/* Layout: single flip card centred on a cool signage-grey ground, deck tabs above, overview grid below.
   Pictograms use ink strokes with one orange highlight, like a safety sign. */
:root{
  --bg:#E8EFF1; --paper:#FFFFFF; --ink:#13262E; --ink-soft:#4A6068; --line:#C5D3D7;
  --fig:#B7CBD1; --hair:#3C505A; --hi:#E8612D; --hi-ink:#FFFFFF; --tongue:#E9A1A1;
  --accent:#0A7B73; --accent-ink:#FFFFFF;
  --f-vi:'Be Vietnam Pro','Segoe UI',system-ui,sans-serif;
  --f-ja:'Zen Maru Gothic','Hiragino Maru Gothic ProN','Hiragino Sans','Noto Sans JP',sans-serif;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0F1A1F; --paper:#16262D; --ink:#E7F0F2; --ink-soft:#9DB4BB; --line:#2A3E46;
    --fig:#3E5762; --hair:#8CA6AF; --hi:#FF8A57; --hi-ink:#2A1206; --tongue:#C46A6A;
    --accent:#3CC4B8; --accent-ink:#06201D; color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0F1A1F; --paper:#16262D; --ink:#E7F0F2; --ink-soft:#9DB4BB; --line:#2A3E46;
  --fig:#3E5762; --hair:#8CA6AF; --hi:#FF8A57; --hi-ink:#2A1206; --tongue:#C46A6A;
  --accent:#3CC4B8; --accent-ink:#06201D; color-scheme:dark;
}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--f-ja);padding-inline:16px;padding-block:22px 48px;margin:0;line-height:1.5}
.wrap{max-width:560px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
header{display:flex;flex-direction:column;gap:2px}
h1{font-size:1.3rem;margin:0;font-weight:700;text-wrap:balance}
.sub{color:var(--ink-soft);font-size:.82rem;margin:0}
.row{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.tab,.opt,.btn{font:inherit;color:var(--ink);cursor:pointer}
.tab{border:1.5px solid var(--line);background:transparent;padding:6px 13px;border-radius:999px;font-size:.85rem}
.tab[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:700}
.tab small{opacity:.75;margin-left:4px;font-variant-numeric:tabular-nums}
.opt{border:1.5px solid var(--line);background:transparent;padding:5px 11px;border-radius:8px;font-size:.78rem}
.opt[aria-pressed="true"]{border-color:var(--accent);color:var(--accent);font-weight:700}
.lab{font-size:.78rem;color:var(--ink-soft)}
.bar{height:6px;border-radius:3px;background:var(--line);overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);width:0;transition:width .3s}
.scene{perspective:1400px}
.card{position:relative;height:372px;cursor:pointer;outline:none}
.card:focus-visible .inner{outline:3px solid var(--accent);outline-offset:3px;border-radius:22px}
.inner{position:absolute;inset:0;transform-style:preserve-3d;transition:transform .45s cubic-bezier(.3,.7,.3,1)}
.card.flipped .inner{transform:rotateY(180deg)}
.card.noanim .inner{transition:none}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border:2px solid var(--line);border-radius:22px;background:var(--paper);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:18px 16px;text-align:center}
.face.back{transform:rotateY(180deg);border-color:var(--accent)}
.pic{height:196px;width:100%;max-width:100%;display:block}
.back .pic{height:150px}
.big{font-weight:700;font-size:1.85rem;line-height:1.25;text-wrap:balance;overflow-wrap:anywhere;min-width:0}
.big.vi{font-family:var(--f-vi)}
.big.ja{font-family:var(--f-ja)}
.small{font-size:1.05rem;color:var(--ink-soft);overflow-wrap:anywhere}
.small.vi{font-family:var(--f-vi)}
.note{font-size:.8rem;color:var(--ink-soft);max-width:34ch;text-wrap:balance}
.hint{font-size:.74rem;color:var(--ink-soft);letter-spacing:.06em}
.tagk{position:absolute;top:12px;right:14px;font-size:.72rem;font-weight:700;color:var(--accent);letter-spacing:.06em}
.ctl{display:grid;grid-template-columns:1fr 1fr 1fr;gap:8px}
.btn{border:1.5px solid var(--line);background:var(--paper);border-radius:12px;padding:11px 8px;font-size:.92rem;font-weight:700}
.btn.main{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn[aria-pressed="true"]{border-color:var(--accent);color:var(--accent)}
.btn:focus-visible,.tab:focus-visible,.opt:focus-visible,.cell:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.meta{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:.82rem;color:var(--ink-soft);font-variant-numeric:tabular-nums}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(76px,1fr));gap:8px}
.cell{position:relative;border:1.5px solid var(--line);background:var(--paper);border-radius:12px;padding:8px 4px 6px;font:inherit;color:var(--ink);cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:4px;min-width:0}
