:root{--bg-primary:#0a0a1a;--bg-secondary:#12122a;--bg-tertiary:#1a1a3e;--bg-card:#1a1a3ee6;--accent-primary:#7c3aed;--accent-secondary:#06b6d4;--accent-gradient:linear-gradient(135deg, #7c3aed, #06b6d4);--accent-gradient-hover:linear-gradient(135deg, #6d28d9, #0891b2);--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--border:#7c3aed33;--border-hover:#7c3aed80;--shadow-glow:0 0 20px #7c3aed4d;--shadow-card:0 4px 24px #0006;--radius-sm:8px;--radius-md:12px;--radius-lg:20px;--radius-full:9999px;--transition:.3s cubic-bezier(.4, 0, .2, 1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}@media (min-width:769px){html{font-size:18px}}body{background:var(--bg-primary);color:var(--text-primary);min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe 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28px;font-size:1rem;font-weight:600;display:inline-flex;position:relative;overflow:hidden}.btn:active{transform:scale(.96)}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:0 4px 15px #7c3aed66}.btn-primary:hover{background:var(--accent-gradient-hover);transform:translateY(-2px);box-shadow:0 6px 25px #7c3aed99}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{border-color:var(--border-hover);box-shadow:var(--shadow-glow);transform:translateY(-2px)}.btn-ghost{color:var(--text-secondary);padding:8px 16px}.btn-ghost:hover{color:var(--text-primary);background:#ffffff0d}.btn-danger{color:var(--danger);background:#ef444426;border:1px solid #ef44444d}.btn-danger:hover{background:#ef444440}.btn-sm{padding:8px 18px;font-size:.875rem}.btn-lg{padding:16px 36px;font-size:1.125rem}.btn-icon{border-radius:var(--radius-md);padding:10px}.card{background:var(--bg-card);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border:1px solid var(--border);border-radius:var(--radius-lg);transition:all var(--transition);padding:16px}.card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-glow);transform:translateY(-4px)}.glass{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--border);border-radius:var(--radius-lg);background:#12122a99}.modal-overlay{z-index:100;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#000000b3;justify-content:center;align-items:center;padding:20px;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.modal-content{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);text-align:center;width:100%;max-width:480px;max-height:90vh;padding:24px;animation:.3s slideUp;overflow-y:auto}.modal-content.skip-ad-modal{justify-content:center;align-items:center;max-width:400px;height:400px;margin:auto;padding:0;display:flex;position:relative;overflow:hidden}.skip-ad-modal .ad-wrapper{background:#0003;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;padding:20px;display:flex}@media (max-width:480px){.modal-content{padding:20px}.modal-content.skip-ad-modal{border:none;border-radius:0;width:100vw;max-width:100vw;height:100vh;max-height:100vh;margin:0}}.level-btn{width:56px;height:56px;transition:all var(--transition);border-radius:50%;flex-direction:column;justify-content:center;align-items:center;font-size:1rem;font-weight:700;display:flex;position:relative}.level-btn.unlocked{background:var(--bg-tertiary);color:var(--text-primary);border:2px solid var(--border)}.level-btn.unlocked:hover{border-color:var(--accent-primary);box-shadow:var(--shadow-glow);transform:scale(1.1)}.level-btn.completed{background:var(--accent-gradient);color:#fff;border:2px solid #0000}.level-btn.locked{color:var(--text-muted);cursor:not-allowed;background:#1e1e3280;border:2px solid #64748b33}.level-btn .stars-indicator{letter-spacing:1px;font-size:.65rem;position:absolute;bottom:-8px}.star{transition:all .3s;display:inline-block}.star.filled{color:var(--warning);filter:drop-shadow(0 0 4px #f59e0b80)}.star.empty{color:var(--text-muted)}.star.animate{animation:.4s starPop}.progress-bar{background:var(--bg-tertiary);border-radius:4px;height:8px;overflow:hidden}.progress-fill{background:var(--accent-gradient);border-radius:4px;height:100%;transition:width .5s}.puzzle-area{background:var(--bg-secondary);border:1px solid 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(min-width:769px){.level-grid{grid-template-columns:repeat(auto-fill,72px);gap:20px}}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:16px;display:grid}.confetti-canvas{pointer-events:none;z-index:200;position:fixed;inset:0}.memory-grid{justify-content:center;gap:8px;display:grid}.memory-card{aspect-ratio:1;border-radius:var(--radius-md);cursor:pointer;transform-style:preserve-3d;justify-content:center;align-items:center;font-size:1.5rem;transition:transform .4s;display:flex;position:relative}.memory-card.flipped{transform:rotateY(180deg)}.memory-card-face{backface-visibility:hidden;border-radius:var(--radius-md);justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.memory-card-front{background:var(--accent-gradient);font-size:1.8rem;transform:rotateY(180deg)}.memory-card-back{background:var(--bg-tertiary);border:2px solid var(--border);color:var(--text-muted);font-size:1.5rem}.hanoi-container{justify-content:center;align-items:flex-end;gap:20px;width:100%;display:flex}.hanoi-peg{border-bottom:4px solid var(--text-muted);flex-direction:column-reverse;align-items:center;width:120px;min-height:160px;padding-top:8px;display:flex;position:relative}.hanoi-peg:before{content:"";background:var(--text-muted);border-radius:2px;width:4px;height:100%;position:absolute;bottom:0;left:50%;transform:translate(-50%)}.hanoi-disk{cursor:grab;z-index:1;border-radius:12px;height:24px;transition:all .2s;position:relative}.hanoi-disk:hover{filter:brightness(1.2);transform:translateY(-4px)}.crossing-scene{flex-wrap:wrap;justify-content:center;align-items:center;gap:16px;display:flex}.crossing-bank{background:var(--bg-tertiary);border-radius:var(--radius-md);border:2px solid 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.15s;display:flex}.grid-cell:hover{background:var(--bg-card)}.grid-cell.filled{background:var(--accent-primary);color:#fff}.grid-cell.marked{background:#ef444433}.grid-cell.selected{outline:2px solid var(--accent-secondary);outline-offset:-2px}.grid-cell.correct{background:var(--success)}.grid-cell.wrong{background:var(--danger);animation:.3s shake}.maze-grid{gap:0;display:grid}.maze-cell{aspect-ratio:1;width:100%;transition:background .15s}.maze-wall{background:var(--bg-tertiary)}.maze-path{background:var(--bg-primary)}.maze-player{background:var(--accent-primary);border-radius:50%;animation:1s infinite pulse}.maze-start{background:var(--success)}.maze-end{background:var(--danger);animation:1.5s infinite pulse}.maze-visited{background:#7c3aed26}.sudoku-grid{border:2px solid var(--text-muted);grid-template-columns:repeat(9,1fr);gap:1px;display:grid}.sudoku-cell{aspect-ratio:1;background:var(--bg-tertiary);cursor:pointer;border:1px solid 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.15s;display:flex}.queen-cell.light{background:var(--bg-tertiary)}.queen-cell.dark{background:var(--bg-primary)}.queen-cell:hover{background:#7c3aed33}.queen-cell.threatened{background:#ef444426}.slider-grid{gap:3px;display:grid}.slider-tile{aspect-ratio:1;background:var(--accent-gradient);color:#fff;border-radius:var(--radius-sm);cursor:pointer;justify-content:center;align-items:center;font-size:1.2rem;font-weight:700;transition:all .15s;display:flex}.slider-tile:hover{filter:brightness(1.15)}.slider-tile.empty{cursor:default;background:0 0}.mine-cell{aspect-ratio:1;background:var(--bg-tertiary);cursor:pointer;border:1px solid var(--border);justify-content:center;align-items:center;min-width:28px;font-size:.8rem;font-weight:700;transition:all .1s;display:flex}.mine-cell:hover{background:var(--bg-card)}.mine-cell.revealed{background:var(--bg-primary);cursor:default}.mine-cell.mine{background:var(--danger)}.mine-cell.flagged{background:#f59e0b33}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeOut{0%{opacity:1}to{opacity:0}}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes slideDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.6}}@keyframes starPop{0%{transform:scale(0)rotate(-30deg)}60%{transform:scale(1.3)rotate(10deg)}to{transform:scale(1)rotate(0)}}@keyframes float{0%{transform:translateY(100vh)rotate(0)}to{transform:translateY(-100px)rotate(360deg)}}@keyframes bob{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}@keyframes glow{0%,to{box-shadow:0 0 10px #7c3aed4d}50%{box-shadow:0 0 25px #7c3aed99}}@keyframes countUp{0%{opacity:0;transform:scale(.5)}to{opacity:1;transform:scale(1)}}@media (max-width:480px){.page-content{padding:12px}.level-grid{gap:10px}.level-btn{width:48px;height:48px;font-size:.875rem}.modal-content{margin:10px;padding:20px}.btn{padding:10px 20px;font-size:.9rem}.btn-lg{padding:12px 28px;font-size:1rem}.stats-grid{grid-template-columns:repeat(2,1fr)}.hanoi-peg{width:80px;min-height:120px}.hanoi-disk{height:20px}.bottom-bar{gap:6px}.bottom-bar .btn{padding:8px 12px;font-size:.8rem}.sudoku-cell{min-width:24px;font-size:.75rem}}@media (min-width:481px) and (max-width:768px){.level-grid{gap:12px}.hanoi-peg{width:100px}}@media (min-width:769px){.page-content{padding:24px 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