:root{
  /* Layout: one phone-shaped stage centred on a night backdrop; HTML panels float over a canvas world.
     Deliberately single-theme: the game world sets its own colours in both host themes. */
  --ink:#1d1433;
  --night:#120d2b;
  --paper:#ffffff;
  --soft:#f1edfb;
  --muted:#6a6284;
  --sun:#ffc929;
  --sun-deep:#ff9f1c;
  --leaf:#28b05f;
  --berry:#ff4d7d;
  --grape:#6c3cf0;
  --gold:#ffd35a;
  /* --sd / --sb: phông của hệ chữ ngoài Latin (i18n.js tải khi chọn ngôn ngữ), dùng cho ký tự mà phông chính không có */
  --display:"Baloo 2",var(--sd,"Baloo 2"),"Trebuchet MS",system-ui,sans-serif;
  --body:"Be Vietnam Pro",var(--sb,"Be Vietnam Pro"),system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color-scheme:light;
}
html,body{height:100%;margin:0}
html[lang="zh"]{--sd:"Noto Sans SC";--sb:"Noto Sans SC"}
html[lang="ja"]{--sd:"Noto Sans JP";--sb:"Noto Sans JP"}
html[lang="ko"]{--sd:"Noto Sans KR";--sb:"Noto Sans KR"}
html[lang="th"]{--sd:"Noto Sans Thai";--sb:"Noto Sans Thai"}
html[lang="hi"]{--sd:"Noto Sans Devanagari";--sb:"Noto Sans Devanagari"}
html[lang="bn"]{--sd:"Baloo Da 2";--sb:"Noto Sans Bengali"}
/* tiếng Thái, Hindi, Bengali có dấu trên và dưới dòng: giãn dòng chữ to để dấu không bị cắt */
html[lang="th"] .btn,html[lang="hi"] .btn,html[lang="bn"] .btn,html[lang="th"] .mode .nm,html[lang="hi"] .mode .nm,html[lang="bn"] .mode .nm{line-height:1.25}
[hidden]{display:none!important}
body{
  background-color:var(--night);
  background-image:
    radial-gradient(circle at 50% -10%, #33246e 0%, rgba(51,36,110,0) 55%),
    radial-gradient(circle at 15% 80%, rgba(108,60,240,.25) 0%, rgba(108,60,240,0) 40%);
  color:var(--ink);
  font-family:var(--body);
  overflow:hidden;
  -webkit-tap-highlight-color:transparent;
}
#app{
  height:100%;
  box-sizing:border-box;
  display:grid;
  place-items:center;
  padding-left:max(16px, env(safe-area-inset-left, 0px));
  padding-right:max(16px, env(safe-area-inset-right, 0px));
  padding-top:max(12px, env(safe-area-inset-top, 0px));
  padding-bottom:max(12px, env(safe-area-inset-bottom, 0px));
}
#stage{
  position:relative;
  overflow:hidden;
  border-radius:22px;
  box-shadow:0 0 0 3px var(--ink), 0 0 0 7px rgba(255,255,255,.06), 0 30px 70px rgba(0,0,0,.5);
  container-type:size;
  user-select:none;
  -webkit-user-select:none;
  touch-action:none;
  background:#5ec8f2;
}
#cv{display:block;width:100%;height:100%}

button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible{outline:3px solid #fff;outline-offset:3px;box-shadow:0 0 0 6px var(--grape)}

.screen{
  position:absolute;inset:0;
  display:flex;flex-direction:column;
  overflow-y:auto;
  scrollbar-width:none;
}
.screen::-webkit-scrollbar{display:none}