.cell[aria-current="true"]{border-color:var(--accent);border-width:2px}
.cell svg{height:46px;width:100%}
.cell span{font-size:.68rem;line-height:1.2;font-family:var(--f-vi);overflow-wrap:anywhere;text-align:center;color:var(--ink-soft)}
.cell.done::after{content:"";position:absolute;top:6px;right:6px;width:9px;height:9px;border-radius:50%;background:var(--accent)}
.empty{padding:36px 12px;text-align:center;color:var(--ink-soft);border:2px dashed var(--line);border-radius:22px}
.fine{font-size:.74rem;color:var(--ink-soft);margin:0;text-wrap:pretty}
.fine:empty{display:none}
.prac{border:2px solid var(--line);border-radius:22px;background:var(--paper);padding:16px;display:flex;flex-direction:column;gap:12px}
.pracHead{display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.prac h2{margin:0;font-size:1rem}
.target{display:flex;flex-direction:column;gap:2px}
.tv{font-family:var(--f-vi);font-weight:700;font-size:1.5rem;overflow-wrap:anywhere}
.tj{font-size:.85rem;color:var(--ink-soft)}
.mic{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;border:0;border-radius:16px;background:var(--accent);color:var(--accent-ink);font:inherit;font-weight:700;font-size:1.05rem;padding:15px 12px;cursor:pointer}
.mic:disabled{opacity:.5}
.mic.listening{background:var(--hi);color:var(--hi-ink);animation:pulse 1.2s ease-in-out infinite}
.mic:focus-visible{outline:3px solid var(--ink);outline-offset:2px}
@keyframes pulse{50%{transform:scale(.985)}}
.res{display:flex;flex-direction:column;gap:10px}
.stars{display:flex;align-items:center;gap:3px}
.stars svg{width:30px;height:30px}
.stars .on{fill:var(--hi)} .stars .off{fill:none;stroke:var(--line);stroke-width:1.6}
.stars b{margin-left:8px;font-size:1.05rem;font-variant-numeric:tabular-nums}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{display:flex;flex-direction:column;align-items:center;min-width:0;padding:4px 10px 3px;border-radius:10px;border:2px solid var(--accent);font-family:var(--f-vi);font-weight:700;font-size:1.05rem;line-height:1.2}
.chip small{font-family:var(--f-ja);font-size:.62rem;font-weight:500;color:var(--ink-soft)}
.chip.tone{border-color:var(--hi);border-style:dashed}
.chip.bad{border-color:var(--hi);background:var(--hi);color:var(--hi-ink)}
.chip.bad small{color:var(--hi-ink)}
.chip.miss,.chip.extra{border-color:var(--hi);color:var(--hi)}
.heard{font-size:.85rem;color:var(--ink-soft);overflow-wrap:anywhere}
.heard span{font-family:var(--f-vi);color:var(--ink)}
.cmt{margin:0;font-size:.92rem}
.adv{margin:0;padding-left:1.2em;display:flex;flex-direction:column;gap:6px;font-size:.88rem}
.err{margin:0;font-size:.9rem;color:var(--ink)}
.btn{display:flex;align-items:center;justify-content:center;gap:6px;padding-inline:6px}
#known[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.ic{width:20px;height:20px;flex:none;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.listen{border:2px solid var(--line);border-radius:22px;background:var(--paper);padding:16px;display:flex;flex-direction:column;gap:14px}
.listen h2{margin:0;font-size:1rem}
.lgroup{display:flex;flex-direction:column;gap:6px}
.modes{display:flex;flex-wrap:wrap;gap:8px}
.mode{display:flex;align-items:center;gap:3px;border:1.5px solid var(--line);background:transparent;border-radius:10px;padding:6px 8px;cursor:pointer}
.mode[aria-pressed="true"]{border-color:var(--accent);border-width:2px;padding:5.5px 7.5px}
.mode:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.s{display:inline-grid;place-items:center;width:22px;height:22px;border-radius:6px;font:700 .72rem/1 var(--f-vi);font-style:normal}
.s.v{background:var(--accent);color:var(--accent-ink);box-shadow:inset 0 0 0 2px var(--accent)}
.s.v.slow{background:transparent;color:var(--accent)}
.s.j{background:var(--hi);color:var(--hi-ink);box-shadow:inset 0 0 0 2px var(--hi)}
.s.now{outline:2px solid var(--ink);outline-offset:2px}
.lctl{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}
.ib{display:grid;place-items:center;height:56px;min-width:0;border:1.5px solid var(--line);background:var(--paper);color:var(--ink);border-radius:14px;cursor:pointer;padding:0}
.ib svg{width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:2.1;stroke-linecap:round;stroke-linejoin:round}
.ib:disabled{opacity:.35;cursor:default}
.ib[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
#lpause[aria-pressed="true"]{background:var(--hi);border-color:var(--hi);color:var(--hi-ink)}
