.auth-page{min-height:calc(100vh - var(--navbar-height));display:flex;align-items:center;justify-content:center;padding:var(--spacing-xl);background:linear-gradient(135deg,var(--bg-primary) 0%,var(--bg-secondary) 100%)}.auth-container{width:100%;max-width:420px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--spacing-2xl);animation:slideUp .5s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.auth-header{text-align:center;margin-bottom:var(--spacing-xl)}.auth-icon{font-size:3rem;margin-bottom:var(--spacing-md)}.auth-header h1{margin-bottom:var(--spacing-xs);font-size:1.75rem}.auth-header p{color:var(--text-secondary);font-size:.95rem}.auth-form{display:flex;flex-direction:column;gap:var(--spacing-lg)}.auth-error{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md);background:#ef444426;border:1px solid rgba(239,68,68,.3);border-radius:var(--radius-md);color:#ef4444;font-size:.875rem;animation:shake .5s ease}@keyframes shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-5px)}40%,80%{transform:translate(5px)}}.error-icon{flex-shrink:0}.auth-success{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md);background:#22c55e26;border:1px solid rgba(34,197,94,.3);border-radius:var(--radius-md);color:#22c55e;font-size:.875rem}.btn-large{padding:var(--spacing-md) var(--spacing-xl);font-size:1rem}.auth-footer{margin-top:var(--spacing-xl);text-align:center;padding-top:var(--spacing-lg);border-top:1px solid var(--border-color)}.auth-divider{display:flex;align-items:center;gap:var(--spacing-md);margin:var(--spacing-lg) 0;color:var(--text-secondary);font-size:.85rem;text-transform:uppercase;letter-spacing:.05em}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:var(--border-color)}.google-signin-wrapper{display:flex;justify-content:center}.auth-footer p{color:var(--text-secondary);font-size:.875rem}.auth-footer a{color:var(--primary-light);font-weight:600}.auth-footer a:hover{text-decoration:underline}@media(max-width:480px){.auth-page{padding:var(--spacing-md)}.auth-container{padding:var(--spacing-lg)}}.upload-page{min-height:calc(100vh - var(--navbar-height));padding:var(--spacing-xl);background:linear-gradient(135deg,var(--bg-primary) 0%,var(--bg-secondary) 100%)}.upload-container{max-width:640px;margin:0 auto;animation:fadeIn .5s ease}.upload-header{text-align:center;margin-bottom:var(--spacing-xl)}.upload-header h1{margin-bottom:var(--spacing-sm)}.upload-header p{color:var(--text-secondary);font-size:1.125rem}.upload-form{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--spacing-xl);display:flex;flex-direction:column;gap:var(--spacing-xl)}.upload-message{display:flex;align-items:flex-start;gap:var(--spacing-sm);padding:var(--spacing-md);border-radius:var(--radius-md);font-size:.875rem;animation:slideDown .3s ease;line-height:1.5}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.upload-message.error{background:#ef444426;border:1px solid rgba(239,68,68,.3);color:#ef4444}.upload-message.success{background:#22c55e26;border:1px solid rgba(34,197,94,.3);color:#22c55e}.message-icon{flex-shrink:0}.form-section{display:flex;flex-direction:column;gap:var(--spacing-md)}.form-section h3{font-size:.875rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);margin-bottom:var(--spacing-xs)}.upload-form textarea{width:100%;padding:var(--spacing-md);background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-family:inherit;font-size:1rem;resize:vertical;transition:all var(--transition-fast)}.upload-form textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #8b5cf626}.difficulty-select{display:flex;gap:var(--spacing-sm)}.difficulty-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:var(--spacing-xs);padding:var(--spacing-md);background:var(--bg-tertiary);border:2px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-secondary);font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.difficulty-btn:hover{border-color:var(--border-light);background:var(--bg-secondary)}.difficulty-btn.active{color:var(--text-primary);font-weight:600}.difficulty-btn.active.easy{border-color:#22c55e;background:#22c55e26}.difficulty-btn.active.medium{border-color:#f59e0b;background:#f59e0b26}.difficulty-btn.active.hard{border-color:#ef4444;background:#ef444426}.difficulty-btn.active.hard{border-color:#f87171;background:#ef44441a}.checkbox-label{display:flex;align-items:center;gap:var(--spacing-sm);cursor:pointer;color:var(--text-primary);font-weight:500}.checkbox-label input[type=checkbox]{width:18px;height:18px;cursor:pointer;accent-color:var(--primary-color)}.checkbox-label span{-webkit-user-select:none;user-select:none}.dropzone{border:2px dashed var(--border-color);border-radius:var(--radius-lg);padding:var(--spacing-2xl);text-align:center;cursor:pointer;transition:all var(--transition-fast);background:var(--bg-tertiary)}.dropzone:hover{border-color:var(--primary-color);background:#8b5cf60d}.dropzone.has-image{padding:var(--spacing-md);cursor:default}.dropzone-content{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm)}.dropzone-icon{font-size:3rem;margin-bottom:var(--spacing-sm)}.dropzone-text{font-weight:500;color:var(--text-primary)}.dropzone-hint{font-size:.875rem;color:var(--text-muted)}.image-preview{position:relative;display:inline-block}.image-preview img{max-width:100%;max-height:300px;border-radius:var(--radius-md);object-fit:contain}.clear-image{position:absolute;top:var(--spacing-sm);right:var(--spacing-sm);width:32px;height:32px;border-radius:50%;background:#000000b3;color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:all var(--transition-fast)}.clear-image:hover{background:#ef4444;transform:scale(1.1)}.submit-btn{width:100%}.submit-btn:disabled{opacity:.5;cursor:not-allowed}.btn-spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;margin-right:var(--spacing-sm)}@media(max-width:480px){.upload-page{padding:var(--spacing-md)}.upload-form{padding:var(--spacing-lg)}.difficulty-select{flex-direction:column}.dropzone{padding:var(--spacing-xl)}}.gallery-container{animation:fadeIn .5s ease}.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--spacing-lg)}.puzzle-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);overflow:hidden;text-decoration:none;color:inherit;transition:all var(--transition-base);animation:fadeIn .5s ease backwards}.puzzle-card:hover{transform:translateY(-8px);border-color:var(--primary-color);box-shadow:var(--shadow-xl),var(--shadow-glow)}.puzzle-card-image{position:relative;width:100%;height:180px;overflow:hidden}.puzzle-card-image img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-slow)}.puzzle-card:hover .puzzle-card-image img{transform:scale(1.1)}.puzzle-card-overlay{position:absolute;inset:0;background:#0006;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity var(--transition-base)}.puzzle-card:hover .puzzle-card-overlay{opacity:1}.play-icon{width:60px;height:60px;background:var(--gradient-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:#fff;box-shadow:var(--shadow-lg);transform:scale(.8);transition:transform var(--transition-base)}.puzzle-card:hover .play-icon{transform:scale(1)}.puzzle-card-content{padding:var(--spacing-lg)}.puzzle-card-title{font-size:1.125rem;font-weight:600;margin-bottom:var(--spacing-sm);color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.puzzle-card-meta{display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-sm)}.differences-count{font-size:.875rem;color:var(--text-muted)}.difficulty-rating{display:inline-flex;align-items:center;font-size:.8rem;font-weight:700;font-variant-numeric:tabular-nums}.rating-easy{color:#22c55e}.rating-medium{color:#f59e0b}.rating-hard{color:#ef4444}.gallery-controls{display:flex;justify-content:flex-end;margin-bottom:var(--spacing-lg)}.sort-btn{display:inline-flex;align-items:center;gap:6px;padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);color:var(--text-secondary);font-size:.875rem;font-weight:500;cursor:pointer;transition:all