:root{
  --bg1:#0f1024;--bg2:#1d1442;--fg:#f4f2ff;--mut:#a9a3cf;--card:#ffffff10;--card-b:#ffffff22;
  --acc:#7c5cff;--acc2:#ff4d8d;--ok:#2fd889;--bad:#ff5468;--gold:#ffc83d;--shadow:0 10px 30px #0006;
  --r:18px;
}
html.light{--bg1:#f6f3ff;--bg2:#e7ecff;--fg:#1b1640;--mut:#5f5a86;--card:#ffffffcc;--card-b:#1b164020;--shadow:0 10px 26px #2a1f6a22}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--fg);
  background:radial-gradient(1200px 600px at 10% -10%,#7c5cff33,transparent 60%),radial-gradient(900px 500px at 110% 110%,#ff4d8d2a,transparent 60%),linear-gradient(160deg,var(--bg1),var(--bg2));
  -webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;touch-action:manipulation}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:var(--acc)}
html.light a{color:#5a3ee0}
.hidden{display:none!important}
#app{height:100%;height:100dvh;display:flex;flex-direction:column;max-width:1200px;margin:0 auto;
  padding:max(8px,env(safe-area-inset-top)) max(10px,env(safe-area-inset-right)) max(8px,env(safe-area-inset-bottom)) max(10px,env(safe-area-inset-left))}
.top{display:flex;align-items:center;gap:8px;flex:0 0 auto;height:44px}
.brand{flex:1;text-align:center;font-weight:900;letter-spacing:.5px;font-size:clamp(16px,2.6vw,24px);white-space:nowrap}
.brand .b1{color:var(--ok)} .brand .b2{color:var(--bad)} .brand .or{font-size:.6em;opacity:.7;margin:0 .3em;font-style:italic}
.brand .rl{display:inline-block;margin-left:.5em;font-size:.5em;padding:.2em .5em;border-radius:6px;background:linear-gradient(90deg,var(--acc),var(--acc2));color:#fff;vertical-align:middle;letter-spacing:1.5px}
.top-r{display:flex;gap:4px}
.icon-btn{width:38px;height:38px;border-radius:12px;background:var(--card);border:1px solid var(--card-b);font-size:17px;font-weight:800;display:grid;place-items:center;transition:transform .15s}
.icon-btn:hover{transform:translateY(-2px)} .icon-btn:active{transform:scale(.92)}
.screen{flex:1 1 auto;min-height:0;display:flex;flex-direction:column}
/* menu */
.menu>*,.result>*{flex-shrink:0}
.menu,.result{margin:auto;width:min(520px,100%);display:flex;flex-direction:column;gap:12px;align-items:stretch;text-align:center;padding:8px 0;max-height:100%;overflow:auto}
.hero-cards{display:flex;justify-content:center;align-items:center;gap:14px;font-size:clamp(40px,9vh,72px)}
.hc{display:grid;place-items:center;width:1.6em;height:1.6em;border-radius:22px;background:var(--card);border:1px solid var(--card-b);box-shadow:var(--shadow);animation:bob 3s ease-in-out infinite}
.hc.b{animation-delay:-1.5s}.hc.vs{width:auto;height:auto;background:none;border:0;box-shadow:none;font-size:.4em;font-weight:900;color:var(--gold);animation:pulse 1.6s infinite}
@keyframes bob{50%{transform:translateY(-8px) rotate(-3deg)}}
@keyframes pulse{50%{transform:scale(1.15)}}
.tag{color:var(--mut);font-size:15px;margin-top:6px}.tag b{color:var(--fg)}
.big-btn{display:flex;flex-direction:column;align-items:center;gap:2px;padding:12px 16px;border-radius:16px;background:var(--card);border:1px solid var(--card-b);box-shadow:var(--shadow);transition:transform .15s,filter .15s;width:100%}
.big-btn:hover{transform:translateY(-2px);filter:brightness(1.08)}.big-btn:active{transform:scale(.97)}
.big-btn.primary{background:linear-gradient(135deg,var(--acc),var(--acc2));border:0;color:#fff}
.bb-t{font-weight:900;font-size:19px}.bb-s{font-size:13px;opacity:.8}
.menu-meta{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.pill{font-size:13px;padding:6px 12px;border-radius:99px;background:var(--card);border:1px solid var(--card-b);font-variant-numeric:tabular-nums}
.menu-links{font-size:13px;color:var(--mut)} .link{color:var(--acc);text-decoration:underline;font-size:13px}
html.light .link{color:#5a3ee0}
/* game */
.hud{display:flex;align-items:center;justify-content:space-between;gap:8px;flex:0 0 auto;padding:4px 2px}
