:root{--g:#58cc02;--gd:#46a302;--b:#1cb0f6;--bd:#1899d6;--r:#ff4b4b;--y:#ffc800;--bg:#f4f7fb;--t:#2b3a4a;--m:#6b7c8f;--card:#fff;--bd0:#e3e9f0;--sh:0 4px 16px rgba(30,60,100,.08)}
*{box-sizing:border-box}html{-webkit-tap-highlight-color:transparent}
body{margin:0;font:16px/1.5 Inter,"Segoe UI",system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--t)}
header{position:sticky;top:0;z-index:5;display:flex;justify-content:space-between;align-items:center;padding:12px max(20px,calc(50% - 300px));background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--bd0)}
h1{margin:0;font-size:22px;letter-spacing:-.3px;color:var(--gd)}
#stats{font-weight:700;background:#fff7d6;color:#9a6b00;padding:6px 14px;border-radius:999px;font-size:14px}
main{max-width:600px;margin:0 auto;padding:24px 16px 60px}
.hero{display:flex;gap:18px;align-items:center;background:linear-gradient(135deg,#e6f9d4,#d8efff);border-radius:24px;padding:20px;margin-bottom:24px;box-shadow:var(--sh)}
.hero img{width:92px;height:92px;border-radius:50%;background:#fff;flex:none;box-shadow:0 2px 10px rgba(0,0,0,.1)}
.hero h2{margin:0 0 4px;font-size:24px}.hero p{margin:0;color:var(--m)}
.unit{background:var(--card);border-radius:22px;margin-bottom:22px;overflow:hidden;box-shadow:var(--sh);border:1px solid var(--bd0)}
.banner{height:150px;background-size:cover;background-position:center;display:flex;align-items:flex-end}
.banner h2{margin:0;width:100%;color:#fff;font-size:22px;padding:34px 18px 12px;background:linear-gradient(transparent,rgba(10,20,40,.7))}
.lesson{display:flex;align-items:center;gap:14px;padding:12px 18px;border-top:1px solid var(--bd0)}.lesson:first-of-type{border-top:0}
.lesson span{font-weight:600}
button{font:inherit;font-weight:700;cursor:pointer;border:2px solid var(--bd0);border-bottom-width:4px;border-radius:14px;background:#fff;padding:12px 18px;color:var(--t);transition:transform .08s,background .15s}
button:hover:not(:disabled){background:#f3f8ff}button:active:not(:disabled){transform:translateY(2px);border-bottom-width:2px}
button.go{background:var(--g);border-color:var(--gd);color:#fff;text-transform:uppercase;letter-spacing:.6px;font-size:14px}
button.go:hover:not(:disabled){background:#61d908}button.done{background:var(--y);border-color:#d9a900;color:#5a4300}
button:disabled{opacity:.55;cursor:default}
.bar{height:16px;background:#dfe7ef;border-radius:10px;overflow:hidden;margin:6px 0 18px}.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--g),#8ee000);border-radius:10px;transition:width .35s}
.prompt{display:flex;align-items:center;gap:12px;margin-bottom:6px}
.spk{flex:none;width:52px;height:52px;padding:0;border-radius:50%;font-size:22px;background:#ddf4ff;border-color:#a8dcf5;color:var(--bd)}
.q{font-size:22px;font-weight:800;line-height:1.3}.sub{color:var(--m);font-weight:600;margin:0 0 16px}
.opts{display:grid;gap:12px}.opts button{text-align:left;font-size:18px;padding:16px 18px;border-radius:16px}
.opts button.sel{border-color:var(--b);background:#ddf4ff;color:var(--bd)}
.fb{margin-top:20px;padding:16px;border-radius:16px;font-weight:800}.ok{background:#d7ffb8;color:var(--gd)}.no{background:#ffdfe0;color:#c62828}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:12px}.ans{min-height:56px;border-bottom:2px solid #c9d3de;margin-bottom:16px;display:flex;flex-wrap:wrap;gap:8px;padding:6px 0}
.row{display:flex;justify-content:space-between;align-items:center;margin-top:22px}.big{font-size:44px;text-align:center}
.pic{display:block;width:190px;height:190px;object-fit:contain;margin:6px auto 16px;border-radius:22px;background:#fff;border:1px solid var(--bd0);box-shadow:var(--sh)}
@media(max-width:420px){.hero{flex-direction:column;text-align:center}.cols{gap:8px}}
