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var(--transition-normal)}.rest-option-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}.rest-option-icon{width:56px;height:56px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:24px;margin:0 auto var(--space-md);color:#fff}.rest-option-card h3{font-size:var(--font-size-md);font-weight:600;margin-bottom:var(--space-xs)}.rest-option-card p{font-size:var(--font-size-xs);color:var(--color-text-muted)}.rest-section-title{font-size:var(--font-size-xl);font-weight:600;margin-bottom:var(--space-lg)}.timer-choices{display:flex;gap:var(--space-lg);margin-bottom:var(--space-lg)}.timer-choice-btn{width:100px;height:100px;border-radius:var(--radius-xl);border:2px solid var(--color-border);background:var(--color-bg-card);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;transition:all var(--transition-normal)}.timer-choice-btn:hover{border-color:var(--color-primary);background:var(--color-primary-bg)}.timer-choice-num{font-size:var(--font-size-2xl);font-weight:700;color:var(--color-primary)}.timer-choice-unit{font-size:var(--font-size-xs);color:var(--color-text-muted)}.timer-display{position:relative;width:200px;height:200px;display:flex;align-items:center;justify-content:center;margin-bottom:var(--space-lg)}.timer-ring{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}.timer-text{display:flex;flex-direction:column;align-items:center;gap:4px;z-index:1}.timer-digits{font-size:var(--font-size-3xl);font-weight:700;color:var(--color-primary);font-variant-numeric:tabular-nums}.timer-label{font-size:var(--font-size-sm);color:var(--color-text-muted)}.timer-done-emoji{font-size:36px}.timer-done-text{font-size:var(--font-size-lg);font-weight:600;color:var(--color-text-primary)}.timer-done-sub{font-size:var(--font-size-sm);color:var(--color-text-secondary)}.rest-back-btn{margin-top:var(--space-lg)}.fact-card{background:var(--color-bg-card);border-radius:var(--radius-2xl);padding:var(--space-2xl);box-shadow:var(--shadow-lg);text-align:center;max-width:500px;margin-bottom:var(--space-xl)}.fact-emoji{font-size:56px;margin-bottom:var(--space-md)}.fact-title{font-size:var(--font-size-xl);font-weight:700;margin-bottom:var(--space-md);color:var(--color-text-primary)}.fact-content{font-size:var(--font-size-base);color:var(--color-text-secondary);line-height:1.8}.fact-actions{display:flex;gap:var(--space-md)}.game-header{display:flex;justify-content:space-between;align-items:center;width:100%;max-width:400px;margin-bottom:var(--space-lg)}.game-header h2{font-size:var(--font-size-lg);font-weight:600}.game-stats{display:flex;gap:var(--space-md);font-size:var(--font-size-sm);color:var(--color-text-secondary)}.game-score{color:var(--color-primary);font-weight:600}.game-area{background:var(--color-bg-card);border-radius:var(--radius-2xl);padding:var(--space-2xl);box-shadow:var(--shadow-card);text-align:center;min-width:350px;min-height:200px;display:flex;align-items:center;justify-content:center;margin-bottom:var(--space-lg)}.game-instruction{font-size:var(--font-size-md);color:var(--color-text-secondary);margin-bottom:var(--space-lg)}.game-numbers{font-size:48px;font-weight:700;color:var(--color-primary);letter-spacing:12px;font-variant-numeric:tabular-nums}.game-input-field{width:250px;padding:12px;font-size:var(--font-size-2xl);font-weight:600;text-align:center;letter-spacing:8px;border:2px solid var(--color-border);border-radius:var(--radius-lg);font-family:var(--font-family);color:var(--color-text-primary);outline:none}.game-input-field:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-bg)}.game-result-emoji{font-size:48px;display:block;margin-bottom:var(--space-md)}.game-result-text{font-size:var(--font-size-lg);font-weight:600;color:var(--color-text-primary)}.game-result-answer{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-top:var(--space-xs)}@media(max-width:768px){.rest-options-grid{grid-template-columns:1fr;gap:var(--space-md)}.timer-choices{gap:var(--space-md)}.timer-choice-btn{width:80px;height:80px}}.parent-login{height:100%;display:flex;align-items:center;justify-content:center}.parent-lock-card{background:var(--color-bg-card);border-radius:var(--radius-2xl);padding:var(--space-2xl) var(--space-2xl);box-shadow:var(--shadow-lg);text-align:center;max-width:380px;width:100%}.lock-icon{font-size:56px;margin-bottom:var(--space-md)}.lock-title{font-size:var(--font-size-2xl);font-weight:700;margin-bottom:var(--space-sm)}.lock-desc{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-bottom:var(--space-xl)}.lock-form{display:flex;flex-direction:column;gap:var(--space-md)}.lock-input{text-align:center;font-size:var(--font-size-lg)!important;letter-spacing:4px}.lock-error{font-size:var(--font-size-sm);color:var(--color-accent);font-weight:500}.lock-btn{width:100%}.lock-hint{margin-top:var(--space-md);font-size:var(--font-size-xs);color:var(--color-text-muted)}.parent-dashboard{overflow-y:auto;height:100%;padding-bottom:var(--space-xl)}.parent-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--space-lg)}.range-toggle{display:flex;gap:2px;background:var(--color-border-light);border-radius:var(--radius-md);padding:3px}.range-btn{padding:6px 