:root{
  --bg:#F5F0E8; --surface:#FFFDF9; --surface2:#EFE8DD; --ink:#1E1A15; --muted:#6F665B; --line:#E4DACB;
  --accent:#D2541F; --accent-ink:#fff; --accent-soft:#F8E3D6; --accent-text:#C24A17;
  --warm:#F6E2D4; --warm-ink:#B4461A; --cool:#E3E8EF; --cool-ink:#4A5D78; --sage:#E5EADC; --sage-ink:#5B6B45;
  --tour:#C24A17; --tour-shade:rgba(30,26,21,.58); --good:#2F8F5B; --good-soft:#E1F1E7; --bad:#C2412D; --bad-soft:#F8E0DA; --dark:#1E1A15; --dark-ink:#F5F0E8;
  --serif:"Playfair Display",Georgia,"Times New Roman",serif; --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --radius:16px; --shadow:0 1px 2px rgba(30,26,21,.05),0 6px 24px rgba(30,26,21,.06);
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --bg:#0E121C; --surface:#171D2B; --surface2:#20283A; --ink:#E9ECF4; --muted:#949DB3; --line:#2A3347;
  --accent:#7356FF; --accent-text:#A795FF; --accent-ink:#fff; --accent-soft:#272150; --warm:#262040; --warm-ink:#B7A6FF; --cool:#1A2740; --cool-ink:#9CB9EE;
  --sage:#18302B; --sage-ink:#8FD5B6; --tour:#4B1FE0; --tour-shade:rgba(8,10,24,.62); --good:#46D392; --good-soft:#123227; --bad:#FF7E7E; --bad-soft:#3A1C24; --dark:#090C14; --dark-ink:#E9ECF4;
  --shadow:0 1px 0 rgba(255,255,255,.03) inset,0 8px 28px rgba(0,0,0,.35);
  color-scheme:dark;
}}
:root[data-theme=dark]{
  --bg:#0E121C; --surface:#171D2B; --surface2:#20283A; --ink:#E9ECF4; --muted:#949DB3; --line:#2A3347;
  --accent:#7356FF; --accent-text:#A795FF; --accent-ink:#fff; --accent-soft:#272150; --warm:#262040; --warm-ink:#B7A6FF; --cool:#1A2740; --cool-ink:#9CB9EE;
  --sage:#18302B; --sage-ink:#8FD5B6; --tour:#4B1FE0; --tour-shade:rgba(8,10,24,.62); --good:#46D392; --good-soft:#123227; --bad:#FF7E7E; --bad-soft:#3A1C24; --dark:#090C14; --dark-ink:#E9ECF4;
  --shadow:0 1px 0 rgba(255,255,255,.03) inset,0 8px 28px rgba(0,0,0,.35);
  color-scheme:dark;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--sans);-webkit-font-smoothing:antialiased;padding-bottom:calc(84px + env(safe-area-inset-bottom));-webkit-tap-highlight-color:transparent;overscroll-behavior-y:none}
a{color:inherit}
button{font:inherit;color:inherit}
h1,h2,h3{font-family:var(--serif);font-weight:700;line-height:1.2;margin:0}
.wrap{max-width:980px;margin:0 auto;padding:0 max(16px,env(safe-area-inset-right)) 0 max(16px,env(safe-area-inset-left))}
.narrow{max-width:760px}

/* header + navigation */
.top{position:sticky;top:0;z-index:20;padding-top:env(safe-area-inset-top);background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:16px;height:60px}
.brand{font-family:var(--serif);font-weight:700;font-size:20px;text-decoration:none;margin-right:auto;display:flex;align-items:center;gap:8px}
.brand i{width:10px;height:10px;border-radius:50%;background:var(--accent);display:inline-block}
.topnav{display:flex;gap:4px}
.topnav a{text-decoration:none;padding:8px 12px;border-radius:999px;color:var(--muted);font-weight:500;font-size:15px}
.topnav a.on,.topnav a:hover{background:var(--surface2);color:var(--ink)}
.langsw{display:flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.langsw a{text-decoration:none;font-size:12px;font-weight:600;padding:5px 10px;color:var(--muted)}
.langsw a.on{background:var(--ink);color:var(--bg)}
.bottomnav{position:fixed;left:0;right:0;bottom:0;z-index:30;background:var(--surface);border-top:1px solid var(--line);display:none;padding:6px 8px calc(6px + env(safe-area-inset-bottom))}
.bottomnav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;text-decoration:none;font-size:11px;font-weight:500;color:var(--muted);padding:6px 0;border-radius:14px}
.bottomnav a.on{color:var(--accent-text);background:var(--accent-soft)}
.bottomnav svg{width:22px;height:22px}
@media (max-width:760px){.topnav{display:none}.bottomnav{display:flex}}
@media (min-width:761px){body{padding-bottom:0}}

/* generic blocks */
.page{padding-top:28px;padding-bottom:56px}
.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:600}
.lead{color:var(--muted);font-size:17px;margin:10px 0 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:12px 20px;font-weight:600;cursor:pointer;text-decoration:none;background:var(--accent);color:var(--accent-ink)}
.btn.ghost{background:var(--surface2);color:var(--ink)}
.btn.small{padding:8px 14px;font-size:14px}
.btn:disabled{opacity:.5;cursor:default}
.badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.06em;padding:3px 8px;border-radius:6px;background:var(--dark);color:var(--dark-ink)}
.badge.A1{background:#3E7C59}.badge.A2{background:#2F6E8F}.badge.B1{background:#B4461A}.badge.B2{background:#6B3FA0}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}
.chip{border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:7px 14px;font-weight:600;font-size:14px;cursor:pointer;color:var(--muted)}
.chip.on{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.muted{color:var(--muted)}
.hidden{display:none!important}
.bar{height:6px;border-radius:999px;background:var(--surface2);overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);border-radius:999px}
.iconbtn{border:0;background:transparent;cursor:pointer;padding:6px;border-radius:10px;color:var(--muted);display:inline-flex}
.iconbtn:hover{background:var(--surface2);color:var(--ink)}
.iconbtn svg{width:20px;height:20px}
.star.on{color:var(--accent-text)}
.star.on svg{fill:currentColor}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:12px;line-height:1.5;text-align:center;margin-top:56px;padding:16px 0 24px}

/* home */
.hero{padding:40px 0 10px}
.hero h1{font-size:clamp(32px,6vw,52px);max-width:780px}
.hero .actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.dash{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));margin:28px 0}
.dash h3{font-size:19px;margin:6px 0}
.levels .card{text-decoration:none;display:block}
.levels h3{font-size:22px;display:flex;align-items:center;gap:10px}
.levels .card:hover{border-color:var(--accent)}
section.block{margin-top:38px}
section.block>h2{font-size:28px;margin-bottom:6px}
details.faq{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin-top:10px}
details.faq summary{cursor:pointer;font-weight:600}
details.faq p{margin:10px 0 0;color:var(--muted)}

/* topic list */
.topic-card{display:flex;flex-direction:column;gap:8px;text-decoration:none;position:relative}
.topic-card h3{font-size:20px}
.topic-card .sub{font-size:11px;letter-spacing:.12em;color:var(--muted);font-weight:600}
.topic-card .meta{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-top:auto}
.topic-card .done{color:var(--good);font-weight:600}
.topic-card .star{position:absolute;top:10px;right:10px}