.ib:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.pw,.pwa,.pg,.pha{stroke-width:3.4;stroke-linecap:round;stroke-linejoin:round}
.pw{fill:var(--paper);stroke:var(--ink)}
.pwa{fill:var(--paper);stroke:var(--hi)}
.pg{fill:var(--fig);stroke:var(--ink)}
.pha{fill:var(--hi);stroke:var(--hi)}
.pt,.pta{fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.pt{stroke:var(--ink-soft)}
.pta{stroke:var(--hi)}
.pc{stroke:var(--ink);stroke-width:3.4}
.tx,.txa,.txi{font-family:var(--f-vi);font-weight:700}
.tx{fill:var(--ink)} .txa{fill:var(--hi)} .txi{fill:var(--hi-ink)}
/* pictogram classes */
.p,.pa{fill:none;stroke:var(--ink);stroke-width:3.4;stroke-linecap:round;stroke-linejoin:round}
.pa{stroke:var(--hi)}
.pf{fill:var(--ink)} .pfa{fill:var(--hi)}
.fig{fill:var(--fig)} .hair{fill:var(--hair)} .hl{fill:var(--hi)}
.hlf{fill:var(--hi);fill-opacity:.32;stroke:var(--hi);stroke-width:2.2}
.hls{fill:none;stroke:var(--hi);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.ln{fill:none;stroke:var(--ink-soft);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.eye,.dark{fill:var(--ink)} .teeth,.nail{fill:var(--paper)} .tongue{fill:var(--tongue)}
.org{fill:var(--paper);opacity:.8} .orgs{fill:none;stroke:var(--paper);stroke-width:2.4;stroke-linecap:round;opacity:.8}
.spine{fill:none;stroke:var(--paper);stroke-width:1.6;stroke-linecap:round;stroke-dasharray:1 3}
.tg{font-family:var(--f-ja);font-size:6.5px;font-weight:700;fill:var(--ink-soft)}
@media (prefers-reduced-motion: reduce){.inner{transition:none}.bar i{transition:none}.mic.listening{animation:none}}
@media (max-width:420px){.big{font-size:1.6rem}.card{height:356px}.pic{height:182px}}

.tab.sub{padding:4px 11px;font-size:.8rem}
.tab.grp{font-weight:700}
.opt.part{border-style:dashed}
.ldet{margin-top:8px}.ldet summary{cursor:pointer;font-size:.85rem;color:var(--ink-soft);padding:4px 0}
.sub2{margin:6px 0;align-items:center}
.big.long{font-size:1.45rem}
.face{overflow:auto;justify-content:center;justify-content:safe center}
.exs{display:flex;flex-direction:column;gap:8px;width:100%;margin-top:2px}
.ex{border-left:3px solid var(--accent);padding:2px 0 2px 10px;text-align:left}
.exv{font-family:var(--f-vi);font-weight:700;font-size:1.02rem;line-height:1.3}
.exj{font-family:var(--f-ja);font-size:.78rem;color:var(--ink-soft)}
.back.hasex .small{font-size:.9rem}
.pic.wide{width:100%}

.lockov{position:fixed;inset:0;z-index:1000;background:rgba(0,0,0,.98);color:#e9eef0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;padding:24px;text-align:center;touch-action:none;overscroll-behavior:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.lockov[hidden]{display:none}
.lockov svg.lk{width:64px;height:64px;fill:none;stroke:#e9eef0;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;opacity:.8}
.lockov .lt{font-size:1.15rem;font-weight:700}
.lockov .lc{font-family:var(--f-vi);font-size:1.1rem;opacity:.75;min-height:1.5em;max-width:90vw;overflow-wrap:anywhere}
.lockov .ls{font-size:.9rem;opacity:.6}
.unl{position:relative;overflow:hidden;margin-top:14px;width:min(78vw,300px);height:64px;border-radius:32px;border:2px solid #6c8790;background:transparent;color:#e9eef0;font:inherit;font-weight:700;touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;cursor:pointer}
.unl i{position:absolute;left:0;top:0;bottom:0;width:0;background:var(--accent);opacity:.85}
.unl.hold i{width:100%;transition:width 1.2s linear}
.unl span{position:relative}

html{-webkit-text-size-adjust:100%}
[hidden]{display:none!important}
body{padding-top:calc(22px + env(safe-area-inset-top,0px));padding-bottom:calc(48px + env(safe-area-inset-bottom,0px));-webkit-tap-highlight-color:transparent}
.card{user-select:none;-webkit-user-select:none;touch-action:manipulation;height:min(372px,50dvh);min-height:320px}
/* ===== 日本語カード additions ===== */
:root{--f-ja:'Zen Maru Gothic','Hiragino Maru Gothic ProN','Hiragino Sans','Noto Sans JP','Noto Sans CJK JP',sans-serif}
h2{font-size:1rem;margin:0}
h2 small,.h2 small{font-size:.72rem;color:var(--ink-soft);font-weight:500;margin-left:6px}
.h2{margin:6px 0 0}
.tb{display:flex;align-items:center;gap:10px}
.ibk{flex:none;width:42px;height:42px;display:grid;place-items:center;border:1.5px solid var(--line);background:var(--paper);color:var(--ink);border-radius:12px;cursor:pointer;padding:0}
