:root{
  --bg:#08090d;--bg2:#0d0f16;--panel:#11131b;--panel2:#171a24;--text:#f7f8fc;--muted:#9298aa;
  --line:rgba(255,255,255,.08);--accent:#8cff00;--accent2:#b8ff5f;--danger:#ff4e72;--gold:#ffd54a;
  --radius:24px;--shadow:0 24px 80px rgba(0,0,0,.42);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif
}
*{box-sizing:border-box}html{background:var(--bg);scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 70% 10%,rgba(140,255,0,.08),transparent 26%),radial-gradient(circle at 10% 60%,rgba(93,75,255,.08),transparent 30%),var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}
button,input{font:inherit}.app-shell{width:min(1180px,100%);margin:auto;min-height:100vh;padding:0 28px 110px}.topbar{height:84px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);position:relative;z-index:10}.brand{display:flex;align-items:center;gap:11px;background:none;border:0;color:inherit;cursor:pointer;padding:0}.brand-mark{width:42px;height:42px;border-radius:12px;background:var(--accent);color:#050703;display:grid;place-items:center;font-size:26px;font-weight:1000;box-shadow:0 0 30px rgba(140,255,0,.22)}.brand-copy{display:flex;flex-direction:column;text-align:left;line-height:.95;letter-spacing:.08em}.brand-copy strong{font-size:15px}.brand-copy span{font-size:11px;color:var(--muted);letter-spacing:.25em;margin-top:4px}.top-stats{display:flex;gap:9px}.stat-chip{display:flex;gap:7px;align-items:center;background:rgba(255,255,255,.045);border:1px solid var(--line);border-radius:999px;padding:9px 13px;font-size:13px}.stat-chip b{font-variant-numeric:tabular-nums}.view{display:none;animation:fadeUp .28s ease both}.view.active{display:block}@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.hero-grid{display:grid;grid-template-columns:1.03fr .97fr;gap:70px;align-items:center;min-height:620px;padding:54px 0}.eyebrow{font-size:12px;font-weight:900;letter-spacing:.22em;color:var(--accent);text-transform:uppercase}.hero-copy h1{font-size:clamp(50px,6vw,82px);line-height:.92;letter-spacing:-.055em;margin:17px 0 24px;max-width:720px}.hero-copy h1 span{color:var(--accent)}.hero-lead{font-size:19px;line-height:1.55;color:#b2b7c4;max-width:590px}.hero-actions{display:flex;gap:12px;margin:34px 0}.primary-btn,.ghost-btn,.small-btn,.text-btn{border:0;cursor:pointer;font-weight:900;letter-spacing:.06em}.primary-btn{background:var(--accent);color:#071000;border-radius:16px;padding:16px 20px;box-shadow:0 16px 40px rgba(140,255,0,.15);transition:.2s transform,.2s box-shadow}.primary-btn:hover{transform:translateY(-2px);box-shadow:0 20px 50px rgba(140,255,0,.24)}.primary-btn.xl{min-height:58px;padding:0 25px}.primary-btn span{margin-left:14px}.install-btn{min-height:58px;padding:7px 15px 7px 10px;border-radius:16px;border:1px solid rgba(140,255,0,.35);background:rgba(140,255,0,.075);color:var(--text);display:flex;align-items:center;gap:11px;cursor:pointer;text-align:left;transition:.2s transform,.2s border-color,.2s background}.install-btn:hover{transform:translateY(-2px);border-color:rgba(140,255,0,.7);background:rgba(140,255,0,.11)}.install-btn:disabled{cursor:default;opacity:.72;transform:none}.install-btn-icon{width:38px;height:38px;border-radius:11px;background:var(--accent);color:#071000;display:grid;place-items:center;font-size:21px;font-weight:1000;flex:0 0 auto}.install-btn-copy{display:flex;flex-direction:column;line-height:1.05}.install-btn-copy b{font-size:11px;letter-spacing:.08em}.install-btn-copy small{margin-top:5px;color:var(--muted);font-size:9px;letter-spacing:.01em;white-space:nowrap}.ghost-btn{background:transparent;color:var(--text);border:1px solid var(--line);border-radius:16px;padding:0 20px;min-height:58px}.text-btn{display:block;margin:17px auto 0;background:transparent;color:var(--muted);padding:8px}.small-btn{padding:12px 16px;border-radius:12px;background:var(--accent);color:#071000}.trust-row{display:flex;gap:26px;color:var(--muted);font-size:12px}.trust-row