/* topic page */
.tabs{display:flex;background:var(--surface2);border-radius:999px;padding:4px;margin:6px 0 22px;position:sticky;top:68px;z-index:10}
.tabs button{flex:1;border:0;background:transparent;border-radius:999px;padding:11px;font-weight:600;font-size:16px;cursor:pointer;color:var(--muted)}
.tabs button.on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}
.sheet{background:var(--surface);border-radius:var(--radius);border-left:4px solid var(--accent);padding:26px 22px;box-shadow:var(--shadow)}
.sheet-head{display:flex;gap:12px;align-items:flex-start}
.sheet-head h1{font-size:clamp(28px,5vw,40px)}
.sheet-head .sub{font-size:12px;letter-spacing:.12em;color:var(--muted);font-weight:600;margin-top:6px}
.sheet-head .star{margin-left:auto}
.summary{display:flex;gap:10px;align-items:flex-start;background:var(--surface2);border-radius:12px;padding:10px 12px;margin:16px 0 6px;font-size:14px}
.lesson-progress{display:flex;align-items:center;gap:10px;margin:12px 0 4px}.lesson-progress .bar{flex:1}.lesson-progress b{font-size:13px;min-width:38px;text-align:right}
.rule{margin-top:30px}
.rule h2{font-size:clamp(21px,3.4vw,26px)}
.rule .hint{color:var(--muted);font-size:14px;margin:4px 0 14px}
.cmp{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.cmp .c{border-radius:14px;padding:14px 16px}
.c.warm{background:var(--warm)}.c.cool{background:var(--cool)}.c.sage{background:var(--sage)}
.c .lbl{font-size:12px;letter-spacing:.1em;text-transform:uppercase;font-weight:700}
.c.warm .lbl{color:var(--warm-ink)}.c.cool .lbl{color:var(--cool-ink)}.c.sage .lbl{color:var(--sage-ink)}
.c .note{font-size:12.5px;color:var(--muted);margin-top:2px}
.ex{margin-top:12px}
.ex .en{display:flex;gap:6px;align-items:flex-start}
.ex .en span{flex:1}
.ex .tr{font-size:13.5px;color:var(--muted)}
.hl{color:var(--accent-text);font-weight:700}
.tbl{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:15px}
.tbl th{background:var(--dark);color:var(--dark-ink);text-align:left;padding:10px 12px;font-size:13px;font-weight:600}
.tbl td{padding:11px 12px;border-top:1px solid var(--line);vertical-align:top}
.tbl td:first-child{font-weight:600;width:38%}
.tbl .tr{font-size:13px;color:var(--muted)}
.scale{display:flex;border-radius:12px;overflow:hidden}
.scale div{flex:1;padding:10px 6px;text-align:center;font-size:13px;font-weight:700;line-height:1.3}
.scale small{display:block;font-weight:400;font-size:11.5px;opacity:.85}
.scale .s0{background:#B4461A;color:#fff}.scale .s1{background:#D2541F;color:#fff}.scale .s2{background:var(--surface2)}.scale .s3{background:var(--cool)}.scale .s4{background:#4A5D78;color:#fff}
.scale-ex{margin-top:10px;font-size:15px}
.tip{background:var(--accent-soft);border-radius:12px;padding:12px 14px;margin-top:24px;font-size:15px}
.tip b{color:var(--accent-text)}
.note-line{font-size:13px;color:var(--muted);margin-top:8px}
.pager{display:flex;justify-content:space-between;gap:10px;margin-top:22px;flex-wrap:wrap}
.pager a{text-decoration:none;color:var(--muted);font-size:14px}
@media (max-width:560px){.scale div{padding:9px 3px;font-size:11.5px}.scale small{font-size:10.5px}.tbl td:first-child{width:auto}}

/* exercises */
.xs{display:flex;flex-direction:column;gap:12px}
.x{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px}
.x .ask{font-size:12.5px;color:var(--muted);font-weight:600;letter-spacing:.02em}
.x .q{font-size:18px;margin:4px 0 12px}
.x .q u{text-decoration:none;border-bottom:2px solid var(--accent);padding:0 18px}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opt{border:1.5px solid var(--line);background:var(--surface);border-radius:12px;padding:10px 16px;cursor:pointer;font-weight:500;text-align:left}
.opt:hover{border-color:var(--accent)}
.opt.right{border-color:var(--good);background:var(--good-soft)}
.opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.typed{display:flex;gap:8px;flex-wrap:wrap}
.typed input{flex:1;min-width:160px;border:1.5px solid var(--line);border-radius:12px;padding:10px 12px;font:inherit;background:var(--surface);color:var(--ink)}
.typed input.right{border-color:var(--good);background:var(--good-soft)}
.typed input.wrong{border-color:var(--bad);background:var(--bad-soft)}
.fb{font-size:14px;margin-top:8px;font-weight:600}
.fb.right{color:var(--good)}.fb.wrong{color:var(--bad)}
.score{text-align:center;padding:24px}
.score b{font-family:var(--serif);font-size:44px;display:block}

/* review */
.deck{display:flex;flex-direction:column;gap:6px}
.deck h3{font-size:18px}
.deck .meta{font-size:13px;color:var(--muted)}
.flash{max-width:560px;margin:10px auto 0}
.flash .card{min-height:260px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;gap:14px;padding:30px 20px}
.flash .front{font-family:var(--serif);font-size:clamp(24px,5vw,32px);line-height:1.25}
.flash .back{font-size:18px;color:var(--muted)}
.flash .grades{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px}
.flash .grades .btn{padding:12px 6px}
.g-again{background:var(--bad-soft)!important;color:var(--bad)!important}.g-hard{background:var(--surface2)!important;color:var(--ink)!important}.g-good{background:var(--good-soft)!important;color:var(--good)!important}
.flash .top-row{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted);margin-bottom:8px}

/* plan */
.days{display:flex;flex-direction:column;gap:10px}
.day{display:flex;gap:14px;align-items:flex-start}
.day .n{flex:0 0 42px;height:42px;border-radius:12px;background:var(--surface2);display:flex;align-items:center;justify-content:center;font-weight:700}
.day.today .n{background:var(--accent);color:var(--accent-ink)}
.day.done .n{background:var(--good-soft);color:var(--good)}
.day .body{flex:1}
.day h3{font-size:17px;font-family:var(--sans);font-weight:600}
.tasks{list-style:none;padding:0;margin:6px 0 0;display:flex;flex-direction:column;gap:6px}
.tasks label{display:flex;gap:8px;align-items:center;font-size:14.5px;cursor:pointer}
.tasks input{width:18px;height:18px;accent-color:var(--accent)}

/* forms + profile */
.form{display:flex;flex-direction:column;gap:12px;max-width:380px}
.form label{font-size:13px;font-weight:600;color:var(--muted)}
.form input{border:1.5px solid var(--line);border-radius:12px;padding:11px 12px;font:inherit;background:var(--surface);color:var(--ink);width:100%}
.err{color:var(--bad);font-size:14px;min-height:20px}
.stats{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));margin:18px 0}
.stats .card b{font-family:var(--serif);font-size:32px;display:block}
.stats .card span{font-size:13px;color:var(--muted)}

/* videos */
.videos{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.vid{display:flex;flex-direction:column;gap:4px}
.vid .thumb{position:relative;border:0;padding:0;border-radius:12px;overflow:hidden;cursor:pointer;background:#000;aspect-ratio:16/9;display:block;width:100%}
.vid .thumb img{width:100%;height:100%;object-fit:cover;display:block;opacity:.92}
.vid .play{position:absolute;inset:0;margin:auto;width:58px;height:40px;border-radius:10px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px}
.vid iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:12px;display:block}
.vmeta{display:flex;gap:8px;font-size:12px;margin-top:4px}
.vlang{background:var(--surface2);border-radius:6px;padding:1px 7px;font-weight:600;color:var(--muted)}
.vseen{color:var(--good);font-weight:600}
.vtitle{font-size:14.5px;line-height:1.35}
.vchan{font-size:13px}
.vwhy{font-size:13px;color:var(--muted);font-style:italic}