.ibk:focus-visible,.tile:focus-visible,.lrow:focus-visible,.big-btn:focus-visible,.mc:focus-visible,.qo:focus-visible,.say:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.tile{display:flex;gap:14px;align-items:center;text-align:left;font:inherit;color:var(--ink);background:var(--paper);border:2px solid var(--line);border-radius:22px;padding:16px;cursor:pointer;width:100%}
.tile:hover{border-color:var(--accent)}
.tpic{flex:none;width:84px;height:84px;display:grid;place-items:center;background:var(--bg);border-radius:18px}
.tp{width:70px;height:74px}
.tbody{display:flex;flex-direction:column;gap:3px;min-width:0;flex:1}
.tt{font-size:1.35rem}.tt small{font-size:.74rem;color:var(--ink-soft);margin-left:8px;font-weight:500}
.td{font-size:.8rem;color:var(--ink-soft)}
.tn{font-size:.82rem;font-weight:700;color:var(--accent)}
.tc{font-size:.74rem;color:var(--ink-soft);font-variant-numeric:tabular-nums}
.tile .bar{margin-top:4px}
.tile.mini{padding:12px 16px;font-weight:700;font-size:.9rem;flex-direction:column;align-items:flex-start;gap:2px;border-style:dashed}
.tile.mini small{font-weight:500;color:var(--ink-soft)}
.center{justify-content:center}
.opt.wide{width:100%;padding:10px;font-size:.85rem}
.opt.on{border-color:var(--accent);color:var(--accent);font-weight:700}
.llist{display:flex;flex-direction:column;gap:8px}
.lrow{display:flex;align-items:center;gap:12px;font:inherit;color:var(--ink);text-align:left;background:var(--paper);border:1.5px solid var(--line);border-radius:16px;padding:10px 12px;cursor:pointer;width:100%}
.lrow.today{border:2px solid var(--hi)}
.ld{flex:none;width:52px;text-align:center;display:flex;flex-direction:column;line-height:1.15}
.ld b{font-size:1.05rem;font-variant-numeric:tabular-nums}.ld small{color:var(--ink-soft);font-size:.74rem}
.lb{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}
.lb b{font-size:.95rem;overflow-wrap:anywhere}.lb small{font-size:.74rem;color:var(--ink-soft)}
.lb em{font-style:normal;color:var(--hi);font-weight:700}
.chips2{display:flex;flex-wrap:wrap;gap:4px}
.chips2 i{font-style:normal;font-size:.66rem;border:1.5px solid var(--accent);color:var(--accent);border-radius:999px;padding:0 7px;font-weight:700}
.lc{flex:none;color:var(--ink-soft)}
.sch{background:var(--paper);border:2px solid var(--line);border-radius:18px;padding:6px 14px;display:flex;flex-direction:column}
.srow{display:grid;grid-template-columns:84px 1fr;gap:10px;padding:8px 0;border-bottom:1px dashed var(--line);font-size:.82rem}
.srow:last-child{border-bottom:0}
.sk{font-weight:700;display:flex;flex-direction:column}.sk small{font-weight:500;color:var(--ink-soft);font-size:.68rem}
.sv{overflow-wrap:anywhere;white-space:pre-line}
.big-btn{display:flex;align-items:center;gap:14px;font:inherit;color:var(--ink);text-align:left;background:var(--paper);border:2px solid var(--line);border-radius:18px;padding:14px 16px;cursor:pointer;width:100%}
.big-btn:hover{border-color:var(--accent)}
.big-btn .ic{width:28px;height:28px;color:var(--accent)}
.big-btn span{display:flex;flex-direction:column;gap:2px}.big-btn b{font-size:1rem}.big-btn small{font-size:.76rem;color:var(--ink-soft)}
.hw{background:var(--paper);border:2px solid var(--line);border-radius:18px;padding:12px 14px;display:flex;flex-direction:column;gap:8px}
.hwr{display:flex;gap:10px;align-items:center;font-size:.86rem}.hwr small{display:block;color:var(--ink-soft);font-size:.7rem}
.cb{flex:none;width:22px;height:22px;border:2px solid var(--line);border-radius:6px;display:grid;place-items:center;font-weight:700;color:var(--accent-ink)}
.hwr.on .cb{background:var(--accent);border-color:var(--accent)}
.grid2{display:grid;grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:8px}
.mc{border:1.5px solid var(--line);background:var(--paper);border-radius:12px;padding:6px 3px;font:inherit;color:var(--ink);cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:3px;min-width:0;position:relative}
.mc.done::after{content:"";position:absolute;top:5px;right:5px;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.mc span{font-size:.64rem;color:var(--ink-soft);overflow-wrap:anywhere;text-align:center;line-height:1.2}
.mpic{height:40px;width:100%}.mk{font-size:1.5rem;line-height:40px;height:40px}
.cpic{height:46px;width:100%}.cj{font-size:1.3rem;line-height:46px;height:46px;font-weight:700}
.cell span{font-family:var(--f-ja)}
/* slides */
.sbar{display:flex;align-items:center;gap:10px}
