:root{--accent: #2f6bff;--accent-soft: rgba(47, 107, 255, .18);--success: #54c202;--success-ledge: #388c00;--correct: #28c76f;--wrong: #ff453a;--bg: #f2f2f7;--bg-glow: rgba(47, 107, 255, .16);--surface: rgba(255, 255, 255, .72);--surface-2: rgba(120, 130, 150, .1);--text: #11131a;--text-secondary: #6b7280;--hairline: rgba(0, 0, 0, .1);--glass-border: rgba(255, 255, 255, .6);--glass-shadow: rgba(0, 0, 0, .08);--r-button: 20px;--r-card: 24px;--r-pill: 100px;--s-xs: 6px;--s-s: 12px;--s-m: 16px;--s-l: 24px;--s-xl: 32px;--font: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Nunito", sans-serif;color-scheme:light dark}@media(prefers-color-scheme:dark){:root:not([data-theme]){--bg: #0b0d12;--bg-glow: rgba(47, 107, 255, .22);--surface: rgba(30, 36, 48, .66);--surface-2: rgba(255, 255, 255, .08);--text: #f2f4f8;--text-secondary: #9aa3b2;--hairline: rgba(255, 255, 255, .12);--glass-border: rgba(255, 255, 255, .12);--glass-shadow: rgba(0, 0, 0, .4)}}:root[data-theme=dark]{--bg: #0b0d12;--bg-glow: rgba(47, 107, 255, .22);--surface: rgba(30, 36, 48, .66);--surface-2: rgba(255, 255, 255, .08);--text: #f2f4f8;--text-secondary: #9aa3b2;--hairline: rgba(255, 255, 255, .12);--glass-border: rgba(255, 255, 255, .12);--glass-shadow: rgba(0, 0, 0, .4)}:root[data-theme=light]{--bg: #f2f2f7;--bg-glow: rgba(47, 107, 255, .16);--surface: rgba(255, 255, 255, .72);--surface-2: rgba(120, 130, 150, .1);--text: #11131a;--text-secondary: #6b7280;--hairline: rgba(0, 0, 0, .1);--glass-border: rgba(255, 255, 255, .6);--glass-shadow: rgba(0, 0, 0, .08)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}#root>main{min-height:100%;display:flex;flex-direction:column}#root>main>.screen{flex:1}body{background:radial-gradient(900px 480px at 50% -10%,var(--bg-glow) 0%,transparent 70%),var(--bg);background-attachment:fixed;color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;font-weight:500}.screen{max-width:560px;margin:0 auto;min-height:100%;padding:var(--s-l) var(--s-m) calc(var(--s-l) + env(safe-area-inset-bottom));display:flex;flex-direction:column;gap:var(--s-m)}.center{align-items:center;justify-content:center;text-align:center;gap:var(--s-l)}.center>.stack,.center>.puffy,.center>.btn{max-width:420px}@media(min-width:768px){.screen{max-width:720px;padding:var(--s-xl) var(--s-l)}}.spacer{flex:0 1 var(--s-l)}h1{font-size:30px;font-weight:800;margin:0;letter-spacing:-.02em}.hero{display:flex;flex-direction:column;gap:var(--s-m);margin-top:var(--s-s)}.hero-title{font-size:44px;font-weight:800;line-height:1.05;letter-spacing:-.035em;margin:0;background:linear-gradient(120deg,var(--text) 30%,var(--accent) 130%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero-sub{color:var(--text-secondary);font-size:17px;line-height:1.45;margin:0;max-width:32ch}@media(min-width:600px){.hero-title{font-size:60px}.hero-sub{font-size:19px}}.vs{display:flex;align-items:center;justify-content:center;gap:var(--s-m);padding:var(--s-s) 0}.vs-side{display:flex;flex-direction:column;align-items:center;gap:6px}.vs .avatar{width:72px;height:72px;font-size:38px;box-shadow:0 0 0 3px var(--accent-soft),0 8px 24px #00000040}.vs-label{font-size:13px;font-weight:700;color:var(--text-secondary)}.vs-bolt{font-size:15px;font-weight:800;letter-spacing:.5px;color:var(--accent);white-space:nowrap;filter:drop-shadow(0 0 10px var(--accent-soft))}.qpreview{padding:var(--s-m)}.qp-q{font-size:17px;font-weight:700;margin-bottom:var(--s-s)}.qp-opts{display:grid;grid-template-columns:1fr 1fr;gap:var(--s-s)}.qp-opt{padding:12px;border-radius:var(--r-button);border:1px solid var(--hairline);background:var(--surface-2);font-size:15px;font-weight:600;text-align:center}.qp-opt.right{border-color:var(--correct);color:var(--correct);background:#28c76f26;border-width:2px;padding:11px}h2{font-size:22px;font-weight:700;margin:0}.muted{color:var(--text-secondary);margin:0}.caption{color:var(--text-secondary);font-size:13px}.topic{color:var(--accent);font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.08em}.card{background:var(--surface);-webkit-backdrop-filter:blur(20px) saturate(150%);backdrop-filter:blur(20px) saturate(150%);border:1px