:root{box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);
--bg:#F7F8FC;--card:#FFFFFF;--ink:#171A2B;--ink2:#667085;--line:#E7E9F0;--pri:#4F46E5;--pri2:#7C3AED;--sky:#38BDF8;--ok:#22C55E;--warn:#F59E0B;--err:#EF4444;
--priInk:#4F46E5;--soft:#EEF0FB;--soft2:#E3E6F8;--okBg:#E8F8EE;--warnBg:#FEF4E1;--errBg:#FDECEC;--cInd:#4F46E5;--cPur:#7C3AED;--cSky:#0284C7;
--sh:0 1px 2px rgba(23,26,43,.04),0 6px 20px rgba(23,26,43,.05);--shPop:0 14px 44px rgba(23,26,43,.18);--r1:22px;--r2:16px;--r3:12px;--read:19px;--side:268px;
--font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;--ar:'Noto Naskh Arabic','Noto Sans Arabic','Geeza Pro','Segoe UI',Tahoma,serif;color-scheme:light}
:root[data-theme="dark"]{--bg:#0F1117;--card:#171A23;--ink:#F5F7FA;--ink2:#A7ADBA;--line:#262A37;--priInk:#A5B4FC;--soft:#1E2133;--soft2:#272B44;--okBg:#12281B;--warnBg:#2C2412;--errBg:#2E1719;--cInd:#A5B4FC;--cPur:#C4B5FD;--cSky:#7DD3FC;--sh:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);--shPop:0 14px 44px rgba(0,0,0,.55);color-scheme:dark}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0F1117;--card:#171A23;--ink:#F5F7FA;--ink2:#A7ADBA;--line:#262A37;--priInk:#A5B4FC;--soft:#1E2133;--soft2:#272B44;--okBg:#12281B;--warnBg:#2C2412;--errBg:#2E1719;--cInd:#A5B4FC;--cPur:#C4B5FD;--cSky:#7DD3FC;--sh:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);--shPop:0 14px 44px rgba(0,0,0,.55);color-scheme:dark}}
html{scroll-padding-top:env(safe-area-inset-top,0px);height:100%;-webkit-text-size-adjust:100%}
html[data-ts="s"]{--read:17px}html[data-ts="l"]{--read:22px}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.55 var(--font);height:100%;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.015em;font-weight:650}
h1{font-size:clamp(26px,4vw,34px);font-weight:700}h2{font-size:20px}h3{font-size:16.5px}
p{margin:0}a{color:var(--priInk);text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--pri2);outline-offset:2px;border-radius:8px}
.ic{flex:none;display:block}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.muted{color:var(--ink2)}.small{font-size:13px}.tiny{font-size:12px}.b{font-weight:600}
.ar{font-family:var(--ar);direction:rtl;text-align:right;line-height:1.7}
/* layout */
.app{min-height:100%}
.side{display:none}
.main{padding:20px 16px 110px;max-width:1120px;margin:0 auto}
.fade{animation:fade .22s ease both}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@media(min-width:960px){
.side{display:flex;flex-direction:column;position:fixed;left:0;top:0;bottom:0;width:var(--side);padding:calc(24px + env(safe-area-inset-top,0px)) 16px calc(20px + env(safe-area-inset-bottom,0px));border-right:1px solid var(--line);background:var(--card);overflow-y:auto}
.main{margin-left:var(--side);max-width:none;padding:40px 48px 64px}
.main>*{max-width:1080px;margin-left:auto;margin-right:auto}
.bnav{display:none!important}}
.brand{display:flex;align-items:center;gap:12px;padding:0 8px 22px;font-weight:700;font-size:18px;letter-spacing:-.02em}
.brand .logo{width:38px;height:38px;border-radius:12px;background:linear-gradient(140deg,var(--pri),var(--pri2));display:grid;place-items:center;color:#fff}
.nav{display:flex;flex-direction:column;gap:2px}
.nav a{display:flex;align-items:center;gap:12px;padding:7px 10px;border-radius:14px;color:var(--ink);font-weight:500;font-size:15px;transition:background .15s}
.nav a:hover{background:var(--soft)}
.nav a[aria-current="page"]{background:var(--soft);color:var(--priInk);font-weight:600}
.side .foot{margin-top:auto;padding-top:16px}
/* tiles */
.tile{width:var(--sz,36px);height:var(--sz,36px);border-radius:calc(var(--sz,36px)*.3);display:grid;place-items:center;background:var(--tb);color:var(--tc);flex:none}
