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button{color:inherit;background:0 0;border:0;padding:0}.loading-splash{--splash-ink:#5f76a2;--splash-loader:#667da9;--splash-orb-size:clamp(38rem, 168vmin, 88rem);isolation:isolate;min-block-size:100dvh;inline-size:100%;padding:max(24px, env(safe-area-inset-top)) max(20px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));color:var(--splash-ink);text-align:center;background:#f5f7fb;place-items:center;display:grid;position:relative;overflow:hidden}.loading-splash--dark{--splash-ink:#afc1ea;--splash-loader:#a4b8e6;background:#04132f}.loading-splash__orb{inline-size:var(--splash-orb-size);aspect-ratio:1;z-index:-1;pointer-events:none;border-radius:50%;position:absolute;transform:translate(0)}.loading-splash__orb--blue{background:radial-gradient(circle at 32% 29%,#fffffff2 0 3%,#0000 25%),radial-gradient(circle at 61% 65%,#e4f3ff 0 17%,#b9ddff 46%,#529ef3 73%,#1685ee 100%);border:1px solid #e9f8ffe6;animation:.82s 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#3781db2e}.loading-splash__orb--blue:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){left:calc(-1*clamp(12rem,57vmin,30rem))}.loading-splash__orb--blue:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){left:calc(-1*clamp(12rem,57vmin,30rem))}.loading-splash__orb--blue:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){right:calc(-1*clamp(12rem,57vmin,30rem))}.loading-splash__orb--blue:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){right:calc(-1*clamp(12rem,57vmin,30rem))}.loading-splash__orb--orange{background:radial-gradient(circle at 68% 66%,#ffffffd1 0 4%,#0000 23%),radial-gradient(circle at 40% 34%,#fff0cf 0 16%,#ffd08d 46%,#ffad31 76%,#ef8a18 100%);border:1px solid #fff5d5eb;animation:.82s cubic-bezier(.2,.86,.24,1.08) .13s both loading-splash-orange-enter;bottom:calc(27dvh - var(--splash-orb-size));box-shadow:0 0 clamp(24px,7vmin,82px) #ff972b40,inset 18px 22px 45px #ffebb338}.loading-splash__orb--orange:not(:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){right:calc(-1*clamp(12rem,57vmin,30rem))}.loading-splash__orb--orange:not(:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi))){right:calc(-1*clamp(12rem,57vmin,30rem))}.loading-splash__orb--orange:-webkit-any(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){left:calc(-1*clamp(12rem,57vmin,30rem))}.loading-splash__orb--orange:is(:lang(ae),:lang(ar),:lang(arc),:lang(bcc),:lang(bqi),:lang(ckb),:lang(dv),:lang(fa),:lang(glk),:lang(he),:lang(ku),:lang(mzn),:lang(nqo),:lang(pnb),:lang(ps),:lang(sd),:lang(ug),:lang(ur),:lang(yi)){left:calc(-1*clamp(12rem,57vmin,30rem))}.loading-splash--dark .loading-splash__orb--blue{background:radial-gradient(circle at 38% 29%,#1769ffd1 0 18%,#0937a0f2 55%,#031541 100%);border-color:#3688fff2;box-shadow:0 0 clamp(34px,9vmin,112px) #1469ffa8,inset -22px -28px 54px #00041eb8}.loading-splash--dark .loading-splash__orb--orange{background:radial-gradient(circle at 63% 66%,#cf4715cc 0 19%,#671f14f0 54%,#171027 100%);border-color:#ff841ff5;box-shadow:0 0 clamp(34px,9vmin,112px) #ff681296,inset 20px 24px 54px #1c0407bf}.loading-splash__content{z-index:1;justify-items:center;gap:clamp(15px,2.1vh,23px);margin-block-end:clamp(0px,2dvh,22px);animation:.68s cubic-bezier(.2,.8,.25,1) .17s both loading-splash-content-enter;display:grid;position:relative}.loading-splash__icon{border-radius:27%;block-size:auto;inline-size:clamp(5.5rem,25vmin,6.75rem);display:block;box-shadow:0 16px 35px #1d57ae33}.loading-splash--dark .loading-splash__icon{box-shadow:0 0 25px #247dff9e,0 17px 42px #00000075}.loading-splash__loader{aspect-ratio:1;border:3px solid var(--splash-loader);inline-size:clamp(36px,10vmin,46px);display:block}@supports (color:color-mix(in lab, red, red)){.loading-splash__loader{border:3px solid color-mix(in srgb, var(--splash-loader) 28%, transparent)}}.loading-splash__loader{border-inline-start-color:var(--splash-loader);border-radius:50%;animation:1.05s linear infinite spin}.loading-splash__status{max-inline-size:min(100%,22rem);color:var(--splash-ink);letter-spacing:-.025em;margin:0;font-size:clamp(17px,4.5vw,22px);font-weight:700;line-height:1.35;display:block}@keyframes loading-splash-blue-enter{0%{opacity:0;transform:translate(-13%,-13%)scale(.95)}to{opacity:1;transform:translate(0)scale(1)}}@keyframes loading-splash-orange-enter{0%{opacity:0;transform:translate(13%,13%)scale(.95)}to{opacity:1;transform:translate(0)scale(1)}}@keyframes loading-splash-content-enter{0%{opacity:0;transform:translateY(10px)scale(.88)}to{opacity:1;transform:translateY(0)scale(1)}}.fatal-error{min-height:100dvh;color:var(--muted);background:var(--tg-bg);text-align:center;align-content:center;place-items:center;gap:13px;display:grid}.topic-loading{min-height:330px;color:var(--muted);align-content:center;place-items:center;gap:12px;display:grid}.topic-loading p{margin:0;font-size:13px}.fatal-error .brand-mark{margin-bottom:5px}.fatal-error p{margin:0;font-size:13px}.fatal-error h1{color:var(--ink);letter-spacing:-.04em;margin:0;font-size:25px}.fatal-error button{color:#fff;background:var(--blue);border:0;border-radius:10px;min-height:42px;padding:0 16px;font-weight:800}.bottom-nav{display:none}.compact-topbar{height:calc(56px + env(safe-area-inset-top));padding-top:env(safe-area-inset-top)}.compact-topbar .topbar-spacer{flex:1}.compact-topbar .streak{display:none}.compact-topbar+.app-layout .main-content{padding-top:34px}.immersive-shell{height:100dvh;min-height:100dvh;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);overflow:hidden}.immersive-shell .assistant-chat-screen{height:100%}.immersive-shell--assistant{padding-top:0;padding-bottom:0}.page-actions{align-items:center;gap:4px;display:inline-flex}.sessions-loading{min-height:180px;color:var(--muted);justify-content:center;align-items:center;gap:9px;font-size:13px;display:flex}.session-list{gap:9px;display:grid}.session-card{width:100%;min-height:70px;color:var(--ink);text-align:left;align-items:center;gap:12px;padding:13px 14px;transition:all .18s;display:flex}.session-card:hover{border-color:#bdc6ff;transform:translate(2px)}.session-card-main{min-width:0;color:inherit;text-align:left;background:0 0;border:0;flex:1;align-items:center;gap:12px;padding:0;display:flex}.session-delete{color:#b77a63;background:0 0;border:0;border-radius:9px;flex:none;justify-content:center;align-items:center;width:34px;height:34px;display:inline-flex}.session-delete:hover{color:#a95432;background:#fff0e8}.session-icon{width:36px;height:36px;color:var(--blue-dark);background:var(--soft-blue);border-radius:11px;flex:none;justify-content:center;align-items:center;display:inline-flex}.session-copy{flex:1;gap:4px;min-width:0;display:grid}.session-copy strong{text-overflow:ellipsis;white-space:nowrap;font-size:13px;overflow:hidden}.session-copy small{color:#96a2b5;font-size:10px}.session-card>svg{color:#a7b3c4}.action-sheet-backdrop{z-index:35;background:#111d3070;place-items:center;padding:18px;display:grid;position:fixed;top:0;bottom:0;left:0;right:0}.action-sheet{border:1px solid var(--line);background:#fff;border-radius:18px;width:min(100%,440px);margin:0;overflow:hidden;box-shadow:0 24px 70px #111d3042}.action-sheet-head{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:16px 18px 12px;display:flex}.action-sheet-head h3{color:var(--ink);letter-spacing:-.03em;margin:0;font-size:16px}.action-sheet-body{gap:5px;padding:10px;display:grid}.action-sheet-row,.action-sheet-danger{color:#66758b;text-align:left;background:0 