/* ---------- shared pieces ---------- */
.btn{
  font-family:var(--display);font-weight:800;
  font-size:5.2cqi;line-height:1;
  letter-spacing:.02em;
  padding:3.4cqi 5cqi 2.8cqi;
  border:3px solid var(--ink);border-radius:4cqi;
  background:var(--sun);color:var(--ink);
  box-shadow:0 1.3cqi 0 var(--ink);
  transition:transform .08s ease, box-shadow .08s ease, filter .15s;
}
.btn:hover{filter:brightness(1.06)}
.btn:active{transform:translateY(1cqi);box-shadow:0 .3cqi 0 var(--ink)}
.btn.ghost{background:var(--paper)}
.btn.grape{background:var(--grape);color:#fff}
.btn.big{font-size:7.4cqi;padding:4.2cqi 6cqi 3.4cqi;border-radius:5cqi}
.pill{
  display:inline-flex;align-items:center;gap:1.6cqi;
  font-family:var(--display);font-weight:800;font-size:4.4cqi;line-height:1;
  padding:1.8cqi 3.2cqi 1.4cqi 1.8cqi;
  background:rgba(29,20,51,.72);color:#fff;
  border:2px solid rgba(255,255,255,.18);
  border-radius:99px;
  font-variant-numeric:tabular-nums;
}
.coin{
  display:inline-block;flex:none;
  width:1.05em;height:1.05em;border-radius:50%;
  background:radial-gradient(circle at 35% 30%, #fff6c4 0 18%, #ffd23f 20% 58%, #e89a12 60%);
  box-shadow:inset 0 0 0 .09em #b86f06;
  transform:translateY(-.06em);
}
.icon-btn{
  width:11cqi;height:11cqi;border-radius:3.4cqi;
  display:grid;place-items:center;
  background:rgba(29,20,51,.72);color:#fff;
  border:2px solid rgba(255,255,255,.18);
  padding:0;
}
.icon-btn svg{width:5.6cqi;height:5.6cqi}

/* ---------- menu ---------- */
#scr-menu{padding:4.5cqi 5cqi 5cqi;gap:3cqi;background:linear-gradient(180deg, rgba(18,13,43,.0) 0%, rgba(18,13,43,.0) 40%, rgba(18,13,43,.55) 100%)}
.topbar{display:flex;justify-content:space-between;align-items:center}
.logo{text-align:center;margin-top:1cqi;position:relative}
.logo h1{
  margin:0;
  font-family:var(--display);font-weight:800;
  font-size:17cqi;line-height:.9;
  color:var(--sun);
  letter-spacing:.01em;
  -webkit-text-stroke:1.4cqi var(--ink);
  paint-order:stroke fill;
  text-shadow:0 1.6cqi 0 var(--ink);
  text-wrap:balance;
}
.logo .badge{
  display:inline-block;
  margin-top:1.4cqi;
  transform:rotate(-4deg);
  font-family:var(--display);font-weight:800;font-size:5.4cqi;line-height:1;
  letter-spacing:.14em;
  padding:1.8cqi 3.6cqi 1.2cqi 4.2cqi;
  color:#fff;
  background:linear-gradient(100deg, var(--berry), var(--grape));
  border:3px solid var(--ink);border-radius:3cqi;
  box-shadow:0 1cqi 0 var(--ink);
}
#hero{display:block;width:40cqi;height:20cqi;margin:0 auto -1cqi}
.modes{display:grid;grid-template-columns:1fr 1fr;gap:2.6cqi}
.mode{
  position:relative;
  text-align:left;
  padding:0;
  border:3px solid var(--ink);border-radius:4cqi;
  background:var(--paper);
  box-shadow:0 1.1cqi 0 var(--ink);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .12s ease;
}
.mode:active{transform:translateY(.6cqi)}
.mode .sw{height:9cqi;position:relative}
.mode .sw b{
  position:absolute;left:2.6cqi;bottom:-3.4cqi;
  width:7cqi;height:7cqi;border-radius:2.2cqi;
  display:grid;place-items:center;
  background:var(--paper);border:2.5px solid var(--ink);
  font-family:var(--display);font-size:4cqi;font-weight:800;
}
.mode .tx{padding:4.4cqi 2.8cqi 2.6cqi;display:flex;flex-direction:column;gap:.8cqi;min-width:0}
.mode .nm{font-family:var(--display);font-weight:800;font-size:4.6cqi;line-height:1.05}
.mode .ds{font-size:2.9cqi;line-height:1.35;color:var(--muted)}
.mode .bs{font-size:2.7cqi;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;margin-top:.4cqi}
.mode[aria-pressed="true"]{outline:none;box-shadow:0 0 0 1.2cqi var(--sun), 0 1.1cqi 0 1.2cqi var(--ink)}
.mode[aria-pressed="true"] .sw b{background:var(--sun)}
.sw-classic{background:linear-gradient(180deg,#5ec8f2,#bfeaff 70%,#6cc04a 70%)}
.sw-adventure{background:linear-gradient(180deg,#5b3c9e,#e8738a 55%,#ffc98a 70%,#7a3f6a 70%)}
.sw-gravity{background:radial-gradient(circle at 80% 30%,#fff7d1 0 7%,transparent 8%),linear-gradient(180deg,#0b1236,#3b2f86 70%,#4b3fa0 70%)}
.sw-hyper{background:linear-gradient(180deg,#12002b,#5a0f6e 50%,#ff3d81 70%,#1a0033 70%)}
.menu-actions{display:flex;flex-direction:column;gap:3cqi;margin-top:auto}
.menu-row{display:grid;grid-template-columns:1fr auto;gap:2.6cqi}
.skin-btn{display:flex;align-items:center;justify-content:center;gap:2cqi}
.skin-btn small{font-family:var(--body);font-weight:600;font-size:3cqi;opacity:.7}
.hint{margin:0;text-align:center;color:rgba(255,255,255,.82);font-size:3cqi;line-height:1.4}
kbd{font-family:var(--body);font-weight:700;font-size:.92em;padding:.1em .45em;border-radius:.35em;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3)}