.dots{display:flex;gap:5px;flex-wrap:wrap}
.dot{width:14px;height:14px;border-radius:5px;background:var(--card);border:1px solid var(--card-b);transition:all .3s}
.dot.cur{border-color:var(--gold);box-shadow:0 0 0 2px #ffc83d55;transform:scale(1.15)}
.dot.ok{background:var(--ok);border-color:var(--ok)}.dot.bad{background:var(--bad);border-color:var(--bad)}.dot.star{background:var(--gold);border-color:var(--gold)}
.hud-r{display:flex;gap:8px;align-items:center;font-weight:800;font-variant-numeric:tabular-nums}
.combo{color:var(--gold);font-size:15px;transition:transform .2s}.combo.pop{animation:pop .4s}
.score-lbl{font-size:15px}
@keyframes pop{40%{transform:scale(1.5)}}
.question{flex:0 0 auto;text-align:center;font-weight:900;font-size:clamp(17px,3.4vh,28px);padding:4px 6px 8px;line-height:1.15}
.question.swap{animation:qin .35s ease-out}
@keyframes qin{from{opacity:0;transform:translateY(-8px)}}
.arena{flex:1 1 auto;min-height:0;display:flex;gap:12px;align-items:stretch;position:relative}
.card{flex:1 1 0;min-width:0;min-height:0;border-radius:var(--r);background:var(--card);border:2px solid var(--card-b);box-shadow:var(--shadow);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:clamp(2px,1vh,8px);padding:10px;text-align:center;position:relative;overflow:hidden;
  transition:transform .18s,border-color .25s,background .25s,opacity .3s;backdrop-filter:blur(6px)}
.card:not([disabled]):hover{transform:translateY(-4px) scale(1.01);border-color:var(--acc)}
.card:not([disabled]):active{transform:scale(.97)}
.card[disabled]{cursor:default}
.card.enter{animation:cin .45s cubic-bezier(.2,1.4,.4,1) both}#cardB.enter{animation-delay:.06s}
@keyframes cin{from{opacity:0;transform:translateY(24px) scale(.92)}}
.c-emoji{font-size:clamp(34px,calc(9vh + 2vw),120px);line-height:1;filter:drop-shadow(0 6px 10px #0005)}
.c-name{font-weight:900;font-size:clamp(16px,calc(2.2vh + 1.2vw),40px);line-height:1.1;overflow-wrap:anywhere;max-width:100%}
.c-sub{font-size:clamp(11px,1.7vh,13px);color:var(--mut);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.c-sub:empty{display:none}
.c-val{display:flex;flex-direction:column;align-items:center;min-height:2.6em;justify-content:center}
.c-val .num{font-weight:900;font-size:clamp(22px,calc(4vh + 1.6vw),64px);font-variant-numeric:tabular-nums;letter-spacing:-.5px;line-height:1}
.c-val .unit{font-size:clamp(11px,calc(1.2vh + .4vw),18px);color:var(--mut);margin-top:2px;opacity:0;transition:opacity .3s}
.card.revealed .unit{opacity:1}
.c-src{font-size:clamp(11px,1.6vh,14px);color:var(--mut);opacity:0;transition:opacity .4s .3s;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.card.revealed .c-src{opacity:1}
.c-src a{color:inherit;text-decoration:underline}
.c-badge{position:absolute;top:8px;right:10px;font-size:13px;font-weight:900;padding:3px 9px;border-radius:99px;opacity:0;transform:scale(.5);transition:all .35s cubic-bezier(.2,1.6,.4,1)}
.card.win{border-color:var(--ok);background:linear-gradient(180deg,#2fd88926,var(--card))}
.card.win .c-badge{opacity:1;transform:scale(1);background:var(--ok);color:#06311d}
.card.picked.lose{border-color:var(--bad);background:linear-gradient(180deg,#ff546826,var(--card))}
.card.dim{opacity:.85}
.vs{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;width:50px;height:50px;border-radius:50%;display:grid;place-items:center;font-weight:900;
  background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;box-shadow:0 0 0 5px var(--bg1),var(--shadow);font-size:16px;pointer-events:none}
html.light .vs{box-shadow:0 0 0 5px var(--bg1),var(--shadow)}
.vs.ok{background:var(--ok);animation:pop .4s}.vs.bad{background:var(--bad);animation:pop .4s}