.stitle{flex:1;display:flex;flex-direction:column;min-width:0}.stitle b{font-size:.95rem;overflow-wrap:anywhere}.stitle small{font-size:.74rem;color:var(--ink-soft);font-variant-numeric:tabular-nums}
.slidewrap{background:var(--bg)}
.slide{position:relative;min-height:min(440px,62dvh);background:var(--paper);border:2px solid var(--line);border-radius:22px;padding:44px 16px 36px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;outline:none}
.slidewrap:fullscreen{display:flex;align-items:center;justify-content:center;padding:12px}
.slidewrap:fullscreen .slide{width:min(1100px,100%);min-height:calc(100dvh - 24px);font-size:1.5em}
.stag{position:absolute;top:12px;left:16px;font-size:.78rem;font-weight:700;color:var(--ink-soft);text-align:left;display:flex;flex-direction:column;gap:3px}
.stl{display:block;width:34px;height:3px;background:linear-gradient(90deg,var(--accent) 50%,var(--hi) 50%);border-radius:2px}
.spg{position:absolute;right:14px;bottom:10px;font-size:.7rem;color:var(--ink-soft);font-variant-numeric:tabular-nums}
.sx{width:100%;display:flex;flex-direction:column;align-items:center;gap:8px}
.kbig{font-size:min(46vw,210px);line-height:1.05;font-weight:700;color:var(--ink);font-family:var(--f-ja);cursor:pointer}
.kro{font-size:1.6rem;font-weight:700;font-family:var(--f-vi);color:var(--accent)}
.kh{font-size:.82rem;color:var(--ink-soft);max-width:34ch;text-wrap:balance}
.krow{flex-direction:row;flex-wrap:wrap;justify-content:center;gap:10px}
.kc{display:flex;flex-direction:column;align-items:center;border:2px solid var(--line);border-radius:16px;padding:8px 6px 6px;min-width:100px;cursor:pointer;flex:1 1 100px;max-width:150px}
.kc b{font-size:min(11vw,56px);line-height:1.2;font-family:var(--f-ja);white-space:nowrap}.kc small{font-family:var(--f-vi);font-weight:700;color:var(--accent);font-size:.95rem}
.slide .pic{height:min(190px,30dvh);width:100%}
.slide .pic.s2{height:96px;width:96px;flex:none}
.wja{font-size:2.1rem;font-weight:700;line-height:1.25;font-family:var(--f-ja);overflow-wrap:anywhere;text-wrap:balance}
.wja.m{font-size:1.4rem}.wja.a{color:var(--accent)}
.wvi{font-family:var(--f-vi);font-size:1.05rem;color:var(--ink-soft);text-wrap:balance}
.whv{font-size:.82rem;color:var(--hi);font-weight:700}
.nbig{font-size:min(30vw,130px);font-weight:700;line-height:1;font-family:var(--f-vi);color:var(--ink)}
.dots{width:min(70%,260px);height:auto}
.say{cursor:pointer}
.say:hover{color:var(--accent)}
.pt1{font-size:1.3rem;font-weight:700;font-family:var(--f-ja)}
.prow{display:flex;flex-direction:column;gap:6px;width:100%;margin-top:4px}
.pr{border:1.5px solid var(--line);border-radius:12px;padding:6px 10px;display:flex;flex-direction:column;gap:1px;text-align:left}
.pr .pj{font-weight:700;font-size:1.05rem;font-family:var(--f-ja)}.pr small{color:var(--ink-soft);font-size:.74rem;font-family:var(--f-vi)}
.exs{display:flex;flex-direction:column;gap:8px;width:100%;margin-top:2px}
.ex{border-left:3px solid var(--accent);padding:2px 0 2px 10px;text-align:left}
.exv{font-family:var(--f-ja);font-weight:700;font-size:1.05rem;line-height:1.3;display:block}
.exj{font-family:var(--f-vi);font-size:.78rem;color:var(--ink-soft)}
.dl{display:flex;flex-direction:column;gap:8px;width:100%}
.dline{display:flex;gap:8px;align-items:flex-start;text-align:left}
.dline i{flex:none;font-style:normal;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:.8rem;background:var(--accent);color:var(--accent-ink)}
.dline.b i{background:var(--hi);color:var(--hi-ink)}
.lgr{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:8px;width:100%}
.li{border:1.5px solid var(--line);border-radius:12px;padding:8px 6px;display:flex;flex-direction:column;gap:2px;cursor:pointer;background:var(--paper)}
.li b{font-size:1.15rem;font-family:var(--f-ja);overflow-wrap:anywhere}.li small{font-size:.72rem;color:var(--ink-soft);font-family:var(--f-vi)}
.flow .fh{font-size:1rem;color:var(--hi);font-weight:700}.flow .ft{font-size:1.7rem;font-weight:700;font-family:var(--f-ja);text-wrap:balance}.flow .fv{font-size:.9rem;color:var(--ink-soft);font-family:var(--f-vi)}
.fl{list-style:none;padding:0;margin:10px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:6px;width:100%;counter-reset:f}
.fl li{counter-increment:f;display:flex;flex-direction:column;border:1.5px solid var(--line);border-radius:12px;padding:6px 10px 6px 34px;position:relative;text-align:left}
