:root{--bg:#F3F4F8;--surface:#FFFFFF;--surface2:#ECEEF5;--ink:#1B1A33;--muted:#5E5C78;--line:#D9DBE6;--accent:#4B3FCF;--accent-ink:#FFFFFF;--mark:#FFE24A;--markbg:#FFE24A;--good:#0E8F5A;--good-bg:#DDF5EA;--bad:#C92A3B;--bad-bg:#FBE3E6;--grid:rgba(75,63,207,.055);color-scheme:light;
box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#121120;--surface:#1B1A2D;--surface2:#25243B;--ink:#ECEBF8;--muted:#A6A4C2;--line:#323050;--accent:#9A91FF;--accent-ink:#121120;--mark:#F5D33A;--markbg:rgba(245,211,58,.33);--good:#45D69F;--good-bg:#11301F;--bad:#FF7383;--bad-bg:#3A1620;--grid:rgba(154,145,255,.06);color-scheme:dark}}
:root[data-theme="dark"]{--bg:#121120;--surface:#1B1A2D;--surface2:#25243B;--ink:#ECEBF8;--muted:#A6A4C2;--line:#323050;--accent:#9A91FF;--accent-ink:#121120;--mark:#F5D33A;--markbg:rgba(245,211,58,.33);--good:#45D69F;--good-bg:#11301F;--bad:#FF7383;--bad-bg:#3A1620;--grid:rgba(154,145,255,.06);color-scheme:dark}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 70px);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.55 "Atkinson Hyperlegible",system-ui,-apple-system,"Segoe UI",sans-serif;
background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:26px 26px;min-height:100%}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--bg)}
h1,h2,h3,.disp{font-family:"Bricolage Grotesque",system-ui,-apple-system,"Segoe UI",sans-serif;letter-spacing:-.01em;line-height:1.15;margin:0}
h1{font-size:clamp(1.75rem,5vw,2.4rem);font-weight:800}
h2{font-size:1.3rem;font-weight:700}
h3{font-size:1.08rem;font-weight:700}
p{margin:0}
a{color:inherit}
button{font:inherit;color:inherit;cursor:pointer}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:8px}
code{font:500 .88em ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--surface2);padding:.08em .35em;border-radius:5px;overflow-wrap:anywhere}
.mk{background:linear-gradient(transparent 52%,var(--markbg) 52%,var(--markbg) 88%,transparent 88%);padding:0 .12em;box-decoration-break:clone;-webkit-box-decoration-break:clone}
.muted{color:var(--muted)}
.small{font-size:.88rem}
/* top bar */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:var(--bg);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;padding:10px 16px}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;font-family:"Bricolage Grotesque",system-ui,sans-serif;font-weight:800;font-size:1.12rem;margin-right:auto}
.brand i{width:28px;height:28px;border-radius:7px;background:var(--ink);display:grid;place-items:center;position:relative;overflow:hidden}
.brand i::after{content:"";width:14px;height:5px;background:var(--mark);transform:rotate(-8deg);border-radius:2px}
.chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:4px 11px;font-size:.86rem;font-weight:700;white-space:nowrap;text-decoration:none}
.sync{width:8px;height:8px;border-radius:50%;background:var(--line)}
.sync.on{background:var(--good)}
/* layout */
.wrap{max-width:780px;margin:0 auto;padding:20px 16px 110px}
.tabs{position:fixed;bottom:0;left:0;right:0;z-index:25;display:flex;justify-content:space-around;background:var(--surface);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom,0px))}
.tabs a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;text-decoration:none;font-size:.74rem;font-weight:700;color:var(--muted);padding:6px 0;border-radius:10px}
.tabs a svg{width:23px;height:23px}
.tabs a.on{color:var(--ink)}
.tabs a.on svg{color:var(--accent)}
@media (min-width:900px){
 .tabs{top:calc(env(safe-area-inset-top,0px) + 57px);bottom:auto;right:auto;left:0;width:200px;flex-direction:column;justify-content:flex-start;gap:4px;border-top:0;border-right:1px solid var(--line);background:transparent;padding:18px 12px;height:calc(100% - 57px)}
 .tabs a{flex:0;flex-direction:row;gap:12px;font-size:.98rem;padding:10px 12px}