/* gamification */
.hdr-stat{display:flex;align-items:center;gap:6px;text-decoration:none;border:1px solid var(--line);border-radius:999px;padding:3px 8px 3px 10px;font-size:14px}
.hdr-stat .flame b{margin-left:2px}
.hdr-stat svg{width:20px;height:20px}
.ring{transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:4}
.ring-bg{stroke:var(--surface2)}
.ring-fg{stroke:var(--accent);stroke-linecap:round;transition:stroke-dasharray .4s}
.toast{position:fixed;left:50%;bottom:96px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:9px 16px;border-radius:999px;font-weight:700;font-size:14px;z-index:60;box-shadow:var(--shadow);animation:pop .25s ease-out}
.toast.big{background:var(--accent);color:#fff;font-size:16px;padding:12px 20px}
@keyframes pop{from{transform:translate(-50%,10px);opacity:0}to{transform:translate(-50%,0);opacity:1}}
.path{display:flex;flex-direction:column;align-items:center;gap:6px;padding:16px 0 4px}
.node{display:flex;flex-direction:column;align-items:center;gap:6px;text-decoration:none;width:150px;text-align:center}
.node .dot{width:64px;height:64px;border-radius:50%;background:var(--surface2);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:20px;border:4px solid var(--line);color:var(--muted)}
.node.done .dot{background:var(--good);border-color:var(--good-soft);color:#fff}
.node.current .dot{background:var(--accent);border-color:var(--accent-soft);color:#fff;box-shadow:0 0 0 6px var(--accent-soft);animation:pulse 2s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 12px transparent}}
.node span{font-size:13px;font-weight:600;line-height:1.25}
.node .go{font-size:12px;color:var(--accent-text)}
.node:nth-child(4n+2){transform:translateX(52px)}.node:nth-child(4n+4){transform:translateX(-52px)}
.ach{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px;margin-top:10px}
.ach div{border:1px solid var(--line);border-radius:12px;padding:10px;text-align:center;opacity:.45}
.ach div.on{opacity:1;border-color:var(--accent)}
.ach i{font-style:normal;font-size:26px;display:block}
.ach b{display:block;font-size:13px}.ach small{font-size:11.5px;color:var(--muted)}

/* words */
.search{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:11px 14px;font:inherit;background:var(--surface);color:var(--ink);margin:16px 0 4px}
.wlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:8px;margin-top:12px}
.w{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.w-en{display:flex;align-items:center;justify-content:space-between;gap:6px}
.w-en b{font-size:16px}
.w-tr{font-size:14.5px}
.w-ex{font-size:13px;color:var(--muted);font-style:italic;margin-top:2px}
.mine-row{display:flex;align-items:center;gap:10px;padding:8px 0;border-top:1px solid var(--line)}
.mine-row:first-child{border-top:0}
.mine-row .t{flex:1}
.mine-row small{display:block;color:var(--muted);font-size:12.5px}

/* reading */
.rtext{font-size:18px;line-height:1.8;margin:12px 0}
.rs{border-radius:6px;padding:1px 2px;transition:background .2s}
.rs.g{background:var(--good-soft)}.rs.y{background:#F7EBC8}.rs.r{background:var(--bad-soft)}
.rx textarea,.notes{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:10px 12px;font:inherit;background:var(--surface);color:var(--ink);resize:vertical}
.rx.g textarea{border-color:var(--good)}.rx.y textarea{border-color:#C9A227}.rx.r textarea{border-color:var(--bad)}
.rx .q{font-size:16px;margin:2px 0 8px}
.ref{font-size:14px;margin-top:8px;background:var(--surface2);border-radius:10px;padding:8px 10px}
.fb.part{color:#9A7A10}

/* add-to-vocabulary */
.addword{position:absolute;z-index:70;background:var(--ink);color:var(--bg);border:0;border-radius:999px;padding:7px 12px;font-weight:700;font-size:13px;cursor:pointer;box-shadow:var(--shadow)}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:80;display:flex;align-items:flex-end;justify-content:center;padding:16px}
.modal .card{width:100%;max-width:420px;margin-bottom:max(16px,env(safe-area-inset-bottom))}
.modal input{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:10px 12px;font:inherit;background:var(--surface);color:var(--ink);margin:6px 0 10px}
@media (min-width:761px){.modal{align-items:center}}
@media (max-width:420px){.hdr-stat .ring{display:none}}

.btn svg{width:18px;height:18px;flex:none}
.badge{font-family:var(--sans)}

/* registration + locked levels */
.select{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:11px 12px;font:inherit;background:var(--surface);color:var(--ink)}
.form small{display:block;margin-top:4px;font-size:12px}
.lock{text-align:center;padding:30px 18px;background:var(--surface2);border-radius:14px;margin-top:18px}
.lock .big{font-size:40px;display:block}
.lock h2{font-size:24px;margin:8px 0}
.lock p{color:var(--muted);max-width:460px;margin:0 auto 16px}
.topic-card.locked{opacity:.55}
.topic-card .lockmark{color:var(--muted);font-weight:600}

/* guided tour: spotlight + bubble; on phones the bubble sits above the home indicator, full width */
.tour-hole{position:fixed;z-index:90;border-radius:14px;box-shadow:0 0 0 9999px var(--tour-shade,rgba(8,10,24,.62));transition:all .25s ease;pointer-events:none}
.tour-block{position:fixed;inset:0;z-index:89}
.tour-tip{position:fixed;z-index:91;width:min(340px,calc(100vw - 32px));background:var(--tour);color:#fff;border-radius:14px;padding:16px 16px 12px;box-shadow:0 12px 40px rgba(0,0,0,.35);font-size:16px;line-height:1.45;transition:top .25s ease,left .25s ease}
.tour-tip p{margin:0 0 12px}
.tour-tip .row{display:flex;align-items:center;gap:10px}
.tour-tip .n{opacity:.7;font-size:14px;margin-right:auto}
.tour-tip .skip{background:none;border:0;color:#fff;opacity:.75;font:inherit;font-size:14px;padding:10px 6px;cursor:pointer}
.tour-tip .next{background:#fff;color:var(--tour);border:0;border-radius:10px;font:inherit;font-weight:600;padding:10px 18px;min-height:44px;cursor:pointer}
.tour-tip .next:focus{outline:none}.tour-tip .next:focus-visible{outline:2px solid #fff;outline-offset:3px}
.tour-tip .arrow{position:absolute;width:14px;height:14px;background:var(--tour);transform:rotate(45deg)}
@media (max-width:560px){.tour-tip{left:16px!important;right:16px;width:auto;top:auto!important;bottom:calc(16px + env(safe-area-inset-bottom))}.tour-tip .arrow{display:none}
  .tour-tip.low{bottom:calc(84px + env(safe-area-inset-bottom))}.tour-tip.high{bottom:auto;top:calc(16px + env(safe-area-inset-top))!important}}

/* phones (iPhone 17: 402×874, 17 Pro Max: 440×956) */
input,textarea,select{font-size:max(16px,1em)}
button,a.btn,.opt,.chip{touch-action:manipulation}
.bottomnav a{min-height:48px}
@media (hover:none){.opt:hover,.levels .card:hover{border-color:var(--line)}.topnav a:hover{background:none}}
@media (max-width:760px){.modal{padding-bottom:env(safe-area-inset-bottom)}.toast{bottom:calc(92px + env(safe-area-inset-bottom))}}
.theme-chips{display:flex;gap:8px;flex-wrap:wrap}
.form.card{width:100%;max-width:480px}

/* owner statistics */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.kpis .card b{display:block;font-size:30px;font-family:var(--serif)}
.funnel div{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 12px;margin:10px 0}
.funnel .bar{grid-column:1/-1;height:10px}
.chart{display:flex;align-items:flex-end;gap:3px;height:140px;margin-top:10px}
.chart .d{flex:1;display:flex;align-items:flex-end;gap:1px;height:100%;min-width:0}
.chart i{flex:1;border-radius:3px 3px 0 0;min-height:2px}
.chart i.v{background:var(--line)}.chart i.r{background:var(--accent)}.chart i.a{background:var(--good)}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin-top:8px}
.legend span::before{content:"";display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px;background:var(--c)}
.tscroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin-top:10px}
.stbl{border-collapse:collapse;width:100%;font-size:14px;white-space:nowrap}
.stbl th,.stbl td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left}
.stbl th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.04em}

/* contacts reminder + account editor */
.notice{background:var(--accent-soft);border-bottom:1px solid var(--line)}
.notice .wrap{display:flex;align-items:center;gap:12px;justify-content:space-between;padding-top:10px;padding-bottom:10px;font-size:14px}
.notice a{white-space:nowrap;font-weight:600;color:var(--accent-text)}
.acct-form{max-width:none;margin-top:14px}
.acct-row{display:grid;grid-template-columns:1fr;gap:12px}
@media (min-width:640px){.acct-row{grid-template-columns:1fr 1fr}}
.estate{font-size:12px;font-weight:600;margin-left:6px}
.estate.ok{color:var(--good)}.estate.no{color:var(--bad)}
.okmsg{color:var(--good);font-size:14px;min-height:1em}