b{color:#fff;margin-right:4px}.hero-demo{position:relative;display:grid;place-items:center}.demo-glow{position:absolute;width:350px;height:350px;background:var(--accent);opacity:.12;filter:blur(90px);border-radius:50%}.demo-card{position:relative;width:min(440px,100%);padding:30px;border-radius:32px;background:linear-gradient(145deg,#171a23,#0f1118);border:1px solid rgba(255,255,255,.1);box-shadow:var(--shadow);transform:rotate(2deg)}.demo-top{display:flex;justify-content:space-between;font-size:11px;font-weight:900;letter-spacing:.2em;color:#c0c4ce}.difficulty-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 18px var(--accent)}.demo-kicker{margin:38px 0 7px;text-align:center;font-size:10px;color:var(--accent);font-weight:900;letter-spacing:.17em}.demo-card h2{text-align:center;font-size:28px;margin:0 0 25px}.symbol-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.symbol-tile{height:96px;border-radius:18px;background:#0a0b10;border:1px solid var(--line);display:grid;place-items:center;font-size:40px}.symbol-tile.odd{border-color:rgba(140,255,0,.22)}.answer-preview{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:10px;text-align:center;color:#73798a;font-weight:900}.demo-timer{margin:26px auto 0;width:48px;height:48px;border:3px solid #303440;border-top-color:var(--accent);border-radius:50%;display:grid;place-items:center;position:relative}.demo-timer b{font-size:16px}.mode-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;padding-bottom:30px}.mode-card{background:rgba(17,19,27,.76);border:1px solid var(--line);border-radius:22px;padding:22px;min-height:165px}.mode-icon{font-size:26px;color:var(--accent)}.mode-card h3{margin:21px 0 8px;font-size:16px}.mode-card p{margin:0;color:var(--muted);line-height:1.5;font-size:13px}
.game-layout{width:min(720px,100%);margin:0 auto;padding:34px 0}.game-head{display:grid;grid-template-columns:48px 1fr;gap:14px;align-items:center;margin-bottom:18px}.icon-btn{width:46px;height:46px;border-radius:14px;background:#10121a;border:1px solid var(--line);color:#fff;font-size:28px;cursor:pointer}.level-meta{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:900;letter-spacing:.17em}.level-meta b{color:var(--accent);font-size:10px}.game-progress{grid-column:1/-1;height:4px;background:#1a1d27;border-radius:99px;overflow:hidden}.game-progress span{height:100%;display:block;width:10%;background:var(--accent);transition:width .3s ease}.challenge-card{background:linear-gradient(145deg,rgba(20,23,32,.98),rgba(13,15,22,.98));border:1px solid var(--line);border-radius:30px;padding:28px;box-shadow:var(--shadow);min-height:600px;display:flex;flex-direction:column;align-items:center}.challenge-meta-row{width:100%;display:flex;justify-content:space-between;align-items:center}.pill{font-size:10px;font-weight:900;letter-spacing:.15em;background:rgba(140,255,0,.08);border:1px solid rgba(140,255,0,.2);color:var(--accent);padding:7px 9px;border-radius:999px}.challenge-index{font-size:11px;color:var(--muted);font-weight:700}.challenge-kicker{color:var(--accent);font-size:10px;letter-spacing:.18em;font-weight:900;margin:34px 0 8px}.challenge-card h2{text-align:center;font-size:clamp(25px,5vw,38px);line-height:1.12;margin:0;max-width:620px}.visual-stage{width:100%;min-height:170px;display:grid;place-items:center;margin:28px 0 12px}.visual-grid{display:grid;grid-template-columns:repeat(3,minmax(80px,130px));gap:12px}.visual-cell{height:104px;background:#0a0c11;border:1px solid var(--line);border-radius:18px;display:grid;place-items:center;font-size:44px;font-weight:900;color:#f7f8fc}.visual-sequence{font-size:clamp(30px,8vw,54px);letter-spacing:.14em;font-weight:1000}.memory-stage{width:100%;min-height:170px;margin:28px 0 12px;display:grid;place-items:center}.memory-strip{display:flex;gap:13px;justify-content:center;flex-wrap:wrap}.memory-token{width:82px;height:82px;background:#090b10;border-radius:18px;border:1px