:root{--bg:#FFF8EC;--card:#fff;--ink:#22223B;--ink2:#4A4E69;--mut:#8D8FA6;--red:#E63946;--gold:#FFB703;--org:#FF6B35;--teal:#06D6A0;--sky:#3A86FF;--pink:#FF5DA2;--vio:#8338EC;
--line:#F1E6D3;--r:20px;--sh:0 8px 24px rgba(60,40,10,.08);
--disp:ui-rounded,"SF Pro Rounded","Nunito","Varela Round","Segoe UI",system-ui,-apple-system,Roboto,sans-serif;
--zh:"PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Noto Sans SC","Microsoft YaHei","Noto Serif CJK SC",sans-serif;
--mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;color-scheme:light}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%}
body{font-family:var(--disp);background:var(--bg);color:var(--ink);overflow-x:hidden;-webkit-user-select:none;user-select:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input{font:inherit}
.zh{font-family:var(--zh)}
.hidden{display:none!important}
/* background */
.bgfx{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bgfx .grid{position:absolute;inset:0;background-image:linear-gradient(rgba(230,57,70,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(230,57,70,.06) 1px,transparent 1px);background-size:44px 44px;-webkit-mask-image:radial-gradient(ellipse at 50% 20%,#000 30%,transparent 75%);mask-image:radial-gradient(ellipse at 50% 20%,#000 30%,transparent 75%)}
.orb{position:absolute;border-radius:50%;filter:blur(50px);opacity:.45;animation:drift 18s ease-in-out infinite alternate}
.orb.o1{width:320px;height:320px;background:#FFC8DD;top:-80px;left:-60px}
.orb.o2{width:280px;height:280px;background:#FFE29A;top:30%;right:-90px;animation-delay:-6s}
.orb.o3{width:300px;height:300px;background:#A0E7E5;bottom:-100px;left:20%;animation-delay:-12s}
@keyframes drift{to{transform:translate(40px,60px) scale(1.15)}}
/* app shell */
#app{position:relative;z-index:1;max-width:720px;margin:0 auto;min-height:100%;padding:0 14px calc(92px + env(safe-area-inset-bottom))}
header.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;padding:10px 4px;padding-top:calc(10px + env(safe-area-inset-top));background:linear-gradient(var(--bg) 70%,rgba(255,248,236,0))}
.mascot{width:46px;height:46px;flex:none;transition:transform .2s}
.mascot:active{transform:scale(.9)}
.mascot.dance{animation:dance .9s ease-in-out 2}
@keyframes dance{0%,100%{transform:rotate(0)}25%{transform:rotate(-20deg) scale(1.2)}50%{transform:rotate(20deg) translateY(-8px)}75%{transform:rotate(-10deg) scale(1.1)}}
.hello{flex:1;min-width:0}
.hello b{display:block;font-size:17px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hello small{color:var(--mut);font-size:12px}
.starchip{background:#fff;border:2px solid var(--gold);border-radius:999px;padding:5px 11px;font-weight:800;font-size:15px;box-shadow:var(--sh)}
.starchip.bump{animation:bump .5s}
@keyframes bump{50%{transform:scale(1.35)}}
.iconbtn{width:40px;height:40px;border-radius:50%;background:#fff;box-shadow:var(--sh);font-size:19px;display:grid;place-items:center}
.iconbtn.on{background:var(--gold)}
nav.tabs{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(10px + env(safe-area-inset-bottom));z-index:30;display:flex;gap:4px;background:#fff;border-radius:26px;padding:6px;box-shadow:0 10px 30px rgba(60,30,10,.18);width:min(96vw,520px)}
nav.tabs button{flex:1;border-radius:20px;padding:7px 2px 6px;font-size:11px;font-weight:700;color:var(--mut);display:flex;flex-direction:column;align-items:center;gap:1px}
nav.tabs button span{font-size:22px;line-height:1.1}
nav.tabs button.on{background:linear-gradient(135deg,var(--red),var(--org));color:#fff;box-shadow:0 6px 16px rgba(230,57,70,.35)}