 .tabs a.on{background:var(--surface);box-shadow:inset 3px 0 0 var(--accent)}
 .wrap{padding:32px 24px 60px;margin-left:max(220px,calc(50% - 390px + 100px))}
}
.sec{margin-top:30px}
.sec>h2{margin-bottom:12px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.between{justify-content:space-between}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:12px 18px;font-weight:700;text-decoration:none;background:var(--accent);color:var(--accent-ink);min-height:46px;transition:transform .12s}
.btn:active{transform:scale(.97)}
.btn.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn.soft{background:var(--surface2);color:var(--ink)}
.btn.block{width:100%}
.btn[disabled]{opacity:.55;cursor:default}
.ai{display:none!important}
.has-ai .ai{display:inline-flex!important}
.has-ai p.ai,.has-ai div.ai{display:block!important}
/* hero */
.hero{display:grid;gap:16px}
.lvl{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:18px}
.lvl .name{font-family:"Bricolage Grotesque",sans-serif;font-weight:800;font-size:1.25rem}
.bar{height:14px;border-radius:4px;background:var(--surface2);overflow:hidden;margin:12px 0 6px;position:relative}
.bar b{display:block;height:100%;background:var(--mark);border-radius:3px 6px 4px 3px;transform-origin:left;transition:width .6s ease}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px}
.stat{text-align:left}
.stat b{display:block;font-family:"Bricolage Grotesque",sans-serif;font-size:1.45rem;font-weight:800}
.stat span{font-size:.8rem;color:var(--muted)}
/* continue block */
.cont{border-radius:18px;padding:20px;background:var(--ink);color:var(--bg);display:grid;gap:10px}
.cont .muted{color:color-mix(in srgb,var(--bg) 70%,transparent)}
.cont h2{font-size:1.45rem}
.cont .btn{background:var(--mark);color:#1B1A33}
.cont .btn.ghost{background:transparent;color:var(--bg);border-color:color-mix(in srgb,var(--bg) 35%,transparent)}
/* tiles */
.list{display:grid;gap:10px}
.tile{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px;text-decoration:none;position:relative}
.tile:hover{border-color:var(--muted)}
.emo{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:1.45rem;background:color-mix(in srgb,var(--tc) 16%,var(--surface))}
.tile h3{margin-bottom:2px}
.prog{height:6px;border-radius:3px;background:var(--surface2);overflow:hidden;margin-top:8px}
.prog b{display:block;height:100%;background:var(--tc,var(--accent))}
.num{font-family:"Bricolage Grotesque",sans-serif;font-weight:800;color:var(--muted);width:30px;text-align:center}
.stars{letter-spacing:1px;color:var(--line);font-size:.95rem;white-space:nowrap}
.stars i{font-style:normal}
.stars i.on{color:#E9A800}
:root[data-theme="dark"] .stars i.on{color:var(--mark)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .stars i.on{color:var(--mark)}}
.modes{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:10px}
.mode{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px;text-align:left;display:grid;gap:6px;align-content:start}
.mode .ic{font-size:1.6rem}
.mode.big{grid-column:1/-1;background:var(--surface);border:2px solid var(--ink)}
.mode[disabled]{opacity:.5}
/* chapter */
.crumb{display:inline-flex;gap:6px;align-items:center;font-weight:700;text-decoration:none;color:var(--muted);font-size:.92rem;margin-bottom:14px}
.lead{font-size:1.12rem;margin-top:14px}
.pts{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:12px}
.pts li{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--tc,var(--accent));border-radius:4px 12px 12px 4px;padding:12px 14px}
.key{margin-top:20px;padding:16px 18px;border-radius:14px;background:var(--surface2);display:grid;gap:4px}
.key b.t{font-family:"Bricolage Grotesque",sans-serif}
.actions{display:grid;gap:10px;margin-top:22px}
@media (min-width:560px){.actions{grid-template-columns:1fr 1fr}}
.pager{display:flex;justify-content:space-between;gap:10px;margin-top:26px}