0;border:0;border-radius:10px;align-items:center;gap:10px;min-height:48px;padding:0 11px;font-size:13px;font-weight:750;display:flex}.action-sheet-row:hover{color:var(--blue-dark);background:var(--soft-blue)}.action-sheet-row span,.action-sheet-danger span{flex:1}.action-sheet-danger{color:#b1603c}.action-sheet-danger:hover{background:#fff1e9}.delete-confirm{text-align:center;justify-items:center;padding:10px 8px 5px;display:grid}.delete-icon{color:#b1603c;background:#fff0e8;border-radius:15px;justify-content:center;align-items:center;width:50px;height:50px;margin-bottom:13px;display:inline-flex}.delete-confirm h3{color:var(--ink);margin:0;font-size:18px}.delete-confirm p{color:var(--muted);margin:8px 0 18px;font-size:12px;line-height:1.5}.delete-actions{grid-template-columns:1fr 1.2fr;gap:8px;width:100%;display:grid}.danger-btn{color:#fff;box-shadow:none;background:#c36d48}.danger-btn:hover:not(:disabled){background:#a95432}.assistant-chat-screen{flex-direction:column;min-height:0;padding:10px max(16px,50vw - 390px) 0;display:flex}.assistant-chat-header{align-items:center;gap:10px;min-height:50px;display:flex}.assistant-chat-header .back-link{margin:0}.assistant-chat-title{flex:1;gap:2px;min-width:0;display:grid}.assistant-chat-title span{color:#8e9aae;text-transform:uppercase;letter-spacing:.08em;font-size:10px;font-weight:800}.assistant-chat-title strong{color:var(--ink);text-overflow:ellipsis;white-space:nowrap;font-size:14px;overflow:hidden}.assistant-chat-screen .assistant-context{margin:5px 0 8px}.assistant-chat-screen .chat-window{border-radius:14px;flex:1;min-height:0;max-height:none}.assistant-chat-screen .chat-composer{flex:none;margin-bottom:8px}.assistant-chat-shell .assistant-chat-back{align-self:flex-start;min-height:32px;margin:0 0 6px}.assistant-chat-shell .chat-window{box-shadow:none;background:0 0;border:0}.drawer-backdrop,.panel-backdrop{z-index:25;background:#131f365c;position:fixed;top:0;bottom:0;left:0;right:0}.drawer-backdrop{justify-content:flex-end;display:flex}.profile-menu-backdrop{--profile-menu-top:calc(var(--tg-brand-header-top) + 76px);padding:var(--profile-menu-top) max(12px, var(--tg-content-safe-right)) max(12px, var(--tg-content-safe-bottom)) max(12px, var(--tg-content-safe-left));align-items:flex-start}.drawer.drawer--compact{height:auto;width:min(360px, calc(100vw - max(12px, var(--tg-content-safe-left)) - max(12px, var(--tg-content-safe-right))));max-height:calc(100dvh - var(--profile-menu-top) - max(12px, var(--tg-content-safe-bottom)));border:1px solid var(--line);border-radius:18px;overflow-y:auto}.drawer{background:#fff;flex-direction:column;width:min(360px,90vw);height:100%;padding:24px 18px;animation:.2s ease-out drawer-in;display:flex;box-shadow:-16px 0 40px #15233c29}@keyframes drawer-in{0%{opacity:.6;transform:translate(18px)}to{opacity:1;transform:translate(0)}}.drawer-head,.drawer-user{align-items:center;display:flex}.drawer-head{border-bottom:1px solid var(--line);justify-content:space-between;gap:15px;padding:0 4px 24px}.drawer-user{gap:11px}.drawer-user>span:last-child{gap:4px;display:grid}.drawer-user strong{font-size:14px}.drawer-user small{color:#929db0;text-overflow:ellipsis;white-space:nowrap;max-width:220px;font-size:11px;overflow:hidden}.avatar.large{width:42px;height:42px}.drawer-links{gap:5px;padding-top:20px;display:grid}.drawer-links button,.drawer-logout{color:#61718a;text-align:left;background:0 0;border:0;border-radius:11px;align-items:center;gap:12px;min-height:49px;padding:0 10px;font-size:13px;font-weight:750;display:flex}.drawer-links button:hover,.drawer-logout:hover{color:var(--blue-dark);background:var(--soft-blue)}.drawer-links