.conversion-game-shell{width:min(100%,1080px);margin:0 auto;padding:0 var(--container-padding-x) var(--spacing-2xl)}.game-header{padding:var(--spacing-md) 0}.game-header-inner{width:100%;display:flex;align-items:center;justify-content:center;gap:var(--spacing-md);flex-wrap:wrap;padding:var(--spacing-md) clamp(var(--spacing-md),2vw,var(--spacing-lg));border:1px solid var(--outline);border-radius:var(--radius-2xl);background:transparent}.game-title{font-size:var(--font-size-lg);font-weight:700;color:var(--text-primary);margin:0}.game-subtitle{font-size:var(--font-size-xs);color:var(--text-secondary);margin:0}.level-select{padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-md);border:1px solid var(--outline);background:transparent;color:var(--text-primary);font-size:var(--font-size-sm);font-family:inherit;cursor:pointer;min-height:44px}.score-badge{padding:var(--spacing-xs) var(--spacing-md);border-radius:999px;font-size:var(--font-size-sm);font-weight:600;color:var(--primary);white-space:nowrap;border:1px solid var(--outline);background:transparent}.workspace-card{max-width:100%;margin:var(--spacing-lg) auto;border:1px solid var(--outline);border-radius:clamp(20px,3vw,32px);overflow:hidden;background:transparent}.problem-statement{font-size:var(--font-size-lg);font-weight:600;color:var(--text-primary);line-height:var(--line-height-normal);margin:0;flex:1 1 340px;text-align:center;max-width:720px}.equation-scroll-wrapper{padding:var(--spacing-lg) var(--spacing-xl);overflow-x:auto;border-bottom:1px solid var(--outline);display:flex;justify-content:center;-webkit-overflow-scrolling:touch}.chain-equation{display:flex;align-items:center;gap:var(--spacing-sm);min-height:120px;width:max-content;margin:0 auto}.start-block{display:flex;flex-direction:row;align-items:center;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-lg);border:1px solid var(--outline);background:transparent}.start-val{font-size:var(--font-size-xl);font-weight:800;color:var(--primary);font-family:Courier New,monospace}.start-unit{font-size:var(--font-size-sm);font-weight:700;color:var(--text-secondary);padding:var(--spacing-sm);transition:all var(--transition-normal)}.start-unit--cancelled{text-decoration:line-through;color:var(--text-disabled)}.fraction-sequence{display:flex;align-items:center;gap:var(--spacing-sm)}.fraction-node{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-xs) var(--spacing-sm);min-width:140px}.fraction-times{font-size:var(--font-size-lg);font-weight:700;color:var(--text-secondary)}.fraction-top,.fraction-bottom{display:flex;flex-direction:row;align-items:center;gap:4px}.fraction-line{width:100%;height:1px;background-color:var(--text-primary)}.unit-slot{min-width:64px;min-height:44px;padding:4px 8px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:var(--font-size-sm);cursor:pointer;transition:all var(--transition-fast);background:transparent}.unit-slot-empty{border:1px dashed var(--outline);color:var(--text-disabled)}.unit-slot-empty:hover{border-color:var(--primary);color:var(--text-secondary)}.unit-slot-filled{border:1px solid var(--primary);color:var(--primary)}.unit-slot-filled:hover{border-color:var(--error);color:var(--error)}.unit-slot--cancelled{text-decoration:line-through;opacity:.4}.val-slot{width:64px;height:44px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:var(--font-size-sm);font-family:Courier New,monospace;transition:all var(--transition-fast);background:transparent}.val-slot-empty{border:1px dashed var(--outline);color:var(--text-disabled)}.val-slot-filled{border:1px solid var(--outline);color:var(--primary);cursor:pointer}.val-slot-filled:hover{border-color:var(--error);color:var(--error)}.val-slot-input{width:80px;border:1px solid var(--primary)}.val-slot-input input{width:100%;border:none;outline:none;background:transparent;font-size:var(--font-size-sm);font-weight:700;font-family:Courier New,monospace;color:var(--text-primary);text-align:center}.final-answer-group{display:flex;align-items:center;gap:var(--spacing-sm);flex-wrap:nowrap;transition:opacity .3s,transform .3s}.final-answer-group.hidden{display:none!important}.equals-sign{font-size:var(--font-size-xl);font-weight:700;color:var(--text-secondary)}.final-input{width:112px;text-align:center;background:transparent;color:var(--text-primary);font-weight:800;font-size:var(--font-size-lg);border-radius:var(--radius-xl);padding:10px var(--spacing-sm);border:1px solid var(--outline);outline:none;font-family:Courier New,monospace;transition:all .15s}.final-input-active{border:1px solid var(--primary)}.final-input-success{color:var(--accent);border-color:var(--accent)}.final-unit-slot{padding:var(--spacing-xs) var(--spacing-sm);border:1px solid