.view{display:none;animation:viewin .45s cubic-bezier(.2,.8,.2,1)}
.view.on{display:block}
@keyframes viewin{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
/* showreel type */
.eyebrow{font-family:var(--mono);font-size:10.5px;letter-spacing:.24em;text-transform:uppercase;color:var(--red);font-weight:700;margin:6px 0 6px}
.h1{font-size:clamp(32px,9vw,56px);line-height:1.02;font-weight:900;letter-spacing:-.02em;margin:0 0 10px}
.h2{font-size:clamp(24px,6.5vw,38px);line-height:1.08;font-weight:900;letter-spacing:-.01em;margin:0 0 10px}
.gL{background:linear-gradient(90deg,var(--red),var(--org) 40%,var(--gold) 70%,var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent;background-size:200% 100%;animation:shine 6s linear infinite}
@keyframes shine{to{background-position:-200% 0}}
.lede{color:var(--ink2);font-size:16px;line-height:1.45;margin:0 0 14px}
.factRow{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 16px}
.fact{font-family:var(--mono);font-size:11px;background:#fff;border:1.5px solid var(--line);border-radius:999px;padding:5px 10px;color:var(--ink2)}
.fact b{color:var(--red);font-size:13px}
.st{opacity:0;transform:translateY(16px);transition:opacity .5s,transform .5s cubic-bezier(.2,.8,.2,1)}
.on .st,.active .st{opacity:1;transform:none}
.st:nth-child(1){transition-delay:.05s}.st:nth-child(2){transition-delay:.13s}.st:nth-child(3){transition-delay:.21s}.st:nth-child(4){transition-delay:.29s}.st:nth-child(5){transition-delay:.37s}.st:nth-child(6){transition-delay:.45s}.st:nth-child(7){transition-delay:.53s}.st:nth-child(8){transition-delay:.61s}
/* cards & buttons */
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--sh);border:1.5px solid var(--line);padding:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:16px;padding:13px 18px;font-weight:800;font-size:16px;transition:transform .12s}
.btn:active{transform:scale(.95)}
.btn.p{background:linear-gradient(135deg,var(--red),var(--org));color:#fff;box-shadow:0 8px 20px rgba(230,57,70,.35)}
.btn.s{background:#fff;color:var(--red);border:2px solid #FFD6D9}
.btn.g{background:linear-gradient(135deg,#FFD166,var(--gold));color:#5a3a00;box-shadow:0 8px 20px rgba(255,183,3,.35)}
.btn.w{width:100%}
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.tile{border-radius:22px;padding:16px 14px;color:#fff;text-align:left;min-height:120px;position:relative;overflow:hidden;box-shadow:var(--sh);transition:transform .15s}
.tile:active{transform:scale(.96)}
.tile .em{font-size:38px;display:block;margin-bottom:6px;filter:drop-shadow(0 3px 4px rgba(0,0,0,.15))}
.tile b{font-size:17px;display:block}
.tile small{opacity:.92;font-size:12.5px;line-height:1.3;display:block;margin-top:2px}
.tile .best{position:absolute;top:10px;right:12px;font-size:12px;background:rgba(255,255,255,.25);border-radius:999px;padding:2px 8px}
.sec{margin:22px 0 10px}
/* hero */
.hero{position:relative;padding:8px 2px 4px}
.lantern{position:absolute;right:4px;top:0;font-size:44px;animation:swing 3s ease-in-out infinite;transform-origin:top center}
@keyframes swing{0%,100%{transform:rotate(-8deg)}50%{transform:rotate(8deg)}}
.wotd{display:flex;align-items:center;gap:14px}
.wotd .em{font-size:56px}
.wotd .zh{font-size:34px;font-weight:800}
.lb{display:flex;flex-direction:column;gap:6px}
.lbRow{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:14px;background:#FFF4E0}
.lbRow .n{flex:1;font-weight:800}
.lbRow .n small{display:block;font-weight:600;color:var(--mut);font-family:var(--zh)}
/* vocab */