/* ---------- HUD ---------- */
#hud{position:absolute;inset:0;pointer-events:none}
.hud-top{position:absolute;left:4cqi;right:4cqi;top:4cqi;display:flex;justify-content:space-between;align-items:flex-start}
#score{
  position:absolute;left:0;right:0;top:12cqi;text-align:center;
  font-family:var(--display);font-weight:800;font-size:17cqi;line-height:1;
  color:#fff;-webkit-text-stroke:1.3cqi var(--ink);paint-order:stroke fill;
  text-shadow:0 1.3cqi 0 var(--ink);
  font-variant-numeric:tabular-nums;
}
#score.bump{animation:bump .18s ease-out}
@keyframes bump{50%{transform:scale(1.18)}}
#pauseBtn{pointer-events:auto}
#chips{position:absolute;left:4cqi;top:17cqi;display:flex;flex-direction:column;gap:1.8cqi;align-items:flex-start}
.chip{
  display:flex;align-items:center;gap:1.8cqi;
  padding:1.4cqi 2.8cqi 1.2cqi 1.6cqi;border-radius:99px;
  background:rgba(29,20,51,.75);color:#fff;
  font-family:var(--display);font-weight:700;font-size:3.4cqi;line-height:1;
  border:2px solid rgba(255,255,255,.16);
}
.chip i{width:3.6cqi;height:3.6cqi;border-radius:50%;flex:none}
.chip .bar{width:12cqi;height:1.4cqi;border-radius:99px;background:rgba(255,255,255,.2);overflow:hidden}
.chip .bar span{display:block;height:100%;background:currentColor;border-radius:inherit}
#readyHint{
  position:absolute;left:0;right:0;top:56%;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:2cqi;
  font-family:var(--display);font-weight:800;font-size:6cqi;color:#fff;
  -webkit-text-stroke:.9cqi var(--ink);paint-order:stroke fill;
  text-shadow:0 .9cqi 0 var(--ink);
}
#readyHint small{font-family:var(--body);font-weight:600;font-size:3.2cqi;-webkit-text-stroke:0;text-shadow:none;color:var(--ink);background:rgba(255,255,255,.88);padding:1.2cqi 3cqi;border-radius:99px}
.tap{width:12cqi;height:12cqi;animation:tap 1s ease-in-out infinite}
@keyframes tap{50%{transform:translateY(1.6cqi) scale(.92)}}
#trialChip{position:absolute;left:50%;bottom:calc(var(--gy, 13%) + 2cqi);transform:translateX(-50%);white-space:nowrap}