solid var(--glass-border);border-radius:var(--r-card);box-shadow:0 6px 16px var(--glass-shadow);padding:var(--s-m)}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;border-radius:var(--r-button);padding:16px 18px;font-family:var(--font);font-size:17px;font-weight:700;color:#fff;background:var(--accent);cursor:pointer;width:100%;display:inline-flex;align-items:center;justify-content:center;gap:var(--s-s);box-shadow:0 6px 12px var(--accent-soft);transition:transform .08s ease,opacity .15s ease,box-shadow .15s ease}.btn:active{transform:translateY(1px) scale(.98)}.btn:disabled{opacity:.5;cursor:default}.btn.secondary{background:var(--surface-2);color:var(--text);box-shadow:none;border:1px solid var(--hairline)}.puffy{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;position:relative;width:100%;border-radius:var(--r-button);padding:16px 18px;margin-bottom:6px;font-family:var(--font);font-size:18px;font-weight:800;color:#fff;cursor:pointer;background:var(--success);box-shadow:0 6px 0 0 var(--success-ledge),0 12px 14px #388c0059;display:inline-flex;align-items:center;justify-content:center;gap:var(--s-s);transition:transform .06s ease,box-shadow .06s ease}.puffy:active{transform:translateY(6px);box-shadow:0 0 0 0 var(--success-ledge)}.puffy:disabled{opacity:.6;cursor:default}.puffy.accent{background:var(--accent);box-shadow:0 6px #1d49c4,0 12px 14px var(--accent-soft)}.puffy.accent:active{box-shadow:0 0 #1d49c4}.linklike{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:none;border:none;color:var(--text-secondary);font-family:var(--font);font-size:14px;text-decoration:underline;cursor:pointer;padding:6px}.linklike:hover{color:var(--text)}.stack{display:flex;flex-direction:column;gap:var(--s-s);width:100%}.avatar{display:inline-flex;align-items:center;justify-content:center;border-radius:50%;background:var(--surface-2);border:3px solid var(--accent);width:56px;height:56px;font-size:30px;flex:none}.avatar.lg{width:88px;height:88px;font-size:48px}.avatar.sm{width:48px;height:48px;font-size:26px}.avatar.win{border-color:var(--success)}.avatar.lose{border-color:var(--wrong)}.avatar.pending{border-style:dashed;border-color:var(--text-secondary);opacity:.7;animation:breathe 2.4s ease-in-out infinite}@keyframes breathe{0%,to{transform:scale(1);opacity:.6}50%{transform:scale(1.05);opacity:.85}}.pill{display:inline-flex;align-items:center;gap:var(--s-xs);padding:8px var(--s-m);border-radius:var(--r-pill);background:var(--surface);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--glass-border);font-size:15px;font-weight:700}.pill .ic{font-size:15px}.chips{display:flex;gap:var(--s-s);flex-wrap:wrap}.chip{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;cursor:pointer;font-family:var(--font);display:inline-flex;align-items:center;gap:6px;padding:8px var(--s-m);border-radius:var(--r-pill);font-size:14px;font-weight:600;color:var(--text-secondary);background:var(--surface-2)}.chip.active{color:#fff;background:var(--accent)}.chip .badge{font-size:12px;padding:1px 7px;border-radius:var(--r-pill);background:var(--accent-soft)}.chip.active .badge{background:#ffffff40}.home-header{display:flex;align-items:center;justify-content:space-between}.home-header .sub{margin-top:2px}.profile{display:flex;align-items:center;gap:var(--s-s);cursor:pointer}.profile .name-row{display:flex;align-items:center;gap:6px}.profile .myname{font-size:22px;font-weight:800;letter-spacing:-.02em}.profile .edit-pencil{font-size:13px;opacity:.5}.profile:hover .edit-pencil{opacity:1}.statbar{display:flex;justify-content:space-around;gap:var(--s-s);padding:var(--s-m)}.statbar .stat{text-align:center;flex:1}.statbar .stat .v{font-size:24px;font-weight:800}.statbar .stat .v.win{color:var(--success)}.statbar .stat .v.lose{color:var(--wrong)}.statbar .stat .k{font-size:12px;color:var(--text-secondary);font-weight:600;margin-top:2px}.namefields{display:flex;flex-direction:column;gap:var(--s-s)}.namefield{display:flex;flex-direction:column;gap:4px}.namefield .caption{padding-left:4px}.h2h{text-align:center}.h2h-tally{display:flex;align-items:center;justify-content:center;gap:var(--s-l)}.h2h-tally .side{display:flex;flex-direction:column;align-items:center;gap:2px}.h2h-tally .big{font-size:40px;font-weight:800;line-height:1}.h2h-tally .big.win{color:var(--success)}.h2h-tally .colon{font-size:32px;font-weight:800;color:var(--text-secondary)}.list{display:flex;flex-direction:column;gap:var(--s-s)}.row{display:flex;align-items:center;gap:var(--s-m);text-align:left;width:100%;cursor:pointer;font-family:var(--font);color:inherit}.duel-row{gap:var(--s-s);cursor:default}.duel-row .row-main{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:none;font-family:var(--font);color:inherit;cursor:pointer;display:flex;align-items:center;gap:var(--s-m);flex:1;min-width:0;text-align:left}.duel-row .row-del{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:var(--surface-2);border-radius:var(--r-pill);width:36px;height:36px;font-size:16px;flex:none;cursor:pointer;opacity:.7}.duel-row .row-del:hover{opacity:1;background:#ff453a2e}.row .grow{flex:1;min-width:0}.row .name{font-size:16px;font-weight:700}.row .status{font-size:13px;font-weight:600;margin-top:2px}.row .status.turn{color:var(--accent)}.row .status.waiting{color:var(--text-secondary)}.row .status.win{color:var(--correct)}.row .status.lose{color:var(--wrong)}.row .score{font-size:15px;font-weight:700}.row .chev{color:var(--text-secondary);font-size:20px}.empty{text-align:center;color:var(--text-secondary);padding:var(--s-xl) var(--s-m)}.empty .ic{font-size:44px;display:block;margin-bottom:var(--s-s);opacity:.7}.screen.game{justify-content:flex-start;gap:var(--s-m)}.gametop{display:flex;flex-direction:column;gap:var(--s-s)}.gamebar{display:flex;align-items:center;gap:var(--s-s)}.gamebar .progress{flex:1}.quit{-webkit-appearance:none;-moz-appearance:none;appearance:none;flex:none;width:34px;height:34px;border-radius:var(--r-pill);border:1px solid var(--hairline);background:var(--surface-2);color:var(--text-secondary);font-size:16px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center}.quit:hover{color:var(--text)}.gamestats{display:flex;align-items:center;gap:var(--s-s)}.gamestats .spacer{flex:1}.gamestats .qn-of{color:var(--text-secondary);font-size:13px;font-weight:600}.qcard{text-align:center;padding:var(--s-l) var(--s-m)}.qcard .topic{margin-bottom:var(--s-s)}.qcard .prompt{margin:0}.progress{display:flex;gap:var(--s-xs)}.seg{flex:1;height:6px;border-radius:var(--r-pill);background:var(--hairline);transition:background .25s ease,transform .2s ease}.seg.correct{background:var(--correct)}.seg.wrong{background:var(--wrong)}.seg.current{background:var(--accent);transform:scaleY(1.6)}.ring{width:64px;height:64px;flex:none;position:relative}.ring svg{transform:rotate(-90deg);display:block}.ring .num{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700}.prompt{font-size:24px;font-weight:800;line-height:1.3;text-align:center;margin:4px 0}.qimage{width:100%;max-height:200px;object-fit:cover;border-radius:var(--r-card)}.grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--s-s)}.answer{-webkit-appearance:none;-moz-appearance:none;appearance:none;font-family:var(--font);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--s-xs);min-height:96px;padding:var(--s-s);border-radius:var(--r-button);border:1px solid var(--hairline);background:var(--surface);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);color:var(--text);font-size:17px;font-weight:600;text-align:center;cursor:pointer;transition:transform .08s ease,background .25s ease,border-color .25s ease}.answer:active{transform:scale(.97)}.answer:disabled{cursor:default}.answer .fb{font-size:22px}.answer.correct{background:#28c76f2e;border-color:var(--correct);color:var(--correct);border-width:2px}.answer.wrong{background:#ff453a2e;border-color:var(--wrong);color:var(--wrong);border-width:2px}.answer.dimmed{opacity:.5}@media(min-width:768px){.prompt{font-size:28px}.answer{min-height:92px;font-size:19px}}.versus{display:flex;align-items:center;justify-content:center;gap:var(--s-l)}.fighter{display:flex;flex-direction:column;align-items:center;gap:var(--s-s)}.fighter .fname{font-weight:700}.vs-label{font-size:40px;font-weight:800;color:var(--accent)}.bigscore{font-size:56px;font-weight:800;color:var(--accent);line-height:1}.bigemoji{font-size:72px;line-height:1}.pillrow{display:flex;gap:var(--s-m);justify-content:center;flex-wrap:wrap}.landing .bigemoji{animation:float 3.2s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.landing .lead{max-width:30ch;line-height:1.5;font-size:16px}.landing h1{font-size:34px}.challenger{display:flex;flex-direction:column;align-items:center;gap:var(--s-xs)}.challenger .fname{font-weight:800;font-size:18px}.greet{font-size:20px;font-weight:800;color:var(--accent)}.login-nudge{display:flex;align-items:center;gap:var(--s-s);text-align:left;width:100%;max-width:420px}.login-nudge .ln-emoji{font-size:28px;flex:none}.login-nudge .ln-text{flex:1;min-width:0;font-size:14px}.login-nudge .ln-btn{width:auto;flex:none;padding:10px 18px}.waitroom{width:100%;max-width:420px;text-align:center}.scoreboard{display:flex;align-items:center;justify-content:space-around;gap:var(--s-m);width:100%}.scoreboard .col{display:flex;flex-direction:column;align-items:center;gap:var(--s-xs);flex:1}.scoreboard .pts{font-size:26px;font-weight:800}.scoreboard .pts.win{color:var(--success)}.scoreboard .dash{font-size:26px;font-weight:800;color:var(--text-secondary)}.breakdown{display:flex;flex-direction:column;gap:var(--s-xs);width:100%}.brow{display:flex;align-items:center;gap:var(--s-s)}.brow .cell{flex:1;display:flex;align-items:center;justify-content:center;gap:4px;padding:8px;border-radius:12px;background:var(--surface-2);font-size:14px;font-weight:600}.brow .cell.ok{color:var(--correct)}.brow .cell.no{color:var(--wrong)}.brow .qn{width:28px;text-align:center;color:var(--text-secondary);font-weight:700}.spinner{color:var(--text-secondary)}.error{color:var(--wrong)}input.field{width:100%;font-family:var(--font);font-size:17px;padding:14px var(--s-m);border-radius:var(--r-button);border:1px solid var(--hairline);background:var(--surface);color:var(--text)}input.field:focus{outline:2px solid var(--accent);border-color:transparent}.codebox{font-size:15px;font-weight:700;padding:14px var(--s-m);border-radius:var(--r-button);background:var(--surface-2);word-break:break-all;width:100%;text-align:center}.theme-toggle{position:fixed;top:calc(12px + env(safe-area-inset-top));right:14px;z-index:50;-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--glass-border);background:var(--surface);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);width:42px;height:42px;border-radius:var(--r-pill);font-size:19px;cursor:pointer;box-shadow:0 4px 10px var(--glass-shadow)}.theme-toggle:active{transform:scale(.94)}.steps{display:flex;flex-direction:column;gap:var(--s-s);width:100%}.step{display:flex;align-items:center;gap:var(--s-m);padding:var(--s-m);text-align:left}.step .num{flex:none;width:34px;height:34px;border-radius:var(--r-pill);background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}.step .txt{font-size:15px;font-weight:600}.step .txt .sub{color:var(--text-secondary);font-weight:500;font-size:13px;margin-top:2px}.