: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;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}@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 popCelebrate{0%{transform:scale(.92)}55%{transform:scale(1.035)}to{transform:scale(1)}}@keyframes shakeX{0%,to{transform:translate(0)}20%{transform:translate(-7px)}40%{transform:translate(7px)}60%{transform:translate(-5px)}80%{transform:translate(5px)}}@keyframes sparkle{0%{opacity:1;transform:scale(0)rotate(0)}to{opacity:0;transform:scale(1.4)rotate(60deg)}}html,body,#root{height:100%}body{background:radial-gradient(circle at 20% -10%, #1b2352 0%, var(--bg) 45%) fixed, repeating-linear-gradient(115deg, #ffffff03 0px, #ffffff03 1px, transparent 1px, transparent 3px) fixed;color:var(--text);margin:0}#root{min-height:100vh}button{cursor:pointer;font-family:inherit}input{font-family:inherit}.mono{font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace}.app-shell{max-width:960px;margin:0 auto;padding:24px 20px 64px}.panel-3d{background:linear-gradient(160deg, var(--panel-hi) 0%, var(--bg-card) 45%, var(--panel-lo) 100%);border:1px solid #ffffff14;box-shadow:inset 0 1px #ffffff24,inset 0 -14px 22px -14px #0000008c,0 10px 22px -6px #0000008c,0 1px #0006}.readout{background:linear-gradient(#04060c 0%,#090d18 100%);border:1px solid #0009;box-shadow:inset 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;margin:0;font-size:1.6rem;font-weight:800}.stat-pills{flex-wrap:wrap;gap:10px;display:flex}.pill{color:var(--text-dim);border-radius:999px;align-items:center;gap:7px;padding:7px 14px;font-size:.85rem;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:10px 18px;font-size:.95rem;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 #ffffff0f}.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}.btn-primary{background:linear-gradient(180deg, #a58bff 0%, var(--accent) 55%, #6a4fe0 100%);color:#fff;text-shadow:0 1px 1px #00000059;border:1px solid #ffffff40;border-bottom:3px solid #4b35a8}.btn-primary:hover{filter:brightness(1.08)}.btn-primary:active{border-bottom-width:1px}.btn-ghost{border:1px solid var(--border);border-bottom:1px solid var(--border);color:var(--text-dim);box-shadow:none;background:0 0}.btn-ghost:hover{color:var(--text);border-color:var(--border-strong);background:#ffffff08}.btn-ghost:active{transform:translateY(1px)}.btn-row{flex-wrap:wrap;gap:10px;display:flex}.hero-action{text-align:left;color:#fff;background:linear-gradient(135deg, #a58bff 0%, var(--accent) 45%, #5a3fd0 100%);border:1px solid #ffffff47;border-radius:20px;align-items:center;gap:20px;width:100%;margin-bottom:14px;padding:26px 28px;transition:transform .1s,box-shadow .15s;display:flex;position:relative;overflow:hidden;transform:translateY(0);box-shadow:inset 0 1px #ffffff4d,0 16px 34px -10px #8b6bff8c,0 4px #4b35a8cc}.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:hover{transform:translateY(-2px);box-shadow:inset 0 1px #ffffff4d,0 20px 40px -10px #8b6bffa6,0 4px #4b35a8cc}.hero-action:active{transform:translateY(2px);box-shadow:inset 0 1px #fff3,0 8px 18px -8px #8b6bff80,0 1px #4b35a8cc}.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:1.3rem;font-weight:800;display:block}.hero-action .hero-desc{color:#ffffffd9;margin-top:2px;font-size:.9rem;display:block}.secondary-actions{grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:32px;display:grid}.action-card{background:linear-gradient(160deg, var(--panel-hi) 0%, var(--bg-card) 45%, var(--panel-lo) 100%);border-radius:var(--radius);text-align:left;color:var(--text);border:1px solid #ffffff14;padding:18px;transition:transform 80ms,box-shadow .15s,border-color .15s;transform:translateY(0);box-shadow:inset 0 1px #ffffff24,0 10px 22px -8px #0000008c,0 1px #0006}.action-card:hover{border-color:color-mix(in srgb, var(--accent-2) 