solid var(--line);display:grid;place-items:center;font-size:37px}.memory-cover{color:var(--muted);font-size:13px;font-weight:800;letter-spacing:.14em}.reaction-stage{width:100%;min-height:245px;display:grid;place-items:center;align-content:center;gap:15px}.reaction-button{width:min(280px,90%);height:150px;border:0;border-radius:30px;background:#252936;color:#818797;font-size:30px;font-weight:1000;letter-spacing:.08em;transition:.15s}.reaction-button.go{background:var(--accent);color:#071000;box-shadow:0 0 60px rgba(140,255,0,.25);cursor:pointer}.reaction-button.too-soon{background:var(--danger);color:#fff}.reaction-stage p{margin:0;color:var(--muted)}.timer-wrap{width:62px;height:62px;position:relative;display:grid;place-items:center;margin:4px 0 20px}.timer-ring{position:absolute;width:62px;height:62px;transform:rotate(-90deg)}.timer-track,.timer-progress{fill:none;stroke-width:3}.timer-track{stroke:#282c36}.timer-progress{stroke:var(--accent);stroke-linecap:round;stroke-dasharray:113.1;stroke-dashoffset:0;transition:stroke-dashoffset .1s linear}.timer-wrap b{font-size:18px;font-variant-numeric:tabular-nums}.answers{width:100%;display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.answer-btn{min-height:76px;border-radius:18px;background:#0a0c11;border:1px solid var(--line);color:#fff;font-weight:900;font-size:16px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:.15s}.answer-btn span{width:27px;height:27px;border-radius:8px;background:#181b24;display:grid;place-items:center;color:#aeb4c0;font-size:11px}.answer-btn:hover{border-color:rgba(140,255,0,.35);transform:translateY(-1px)}.answer-btn.correct{border-color:var(--accent);background:rgba(140,255,0,.09)}.answer-btn.wrong{border-color:var(--danger);background:rgba(255,78,114,.08)}.micro-note{font-size:11px;color:#666c7b;margin-top:15px}.hidden{display:none!important}
.result-card,.pro-card{width:min(700px,100%);margin:64px auto 0;background:linear-gradient(145deg,#141720,#0d0f15);border:1px solid var(--line);border-radius:32px;padding:42px;box-shadow:var(--shadow);text-align:center}.result-burst{width:96px;height:96px;border-radius:50%;display:grid;place-items:center;margin:0 auto 22px;background:rgba(140,255,0,.1);border:1px solid rgba(140,255,0,.3);color:var(--accent);font-size:45px;font-weight:1000}.result-burst.wrong{background:rgba(255,78,114,.1);border-color:rgba(255,78,114,.32);color:var(--danger)}.result-card h2,.pro-card h2{font-size:clamp(35px,6vw,56px);letter-spacing:-.04em;margin:10px 0}.result-card>p,.pro-card>p{color:var(--muted);font-size:16px;line-height:1.6;max-width:540px;margin:0 auto 30px}.result-score-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:27px 0}.result-score-grid div,.panel{background:#0a0c11;border:1px solid var(--line);border-radius:18px}.result-score-grid div{padding:18px 12px}.result-score-grid span{display:block;color:var(--muted);font-size:9px;font-weight:900;letter-spacing:.14em;margin-bottom:8px}.result-score-grid b{font-size:20px}.section-head{margin:54px 0 25px}.section-head h2{font-size:44px;margin:8px 0 4px;letter-spacing:-.04em}.muted{color:var(--muted);line-height:1.5}.profile-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:16px}.profile-panel{padding:27px}.avatar{width:92px;height:92px;border-radius:26px;background:var(--accent);color:#071000;font-size:40px;font-weight:1000;display:grid;place-items:center;margin-bottom:28px}.field-label{display:block;color:var(--muted);font-size:11px;font-weight:900;letter-spacing:.14em;margin-bottom:9px}.inline-field{display:flex;gap:8px}.inline-field input{min-width:0;flex:1;border-radius:12px;border:1px solid var(--line);background:#090b10;color:#fff;padding:12px 13px;outline:none}.inline-field