:root{--bg:#0a0d16;--bg-elev:#10152a;--bg-card:#161d38;--bg-card-hover:#1c2547;--panel-hi:#262f56;--panel-lo:#0d1226;--border:#8ca0ff24;--border-strong:#8ca0ff52;--text:#eef0ff;--text-dim:#8d94bd;--accent:#8b6bff;--accent-2:#22e0c9;--accent-warn:#ffb648;--danger:#ff5c7c;--success:#22e0c9;--radius:16px;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--glass-border:#ffffff29;--glass-shine:linear-gradient(180deg, #ffffff1f, #fff0 55%);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}html{font-size:118%}@keyframes floatY{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}@keyframes cardEnter{0%{opacity:0;transform:translateY(14px)scale(.97)}to{opacity:1;transform:translateY(0)scale(1)}}@keyframes cardDeal{0%{opacity:0;transform:translateY(46px)rotate(-4deg)scale(.92)}to{opacity:1;transform:translateY(0)rotate(0)scale(1)}}@keyframes 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0 2px 5px #000000bf,inset 0 -1px #ffffff0d}.arena-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:28px;display:flex}.arena-title{letter-spacing:.02em;background:linear-gradient(90deg, var(--accent), var(--accent-2));color:#0000;cursor:pointer;filter:drop-shadow(0 1px #0009);-webkit-background-clip:text;background-clip:text;border:none;border-radius:8px;margin:0;padding:4px 6px;font-family:inherit;font-size:1.6rem;font-weight:800}.arena-title-logo{vertical-align:middle;width:auto;height:2.1em;margin-right:2px;transform:translateY(-2px)}.stat-pills{flex-wrap:wrap;gap:10px;display:flex}.pill{color:var(--text-dim);border-radius:999px;align-items:center;gap:7px;padding:8px 16px;font-size:.95rem;display:flex}.pill b{color:var(--accent-2);text-shadow:0 0 8px #22e0c980;font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace}.xp-bar-track{border-radius:999px;width:120px;height:7px}.xp-bar-fill{background:linear-gradient(180deg, #b9ffef 0%, var(--accent-2) 55%, #0f8f80 100%);height:100%;box-shadow:0 0 8px var(--accent-2);border-radius:999px}.pill,.xp-bar-track,.progress-track,.difficulty-badge{background:linear-gradient(#04060c 0%,#090d18 100%);border:1px solid #0009;box-shadow:inset 0 2px 5px #000000bf,inset 0 -1px #ffffff0d}.btn{background:linear-gradient(180deg, var(--panel-hi) 0%, var(--bg-card) 100%);color:var(--text);border:1px solid #ffffff1a;border-bottom:3px solid #0000008c;border-radius:10px;padding:12px 20px;font-size:1.05rem;font-weight:600;transition:transform 80ms,box-shadow 80ms,border-color .15s,background .15s;transform:translateY(0);box-shadow:inset 0 1px #ffffff29,0 3px 6px #00000059}.btn:hover{background:linear-gradient(180deg, var(--bg-card-hover) 0%, var(--bg-card) 100%);border-color:color-mix(in srgb, var(--accent) 60%, #ffffff1a)}.btn:active{border-bottom-width:1px;transform:translateY(2px);box-shadow:inset 0 1px 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28px;transition:transform .1s,box-shadow .15s;display:flex;position:relative;overflow:hidden;transform:translateY(0);box-shadow:inset 0 1px 1px #ffffff59,0 16px 34px -10px #8b6bff8c}.hero-action:before{content:"";border-radius:inherit;background:var(--glass-shine);pointer-events:none;position:absolute;inset:0}.hero-action:after{content:"";pointer-events:none;background:radial-gradient(circle,#ffffff59 0%,#0000 70%);width:220px;height:220px;position:absolute;inset:-60% -10% auto