.fl li::before{content:counter(f);position:absolute;left:8px;top:8px;width:20px;height:20px;border-radius:50%;background:var(--accent);color:var(--accent-ink);font-size:.72rem;font-weight:700;display:grid;place-items:center}
.fl b{font-size:.88rem}.fl small{font-size:.66rem;color:var(--ink-soft);font-family:var(--f-vi)}
.qa .qq{margin-top:2px}.qa2{margin-top:8px;border-top:2px dashed var(--line);padding-top:10px;width:100%}
.two{gap:20px}.tw{display:flex;align-items:center;gap:14px;text-align:left;width:100%;border:1.5px solid var(--line);border-radius:18px;padding:10px 12px}
.endb{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:8px}
.ctl2{display:flex;flex-direction:column;gap:8px}
.ctl2 .btn{width:100%}
.note{font-size:.8rem;color:var(--ink-soft);max-width:34ch;text-wrap:balance}
/* study card */
.big.xl{font-size:clamp(4rem,26vw,7.5rem);line-height:1.05}
.tagk{position:absolute;top:10px;right:12px;border:1.5px solid var(--accent);background:transparent;color:var(--accent);font:inherit;font-size:.68rem;font-weight:700;border-radius:999px;padding:1px 9px;cursor:pointer}
.banner{display:flex;flex-wrap:wrap;gap:8px;align-items:center;border:2px dashed var(--accent);border-radius:14px;padding:8px 12px;font-weight:700;font-size:.88rem}
.banner small{color:var(--ink-soft);font-weight:500}
.empty small{opacity:.8}
/* quiz */
.qcard{background:var(--paper);border:2px solid var(--line);border-radius:22px;padding:16px;display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center;min-height:210px;justify-content:center}
.qask{font-size:.82rem;color:var(--ink-soft)}.qprompt{display:flex;flex-direction:column;align-items:center;gap:6px}
.qk{font-size:5.5rem;line-height:1.1;font-weight:700;font-family:var(--f-ja)}.qk.ro{font-family:var(--f-vi);font-size:3.4rem;color:var(--accent)}
.qj{font-size:2rem;font-weight:700;font-family:var(--f-ja);text-wrap:balance}.qj.vi{font-family:var(--f-vi);font-size:1.5rem}
.qpic{height:110px;width:100%}
.qplay{width:96px;height:96px;border-radius:50%;border:0;background:var(--accent);color:var(--accent-ink);cursor:pointer;display:grid;place-items:center}
.qplay .ic{width:44px;height:44px}
.qopts{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.qo{font:inherit;color:var(--ink);background:var(--paper);border:2px solid var(--line);border-radius:14px;padding:14px 8px;font-size:.95rem;font-weight:700;cursor:pointer;overflow-wrap:anywhere;font-family:var(--f-ja);min-height:56px}
.qo.big{font-size:2rem;padding:8px}
.qo.right{border-color:var(--accent);background:var(--accent);color:var(--accent-ink)}
.qo.wrong{border-color:var(--hi);background:var(--hi);color:var(--hi-ink)}
.qo:disabled{cursor:default}
.fb{display:flex;flex-direction:column;gap:2px;border-radius:14px;padding:10px 14px;margin-bottom:8px}
.fb.good{background:color-mix(in srgb,var(--accent) 18%,transparent)}.fb.bad{background:color-mix(in srgb,var(--hi) 18%,transparent)}
.fb span{font-family:var(--f-ja);font-size:.95rem}
#qfb .btn{width:100%}
.qres{display:flex;flex-direction:column;gap:12px}
@media (max-width:420px){.wja{font-size:1.8rem}.tpic{width:68px;height:68px}.tp{width:56px;height:60px}.kc{min-width:72px}}

.sbar{flex-direction:row!important;align-items:center}
.mic svg{width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;flex:none}

/* ===== ruby (Vietnamese under Japanese) ===== */
.tl{display:inline-flex;flex-direction:column;align-items:center;line-height:1.15;text-align:center}
.tl small{font-size:.66em;font-weight:500;opacity:.82;font-family:var(--f-vi);letter-spacing:0;margin-left:0!important}
.ct{font-style:normal;font-size:.8em;opacity:.75;margin-left:4px;font-variant-numeric:tabular-nums}
.vl{display:block;font-size:.82em;color:var(--ink-soft);font-weight:500;font-family:var(--f-vi)}
h2 small{display:block!important;margin:0!important;font-family:var(--f-vi)}
.btn .tl,.opt .tl,.tab .tl{align-items:center}
.opt{line-height:1.15}
.stack{display:flex;flex-direction:column;gap:16px}
body{padding-bottom:calc(96px + env(safe-area-inset-bottom,0px))!important}
/* ===== tables ===== */
.ksec{display:flex;flex-direction:column;gap:8px}
.kgrid{display:grid;gap:6px;align-items:stretch}
.kgrid.c5{grid-template-columns:28px repeat(5,1fr)}.kgrid.c3{grid-template-columns:34px repeat(3,1fr)}
.kh0,.kh1{display:grid;place-items:center;font-family:var(--f-vi);font-size:.7rem;font-weight:700;color:var(--ink-soft)}