.pager a{flex:1;text-decoration:none;border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:var(--surface);font-size:.9rem}
.pager a:last-child{text-align:right}
.search{width:100%;font:inherit;color:var(--ink);background:var(--surface);border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;min-height:48px}
.search:focus{outline:none;border-color:var(--accent)}
/* quiz */
.qtop{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.x{text-decoration:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--surface);display:grid;place-items:center;font-size:1.2rem;flex:none}
.segs{flex:1;display:flex;gap:3px}
.segs i{flex:1;height:8px;border-radius:2px;background:var(--surface2)}
.segs i.g{background:var(--good)}.segs i.r{background:var(--bad)}.segs i.c{background:var(--ink)}.segs i.d{background:var(--muted)}
.combo{font-weight:800;font-family:"Bricolage Grotesque",sans-serif;min-width:48px;text-align:right}
.combo.hot{color:#E8590C}
.qtxt{font-family:"Bricolage Grotesque",sans-serif;font-weight:700;font-size:clamp(1.25rem,4.2vw,1.6rem);line-height:1.25;margin:6px 0 18px}
.qmeta{font-size:.85rem;color:var(--muted);font-weight:700}
.opts{display:grid;gap:10px}
.opt{display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:center;text-align:left;background:var(--surface);border:2px solid var(--line);border-radius:14px;padding:12px 14px;min-height:58px;transition:border-color .15s,background .15s}
.opt .l{width:34px;height:34px;border-radius:9px;background:var(--surface2);display:grid;place-items:center;font-weight:800;font-family:"Bricolage Grotesque",sans-serif}
.opt:hover:not([disabled]){border-color:var(--muted)}
.opt.good{border-color:var(--good);background:var(--good-bg)}
.opt.good .l{background:var(--good);color:var(--surface)}
.opt.bad{border-color:var(--bad);background:var(--bad-bg)}
.opt.bad .l{background:var(--bad);color:var(--surface)}
.opt.dim{opacity:.55}
.opt.sel{border-color:var(--accent)}
.fb{margin-top:16px;border-radius:14px;padding:16px;display:grid;gap:10px}
.fb.ok{background:var(--good-bg)}.fb.ko{background:var(--bad-bg)}
.fb h3{font-size:1.15rem}
.fb.ok h3{color:var(--good)}.fb.ko h3{color:var(--bad)}
.coach{background:var(--surface);border:1px dashed var(--muted);border-radius:12px;padding:12px 14px;white-space:pre-wrap}
.timer{flex:1;height:10px;border-radius:5px;background:var(--surface2);overflow:hidden}
.timer b{display:block;height:100%;background:var(--mark)}
.stick{position:sticky;bottom:calc(76px + env(safe-area-inset-bottom,0px));margin-top:16px}
@media (min-width:900px){.stick{bottom:16px}}
/* results */
.res{text-align:center;padding:10px 0}
.score{font-family:"Bricolage Grotesque",sans-serif;font-weight:800;font-size:clamp(3.4rem,14vw,5rem);line-height:1;display:inline-block;position:relative;padding:0 .15em}
.score::before{content:"";position:absolute;left:0;bottom:.12em;height:.38em;width:100%;background:var(--markbg);z-index:-1;transform-origin:left;animation:swipe .7s .15s ease-out both;border-radius:3px}
@keyframes swipe{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.res .stars{font-size:2rem;margin:10px 0;display:block}
.review{display:grid;gap:10px;text-align:left;margin-top:16px}
.rv{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px;display:grid;gap:6px}
.rv .y{color:var(--bad)}.rv .k{color:var(--good)}
/* flashcards */
.card{perspective:1200px;height:300px;margin:8px 0 18px;cursor:pointer}
.card .in{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.card.flip .in{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:20px;border:1px solid var(--line);background:var(--surface);display:grid;place-items:center;text-align:center;padding:26px;overflow:auto}
.face.back{transform:rotateY(180deg);background:var(--surface2)}
.face .term{font-family:"Bricolage Grotesque",sans-serif;font-weight:800;font-size:clamp(1.5rem,6vw,2.1rem)}