/* ---------- panels ---------- */
.overlay{background:rgba(18,13,43,.55);justify-content:center;align-items:center;padding:5cqi}
.panel{
  width:100%;box-sizing:border-box;
  background:var(--paper);border:3px solid var(--ink);border-radius:6cqi;
  box-shadow:0 1.8cqi 0 var(--ink);
  padding:6cqi 5.5cqi 5.5cqi;
  display:flex;flex-direction:column;gap:3.4cqi;
}
.panel h2{margin:0;text-align:center;font-family:var(--display);font-weight:800;font-size:9cqi;line-height:1;text-wrap:balance}
.panel .sub{margin:-1.4cqi 0 0;text-align:center;color:var(--muted);font-size:3.4cqi}
.pop{animation:pop .32s cubic-bezier(.2,1.4,.4,1)}
@keyframes pop{from{transform:translateY(8cqi) scale(.9);opacity:0}}
.result{display:grid;grid-template-columns:auto 1fr;gap:4cqi;align-items:center;background:var(--soft);border-radius:4cqi;padding:4cqi}
.medal{
  width:20cqi;height:20cqi;border-radius:50%;
  display:grid;place-items:center;
  border:3px solid var(--ink);
  font-family:var(--display);font-weight:800;font-size:3.2cqi;line-height:1.05;text-align:center;color:var(--ink);
  background:repeating-conic-gradient(from 0deg, rgba(0,0,0,.05) 0 10deg, transparent 10deg 20deg), #ddd7ea;
}
.medal.bronze{background:radial-gradient(circle at 35% 30%,#ffd9b0,#d98a4a 60%,#9c5a26)}
.medal.silver{background:radial-gradient(circle at 35% 30%,#ffffff,#c9d1dc 55%,#8692a4)}
.medal.gold{background:radial-gradient(circle at 35% 30%,#fff6c4,#ffcf3a 55%,#d08a06)}
.medal.plat{background:radial-gradient(circle at 35% 30%,#ffffff,#b9f3ff 45%,#8a7dff 100%)}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:2.4cqi}
.stat{display:flex;flex-direction:column;gap:.4cqi}
.stat span{font-size:2.9cqi;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:700}
.stat b{font-family:var(--display);font-weight:800;font-size:9cqi;line-height:1;font-variant-numeric:tabular-nums}
.stat.wide{grid-column:1/-1;flex-direction:row;align-items:center;gap:1.6cqi;font-family:var(--display);font-weight:800;font-size:4.6cqi}
.newbest{align-self:center;font-family:var(--display);font-weight:800;font-size:3.6cqi;letter-spacing:.1em;padding:1.4cqi 3cqi 1cqi;border-radius:99px;background:var(--berry);color:#fff;border:2.5px solid var(--ink);transform:rotate(-3deg)}
.note{margin:0;font-size:3.1cqi;line-height:1.45;color:var(--muted);text-align:center}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:2.6cqi}

/* ---------- shop ---------- */
#scr-shop{background:rgba(18,13,43,.6);padding:3cqi}
.shop{
  flex:1;min-height:0;
  display:flex;flex-direction:column;
  background:var(--paper);border:3px solid var(--ink);border-radius:6cqi;
  box-shadow:0 1.6cqi 0 var(--ink);
  overflow:hidden;
}
.shop-head{display:flex;align-items:center;gap:2.4cqi;padding:4cqi 4cqi 3cqi;border-bottom:3px solid var(--ink);background:var(--sun)}
.shop-head h2{margin:0;flex:1;font-family:var(--display);font-weight:800;font-size:7.4cqi;line-height:1}
.shop-head .icon-btn{background:var(--paper);color:var(--ink);border:2.5px solid var(--ink)}
.shop-body{flex:1;min-height:0;overflow-y:auto;padding:3cqi 4cqi 5cqi;display:flex;flex-direction:column;gap:2cqi}
.grp-h{display:flex;align-items:baseline;justify-content:space-between;gap:2cqi;margin-top:2.4cqi}
.grp-h h3{margin:0;font-family:var(--display);font-weight:800;font-size:5.4cqi;line-height:1}
.grp-h span{font-size:2.8cqi;color:var(--muted);text-align:right}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:2.6cqi}
.card{
  position:relative;min-width:0;
  display:flex;flex-direction:column;gap:1cqi;
  padding:2.4cqi 2.4cqi 2.6cqi;
  border:2.5px solid var(--ink);border-radius:4cqi;
  background:var(--soft);
}
.card .tag{
  position:absolute;top:2cqi;left:2cqi;z-index:1;
  font-family:var(--display);font-weight:800;font-size:2.5cqi;letter-spacing:.1em;line-height:1;
  padding:1cqi 1.8cqi .7cqi;border-radius:99px;border:2px solid var(--ink);
}
.tier-free .tag{background:#c9f5d6;color:#0f5a2c}
.tier-coin .tag{background:var(--gold);color:var(--ink)}
.tier-premium{background:linear-gradient(160deg,#2b1a63 0%,#5a2a8e 60%,#8a2f7e 100%);color:#fff}
.tier-premium .tag{background:linear-gradient(90deg,#ffe28a,#ffb347);color:#3a1d00}
.tier-premium::after{
  content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.22) 45%,transparent 60%);
  background-size:250% 100%;animation:shine 3.2s ease-in-out infinite;
}
@keyframes shine{from{background-position:120% 0}to{background-position:-120% 0}}
.card.is-using{box-shadow:0 0 0 1cqi var(--leaf)}
.pv{display:block;width:100%;height:20cqi;margin-top:2cqi}
.card .nm{font-family:var(--display);font-weight:800;font-size:4.2cqi;line-height:1.05}
.card .nt{font-size:2.7cqi;line-height:1.35;opacity:.78;min-height:2.7em}
.cbtn{
  margin-top:.8cqi;
  display:flex;align-items:center;justify-content:center;gap:1.2cqi;
  font-family:var(--display);font-weight:800;font-size:3.8cqi;line-height:1;
  padding:2cqi 2cqi 1.6cqi;border-radius:2.8cqi;
  border:2.5px solid var(--ink);background:var(--paper);color:var(--ink);
  box-shadow:0 .8cqi 0 var(--ink);
  font-variant-numeric:tabular-nums;
}
.cbtn:active{transform:translateY(.6cqi);box-shadow:0 .2cqi 0 var(--ink)}
.cbtn.buy{background:var(--gold)}
.cbtn.buy[aria-disabled="true"]{background:#e4e0ee;color:var(--muted)}
.cbtn.prem{background:linear-gradient(90deg,#ffe28a,#ffb347)}
.cbtn.using{background:var(--leaf);color:#fff;cursor:default}
.shop-foot{margin:3cqi 0 0;font-size:2.8cqi;line-height:1.5;color:var(--muted);text-align:center}