.t-ind{--tb:rgba(79,70,229,.10);--tc:var(--cInd)}.t-pur{--tb:rgba(124,58,237,.11);--tc:var(--cPur)}.t-sky{--tb:rgba(56,189,248,.16);--tc:var(--cSky)}.t-gray{--tb:rgba(102,112,133,.13);--tc:var(--ink2)}
/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r1);box-shadow:var(--sh);padding:20px}
.card.flat{box-shadow:none}.card.tight{padding:14px 16px;border-radius:var(--r2)}
.card.click{transition:transform .15s,box-shadow .15s,border-color .15s;cursor:pointer}
.card.click:hover{transform:translateY(-2px);border-color:var(--soft2)}
.card.click:active{transform:scale(.99)}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr))}
.g3{grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(min(100%,150px),1fr))}
.row{display:flex;align-items:center;gap:12px}.wrap{flex-wrap:wrap}.sp{justify-content:space-between}.col{display:flex;flex-direction:column;gap:12px}
.mt{margin-top:24px}.mt2{margin-top:12px}.mb{margin-bottom:20px}
.pagehead{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.pagehead p{color:var(--ink2);margin-top:6px}
.sect{display:flex;align-items:center;justify-content:space-between;margin:28px 0 12px}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border-radius:var(--r3);border:1px solid transparent;font-weight:600;font-size:15px;background:var(--pri);color:#fff;transition:transform .12s,background .15s,opacity .15s;text-decoration:none;white-space:nowrap}
.btn:hover{background:#4338CA}.btn:active{transform:scale(.97)}
.btn.soft{background:var(--soft);color:var(--priInk)}.btn.soft:hover{background:var(--soft2)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--line)}.btn.ghost:hover{background:var(--soft)}
.btn.danger{background:var(--errBg);color:var(--err)}
.btn.sm{min-height:36px;padding:0 12px;font-size:14px;border-radius:10px}
.btn.icon{padding:0;width:44px}.btn.sm.icon{width:36px}
.btn[disabled]{opacity:.5;pointer-events:none}
.btn.white{background:#fff;color:#4338CA}.btn.white:hover{background:#F1F2FF}
/* badges */
.chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;background:var(--soft);color:var(--ink2);font-size:12.5px;font-weight:550;white-space:nowrap}
.chip.pri{background:var(--soft2);color:var(--priInk)}.chip.ok{background:var(--okBg);color:#15803D}.chip.warn{background:var(--warnBg);color:#B45309}.chip.err{background:var(--errBg);color:#B91C1C}
:root[data-theme="dark"] .chip.ok{color:#4ADE80}:root[data-theme="dark"] .chip.warn{color:#FBBF24}:root[data-theme="dark"] .chip.err{color:#F87171}
.lvl{display:inline-flex;align-items:center;padding:3px 10px;border-radius:8px;background:var(--soft2);color:var(--priInk);font-weight:700;font-size:12.5px;letter-spacing:.01em}
.filters{display:flex;gap:8px;overflow-x:auto;padding:2px 2px 8px;margin:0 -2px;scrollbar-width:none}.filters::-webkit-scrollbar{display:none}
.fbtn{flex:none;min-height:38px;padding:0 14px;border-radius:999px;border:1px solid var(--line);background:var(--card);font-size:14px;font-weight:550;color:var(--ink2)}
.fbtn[aria-pressed="true"]{background:var(--pri);color:#fff;border-color:var(--pri)}
/* progress */
.bar{height:8px;background:var(--soft2);border-radius:99px;overflow:hidden}.bar>i{display:block;height:100%;background:linear-gradient(90deg,var(--pri),var(--pri2));border-radius:99px;width:0;transition:width .8s cubic-bezier(.2,.8,.2,1)}
.bar.sky>i{background:var(--sky)}.bar.ok>i{background:var(--ok)}.bar.warn>i{background:var(--warn)}
.ring{position:relative;display:grid;place-items:center}.ring svg{transform:rotate(-90deg)}.ring .rc{stroke:var(--pri);transition:stroke-dashoffset .9s cubic-bezier(.2,.8,.2,1)}.ring .rt{stroke:var(--soft2)}