.chips{display:flex;gap:8px;overflow-x:auto;padding:4px 2px 10px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex:none;border-radius:999px;padding:8px 13px;background:#fff;border:2px solid var(--line);font-weight:800;font-size:14px;white-space:nowrap}
.chip.on{color:#fff;border-color:transparent}
.vgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.fc{height:190px;content-visibility:auto;contain-intrinsic-size:auto 190px}
.fc .in{position:relative;width:100%;height:100%}
.fc.flipping .in{animation:flipq .34s ease-out}@keyframes flipq{0%{transform:scaleX(1)}45%{transform:scaleX(.04)}100%{transform:scaleX(1)}}
.fc .f,.fc .b{position:absolute;inset:0;border-radius:20px;background:#fff;box-shadow:var(--sh);border:2px solid var(--line);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:10px;text-align:center}
.fc .b{color:#fff;border:0;visibility:hidden}.fc.flip .b{visibility:visible}.fc.flip .f{visibility:hidden}
.fc .pic{font-size:54px;line-height:1.1}
@keyframes bob{50%{transform:translateY(-4px)}}
.fc .zh{font-size:28px;font-weight:800;margin-top:4px;line-height:1.15}
.fc .py{font-size:15px;color:var(--ink2);font-weight:700}
.fc .b .en{font-size:18px;font-weight:800;line-height:1.2}
.fc .b .zh{font-size:22px}
.fc .b .py{color:#fff;opacity:.95}
.bonus{position:absolute;top:8px;left:8px;font-size:10px;font-weight:800;background:var(--gold);color:#5a3a00;border-radius:999px;padding:2px 7px;letter-spacing:.04em}
.spk{position:absolute;top:6px;right:8px;font-size:16px;opacity:.6}
.sentence{display:flex;gap:10px;align-items:center;padding:12px;border-radius:16px;background:#fff;border:1.5px solid var(--line);margin-bottom:8px}
.sentence .zh{font-size:20px;font-weight:800}
.sentence .py{color:var(--ink2);font-size:14px}
.sentence .en{color:var(--mut);font-size:13px}
.play{flex:none;width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--sky),var(--teal));color:#fff;font-size:17px;display:grid;place-items:center;box-shadow:0 6px 14px rgba(58,134,255,.3)}
.play.ing{animation:pulse .8s infinite}
@keyframes pulse{50%{transform:scale(1.15)}}
.sounds{display:flex;flex-wrap:wrap;gap:6px}
.sounds span{background:#fff;border:1.5px solid var(--line);border-radius:10px;padding:5px 9px;font-weight:800;font-family:var(--mono)}
.tones{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.tones button{background:#fff;border-radius:16px;border:2px solid var(--line);padding:10px 4px;font-weight:800}
.tones button .zh{font-size:28px;display:block}
/* overlays */
.ov{position:fixed;inset:0;z-index:60;background:rgba(34,34,59,.55);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:flex;align-items:center;justify-content:center;padding:16px;animation:fade .3s}
@keyframes fade{from{opacity:0}}
.sheet{background:var(--bg);border-radius:28px;width:min(100%,520px);max-height:calc(100% - 20px);overflow:auto;padding:22px 18px;box-shadow:0 30px 80px rgba(0,0,0,.35);position:relative;animation:pop .45s cubic-bezier(.2,1.4,.4,1)}
@keyframes pop{from{transform:scale(.8) translateY(30px);opacity:0}}
.sheet.full{width:100%;max-width:720px;height:calc(100% - 10px);max-height:none;display:flex;flex-direction:column}
.x{position:absolute;top:12px;right:12px;width:38px;height:38px;border-radius:50%;background:#fff;font-size:18px;box-shadow:var(--sh);z-index:3}
.nameIn{width:100%;font-size:22px;padding:14px 16px;border-radius:16px;border:2.5px solid #FFD6D9;background:#fff;outline:none;font-weight:800;text-align:center}
.nameIn:focus{border-color:var(--red)}
.nameOut{text-align:center;min-height:86px;margin:12px 0}