.kt{border:1.5px solid var(--line);background:var(--paper);color:var(--ink);border-radius:12px;padding:4px 0 3px;font:inherit;cursor:pointer;display:flex;flex-direction:column;align-items:center;min-width:0}
.kt b{font-size:1.6rem;line-height:1.25;font-family:var(--f-ja)}.kt small{font-family:var(--f-vi);font-size:.68rem;font-weight:700;color:var(--accent)}
.kt.blank{border:0;background:transparent}
.kt:hover{border-color:var(--accent)}
.ngrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.nc{border:1.5px solid var(--line);background:var(--paper);color:var(--ink);border-radius:14px;padding:8px 10px;font:inherit;cursor:pointer;display:flex;flex-direction:column;align-items:flex-start;gap:1px;text-align:left}
.nc b{font-size:1.5rem;font-variant-numeric:tabular-nums;line-height:1.1}.nc span{font-family:var(--f-ja);font-weight:700;font-size:.95rem;overflow-wrap:anywhere}
.nc em{font-style:normal;font-weight:500;font-size:.78em;color:var(--ink-soft)}.nc small{font-family:var(--f-vi);font-size:.72rem;color:var(--ink-soft)}
.nc.irr{border-color:var(--hi);border-width:2px}.nc.irr span{color:var(--hi)}
.irrk{color:var(--hi);font-weight:700}
.numin{display:flex;gap:8px}.numin input{flex:1;min-width:0;font:inherit;font-size:1.3rem;padding:10px 12px;border:2px solid var(--line);border-radius:14px;background:var(--paper);color:var(--ink)}
.numin .btn{width:64px}
.numout{display:flex;flex-direction:column;gap:2px;min-height:1px;cursor:pointer}
.numout b{font-size:1.6rem}.numout .nr{font-family:var(--f-ja);font-weight:700;font-size:1.25rem;color:var(--accent)}.numout small{font-family:var(--f-vi);color:var(--ink-soft)}
/* ===== たすけて / emergency ===== */
.sosbtn{position:fixed;right:14px;bottom:calc(14px + env(safe-area-inset-bottom,0px));z-index:900;display:flex;align-items:center;gap:8px;background:#FFD400;color:#000;border:3px solid #000;border-radius:999px;padding:7px 16px 7px 10px;box-shadow:0 4px 14px rgba(0,0,0,.35);font:inherit;font-size:1.05rem;font-weight:700;cursor:pointer}
.sosbtn .warn{width:30px;height:30px;flex:none}
.sosbtn:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
body.sos-open .sosbtn{display:none}
.sos{position:fixed;inset:0;z-index:2000;background:#000;color:#FFD400;overflow:auto;padding:0 16px calc(24px + env(safe-area-inset-bottom,0px));display:flex;flex-direction:column;gap:14px}
.sos[hidden]{display:none}
.sos .hz{flex:none;height:18px;margin:0 -16px;background:repeating-linear-gradient(-45deg,#FFD400 0 16px,#000 16px 32px)}
.sosh{display:flex;align-items:center;gap:14px}
.tref{width:76px;height:76px;flex:none}
.sost{font-size:2.2rem;font-weight:700;line-height:1.1;font-family:var(--f-ja)}.sosv{font-family:var(--f-vi);font-size:1rem;color:#FFE866}
.sosx{margin-left:auto;font:inherit;color:#FFD400;background:#000;border:2px solid #FFD400;border-radius:12px;padding:8px 12px;cursor:pointer;font-weight:700}
.sosn{margin:0;font-size:.95rem;color:#FFE866}.sosn small{display:block;font-family:var(--f-vi);opacity:.85;font-size:.82em}
.sosl{display:flex;flex-direction:column;gap:12px}
.sosb{display:flex;align-items:center;gap:12px;width:100%;border:3px solid #FFD400;background:#000;color:#FFD400;border-radius:18px;padding:12px 14px;text-align:left;font:inherit;cursor:pointer}
.spl{flex:none;width:48px;height:48px;border-radius:50%;background:#FFD400;color:#000;display:grid;place-items:center}
.spl svg{width:24px;height:24px;fill:#000}
.sbd{display:flex;flex-direction:column;gap:3px;min-width:0}
.sj{font-family:var(--f-ja);font-size:1.3rem;font-weight:700;line-height:1.35;overflow-wrap:anywhere}
.sj .pre{font-style:normal;font-size:.72em;font-weight:500;opacity:.8;margin-right:2px}
.sv{font-family:var(--f-vi);font-size:.78rem;color:#FFE866;opacity:.92}
.sosb.play{background:#FFD400;color:#000}.sosb.play .spl{background:#000}.sosb.play .spl svg{fill:#FFD400}.sosb.play .sv{color:#000}
.sosb:focus-visible,.sosx:focus-visible{outline:3px solid #fff;outline-offset:3px}

/* ===== もじクエスト / mastery ===== */
.segm{display:flex;gap:8px}.segm .opt{flex:1;padding:8px 10px}.segm.sm{flex:none}.segm.sm .opt{padding:4px 10px}
.ovh{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.grid.gj{display:grid;grid-template-columns:20px repeat(5,1fr);gap:6px}
.gh{display:grid;place-items:center;font-family:var(--f-vi);font-size:.66rem;font-weight:700;color:var(--ink-soft)}