.ring .lab{position:absolute;text-align:center;line-height:1.15}
.stat{display:flex;flex-direction:column;gap:10px;padding:16px}
.stat .n{font-size:26px;font-weight:700;letter-spacing:-.02em;line-height:1}
/* hero */
.hero{background:linear-gradient(135deg,#4338CA 0%,#5B4FE6 55%,#7C3AED 100%);color:#fff;border-radius:26px;padding:26px;display:grid;gap:22px;grid-template-columns:1fr;position:relative;overflow:hidden;border:0}
.hero .bar{background:rgba(255,255,255,.22)}.hero .bar>i{background:#fff}
.hero .eyebrow{font-size:13px;opacity:.8;font-weight:550;letter-spacing:.02em}
.hero .big{font-size:clamp(34px,6vw,46px);font-weight:750;letter-spacing:-.03em;line-height:1.05;margin:6px 0 14px}
.hero .goal{background:rgba(255,255,255,.12);border-radius:18px;padding:16px;display:flex;align-items:center;gap:16px}
.hero .ring .rc{stroke:#fff}.hero .ring .rt{stroke:rgba(255,255,255,.25)}
@media(min-width:760px){.hero{grid-template-columns:1.4fr 1fr;align-items:center;padding:32px}}
/* lists */
.li{display:flex;align-items:center;gap:14px;padding:12px 4px;border-bottom:1px solid var(--line)}.li:last-child{border:0}
.li .grow{flex:1;min-width:0}
.check{width:24px;height:24px;border-radius:8px;border:1.5px solid var(--line);display:grid;place-items:center;color:#fff;flex:none}
.check.on{background:var(--ok);border-color:var(--ok)}
/* reading cards */
.rcard{display:flex;flex-direction:column;gap:12px;height:100%}
.rcard h3{font-size:18px}
.meta{display:flex;flex-wrap:wrap;gap:6px 8px}
.reader-wrap{max-width:720px;margin:0 auto}
.reader{padding:6px 2px}
.reader p{font-size:var(--read);line-height:1.9;margin:0 0 1.15em;letter-spacing:.003em}
.reader ::selection{background:rgba(124,58,237,.28)}
.vw{border-bottom:2px dotted var(--pri2);cursor:pointer;border-radius:2px;transition:background .15s}.vw:hover{background:var(--soft)}
.vw.rev{border-bottom-color:var(--sky)}
.vrow{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.vrow:last-child{border:0}
.hint{display:flex;gap:10px;align-items:flex-start;background:var(--soft);color:var(--ink);border-radius:14px;padding:12px 14px;font-size:14px}
.hint .ic{color:var(--priInk);margin-top:2px}
/* popup */
.tpop{position:absolute;z-index:80;width:min(380px,calc(100vw - 24px));background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shPop);padding:14px;animation:pop .16s ease both}
@keyframes pop{from{opacity:0;transform:translateY(6px) scale(.98)}to{opacity:1;transform:none}}
.tpop .sel{font-weight:650;font-size:15px;max-height:3.2em;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;flex:1;min-width:0}
.tpop .acts{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}
.tpop .res{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}
.tpop .tr{font-size:22px;line-height:1.6;font-weight:600}
.note{border-radius:12px;padding:10px 12px;font-size:13.5px}.note.warn{background:var(--warnBg)}.note.info{background:var(--soft)}
@media(max-width:700px){.tpop{position:fixed;left:0;right:0;bottom:0;width:100%;border-radius:24px 24px 0 0;padding:16px 16px calc(16px + env(safe-area-inset-bottom,0px));max-height:70vh;overflow:auto;animation:sheetup .22s ease both}}
@keyframes sheetup{from{transform:translateY(100%)}to{transform:none}}
.dots{display:inline-flex;gap:3px}.dots i{width:6px;height:6px;border-radius:50%;background:var(--soft2)}.dots i.on{background:var(--pri2)}
.spin{width:16px;height:16px;border-radius:50%;border:2px solid var(--soft2);border-top-color:var(--pri);animation:sp .7s linear infinite;display:inline-block}
@keyframes sp{to{transform:rotate(360deg)}}
.think{display:inline-flex;align-items:center;gap:8px;color:var(--ink2);font-size:14px}