input:focus{border-color:rgba(140,255,0,.4)}.profile-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px}.metric{padding:25px;display:flex;flex-direction:column;justify-content:center}.metric span{font-size:11px;color:var(--muted);font-weight:800}.metric b{font-size:38px;letter-spacing:-.03em;margin-top:8px}.leaderboard{overflow:hidden}.rank-row{display:grid;grid-template-columns:46px 1fr auto;align-items:center;gap:15px;padding:18px 20px;border-bottom:1px solid var(--line)}.rank-row:last-child{border-bottom:0}.rank-pos{font-size:13px;font-weight:1000;color:var(--muted)}.rank-player{display:flex;align-items:center;gap:12px}.rank-avatar{width:38px;height:38px;border-radius:12px;background:#1d202b;display:grid;place-items:center;font-weight:1000;color:#c7ccd6}.rank-name{font-weight:850}.rank-row.you{background:rgba(140,255,0,.055)}.rank-row.you .rank-avatar{background:var(--accent);color:#071000}.rank-score{font-weight:1000;font-variant-numeric:tabular-nums}.pro-card{position:relative;overflow:hidden}.pro-card:before{content:"";position:absolute;width:400px;height:400px;background:var(--accent);filter:blur(130px);opacity:.08;right:-200px;top:-200px}.pro-badge{display:inline-grid;place-items:center;background:var(--accent);color:#071000;border-radius:999px;padding:8px 14px;font-size:11px;font-weight:1000;letter-spacing:.13em;margin-bottom:17px}.price{margin:22px 0}.price b{font-size:58px;letter-spacing:-.05em}.price span{color:var(--muted)}.feature-list{display:grid;grid-template-columns:1fr 1fr;text-align:left;gap:12px 18px;margin:30px auto;max-width:480px;color:#c6cad4;font-size:13px}
.bottom-nav{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);width:min(560px,calc(100% - 28px));height:72px;padding:7px 10px;display:grid;grid-template-columns:repeat(5,1fr);align-items:center;background:rgba(15,17,24,.88);backdrop-filter:blur(22px);border:1px solid var(--line);border-radius:22px;z-index:30;box-shadow:0 18px 55px rgba(0,0,0,.45)}.bottom-nav>button{border:0;background:transparent;color:#747a8b;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;font-size:18px}.bottom-nav>button b{font-size:9px;letter-spacing:.06em}.bottom-nav>button.active{color:var(--text)}.bottom-nav .play-tab{width:58px;height:58px;border-radius:18px;background:var(--accent);color:#071000;margin:auto;transform:translateY(-13px);box-shadow:0 14px 35px rgba(140,255,0,.19)}.toast{position:fixed;left:50%;bottom:105px;transform:translate(-50%,12px);background:#fff;color:#090b10;border-radius:999px;padding:11px 16px;font-size:12px;font-weight:850;opacity:0;pointer-events:none;transition:.2s;z-index:50}.toast.show{opacity:1;transform:translate(-50%,0)}
.install-sheet{position:fixed;inset:0;z-index:100;display:grid;align-items:end;justify-items:center}.install-sheet.hidden{display:none!important}.install-sheet-backdrop{position:absolute;inset:0;border:0;background:rgba(2,3,5,.72);backdrop-filter:blur(8px);cursor:pointer}.install-sheet-panel{position:relative;width:min(520px,calc(100% - 20px));margin:0 10px 10px;padding:16px 24px 28px;border:1px solid rgba(255,255,255,.12);border-radius:28px;background:linear-gradient(180deg,#171a23,#0c0e14);box-shadow:0 -18px 80px rgba(0,0,0,.55);text-align:center;animation:sheetUp .22s ease both}.install-sheet-handle{width:45px;height:5px;border-radius:99px;background:#3a3e49;margin:0 auto 18px}.install-sheet-icon{width:64px;height:64px;margin:0 auto 15px;border-radius:18px;background:var(--accent);color:#071000;display:grid;place-items:center;font-size:36px;font-weight:1000}.install-sheet-panel h2{font-size:28px;line-height:1.05;letter-spacing:-.035em;margin:11px auto 20px;max-width:390px}.install-steps{display:grid;gap:10px;text-align:left;margin:0 0 20px}.install-step{display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:center;padding:12px 13px;border-radius:15px;border:1px solid var(--line);background:#0a0c11}.install-step-num{width:30px;height:30px;border-radius:9px;background:rgba(140,255,0,.11);color:var(--accent);display:grid;place-items:center;font-size:12px;font-weight:1000}.install-step b{display:block;font-size:12px;margin-bottom:3px}.install-step span{display:block;color:var(--muted);font-size:11px;line-height:1.35}.install-close{width:100%}@keyframes sheetUp{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:none}}