.face .def{font-size:1.15rem}
.hint{font-size:.85rem;color:var(--muted);margin-top:10px}
/* badges */
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
.bdg{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px;display:grid;gap:4px;text-align:left;align-content:start}
.bdg .ic{font-size:1.6rem}
.bdg.off{opacity:.45;filter:grayscale(1)}
.seg3{display:inline-flex;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface)}
.seg3 button{border:0;background:transparent;padding:10px 14px;font-weight:700}
.seg3 button.on{background:var(--ink);color:var(--bg)}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(88px + env(safe-area-inset-bottom,0px));z-index:40;background:var(--ink);color:var(--bg);padding:12px 18px;border-radius:14px;font-weight:700;box-shadow:0 6px 24px rgba(0,0,0,.25);width:max-content;max-width:calc(100% - 32px);text-align:center;animation:pop .25s ease-out}
@keyframes pop{from{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%,0)}}
.empty{border:1.5px dashed var(--line);border-radius:14px;padding:22px;text-align:center;color:var(--muted)}
.tag{display:inline-block;font-size:.78rem;font-weight:700;padding:2px 8px;border-radius:6px;background:color-mix(in srgb,var(--tc,var(--accent)) 16%,var(--surface));}
@media (prefers-reduced-motion:reduce){*,*::before{animation:none!important;transition:none!important}}
/* ---- comptes & classement ---- */
.seg3 a{display:inline-block;padding:10px 14px;font-weight:700;text-decoration:none}
.seg3 a.on{background:var(--ink);color:var(--bg)}
.form{display:grid;gap:14px;max-width:460px}
.form label{display:grid;gap:6px;font-weight:700}
.form input:not([type=checkbox]){font:inherit;font-weight:400;color:var(--ink);background:var(--surface);border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;min-height:48px;width:100%}
.form input:focus{outline:none;border-color:var(--accent)}
.form fieldset{border:0;padding:0;margin:0;display:grid;gap:8px}
.form legend{font-weight:700;margin-bottom:8px}
.form .check{display:flex;gap:10px;align-items:center;font-weight:400}
.form .check input{width:20px;height:20px;accent-color:var(--accent)}
.err{color:var(--bad);font-weight:700;min-height:0}
.err:empty{display:none}
.avs{display:flex;flex-wrap:wrap;gap:8px;max-width:460px}
.av{width:48px;height:48px;border-radius:12px;border:2px solid var(--line);background:var(--surface);font-size:1.5rem;display:grid;place-items:center}
.av.on{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,var(--surface))}
.acct{display:flex;gap:16px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:16px}
.bigav{width:64px;height:64px;border-radius:18px;background:var(--surface2);display:grid;place-items:center;font-size:2.2rem;flex:none}
.btn.danger{color:var(--bad);border-color:color-mix(in srgb,var(--bad) 40%,var(--line))}
.board{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.lb{display:grid;grid-template-columns:34px 42px 1fr auto;gap:10px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:10px 12px}
.lb.me{border:2px solid var(--accent)}
.rk{font-family:"Bricolage Grotesque",sans-serif;font-weight:800;text-align:center;font-size:1.1rem}
.lav{width:42px;height:42px;border-radius:12px;background:var(--surface2);display:grid;place-items:center;font-size:1.4rem}
.lb b{overflow-wrap:anywhere}
.lbx{font-family:"Bricolage Grotesque",sans-serif;font-weight:800;font-size:1.15rem;white-space:nowrap}
.lbx small{font-size:.7em;color:var(--muted)}
.tabs a.desk{display:none}
@media (min-width:900px){.tabs a.desk{display:flex}}
#mechip{max-width:150px;overflow:hidden;text-overflow:ellipsis}
@media (max-width:380px){#stchip{display:none}}
.form>*{min-width:0}
.form fieldset{min-width:0}
.brand{white-space:nowrap}
@media (max-width:520px){#lvchip{display:none}.top{gap:8px;padding:10px 12px}}