/* vocab card */
.vcard{display:flex;flex-direction:column;gap:8px}
.vcard .w{font-size:21px;font-weight:700;letter-spacing:-.01em}
.vcard .ar{font-size:20px}
.saved{animation:pulse .5s ease}
@keyframes pulse{0%{transform:scale(1)}40%{transform:scale(1.04);background:var(--okBg)}100%{transform:scale(1)}}
input[type=text],input[type=email],input[type=password],textarea,select{width:100%;background:var(--card);border:1px solid var(--line);border-radius:var(--r3);padding:12px 14px;font-size:16px;outline:none;transition:border-color .15s,box-shadow .15s}
input[type=text]:focus,input[type=email]:focus,input[type=password]:focus,textarea:focus,select:focus{border-color:var(--pri);box-shadow:0 0 0 3px rgba(79,70,229,.14)}
textarea{resize:vertical;min-height:140px;line-height:1.6}
/* exercises */
.ex{max-width:640px;margin:0 auto}
.ex .q{font-size:22px;font-weight:650;letter-spacing:-.01em;line-height:1.35;margin:10px 0 18px}
.opts{display:grid;gap:10px}
.opt{display:flex;align-items:center;gap:12px;text-align:left;width:100%;padding:14px 16px;min-height:52px;background:var(--card);border:1.5px solid var(--line);border-radius:var(--r2);font-size:16.5px;transition:border-color .15s,background .15s,transform .12s}
.opt:hover{border-color:var(--pri)}.opt:active{transform:scale(.99)}
.opt .k{width:26px;height:26px;border-radius:8px;background:var(--soft);display:grid;place-items:center;font-size:12.5px;font-weight:700;color:var(--ink2);flex:none}
.opt.ok{border-color:var(--ok);background:var(--okBg)}.opt.bad{border-color:var(--err);background:var(--errBg);animation:shake .3s}
.opt.pick{border-color:var(--pri);background:var(--soft)}
.opt[disabled]{cursor:default}
@keyframes shake{25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
.fb{border-radius:14px;padding:14px 16px;margin-top:16px;animation:fade .2s ease both}.fb.ok{background:var(--okBg)}.fb.bad{background:var(--errBg)}
.mline{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.mline .opt{justify-content:center;min-height:48px;padding:10px}
.ans-ar{font-family:var(--ar);direction:rtl;font-size:20px;text-align:center;justify-content:center}
/* chat */
.chat{display:flex;flex-direction:column;gap:14px;padding:4px 0 16px}
.msg{max-width:min(640px,88%);padding:12px 16px;border-radius:20px;line-height:1.6;font-size:16px;white-space:pre-wrap;word-wrap:break-word;animation:fade .2s ease both}
.msg.me{align-self:flex-end;background:var(--pri);color:#fff;border-bottom-right-radius:8px}
.msg.ai{align-self:flex-start;background:var(--card);border:1px solid var(--line);border-bottom-left-radius:8px}
.msg .cx{display:block;padding:6px 10px;border-radius:10px;margin:4px 0;font-size:15px}.msg .cx.bad{background:var(--errBg)}.msg .cx.good{background:var(--okBg)}
.composer{position:sticky;bottom:calc(76px + env(safe-area-inset-bottom,0px));background:var(--bg);padding:10px 0 4px;display:flex;gap:10px;align-items:flex-end;z-index:5}
.composer textarea{min-height:48px;max-height:140px;height:48px;padding:12px 14px;border-radius:16px}
@media(min-width:960px){.composer{bottom:0;padding-bottom:16px}}
.sug{display:flex;gap:8px;flex-wrap:wrap}
/* bottom nav */
.bnav{position:fixed;left:0;right:0;bottom:0;z-index:40;display:flex;justify-content:space-around;padding:8px 6px calc(8px + env(safe-area-inset-bottom,0px));background:color-mix(in srgb,var(--card) 92%,transparent);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-top:1px solid var(--line)}
.bnav a,.bnav button{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 2px;min-height:54px;color:var(--ink2);font-size:11px;font-weight:600;background:none;border:0;border-radius:12px}