@media(max-width:800px){.app-shell{padding:0 18px 105px}.topbar{height:70px}.hero-grid{grid-template-columns:1fr;gap:20px;padding:44px 0 28px;min-height:0}.hero-copy h1{font-size:52px}.hero-lead{font-size:16px}.hero-demo{margin-top:20px}.demo-card{transform:none}.mode-grid{grid-template-columns:1fr 1fr}.trust-row{gap:13px;flex-wrap:wrap}.profile-grid{grid-template-columns:1fr}.result-card,.pro-card{margin-top:32px;padding:28px 20px}.section-head h2{font-size:36px}}
@media(max-width:520px){.brand-mark{width:38px;height:38px}.stat-chip{padding:8px 10px}.hero-copy h1{font-size:45px}.hero-actions{display:grid}.install-btn,.ghost-btn{width:100%}.install-btn{justify-content:flex-start}.mode-grid{grid-template-columns:1fr}.demo-card{padding:22px}.symbol-tile{height:82px}.challenge-card{padding:22px 15px;min-height:575px}.visual-grid{grid-template-columns:repeat(3,1fr);width:100%}.visual-cell{height:86px;font-size:36px}.answers{gap:7px}.answer-btn{min-height:70px;flex-direction:column;gap:5px;font-size:14px}.result-score-grid{gap:6px}.result-score-grid div{padding:15px 5px}.result-score-grid b{font-size:16px}.profile-stats{gap:8px}.metric{padding:19px 16px}.metric b{font-size:29px}.feature-list{grid-template-columns:1fr}.bottom-nav{bottom:10px;height:68px}.rank-row{padding:15px 13px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

/* QUIZVIX 0.2.0 — language selector / 100-level release */
.hero-copy h1 .title-plain{color:var(--text)}
.top-actions{display:flex;align-items:center;gap:10px}
.language-picker{height:38px;display:flex;align-items:center;gap:6px;padding:0 8px 0 10px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.045);color:var(--muted)}
.language-globe{font-size:14px;color:var(--accent)}
.language-picker select{appearance:none;border:0;outline:0;background:transparent;color:var(--text);font-size:11px;font-weight:900;letter-spacing:.08em;cursor:pointer;padding:0 3px}
.language-picker option{background:#11131b;color:#fff}
@media(max-width:520px){.top-actions{gap:6px}.language-picker{height:36px;padding:0 6px}.language-globe{display:none}.language-picker select{font-size:10px}.top-stats{gap:5px}.stat-chip{padding:7px 8px}}

.account-field{width:100%;padding:12px;border-radius:10px;border:1px solid #38405a;background:#151827;color:white;font:inherit}.consent-row{display:flex;align-items:flex-start;gap:10px;margin:16px 0}#accountSection{margin-bottom:20px}#orderList .panel{margin-top:12px;overflow-wrap:anywhere}.visual-cell{font-size:clamp(18px,4vw,36px)}.mode-grid{grid-template-columns:repeat(3,1fr)}@media(max-width:650px){.mode-grid{grid-template-columns:1fr}}

.visual-cell{display:flex;flex-direction:column;align-items:center;gap:5px}.visual-cell small{font:11px system-ui;color:#93a2c9}.memory-strip{flex-wrap:wrap}.memory-token{min-width:55px;font-size:24px}.mode-grid{grid-template-columns:repeat(3,minmax(0,1fr))}@media(max-width:650px){.mode-grid{grid-template-columns:1fr}}

/* QUIZVIX brand assets, release 1.0.56 */
.brand-logo{display:block;width:210px;height:auto;max-width:100%;object-fit:contain}
.brand{flex-shrink:0}
.install-sheet-icon{background:#08090d;box-shadow:none;overflow:hidden}
.install-sheet-icon img{display:block;width:100%;height:100%;object-fit:contain}
@media(max-width:600px){.brand-logo{width:160px}}
@media(max-width:380px){.brand-logo{width:140px}.top-stats{gap:4px}.stat-chip{padding:7px 8px}}