50%, #ffffff14);transform:translateY(-2px)}.action-card:active{transform:translateY(2px);box-shadow:inset 0 1px #ffffff14,0 4px 10px -4px #00000080}.icon-badge{--icon-color:var(--accent);background:radial-gradient(circle at 32% 28%, color-mix(in srgb, var(--icon-color) 55%, white) 0%, var(--icon-color) 42%, color-mix(in srgb, var(--icon-color) 55%, black) 100%);border:1px solid color-mix(in srgb, var(--icon-color) 65%, black);width:44px;height:44px;box-shadow:0 2px 5px #00000080, 0 0 16px color-mix(in srgb, var(--icon-color) 40%, transparent), inset 0 1px 0 #fff6, inset 0 -4px 6px color-mix(in srgb, var(--icon-color) 55%, black);border-radius:13px;justify-content:center;align-items:center;margin-bottom:10px;font-size:1.25rem;transition:transform .15s,box-shadow .15s;display:inline-flex}.action-card:hover .icon-badge,.category-card:hover .icon-badge{box-shadow:0 2px 6px #00000080, 0 0 22px color-mix(in srgb, var(--icon-color) 55%, transparent), inset 0 1px 0 #ffffff73, inset 0 -4px 6px color-mix(in srgb, var(--icon-color) 55%, black);transform:scale(1.06)}.action-card .action-name{font-weight:700;display:block}.action-card .action-desc{color:var(--text-dim);font-size:.82rem}.section-title{text-transform:uppercase;letter-spacing:.08em;color:var(--text-dim);margin:0 0 12px;font-size:.8rem}.category-grid{grid-template-columns:repeat(auto-fit,minmax(150px,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) 38%, transparent) 0%, transparent 62%), linear-gradient(160deg, var(--panel-hi) 0%, var(--bg-card) 45%, var(--panel-lo) 100%);border-radius:var(--radius);text-align:left;color:var(--text);border:1px solid #ffffff14;padding:16px;transition:transform .12s,box-shadow .15s,border-color .15s;position:relative;overflow:hidden;transform:translateY(0);box-shadow:inset 0 1px #ffffff24,0 10px 22px -8px #0000008c,0 1px #0006}.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-weight:700;display:block}.category-card .cat-meta{color:var(--text-dim);margin-top:4px;font-size:.78rem}.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, var(--panel-hi) 0%, var(--bg-card) 45%, var(--panel-lo) 100%);border-radius:var(--radius);border:1px solid #ffffff14;padding:26px;animation:.28s both cardEnter;position:relative;overflow:hidden;box-shadow:inset 0 1px #ffffff24,inset 0 -18px 30px -20px #0000008c,0 14px 30px -10px #0009}.card:before{content:"";background:radial-gradient(circle, var(--cat-color) 0%, transparent 72%);opacity:.28;filter:blur(6px);pointer-events:none;height:230px;position:absolute;inset:-45% -15% auto}.challenge-header{color:var(--text-dim);justify-content:space-between;align-items:center;margin-bottom:18px;font-size:.85rem;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:1.3rem;font-weight:500;line-height:1.65;position:relative}.challenge-prompt.mono{letter-spacing:.03em;font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace;font-size:1.1rem}.memorize-grid{letter-spacing:.3em;text-align:center;color:var(--accent-2);text-shadow:0 0 14px #22e0c98c;padding:24px 0;font-size:1.6rem}.memorize-timer{text-align:center;color:var(--text-dim);margin-top:4px;font-size:.85rem}.answer-row{gap:10px;margin-bottom:16px;display:flex}.answer-input{color:var(--text);background:linear-gradient(#04060c 0%,#090d18 100%);border:1px solid #0009;border-radius:10px;flex:1;padding:12px 14px;font-size:1rem;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(90px,1fr));gap:12px;margin-bottom:16px;display:grid}.choice-btn{text-align:center;border-radius:16px;padding:22px 10px;font-size:2.1rem}.choice-btn:nth-child(4n+1):hover{border-color:#8b6bff;box-shadow:inset 0 1px #ffffff29,0 3px 6px #00000059,0 0 16px #8b6bff59}.choice-btn:nth-child(4n+2):hover{border-color:#22e0c9;box-shadow:inset 0 1px #ffffff29,0 3px 6px #00000059,0 0 16px #22e0c959}.choice-btn:nth-child(4n+3):hover{border-color:#ffb648;box-shadow:inset 0 1px #ffffff29,0 3px 6px #00000059,0 0 16px #ffb64859}.choice-btn:nth-child(4n+4):hover{border-color:#ff5c9d;box-shadow:inset 0 1px #ffffff29,0 3px 6px #00000059,0 0 16px #ff5c9d59}.