auto}.hero-action>*{position:relative}.hero-action:hover{transform:translateY(-2px);box-shadow:inset 0 1px 1px #ffffff59,0 20px 40px -10px #8b6bffa6}.hero-action:active{transform:translateY(2px);box-shadow:inset 0 1px 1px #fff3,0 8px 18px -8px #8b6bff80}.hero-action .hero-icon{filter:drop-shadow(0 4px 8px #00000059);font-size:2.6rem;animation:2.4s ease-in-out infinite floatY}.hero-action .hero-name{letter-spacing:.01em;font-size:1.45rem;font-weight:800;display:block}.hero-action .hero-desc{color:#ffffffd9;margin-top:2px;font-size:1rem;display:block}.secondary-actions{grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;margin-bottom:32px;display:grid}.action-card{--cat-color:var(--accent);background:radial-gradient(circle at 88% -14%, color-mix(in srgb, var(--cat-color) 50%, transparent) 0%, transparent 62%), linear-gradient(160deg, color-mix(in srgb, var(--cat-color) 22%, #ffffff0d) 0%, #ffffff05 100%);-webkit-backdrop-filter:blur(18px)saturate(170%);backdrop-filter:blur(18px)saturate(170%);border:1px solid var(--glass-border);border-bottom:4px solid var(--cat-color);border-radius:var(--radius);text-align:left;color:var(--text);padding:22px;transition:transform 80ms,box-shadow .15s,border-color .15s;position:relative;overflow:hidden;transform:translateY(0);box-shadow:inset 0 1px 1px #ffffff1a,0 10px 22px -8px 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transparent);transform:scale(1.08)rotate(-3deg)}.action-card .action-name{font-size:1.1rem;font-weight:700;display:block}.action-card .action-desc{color:var(--text-dim);font-size:.92rem}.pix-slot{pointer-events:none;justify-content:center;align-items:center;display:flex}.pix-avatar{object-fit:contain;opacity:.9;filter:drop-shadow(0 10px 16px #00000080);-webkit-user-select:none;user-select:none;width:auto;max-height:132px;animation:3.2s ease-in-out infinite floatY}.section-title{text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);margin:0 0 12px;font-size:.9rem;font-weight:700}.category-grid{grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;margin-bottom:32px;display:grid}.category-card{--cat-color:var(--accent);background:radial-gradient(circle at 88% -14%, color-mix(in srgb, var(--cat-color) 60%, transparent) 0%, transparent 62%), linear-gradient(160deg, color-mix(in srgb, var(--cat-color) 26%, #ffffff0d) 0%, #ffffff05 100%);border-bottom:4px solid var(--cat-color);-webkit-backdrop-filter:blur(18px)saturate(160%);backdrop-filter:blur(18px)saturate(160%);border:1px solid var(--glass-border);border-radius:var(--radius);text-align:left;color:var(--text);padding:16px;transition:transform .12s,box-shadow .15s,border-color .15s;position:relative;overflow:hidden;transform:translateY(0);box-shadow:inset 0 1px 1px #ffffff1a,0 10px 22px -8px #0000008c}.category-card:before{content:"";border-radius:inherit;background:var(--glass-shine);pointer-events:none;position:absolute;inset:0}.category-card>*{position:relative}.category-card:hover{border-color:color-mix(in srgb, var(--cat-color) 55%, #ffffff14);transform:translateY(-3px)}.category-card:hover .icon-badge{animation:1.6s ease-in-out infinite floatY}.category-card:active{transform:translateY(2px);box-shadow:inset 0 1px #ffffff14,0 4px 10px -4px #00000080}.category-card .cat-name{margin-top:6px;font-size:1.1rem;font-weight:700;display:block}.category-card .cat-meta{color:var(--text-dim);margin-top:4px;font-size:.88rem}.progress-track{border-radius:999px;width:100%;height:7px;margin-top:10px;overflow:hidden}.progress-fill{background:linear-gradient(180deg, color-mix(in srgb, var(--cat-color,var(--accent-2)) 60%, white) 0%, var(--cat-color,var(--accent-2)) 55%, color-mix(in srgb, var(--cat-color,var(--accent-2)) 70%, black) 100%);height:100%;box-shadow:0 0 8px var(--cat-color,var(--accent-2));border-radius:999px}.card{--cat-color:var(--accent);background:linear-gradient(160deg, color-mix(in srgb, var(--cat-color) 30%, #ffffff0f) 0%, #ffffff0a 60%);-webkit-backdrop-filter:blur(22px)saturate(170%);backdrop-filter:blur(22px)saturate(170%);border:1px solid var(--glass-border);border-top:6px solid var(--cat-color);border-radius:var(--radius);padding:26px;animation:.4s cubic-bezier(.2,.8,.3,1.1) both cardDeal;position:relative;overflow:hidden;box-shadow:inset 0 1px 1px #ffffff1f,0 14px 30px -10px #0009}.card:before{content:"";border-radius:inherit;background:var(--glass-shine);pointer-events:none;position:absolute;inset:0}.card:after{content:"";background:radial-gradient(circle, var(--cat-color) 0%, transparent 72%);opacity:.32;filter:blur(6px);pointer-events:none;height:230px;position:absolute;inset:-45% -15% auto}.card>*{position:relative}.challenge-header{color:var(--text-dim);justify-content:space-between;align-items:center;margin-bottom:18px;font-size:1rem;display:flex;position:relative}.challenge-header-left{align-items:center;gap:10px;display:flex}.challenge-header-left .icon-badge{width:34px;height:34px;margin-bottom:0;font-size:1rem}.difficulty-meter{background:linear-gradient(#04060c 0%,#090d18 100%);border:1px solid #0009;border-radius:999px;align-items:center;gap:4px;padding:5px 10px;display:flex;box-shadow:inset 0 2px 5px #000000bf,inset 0 -1px #ffffff0d}.diff-dot{background:#ffffff1f;border-radius:50%;width:6px;height:6px;transition:background .15s,box-shadow .15s}.diff-dot.filled{background:var(--cat-color);box-shadow:0 0 6px var(--cat-color)}.challenge-prompt{white-space:pre-wrap;margin:6px 0 22px;font-size:1.5rem;font-weight:600;line-height:1.6;position:relative}.challenge-prompt.mono{letter-spacing:.03em;font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace;font-size:1.3rem}.memorize-cards{flex-wrap:wrap;justify-content:center;gap:12px;padding:20px 0;display:flex}.memorize-card{--cat-color:var(--accent-2);text-align:center;min-width:56px;color:var(--text);background:linear-gradient(160deg, color-mix(in srgb, var(--cat-color) 35%, #ffffff14) 0%, #ffffff08 100%);border:2px solid var(--cat-color);box-shadow:0 6px 16px -4px color-mix(in srgb, var(--cat-color) 55%, transparent);text-shadow:0 0 14px color-mix(in srgb, var(--cat-color) 70%, transparent);animation:.4s cubic-bezier(.2,.8,.3,1.1) both dealChoice;animation-delay:calc(var(--i,0) * 90ms);border-radius:12px;padding:16px 14px;font-size:1.7rem;font-weight:700}.memorize-timer{text-align:center;color:var(--text-dim);margin-top:4px;font-size:1rem}.answer-row{gap:10px;margin-bottom:16px;display:flex}.answer-input{min-width:0;color:var(--text);background:linear-gradient(#04060c 0%,#090d18 100%);border:1px solid #0009;border-radius:10px;flex:1;padding:15px 16px;font-size:1.15rem;box-shadow:inset 0 2px 5px #000000bf,inset 0 -1px #ffffff0d}.answer-input:focus{border-color:var(--accent-2);outline:none;box-shadow:inset 0 2px 5px #000000bf,0 0 0 3px #22e0c92e}.choice-grid{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:16px;display:grid}.choice-btn{--opt-color:var(--accent);text-align:center;border-top:5px solid var(--opt-color);box-shadow:0 1px 0 #ffffff29 inset, 0 8px 18px -6px color-mix(in srgb, var(--opt-color) 45%, transparent);animation:.36s cubic-bezier(.2,.8,.3,1.1) both dealChoice;animation-delay:calc(var(--i,0) * 60ms);border-radius:16px;padding:26px 12px 20px;font-size:2.3rem}.choice-btn:hover{border-color:color-mix(in srgb, var(--opt-color) 65%, #ffffff1a);box-shadow:0 1px 0 #ffffff29 inset, 0 10px 22px -6px color-mix(in srgb, var(--opt-color) 60%, transparent)}.choice-btn:active{transform:translateY(2px)scale(.97)}.choice-btn:nth-child(4n+1){--opt-color:#8b6bff}.choice-btn:nth-child(4n+2){--opt-color:#22e0c9}.choice-btn:nth-child(4n+3){--opt-color:#ffb648}.choice-btn:nth-child(4n+4){--opt-color:#ff5c9d}.hint-box{color:var(--accent-warn);background:linear-gradient(160deg,#ffb64829 0%,#ffb6480f 100%);border:1px solid #ffb64859;border-radius:10px;margin-bottom:12px;padding:12px 16px;font-size:1.05rem;box-shadow:inset 0 1px #ffffff14}.feedback-box{border-radius:var(--radius);margin-top:16px;padding:20px;position:relative;overflow:visible}.feedback-box.correct{background:linear-gradient(160deg,#22e0c93d 0%,#22e0c912 100%);border:1px solid #22e0c973;animation:.4s popCelebrate;box-shadow:inset 0 1px #ffffff14}.feedback-box.incorrect{background:linear-gradient(160deg,#ff5c7c33 0%,#ff5c7c0f 100%);border:1px solid #ff5c7c66;animation:.45s shakeX;box-shadow:inset 0 1px #ffffff14}.feedback-title{margin-bottom:6px;font-size:1.3rem;font-weight:800}.sparkle-particle{pointer-events:none;font-size:1.4rem;animation:.8s ease-out both sparkle;position:absolute;top:10px}.feedback-title.correct{color:var(--success);text-shadow:0 0 10px #22e0c966}.feedback-title.incorrect{color:var(--danger);text-shadow:0 0 10px #ff5c7c66}.xp-toast{color:var(--accent-2);text-shadow:0 0 8px #22e0c980;font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace;font-size:1.05rem;font-weight:700}.achievement-banner{border:1px solid var(--border-strong);background:linear-gradient(160deg,#8b6bff38 0%,#22e0c91f 100%);border-radius:10px;margin-top:12px;padding:10px 14px;font-size:.9rem;box-shadow:inset 0 1px #ffffff1a}.save-warning-banner{border:1px solid color-mix(in srgb, var(--danger) 45%, transparent);color:var(--text);background:linear-gradient(160deg,#ff5c7c38 0%,#ff5c7c14 100%);border-radius:10px;margin-bottom:16px;padding:10px 14px;font-size:.85rem;box-shadow:inset 0 1px #ffffff1a}.profile-grid{grid-template-columns:1fr;gap:24px;display:grid}@media (width>=720px){.profile-grid{grid-template-columns:1fr 1fr}}.radar-caption{color:var(--text-dim);margin-top:8px;font-size:.78rem}.achievement-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;display:grid}.achievement-item{background:linear-gradient(160deg, var(--panel-hi) 0%, var(--panel-lo) 100%);text-align:center;color:var(--text-dim);border:1px solid #ffffff0f;border-radius:10px;padding:12px;font-size:.78rem;box-shadow:inset 0 1px #ffffff1a,0 4px 10px -4px #00000080}.achievement-item.unlocked{color:var(--text);border-color:color-mix(in srgb, var(--accent) 55%, transparent);box-shadow:inset 