/* ---------- modal + toast ---------- */
#modal .panel{align-items:stretch}
#mCanvas{display:block;width:100%;height:34cqi;border-radius:4cqi;background:linear-gradient(160deg,#2b1a63,#5a2a8e 60%,#8a2f7e)}
.price{align-self:center;font-family:var(--display);font-weight:800;font-size:7cqi;line-height:1;color:var(--grape)}
#toast{
  position:absolute;left:50%;bottom:6cqi;transform:translate(-50%,0);
  max-width:84%;box-sizing:border-box;text-align:center;
  padding:2.4cqi 4cqi 2cqi;border-radius:99px;
  background:var(--ink);color:#fff;
  font-weight:600;font-size:3.4cqi;line-height:1.3;
  box-shadow:0 1cqi 0 rgba(0,0,0,.25);
  transition:opacity .2s, transform .2s;
  pointer-events:none;
}
#toast.off{opacity:0;transform:translate(-50%,3cqi)}

@media (prefers-reduced-motion: reduce){
  .tap,.tier-premium::after,#score.bump,.pop{animation:none}
}

/* ---------- tài khoản, số dư USD, khung nạp ---------- */
.topbar .pills,.topbar .tools{display:flex;gap:2cqi;align-items:center}
.pill.usd{background:#0f7a43;border-color:rgba(255,255,255,.25);color:#fff;padding:1.8cqi 3.2cqi 1.4cqi;cursor:pointer}
#accountBtn{position:relative}
#accountBtn .dot{position:absolute;top:1.2cqi;right:1.2cqi;width:2.4cqi;height:2.4cqi;border-radius:50%;background:var(--berry);border:2px solid var(--ink)}
.acc{gap:3cqi}
.acc .tabs{display:grid;grid-template-columns:1fr 1fr;gap:1.6cqi;background:var(--soft);padding:1.2cqi;border-radius:3.4cqi}
.acc .tabs button{font-family:var(--display);font-weight:800;font-size:4cqi;padding:2.2cqi 1cqi 1.8cqi;border:0;border-radius:2.6cqi;background:transparent;color:var(--muted)}
.acc .tabs button[aria-selected="true"]{background:var(--paper);color:var(--ink);box-shadow:0 .6cqi 0 rgba(29,20,51,.18)}
.acc form{display:flex;flex-direction:column;gap:2.6cqi}
.acc label{display:flex;flex-direction:column;gap:1cqi;font-size:3.2cqi;font-weight:600;color:var(--muted)}
.acc input{font:inherit;font-size:4.2cqi;color:var(--ink);padding:2.6cqi 3cqi;border:2.5px solid var(--ink);border-radius:3cqi;background:var(--paper);min-width:0}
.acc input:focus-visible{outline:3px solid var(--grape);outline-offset:1px}
.acc input.code{font-family:var(--display);font-weight:800;font-size:7cqi;letter-spacing:.4em;text-align:center;font-variant-numeric:tabular-nums}
.link{border:0;background:none;padding:1cqi;font-weight:700;font-size:3.3cqi;color:var(--grape);text-decoration:underline;text-underline-offset:.2em}
.acc .err{margin:0;color:#c0263f;font-size:3.3cqi;font-weight:600;text-align:center}
.acc .err:empty{display:none}
.acc .lead{margin:0;text-align:center;font-size:3.4cqi;line-height:1.45;color:var(--muted)}
.acc .who{display:flex;flex-direction:column;align-items:center;gap:1cqi}
.acc .who b{font-size:3.8cqi;word-break:break-all;text-align:center}
.badge-ok,.badge-warn{font-family:var(--display);font-weight:800;font-size:3cqi;letter-spacing:.06em;padding:1cqi 2.4cqi .7cqi;border-radius:99px;border:2px solid var(--ink)}
.badge-ok{background:#c9f5d6;color:#0f5a2c}
.badge-warn{background:#ffe3a3;color:#6a4100}