.right{display:flex;align-items:center;gap:10px}.vl select{font:inherit;font-size:13px;font-weight:600;padding:6px 8px;border:1px solid var(--bd0);border-radius:10px;background:#fff;color:var(--t)}@media(max-width:480px){h1{font-size:18px}.vl select{max-width:120px}}
.opts button.hl{border-color:var(--b);background:#ddf4ff;box-shadow:0 0 0 3px rgba(28,176,246,.25)}
.shake{animation:sh .35s}@keyframes sh{20%{transform:translateX(-8px)}40%{transform:translateX(8px)}60%{transform:translateX(-5px)}80%{transform:translateX(5px)}}
.resume{display:flex;gap:14px;align-items:center;background:#fff;border:2px solid var(--g);border-radius:20px;padding:12px;margin-bottom:20px;box-shadow:var(--sh)}.resume img{width:64px;height:64px;border-radius:14px;object-fit:cover;flex:none}.resume div{flex:1;min-width:0}.resume span{color:var(--m);font-size:14px}
h1{cursor:pointer}

.opts.cards{grid-template-columns:1fr 1fr}.opts.cards button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;text-align:center;padding:12px 8px;font-size:17px}
.oi{width:104px;height:104px;object-fit:contain;border-radius:14px;background:#fff}
.om{width:44px;height:44px;object-fit:contain;border-radius:10px;margin-right:10px;vertical-align:middle;flex:none}
.cols .opts button{display:flex;align-items:center;justify-content:center;min-height:56px}
.opts.cards button.hl,.opts.cards button.sel{box-shadow:0 0 0 3px rgba(28,176,246,.25)}
.pulse{display:block;height:100%;width:40%;background:linear-gradient(90deg,var(--g),#8ee000);border-radius:10px;animation:pulse 1.2s ease-in-out infinite alternate}@keyframes pulse{from{margin-left:0}to{margin-left:60%}}
.soft{color:var(--m);font-weight:600;font-size:12px;margin-left:6px}.rimg{width:64px;height:64px;border-radius:14px;background-size:cover;background-position:center;flex:none}

.prow{display:flex;gap:12px;margin:6px 0 18px}
.dt{width:100%;font:inherit;font-size:20px;padding:14px 16px;border:2px solid var(--bd0);border-radius:14px;outline:none;margin:6px 0 10px;background:#fff;color:var(--t)}.dt:focus{border-color:var(--b)}
.acc{display:flex;flex-wrap:wrap;gap:6px}
.mini{padding:6px 10px;border-radius:10px;font-size:16px;border-bottom-width:3px;min-width:38px}
.vh{margin:26px 0 2px;font-size:19px}
.vocab{display:grid;gap:10px;margin-top:6px}
.vc{display:flex;align-items:center;gap:12px;background:#fff;border:1px solid var(--bd0);border-radius:16px;padding:10px 12px;box-shadow:var(--sh)}
.vi{width:56px;height:56px;object-fit:contain;border-radius:12px;flex:none}.vt{flex:1;min-width:0}
.vf{font-weight:800;font-size:17px}.ve{color:var(--m);font-size:14px}
.tw{cursor:pointer;border-bottom:2px dotted #9fb3c8;padding-bottom:1px}.tw:hover{color:var(--bd);border-bottom-color:var(--b)}
.rv{border-color:var(--y)}.rv .rimg{display:flex;align-items:center;justify-content:center;font-size:30px;background:#fff7d6}

.say{background:#fff;border:1px solid var(--bd0);border-radius:18px;padding:16px;margin:8px 0 18px;text-align:center;box-shadow:var(--sh)}.sf{font-size:24px;font-weight:800}.se{color:var(--m);margin-top:4px}
.microw{display:flex;justify-content:center;margin:6px 0 14px}
.mic{width:84px;height:84px;border-radius:50%;font-size:34px;padding:0;background:#ff4b4b;border-color:#d63a3a;color:#fff}.mic.on{animation:rec 1s infinite}.mic:disabled{opacity:.6}
@keyframes rec{50%{box-shadow:0 0 0 14px rgba(255,75,75,.2)}}
.score{display:flex;align-items:baseline;justify-content:center;gap:4px;margin:6px 0}.score b{font-size:48px}.score span{color:var(--m)}.score.good b{color:var(--gd)}.score.low b{color:#d63a3a}
.wds{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:6px 0 10px}.wd{cursor:pointer;padding:8px 12px;border-radius:12px;font-weight:800}.wd small{display:block;font-size:11px;font-weight:700;opacity:.8;text-align:center}