0 1px #ffffff24,0 0 14px #8b6bff40,0 4px 10px -4px #00000080}.achievement-item .a-icon{filter:grayscale();opacity:.4;margin-bottom:4px;font-size:1.5rem;display:block}.achievement-item.unlocked .a-icon{filter:none;opacity:1;text-shadow:0 0 10px #8b6bff99}.report-grid{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin:16px 0;display:grid}.report-stat{background:linear-gradient(#04060c 0%,#090d18 100%);border:1px solid #0009;border-radius:10px;padding:14px;box-shadow:inset 0 2px 5px #000000bf,inset 0 -1px #ffffff0d}.report-stat .label{color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em;font-size:.75rem}.report-stat .value{color:var(--accent-2);text-shadow:0 0 10px #22e0c973;margin-top:4px;font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace;font-size:1.4rem;font-weight:800}.back-link{color:var(--text-dim);background:0 0;border:none;align-items:center;gap:4px;margin-bottom:16px;padding:0;font-size:1.05rem;font-weight:600;display:inline-flex}.back-link:hover{color:var(--text)}.duration-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;display:grid}.sudoku-board{background:#00000080;border-radius:14px;gap:5px;margin:8px auto 20px;padding:10px;display:inline-grid;box-shadow:inset 0 2px 6px #0009}.sudoku-row{gap:3px;display:flex}.sudoku-cell{text-align:center;width:clamp(42px,8vw,78px);height:clamp(42px,8vw,78px);color:var(--text);background:linear-gradient(#1b2140 0%,#12172c 100%);border:none;border-radius:8px;font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace;font-size:clamp(1.2rem,2.8vw,1.9rem);font-weight:700;box-shadow:inset 0 1px #ffffff14}.sudoku-cell.given{color:var(--cat-color,var(--accent-2));background:linear-gradient(#04060c 0%,#090d18 100%);box-shadow:inset 0 2px 4px #000000b3}.sudoku-cell:not(.given):focus{box-shadow:0 0 0 2px var(--cat-color,var(--accent-2));outline:none}.sudoku-cell.box-edge-right{margin-right:4px}.sudoku-row.box-edge-bottom{margin-bottom:4px}.diff-boards{flex-wrap:wrap;justify-content:center;gap:20px;margin:8px 0 20px;display:flex}.diff-board{text-align:center}.diff-board .diff-label{color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px;font-size:.75rem;display:block}.diff-grid{background:#00000059;border-radius:12px;gap:4px;padding:8px;display:inline-grid}.diff-row{gap:4px;display:flex}.diff-cell-btn{box-sizing:border-box;cursor:pointer;background:linear-gradient(#1b2140 0%,#12172c 100%);border:1px solid #ffffff0f;border-radius:8px;justify-content:center;align-items:center;width:clamp(40px,8vw,78px);height:clamp(40px,8vw,78px);padding:0;font-size:clamp(1.2rem,2.6vw,1.9rem);transition:transform 80ms,box-shadow .15s;display:flex}.diff-cell-btn:hover{transform:scale(1.08)}.diff-cell-btn.marked{box-shadow:0 0 0 2px var(--accent-2), 0 0 10px #22e0c980}.letter-grid{grid-template-columns:repeat(var(--grid-size), minmax(0, 1fr));width:min(100%, calc(var(--grid-size) * 48px));-webkit-backdrop-filter:blur(18px)saturate(160%);backdrop-filter:blur(18px)saturate(160%);border:1px solid var(--glass-border);background:linear-gradient(160deg,#ffffff12 0%,#ffffff05 100%);border-radius:12px;gap:4px;margin:4px auto 18px;padding:8px;display:grid;position:relative;overflow:hidden;box-shadow:inset 0 1px 1px #ffffff1a,0 10px 22px -8px #0000008c}.letter-grid:before{content:"";border-radius:inherit;background:var(--glass-shine);pointer-events:none;position:absolute;inset:0}.letter-cell{aspect-ratio:1;background:linear-gradient(160deg, color-mix(in srgb, var(--cat-color) 32%, #ffffff1a) 0%, color-mix(in srgb, var(--cat-color) 14%, #ffffff08) 100%);border:1px solid color-mix(in srgb, var(--cat-color) 45%, 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#0006}.novelty-text{flex:1;min-width:0}.novelty-name{margin-bottom:2px;font-weight:700;display:block}.novelty-desc{color:var(--text-dim);font-size:.82rem}.arcade-shell{--arcade-void-1:#05060a;--arcade-void-3:#0f1424;--arcade-ghost:#eaf6ff;--arcade-ghost-dim:#9fb0d1;--arcade-cyan:#00f0ff;--arcade-magenta:#ff2ee6;--arcade-lime:#c6ff3d;--arcade-violet:#8a5cff}.arcade-arena{background:radial-gradient(900px 600px at 50% -20%, var(--arcade-void-3), transparent 60%), var(--arcade-void-1);border-radius:var(--radius);width:100%;max-width:640px;height:min(78vh,760px);color:var(--arcade-ghost);border:1px solid #ffffff14;flex-direction:column;margin:0 auto;display:flex;position:relative;overflow:hidden;box-shadow:0 20px 50px -20px #000000b3}@media (width<=680px){.arcade-arena{border-left:none;border-right:none;border-radius:0;width:100vw;max-width:100vw;height:calc(100dvh - 132px);margin-left:calc(50% - 50vw);margin-right:calc(50% - 50vw)}}.arcade-arena.arcade-shake{animation:.3s 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#c6ff3d66}.arcade-combo-tag.show{opacity:1;transform:translate(-50%)scale(1)}.arcade-field{touch-action:none;cursor:none;flex:1;position:relative;overflow:hidden}.arcade-mota{pointer-events:none;will-change:transform;border-radius:50%;width:18px;height:18px;position:absolute}.arcade-mota.arcade-pop{animation:.26s forwards arcadeMotaPop}@keyframes arcadeMotaPop{0%{opacity:1;transform:scale(1)}60%{opacity:.7;transform:scale(1.7)}to{opacity:0;transform:scale(.2)}}.arcade-player{pointer-events:none;will-change:transform;width:34px;height:34px;margin:-17px 0 0 -17px;position:absolute}.arcade-player-ring{position:absolute;inset:-8px;transform:rotate(-90deg)}.arcade-player-ring circle{fill:none}.arcade-player-ring-bg{stroke:#ffffff1a;stroke-width:3px}.arcade-player-ring-fg{stroke-width:3px;stroke-linecap:round;transition:stroke-dashoffset .12s linear}.arcade-player-core{border-radius:50%;transition:background .25s,box-shadow 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arcadeFlashPulse{0%{opacity:.5}to{opacity:0}}.arcade-overlay{z-index:5;text-align:center;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#05060ae0;flex-direction:column;justify-content:center;align-items:center;gap:14px;padding:24px;display:flex;position:absolute;inset:0}.arcade-title-lg{letter-spacing:.03em;color:var(--arcade-lime);text-shadow:0 0 22px #c6ff3d80,0 0 50px #8a5cff4d;margin:0;font-size:1.9rem;font-weight:800}.arcade-subtitle{color:var(--arcade-ghost-dim);max-width:300px;margin:-4px 0 4px;font-size:.9rem}.arcade-stat-row{gap:22px;display:flex}.arcade-stat{text-align:center}.arcade-stat .n{font-variant-numeric:tabular-nums;font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace;font-size:1.4rem;font-weight:800}.arcade-stat .l{letter-spacing:.1em;text-transform:uppercase;color:var(--arcade-ghost-dim);font-size:.58rem}.arcade-hint{text-align:center;color:var(--text-dim);margin:10px 0 0;font-size:.74rem}