:root{color:#f6fbff;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;background:#07111f;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0;overflow:hidden}html,body,#root{height:100%}button,input{font:inherit}button{cursor:pointer;border:0}button:focus-visible,input:focus-visible{outline-offset:3px;outline:3px solid #41d5ff5c}.app-shell{background:radial-gradient(circle at 16% 12%,#41d5ff2e,#0000 28rem),radial-gradient(circle at 84% 6%,#ffbe4926,#0000 24rem),#07111f;grid-template-columns:minmax(0,1fr) minmax(320px,410px);height:100dvh;min-height:100vh;display:grid;overflow:hidden}.math-arena{grid-template-rows:auto minmax(0,1fr);min-height:100vh;padding:24px;display:grid;position:relative;overflow:hidden}.arena-grid{background-image:linear-gradient(#5a7da61a 1px,#0000 1px),linear-gradient(90deg,#5a7da61a 1px,#0000 1px);background-size:48px 48px;position:absolute;inset:0;-webkit-mask-image:linear-gradient(#0000,#000 18% 78%,#0000);mask-image:linear-gradient(#0000,#000 18% 78%,#0000)}.arena-topbar{z-index:1;justify-content:space-between;align-items:center;gap:16px;display:flex;position:relative}.brand-lockup{color:#e9f8ff;align-items:center;gap:12px;font-size:.95rem;font-weight:900;display:inline-flex}.brand-mark{color:#41d5ff;background:#0d2135;border:1px solid #41d5ff94;border-radius:8px;place-items:center;width:34px;height:34px;font-size:1.35rem;line-height:1;display:grid;box-shadow:0 0 24px #41d5ff29}.topbar-actions{justify-content:flex-end;align-items:center;gap:10px;display:flex}.ghost-button{color:#dce9f5;background:#07111fc2;border:1px solid #a4b4c952;border-radius:7px;padding:.66rem .9rem;font-size:.86rem;font-weight:800}.ghost-button:hover{color:#fff;border-color:#41d5ff94}.music-button.is-active{color:#41d5ff;background:#0d2b43;border-color:#41d5ffb8;box-shadow:0 0 24px #41d5ff2e}.question-stage{z-index:1;align-content:center;gap:22px;width:min(820px,100%);margin:0 auto;padding:24px 0 36px;display:grid;position:relative}.score-strip{grid-template-columns:repeat(3,1fr);gap:12px;padding-top:42px;display:grid}.score-tile{background:#0a1c30c7;border:1px solid #50739670;border-radius:8px;padding:15px;position:relative;box-shadow:0 18px 52px #0000002e}.score-tile.has-trophies{padding-top:18px}.score-trophy-row{z-index:4;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;width:min(620px,100vw - 48px);display:flex;position:absolute;top:-42px;left:50%;transform:translate(-50%)}.score-trophy{color:#211101;border:1px solid #fde047b8;border-radius:8px;place-items:center;width:42px;height:42px;display:grid;position:relative;box-shadow:0 16px 34px #fde04742}.score-trophy:focus-visible{outline-offset:4px;outline:3px solid #f6fbff70}.score-trophy:after{z-index:5;color:#06111f;content:attr(data-tooltip);opacity:0;pointer-events:none;text-align:center;white-space:normal;background:#f6fbff;border:1px solid #f6fbffe0;border-radius:8px;width:max-content;max-width:min(240px,70vw);padding:8px 10px;font-size:.74rem;font-weight:850;line-height:1.25;transition:opacity .13s,transform .13s;position:absolute;bottom:calc(100% + 10px);left:50%;transform:translate(-50%,4px);box-shadow:0 16px 38px #00000061}.score-trophy:before{z-index:6;content:"";opacity:0;pointer-events:none;background:#f6fbff;width:10px;height:10px;transition:opacity .13s,transform .13s;position:absolute;bottom:calc(100% + 