.controls{flex:0 0 auto;display:flex;align-items:center;justify-content:center;gap:12px;height:62px;padding-top:8px;flex-wrap:nowrap}
.chip{padding:10px 14px;border-radius:99px;background:var(--card);border:1px dashed var(--gold);font-weight:800;font-size:14px;color:var(--gold)}
.chip small{opacity:.8;font-weight:600}
.chip.on{background:var(--gold);color:#3a2a00;border-style:solid;animation:wob .6s infinite alternate}
.chip[disabled]{opacity:.35;cursor:default}
@keyframes wob{to{transform:rotate(-2deg) scale(1.04)}}
.verdict{font-weight:900;font-size:18px;min-width:0;text-align:center;line-height:1.15}
.verdict:empty{display:none}
.verdict .gap{display:block;font-size:13px;color:var(--mut);font-weight:600}
.next-btn{padding:12px 26px;border-radius:99px;font-weight:900;font-size:17px;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;box-shadow:var(--shadow);animation:cin .3s both}
.shake{animation:shake .45s}
@keyframes shake{20%{transform:translateX(-10px)}40%{transform:translateX(9px)}60%{transform:translateX(-6px)}80%{transform:translateX(3px)}}
/* result */
.r-title{font-weight:800;color:var(--mut);letter-spacing:1px;text-transform:uppercase;font-size:14px}
.r-score{font-weight:900;font-size:clamp(44px,12vh,84px);line-height:1;background:linear-gradient(90deg,var(--ok),var(--gold),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent}
.r-msg{font-size:16px;color:var(--mut)}
.r-grid{font-size:26px;letter-spacing:3px}
.r-btns{display:flex;gap:10px}
.r-review{display:flex;flex-direction:column;gap:6px;text-align:left;font-size:13px;flex:0 1 auto;min-height:72px;overflow:auto}
.rv{display:flex;gap:8px;align-items:center;padding:7px 10px;border-radius:12px;background:var(--card);border:1px solid var(--card-b)}
.rv b{font-variant-numeric:tabular-nums}
.rv .rv-m{flex:0 0 auto}
.rv .rv-t{flex:1;min-width:0}
/* modals */
.modal{position:fixed;inset:0;background:#0009;display:grid;place-items:center;z-index:50;padding:14px;animation:fade .2s}
@keyframes fade{from{opacity:0}}
.m-box{width:min(460px,100%);max-height:100%;overflow:auto;background:linear-gradient(160deg,var(--bg1),var(--bg2));border:1px solid var(--card-b);border-radius:20px;padding:18px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow);font-size:14px;line-height:1.45;-webkit-user-select:text;user-select:text}
.m-box h2{font-size:22px}.m-box h3{font-size:14px;color:var(--mut)} .m-box ol{padding-left:18px;display:flex;flex-direction:column;gap:6px}
.keys{color:var(--mut);font-size:12px} kbd{padding:1px 6px;border-radius:5px;border:1px solid var(--card-b);background:var(--card);font-size:11px}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;text-align:center}
.stat-row div{background:var(--card);border-radius:12px;padding:8px 2px}.stat-row b{display:block;font-size:22px}.stat-row span{font-size:11px;color:var(--mut)}
.dist{display:flex;flex-direction:column;gap:3px;font-size:12px}
.dist .dr{display:flex;align-items:center;gap:6px}.dist .dr i{display:block;height:16px;border-radius:4px;background:var(--acc);min-width:18px;color:#fff;font-style:normal;font-size:11px;text-align:right;padding-right:4px;line-height:16px}
.dist .dr.me i{background:var(--ok)}
.small{font-size:12px;color:var(--mut)}
.toast{position:fixed;left:50%;top:70px;transform:translate(-50%,-20px);background:var(--fg);color:var(--bg1);padding:10px 18px;border-radius:99px;font-weight:800;opacity:0;pointer-events:none;transition:all .25s;z-index:60}
.toast.show{opacity:1;transform:translate(-50%,0)}
#fx{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:40}
/* educational: theme + "Did you know?" */
.theme-line{margin-top:6px;font-weight:800;font-size:15px;color:var(--gold)}
.theme-tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:.5px;text-transform:uppercase;color:var(--gold);border:1px solid var(--card-b);border-radius:99px;padding:2px 8px;margin-right:8px;vertical-align:middle}
