top:15px;color:#f87171;font-size:.8rem;display:flex;align-items:center;gap:5px}.btn-secondary.recording-active{background:#ff444426;border-color:#f44;color:#f44}@keyframes pulse-mobile{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.recording-active{animation:pulse-mobile 1.5s infinite}@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{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.27"}.katex .katex-mathml{clip:rect(1px,1px,1px,1px);border:0;height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.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;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .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 .clap,.katex .llap,.katex .rlap{position:relative;width:0}.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;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.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:.8333333333em}.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:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.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:1.6666666667em}.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:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.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:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.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:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.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:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.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:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.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:.4166666667em}.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:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.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:.8333333333em}.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:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.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:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.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:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.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:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.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:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.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{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .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{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}.chat-container{display:flex;flex-direction:column;height:100%;padding:10px;gap:10px}.chat-header{padding:10px 15px;display:flex;align-items:center;gap:8px;font-size:.8rem;color:var(--text-secondary);border-radius:12px}.sparkle-icon{color:var(--accent)}.messages-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:15px;padding:5px}.message-wrapper{display:flex;gap:10px;max-width:85%}.message-wrapper.user{align-self:flex-end;flex-direction:row-reverse}.avatar{width:30px;height:30px;border-radius:50%;background:var(--glass-bg);border:1px solid var(--glass-border);display:flex;align-items:center;justify-content:center;flex-shrink:0}.message-bubble{padding:12px 16px;border-radius:18px;font-size:.95rem;line-height:1.4}.user .message-bubble{background:linear-gradient(135deg,var(--primary),var(--accent));border:none}.chat-input-area{padding:8px;display:flex;gap:10px;border-radius:15px;margin-bottom:5px}.chat-input-area input{flex:1;background:transparent;border:none;color:#fff;padding:10px;font-size:.95rem}.chat-input-area input:focus{outline:none}.send-btn{width:40px;height:40px;border-radius:10px;background:var(--primary);border:none;color:#fff;display:flex;align-items:center;justify-content:center}.message-bubble table{border-collapse:collapse;width:100%;margin:10px 0;font-size:.8rem;overflow-x:auto;display:block;background:#ffffff0d;border-radius:8px}.message-bubble th,.message-bubble td{border:1px solid var(--glass-border);padding:8px 10px;text-align:left;min-width:80px}.message-bubble th{background:#ffffff26;font-weight:600;color:var(--accent)}.user .message-bubble th,.user .message-bubble td{border-color:#fff3}.user .message-bubble th{background:#ffffff1a;color:#fff}.message-wrapper.has-graph .message-bubble{background:#ffffff14;border-left:3px solid var(--accent)}.mobile-svg-wrapper{margin:12px 0;padding:10px;background:#ffffff0d;border-radius:12px;display:flex;justify-content:center;border:1px solid rgba(255,255,255,.1)}.mobile-svg-wrapper svg{max-width:100%;height:auto}.message-bubble h2,.message-bubble h3{margin-top:5px;font-size:1.1rem;color:var(--accent);border-bottom:1px solid var(--glass-border);padding-bottom:5px;margin-bottom:10px}.video-selector-container{padding:20px;display:flex;flex-direction:column;gap:15px}.video-tabs{display:flex;gap:8px;overflow-x:auto;padding-bottom:5px;scrollbar-width:none}.video-tabs::-webkit-scrollbar{display:none}.video-tab-btn{display:flex;align-items:center;gap:8px;padding:8px 16px;border-radius:20px;border:1px solid var(--glass-border);background:var(--glass-bg);color:var(--text-secondary);white-space:nowrap;font-size:.85rem;font-weight:500;transition:all .3s ease}.video-tab-btn.