.bnav [aria-current="page"]{color:var(--priInk)}
.bnav .pill{width:52px;height:30px;border-radius:15px;display:grid;place-items:center;transition:background .2s}
.bnav [aria-current="page"] .pill{background:var(--soft2)}
/* sheet & modal */
.scrim{position:fixed;inset:0;background:rgba(15,17,23,.45);z-index:90;display:flex;align-items:flex-end;justify-content:center;animation:fadein .18s ease both}
@keyframes fadein{from{opacity:0}to{opacity:1}}
.sheet{background:var(--card);width:100%;max-width:560px;border-radius:26px 26px 0 0;padding:20px 18px calc(24px + env(safe-area-inset-bottom,0px));max-height:88vh;overflow:auto;animation:sheetup .24s ease both}
@media(min-width:700px){.scrim{align-items:center}.sheet{border-radius:26px;padding-bottom:24px}}
.moregrid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.icard{display:flex;flex-direction:column;align-items:center;gap:8px;padding:14px 6px;border-radius:18px;background:var(--bg);border:1px solid var(--line);font-size:13px;font-weight:600;color:var(--ink)}
/* toasts */
#toasts{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(92px + env(safe-area-inset-bottom,0px));z-index:120;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;width:calc(100% - 32px)}
@media(min-width:960px){#toasts{bottom:32px}}
.toast{display:flex;align-items:center;gap:10px;background:var(--ink);color:var(--bg);padding:11px 16px;border-radius:14px;font-size:14px;font-weight:550;box-shadow:var(--shPop);animation:tin .2s ease both;max-width:440px}
.toast.warn{background:#92400E;color:#fff}.toast.out{opacity:0;transform:translateY(6px);transition:.35s}
@keyframes tin{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
/* misc */
.seg{display:inline-flex;background:var(--soft);border-radius:12px;padding:3px;gap:2px}
.seg button{border:0;background:transparent;min-height:36px;padding:0 14px;border-radius:9px;font-weight:600;font-size:14px;color:var(--ink2)}
.seg button[aria-pressed="true"]{background:var(--card);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.1)}
.tbl{width:100%;border-collapse:collapse;font-size:15px}.tbl th,.tbl td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}.tbl th{font-size:12.5px;color:var(--ink2);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.tblwrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px}
.empty{text-align:center;padding:36px 20px;color:var(--ink2)}.empty .tile{margin:0 auto 14px}
.sc{display:flex;align-items:center;gap:10px}.sc .bar{flex:1}
.audio{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--soft);border-radius:16px;padding:10px 12px}
.audio .seg{background:transparent}
.line{padding:10px 14px;border-radius:14px;border:1px solid var(--line);display:flex;gap:10px;align-items:flex-start;background:var(--card)}
.line.on{border-color:var(--pri);background:var(--soft)}
.chart{width:100%;height:auto;display:block}.chart text{fill:var(--ink2);font-size:11px;font-family:var(--font)}
.kbd{font-size:12px;border:1px solid var(--line);border-radius:6px;padding:1px 6px;background:var(--bg)}
@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* account + cloud sync */
.flabel{display:block;font-size:13px;font-weight:600;color:var(--ink2);margin:14px 0 6px}
.authmsg{font-size:13.5px;line-height:1.5;min-height:20px;margin-top:10px;color:var(--ink2)}
.authmsg.bad{color:var(--err)}
.authmsg.good{color:#15803D}
:root[data-theme="dark"] .authmsg.good{color:#4ADE80}
.linkbtn{background:none;border:0;color:var(--priInk);font-weight:600;font-size:14px;cursor:pointer;padding:0 4px;min-height:44px}
.linkbtn:hover{text-decoration:underline}
.chipbtn{border:0;cursor:pointer;font-family:inherit}