4px);left:50%;transform:translate(-50%,4px)rotate(45deg)}.score-trophy:hover:after,.score-trophy:hover:before,.score-trophy:focus-visible:after,.score-trophy:focus-visible:before{opacity:1;transform:translate(-50%)}.score-trophy-champion{background:linear-gradient(135deg,#fde047,#f97316)}.score-trophy-rename{color:#160326;background:linear-gradient(135deg,#f5d0fe,#c084fc 46%,#7c3aed);border-color:#d8b4fec2;box-shadow:0 16px 36px #c084fc4d}.score-trophy-shame{color:#050816;background:linear-gradient(135deg,#cbd5e1,#64748b 46%,#1e293b);border-color:#94a3b8b8;box-shadow:0 16px 36px #0f172a61}.score-trophy-points10k{color:#051225;background:linear-gradient(135deg,#e0f2fe,#38bdf8 46%,#2563eb);border-color:#7dd3fcb8;box-shadow:0 16px 36px #38bdf847}.score-trophy-points25k{color:#031408;background:linear-gradient(135deg,#dcfce7,#22c55e 46%,#15803d);border-color:#86efacc2;box-shadow:0 16px 36px #22c55e47}.score-trophy-points100k{color:#211101;background:linear-gradient(135deg,#fef9c3,#facc15 46%,#f97316);border-color:#fde047c2;box-shadow:0 16px 36px #facc154d}.score-trophy-points1m{color:#06111f;background:linear-gradient(135deg,#ecfeff,#67e8f9 42%,#6366f1);border-color:#ecfeffc7;box-shadow:0 16px 38px #67e8f94d}.score-trophy-streak100{color:#211101;background:linear-gradient(135deg,#ffedd5,#fb923c 46%,#c2410c);border-color:#fb923cc2;box-shadow:0 16px 36px #fb923c4d}.score-trophy-streak250{color:#2a0404;background:linear-gradient(135deg,#fee2e2,#f87171 46%,#b91c1c);border-color:#f87171c2;box-shadow:0 16px 36px #f871714d}.score-trophy-fast20{color:#160326;background:linear-gradient(135deg,#f5f3ff,#a78bfa 42%,#7c3aed);border-color:#c4b5fdc7;box-shadow:0 16px 38px #a78bfa4d}.score-trophy svg{width:30px;height:30px}.score-trophy path{fill:none;stroke:currentColor;stroke-width:3.4px;stroke-linecap:round;stroke-linejoin:round}.score-tile span,.panel-kicker{color:#8fb2d0;letter-spacing:0;text-transform:uppercase;margin:0 0 5px;font-size:.72rem;font-weight:900;display:block}.score-tile strong{color:#fff;font-size:clamp(1.25rem,2.5vw,2rem);line-height:1;display:block}.question-card{background:linear-gradient(135deg,#0e2942f5,#08192bf5),#0e2942;border:1px solid #41d5ff3d;border-radius:8px;padding:clamp(28px,5vw,52px);position:relative;box-shadow:inset 0 1px #ffffff14,0 32px 80px #0000004d}.question-card.streak-tier-silver{border-color:#cbd5e1;box-shadow:inset 0 1px #ffffff1a,0 0 0 2px #cbd5e161,0 32px 80px #0000004d}.question-card.streak-tier-gold{border-color:#facc15;box-shadow:inset 0 1px #ffffff1a,0 0 0 2px #facc156b,0 0 34px #facc152e,0 32px 80px #0000004d}.question-card.streak-tier-diamond{border-color:#67e8f9;box-shadow:inset 0 1px #ffffff24,0 0 0 2px #67e8f985,0 0 38px #67e8f93d,0 32px 80px #0000004d}.question-card.streak-tier-rainbow{background:linear-gradient(135deg,#0e2942f5,#08192bf5) 0 0/100% 100% padding-box padding-box,linear-gradient(90deg,#ff3b30,#fc0,#34c759,#32ade6,#5856d6,#ff2d55,#ff3b30) 0 0/220% 100% border-box;border-color:#0000;animation:2.8s linear infinite rainbow-border-shift;box-shadow:inset 0 1px #ffffff24,0 0 0 2px #ffffff24,0 0 42px #5856d63d,0 32px 80px #0000004d}.question-card.streak-tier-ruby{border-color:#fb7185;box-shadow:inset 0 1px #ffffff24,0 0 0 2px #fb718585,0 0 40px #fb71853d,0 32px 80px #0000004d}.question-card.streak-tier-emerald{border-color:#34d399;box-shadow:inset 0 1px #ffffff24,0 0 0 2px #34d3998a,0 0 42px #34d3993d,0 32px 80px #0000004d}.question-label,.feedback,.progress-copy,.reward-log small,.empty-log{color:#a9bfd3;margin:0}.question-label{text-transform:uppercase;font-size:.88rem;font-weight:900}h1,h2,p{margin-top:0}h1{color:#fff;margin:12px 0 0;font-size:clamp(4.6rem,12vw,9.6rem);font-weight:950;line-height:.9}.equals-line{color:#ffbe49;margin:8px 0 26px;font-size:clamp(2rem,4vw,3.2rem);font-weight:950;line-height:1}.answer-form{grid-template-columns:minmax(0,1fr) auto;gap:12px;display:grid}.answer-form input{color:#fff;background:#07111f;border:1px solid #a4b4c952;border-radius:8px;width:100%;min-height:58px;padding:0 18px;font-size:1.2rem;font-weight:850}.answer-form input::placeholder{color:#728aa1}.answer-form input:read-only{cursor:pointer}.answer-form button{color:#211101;background:linear-gradient(135deg,#ffbe49,#ff8f3d);border-radius:8px;min-height:58px;padding:0 22px;font-size:.95rem;font-weight:950;box-shadow:0 16px 34px #ff8f3d33}.answer-form button:hover{transform:translateY(-1px)}.question-card.streak-tier-silver-submit .answer-form button,.question-card.streak-tier-silver .answer-form button{color:#0f172a;background:linear-gradient(135deg,#f8fafc,#cbd5e1 48%,#94a3b8);box-shadow:0 18px 36px #cbd5e13d,inset 0 1px #ffffffb8}.question-card.streak-tier-gold .answer-form button{color:#211101;background:linear-gradient(135deg,#ffe878,#facc15 48%,#f59e0b);box-shadow:0 18px 36px #facc154d}.question-card.streak-tier-diamond .answer-form button{color:#03131a;background:linear-gradient(135deg,#ecfeff,#67e8f9 42%,#38bdf8);box-shadow:0 18px 38px #67e8f947,inset 0 1px #ffffffb8}.question-card.streak-tier-rainbow .answer-form button{color:#fff;text-shadow:0 1px 2px #00000061;background:linear-gradient(90deg,#ff3b30,#fc0,#34c759,#32ade6,#5856d6,#ff2d55,#ff3b30) 0 0/220% 100%;animation:2.2s linear infinite rainbow-button-shift;box-shadow:0 18px 40px #5856d64d}.question-card.streak-tier-ruby .answer-form button{color:#fff;text-shadow:0 1px 2px #0000004d;background:linear-gradient(135deg,#fecdd3,#fb7185 42%,#be123c);box-shadow:0 18px 40px #fb71854d}.question-card.streak-tier-emerald .answer-form button{color:#022c22;background:linear-gradient(135deg,#d1fae5,#34d399 42%,#059669);box-shadow:0 18px 40px #34d3994d,inset 0 1px #ffffff9e}.feedback{min-height:24px;margin-top:18px;line-height:1.5}.side-panel{-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#070f1be0;border-left:1px solid #50739657;flex-direction:column;gap:14px;min-height:100vh;padding:24px;display:flex;overflow:auto}.mobile-menu-fab,.mobile-menu-backdrop,.side-panel-close,.side-panel-top-actions{display:none}.rank-panel,.control-panel{background:#0b1d30d1;border:1px solid #50739661;border-radius:8px;padding:18px;box-shadow:0 20px 50px #0000002e}.rank-panel{grid-template-columns:minmax(0,1fr) auto;gap:14px;display:grid}h2{color:#fff;margin-bottom:0;font-size:1.14rem;line-height:1.2}.rank-picture{color:var(--rank-accent);place-items:center;display:grid}.rank-picture-large{width:64px;height:64px}.rank-picture-small{width:38px;height:38px}.rank-picture svg{filter:drop-shadow(0 12px 22px #00000042);width:100%;height:100%;display:block;overflow:visible}.rank-picture .rank-picture-backplate{fill:color-mix(in srgb, var(--rank-accent) 28%, #07111f);stroke:color-mix(in srgb, var(--rank-accent) 