/* placement test review */
.test-review .x{margin-bottom:10px}
.test-review .opt{cursor:default}
.test-review .tr-item.bad{border-color:var(--bad)}

/* books: covers, bilingual lines, word-by-word highlight, player */
.books-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.book-card{display:flex;gap:14px;text-decoration:none;align-items:stretch;padding:12px}
.book-card .cover{flex:none;width:86px;border-radius:12px;background:linear-gradient(160deg,var(--c1),var(--c2));display:flex;align-items:center;justify-content:center;font-size:38px;min-height:120px}
.book-card .bk-meta{display:flex;flex-direction:column;gap:4px;min-width:0;flex:1}
.book-card h3{font-size:18px;margin:2px 0}
.book-card.locked{opacity:.55}
.sheet.book{border-left:0;padding-top:0;overflow:hidden}
.bk-hero{margin:0 -22px 18px;padding:26px 22px;background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;display:flex;gap:16px;align-items:center}
.bk-hero .emoji{font-size:54px;line-height:1;filter:drop-shadow(0 4px 10px rgba(0,0,0,.25))}
.bk-hero h1{font-size:clamp(24px,5vw,34px);color:#fff;margin:6px 0 4px}
.bk-hero p{margin:0;opacity:.9;font-size:14px}
.bk-ch{font-size:22px;margin:0}.bk-ch small{display:block;font-family:var(--sans);font-size:14px;color:var(--muted);font-weight:500;margin-top:4px}
.bk-scene{font-style:italic;margin:6px 0 14px}
.bk-modes{position:sticky;top:calc(64px + env(safe-area-inset-top));z-index:10}
.bk-tools{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:0 0 10px;font-size:14px}
.bk-toggle{display:flex;align-items:center;gap:6px;font-weight:600;cursor:pointer}
.bk-toggle input{width:18px;height:18px;accent-color:var(--accent)}
.bk-text{margin-top:8px}
.bk-s{padding:8px 10px;margin:0 -10px;border-radius:12px;cursor:pointer;transition:background .2s}
.bk-s.cur{background:var(--accent-soft)}
.bk-tr{margin:0;font-family:var(--sans);font-size:14px;font-weight:600;color:var(--warm-ink);line-height:1.4}
.bk-en{margin:2px 0 0;font-size:19px;line-height:1.55}
.bk-en .bw{border-radius:4px;transition:background .12s}
.bk-en .bw.on{background:#F4B6B0;color:#1E1A15;box-shadow:0 0 0 2px #F4B6B0}
:root[data-theme=dark] .bk-en .bw.on{background:#7356FF;color:#fff;box-shadow:0 0 0 2px #7356FF}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .bk-en .bw.on{background:#7356FF;color:#fff;box-shadow:0 0 0 2px #7356FF}}
.no-tr .bk-tr{display:none}
.bk-x,.bk-checkrow,.bk-hint-tr{display:none}
.mode-translate .bk-x,.mode-translate .bk-checkrow,.mode-translate .bk-hint-tr{display:block}
.mode-translate .bk-tr,.mode-translate .bk-hint,.mode-translate .bk-toggle{display:none}
.mode-translate .bk-s{cursor:default}
.bk-x textarea{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:10px 12px;font:inherit;font-size:16px;background:var(--surface);color:var(--ink);margin-top:8px;resize:vertical}
.bk-x.g textarea{border-color:var(--good)}.bk-x.y textarea{border-color:#C9A227}.bk-x.r textarea{border-color:var(--bad)}
.bk-finish{margin:22px 0 4px}
.bk-player{position:fixed;left:0;right:0;bottom:calc(64px + env(safe-area-inset-bottom));z-index:25;display:flex;align-items:center;gap:10px;padding:10px max(14px,env(safe-area-inset-right)) 10px max(14px,env(safe-area-inset-left));background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:blur(10px);border-top:1px solid var(--line)}
@media (min-width:761px){.bk-player{bottom:0}}
.page:has(+ .bk-player),.bk-player{--pad:0}
body:has(.bk-player){padding-bottom:calc(150px + env(safe-area-inset-bottom))}
.bp-play{width:52px;height:52px;border-radius:50%;border:0;background:var(--accent);color:var(--accent-ink);font-size:20px;cursor:pointer;flex:none}
.bp-btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--surface);color:var(--ink);font-size:13px;font-weight:700;cursor:pointer;flex:none}
.bp-mid{flex:1;min-width:0}
.bp-bar{height:8px;border-radius:99px;background:var(--surface2);cursor:pointer;position:relative}
.bp-bar i{display:block;height:100%;width:0;border-radius:99px;background:var(--accent)}
.bp-time{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-top:4px;font-variant-numeric:tabular-nums}
#bp-speed{flex:none;min-width:52px}
.bk-modes button{white-space:nowrap;padding:10px 6px;font-size:15px}
@media (max-width:420px){.bk-modes button{font-size:14px}}
/* reading aloud: current sentence and word */
.rtext .rs{cursor:pointer}
.rs.cur{background:color-mix(in srgb,var(--accent-soft) 55%,transparent)}
.rw{border-radius:5px;transition:background .12s,color .12s}
.rw.on{background:var(--accent);color:var(--accent-ink);box-shadow:0 0 0 2px var(--accent)}
#read-listen.on{background:var(--accent);color:var(--accent-ink)}

/* tap a word: it lights up; a second word in the same sentence makes a phrase */
.en-text ::selection,.bk-en ::selection,.rtext ::selection,.ex ::selection,.q ::selection,.front ::selection,.tbl ::selection{background:#F4B6B0;color:#1E1A15}
:root[data-theme=dark] .en-text ::selection,:root[data-theme=dark] .bk-en ::selection,:root[data-theme=dark] .rtext ::selection{background:#7356FF;color:#fff}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .en-text ::selection,:root:not([data-theme=light]) .bk-en ::selection,:root:not([data-theme=light]) .rtext ::selection{background:#7356FF;color:#fff}}
.addword{max-width:calc(100vw - 16px);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.toast a{color:inherit;font-weight:700;margin-left:8px}
.mine-card{border:2px dashed var(--accent)}

.stat-link{text-decoration:none;color:inherit;border-color:var(--accent)}
.stat-link span{color:var(--accent-text)}

/* test of the day */
.daily-card{border:1.5px solid var(--accent)}
.dots{display:flex;gap:6px;margin-top:12px;flex-wrap:wrap}.dots i{font-style:normal;font-size:13px;font-weight:600;padding:5px 10px;border-radius:99px;background:var(--surface2);color:var(--muted);white-space:nowrap}.dots i b{font-weight:400}.dots i.on{background:var(--good-soft);color:var(--good)}.dots i.on b{display:none}.dots i.on::before{content:'✓ '}.dstate{display:flex;justify-content:space-between;align-items:center;margin-top:12px;font-size:14px}.dstate .dcount{color:var(--muted)}.dstate .dgo{font-weight:700;color:var(--accent-text)}
.dstats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:14px}
.dstats div{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:10px 8px;text-align:center}
.dstats b{display:block;font-size:22px;font-family:var(--serif)}.dstats span{font-size:12px;color:var(--muted)}
.dkinds{display:grid;gap:10px;margin-top:12px}
.dkind{display:flex;align-items:center;gap:14px}
.dkind .ic{font-size:30px;width:44px;text-align:center}
.dkind .tx{flex:1;min-width:0}.dkind h3{font-size:19px;margin:0}.dkind .muted{font-size:14px}
.dkind.done{border-color:var(--good)}
.dq .say{display:flex;justify-content:center;margin:8px 0 14px}
.dq .say .btn{font-size:18px;padding:16px 26px}
.dq .prompt{font-size:22px;font-weight:600;margin:6px 0 14px;line-height:1.35}
.dq .opts{display:grid;gap:8px}.dq .opt{text-align:left;font-size:17px;padding:14px 16px;min-height:52px}
.dres b.big{display:block;font-size:54px;font-family:var(--serif);line-height:1}
.drev .x{margin-bottom:10px}.drev .opt{cursor:default}