.nameOut .zh{font-size:40px;font-weight:900;color:var(--red);letter-spacing:.05em;word-break:break-all}
.nameOut .py{font-size:17px;font-weight:700;color:var(--ink2)}
.quick{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:14px}
.quick button{background:#fff;border:2px solid var(--line);border-radius:16px;padding:8px 12px;font-weight:800;display:flex;flex-direction:column;align-items:center;min-width:90px}
.quick button small{font-family:var(--zh);color:var(--red);font-size:14px}
.reveal{text-align:center;padding:10px 0}
.reveal .big{font-size:clamp(56px,18vw,110px);font-weight:900;color:var(--red);line-height:1.05;text-shadow:0 6px 0 #FFD6D9;animation:zoomin .9s cubic-bezier(.2,1.5,.4,1) both;word-break:break-all}
@keyframes zoomin{from{transform:scale(.2) rotate(-12deg);opacity:0}}
.reveal .py{font-size:22px;font-weight:800;color:var(--ink2);animation:fade 1s .5s both}
.reveal .msg{font-size:17px;margin:10px 0 16px;animation:fade 1s .9s both}
#fx{position:fixed;inset:0;z-index:90;pointer-events:none}
/* games */
.ghead{display:flex;align-items:center;gap:10px;margin-bottom:10px;padding-right:44px}
.ghead h3{margin:0;font-size:20px;flex:1}
.bar{height:10px;border-radius:999px;background:#F1E6D3;overflow:hidden}
.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--teal),var(--sky));border-radius:999px;transition:width .4s}
.gbody{flex:1;display:flex;flex-direction:column;justify-content:center;gap:14px;min-height:0}
.prompt{text-align:center}
.prompt .pic{font-size:clamp(80px,26vw,130px);line-height:1;display:inline-block;animation:popin .5s cubic-bezier(.2,1.6,.4,1)}
@keyframes popin{from{transform:scale(.3) rotate(-15deg)}}
.prompt .zh{font-size:44px;font-weight:900}
.prompt .en{font-size:24px;font-weight:900}
.prompt .py{font-size:18px;color:var(--ink2);font-weight:700}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.opt{background:#fff;border-radius:18px;border:2.5px solid var(--line);padding:14px 8px;min-height:84px;display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:var(--sh);transition:transform .12s}
.opt:active{transform:scale(.95)}
.opt .zh{font-size:26px;font-weight:900}
.opt .py{font-size:14px;color:var(--ink2);font-weight:700}
.opt .em{font-size:48px}
.opt.ok{background:#D8FFF1;border-color:var(--teal);animation:jump .5s}
.opt.no{background:#FFE1E4;border-color:var(--red);animation:shake .45s}
@keyframes jump{40%{transform:translateY(-10px) scale(1.05)}}
@keyframes shake{20%,60%{transform:translateX(-8px)}40%,80%{transform:translateX(8px)}}
.toneOpt{font-size:30px;font-weight:900;font-family:var(--disp)}
.toneOpt svg{width:46px;height:26px;margin-top:4px}
.mgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}
.mc{aspect-ratio:1/1.05;perspective:600px}
.mc .in{position:relative;width:100%;height:100%;transition:transform .4s;transform-style:preserve-3d}
.mc.up .in,.mc.done .in{transform:rotateY(180deg)}
.mc .f,.mc .b{position:absolute;inset:0;border-radius:16px;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;font-weight:900}
.mc .f{background:linear-gradient(135deg,var(--red),var(--org));color:#FFD166;font-size:30px;box-shadow:var(--sh)}
.mc .b{background:#fff;transform:rotateY(180deg);border:2.5px solid var(--line)}
.mc .b .em{font-size:40px}.mc .b .zh{font-size:24px}.mc .b small{font-size:11px;color:var(--ink2)}
.mc.done .b{border-color:var(--teal);background:#E5FFF6}
.timer{font-family:var(--mono);font-weight:800;font-size:18px;background:#fff;border-radius:12px;padding:4px 10px}
.combo{text-align:center;font-weight:900;color:var(--org);height:22px}