.wd.g{background:#d7ffb8;color:#2f7d00}.wd.y{background:#fff3c4;color:#8a6300}.wd.r{background:#ffdfe0;color:#c62828}
.sres,#sres{text-align:center}

.skills{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:8px 0 24px}
.skill{display:flex;flex-direction:column;align-items:flex-start;gap:2px;text-align:left;padding:14px;border-radius:18px;background:#fff;box-shadow:var(--sh)}
.skill .si{font-size:28px;line-height:1}.skill b{font-size:17px;margin-top:4px}.skill small{color:var(--m);font-weight:600;font-size:12px}
.row3{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.row3 button{flex:1;min-width:96px;padding:12px 10px}
.lvl{height:8px;background:#e3e9f0;border-radius:6px;overflow:hidden;max-width:220px;margin:0 auto 12px}.lvl i{display:block;height:100%;width:0;background:linear-gradient(90deg,#58cc02,#1cb0f6);transition:width .08s}
.cols button.matched{background:#d7ffb8;border-color:#58cc02;color:#2f7d00;opacity:1}

.acct{padding:6px 10px;border-radius:50%;font-size:18px;line-height:1;border-bottom-width:3px;position:relative}.acct.on::after{content:'';position:absolute;right:2px;top:2px;width:9px;height:9px;border-radius:50%;background:#58cc02;border:2px solid #fff}
.sheet{position:fixed;inset:0;background:rgba(20,35,55,.5);display:flex;align-items:flex-end;justify-content:center;z-index:50;padding:0}
.scard{position:relative;background:#fff;width:100%;max-width:520px;border-radius:24px 24px 0 0;padding:22px 18px 28px;max-height:92vh;overflow:auto;box-shadow:0 -10px 40px rgba(0,0,0,.25)}
@media(min-width:560px){.sheet{align-items:center}.scard{border-radius:24px}}
.scard h3{margin:0 0 6px;font-size:20px}.scard .x{position:absolute;right:12px;top:12px;padding:4px 10px;border-radius:50%;border-bottom-width:2px}
.wide{display:block;width:100%;margin:10px 0}.gbtn{display:flex;justify-content:center;margin:6px 0}
.code{font:800 26px/1.2 ui-monospace,Menlo,Consolas,monospace;letter-spacing:2px;text-align:center;background:#f4f7fb;border:2px dashed #9fb3c8;border-radius:16px;padding:18px 8px;margin:12px 0;user-select:all}

/* ---- game layer ---- */
.dash{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:12px}
.dc{background:#fff;border:1px solid var(--bd0);border-radius:16px;padding:10px 6px;text-align:center;box-shadow:var(--sh);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-family:inherit}
button.dc{border-bottom-width:3px;cursor:pointer}.dc small{color:var(--m);font-weight:700;font-size:11px}.big2{font-weight:800;font-size:18px}
.xpb{height:6px;width:80%;background:#e3e9f0;border-radius:4px;overflow:hidden;margin-top:3px}.xpb i{display:block;height:100%;background:linear-gradient(90deg,var(--g),#8ee000)}
.qcard{background:#fff;border:1px solid var(--bd0);border-radius:18px;padding:12px 14px;margin-bottom:14px;box-shadow:var(--sh)}.qrow{display:grid;grid-template-columns:1fr 70px auto;gap:8px;align-items:center;margin-top:8px;font-size:14px;font-weight:600}
.qrow small{color:var(--m);font-weight:700;font-size:11px;white-space:nowrap}.qb{height:8px;background:#e3e9f0;border-radius:5px;overflow:hidden}.qb i{display:block;height:100%;background:var(--b)}.qd .qb i{background:var(--g)}.qd span:first-child{color:var(--gd)}
.tools{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:16px}.tool{display:flex;flex-direction:column;align-items:center;gap:1px;padding:12px 4px;border-radius:16px;background:#fff;box-shadow:var(--sh)}
.tool span{font-size:26px;line-height:1}.tool b{font-size:14px}.tool small{color:var(--m);font-weight:600;font-size:11px}.tool.tutor{background:linear-gradient(135deg,#e6f9d4,#d8efff);border-color:#9be15d;grid-column:span 3;flex-direction:row;justify-content:center;gap:10px;padding:14px}.tool.tutor span{font-size:34px}.tool.tutor b{font-size:18px}