70%, #fff);stroke-width:1.8px}.rank-picture path{fill:none;stroke:currentColor;stroke-width:4px;stroke-linecap:round;stroke-linejoin:round}.rank-ladder-panel{padding-bottom:12px}.rank-tab-button{color:#e9f8ff;background:#071827;border:1px solid #41d5ff6b;border-radius:8px;grid-column:1/-1;min-height:42px;padding:0 14px;font-size:.86rem;font-weight:950}.rank-tab-button:hover{background:#0d2b43;border-color:#41d5ff}.rank-ladder{gap:8px;margin:0;padding:0;list-style:none;display:grid}.rank-ladder li{background:#071827ad;border:1px solid #5073963d;border-radius:8px;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:10px;padding:8px;display:grid}.rank-ladder li.is-current{background:#0d2b43;border-color:#41d5ffbd}.rank-ladder span{color:#fff;gap:2px;font-size:.86rem;font-weight:900;display:grid}.rank-ladder small{color:#93aeca;font-size:.74rem;font-weight:800}.progress-track{background:#07111f;border-radius:999px;grid-column:1/-1;height:10px;overflow:hidden}.progress-track span{border-radius:inherit;background:linear-gradient(90deg,#41d5ff,#ffbe49);height:100%;transition:width .18s;display:block}.progress-copy{grid-column:1/-1;font-size:.9rem}.panel-heading{justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:14px;display:flex}.player-panel{gap:10px;display:grid}.player-panel label{gap:2px;display:grid}.player-panel strong{color:#fff;font-size:1.14rem;line-height:1.2}.player-panel input{color:#fff;background:#07111f;border:1px solid #a4b4c952;border-radius:8px;width:100%;min-height:46px;padding:0 13px;font-size:.96rem;font-weight:850}.player-panel input::placeholder{color:#728aa1}.admin-panel{gap:12px;display:grid}.admin-action-button,.admin-slider-row button{color:#160326;background:linear-gradient(135deg,#f5d0fe,#c084fc 46%,#7c3aed);border-radius:8px;min-height:44px;padding:0 14px;font-size:.9rem;font-weight:950;box-shadow:0 14px 30px #c084fc33}.admin-restore-button{width:100%;min-height:42px}.ghost-button:disabled{cursor:not-allowed;opacity:.48}.admin-slider-row{background:#071827;border:1px solid #5073965c;border-radius:8px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:8px 12px;padding:12px;display:grid}.admin-slider-row span{color:#93aeca;gap:3px;font-size:.76rem;font-weight:850;display:grid}.admin-slider-row strong{color:#fff;font-size:1.08rem;line-height:1}.admin-slider-row input{accent-color:#c084fc;grid-column:1/-1;width:100%;min-height:auto;padding:0}.difficulty-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.difficulty-button{color:#e9f8ff;text-align:left;background:#071827;border:1px solid #5073965c;border-radius:8px;justify-items:start;gap:5px;min-height:116px;padding:13px;display:grid}.difficulty-button:hover,.difficulty-button.is-active{background:#0d2b43;border-color:#41d5ff}.difficulty-button span{font-weight:950}.difficulty-button strong{color:#41d5ff;font-size:1.42rem;line-height:1}.difficulty-button small{color:#93aeca;font-size:.78rem}.difficulty-button em{color:#ffbe49;font-size:.78rem;font-style:normal;font-weight:950}.option-toggle{color:#e9f8ff;background:#071827;border:1px solid #5073965c;border-radius:8px;align-items:center;gap:12px;margin-top:12px;padding:12px;font-weight:900;display:flex}.option-toggle input{accent-color:#41d5ff;width:20px;height:20px;margin:0}.option-toggle:has(input:disabled){opacity:.72;cursor:not-allowed}.option-toggle