.floaty{position:fixed;z-index:95;pointer-events:none;font-weight:900;font-size:26px;animation:floatup 1s forwards}
@keyframes floatup{to{transform:translateY(-70px);opacity:0}}
/* duel */
.duel{position:fixed;inset:0;z-index:70;background:var(--bg);display:grid;grid-template-rows:1fr auto 1fr}
.half{display:flex;flex-direction:column;justify-content:center;gap:10px;padding:14px}
.half.p2{transform:rotate(180deg);background:#E9FFF7}
.half.p1{background:#FFF0E8}
.half .who{display:flex;justify-content:space-between;align-items:center;font-weight:900;font-size:18px}
.half .score{font-size:30px}
.half .opts{grid-template-columns:repeat(3,1fr)}
.half .opt{min-height:70px;padding:8px 4px}
.half .opt .zh{font-size:22px}
.half.frozen{filter:grayscale(1);opacity:.55}
.mid{display:flex;align-items:center;justify-content:center;gap:16px;padding:6px;background:#fff;box-shadow:0 0 20px rgba(0,0,0,.08);position:relative}
.mid .pic{font-size:64px;line-height:1}
.mid .zh{font-size:26px;font-weight:900}
.mid .x{position:static;width:34px;height:34px}
/* talk */
.cast{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.castC{border-radius:18px;padding:10px 6px;text-align:center;color:#fff;box-shadow:var(--sh)}
.castC .em{font-size:30px}.castC b{display:block;font-size:14px}.castC .zh{font-size:16px;font-weight:800;word-break:break-all}
.castC input{width:100%;margin-top:6px;border-radius:10px;border:0;padding:6px;font-weight:700;text-align:center;font-size:13px}
.line{display:flex;gap:10px;align-items:flex-start;padding:12px;border-radius:18px;background:#fff;margin-bottom:8px;border-left:7px solid;box-shadow:var(--sh);transition:opacity .3s,transform .3s}
.line .who{font-size:11px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}
.line .zh{font-size:22px;font-weight:900;line-height:1.3}
.line .py{font-size:14.5px;color:var(--ink2);font-weight:700}
.line .en{font-size:13.5px;color:var(--mut)}
.line .t{flex:1;min-width:0}
.line .pic{font-size:30px}
.line.dim{opacity:.38}
.line.cur{transform:scale(1.02);box-shadow:0 0 0 3px var(--gold),var(--sh)}
.line.mine{background:#FFFDF3}
.hideZh .line .zh .hid,.hideZh .line:not(.peek) .zh{filter:blur(8px)}
.hidePy .line:not(.peek) .py{filter:blur(6px)}
.bw{background:#FFE9A8;border-radius:6px;padding:0 3px}
.toggles{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.tg{border-radius:999px;padding:7px 12px;background:#fff;border:2px solid var(--line);font-weight:800;font-size:13px}
.tg.on{background:var(--ink);color:#fff;border-color:var(--ink)}
/* presenter (showreel stage) */
.stage{position:fixed;inset:0;z-index:80;background:#FFF8EC;overflow:hidden;color:var(--ink)}
.stage .bgfx{position:absolute}
.stage .hud{position:absolute;font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--mut);text-transform:uppercase;z-index:2}
.chrome{position:absolute;left:0;right:0;z-index:5;display:flex;align-items:center;gap:8px;padding:10px 14px}
.chrome.top{top:0;padding-top:calc(10px + env(safe-area-inset-top))}
.chrome.bot{bottom:0;padding-bottom:calc(12px + env(safe-area-inset-bottom))}
.chrome .ttl{font-weight:900;flex:1;font-size:15px}
.chrome .ttl small{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--red);display:block}
.cbtn{height:40px;min-width:40px;padding:0 12px;border-radius:999px;background:#fff;box-shadow:var(--sh);font-weight:800;font-size:15px}
.cbtn.film{background:linear-gradient(135deg,var(--red),var(--org));color:#fff}
.cbtn.film.ing{background:var(--ink)}
.prog{flex:1;height:8px;border-radius:999px;background:rgba(0,0,0,.07);overflow:hidden}