/* friends + chat */
.nbadge{display:inline-flex;align-items:center;justify-content:center;min-width:18px;height:18px;padding:0 5px;border-radius:99px;background:var(--bad);color:#fff;font:700 11px/1 var(--sans);letter-spacing:0}
.hdr-stat .nbadge{position:absolute;top:-4px;right:-4px}.hdr-stat{position:relative}
.frow{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}.frow:last-child{border-bottom:0}
.frow .who{flex:1;min-width:0}.frow .who b{display:block}.frow .who span{font-size:13px;color:var(--muted)}
.ava{width:40px;height:40px;border-radius:50%;background:var(--accent-soft);color:var(--accent-text);display:flex;align-items:center;justify-content:center;font-weight:700;flex:none}
.invite{display:flex;gap:8px;flex-wrap:wrap}.invite input{flex:1;min-width:0;border:1.5px solid var(--line);border-radius:12px;padding:10px 12px;font:inherit;background:var(--surface2);color:var(--ink)}
.league{width:100%;border-collapse:collapse}.league td{padding:8px 4px;border-bottom:1px solid var(--line)}.league tr.me td{font-weight:700}.league td:last-child{text-align:right}
.chat-head{position:sticky;top:calc(61px + env(safe-area-inset-top));z-index:5;background:var(--bg);display:flex;align-items:center;gap:10px;padding:12px 0;border-bottom:1px solid var(--line)}
.chat-head .who{flex:1;min-width:0}.chat-head .who b{display:block;font-size:18px}
.msgs{display:flex;flex-direction:column;gap:8px;padding:14px 0 140px}
.msg{max-width:84%;padding:10px 13px;border-radius:16px;background:var(--surface);border:1px solid var(--line);white-space:pre-wrap;word-wrap:break-word;font-size:16px}
.msg.mine{align-self:flex-end;background:var(--accent-soft);border-color:transparent}
.msg small{display:block;font-size:11px;color:var(--muted);margin-top:4px}
.msg.sys{align-self:center;background:none;border:0;color:var(--muted);font-size:13px;padding:2px}
.msg .card{margin:6px 0 0}.msg .opts{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}.msg .opt{cursor:default;padding:6px 10px;font-size:14px;min-height:0}
.msg .rep{background:none;border:0;color:var(--muted);font-size:11px;padding:0;margin-top:4px;cursor:pointer;text-decoration:underline}
.chscore{display:grid;grid-template-columns:1fr auto;gap:2px 10px;font-size:14px;margin:8px 0}
.composer{position:fixed;left:0;right:0;bottom:calc(64px + env(safe-area-inset-bottom));background:var(--bg);border-top:1px solid var(--line);z-index:20}
@media (min-width:761px){.composer{bottom:0}}
.composer .wrap{display:flex;gap:8px;padding-top:10px;padding-bottom:10px;max-width:760px}
.composer textarea{flex:1;resize:none;border:1.5px solid var(--line);border-radius:14px;padding:10px 12px;font:inherit;background:var(--surface);color:var(--ink);max-height:120px}
.helpbtn{margin-left:8px;font-size:13px}
.fpick{display:grid;gap:8px;margin:10px 0}.fpick button{text-align:left}
.notice .wrap{font-size:13px;padding-top:8px;padding-bottom:8px}
.chatpage footer,.chatpage .site-footer{display:none}
.msg .rep{opacity:.6}

/* terms page, footer link, guest nudge */
.terms h2{font-size:22px;margin-bottom:8px}
.terms p{margin:0 0 10px;line-height:1.6}
footer a{color:inherit}
.notice .x{background:none;border:0;font-size:18px;line-height:1;color:var(--muted);cursor:pointer;padding:4px 6px}
.danger{color:var(--bad)}
.btn.danger{background:var(--bad);color:#fff}

/* my dictionary */
.search{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:11px 14px;font:inherit;background:var(--surface);color:var(--ink)}
.mw-row{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;padding:12px 4px;border-bottom:1px solid var(--line)}
.mw-row:last-child{border-bottom:0}
.mw-row .t b{font-size:17px}
.mw-row .t small{display:block;color:var(--muted);font-style:italic;font-size:13px;margin-top:2px}
.mw-row .acts{display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.mw-row .lrn{font-size:11px;font-weight:600;color:var(--good);margin-left:6px}
a.stat-link{text-decoration:none;color:inherit}
a.stat-link .card{border-color:var(--accent)}
a.stat-link span::after{content:" →";color:var(--accent-text)}

/* path: exercise results and stars */
.node .pstars{font-size:13px;letter-spacing:1px;color:#E0A100}
.node .pstars i{font-style:normal;color:var(--line)}
.node .pscore{font-size:12px;font-weight:700;color:var(--muted)}
.node.done .pscore{color:var(--good)}
.node.low .dot{border-color:#E0A100}
.path-stars{font-family:var(--sans);font-size:14px;font-weight:600;color:var(--muted)}
.prev-level summary{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.prev-level .rows{margin-top:10px}
.prev-level a.row{display:grid;grid-template-columns:1fr auto auto;gap:10px;align-items:center;text-decoration:none;padding:9px 2px;border-bottom:1px solid var(--line)}
.prev-level a.row:last-child{border-bottom:0}
.prev-level .row .pstars{color:#E0A100;letter-spacing:1px}
.prev-level .row .pstars i{font-style:normal;color:var(--line)}

/* invite link: shown whole, wraps on a phone; copy/share as two equal buttons */
.inv-link{margin:12px 0 10px;padding:12px 14px;border-radius:12px;background:var(--surface2);font:500 14px/1.45 ui-monospace,SFMono-Regular,Menlo,monospace;word-break:break-all;overflow-wrap:anywhere;-webkit-user-select:text;user-select:text}
.inv-actions{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:8px}
.inv-actions .btn{width:100%}
.btn.copied{background:var(--good);color:#fff}
.toast{max-width:min(92vw,420px);text-align:center}

/* long-press selection grabs only the English line, never the translation over it */
.bk-tr{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}

/* "you were challenged" bar under the header */
.chbar{padding:10px 0 2px}
.chcard{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:16px;color:#fff;
  background:linear-gradient(120deg,#4B1FE0 0%,#7A3CFF 55%,var(--accent) 140%);box-shadow:0 8px 24px rgba(75,31,224,.25)}
.chava{position:relative;flex:none;width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.18);border:2px solid rgba(255,255,255,.55);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px}
.chava i{position:absolute;right:-4px;bottom:-4px;width:22px;height:22px;border-radius:50%;background:#FFD24A;font-style:normal;font-size:12px;
  display:flex;align-items:center;justify-content:center;box-shadow:0 0 0 2px #5a2cf0}
.chcard .t{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px;line-height:1.3}
.chcard .t b{font-size:16px;font-weight:700}
.chcard .t small{font-size:13px;opacity:.85}
.chmore{display:inline-block;margin-left:6px;padding:0 7px;border-radius:999px;background:rgba(255,255,255,.22);font-size:12px;font-weight:600;vertical-align:2px}
.chbtns{display:flex;gap:8px;align-items:center;flex:none}
.chcard a.go{background:#fff;color:#4B1FE0;border-radius:999px;padding:0 16px;font-weight:700;text-decoration:none;white-space:nowrap;min-height:42px;display:inline-flex;align-items:center}
.chcard button.x{background:rgba(255,255,255,.14);border:0;color:#fff;border-radius:999px;padding:0 14px;min-height:42px;font:inherit;font-size:14px;font-weight:600;cursor:pointer}
@media (max-width:560px){.chcard{flex-wrap:wrap}.chcard .t{flex-basis:calc(100% - 56px)}.chbtns{flex-basis:100%}.chcard a.go{flex:1;justify-content:center}}
/* home: everything the learner has done */
.act-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.act-grid a{display:flex;flex-direction:column;gap:2px;text-decoration:none;padding:14px 16px}
.act-grid .ico{font-size:22px;line-height:1}
.act-grid .lbl{font-size:13px;font-weight:600;color:var(--muted);margin-top:4px}
.act-grid b{font-family:var(--serif);font-size:28px;line-height:1.1}
.act-grid small{font-size:12px;color:var(--muted);line-height:1.35}
@media (max-width:420px){.act-grid{grid-template-columns:1fr 1fr}}