.mw{position:relative;display:inline-block;flex:none}.mw img{width:92px;height:92px;border-radius:50%;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.1)}.hero .mw img{width:92px;height:92px}
.acc{position:absolute;font-style:normal;pointer-events:none;line-height:1}.acc-hat,.acc-cap,.acc-crown{top:-14%;left:50%;transform:translateX(-50%);font-size:40px}.acc-glasses{top:26%;left:50%;transform:translateX(-50%);font-size:42px}.acc-flower{top:2%;right:6%;font-size:30px}
/* path map */
.path{display:flex;flex-direction:column;gap:6px;padding:16px 18px 20px;background:linear-gradient(#fff,#f7fbff)}.pn{display:flex;align-items:center;gap:14px}.nt{display:flex;flex-direction:column;line-height:1.25}.nt b{font-size:15px}.nt small{color:var(--m);font-weight:700;font-size:12px}
.node{width:62px;height:62px;border-radius:50%;padding:0;font-size:24px;font-weight:800;background:#e3e9f0;border-color:#c5d0dc;color:#6b7c8f;flex:none;border-bottom-width:6px}
.node.dn{background:var(--y);border-color:#d9a900;color:#5a4300}.node.cur{background:var(--g);border-color:var(--gd);color:#fff;animation:pulseN 1.6s infinite}.node.boss{background:#fff3c4;border-color:#e0b800}.node.boss.dn{background:var(--y)}.node:disabled{opacity:.55}.nn{display:block}
@keyframes pulseN{50%{box-shadow:0 0 0 12px rgba(88,204,2,.2)}}
/* effects */
.combo{color:#ff7a00;font-weight:800;margin-left:6px}.stars{letter-spacing:6px;font-size:46px}.note{background:#fff7d6;color:#8a6300;border-radius:14px;padding:10px 14px;margin:8px 0;font-weight:700;text-align:center}
#toasts{position:fixed;left:0;right:0;top:64px;z-index:60;display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none}.toast{background:#2b3a4a;color:#fff;border-radius:14px;padding:10px 16px;font-weight:700;font-size:14px;box-shadow:0 6px 20px rgba(0,0,0,.25);max-width:90vw;animation:tin .25s}.toast.out{opacity:0;transition:opacity .4s}@keyframes tin{from{transform:translateY(-10px);opacity:0}}
.confetti{position:fixed;inset:0;pointer-events:none;z-index:70;overflow:hidden}.confetti span{position:absolute;top:-30px;animation:fall 2.4s linear forwards}@keyframes fall{to{transform:translateY(110vh) rotate(540deg);opacity:.8}}
/* sheets */
.wl{display:grid;gap:8px;margin-top:8px}.wr{display:flex;align-items:center;gap:10px;background:#f7fbff;border-radius:14px;padding:8px 10px}.wr div{flex:1;min-width:0}.wr small{display:block;color:var(--m)}.dots{color:var(--g);letter-spacing:2px;font-size:13px}
.bg2{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.bd{background:#f4f7fb;border-radius:16px;padding:12px 6px;text-align:center;opacity:.55}.bd.on{background:#fff7d6;opacity:1}.bd span{font-size:32px;display:block}.bd small{font-weight:700;font-size:11px}
.shop{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.si2{background:#f7fbff;border-radius:16px;padding:10px 6px;display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center}.sic{font-size:32px}.si2 b{font-size:13px}.si2 small{color:var(--m);font-size:11px}.mini.on{background:var(--y);border-color:#d9a900}.gm{float:right;font-size:16px}
.lb{list-style:none;padding:0;margin:8px 0}.lb li{display:flex;justify-content:space-between;padding:10px 12px;border-radius:12px;background:#f7fbff;margin-bottom:6px;font-weight:700;counter-increment:r}.lb{counter-reset:r}.lb li::before{content:counter(r);color:var(--m);width:26px}.lb li span{flex:1}.lb li.me{background:#e8ffd0}.mine{background:#ddf4ff;border-radius:12px;padding:10px;font-weight:800;text-align:center;margin:6px 0}
/* themes */