.prog i{display:block;height:100%;width:0;border-radius:999px;transition:width .5s;background:linear-gradient(90deg,var(--sky),var(--teal),var(--gold),var(--red))}
.cnt{font-family:var(--mono);font-weight:800;font-size:13px;min-width:62px;text-align:center}
.slide{position:absolute;inset:0;padding:78px 20px 92px;display:flex;align-items:center;justify-content:center;opacity:0;transform:translateY(26px) scale(.985);filter:blur(10px);transition:opacity .55s,transform .55s cubic-bezier(.2,.8,.2,1),filter .55s;pointer-events:none}
.slide.active{opacity:1;transform:none;filter:none;pointer-events:auto}
.slide.prev{transform:translateY(-26px) scale(.985)}
.slide .inner{width:100%;max-width:980px;max-height:100%;overflow:auto;text-align:center;scrollbar-width:none}
.slide .inner::-webkit-scrollbar{display:none}
.slide .spkTag{display:inline-flex;align-items:center;gap:8px;border-radius:999px;padding:7px 16px 7px 8px;color:#fff;font-weight:900;font-size:clamp(14px,3.6vw,20px);box-shadow:0 8px 20px rgba(0,0,0,.15)}
.slide .spkTag .av{width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.3);display:grid;place-items:center;font-size:20px}
.slide .bigpic{font-size:clamp(70px,20vw,150px);line-height:1.1;margin:10px 0 4px;display:inline-block}
.slide.active .bigpic{animation:popin .7s cubic-bezier(.2,1.6,.4,1) .15s both,bob 3s ease-in-out 1s infinite}
.slide .lzh{font-size:clamp(38px,11vw,92px);font-weight:900;line-height:1.15;letter-spacing:.02em}
.slide .lpy{font-size:clamp(18px,5vw,34px);font-weight:800;color:var(--ink2);margin-top:6px}
.slide .len{font-size:clamp(16px,4.2vw,26px);color:var(--mut);margin-top:6px;font-weight:700}
.slide .lnum{font-family:var(--mono);font-size:11px;letter-spacing:.24em;color:var(--mut);margin-top:16px}
.slide.active .lzh .ch{display:inline-block;animation:charin .5s cubic-bezier(.2,1.6,.4,1) both}
@keyframes charin{from{transform:translateY(30px) scale(.5);opacity:0}}
.slide .castRow{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:18px}
.slide .castRow .castC{min-width:110px;padding:14px 10px}
.slide .castRow .castC .zh{font-size:22px}
.stage.speaking .slide.active .bigpic{animation:talkbounce .35s ease-in-out infinite}
@keyframes talkbounce{50%{transform:scale(1.08) rotate(-3deg)}}
.tapzone{position:absolute;inset:60px 0 80px;z-index:3}
/* stickers */
.stk{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.stk div{aspect-ratio:1;border-radius:18px;background:#fff;border:2px dashed var(--line);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;font-size:10.5px;font-weight:800;padding:4px;color:var(--mut);min-width:0;overflow:hidden;overflow-wrap:anywhere}
.stk div span{font-size:34px;filter:grayscale(1) brightness(1.6) opacity(.35)}
.stk div.got{border:2px solid var(--gold);background:#FFF7DC;color:var(--ink)}
.stk div.got span{filter:none;animation:bob 3s ease-in-out infinite}
/* red envelope */
.hb{width:200px;height:260px;margin:10px auto;position:relative;cursor:pointer;animation:wiggle 1.2s ease-in-out infinite}
@keyframes wiggle{0%,100%{transform:rotate(-4deg)}50%{transform:rotate(4deg) scale(1.03)}}
.hb .body{position:absolute;inset:0;border-radius:18px;background:linear-gradient(160deg,#F44D4D,#C1121F);box-shadow:0 20px 40px rgba(193,18,31,.4);display:flex;align-items:center;justify-content:center}
.hb .flap{position:absolute;left:0;right:0;top:0;height:90px;border-radius:18px 18px 50% 50%;background:#D62828;transform-origin:top;transition:transform .6s;z-index:2;box-shadow:0 4px 10px rgba(0,0,0,.2)}