button span{flex:1}.drawer-bottom{border-top:1px solid var(--line);margin-top:auto;padding-top:17px}.drawer-logout{color:#b36642;width:100%}.panel-backdrop{z-index:28;place-items:center;padding:20px;display:grid}.info-panel{background:#fff;border:0;border-radius:19px;width:min(100%,480px);margin:0;padding:26px;box-shadow:0 25px 70px #15233c38}.panel-head{justify-content:space-between;align-items:start;gap:15px;display:flex}.panel-head h2{letter-spacing:-.05em;margin:0;font-size:25px}.profile-panel-content{text-align:center;justify-items:center;padding:25px 0 3px;display:grid}.profile-avatar{width:68px;height:68px;margin-bottom:14px;font-size:22px}.profile-panel-content h3{margin:0;font-size:18px}.profile-panel-content>p{color:var(--muted);margin:5px 0 24px;font-size:13px}.profile-row{border-top:1px solid var(--line);color:#8b98ab;justify-content:space-between;gap:14px;width:100%;padding:13px 0;font-size:12px;display:flex}.profile-row strong{color:var(--ink);font-size:12px}.settings-list{padding-top:20px}.settings-list>div{border-bottom:1px solid var(--line);min-height:53px;color:var(--ink);justify-content:space-between;align-items:center;gap:12px;font-size:12px;display:flex}.settings-list>div span{color:#7f8da2;align-items:center;gap:9px;display:inline-flex}.settings-list>div strong{font-size:12px}.settings-list>p{color:var(--muted);margin:17px 0 0;font-size:12px;line-height:1.5}.theme-choice{gap:5px;display:inline-flex}.theme-choice button{border:1px solid var(--line);min-height:30px;color:var(--muted);background:0 0;border-radius:8px;padding:0 9px;font-size:11px;font-weight:800}.theme-choice button.active{color:var(--blue-dark);background:var(--soft-blue);border-color:#aeb8ff}.app-version{padding:0 24px calc(12px + env(safe-area-inset-bottom));color:var(--muted);text-align:center;font-size:11px}.auth-shell{background:var(--tg-bg);place-items:center;min-height:100vh;padding:24px;display:grid}.auth-card{border:1px solid var(--line);background:#fff;border-radius:22px;width:min(100%,430px);padding:34px 30px 29px;box-shadow:0 15px 45px #1f355812}.auth-brand{letter-spacing:-.04em;align-items:center;gap:10px;margin-bottom:42px;font-size:20px;font-weight:800;display:inline-flex}.auth-card h1{color:var(--ink);letter-spacing:-.055em;margin:0;font-size:31px}.auth-subtitle{color:var(--muted);margin:10px 0 25px;font-size:13px;line-height:1.55}.auth-card form{gap:14px;display:grid}.auth-card label{color:#718098;gap:7px;font-size:11px;font-weight:800;display:grid}.auth-card input{border:1px solid var(--line);width:100%;min-height:45px;color:var(--ink);background:#fbfcfe;border-radius:10px;outline:0;padding:0 12px;font-size:13px}.auth-card input:focus{border-color:#aeb8ff;box-shadow:0 0 0 3px #5b6ef51a}.auth-error,.auth-notice{border-radius:9px;padding:10px 12px;font-size:12px;line-height:1.45}.auth-error{color:#a95f39;background:#fff1e9}.auth-notice{color:#607719;background:#f0f7dc}.auth-links{justify-content:space-between;gap:10px;margin-top:18px;display:flex}.auth-links button{color:var(--blue-dark);background:0 0;border:0;padding:4px 0;font-size:11px;font-weight:800}.assistant-page{max-width:780px}.assistant-head{justify-content:space-between;align-items:center;display:flex}.assistant-actions{gap:2px;display:flex}.assistant-title{align-items:center;gap:13px;margin:6px 0 22px;display:flex}.assistant-orb{width:46px;height:46px;color:var(--blue-dark);background:var(--soft-blue);border-radius:14px;flex:none;justify-content:center;align-items:center;display:inline-flex}.assistant-title .eyebrow{margin-bottom:4px}.assistant-title h1{color:var(--ink);letter-spacing:-.05em;margin:0;font-size:28px}.assistant-title p:last-child{color:var(--muted);margin:5px 0 