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:10px 14px;font-size:.9rem;box-shadow:inset 0 1px #ffffff14}.feedback-box{border-radius:var(--radius);margin-top:16px;padding:18px}.feedback-box.correct{background:linear-gradient(160deg,#22e0c929 0%,#22e0c90d 100%);border:1px solid #22e0c959;animation:.35s popCelebrate;box-shadow:inset 0 1px #ffffff14}.feedback-box.incorrect{background:linear-gradient(160deg,#ff5c7c29 0%,#ff5c7c0d 100%);border:1px solid #ff5c7c59;animation:.4s shakeX;box-shadow:inset 0 1px #ffffff14}.feedback-title{margin-bottom:6px;font-size:1.05rem;font-weight:800}.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:.9rem;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}.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:.85rem;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:12px;gap:3px;margin:8px auto 20px;padding:6px;display:inline-grid;box-shadow:inset 0 2px 6px #0009}.sudoku-row{gap:3px;display:flex}.sudoku-cell{text-align:center;width:40px;height:40px;color:var(--text);background:linear-gradient(#1b2140 0%,#12172c 100%);border:none;border-radius:6px;font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace;font-size:1.1rem;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{cursor:pointer;background:linear-gradient(#1b2140 0%,#12172c 100%);border:1px solid #ffffff0f;border-radius:7px;justify-content:center;align-items:center;width:34px;height:34px;font-size:1.05rem;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{background:#00000059;border-radius:12px;gap:4px;margin:4px auto 18px;padding:8px;display:inline-grid}.letter-cell{background:radial-gradient(circle at 32% 28%, color-mix(in srgb, var(--cat-color) 35%, white) 0%, color-mix(in srgb, var(--cat-color) 22%, var(--bg-elev)) 60%, var(--bg-elev) 100%);border:1px solid color-mix(in srgb, var(--cat-color) 40%, transparent);color:var(--text);border-radius:7px;justify-content:center;align-items:center;font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace;font-size:1rem;font-weight:800;display:flex}.word-flash{margin:-6px 0 12px;font-size:.85rem;font-weight:700}.word-flash.ok{color:var(--success)}.word-flash.bad{color:var(--danger)}.found-words{flex-wrap:wrap;gap:6px;min-height:30px;display:flex}.memory-grid{gap:8px;margin:4px auto 14px;display:inline-grid}.memory-card{cursor:pointer;background:linear-gradient(155deg, color-mix(in srgb, var(--cat-color) 75%, white) 0%, var(--cat-color) 55%, color-mix(in srgb, var(--cat-color) 65%, black) 100%);box-shadow:0 2px 4px #00000073, inset 0 1px 0 #ffffff59, inset 0 -4px 6px color-mix(in srgb, var(--cat-color) 55%, black);border:none;border-radius:12px;justify-content:center;align-items:center;padding:0;transition:transform .12s;display:flex}.memory-card:hover:not(.up){transform:scale(1.04)}.memory-card:active:not(.up){transform:scale(.96)}.memory-card.up{box-shadow:0 2px 4px #0006, inset 0 1px 0 #fff9, 0 0 0 2px color-mix(in srgb, var(--cat-color) 55%, transparent);background:radial-gradient(circle at 35% 25%,#fff 0%,#f2f2f7 70%,#e7e7ee 100%);animation:.2s popCelebrate}.memory-card.matched{opacity:.55;box-shadow:0 0 0 2px var(--success), 0 0 14px #22e0c966}.memory-card-back{background:#ffffff4d;border-radius:50%;width:40%;height:40%;box-shadow:inset 0 2px 3px #00000040}.word-chip{background:color-mix(in srgb, var(--cat-color) 18%, transparent);border:1px solid color-mix(in srgb, var(--cat-color) 50%, transparent);color:var(--text);border-radius:999px;padding:4px 12px;font-family:SFMono-Regular,ui-monospace,Menlo,Consolas,monospace;font-size:.8rem;font-weight:700;animation:.25s popCelebrate}