18px;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--color-text-secondary);font-size:var(--font-size-sm);font-family:var(--font-family);cursor:pointer;transition:all var(--transition-fast)}.range-btn.active{background:#fff;color:var(--color-primary);font-weight:600;box-shadow:var(--shadow-sm)}.parent-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-md);margin-bottom:var(--space-lg)}.parent-stat-card{background:var(--color-bg-card);border-radius:var(--radius-xl);padding:var(--space-lg);box-shadow:var(--shadow-card);display:flex;align-items:center;gap:var(--space-md);transition:transform var(--transition-fast)}.parent-stat-card:hover{transform:translateY(-2px)}.parent-stat-icon{width:48px;height:48px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}.parent-stat-num{font-size:var(--font-size-xl);font-weight:700;color:var(--color-text-primary)}.parent-stat-label{font-size:var(--font-size-xs);color:var(--color-text-muted)}.parent-charts-row{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-lg);margin-bottom:var(--space-lg)}.bar-chart{display:flex;align-items:flex-end;justify-content:space-around;height:180px;padding-top:var(--space-md)}.bar-chart-col{display:flex;flex-direction:column;align-items:center;gap:var(--space-xs);flex:1}.bar-wrapper{width:28px;height:140px;background:var(--color-border-light);border-radius:var(--radius-sm);display:flex;align-items:flex-end;overflow:hidden}.bar-fill{width:100%;background:var(--color-primary-gradient);border-radius:var(--radius-sm);transition:height .5s ease;min-height:4px}.bar-label{font-size:10px;color:var(--color-text-muted)}.mastery-list{display:flex;flex-direction:column;gap:var(--space-sm)}.mastery-row{display:flex;align-items:center;gap:var(--space-sm)}.mastery-name{font-size:var(--font-size-sm);color:var(--color-text-primary);min-width:90px;flex-shrink:0}.mastery-bar-outer{flex:1;height:10px;background:var(--color-border-light);border-radius:var(--radius-full);overflow:hidden}.mastery-bar-inner{height:100%;border-radius:var(--radius-full);transition:width .8s ease}.mastery-percent{font-size:var(--font-size-xs);font-weight:600;color:var(--color-text-secondary);min-width:36px;text-align:right}.parent-footer{text-align:center;margin-top:var(--space-lg)}.parent-tabs{display:flex;gap:var(--space-xs);margin-bottom:var(--space-lg);background:var(--color-bg-app);border-radius:var(--radius-lg);padding:4px;overflow-x:auto}.parent-tab{display:flex;align-items:center;gap:6px;padding:10px 16px;border:none;border-radius:var(--radius-md);background:transparent;color:var(--color-text-secondary);font-size:var(--font-size-sm);font-family:var(--font-family);cursor:pointer;transition:all var(--transition-fast);white-space:nowrap}.parent-tab:hover{background:var(--color-primary-bg);color:var(--color-primary)}.parent-tab.active{background:var(--color-primary-gradient);color:#fff;box-shadow:var(--shadow-sm);font-weight:600}.parent-tab-emoji{font-size:16px}.parent-section-card{background:var(--color-bg-card);border-radius:var(--radius-xl);padding:var(--space-xl);box-shadow:var(--shadow-card);margin-bottom:var(--space-lg)}.chat-structured{display:flex;flex-direction:column;gap:10px}.chat-structured .chat-text{margin:0;line-height:1.6;font-size:var(--font-size-sm);color:var(--color-text-primary)}.chat-question-card{background:linear-gradient(135deg,#f8f0ff,#e8f4fd);border:1.5px solid rgba(138,103,230,.2);border-radius:var(--radius-lg);padding:12px 16px;position:relative;overflow:hidden}.chat-question-card:before{content:"📐";position:absolute;top:-4px;right:8px;font-size:28px;opacity:.15}.chat-q-title{font-size:var(--font-size-sm);font-weight:700;color:var(--color-primary);margin-bottom:6px;display:flex;align-items:center;gap:6px}.chat-q-title:before{content:"";width:4px;height:16px;background:var(--color-primary-gradient);border-radius:2px}.chat-q-content{font-size:var(--font-size-sm);color:var(--color-text-primary);line-height:1.7;white-space:pre-wrap}.chat-q-hints{margin-top:8px;display:flex;flex-direction:column;gap:4px}.chat-q-hint{font-size:var(--font-size-xs);color:var(--color-text-secondary);background:#fff9;padding:4px 10px;border-radius:var(--radius-md);border-left:3px solid var(--color-warning)}.chat-steps{display:flex;flex-direction:column;gap:6px}.chat-step{display:flex;align-items:flex-start;gap:8px;font-size:var(--font-size-sm)}.chat-step-num{width:22px;height:22px;border-radius:50%;background:var(--color-primary-gradient);color:#fff;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:1px}.chat-step-text{color:var(--color-text-primary);line-height:1.5}.chat-action-hint{font-size:var(--font-size-xs);color:var(--color-primary);background:var(--color-primary-bg);padding:6px 12px;border-radius:var(--radius-md);font-weight:500;cursor:pointer;transition:all var(--transition-fast)}.chat-action-hint:hover{background:var(--color-primary-lighter);color:#fff}