.hb .seal{position:absolute;left:50%;top:62px;transform:translateX(-50%);width:62px;height:62px;border-radius:50%;background:radial-gradient(#FFE08A,#FFB703);color:#C1121F;font-family:var(--zh);font-weight:900;font-size:32px;display:grid;place-items:center;z-index:3;box-shadow:0 4px 10px rgba(0,0,0,.25)}
.hb .body .fu{font-family:var(--zh);font-size:70px;color:#FFD166;font-weight:900;margin-top:60px}
.hb.open{animation:none}
.hb.open .flap{transform:rotateX(180deg)}
.hb.open .seal{animation:fade .3s reverse forwards}
.hbPrize{text-align:center;animation:popin .6s cubic-bezier(.2,1.6,.4,1)}
.hbPrize .em{font-size:90px}
.dragon{position:fixed;z-index:96;pointer-events:none;top:30%;left:0;font-size:46px}
.dragon span{position:absolute;transition:none}
/* certificate */
canvas.cert{width:100%;border-radius:16px;box-shadow:var(--sh);background:#fff}
.toast{position:fixed;left:50%;bottom:110px;transform:translateX(-50%);z-index:99;background:var(--ink);color:#fff;border-radius:16px;padding:12px 16px;font-weight:700;box-shadow:0 10px 30px rgba(0,0,0,.3);animation:pop .4s;max-width:90vw;text-align:center}
.small{font-size:12.5px;color:var(--mut)}
.row{display:flex;gap:10px;align-items:center}
.row>*{flex:1}
@media (min-width:700px){.vgrid{grid-template-columns:repeat(4,1fr)}.tiles{grid-template-columns:repeat(3,1fr)}}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01s!important;transition-duration:.01s!important}}

/* ---------- Formal mode: clean study & quiz style ---------- */
body.formal{background:#F6F7FB}
body.formal .bgfx .orb,body.formal .lantern{display:none}
body.formal .bgfx .grid{opacity:.35}
body.formal .gL{background:none;-webkit-text-fill-color:#1D3557;color:#1D3557;animation:none}
body.formal .h1,body.formal .h2{letter-spacing:-.01em}
body.formal .tile{background:#fff!important;color:#1D3557;border:1px solid #DDE1EA;box-shadow:none}
body.formal .tile small{color:#5C677D}
body.formal .tile .em{filter:grayscale(.2)}
body.formal .card,body.formal .sentence,body.formal .fc .f,body.formal .opt{box-shadow:none;border:1px solid #DDE1EA}
body.formal .mascot.dance,body.formal .starchip.bump,body.formal .hb{animation:none}
body.formal .st,body.formal .view{animation:none!important}
body.formal .fact{background:#fff;border:1px solid #DDE1EA;color:#1D3557}
body.formal .tabs button.on{background:#1D3557;color:#fff}
body.formal .btn.p{background:#1D3557;box-shadow:none}
body.formal .chip.on{background:#1D3557!important}
body.formal .fc .b{background:#1D3557!important}
body.formal .combo,body.formal .floaty{display:none}
@media (max-width:560px){.stage .hud{display:none}.chrome.top .ttl{font-size:0;max-width:40px;overflow:hidden;white-space:nowrap}.chrome.top .ttl small{font-size:0}.chrome.top .ttl::before{content:"🐼";font-size:26px}}
.hero .eyebrow{padding-right:56px}
.bonusTg{margin:6px 0 10px;flex-wrap:wrap}
.sndWrap{position:relative;flex:none;display:flex;align-items:center}
#sndBtn.muted{background:#FFE1E1;box-shadow:0 0 0 2px #E63946 inset}
.sndCaret{position:absolute;right:-4px;bottom:-3px;width:18px;height:18px;border-radius:50%;background:var(--ink,#22223B);color:#fff;font-size:10px;line-height:18px;padding:0;display:grid;place-items:center}
.sndMenu{position:fixed;z-index:60;background:#fff;border-radius:16px;box-shadow:0 10px 30px rgba(0,0,0,.22);padding:6px;display:flex;flex-direction:column;min-width:220px}
.sndMenu button{text-align:left;padding:11px 12px;border-radius:10px;font-size:15px;font-weight:700;background:none}
.sndMenu button:hover,.sndMenu button:focus-visible{background:#FFF3DC}
.sndMenu button[data-s=all]{border-top:1px solid #eee;margin-top:4px;color:#E63946}