var(--outline);color:var(--text-secondary);border-radius:var(--radius-xl);font-weight:700;font-size:var(--font-size-xs);min-width:64px;display:inline-flex;align-items:center;justify-content:center;white-space:nowrap}.final-unit-slot-success{border-color:var(--accent);color:var(--accent)}.unit-inline,.unit-fraction{display:inline-flex;align-items:center;justify-content:center;min-width:100%}.unit-fraction{flex-direction:column;gap:2px;line-height:1}.unit-fraction-row{display:inline-flex;align-items:center;justify-content:center;gap:2px;white-space:nowrap}.unit-fraction-part{display:inline-block;white-space:nowrap}.unit-fraction-dot{font-size:.8em}.unit-fraction-line{width:100%;min-width:24px;height:1px;background:currentColor;opacity:.8}.tray-container{padding:var(--spacing-md) var(--spacing-xl);border-top:1px solid var(--outline);display:flex;justify-content:center}.guidance-panel{padding:var(--spacing-md) var(--spacing-xl);display:grid;gap:var(--spacing-sm);justify-items:center}.tray-label{font-size:var(--font-size-sm);color:var(--text-secondary);margin:0;font-weight:600;text-align:center;max-width:56ch}.drag-tray{display:flex;flex-wrap:wrap;gap:var(--spacing-sm);min-height:48px;align-items:center;justify-content:center;width:100%}.drag-tray p,.drag-tray>span{font-size:var(--font-size-sm);color:var(--text-secondary);font-style:italic}.tray-item{display:flex;align-items:center;justify-content:center;background:transparent;cursor:grab;user-select:none;transition:all var(--transition-fast)}.tray-item:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px)}.tray-item:active{cursor:grabbing}.tray-unit-item{width:auto;min-width:64px;padding:4px 8px;font-size:var(--font-size-sm)}.tray-val-item{width:64px;height:44px;font-size:var(--font-size-sm);font-family:Courier New,monospace}.drag-hover{border-color:var(--primary)!important;color:var(--primary)!important}.control-panel{padding:var(--spacing-md) var(--spacing-xl);display:flex;align-items:center;justify-content:space-between;gap:var(--spacing-md);flex-wrap:wrap;justify-content:center}.hint-text{font-size:var(--font-size-sm);color:var(--text-secondary);min-width:0;margin:0;text-align:center;line-height:var(--line-height-relaxed);max-width:60ch}.control-buttons{display:flex;gap:var(--spacing-sm);flex-shrink:0;justify-content:center}.modal-overlay{position:fixed;inset:0;background-color:#00000059;display:flex;align-items:center;justify-content:center;z-index:100;padding:var(--spacing-md)}.modal-overlay.hidden{display:none!important}.modal-card{background-color:var(--background);border-radius:var(--radius-2xl);padding:var(--spacing-xl);max-width:420px;width:100%;text-align:center;border:1px solid var(--outline);display:flex;flex-direction:column;align-items:center;gap:var(--spacing-md);transform:scale(.95);transition:transform var(--transition-normal)}.modal-overlay:not(.hidden) .modal-card{transform:scale(1)}.modal-icon{font-size:3rem}.modal-title{font-size:var(--font-size-2xl);font-weight:700;color:var(--text-primary);margin:0}.modal-explanation{font-size:var(--font-size-sm);color:var(--text-secondary);line-height:var(--line-height-relaxed);margin:0}.toast{position:fixed;bottom:1.25rem;right:1.25rem;max-width:22rem;padding:.75rem 1rem;border-radius:var(--radius-xl);border:1px solid var(--outline);font-size:var(--font-size-xs);font-weight:600;display:flex;align-items:center;gap:var(--spacing-sm);z-index:200;background-color:var(--background);transition:transform .3s ease,opacity .3s ease}.toast--hide{transform:translateY(2.5rem);opacity:0}.toast-success{color:var(--accent);border-color:var(--accent)}.toast-error{color:var(--error);border-color:var(--error)}.toast-info{color:var(--primary);border-color:var(--primary)}@keyframes shake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}.animate-shake{animation:shake .4s ease-in-out}@keyframes factorPulse{0%,to{opacity:1}50%{opacity:.6}}.animate-pulse{animation:factorPulse 1.5s ease-in-out infinite}@media(max-width:768px){.conversion-game-shell{padding-bottom:var(--spacing-xl)}.game-header-inner{justify-content:center;gap:var(--spacing-sm)}.problem-statement{order:3;flex-basis:100%;font-size:clamp(1.1rem,2.6vw,var(--font-size-lg))}.equation-scroll-wrapper,.tray-container,.control-panel,.guidance-panel{padding-left:var(--spacing-md);padding-right:var(--spacing-md)}.fraction-node{min-width:124px}.control-panel{justify-content:center}.control-buttons{width:100%}.control-buttons .btn{flex:1 1 0}.toast{left:var(--spacing-md);right:var(--spacing-md);max-width:none}}@media(max-width:520px){.conversion-game-shell{padding-left:var(--spacing-sm);padding-right:var(--spacing-sm)}.game-header{padding-top:var(--spacing-sm)}.game-header-inner{padding:var(--spacing-sm);border-radius:var(--radius-xl)}.level-select,.score-badge{width:100%;justify-content:center;text-align:center}.problem-statement{font-size:var(--font-size-base)}.equation-scroll-wrapper{justify-content:flex-start;padding-top:var(--spacing-md);padding-bottom:var(--spacing-md)}.fraction-node{min-width:112px;gap:6px;padding-left:0;padding-right:0}.unit-slot,.val-slot,.val-slot-input{width:56px;height:42px}.final-input{width:96px}.drag-tray{gap:10px}.control-buttons{flex-direction:column}.control-buttons .btn{width:100%}}