var(--transition-base)}.sort-btn:hover{border-color:var(--primary-color);color:var(--primary-color);background:var(--bg-card-hover, var(--bg-card))}.sort-btn.sort-active{border-color:var(--primary-color);color:var(--primary-color);background:#6366f114}.empty-state{text-align:center;padding:var(--spacing-2xl);background:var(--bg-card);border:2px dashed var(--border-color);border-radius:var(--radius-xl)}.empty-icon{font-size:4rem;margin-bottom:var(--spacing-md);opacity:.5}.empty-state h3{margin-bottom:var(--spacing-sm)}.empty-state p{margin-bottom:var(--spacing-lg)}.error-banner{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md) var(--spacing-lg);background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:var(--radius-lg);color:#ef4444;margin-bottom:var(--spacing-lg)}.skeleton-card{pointer-events:none}.skeleton{background:linear-gradient(90deg,var(--bg-tertiary) 25%,var(--bg-card-hover) 50%,var(--bg-tertiary) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite}.skeleton-image{width:100%;height:180px}.skeleton-content{padding:var(--spacing-lg)}.skeleton-title{height:24px;border-radius:var(--radius-sm);margin-bottom:var(--spacing-sm)}.skeleton-text{height:16px;width:60%;border-radius:var(--radius-sm)}.load-more-container{display:flex;justify-content:center;margin-top:var(--spacing-xl);margin-bottom:var(--spacing-xl)}.load-more-btn{padding:var(--spacing-md) var(--spacing-xl);background:var(--primary-color);color:#fff;border:none;border-radius:var(--radius-lg);font-size:1rem;font-weight:600;cursor:pointer;transition:all var(--transition-base);box-shadow:var(--shadow-md)}.load-more-btn:hover:not(:disabled){background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-lg)}.load-more-btn:disabled{opacity:.6;cursor:not-allowed}@media(max-width:768px){.gallery-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:var(--spacing-md)}.puzzle-card-image{height:150px}}@media(max-width:480px){.gallery-grid{grid-template-columns:1fr}}.puzzle-card.unpublished{opacity:.65;border-color:#f59e0b66}.unpublished-badge{position:absolute;top:8px;left:8px;background:#f59e0be6;color:#fff;font-size:.65rem;font-weight:800;letter-spacing:1px;padding:2px 8px;border-radius:4px}.publish-toggle{all:unset;cursor:pointer;font-size:.72rem;font-weight:700;padding:2px 8px;border-radius:4px;letter-spacing:.5px;transition:background .2s,color .2s;white-space:nowrap}.publish-toggle.published{background:#22c55e26;color:#22c55e}.publish-toggle.published:hover{background:#22c55e4d}.publish-toggle.draft{background:#f59e0b26;color:#f59e0b}.publish-toggle.draft:hover{background:#f59e0b4d}.puzzle-detail{animation:fadeIn .5s ease;max-width:1200px;margin:0 auto}.puzzle-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;gap:var(--spacing-lg)}.loading-spinner{width:48px;height:48px;border:4px solid var(--border-color);border-top-color:var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.puzzle-error{text-align:center;padding:var(--spacing-2xl);background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl)}.error-icon{font-size:4rem;margin-bottom:var(--spacing-md)}.puzzle-header{margin-bottom:var(--spacing-xl)}.back-link{display:inline-flex;align-items:center;gap:var(--spacing-xs);color:var(--text-muted);font-size:.875rem;margin-bottom:var(--spacing-md);transition:color var(--transition-fast)}.back-link:hover{color:var(--primary-light)}.puzzle-header h1{margin-bottom:var(--spacing-sm)}.puzzle-description{color:var(--text-secondary);font-size:1.125rem}.progress-section{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--spacing-lg);margin-bottom:var(--spacing-lg)}.progress-info{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-sm)}.progress-label{font-weight:600;color:var(--text-secondary);text-transform:uppercase;font-size:.75rem;letter-spacing:.05em}.progress-count{font-weight:700;color:var(--text-primary);font-size:1.125rem}.progress-bar{height:12px;background:var(--bg-tertiary);border-radius:var(--radius-full);overflow:hidden}.progress-fill{height:100%;background:var(--gradient-accent);border-radius:var(--radius-full);transition:width .5s ease;position:relative}.progress-fill:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent);animation:shimmer 2s infinite}.completion-message{margin-top:var(--spacing-md);padding:var(--spacing-md);background:#22c55e26;border:1px solid rgba(34,197,94,.3);border-radius:var(--radius-lg);color:#22c55e;font-weight:600;text-align:center;animation:bounce .5s ease}.puzzle-controls{display:flex;gap:var(--spacing-md);margin-bottom:var(--spacing-lg);flex-wrap:wrap}.puzzle-controls button{flex:1;min-width:150px}.btn-active{background:var(--gradient-accent)}.btn-secondary{background:var(--bg-tertiary);color:var(--text-primary)}.btn-secondary:hover{background:var(--border-light)}.puzzle-controls .publish-toggle{font-size:.85rem;font-weight:700;padding:.5rem 1rem;border-radius:var(--radius-md);border:none;cursor:pointer;letter-spacing:.5px;transition:background .2s}.puzzle-controls .publish-toggle.published{background:#22c55e26;color:#22c55e}.puzzle-controls .publish-toggle.published:hover{background:#22c55e4d}.puzzle-controls .publish-toggle.draft{background:#f59e0b26;color:#f59e0b}.puzzle-controls .publish-toggle.draft:hover{background:#f59e0b4d}.puzzle-game-area{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.puzzle-image-container{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);overflow:hidden}.puzzle-image-container h3{padding:var(--spacing-md) var(--spacing-lg);margin:0;background:var(--bg-tertiary);font-size:.875rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);text-align:center}.canvas-wrapper{padding:var(--spacing-md);display:flex;justify-content:center;align-items:center;min-height:300px;background:var(--bg-primary);position:relative}.canvas-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-md);color:var(--text-secondary)}.canvas-wrapper canvas{border-radius:var(--radius-md);cursor:crosshair;transition:transform var(--transition-fast)}.click-feedback{position:fixed;transform:translate(-50%,-50%);width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.25rem;font-weight:700;pointer-events:none;animation:feedbackPop .5s ease forwards;z-index:1000}.click-feedback.success{background:#22c55ee6;color:#fff;box-shadow:0 0 20px #22c55e80}.click-feedback.miss{background:#ef4444e6;color:#fff;box-shadow:0 0 20px #ef444480}.puzzle-info{display:flex;gap:var(--spacing-lg);background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--spacing-lg)}.info-item{display:flex;flex-direction:column;gap:var(--spacing-xs)}.info-label{font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);font-weight:600}.info-value{font-size:1.25rem;font-weight:700;color:var(--text-primary)}.badge{display:inline-flex;align-items:center;padding:var(--spacing-xs) var(--spacing-sm);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;border-radius:var(--radius-full);background:var(--bg-tertiary);color:var(--text-secondary)}.badge-easy{background:#22c55e26;color:#22c55e}.badge-medium{background:#f59e0b26;color:#f59e0b}.badge-hard{background:#ef444426;color:#ef4444}@media(max-width:900px){.puzzle-game-area{grid-template-columns:1fr}.puzzle-controls{flex-direction:column}.puzzle-controls button{width:100%}}@media(max-width:480px){.puzzle-info{flex-direction:column;gap:var(--spacing-md)}}.arcade-mode{margin:0 auto;padding:0;font-family:Segoe UI,Helvetica Neue,Arial,sans-serif;display:flex;flex-direction:column;flex:1;min-height:0;overflow:hidden}.main-content:has(.arcade-mode){padding:.25rem}.arcade-menu,.arcade-gameover,.arcade-leaderboard{max-width:960px;margin:0 