:root[data-theme=ocean]{--g:#1cb0f6;--gd:#1899d6;--b:#2b70e4;--bd:#1f55b5;--bg:#eef5ff}:root[data-theme=sunset]{--g:#ff8a3d;--gd:#d96a1e;--b:#ec4899;--bd:#be2f79;--bg:#fff5ee}:root[data-theme=forest]{--g:#2e9e5b;--gd:#217a44;--b:#7a5a2e;--bd:#5b4220;--bg:#f2f8f3}
/* tutor */
.tt .chips{display:flex;gap:6px;overflow-x:auto;padding-bottom:6px}.chips button{white-space:nowrap;padding:8px 12px;border-radius:999px;font-size:14px}.chips button.on{background:var(--g);color:#fff;border-color:var(--gd)}
.stage{display:flex;justify-content:center;margin:6px 0}.owlw{position:relative;width:170px;height:170px;transition:transform .08s}.owlw img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:0;border-radius:24px}.owlw img.on{opacity:1}.owlw img.f-closed{transform:scale(.9)}.owlw .acc{font-size:46px}
.chat{height:34vh;min-height:190px;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding:8px 2px}.b{max-width:86%;padding:10px 14px;border-radius:18px;font-size:17px;line-height:1.35;box-shadow:var(--sh)}.tb{background:#fff;align-self:flex-start;border-bottom-left-radius:6px}.mb{background:var(--b);color:#fff;align-self:flex-end;border-bottom-right-radius:6px}
.tb .fr{font-weight:700}.tb .en{color:var(--m);margin-top:4px;font-size:15px}.bt{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}.fix{display:flex;gap:10px;align-items:center;background:#fff7d6;border-radius:16px;padding:10px 12px;align-self:flex-end;max-width:92%}.fix .stk{width:54px;height:54px;border-radius:12px;flex:none}.fix s{color:#c62828}.fix em{display:block;color:#8a6300;font-size:13px;margin-top:2px}.sysmsg{text-align:center;color:var(--m);font-size:13px;font-weight:600}
.tin{display:flex;gap:8px;align-items:center;margin-top:8px}.mic.small{width:54px;height:54px;font-size:24px;flex:none}.auto{font-size:13px;font-weight:700;color:var(--m)}

/* ================= responsive: phone, tablet, desktop ================= */
:root{--w:600px}
header{padding:calc(12px + env(safe-area-inset-top)) max(16px,calc((100% - var(--w)) / 2)) 12px}
main{max-width:var(--w);padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right));padding-bottom:calc(60px + env(safe-area-inset-bottom))}
.scard{padding-bottom:calc(28px + env(safe-area-inset-bottom))}
#app>*:not(.homegrid):not(.tt){max-width:640px;margin-left:auto;margin-right:auto}
.homegrid{display:block}.units{display:block}
@media (min-width:700px){
  :root{--w:760px}.tools{grid-template-columns:repeat(5,1fr)}.tool.tutor{grid-column:span 5}
  .skills{grid-template-columns:repeat(4,1fr)}
  .pic{width:210px;height:210px}.oi{width:118px;height:118px}.q{font-size:24px}
}
@media (min-width:960px){
  :root{--w:1180px}body{font-size:17px}
  .homegrid{display:grid;grid-template-columns:370px minmax(0,1fr);gap:28px;align-items:start}
  .hside{position:sticky;top:78px}.tools{grid-template-columns:repeat(3,1fr)}.tool.tutor{grid-column:span 3}
  .hmain .skills{grid-template-columns:repeat(4,1fr)}
  .pic{width:240px;height:240px}.oi{width:132px;height:132px}.q{font-size:26px}.opts button{font-size:19px}
  .tt{max-width:1060px;margin:0 auto;display:grid;grid-template-columns:300px minmax(0,1fr);grid-template-areas:"top top" "chips chips" "stage chat" "stage st" "stage lvl" "stage tin" "stage hints" "foot foot";column-gap:28px}
  .ttop{grid-area:top}.ttchips{grid-area:chips}.stage{grid-area:stage;align-self:start;position:sticky;top:90px}.chat{grid-area:chat;height:52vh}.tt #tt-status{grid-area:st}.ttlvl{grid-area:lvl}.ttin{grid-area:tin}.tthints{grid-area:hints}.ttfoot{grid-area:foot}
  .owlw{width:250px;height:250px}.b{font-size:18px}
}
@media (min-width:1280px){.units{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}.units .unit{margin-bottom:0}}