.share-panel{max-width:760px;margin:auto}.share-panel input{width:100%;min-width:0}.plan-compare{display:grid;grid-template-columns:1fr 1fr;gap:16px;text-align:left;margin:24px 0}.plan-compare>div{border:1px solid var(--line);padding:16px;border-radius:16px}.plan-compare p{font-size:14px;line-height:1.6}.sponsor-card{margin-top:28px}.sponsor-card small{display:block;color:var(--muted);margin-bottom:8px}.sponsor-card a{display:flex;flex-direction:column;gap:6px;color:inherit;text-decoration:none}.sponsor-card a:hover b{text-decoration:underline}[hidden]{display:none!important}button:disabled{opacity:.55;cursor:default}#resultSaveStatus{min-height:1.5em}@media(max-width:600px){.plan-compare{grid-template-columns:1fr}.topbar{gap:8px}.brand-logo{width:clamp(108px,30vw,160px)}.top-actions{gap:5px}.stat-chip{padding:7px 6px;font-size:11px}.language-picker{padding:4px}.app-shell{overflow-wrap:anywhere}.hero-actions{flex-wrap:wrap}}

.share-panel{padding:24px}.sponsor-card{padding:20px}@media(max-width:600px){.share-panel{padding:18px}}


/* QUIZVIX 1.0.60: one-tap picture answers on phones and desktops */
.visual-stage,.memory-stage{align-content:center;justify-items:center;gap:16px}
.choice-grid{width:min(100%,520px);grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.visual-cell.tile-answer{
  box-sizing:border-box;width:100%;min-width:0;min-height:104px;height:auto;
  padding:9px 6px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:7px;border:2px solid #343947;border-radius:18px;
  background:#0a0c11;color:#fff;cursor:pointer;user-select:none;
  -webkit-tap-highlight-color:transparent;touch-action:manipulation;
  transition:background-color .14s,border-color .14s,transform .14s;
}
.tile-answer .choice-badge{
  width:25px;height:22px;flex-shrink:0;border-radius:7px;
  background:#242936;color:#cfd8e7;display:grid;place-items:center;
  font:800 11px/1 system-ui,sans-serif;
}
.tile-answer .choice-content{
  display:block;max-width:100%;font-size:clamp(19px,3.4vw,30px);
  line-height:1.15;letter-spacing:-.035em;font-weight:900;
  white-space:nowrap;text-align:center;
}
.tile-answer:focus-visible{outline:3px solid #fff;outline-offset:3px}
.tile-answer:hover:not(:disabled){border-color:rgba(140,255,0,.62);transform:translateY(-1px)}
.tile-answer:active:not(:disabled){transform:scale(.97)}
.tile-answer:disabled{opacity:1;cursor:default;transform:none}
.tile-answer.correct,.tile-answer.correct:disabled{border-color:var(--accent);background:rgba(140,255,0,.18);box-shadow:inset 0 0 0 1px rgba(140,255,0,.24)}
.tile-answer.wrong,.tile-answer.wrong:disabled{border-color:var(--danger);background:rgba(255,78,114,.17);box-shadow:inset 0 0 0 1px rgba(255,78,114,.2)}
.tile-answer.correct .choice-badge{color:#071000;background:var(--accent)}
.tile-answer.wrong .choice-badge{color:#fff;background:var(--danger)}
.visual-sequence{max-width:100%;overflow-wrap:anywhere;text-align:center}
@media(max-width:520px){
  .visual-stage,.memory-stage{margin:18px 0 10px;min-height:150px;gap:13px}
  .choice-grid{width:100%;gap:7px}
  .visual-cell.tile-answer{min-height:92px;padding:7px 3px;gap:5px;border-radius:15px}
  .tile-answer .choice-content{font-size:clamp(16px,5.2vw,24px)}
  .visual-sequence{font-size:clamp(25px,7vw,38px);letter-spacing:.04em}
}
@media(max-width:350px){
  .visual-cell.tile-answer{min-height:84px;padding:6px 2px}
  .tile-answer .choice-content{font-size:16px;letter-spacing:-.055em}
}

/* QUIZVIX 1.0.61 — diverse game mechanics on mobile */
.count-stage {display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:10px;max-width:100%;margin:3px 0 8px}
.count-token {display:inline-grid;place-items:center;min-width:43px;min-height:48px;font-size:37px;line-height:1}
.visual-sequence.compact {font-size:clamp(18px,5.7vw,31px);line-height:1.25;letter-spacing:0;white-space:normal}
@media(max-width:520px){.count-stage{gap:5px}.count-token{min-width:36px;min-height:42px;font-size:29px}}

/* QUIZVIX 1.0.62: verified daily arena and premium coach */