/* ---------- profile ---------- */
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.prof .card{border-radius:18px}
.pf-hero{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px;padding:26px 18px 20px;
  background:linear-gradient(160deg,var(--accent-soft),var(--surface) 60%)}
.pf-ava{width:76px;height:76px;border-radius:50%;display:flex;align-items:center;justify-content:center;font:700 32px var(--serif);color:#fff;
  background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--accent) 55%,#7a3cff));box-shadow:0 6px 20px color-mix(in srgb,var(--accent) 35%,transparent)}
.pf-hero h3{font-size:26px;margin:6px 0 0}
.pf-hero .who{color:var(--muted);font-size:15px}
.pf-tags{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin-top:6px}
.pf-tag{display:inline-flex;align-items:center;gap:4px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:4px 10px;font-size:13px;font-weight:600}
.pf-acts{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:12px}
.pf-hero p.lead{font-size:15px;margin:4px 0 0;max-width:420px}
.pf-stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:12px 0}
.pf-stats .card{padding:12px 10px;text-align:center;border-radius:16px}
.pf-stats .card i{font-style:normal;font-size:18px;display:block;line-height:1}
.pf-stats .card b{font-size:24px;margin-top:4px;line-height:1.1}
.pf-stats .card span{font-size:12px;line-height:1.25;display:block;margin-top:2px}
.pf-sec{margin-top:12px;padding:18px}
.pf-h{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.pf-h h2{font-size:20px;margin:0}
.pf-level{font:700 22px var(--serif);margin:0 0 12px}
.pf-bars{display:flex;flex-direction:column;gap:10px}
.pf-ach{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:0}
.pf-ach div{padding:10px 6px;border-radius:14px}
.pf-ach div i{font-size:24px}
.pf-ach div b{font-size:12px;line-height:1.25;margin-top:4px}
.pf-ach div small{display:none}
.pf-ach.short div:nth-child(n+7){display:none}
.linkbtn{background:none;border:0;color:var(--accent-text);font-weight:600;font-size:14px;padding:10px 0 0;cursor:pointer}
.pf-group{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-family:var(--sans);font-weight:700;margin:26px 4px 8px}
.pf-list{padding:2px 18px}
.pf-row,.pf-list details>summary{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);min-height:56px}
.pf-list>div:last-child>.pf-row:last-child,.pf-list>.pf-row:last-child,.pf-list>div:last-child>details:last-child>summary{border-bottom:0}
.pf-rt{display:flex;flex-direction:column;min-width:0}
.pf-rt b{font-size:16px}
.pf-rt small{font-size:13px;color:var(--muted);line-height:1.35;overflow:hidden;text-overflow:ellipsis;white-space:pre-line}
/* Safari must not turn e-mails, phones and words into underlined links */
a[x-apple-data-detectors]{color:inherit!important;text-decoration:none!important;font:inherit!important}
.pf-list details>summary{list-style:none;cursor:pointer}
.pf-list details>summary::-webkit-details-marker{display:none}
.pf-list details>summary::after{content:'›';font-size:24px;color:var(--muted);transition:transform .2s;line-height:1}
.pf-list details[open]>summary::after{transform:rotate(90deg)}
.pf-list details[open]>summary{border-bottom:0}
.pf-list details .form{max-width:none;padding:0 0 16px;border-bottom:1px solid var(--line)}
.pf-list>div:last-child>details:last-child .form{border-bottom:0}
.seg{display:inline-flex;background:var(--surface2);border-radius:12px;padding:3px;gap:2px;flex-wrap:wrap;justify-content:flex-end}
.seg a,.seg button{border:0;background:none;border-radius:9px;padding:7px 10px;font:600 13px var(--sans);color:var(--muted);text-decoration:none;cursor:pointer;white-space:nowrap}
.seg .on{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.switch{appearance:none;-webkit-appearance:none;flex:none;width:50px;height:30px;border-radius:999px;background:var(--line);position:relative;cursor:pointer;transition:background .2s;margin:0}
.switch::after{content:'';position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.25);transition:transform .2s}
.switch:checked{background:var(--good)}
.switch:checked::after{transform:translateX(20px)}
.pf-logout{margin-top:12px;padding:0}
.pf-logout button{width:100%;background:none;border:0;padding:16px;font:600 16px var(--sans);color:var(--accent-text);cursor:pointer;border-radius:18px}
.pf-danger-t{color:var(--bad)}
.pf-danger{border:1px solid color-mix(in srgb,var(--bad) 35%,var(--line))}
.danger-ghost{color:var(--bad)!important}
.pf-danger details>summary b{color:var(--bad)}
.pf-rt{flex:1}
.pf-row>.btn,.pf-row>.switch{flex:none}
@media (max-width:440px){.seg a,.seg button{padding:7px 8px;font-size:12.5px}.pf-row.pf-seg{flex-wrap:wrap}.pf-row.pf-seg .seg{margin-left:auto}}
/* tapped word: our own light; no iOS long-press menu or magnifier on lesson text */
::highlight(tapword){background-color:var(--accent);color:var(--accent-ink)}
.bk-en,.rtext,.en-text,.ex .en,.x .q,.w-en b,.opt{-webkit-touch-callout:none}
@media (pointer:coarse){.bk-en,.rtext,.en-text,.ex .en,.x .q,.w-en b,.opt{-webkit-user-select:none;user-select:none}}
.addword{max-width:calc(100vw - 16px);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
body{overflow-x:clip}
/* bottom sheets sit above the on-screen keyboard in every browser (see keyboardInset in app.js) */
.modal{padding-bottom:calc(env(safe-area-inset-bottom) + var(--kb,0px))}
.modal .card{max-height:calc(var(--vvh,100dvh) - 32px);overflow-y:auto;-webkit-overflow-scrolling:touch}
/* iPhone (Safari and Chrome alike) sends no click for a tap on plain text unless the element looks
   clickable — without this the tap-a-word handler never fires on iOS */
.bk-en,.rtext,.en-text,.ex .en,.x .q,.w-en b,.tr-item .opt,.faq .tbl td:first-child{cursor:pointer}

/* phones: the whole lesson area makes no system selection (numbers and card edges used to drag the whole block in) */
@media (pointer:coarse){main .sheet,main .x,main .rx,main .bk-s,main .rs,main .ask{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}main input,main textarea{-webkit-user-select:text;user-select:text}}

/* the chosen word: our own mark (works on every phone) */
mark.tapmark{background:var(--accent);color:var(--accent-ink);border-radius:4px;box-shadow:0 0 0 2px var(--accent)}

/* QA fixes */
.toast{left:0;right:0;margin:0 auto;width:fit-content;transform:none;border-radius:18px;z-index:80}
.addword{white-space:normal;text-overflow:clip;text-align:left;line-height:1.3;max-width:min(92vw,420px)}
.err:empty,.okmsg:empty{display:none}
:root[data-theme=dark] .btn.danger{background:#C2412D;color:#fff}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .btn.danger{background:#C2412D;color:#fff}}
.dq .q u,.dq u{display:inline-block;min-width:2.6em;text-decoration:none;border-bottom:2px solid var(--accent)}
.stbl th:first-child,.stbl td:first-child{position:sticky;left:0;background:var(--surface);z-index:1}
.chart i.v{background:color-mix(in srgb,var(--muted) 45%,transparent)}
@media (pointer:coarse){
  .langsw a,.iconbtn,.chip,.btn.small,.hdr-stat{min-height:40px}
  .langsw a{min-width:40px;display:inline-flex;align-items:center;justify-content:center}
  .iconbtn{min-width:40px}
  .notice a,.pager a{display:inline-flex;align-items:center;min-height:40px}
}
@media (max-width:380px){.brand{font-size:17px}.top .wrap{gap:8px}}