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 4px 12px #6366f14d}.mobile-video-card{overflow:hidden;display:flex;flex-direction:column}.video-viewport{position:relative;width:100%;aspect-ratio:16/9;background:#000}.mobile-video-element{width:100%;height:100%;object-fit:contain}.video-overlay{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;align-items:center;justify-content:center;background:#0000004d;cursor:pointer}.play-icon-wrapper{width:60px;height:60px;background:var(--primary);border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px #0006;transition:transform .2s}.play-icon-wrapper:active{transform:scale(.9)}.video-bottom-info{padding:15px 20px;display:flex;justify-content:space-between;align-items:center}.video-status{display:flex;align-items:center;gap:10px;font-size:.85rem;color:var(--text-secondary)}.status-dot{width:8px;height:8px;border-radius:50%;background:#10b981}.status-dot.pulse{animation:pulse 1.5s infinite}@keyframes pulse{0%{transform:scale(1);opacity:1}50%{transform:scale(1.5);opacity:.5}to{transform:scale(1);opacity:1}}.video-action-btn{width:40px;height:40px;border-radius:50%;background:var(--glass-bg);border:1px solid var(--glass-border);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer}.user-menu-mobile{position:relative}.hamburger-mobile{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);color:#fff;padding:10px;border-radius:12px;cursor:pointer;display:flex;align-items:center;position:relative;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.icon-btn-auth{background:linear-gradient(135deg,#6366f1,#a855f7);color:#fff;padding:10px 20px;border-radius:14px;border:none;cursor:pointer;font-weight:700;box-shadow:0 4px 15px #6366f14d;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;align-items:center;gap:8px}.icon-btn-auth:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f166;filter:brightness(1.1)}.icon-btn-auth:active{transform:translateY(0)}.notification-dot{position:absolute;top:-2px;right:-2px;width:12px;height:12px;background:#ef4444;border-radius:50%;border:2px solid #1a1a2e}.mobile-sidebar-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#0f172a80;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:2000;opacity:0;visibility:hidden;transition:all .3s ease}.mobile-sidebar-overlay.open{opacity:1;visibility:visible}.mobile-sidebar-drawer{position:absolute;top:0;left:0;width:85%;max-width:300px;height:100%;background:#fff;box-shadow:10px 0 40px #0003;display:flex;flex-direction:column;transform:translate(-100%);transition:transform .4s cubic-bezier(.16,1,.3,1)}.rtl .mobile-sidebar-drawer{left:auto;right:0;transform:translate(100%)}.mobile-sidebar-overlay.open .mobile-sidebar-drawer{transform:translate(0)}.mobile-drawer-header{height:64px;padding:0 20px;background:#4f46e5;color:#fff;display:flex;align-items:center;justify-content:space-between}.mobile-drawer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1rem;letter-spacing:.5px}.mobile-close-btn{background:#ffffff26;border:none;color:#fff;padding:6px;border-radius:50%}.mobile-drawer-content{flex:1;overflow-y:auto;padding:20px}.mobile-user-card{background:#f8fafc;padding:16px;border-radius:20px;display:flex;align-items:center;gap:12px;margin-bottom:24px;border:1px solid #f1f5f9}.mobile-avatar{width:44px;height:44px;background:#e0f2fe;color:#0284c7;border-radius:12px;display:flex;align-items:center;justify-content:center}.mobile-username{font-weight:800;font-size:.95rem;color:#1e293b;margin:0}.mobile-badge-row{display:flex;gap:6px;margin-top:4px}.mobile-info-badge{font-size:.65rem;font-weight:700;color:#64748b;background:#fff;padding:2px 8px;border-radius:6px;border:1px solid #f1f5f9;display:flex;align-items:center;gap:4px}.mobile-drawer-section{margin-bottom:24px}.mobile-drawer-section.border-top{border-top:1px solid #f1f5f9;padding-top:20px}.mobile-section-title-premium{font-size:.7rem;font-weight:900;text-transform:uppercase;color:#94a3b8;letter-spacing:1px;margin-bottom:12px}.mobile-subjects-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mobile-subject-btn{background:#fcfcfd;border:1px solid #f1f5f9;padding:10px;border-radius:16px;display:flex;align-items:center;gap:8px;font-size:.8rem;font-weight:600;color:#475569;text-align:left}.rtl .mobile-subject-btn{text-align:right;flex-direction:row-reverse}.mobile-icon-box{width:28px;height:28px;background:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#94a3b8}.mobile-actions-list{display:flex;flex-direction:column;gap:8px}.mobile-action-item{width:100%;padding:14px;background:#f8fafc;border:none;border-radius:16px;display:flex;align-items:center;gap:12px;font-size:.9rem;font-weight:600;color:#334155}.rtl .mobile-action-item{flex-direction:row-reverse}.mobile-action-item.logout{color:#ef4444;background:#fef2f2}.mobile-warn-dot{margin-left:auto;background:#f59e0b;color:#fff;width:16px;height:16px;border-radius:50%;font-size:.6rem;display:flex;align-items:center;justify-content:center}.rtl .mobile-warn-dot{margin-left:0;margin-right:auto}.mobile-drawer-footer{padding:20px;background:#f8fafc;text-align:center;border-top:1px solid #f1f5f9}.mobile-ft-brand{font-size:.75rem;font-weight:900;color:#cbd5e1;letter-spacing:1.5px;margin-bottom:2px}.mobile-ft-version{font-size:.6rem;color:#e2e8f0}.profile-modal-mobile .modal-content{border-radius:24px;padding:24px}.modal-actions{display:flex;gap:10px;margin-top:20px}.save-btn,.cancel-btn{flex:1;padding:14px;border-radius:12px;font-weight:700;border:none}.save-btn{background:#4f46e5;color:#fff}.cancel-btn{background:#f3f4f6;color:#64748b}.rtl{direction:rtl}.ltr{direction:ltr}.course-browser{display:flex;flex-direction:column;height:100%;background:#fff;padding:0;overflow:hidden}.browser-header{padding:24px;background:#f8fafc;border-bottom:2px solid #f1f5f9}.browser-header h3{margin:0;font-size:1.25rem;font-weight:700;color:#1a1a2e}.browser-subtitle{margin:4px 0 0;font-size:.875rem;color:#64748b}.lesson-tree{flex:1;overflow-y:auto;padding:16px}.lesson-group{margin-bottom:8px;border-radius:12px;border:1px solid #e2e8f0;overflow:hidden;transition:all .2s ease}.lesson-group.expanded{border-color:#3b82f6;background:#fdfdfe}.lesson-header{padding:16px;display:flex;align-items:center;justify-content:space-between;cursor:pointer;background:#fff;-webkit-user-select:none;user-select:none;transition:background .2s}.lesson-header:hover{background:#f8fafc}.lesson-title-area{display:flex;align-items:center;gap:12px}.lesson-icon{color:#3b82f6}.lesson-name{font-weight:600;color:#1e293b;font-size:1rem}.lesson-content{display:none;padding:4px 12px 12px;border-top:1px solid #f1f5f9}.expanded .lesson-content{display:block}.plan-item{display:flex;align-items:center;gap:12px;padding:12px;border-radius:8px;cursor:pointer;transition:all .2s;margin-top:4px}.plan-item:hover{background:#eff6ff}.plan-item-icon{width:32px;height:32px;border-radius:8px;background:#f1f5f9;color:#64748b;display:flex;align-items:center;justify-content:center}.plan-item:hover .plan-item-icon{background:#3b82f6;color:#fff}.plan-item-info{display:flex;flex-direction:column}.plan-item-title{font-size:.9375rem;font-weight:500;color:#334155}.plan-item-meta{font-size:.75rem;color:#94a3b8;text-transform:uppercase;letter-spacing:.025em}.browser-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;padding:40px;color:#64748b;gap:12px}.browser-state.error{color:#ef4444}.no-items{font-size:.875rem;color:#94a3b8;text-align:center;padding:16px;margin:0}.course-reader{display:flex;flex-direction:column;height:100%;background:#f8fafc;position:relative;z-index:10}.reader-header{display:flex;align-items:center;gap:12px;padding:12px 16px;background:#fff;border-bottom:1px solid #e2e8f0;flex-shrink:0;position:sticky;top:0;z-index:100}.header-center{flex:1;overflow:hidden}.course-title-header{font-size:1rem;color:#0f172a;margin:0;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.back-btn{display:flex;align-items:center;gap:4px;background:#f1f5f9;border:none;color:#475569;padding:6px 12px;border-radius:10px;font-size:.85rem;font-weight:600}.edit-btn{background:#eff6ff;color:#2563eb;border:none;padding:8px 12px;border-radius:10px;display:flex;align-items:center;gap:6px;font-weight:700;font-size:.85rem}.edit-actions{display:flex;gap:8px}.save-btn{background:#2563eb;color:#fff;border:none;padding:8px 12px;border-radius:10px;display:flex;align-items:center;gap:6px;font-weight:700;font-size:.85rem}.cancel-btn{background:#f1f5f9;color:#64748b;border:none;padding:8px 12px;border-radius:10px;display:flex;align-items:center;gap:6px;font-weight:700;font-size:.85rem}.reader-scroll-area{flex:1;overflow-y:auto;background:#fff;-webkit-overflow-scrolling:touch}.editing-mode .reader-scroll-area{display:flex;flex-direction:column}.editor-container{display:flex;flex-direction:column;height:100%}.editor-pane{height:40vh;border-bottom:2px solid #e2e8f0}.editor-pane textarea{width:100%;height:100%;padding:16px;border:none;resize:none;font-family:inherit;font-size:1rem;color:#0f172a;background:#fdfdfd;outline:none}.preview-pane{flex:1;padding:20px;background:#fff;position:relative;overflow-y:auto}.preview-badge{position:sticky;top:-10px;right:0;background:#f8fafc;color:#64748b;font-size:.7rem;font-weight:800;padding:4px 10px;border-radius:8px;width:fit-content;margin-bottom:10px;border:1px solid #e2e8f0;display:flex;align-items:center;gap:4px}.edit-error{background:#fef2f2;color:#ef4444;padding:10px 