.theme-tag:empty{display:none}
.learn{flex:0 0 auto;margin-top:8px;padding:8px 12px;border-radius:14px;background:var(--card);border:1px solid var(--card-b);border-left:4px solid var(--gold);font-size:13.5px;line-height:1.35;text-align:left}
.learn .li{display:-webkit-box;-webkit-line-clamp:5;-webkit-box-orient:vertical;overflow:hidden}
.learn b{color:var(--gold)}.learn .lsrc{color:var(--mut);font-size:11.5px;white-space:nowrap}.learn .lsrc a{color:var(--mut);text-decoration:underline}.learn .lic{font-size:10.5px}
.learn.pop{animation:qin .35s ease-out}
/* leaderboard */
.lb-cta{font-size:14px}.lb-cta .big-btn{border-color:var(--gold)}
.tabs{display:flex;gap:6px}.tab{flex:1;padding:8px;border-radius:12px;background:var(--card);border:1px solid var(--card-b);font-weight:800;font-size:14px}
.tab.on{background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;border:0}
.lb-list{max-height:min(42vh,340px);overflow:auto;border-radius:12px}
.lb-rows{list-style:none;padding:0!important;gap:3px!important}
.lb-rows li{display:flex;gap:8px;align-items:center;padding:6px 10px;border-radius:10px;background:var(--card);font-size:14px}
.lb-rows li.me{outline:2px solid var(--ok)}
.lb-rows .lr{width:24px;text-align:right;color:var(--mut);font-variant-numeric:tabular-nums}.lb-rows .ln{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;font-weight:700}
.lb-rows .lv{font-variant-numeric:tabular-nums;white-space:nowrap}
.lb-me{font-size:13px}
.lb-join{display:flex;flex-direction:column;gap:6px}.lb-join .row,.rc-row{display:flex;gap:6px;flex-wrap:wrap}.lb-join details .row{margin:6px 0}
.lb-join input{flex:1 1 120px;min-width:0;padding:10px 12px;border-radius:12px;border:1px solid var(--card-b);background:var(--card);color:var(--fg);font:inherit;font-size:15px}
.lb-join .next-btn,.rc-row .next-btn{padding:8px 18px;font-size:15px;animation:none}
.lb-rec{padding:10px;border-radius:12px;border:1px dashed var(--gold);display:flex;flex-direction:column;gap:6px}
.lb-rec code{flex:1;font-size:18px;font-weight:800;letter-spacing:1px;user-select:all;color:var(--gold);align-self:center}
.bad{color:var(--bad)!important}
/* portrait phones: stack cards */
@media (orientation:portrait) and (max-width:820px){
  .arena{flex-direction:column;gap:10px}
  .card{flex-direction:row;flex-wrap:wrap;justify-content:center;align-content:center;column-gap:12px}
  .c-emoji{font-size:clamp(34px,8vh,64px)}
  .c-name{flex:1 1 55%;text-align:left}
  .c-sub,.c-val,.c-src{flex:1 1 100%}
  .c-sub{text-align:center}
  .vs{width:44px;height:44px;font-size:14px}
}
/* short landscape (e.g. 800x450 iframes, phones sideways) */
@media (max-height:520px){
  .top{height:36px}.icon-btn{width:32px;height:32px;font-size:15px;border-radius:10px}
  .question{padding:2px 4px 4px}
  .controls{height:48px;padding-top:4px}.verdict{font-size:15px}.verdict .gap{font-size:12px}
  .next-btn{padding:8px 20px;font-size:15px}.chip{padding:7px 12px;font-size:13px}
  .card{padding:6px}
  .menu,.result{gap:8px}.hero-cards{font-size:34px}.tag{margin-top:2px;font-size:14px}
  .big-btn{padding:8px 12px}.bb-t{font-size:16px}
  .r-btns{flex-direction:row}
  .r-review{display:none}
  .learn{margin-top:4px;padding:4px 10px;font-size:12px;line-height:1.3}.learn .li{-webkit-line-clamp:2}.theme-tag{display:none}.theme-line{margin-top:2px;font-size:13px}
  .lb-cta .big-btn{padding:5px 10px}.lb-cta .bb-s{display:none}.lb-cta .bb-t{font-size:14px}.r-grid{font-size:22px}
}
@media (max-width:420px){.brand .rl{display:none}.icon-btn{width:34px;height:34px}.top-r{gap:3px}}
@media (prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}
.lb-rows li.me{outline-offset:-2px}
html.light .lb-rec code,html.light .learn b,html.light .theme-line,html.light .theme-tag{color:#9a5a00}