/* topic cards: the level badge keeps its size, the star stays clear of it */
.topic-card .badge{align-self:flex-start}
.topic-card .star{position:absolute;top:12px;right:12px}
.topic-card{position:relative}
/* review: today's cards first, then level · tabs · search, then decks */
.rv-hero{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:16px 0 4px;padding:18px 20px;
  background:linear-gradient(120deg,var(--accent-soft),var(--surface))}
.rv-num{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.rv-num b{font:700 44px/1 var(--serif);color:var(--accent-text)}
.rv-num span{color:var(--muted);font-weight:500}
.rv-hero.rv-clear .rv-num b{color:var(--good)}
.rv-acts{display:flex;gap:8px;flex-wrap:wrap}
.rv-bar{position:sticky;top:calc(60px + env(safe-area-inset-top));z-index:12;background:var(--bg);padding:12px 0 10px;margin:8px 0 4px;display:grid;gap:10px;
  grid-template-columns:auto 1fr;align-items:center;border-bottom:1px solid var(--line)}
.rv-chips{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.rv-chips::-webkit-scrollbar{display:none}
.rv-chips .chip{min-height:38px;padding:7px 16px}
.rv-tabs{display:flex;background:var(--surface2);border-radius:999px;padding:4px;gap:2px;justify-self:end}
.rv-tabs button{border:0;background:none;border-radius:999px;padding:8px 14px;font-weight:600;color:var(--muted);cursor:pointer;min-height:38px;white-space:nowrap}
.rv-tabs button.on{background:var(--surface);color:var(--ink);box-shadow:var(--shadow)}
.rv-search{grid-column:1/-1;width:100%;border:1.5px solid var(--line);border-radius:12px;padding:10px 14px;font:inherit;background:var(--surface);color:var(--ink)}
@media (max-width:640px){.rv-bar{grid-template-columns:1fr}.rv-tabs{justify-self:stretch}.rv-tabs button{flex:1;padding:8px 6px}.rv-hero{padding:16px}.rv-acts{width:100%}.rv-acts .btn{flex:1}}
.rv-deck .rv-top{display:flex;justify-content:space-between;align-items:center;gap:8px}
.rv-due{font-size:12px;font-weight:700;color:var(--accent-ink);background:var(--accent);border-radius:999px;padding:2px 9px}
.rv-deck.rv-done{opacity:.72}
.rv-deck.rv-done .meta{color:var(--good);font-weight:600}
.rv-group .grid{display:grid}
.rv-found{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin:14px 0 8px}
.rv-list{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.rv-list li{display:grid;grid-template-columns:auto 1fr auto;grid-template-areas:"lv en go" "lv tr go";gap:2px 10px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.rv-list .badge{grid-area:lv}.rv-list .rv-en{grid-area:en;font-weight:600}.rv-list .rv-tr{grid-area:tr;color:var(--muted);font-size:14px}.rv-list .iconbtn{grid-area:go;min-width:40px;min-height:40px}
.rv-minecard{margin-top:16px}

/* profile: the placement test is the starting point of "my level" */
.pf-test{background:var(--surface2);border-radius:12px;padding:12px 14px;margin:0 0 16px;font-size:14px;line-height:1.5}
.pf-test b{font-size:15px}
.pf-test .sc{color:var(--muted);font-size:13px}
.pf-test a{color:var(--accent-text);font-weight:600;white-space:nowrap}

/* a new e-mail waiting for its link */
.pending{background:var(--accent-soft);border-radius:12px;padding:10px 12px;font-size:14px;line-height:1.45;margin:0}

/* guests: closed pages wait for the account check; sign-up cards */
body[data-gate="closed"]:not(.auth-ok) main{visibility:hidden}
body:not(.auth-ok) .hdr-stat{visibility:hidden}
.hdr-login{display:inline-flex;align-items:center;min-height:38px;padding:0 16px;border-radius:999px;background:var(--accent);color:var(--accent-ink);font-weight:700;font-size:14px;text-decoration:none;white-space:nowrap}
.gate{text-align:center;padding:28px 20px;margin-top:16px}
.gate .big{font-size:38px;display:block;margin-bottom:6px}
.gate h2{font-size:22px;margin:0 0 8px}
.gate p{max-width:460px;margin:0 auto 12px}
.gate-acts{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:16px auto 0!important}
.guest-inside ul{list-style:none;padding:0;margin:12px 0 18px;display:grid;gap:10px}
.guest-inside li{background:var(--surface2);border-radius:12px;padding:12px 14px;line-height:1.4}
.score .guest-cta{background:var(--accent-soft);border-radius:12px;padding:12px 14px;margin:12px 0 4px;font-weight:600}

/* typical mistakes */
.mk-pair{display:grid;gap:8px;margin-top:10px}
.mk-wrong,.mk-right{display:flex;align-items:center;gap:10px;border-radius:12px;padding:12px 14px;font-size:17px;line-height:1.4}
.mk-wrong{background:var(--bad-soft);color:var(--ink)}
.mk-wrong span:last-child{text-decoration:line-through;text-decoration-color:var(--bad);text-decoration-thickness:2px;opacity:.85}
.mk-right{background:var(--good-soft)}
.mk-right .iconbtn{margin-left:auto}
.mk-ic{flex:none;width:26px;height:26px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-weight:800;color:#fff}
.mk-wrong .mk-ic{background:var(--bad)}.mk-right .mk-ic{background:var(--good)}
.mk-why{margin:10px 2px 0;color:var(--muted);line-height:1.5}
.mk-banner{display:flex;align-items:center;gap:14px;text-decoration:none;margin:14px 0 18px;background:linear-gradient(120deg,var(--accent-soft),var(--surface))}
.mk-banner b{display:block;font-size:17px;margin-bottom:2px}
.mk-banner .muted{font-size:14px;line-height:1.4}
.mk-big{font-size:30px;flex:none}
.mk-banner .go{margin-left:auto;font-size:22px;color:var(--accent-text)}

/* Portugal scenes: a two-voice dialogue */
.dl-line{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;align-items:start;margin:12px 0}
.dl-who{font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;padding-top:6px;min-width:64px;max-width:92px;line-height:1.2}
.dl-b{border-radius:14px;padding:10px 14px;background:var(--surface2)}
.dl-B .dl-b{background:var(--accent-soft)}
.dl-b .rs{font-size:17px;line-height:1.45;display:block}
.dl-b .tr{color:var(--muted);font-size:14px;margin-top:4px}
.dl-line .rs.cur{background:none}
@media (max-width:480px){.dl-line{grid-template-columns:1fr}.dl-who{padding-top:0}}
.dl-b:has(.rs.cur){box-shadow:0 0 0 2px var(--accent)}

/* listening: hidden transcript, word chips, dictation */
.dl-hide .dl-b .rs,.dl-hide .dl-b .tr{filter:blur(6px);user-select:none;-webkit-user-select:none;transition:filter .2s}
.xa-play{margin:6px 0 10px}
.xa-play.playing{border-color:var(--accent);color:var(--accent-text)}
.xo-built{min-height:48px;border:1.5px dashed var(--line);border-radius:12px;padding:8px;display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.xo-built .xo-chip{background:var(--accent-soft);border-color:var(--accent-soft)}
.xo-chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}
.xo-chip{min-height:40px;font-size:16px;color:var(--ink)}
.xo-chip.used{visibility:hidden}
.xa.done .xo-chip{pointer-events:none}
.xa-dict input.right,.xa-order .xo-built.right{border-color:var(--good)}
.xa-dict input.wrong,.xa-order .xo-built.wrong{border-color:var(--bad)}