span{gap:2px;display:grid}.option-toggle small{color:#93aeca;font-size:.78rem;font-weight:700}.stats-row{grid-template-columns:1fr 1fr;gap:12px;display:grid}.leaderboard-panel{gap:12px;display:grid}.leaderboard-state{color:#93aeca;text-align:center;text-transform:uppercase;border:1px solid #a4b4c93d;border-radius:7px;min-width:88px;padding:7px 9px;font-size:.7rem;font-weight:950}.leaderboard-state.is-unlocked{color:#41d5ff;border-color:#41d5ff8a}.leaderboard-grid{gap:12px;display:grid}.leaderboard-list{gap:8px;display:grid}.leaderboard-list h3{color:#f6fbff;margin:0;font-size:.9rem;line-height:1.15}.leaderboard-list ol{gap:6px;margin:0;padding:0;list-style:none;display:grid}.leaderboard-list li{background:#071827;border:1px solid #50739642;border-radius:8px;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:8px;min-height:36px;padding:7px 9px;display:grid}.leaderboard-list span{color:#41d5ff;background:#0d2b43;border-radius:6px;place-items:center;width:24px;height:24px;font-size:.72rem;font-weight:950;display:grid}.leaderboard-list strong{color:#fff;text-overflow:ellipsis;white-space:nowrap;font-size:.86rem;font-weight:900;overflow:hidden}.leaderboard-list em{color:#ffbe49;font-size:.78rem;font-style:normal;font-weight:950}.leaderboard-list p,.leaderboard-locked{color:#93aeca;margin:0;font-size:.84rem;line-height:1.35}.unlock-list{gap:9px;margin:0;padding:0;list-style:none;display:grid}.unlock-list li{background:#071827;border:1px solid #50739642;border-radius:8px}.unlock-list li.is-unlocked{background:#0d2b43;border-color:#41d5ff80}.upgrade-toggle-row{cursor:pointer;grid-template-columns:auto auto minmax(0,1fr);align-items:center;gap:2px 10px;min-height:58px;padding:10px 12px;display:grid}.upgrade-toggle-row input{accent-color:#41d5ff;grid-row:span 2;width:20px;height:20px;margin:0}.upgrade-toggle-row input:disabled,.unlock-list li:not(.is-unlocked) .upgrade-toggle-row{cursor:not-allowed}.unlock-list span{color:#93aeca;text-align:center;text-transform:uppercase;border:1px solid #a4b4c93d;border-radius:7px;grid-row:span 2;min-width:54px;padding:6px 8px;font-size:.7rem;font-weight:950}.unlock-list li.is-unlocked span{color:#41d5ff;border-color:#41d5ff8a}.unlock-list strong{color:#fff;font-size:.92rem}.unlock-list small{color:#93aeca;font-size:.78rem;font-weight:750}.stats-row strong{color:#fff;font-size:1.25rem}.reward-log{gap:10px;margin:0;padding:0;list-style:none;display:grid}.reward-log li{background:#071827;border:1px solid #50739642;border-radius:8px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:12px;min-height:54px;padding:10px 12px;display:grid}.reward-log span{color:#fff;gap:2px;font-weight:850;display:grid}.reward-log strong{color:#ffbe49}.reward-log em{color:#41d5ff;text-transform:uppercase;grid-column:2;font-size:.72rem;font-style:normal;font-weight:900}.empty-log{justify-content:flex-start;font-size:.9rem}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.floating-keyboard{right:max(14px, env(safe-area-inset-right));bottom:max(14px, env(safe-area-inset-bottom));z-index:20;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#07111ff0;border:1px solid #a4b4c957;border-radius:8px;width:min(360px,100vw - 28px);padding:12px;position:fixed;box-shadow:0 22px 60px #00000070,inset 0 1px #ffffff14}.floating-keyboard-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.floating-keyboard