.gc{border:1.5px solid var(--line);background:var(--paper);color:var(--ink);border-radius:12px;font:inherit;display:flex;flex-direction:column;align-items:center;padding:4px 0 3px;min-width:0;cursor:pointer;position:relative}
.gc b{font-size:1.45rem;line-height:1.25;font-family:var(--f-ja)}.gc span{font-size:.64rem;font-family:var(--f-vi);font-weight:700;color:var(--accent)}
.gc.blank{border:0;background:transparent;cursor:default}.gc.faded{opacity:.3;cursor:default}
.gc.cell[aria-current="true"]{border-color:var(--accent);border-width:2px}
.dd{display:flex;gap:3px;margin-top:2px}.dd i{width:6px;height:6px;border-radius:50%;background:var(--line)}.dd i.on{background:var(--hi)}
.lv1{background:color-mix(in srgb,var(--accent) 10%,var(--paper))!important}
.lv2{background:color-mix(in srgb,var(--accent) 24%,var(--paper))!important}
.lv3{background:color-mix(in srgb,var(--hi) 18%,var(--paper))!important;border-color:var(--hi)!important}
.gamebar{display:flex;justify-content:space-between;align-items:center;gap:10px;width:100%;font:inherit;color:var(--ink);background:linear-gradient(90deg,color-mix(in srgb,var(--hi) 16%,var(--paper)),var(--paper));border:2px solid var(--hi);border-radius:16px;padding:10px 14px;cursor:pointer;text-align:left}
.gb1{display:flex;flex-direction:column}.gb1 b{font-size:1rem}.gb1 small{font-size:.7rem;color:var(--ink-soft);font-family:var(--f-vi)}.gb2{font-size:.78rem;font-weight:700;font-variant-numeric:tabular-nums}
.tile.mini.game{border-color:var(--hi);border-style:solid}
.lockbox{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;border:2px dashed var(--line);border-radius:22px;padding:24px 16px;background:var(--paper)}
.lockbox .lk2{width:56px;height:56px;fill:none;stroke:var(--ink-soft);stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.lockbox.mini{flex-direction:row;text-align:left;padding:12px;gap:10px;flex-wrap:wrap}.lockbox.mini .lk2{width:34px;height:34px}.lockbox.mini>div{flex:1;min-width:160px;display:flex;flex-direction:column;gap:2px}.lockbox.mini .btn{padding:8px 12px;font-size:.82rem}
.mbar{display:flex;flex-direction:column;gap:4px;width:100%;text-align:left}
.mtop{display:flex;align-items:baseline;gap:6px;font-size:.88rem}.mtop small{color:var(--ink-soft);font-size:.7rem;font-family:var(--f-vi)}.mtop span{margin-left:auto;font-weight:700;font-variant-numeric:tabular-nums}.mtop em{font-style:normal;font-weight:500;color:var(--ink-soft);font-size:.78em}
.mtrack{height:12px;border-radius:6px;background:var(--line);overflow:hidden}.mtrack i{display:block;height:100%;background:var(--accent);border-radius:6px;transition:width .4s}.mtrack i.ok{background:var(--hi)}
.plr{background:var(--paper);border:2px solid var(--line);border-radius:18px;padding:12px 14px;display:flex;flex-direction:column;gap:6px}
.pl1{display:flex;justify-content:space-between;align-items:baseline}.rk{font-size:1.25rem;font-weight:700;display:flex;flex-direction:column;line-height:1.15}.rk small{font-size:.7rem;color:var(--ink-soft);font-weight:500;font-family:var(--f-vi)}.xp{font-weight:700;color:var(--hi);font-variant-numeric:tabular-nums}
.rewards{display:grid;grid-template-columns:1fr 1fr;gap:8px}.rw{border:2px dashed var(--line);border-radius:14px;padding:10px;display:flex;flex-direction:column;gap:2px;font-size:1.4rem}.rw b{font-size:.9rem}.rw small{font-size:.7rem;color:var(--ink-soft);font-family:var(--f-vi)}.rw.open{border-style:solid;border-color:var(--hi)}
.wbtn{flex:1;min-height:56px}
.combo{font-weight:700;color:var(--ink-soft)}.combo.hot{color:var(--hi);animation:pulse .9s ease-in-out infinite}
.lvrow{color:var(--hi);letter-spacing:.2em;font-size:1.1rem}
.gstats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;text-align:center}.gstats>div{background:var(--paper);border:1.5px solid var(--line);border-radius:14px;padding:8px 4px;display:flex;flex-direction:column}.gstats b{font-size:1.3rem}.gstats small{font-size:.66rem;color:var(--ink-soft)}
.unlockbox{border:3px solid var(--hi);border-radius:22px;padding:18px 14px;text-align:center;background:color-mix(in srgb,var(--hi) 14%,var(--paper));display:flex;flex-direction:column;gap:8px;align-items:center}
.unlockbox .burst{font-size:3.4rem;animation:pop .7s cubic-bezier(.3,1.6,.5,1)}
@keyframes pop{0%{transform:scale(.2) rotate(-30deg);opacity:0}100%{transform:scale(1) rotate(0);opacity:1}}
@media (prefers-reduced-motion: reduce){.unlockbox .burst,.combo.hot{animation:none}}