@media (hover:hover) and (pointer:fine){button:not(:disabled):hover{filter:brightness(1.03)}.node:not(:disabled):hover{transform:scale(1.06)}.tool:hover,.skill:hover{transform:translateY(-2px)}.tool,.skill,.node{transition:transform .12s}}
@media (pointer:coarse){button{min-height:46px}.mini{min-height:40px;min-width:44px}.tw{padding:4px 2px}}
@media (max-width:359px){h1{font-size:17px}.dash{grid-template-columns:repeat(2,1fr)}.skills{grid-template-columns:1fr}.shop,.bg2{grid-template-columns:repeat(2,1fr)}.tools{grid-template-columns:repeat(2,1fr)}.tool.tutor{grid-column:span 2}.q{font-size:20px}}
@media (max-height:520px) and (orientation:landscape){.owlw{width:110px;height:110px}.chat{height:30vh;min-height:110px}.pic{width:120px;height:120px}header{position:static}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

#app>.row,#app>.bar,#app>#ex,#app>#fb{width:100%}#app>.row{margin-left:auto!important;margin-right:auto!important}
@media (min-width:960px){.chat{height:42vh;min-height:220px}.stage{top:80px}}

/* ---- fit phones with a browser address bar / bottom bar ---- */
html,body{min-height:100vh;min-height:100dvh}
main{padding-bottom:calc(96px + env(safe-area-inset-bottom))}
#fb:not(:empty){position:sticky;bottom:calc(10px + env(safe-area-inset-bottom));z-index:8;background:var(--bg);padding:10px 0 4px;margin-top:6px;box-shadow:0 -14px 14px -8px var(--bg)}
#fb .fb{margin-top:0}#fb .row{margin-top:8px}
.sheet{height:100vh;height:100dvh}.scard{max-height:calc(100vh - 16px);max-height:calc(100dvh - 16px)}
@media (max-width:959px){
  .chat{height:calc(100vh - 470px);height:calc(100dvh - 470px);min-height:130px}
  .ttin{position:sticky;bottom:calc(6px + env(safe-area-inset-bottom));z-index:7;background:var(--bg);padding:8px 0}
  .stage .owlw{width:min(150px,22dvh);height:min(150px,22dvh)}
}
@media (max-height:640px){.pic{width:140px;height:140px}.oi{width:84px;height:84px}.opts button{padding:10px 8px}.q{font-size:20px}.hero{padding:12px}.bar{margin:2px 0 10px}}

/* ================= games ================= */
.gm{max-width:640px;margin:0 auto}.gtop{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px}.gtop b{font-size:18px}#gscore{font-weight:800;color:var(--m);min-width:64px;text-align:right;font-size:14px}
.gcards{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}@media (min-width:700px){.gcards{grid-template-columns:repeat(3,1fr)}}@media (min-width:960px){.gm{max-width:900px}.gcards{grid-template-columns:repeat(5,1fr)}}
.gcard{position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center;padding:14px 8px 12px;border-radius:22px;background:#fff;box-shadow:var(--sh)}.gcard .gi{width:96px;height:96px;object-fit:contain;border-radius:18px}.gcard b{font-size:16px}.gcard small{color:var(--m);font-weight:600;font-size:12px;line-height:1.25;min-height:30px}.gs{font-size:13px;letter-spacing:1px}.gcard.locked{opacity:.55}.gcard.locked .gi{filter:grayscale(.8)}
.gres{text-align:center}.gres .pic{margin-bottom:6px}.gowl{width:96px;height:96px;object-fit:contain;display:block;margin:0 auto 8px}
.bpic{width:150px;height:150px;margin:6px auto;background:#fff;border:1px solid var(--bd0);border-radius:22px;box-shadow:var(--sh);padding:8px;display:flex;align-items:center;justify-content:center}.bpic.big{width:200px;height:200px;animation:bobble 3s ease-in-out infinite}.bpic img,.pcell img,.mcard img.cb2{width:100%;height:100%;object-fit:contain}
/* memory */
.mgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}@media (min-width:700px){.mgrid{grid-template-columns:repeat(4,1fr)}}