button{color:#f6fbff;touch-action:manipulation;background:#102033;border:1px solid #a4b4c933;border-radius:8px;min-height:48px;font-size:1.25rem;font-weight:950}.floating-keyboard button:active{transform:translateY(1px)}.floating-keyboard .keyboard-secondary{color:#93aeca;text-transform:uppercase;background:#071827;font-size:.82rem}.floating-keyboard-actions{grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:8px;margin-top:8px;display:grid}.floating-keyboard .keyboard-submit{color:#211101;background:linear-gradient(135deg,#ffbe49,#ff8f3d);font-size:.95rem}@keyframes rainbow-border-shift{0%{background-position:0%}to{background-position:200%}}@keyframes rainbow-button-shift{0%{background-position:0%}to{background-position:220%}}@media (width<=920px){.app-shell{grid-template-rows:minmax(0,58vh) minmax(0,42vh);grid-template-columns:1fr}.math-arena{min-height:0;padding:18px}.side-panel{border-top:1px solid #50739657;border-left:0;height:auto;min-height:auto}}@media (width<=620px){.app-shell{grid-template-rows:minmax(0,1fr)}.math-arena{height:100dvh;min-height:100dvh;padding:16px 16px 88px;display:block;overflow:auto}.arena-topbar,.answer-form{grid-template-columns:1fr}.arena-topbar{align-items:stretch}.topbar-actions{display:none}.difficulty-grid,.stats-row{grid-template-columns:1fr}.question-stage{gap:12px;padding:12px 0 18px}.score-strip{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;padding-top:34px}.score-tile{padding:10px}.score-tile.has-trophies{padding-top:13px}.score-trophy-row{gap:5px;top:-34px}.score-trophy{width:34px;height:34px}.score-trophy svg{width:25px;height:25px}.score-tile span,.panel-kicker{font-size:.65rem}.score-tile strong{font-size:1.25rem}.question-card{padding:18px}h1{font-size:clamp(3.6rem,20vw,5.2rem)}.equals-line{margin-bottom:16px;font-size:2rem}.answer-form input,.answer-form button{min-height:52px}.answer-form button{width:100%}.floating-keyboard{width:100%;margin-top:12px;padding:10px;position:static;box-shadow:0 16px 36px #00000047,inset 0 1px #ffffff14}.floating-keyboard button{min-height:44px;font-size:1.12rem}.floating-keyboard .keyboard-secondary,.floating-keyboard .keyboard-submit{font-size:.78rem}.mobile-menu-fab{top:max(16px, env(safe-area-inset-top));right:max(16px, env(safe-area-inset-right));z-index:31;color:#f6fbff;background:#0d2b43;border:1px solid #41d5ff8a;border-radius:8px;place-items:center;min-width:72px;min-height:54px;padding:0 16px;font-size:.9rem;font-weight:950;display:grid;position:fixed;box-shadow:0 18px 44px #00000061}.mobile-menu-backdrop{z-index:29;opacity:0;pointer-events:none;background:#03091294;transition:opacity .16s;display:block;position:fixed;inset:0}.mobile-menu-backdrop.is-open{opacity:1;pointer-events:auto}.side-panel-close{color:#e9f8ff;background:#071827;border:1px solid #a4b4c952;border-radius:8px;min-height:46px;font-size:.86rem;font-weight:950;display:block}.side-panel-top-actions{grid-template-columns:1fr 1fr;gap:10px;display:grid}.side-panel-top-actions .ghost-button{min-height:46px}.side-panel{z-index:30;width:min(390px,92vw);min-height:0;padding:max(18px, env(safe-area-inset-top)) 18px max(18px, env(safe-area-inset-bottom));border-top:0;border-left:1px solid #50739670;transition:transform .18s;position:fixed;top:0;bottom:0;right:0;transform:translate(104%)}.side-panel.is-mobile-open{transform:translate(0)}}