0;font-size:12px}.assistant-context{color:#6e7e98;background:#f0f3fb;border-radius:9px;align-items:center;gap:7px;margin-bottom:12px;padding:9px 11px;font-size:11px;display:flex}.assistant-context svg{color:var(--blue)}.assistant-context span{color:var(--ink);text-overflow:ellipsis;white-space:nowrap;font-weight:800;overflow:hidden}.chat-window{min-height:390px;max-height:560px;padding:19px;overflow-y:auto}.chat-empty{color:#98a4b6;text-align:center;align-content:center;place-items:center;gap:9px;min-height:345px;display:grid}.chat-empty strong{color:var(--ink);font-size:16px}.chat-empty span{max-width:280px;font-size:12px;line-height:1.45}.chat-messages{gap:14px;display:grid}.chat-message{gap:4px;display:grid}.chat-message.user{justify-items:end}.chat-bubble{color:#40516d;background:#f1f4f9;border-radius:14px 14px 14px 4px;max-width:min(88%,590px);padding:11px 13px;font-size:13px;line-height:1.55}.chat-message.user .chat-bubble{color:#fff;background:var(--blue);border-radius:14px 14px 4px}.chat-bubble p{margin:0}.chat-bubble h2,.chat-bubble h3{color:inherit;margin:4px 0;font-size:14px}.chat-bubble ul{margin:5px 0;padding-left:18px}.chat-bubble small{color:#9aa6b8}.chat-message>small{display:none}.message-controls{min-width:0;color:var(--muted);flex-wrap:wrap;align-items:center;gap:3px 10px;font-size:10px;display:flex}.message-controls button{min-height:28px;color:var(--muted);background:0 0;border:0;border-radius:6px;align-items:center;gap:5px;padding:3px 4px;font-size:10px;display:inline-flex}.message-controls button:hover{color:var(--blue-dark);background:var(--soft-blue)}.message-output-tokens{overflow-wrap:anywhere}.message-copy-error,.chat-title-error{color:#c76b45}.assistant-chat-shell .chat-message.assistant .message-controls{grid-column:2}.session-rename{width:30px;height:34px;color:var(--muted);background:0 0;border:0;border-radius:9px;flex:none;justify-content:center;align-items:center;padding:0;display:inline-flex}.session-rename:hover{color:var(--blue-dark);background:var(--soft-blue)}.chat-title-editor{width:min(100%,420px);max-height:calc(100dvh - 40px);position:relative;top:auto;bottom:auto;left:auto;right:auto}.chat-title-editor .form-grid{grid-template-columns:minmax(0,1fr)}.chat-title-editor .form-grid small{color:var(--muted)}.chat-title-editor .modal-foot{justify-content:flex-end;align-items:center;gap:10px;display:flex}.chat-title-editor .btn-secondary{color:var(--ink);background:var(--surface);border:1px solid var(--line);box-shadow:none}.chat-title-error{margin:14px 0 0;font-size:12px}.topic-notes-entry{flex-wrap:wrap;gap:10px;margin:10px 0 18px;display:flex}.topic-notes-entry .topic-final-test-entry{color:#7044ec;background:#f3edff;border-color:#8055ed;flex:1;min-width:200px}.topic-notes-entry .btn{color:var(--blue-dark);border:1px solid var(--line);background:var(--surface)}.topic-notes-backdrop{left:0;right:0;top:var(--notes-visible-top,0px);height:min(var(--tg-viewport-stable-height,100dvh),var(--notes-visible-height,100dvh));overscroll-behavior:none;background:var(--tg-bg);z-index:50;padding:0;bottom:auto;overflow:hidden}.modal.topic-notes-dialog{width:100%;height:100%;min-height:0;max-height:none;color:var(--ink);background:var(--tg-bg);box-shadow:none;animation:hv-fade-in var(--motion-enter) var(--motion-ease);border:0;border-radius:0;flex-direction:column;margin:0;padding:0;display:flex;position:relative;top:auto;bottom:auto;left:auto;right:auto;overflow:hidden;transform:none}.topic-notes-header{padding:max(12px,var(--tg-chat-header-top),env(safe-area-inset-top)) max(16px,var(--tg-content-safe-left),var(--tg-content-safe-right),calc((100vw - 960px) / 2)) 14px;border-bottom:1px solid 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