.bal{display:flex;justify-content:space-between;align-items:center;background:var(--soft);border-radius:4cqi;padding:3.4cqi 4cqi}
.bal span{font-size:3cqi;text-transform:uppercase;letter-spacing:.08em;font-weight:700;color:var(--muted)}
.bal b{font-family:var(--display);font-weight:800;font-size:9cqi;line-height:1;font-variant-numeric:tabular-nums}
.hist{display:flex;flex-direction:column;gap:1.4cqi;max-height:40cqi;overflow-y:auto;margin:0;padding:0;list-style:none}
.hist li{display:flex;justify-content:space-between;gap:2cqi;font-size:3.1cqi;padding:1.6cqi 0;border-bottom:1px solid var(--line, #e6e1f2);font-variant-numeric:tabular-nums}
.hist li em{font-style:normal;color:var(--muted)}
.hist .plus{color:#0f7a43;font-weight:700}
.hist .minus{color:var(--ink);font-weight:700}
#scr-cashier{background:rgba(18,13,43,.6);padding:3cqi}
.cashier{flex:1;min-height:0;display:flex;flex-direction:column;background:var(--paper);border:3px solid var(--ink);border-radius:6cqi;box-shadow:0 1.6cqi 0 var(--ink);overflow:hidden}
.cash-body{position:relative;flex:1;min-height:0}
#cashFrame{position:absolute;inset:0;width:100%;height:100%;border:0;background:#fff}
.cash-wait{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3cqi;background:var(--paper);padding:6cqi;text-align:center;color:var(--muted);font-size:3.6cqi}
#mBuy:disabled{opacity:.6;cursor:wait}

/* ---------- livechat hỗ trợ (khung chat của usdt-pay, tải qua /chat/chat.css) ---------- */
.chat-root{
  --accent:var(--grape);--accent-ink:#fff;--bad:var(--berry);--ok:var(--leaf);--warn:var(--sun-deep);
  --surface:#fff;--surface-2:var(--soft);--bg-2:var(--soft);--line:#e2dcf0;--line-2:#cfc6e6;
  --font:var(--body);--shadow:0 6px 0 var(--ink);
  font-family:var(--body);color:var(--ink);z-index:80;
}
/* nút tròn nổi che màn chơi: ẩn, mở bằng nút "Chat với hỗ trợ" trong game */
.chat-root:not(.is-open){display:none}
.chat-panel{border:3px solid var(--ink)}
.chat-head-text b{font-family:var(--display);font-weight:800}
.chat-root .btn{font-family:var(--display);font-weight:700}
@media (max-width:520px){.chat-root{left:8px;right:8px;bottom:8px}.chat-panel{width:auto}}
.help-row{display:flex;justify-content:center}
/* .icon-btn của game to theo khung game: trả lại cỡ gốc cho nút trong khung chat */
.chat-root .icon-btn{width:36px;height:36px;border-radius:10px;border:0;background:transparent;color:var(--ink);display:grid;place-items:center}
.chat-root .icon-btn:hover{background:var(--soft)}
.chat-root .icon-btn svg{width:20px;height:20px}

/* ---------- chọn ngôn ngữ ---------- */
.lang-btn b{font-family:var(--display);font-weight:800;font-size:3.6cqi;letter-spacing:.04em;line-height:1}
.lang-list{display:grid;grid-template-columns:1fr 1fr;gap:2cqi;max-height:60cqh;overflow-y:auto}
.lang-list button{font-family:var(--body);font-weight:600;font-size:3.8cqi;padding:2.6cqi 2cqi;border:2.5px solid var(--ink);border-radius:3cqi;background:var(--paper);color:var(--ink);text-align:center;min-width:0}
.lang-list button[aria-selected="true"]{background:var(--sun);box-shadow:0 .8cqi 0 var(--ink)}
.note.left{text-align:left}