.mcard{position:relative;aspect-ratio:1;padding:0;border-radius:18px;overflow:hidden;background:#fff;display:flex;align-items:center;justify-content:center;flex-direction:column;transition:transform .2s}.mcard .cb{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.mcard .mc{display:none;flex-direction:column;align-items:center;justify-content:center;width:100%;height:100%;padding:6px;font-size:16px;background:#fff;text-align:center}.mcard .mc img{width:100%;height:100%;object-fit:contain}.mcard .mc small{color:var(--m);font-weight:600;font-size:12px}
.mcard.up .mc{display:flex}.mcard.up .cb{display:none}.mcard.up{transform:rotateY(0)}.mcard.ok{border-color:var(--g);background:#d7ffb8;animation:okpulse .5s}.mcard.ok .mc{background:#e9ffd8}
@keyframes okpulse{50%{transform:scale(1.08)}}
/* bubbles */
.bmode{display:flex;gap:8px;justify-content:center;margin-bottom:8px}.bmode .mini.on{background:var(--b);color:#fff;border-color:var(--bd)}
.bstage{position:relative;height:min(50dvh,420px);min-height:300px;border-radius:22px;overflow:hidden;background:#bfe9f7 url(game-sea-bg.jpg) center/cover;background-image:url(img/game-sea-bg.jpg);box-shadow:inset 0 0 40px rgba(255,255,255,.4)}
.bub{position:absolute;width:104px;height:104px;border-radius:50%;padding:16px;background:radial-gradient(circle at 30% 28%,rgba(255,255,255,.95),rgba(255,255,255,.35) 45%,rgba(28,176,246,.28));border:3px solid rgba(255,255,255,.9);box-shadow:inset 0 0 18px rgba(255,255,255,.8),0 8px 18px rgba(20,120,180,.3);animation:bobble 3.2s ease-in-out infinite}.bub img{width:100%;height:100%;object-fit:contain;border-radius:50%}
.bub.pop{animation:popb .5s forwards}.bub.hint{box-shadow:0 0 0 6px rgba(255,200,0,.7)}@keyframes bobble{50%{transform:translateY(-14px)}}@keyframes popb{40%{transform:scale(1.25)}100%{transform:scale(1.6);opacity:0}}
.bbar{display:flex;align-items:center;gap:12px;margin-top:10px}.tbar{flex:1;height:10px;background:#e3e9f0;border-radius:6px;overflow:hidden}.tbar i{display:block;height:100%;width:0;background:var(--g)}
.shake{animation:sh .35s}
/* builder */
.bslots{display:flex;gap:6px;justify-content:center;align-items:center;margin:10px 0;flex-wrap:wrap}.slot{width:40px;height:48px;border-bottom:4px solid #9fb3c8;text-align:center;font-size:28px;font-weight:800;line-height:48px;text-transform:lowercase}.slot.on{color:var(--gd);border-color:var(--g);animation:okpulse .3s}.pre{font-size:22px;font-weight:700;color:var(--m);margin-right:6px}
.tiles{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:10px 0}.tile{width:54px;height:54px;border-radius:14px;font-size:26px;font-weight:800;padding:0;text-transform:lowercase}.tile:disabled{opacity:.25}#bld.done .bpic{animation:okpulse .6s}
/* train */
.track{background:#cfeeff url(img/game-track-bg.jpg) center/cover;border-radius:22px;padding:30px 10px 14px;overflow:hidden;margin-bottom:8px}.train{display:flex;align-items:flex-end;gap:4px;transition:transform 1.8s ease-in;flex-wrap:nowrap}.train .eng{width:84px;height:84px;object-fit:contain;flex:none}.cars{display:flex;gap:6px;flex-wrap:wrap}
.car{min-width:62px;min-height:48px;padding:6px 8px;border-radius:12px;border:3px dashed #fff;background:rgba(255,255,255,.45);font-size:17px;font-weight:800;color:var(--t)}.car.full{border:3px solid #e0b800;background:#ffe27a}
.train.go{transform:translateX(130%)}.blocks{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:10px 0}.blk{padding:12px 16px;font-size:19px;font-weight:800;border-radius:14px}
/* picture grids: echo, bingo, odd, word of the day */
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.pcell{position:relative;aspect-ratio:1;padding:8px;border-radius:18px;background:#fff;display:flex;align-items:center;justify-content:center;flex-direction:column}.pcell.lit{background:#fff3c4;border-color:#ffc800;transform:scale(1.05)}.pcell.on{background:#d7ffb8;border-color:var(--g)}.pcell.bad{background:#ffdfe0;border-color:#ff7b7b}.pcell.line{box-shadow:0 0 0 4px var(--y)}.pcell .mk{display:none;position:absolute;right:6px;top:4px;font-size:26px}.pcell.on .mk{display:block}.cap{font-weight:800;color:var(--m);margin-top:2px}