body.hasOv .sndWrap{position:fixed;top:calc(8px + env(safe-area-inset-top));left:8px;z-index:95}
body.hasOv .sndMenu{z-index:96}
body.hasOv .sheet .ghead{padding-left:46px}
body.hasStage .sndWrap{left:auto;right:10px;top:calc(66px + env(safe-area-inset-top))}

/* no zh-CN voice banner */
.voiceBan{display:flex;gap:10px;align-items:flex-start;margin:8px auto 0;max-width:760px;width:calc(100% - 24px);background:#FFF3B0;border:2px solid #FFB703;color:var(--ink);border-radius:16px;padding:10px 12px;font-size:14px;line-height:1.35;position:relative;z-index:5}
.voiceBan .vbI{font-size:24px}.voiceBan i{font-style:normal;color:var(--ink2);font-size:12.5px;display:block;margin-top:3px}
.voiceBan .vbX{margin-left:auto;flex:none;width:30px;height:30px;border-radius:50%;background:rgba(0,0,0,.08);font-weight:900}
.arabicMsg{font-size:15px;line-height:1.5;color:var(--ink)}
/* Present mode: calm + projector-readable */
.stage .slide .lnum{display:none}
.stage .slide .len{color:var(--ink2)}
.stage .cnt{font-size:15px;min-width:110px}
@media (min-width:900px){
 .stage .slide{padding:84px 4vw 96px}
 .stage .slide .inner{max-width:min(1500px,92vw)}
 .stage .slide .bigpic{font-size:min(15vh,11vw)}
 .stage .slide .lzh{font-size:min(14vh,8.6vw);line-height:1.1}
 .stage .slide .lpy{font-size:min(6.4vh,3.8vw)}
 .stage .slide .len{font-size:min(5.2vh,3vw)}
 .stage .slide .spkTag{font-size:min(3.6vh,26px)}
 .stage .slide .h2{font-size:min(8vh,5vw)}
 .stage .slide .eyebrow{font-size:min(2.4vh,18px)}
 .stage .slide .castRow .castC{min-width:180px;font-size:20px}.stage .slide .castRow .castC .zh{font-size:32px}
 .stage .hud{font-size:12px}
}
.stage .hud[id="hudR"]{right:64px!important}

/* mobile memory diet (iOS Safari "A problem repeatedly occurred"): no blur/backdrop filters or endless background animation on phones */
@media (max-width:700px){.ov{-webkit-backdrop-filter:none;backdrop-filter:none;background:rgba(34,34,59,.7)}.orb{animation:none;filter:blur(30px)}}
.wsec{content-visibility:auto;contain-intrinsic-size:auto 900px}

/* Grammar corner — formal theme only */
body.fun .formalOnly{display:none!important}
.gp{background:#fff;border:1.5px solid var(--line);border-radius:16px;margin-bottom:10px}
.gp>summary{list-style:none;display:flex;gap:12px;align-items:center;padding:12px 14px;cursor:pointer}
.gp>summary::-webkit-details-marker{display:none}
.gp>summary::after{content:"›";margin-left:auto;font-size:22px;color:var(--mut);transform:rotate(90deg)}
.gp[open]>summary::after{transform:rotate(-90deg)}
.gpN{flex:none;width:30px;height:30px;border-radius:50%;background:#1D3557;color:#fff;display:grid;place-items:center;font-weight:800;font-size:14px}
.gp.gpX .gpN{background:#8D99AE}
.gpT{display:flex;flex-direction:column;gap:2px;min-width:0}
.gpS{font-size:15px;color:#457B9D;font-weight:700}
.gpOk{flex:none;color:#2A9D8F;font-weight:800}
.gpB{padding:0 14px 14px}
.gpE{margin:0 0 6px;line-height:1.45}
.gpF{margin-bottom:8px}
.gpSrc{flex:none;font-size:11px;color:var(--mut);max-width:76px;text-align:right}
.gpNote{margin:6px 0;padding:8px 10px;border-radius:10px;background:#F1F4F9}
.gpQ{margin-top:10px;padding:10px;border-radius:12px;background:#F7F8FB;border:1px solid #DDE1EA}
.gpQq{font-weight:700;margin:4px 0 8px}
.gpO{display:grid;gap:8px}
.gpO .opt{padding:10px;text-align:center}
.gpO .opt .zh{font-size:20px}
.gpW{margin-top:8px}
.gpScore{margin:0 0 12px}
.gpO .opt{min-height:0}
.gpO .opt.right{background:#E3F6F1;border-color:#2A9D8F}
.gpO .opt.wrong{background:#FDECEC;border-color:#E63946}