.arena-header{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin:36px 0 26px}
.arena-header h2{font-size:clamp(36px,5vw,56px);line-height:1;letter-spacing:-.04em;margin:10px 0}
.arena-season-badge,.arena-chip{border:1px solid rgba(140,255,0,.29);background:rgba(140,255,0,.10);border-radius:999px;padding:8px 12px;color:var(--accent);font-size:12px;font-weight:850;letter-spacing:.07em;white-space:nowrap}
.arena-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.85fr);gap:18px;align-items:start}
.arena-main,.arena-side{display:grid;gap:18px;min-width:0}
.arena-grid .panel{border:1px solid var(--line);border-radius:23px;padding:25px;background:linear-gradient(160deg,#141823,#0d0f15)}
.arena-intro-card{background:radial-gradient(circle at 100% 0%,rgba(140,255,0,.13),transparent 45%),#10121a!important}
.arena-intro-top{display:flex;justify-content:space-between;gap:12px;align-items:center}
.arena-intro-card h3{font-size:clamp(26px,3vw,34px);letter-spacing:-.035em;margin:15px 0 8px}
.arena-intro-card .muted{line-height:1.5}
.arena-daily-progress{margin:22px 0 14px;color:var(--accent);font-weight:850;font-size:15px}
.arena-intro-card .primary-btn{width:100%;min-height:56px}
.arena-intro-card .primary-btn:disabled{opacity:.6;cursor:not-allowed}
.arena-notice{margin-top:16px;color:#aab2c3;min-height:21px;font-size:13px;line-height:1.45}
.arena-round-meta,.arena-league-tabs{display:flex;align-items:center;justify-content:space-between;gap:8px}
.arena-round-meta{font-weight:850}
.arena-progress-track{height:7px;width:100%;overflow:hidden;margin:15px 0 25px;border-radius:99px;background:#313746}
.arena-progress-track>span{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}
.arena-play-zone h3{font-size:clamp(23px,3vw,30px);line-height:1.24;margin:0 0 23px;text-align:center}
.arena-puzzle{text-align:center;max-width:100%;overflow-wrap:anywhere;margin:10px 0 23px;min-height:35px;display:grid;place-items:center}
.arena-sequence{font-size:clamp(20px,3.1vw,31px);line-height:1.4;white-space:pre-wrap;font-weight:900;letter-spacing:.01em}
.arena-memory-strip{display:flex;align-items:center;justify-content:center;gap:9px;flex-wrap:wrap}
.arena-memory-strip>span{border:1px solid var(--line);border-radius:12px;padding:10px 13px;background:#1d2330;font-size:26px;font-weight:800}
.arena-choice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:auto;max-width:560px}
.arena-tile{font-size:25px;min-height:100px!important}
.arena-tile .choice-content{white-space:normal;overflow-wrap:anywhere;line-height:1.17}
.arena-feedback{font-weight:800;min-height:26px;text-align:center;margin:20px 0 0;color:var(--accent)}
.arena-league-tabs{justify-content:flex-start;margin-bottom:19px;flex-wrap:wrap}
.arena-league-tabs .small-btn{border:1px solid #3a4150;color:#dce3ed;border-radius:13px;padding:10px 13px;min-width:75px}
.arena-league-tabs .small-btn.active{color:#081000;background:var(--accent);border-color:var(--accent)}
.arena-ranks-panel h3{font-size:20px;line-height:1.25;margin-bottom:17px}
.arena-rank-list{min-height:100px}
.arena-rank{display:flex;gap:11px;align-items:center;border-top:1px solid var(--line);padding:12px 0;font-size:13px}
.arena-rank:first-child{border-top:0}.arena-rank>strong{min-width:33px;text-align:center}.arena-rank>span{min-width:0;flex:1;font-weight:700;overflow-wrap:anywhere}.arena-rank>span small{display:block;color:var(--muted);margin-top:3px;font-size:11px;font-weight:500}.arena-rank>b{font-variant-numeric:tabular-nums;color:var(--accent)}.arena-rank.you{background:rgba(140,255,0,.055);border-radius:10px;padding-inline:7px}
.arena-prizes-panel .eyebrow,.arena-hall-panel .eyebrow{display:block;margin-bottom:16px}
.arena-prize-row{border-top:1px solid var(--line);display:grid;grid-template-columns:32px minmax(0,1fr) minmax(0,1fr);gap:8px;align-items:center;padding:12px 0;font-size:12px;font-weight:750;line-height:1.35}