.starsrow{font-size:28px;margin-top:4px}.wod{text-align:center}.kline{line-height:1.6}.kw{padding:2px 6px;border-radius:8px;transition:background .15s}.kw.on{background:#ddf4ff;color:var(--bd)}

/* ================= exam practice ================= */
.tool.exam{grid-column:span 3;flex-direction:row;justify-content:center;gap:10px;padding:14px;background:linear-gradient(135deg,#fff3c4,#ffe0a8);border-color:#ffc800;flex-wrap:wrap;text-align:left}.tool.exam span{font-size:32px}.tool.exam b{font-size:17px}.tool.exam small{flex-basis:100%;text-align:center}
@media (min-width:700px){.tool.exam{grid-column:span 5}}@media (min-width:960px){.tool.exam{grid-column:span 3}}
.ex .lvls{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:10px 0}.lvlb{display:flex;flex-direction:column;align-items:center;gap:2px;padding:16px 8px;border-radius:20px;background:#fff;box-shadow:var(--sh)}.lvlb b{font-size:30px}.lvlb small{color:var(--m);font-weight:700}.lvlb.on{background:var(--g);border-color:var(--gd);color:#fff}.lvlb.on small{color:#fff}
.etopics{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}@media (min-width:700px){.etopics{grid-template-columns:repeat(3,1fr)}}
.etopic{display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center;padding:14px 8px;border-radius:20px;background:#fff;box-shadow:var(--sh)}.eem{font-size:34px;line-height:1}.etopic b{font-size:15px}.eparts{display:flex;flex-wrap:wrap;gap:4px;justify-content:center}.eparts i{font-style:normal;font-size:11px;font-weight:800;color:var(--m);background:#f1f5f9;border-radius:8px;padding:2px 6px}.eparts i.on{background:#e8ffd0;color:var(--gd)}
.epart{display:flex;align-items:center;gap:14px;width:100%;text-align:left;padding:14px;border-radius:18px;background:#fff;box-shadow:var(--sh);margin:10px 0}.epart>span{font-size:30px}.epart div{flex:1}.epart small{display:block;color:var(--m);font-weight:600;margin-top:2px}.epart em{font-style:normal;font-weight:800;color:var(--gd)}.epart.study{background:#f0f9ff}.epart.mock{background:linear-gradient(135deg,#e6f9d4,#d8efff);border-color:#9be15d}
.eitem{background:#fff;border:1px solid var(--bd0);border-radius:18px;padding:14px;margin:12px 0;box-shadow:var(--sh)}.eh{color:var(--m);margin-bottom:4px}.efr{font-size:18px;line-height:1.5;font-weight:600}.eenw{color:var(--m);margin-top:6px}
.eq{margin:14px 0 4px}.eqt{margin-bottom:6px}.eqen{display:block;color:var(--m);font-weight:600}.eopts{display:grid;gap:8px}.eo{text-align:left;padding:12px 14px;border-radius:14px;font-size:17px}.eo small{display:block;color:var(--m);font-weight:600;font-size:13px}.eo.sel{border-color:var(--b);background:#ddf4ff}.eo.right{border-color:var(--g);background:#d7ffb8;color:var(--gd);opacity:1}.eo.wrong{border-color:#ff7b7b;background:#ffdfe0;opacity:1}.eo:disabled{opacity:1}
.etrans{background:#f4f7fb;border-radius:12px;padding:10px;margin-top:10px}.tl{margin:4px 0}.tl b{display:inline-block;width:22px;color:var(--bd)}
.eresult{background:#fff7d6;border-radius:18px;padding:14px;text-align:center;margin:14px 0}.eresult.big{background:linear-gradient(135deg,#e6f9d4,#d8efff)}.big2{font-size:40px;font-weight:800}
.crit{display:grid;gap:10px;margin:10px 0}.cr{display:grid;grid-template-columns:1fr 90px auto;gap:6px 10px;align-items:center;font-weight:700}.cr small{grid-column:1/-1;color:var(--m);font-weight:600}.better{background:#f0f9ff;border-radius:16px;padding:12px;margin:12px 0}.better small{color:var(--m);font-weight:700}.better div{font-size:17px;margin-top:4px}

.en[hidden],.eenw[hidden],.etrans[hidden]{display:none!important}