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--s-s);width:100%}@media(min-width:768px){.topic-grid{grid-template-columns:repeat(3,1fr)}}.topic-tile{-webkit-appearance:none;-moz-appearance:none;appearance:none;font-family:var(--font);position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:4px;padding:var(--s-m);min-height:84px;border-radius:var(--r-button);border:2px solid transparent;background:var(--tile, var(--surface-2));color:#fff;cursor:pointer;text-align:left;overflow:hidden;transition:transform .08s ease,box-shadow .15s ease}.topic-tile:active{transform:scale(.97)}.topic-tile .t-emoji{font-size:26px}.topic-tile .t-name{font-weight:800;font-size:16px}.topic-tile .t-count{font-size:12px;opacity:.85;font-weight:600}.topic-tile.selected{box-shadow:0 0 0 3px var(--text),0 6px 16px var(--glass-shadow)}.topic-tile .check{position:absolute;top:8px;right:8px;font-size:16px;background:#00000040;border-radius:var(--r-pill);width:24px;height:24px;display:flex;align-items:center;justify-content:center}.mode-pick{display:flex;gap:var(--s-s)}.mode-tile{-webkit-appearance:none;-moz-appearance:none;appearance:none;font-family:var(--font);flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:var(--s-m);border-radius:var(--r-button);border:2px solid var(--hairline);background:var(--surface-2);color:var(--text);cursor:pointer;text-align:center}.mode-tile.active{border-color:var(--accent);background:var(--accent-soft)}.mode-tile .m-emoji{font-size:26px}.mode-tile .m-name{font-weight:800;font-size:16px}.mode-tile .m-sub{font-size:12px;color:var(--text-secondary)}.board-row{display:flex;align-items:center;gap:var(--s-s)}.board-row .rank{font-size:18px;font-weight:800;width:34px;text-align:center;flex:none}.board-row.me{border:2px solid var(--accent)}.board-row .you-tag{color:var(--accent);font-weight:700}.seg-control{display:flex;gap:var(--s-xs);width:100%}.seg-control button{flex:1;-webkit-appearance:none;-moz-appearance:none;appearance:none;font-family:var(--font);padding:10px;border-radius:var(--r-button);border:1px solid var(--hairline);background:var(--surface-2);color:var(--text);font-weight:700;cursor:pointer}.seg-control button.active{background:var(--accent);color:#fff;border-color:transparent}@keyframes fadeUp{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes popIn{0%{opacity:0;transform:scale(.8)}60%{transform:scale(1.06)}to{opacity:1;transform:scale(1)}}@keyframes vsPulse{0%,to{transform:scale(1)}50%{transform:scale(1.12)}}.screen:not(.game)>*{animation:fadeUp .45s cubic-bezier(.22,1,.36,1) both}.screen>*:nth-child(1){animation-delay:.02s}.screen>*:nth-child(2){animation-delay:.07s}.screen>*:nth-child(3){animation-delay:.12s}.screen>*:nth-child(4){animation-delay:.17s}.screen>*:nth-child(5){animation-delay:.22s}.screen>*:nth-child(6){animation-delay:.27s}.fade-up{animation:fadeUp .5s cubic-bezier(.22,1,.36,1) both}.delay-1{animation-delay:.12s}.delay-2{animation-delay:.24s}.versus .fighter:first-child .avatar{animation:popIn .5s cubic-bezier(.22,1,.36,1) both;animation-delay:.1s}.versus .fighter:last-child .avatar{animation:popIn .5s cubic-bezier(.22,1,.36,1) both;animation-delay:.28s}.vs-label{animation:vsPulse 1.8s ease-in-out infinite}@media(hover:hover){.row,.topic-tile,.chip,.btn,.puffy{transition:transform .14s ease,box-shadow .14s ease,opacity .15s ease,background .2s ease}.row:hover{transform:translateY(-2px)}.topic-tile:hover{transform:translateY(-3px);box-shadow:0 10px 22px var(--glass-shadow)}.btn:hover{transform:translateY(-1px);box-shadow:0 10px 18px var(--accent-soft)}.puffy:hover:not(:disabled){transform:translateY(-1px)}.chip:hover{transform:translateY(-1px)}.card.row:hover{box-shadow:0 12px 24px var(--glass-shadow)}}.bigemoji{animation:popIn .6s cubic-bezier(.34,1.56,.64,1) both}.bigscore{animation:popIn .6s cubic-bezier(.34,1.56,.64,1) both;animation-delay:.15s}.grid .answer{animation:fadeUp .3s ease both}.grid .answer:nth-child(1){animation-delay:.04s}.grid .answer:nth-child(2){animation-delay:.1s}.grid .answer:nth-child(3){animation-delay:.16s}.grid .answer:nth-child(4){animation-delay:.22s}@media(prefers-reduced-motion:reduce){*,.screen>*,.fade-up,.vs-label,.avatar.pending,.versus .avatar,.bigemoji,.bigscore,.grid .answer{animation:none!important;transition:none!important}}