/* units (roadmap 2.1) */
.unode .dot{font-size:28px}.unode.done .dot{font-size:22px}
.unode .ucando{font-size:12px;font-weight:500;color:var(--muted);max-width:220px;width:220px}
.node.unode{width:170px}
.unit-h{display:flex;align-items:center;gap:12px;font-size:clamp(28px,5vw,40px);margin:6px 0 14px}
.uemoji{font-size:1.1em;line-height:1}
.unit-goal p{font-size:18px;line-height:1.4;margin:6px 0 12px;font-weight:600}
.unit-goal .muted{display:block;margin-top:8px;font-size:13px}
.unit-done{margin-top:12px;border-color:var(--good)}.unit-done h2{font-size:22px;margin:0 0 4px}
.unit-cta{margin:16px 0 4px}.unit-cta .btn{width:100%;justify-content:center}
.usteps{list-style:none;padding:0;margin:16px 0;display:flex;flex-direction:column;gap:8px}
.ustep{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:16px;background:var(--surface);border:1px solid var(--line);text-decoration:none;color:inherit;min-height:64px}
.ustep .uic{width:42px;height:42px;border-radius:50%;background:var(--surface2);display:flex;align-items:center;justify-content:center;font-size:20px;flex:none}
.ustep .ubody{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.ustep .ukind{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-weight:600}
.ustep b{font-weight:600;font-size:15px;line-height:1.3}
.ustep .ustate{font-size:13px;color:var(--muted);white-space:nowrap;font-weight:600}
.ustep.done .uic{background:var(--good-soft)}.ustep.done .ustate{color:var(--good);font-size:18px}
.ustep.next{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.unit-card{text-decoration:none;display:flex;flex-direction:column;gap:6px}.unit-card h3{margin:0;font-size:20px}.unit-card p{margin:0 0 6px;font-size:14px}
.unit-card .state{font-size:13px}.unit-card.done{border-color:var(--good)}.unit-card.locked{opacity:.6}
.unit-card.done .bar i,.unit-page.is-done .unit-goal .bar i{background:var(--good)}

/* checkpoints, exam, certificate (roadmap 2.2) */
.ustep.ucp{border-style:dashed}.ustep.ucp .uic{background:var(--accent-soft)}.ustep.ucp.done{border-style:solid}
.node.locked .dot{opacity:.55}.node.locked>span{opacity:.75}.node.exam .dot{font-size:28px}
.unit-card.locked .bar i{opacity:.4}
.exam-card{display:flex;align-items:center;gap:14px;margin-top:12px;text-decoration:none;border-style:dashed}.exam-card .uemoji{font-size:34px}
.exam-card .ubody{display:flex;flex-direction:column;gap:2px}.exam-card.done{border-style:solid;border-color:var(--good)}.exam-card.locked{opacity:.65}
.unit-lock{margin-top:16px}.unit-lock h2{margin:6px 0}
.cp-intro p{margin:0 0 8px}
.cp-result{text-align:center}.cp-result b{font-size:56px;font-family:var(--serif);display:block;line-height:1.1}.cp-result.pass b{color:var(--good)}
.cp-w{padding:8px 0;border-top:1px solid var(--line)}.cp-w:first-of-type{border-top:0}.cp-w .q{margin-bottom:2px}
.cert-cv{display:block;width:100%;max-width:440px;height:auto;margin:0 auto;border-radius:14px;box-shadow:var(--shadow)}
.cert-name{display:flex;flex-direction:column;gap:6px;max-width:440px;margin:16px auto 0;font-size:14px;font-weight:600}
.cert-name input{font:inherit;font-weight:500;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--ink);min-height:48px}
.cert-acts{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin:14px 0 8px}
.node.exam{width:170px}.node.exam.done .dot{font-size:22px}

/* irregular verbs (roadmap 2.7) */
.vtabs{margin:14px 0}
.vtable td{vertical-align:top}.vtable td small{display:block;color:var(--muted);font-size:13px;margin-top:2px}.vtable{table-layout:fixed;width:100%}.vtable th:first-child{width:42%}.vtable th,.vtable td{padding-left:8px;padding-right:8px}.vtable td:nth-child(n+2){font-weight:600;overflow-wrap:anywhere}
.vtable .vb{display:flex;align-items:center;gap:6px}.vtable .vb b{font-size:16px}
.vin{display:flex;gap:8px;flex-wrap:wrap}.vin input{flex:1;min-width:130px;font:inherit;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:var(--surface);color:var(--ink);min-height:48px}
.vin input.right{border-color:var(--good);background:var(--good-soft)}.vin input.wrong{border-color:var(--bad);background:var(--bad-soft)}

/* friend quest (roadmap 2.3) */
.qrow .who{flex:1;min-width:0}.qrow .bar{max-width:260px}.qact{white-space:nowrap;font-size:14px;text-align:right}

/* mini-courses (roadmap 2.5) */
.course-card .eyebrow{display:flex;gap:8px;align-items:center}
.ustep.locked{opacity:.6}.course-page .ustep .uic{font-weight:800;font-size:18px}

/* news of the week (roadmap 2.6) */
.news-text{font-size:19px;line-height:1.65;margin:0}.news-text .ns{display:inline}
.news-acts{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 0}
.news-trs{margin-top:12px;padding-top:12px;border-top:1px solid var(--line)}.news-trs p{margin:0 0 8px;color:var(--muted);font-size:15px}
.news-score{text-align:center}.news-score b{display:block;font-size:28px;font-family:var(--serif)}

/* shadowing (roadmap 3.1) */
.notice-line{background:var(--surface2);border-radius:12px;padding:12px 14px;font-size:14px;margin:0 0 14px}
.sh-card .sh-en{font-family:var(--serif);font-size:clamp(24px,6vw,32px);line-height:1.35;margin:10px 0 6px}
.sh-en span{padding:0 1px;border-radius:4px}.sh-en .sh-ok{color:var(--good)}.sh-en .sh-miss{color:var(--bad);text-decoration:underline wavy;text-underline-offset:4px}
.sh-tr{margin:0 0 4px}.sh-acts{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 0}
.sh-score{font-size:18px;margin:14px 0 4px}.sh-score b{font-size:32px;font-family:var(--serif)}.sh-score.good b{color:var(--good)}

/* AI writing check and role-plays (roadmap 3.2, 3.3) */
.wr-text{width:100%;box-sizing:border-box;font:inherit;font-size:17px;line-height:1.5;padding:14px;border-radius:14px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);resize:vertical;min-height:180px}
.wr-bar{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:10px 0 14px}
.wr-out h3{font-size:17px;margin:16px 0 6px}.wr-out p{margin:6px 0}.wr-head{font-size:16px}
.wr-fix{padding:8px 0;border-top:1px solid var(--line)}.wr-fix:first-of-type{border-top:0}.wr-old{color:var(--bad);text-decoration:line-through}.wr-new{color:var(--good);font-weight:600}.wr-fix p{margin:2px 0 0;font-size:14px}
.wr-improved{white-space:pre-wrap;background:var(--surface2);border-radius:12px;padding:12px}.wr-tips{margin:0;padding-left:20px}
.rp-log{display:flex;flex-direction:column;gap:10px;margin:0 0 12px}
.rp-msg{max-width:86%;padding:10px 14px;border-radius:18px;line-height:1.45;display:flex;gap:8px;align-items:flex-start;flex-wrap:wrap}
.rp-msg.ai{align-self:flex-start;background:var(--surface);border:1px solid var(--line)}.rp-msg.me{align-self:flex-end;background:var(--accent);color:var(--accent-ink);flex-direction:column;align-items:flex-start}
.rp-msg.typing{opacity:.6;font-style:italic}.rp-fix{font-size:13px;background:rgba(255,255,255,.18);border-radius:10px;padding:6px 8px;margin-top:6px}.rp-fix .muted{color:inherit;opacity:.85}
.rp-hints{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin:0 0 10px}.rp-in{display:flex;gap:8px}.rp-in input{flex:1;min-width:0;font:inherit;padding:12px 14px;border-radius:12px;border:1.5px solid var(--line);background:var(--surface);color:var(--ink);min-height:48px}
.rp-msg.ai{flex-wrap:nowrap}.rp-msg.ai>span{flex:1;min-width:0}.rp-msg .iconbtn{flex:none}
.wr-text{min-height:140px}

/* favourites filter: lit star + counter */
.chip .fav-ic{opacity:.7}.chip.has .fav-ic{color:var(--accent);opacity:1;text-shadow:0 0 10px var(--accent-soft)}
.chip-n{display:inline-block;min-width:20px;padding:0 6px;margin-left:6px;border-radius:999px;background:var(--accent);color:var(--accent-ink);font-size:12px;font-weight:700;line-height:20px;text-align:center}