.arena-prize-row>span:last-child{color:var(--accent)}.arena-footnote{font-size:12px;line-height:1.55;margin:12px 0 0}
.arena-hall-panel h3{font-size:20px;margin:0 0 12px}.arena-champ{display:flex;align-items:center;gap:12px;border-top:1px solid var(--line);padding:10px 0}.arena-champ>span{font-size:22px}.arena-champ>div{flex:1}.arena-champ>div small{display:block;color:var(--muted)}.arena-champ>strong{font-size:12px;color:var(--accent)}
.arena-coach-panel h3{font-size:22px;margin:12px 0}.arena-coach-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:17px}.arena-coach-stats div{border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.02);padding:12px}.arena-coach-stats b{display:block;font-size:22px;color:var(--accent)}.arena-coach-stats small{display:block;margin-top:6px;font-size:11px;color:var(--muted);line-height:1.35}
@media(max-width:820px){.arena-grid{grid-template-columns:1fr}.arena-header{align-items:flex-start}.arena-season-badge{margin-top:10px}}
@media(max-width:520px){.arena-grid .panel{padding:18px 14px}.arena-header{margin-top:22px}.arena-header h2{font-size:35px}.arena-choice-grid{gap:7px}.arena-tile{min-height:88px!important;padding:6px 3px}.arena-tile .choice-content{font-size:clamp(16px,5vw,23px)}.arena-coach-stats{gap:5px}.arena-coach-stats div{padding:8px}.arena-coach-stats b{font-size:18px}.arena-prize-row{font-size:11px;gap:5px}}

/* 1.0.64: account entitlement clarity. */
#accountAccessDetails{margin:8px 0 10px;font-size:13px;overflow-wrap:anywhere;line-height:1.5}
#refreshProBtn{margin-bottom:12px}
#proAccessStatus{font-size:14px;font-weight:750;color:#b7f882}
#arenaLeagueExplanation{font-size:13px;line-height:1.5;margin:8px 0}

.access-badge{display:inline-flex;align-items:center;justify-content:center;padding:5px 9px;border:1px solid #455068;border-radius:99px;color:#cdd6e8;font:800 11px/1.2 system-ui,sans-serif;white-space:nowrap}.access-badge.pro{background:#b7f882;border-color:#b7f882;color:#11140a}@media(max-width:420px){.access-badge{font-size:10px;padding:5px 7px}}

/* QUIZVIX 1.0.2: loading, clear actions and accessible account flow */
.qvx-loading .app-shell{visibility:hidden}.qvx-loading body::before{content:'QUIZVIX …';position:fixed;inset:0;display:grid;place-items:center;color:var(--accent);font-size:24px;font-weight:900}
.hero-copy .hero-actions{flex-wrap:wrap}.hero-copy .hero-actions>button{flex:0 0 auto;min-height:54px}.hero-copy .install-help{margin:-18px 0 24px;text-align:left;text-decoration:underline;font-size:13px;letter-spacing:normal}.account-intent{padding:16px;border:1px solid rgba(140,255,0,.25);border-radius:14px;background:rgba(140,255,0,.06);line-height:1.6}.account-field{font-size:16px!important}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.install-sheet-panel{max-height:calc(100dvh - 24px);overflow-y:auto;padding-bottom:max(24px,env(safe-area-inset-bottom))}
@media(max-width:520px){.hero-copy .hero-actions{display:grid;grid-template-columns:1fr 1fr}.hero-copy .hero-actions>button:first-child,.hero-copy .hero-actions>.install-btn{grid-column:1/-1}.hero-copy .hero-actions>button{padding:12px;font-size:12px;letter-spacing:.02em}.hero-copy .install-help{margin:-14px 0 20px}.micro-note{font-size:12px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;scroll-behavior:auto!important;transition:none!important}}

/* QUIZVIX H5: optional cosmetic reward; never affects score, timer or League. */
.qvx-reward-box{border:1px solid rgba(190,155,72,.45);background:rgba(190,155,72,.07);padding:12px 16px;margin:12px 0;border-radius:12px;text-align:center}
.qvx-reward-box.hidden{display:none!important}.qvx-reward-box p{font-size:12px;line-height:1.5;margin:3px 0 10px}.qvx-reward-box .small-btn{max-width:100%}
.qvx-gold-aura #profileAvatar{box-shadow:0 0 0 3px #d9aa50,0 0 28px rgba(249,194,92,.55)!important;outline:1px solid #ffecb0}