16px;margin:10px;border-radius:8px;font-size:.85rem;font-weight:600;border:1px solid #fee2e2}.reader-content{padding:24px 20px 151px}.svg-illustration{margin:20px 0;background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:12px;display:flex;justify-content:center;overflow-x:auto}.inline-tableau{margin:20px 0;border:1px solid #e2e8f0;border-radius:12px;overflow-x:auto}.inline-graph-analysis{margin:24px 0;padding:20px;background:#f8fafc;border-left:4px solid #3b82f6;border-radius:0 12px 12px 0}.math-formula{color:#1e40af;font-weight:600}.block-math{display:block;margin:1.5rem auto;padding:15px;background:#f1f5f9;border-radius:8px;overflow-x:auto;text-align:center}.reader-footer-nav{display:flex;justify-content:space-between;gap:16px;margin-top:40px}.nav-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:12px;background:#fff;border:1px solid #e2e8f0;border-radius:12px;color:#475569;font-weight:700;font-size:.9rem}.nav-btn:disabled{opacity:.5}.mobile-app-container{display:flex;flex-direction:column;height:100vh;height:-webkit-fill-available;padding-top:var(--safe-top);padding-bottom:calc(var(--safe-bottom) + 80px)}.app-header{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:#0f172a66;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);z-index:100;position:relative;border-bottom:1px solid rgba(255,255,255,.08)}.header-logo{display:flex;align-items:center;gap:10px}.subject-indicator{position:absolute;bottom:-15px;left:50%;transform:translate(-50%);background:var(--accent);color:#fff;font-size:.65rem;font-weight:800;padding:2px 10px;border-radius:10px;box-shadow:0 2px 8px #0000004d}.logo-icon{color:var(--accent)}.brand-font{font-size:1.25rem;font-weight:800;letter-spacing:-.5px;background:linear-gradient(to right,#fff,#94a3b8);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.settings-btn{background:var(--glass-bg);border:1px solid var(--glass-border);color:#fff;padding:8px;border-radius:10px}.content-area{flex:1;overflow:hidden;position:relative}.tab-content{height:100%;width:100%}.bottom-nav{position:fixed;bottom:20px;left:20px;right:20px;height:70px;display:grid;z-index:100;border-radius:20px;padding:0 10px}.nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;background:none;border:none;color:var(--text-secondary);gap:4px;transition:color .3s}.nav-item.active{color:#fff}.nav-item span{font-size:.7rem;font-weight:500}.nav-icon-wrapper{position:relative;padding:4px}.nav-active-indicator{position:absolute;top:-4px;left:-4px;right:-4px;bottom:-4px;background:#6366f133;border-radius:12px;z-index:-1}.full-tab-content{height:100%;width:100%;display:flex;flex-direction:column}.sub-tab-container{flex:1;display:flex;flex-direction:column;min-height:0}.sub-tabs-header{display:flex;gap:10px;padding:12px 20px;background:#0f172a33;overflow-x:auto;white-space:nowrap;-ms-overflow-style:none;scrollbar-width:none}.sub-tabs-header::-webkit-scrollbar{display:none}.sub-tabs-header button{background:#ffffff08;border:1px solid rgba(255,255,255,.08);color:var(--text-secondary);padding:8px 20px;border-radius:14px;font-size:.85rem;font-weight:700;transition:all .3s cubic-bezier(.4,0,.2,1)}.sub-tabs-header button.active{background:linear-gradient(135deg,#6366f1,#a855f7);color:#fff;border:none;box-shadow:0 4px 12px #6366f14d;transform:translateY(-1px)}.sub-tab-content{flex:1;overflow-y:auto}.mobile-home-space{height:100%;display:flex;align-items:center;justify-content:center;padding:20px}.mobile-quick-actions{margin-top:30px}.mobile-action-card{background:var(--glass-bg);border:1px solid var(--glass-border);padding:30px;border-radius:20px;display:flex;flex-direction:column;align-items:center;gap:15px;color:#fff;text-align:center}.mobile-placeholder{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff9;text-align:center;gap:20px}.full-tab-content>.course-browser{margin:10px;background:#fff;border-radius:15px;flex:1;overflow:hidden}:root{--primary: #6366f1;--primary-hover: #4f46e5;--secondary: #ec4899;--accent: #8b5cf6;--bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);--glass-bg: rgba(255, 255, 255, .08);--glass-border: rgba(255, 255, 255, .12);--text-primary: #f8fafc;--text-secondary: #94a3b8;--safe-top: env(safe-area-inset-top);--safe-bottom: env(safe-area-inset-bottom)}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}body{font-family:Inter,system-ui,-apple-system,sans-serif;background:var(--bg-gradient);color:var(--text-primary);min-height:100vh;overflow-x:hidden}h1,h2,h3,.brand-font{font-family:Outfit,sans-serif}.glass-card{background:var(--glass-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:24px}.btn-primary{background:linear-gradient(to right,var(--primary),var(--accent));color:#fff;border:none;padding:12px 24px;border-radius:12px;font-weight:600;cursor:pointer;transition:transform .2s,opacity .2s}.btn-primary:active{transform:scale(.95);opacity:.9}.fade-in{animation:fadeIn .5s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