auto;width:100%}.ph-cabinet{background:linear-gradient(180deg,#0b1a3e,#0f2557 40%,#0b1a3e);border:4px solid #5c6b8a;border-radius:16px;box-shadow:0 0 0 2px #1e2d53,0 0 30px #1e5adc40,inset 0 1px #ffffff0d;overflow:hidden;color:#e4ecff;animation:fadeIn .4s}.ph-cabinet{display:flex;flex-direction:column;height:100%}.arcade-game.ph-cabinet{flex:1;min-height:0;overflow:hidden}.ph-title-bar{background:linear-gradient(180deg,#c0392b,#962d22);text-align:center;padding:.6rem 1rem;border-bottom:3px solid #7a1f16}.ph-logo,.ph-logo-sm{font-family:Arial Black,sans-serif;font-weight:900;text-transform:uppercase;letter-spacing:2px;text-shadow:2px 2px 0 rgba(0,0,0,.5)}.ph-logo{font-size:1.6rem;color:#ffe066}.ph-logo-sm{font-size:1.1rem;color:#ffe066;letter-spacing:3px}.ph-top-bar{display:flex;align-items:center;justify-content:space-between;background:linear-gradient(180deg,#c0392b,#962d22);padding:.35rem .8rem;border-bottom:3px solid #7a1f16;flex-wrap:wrap;gap:.25rem;flex-shrink:0}.ph-top-stats{display:flex;gap:1rem}.ph-stat{display:flex;align-items:center;gap:.3rem;background:#00000059;border-radius:6px;padding:.2rem .6rem;border:1px solid rgba(255,255,255,.12)}.ph-stat-icon{font-size:1rem}.ph-stat-val{font-family:Courier New,monospace;font-weight:700;font-size:1.3rem;color:#ffe066;text-shadow:0 0 6px rgba(255,224,102,.6);min-width:2ch;text-align:right}.ph-stat-val.ph-warn{color:#f44;animation:pulse .8s infinite;text-shadow:0 0 8px rgba(255,68,68,.7)}.ph-score-stat .ph-stat-val{color:#4cff72;text-shadow:0 0 6px rgba(76,255,114,.5)}.ph-highscore{font-size:.7rem;letter-spacing:1px;color:#ffd1d1;text-transform:uppercase;text-align:right}.ph-highscore span{font-weight:700;font-family:Courier New,monospace;color:#ffe066;font-size:.85rem}.ph-bottom-bar{display:flex;align-items:center;justify-content:space-between;background:linear-gradient(180deg,#162a5a,#0e1d40);border-top:3px solid #5c6b8a;padding:.4rem 1rem;gap:.5rem;flex-shrink:0}.ph-round{font-family:Arial Black,sans-serif;font-size:.95rem;letter-spacing:3px;color:#8eaadb;text-transform:uppercase}.ph-diff-count{font-family:Courier New,monospace;font-weight:700;font-size:1.1rem;color:#ffe066;text-shadow:0 0 6px rgba(255,224,102,.5)}.ph-clues{display:flex;gap:.35rem}.ph-clue-icon{background:none;border:none;font-size:1.5rem;cursor:pointer;filter:drop-shadow(0 0 4px rgba(255,255,255,.4));transition:transform .15s,filter .2s;padding:0;line-height:1}.ph-clue-icon.available:hover{transform:scale(1.25);filter:drop-shadow(0 0 8px #ffe066)}.ph-clue-icon.used{opacity:.25;cursor:default;filter:grayscale(1)}.timebar-container{margin:0;padding:0 .6rem;background:#0e1d40;flex-shrink:0}.timebar-track{width:100%;height:10px;background:#ffffff14;border-radius:5px;overflow:hidden}.timebar-fill{height:100%;background:linear-gradient(90deg,#4cff72,#06b6d4);transition:width .9s linear,background .3s;border-radius:5px}.timebar-fill.warning{background:linear-gradient(90deg,#f97316,#f44);box-shadow:0 0 8px #ff444480;animation:pulse .8s infinite}.ph-images-frame{padding:.5rem .6rem;background:linear-gradient(180deg,#0f2050,#132b60)}.ph-images-frame{flex:1 1 auto;min-height:0;display:flex;flex-direction:column;overflow:hidden}.arcade-images-container{display:flex;justify-content:center;align-items:stretch;gap:0}.arcade-images-container{flex:1 1 auto;min-height:0}.ph-divider{width:3px;background:#5c6b8a;flex-shrink:0}.arcade-image-wrapper{flex:1;min-width:0;display:flex;align-items:center;justify-content:center}.arcade-image-wrapper{flex:1 1 50%;min-height:0}.canvas-wrapper{position:relative;display:flex;justify-content:center;align-items:center;width:100%;min-height:0}.canvas-wrapper canvas{max-width:100%;height:auto;border:2px solid #3a4d7a;display:block}.canvas-wrapper{width:100%;height:100%;display:flex;align-items:center;justify-content:center;overflow:hidden}.canvas-wrapper 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