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var(--space-3);border-radius:var(--radius-md);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);transition:all var(--transition-fast)}.header-btn:hover{background:var(--color-accent-subtle);color:var(--color-accent)}.header-btn svg{width:20px;height:20px}.header-btn--quiz{background:var(--color-accent);color:var(--color-accent-text);padding:var(--space-2) var(--space-4);border-radius:var(--radius-full)}.header-btn--quiz:hover{background:var(--color-accent-hover);color:var(--color-accent-text)}.hamburger-btn{display:none;padding:var(--space-2)}.hamburger-btn svg{width:24px;height:24px;color:var(--color-text-primary)}#app-layout{display:flex;flex:1}#app-sidebar{width:var(--sidebar-width);flex-shrink:0;background:var(--color-surface);border-right:1px solid var(--color-border);height:calc(100vh - var(--header-height));position:sticky;top:var(--header-height);overflow-y:auto;padding:var(--space-4) 0;transition:background-color 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svg{width:18px;height:18px}.category-section{margin-bottom:var(--space-10)}.category-section-header{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-5);padding-bottom:var(--space-3);border-bottom:2px solid var(--color-border-light)}.category-section-header .cat-icon{width:36px;height:36px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:var(--font-size-lg);color:#fff}.category-section-header h2{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold)}.category-section-header .cat-en{font-size:var(--font-size-sm);color:var(--color-text-tertiary);font-weight:var(--font-weight-normal)}.term-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:var(--space-4)}.term-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-5);cursor:pointer;transition:all var(--transition-normal);position:relative;overflow:hidden}.term-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;transition:height var(--transition-normal)}.term-card:hover{border-color:var(--color-border);box-shadow:var(--shadow-md);transform:translateY(-2px)}.term-card:hover:before{height:4px}.term-card-preview{width:100%;height:100px;background:var(--color-surface-elevated);border-radius:var(--radius-sm);margin-bottom:var(--space-4);display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}.term-card-name-ja{font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-1)}.term-card-name-en{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-bottom:var(--space-3)}.term-card-tag{display:inline-block;font-size:var(--font-size-xs);font-weight:var(--font-weight-medium);padding:2px 10px;border-radius:var(--radius-full);color:#fff}.term-list{display:flex;flex-direction:column;gap:var(--space-2)}.term-list .term-card{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-3) var(--space-5)}.term-list .term-card-preview{width:64px;height:48px;margin-bottom:0;flex-shrink:0}.term-list .term-card-info{display:flex;align-items:center;gap:var(--space-4);flex:1}.term-list .term-card-name-ja{margin-bottom:0;min-width:140px}.term-list .term-card-name-en{margin-bottom:0}.term-list .term-card-tag{margin-left:auto}.detail-page{max-width:800px}.breadcrumb{display:flex;align-items:center;gap:var(--space-2);font-size:var(--font-size-sm);color:var(--color-text-tertiary);margin-bottom:var(--space-6);flex-wrap:wrap}.breadcrumb a{color:var(--color-text-secondary);transition:color var(--transition-fast)}.breadcrumb a:hover{color:var(--color-accent)}.breadcrumb .sep{color:var(--color-border)}.breadcrumb 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h2{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-4);display:flex;align-items:center;gap:var(--space-2)}.detail-section h2 .section-icon{font-size:var(--font-size-xl)}.demo-container{background:var(--color-surface-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-8);min-height:200px;display:flex;align-items:center;justify-content:center;position:relative}.demo-placeholder{text-align:center;color:var(--color-text-tertiary)}.demo-placeholder .demo-icon{font-size:3rem;margin-bottom:var(--space-3);opacity:.5}.demo-placeholder p{font-size:var(--font-size-sm)}.desc-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-5);margin-bottom:var(--space-3)}.desc-card h3{font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);color:var(--color-text-secondary);margin-bottom:var(--space-2);text-transform:uppercase;letter-spacing:.03em}.desc-card p{font-size:var(--font-size-base);line-height:var(--line-height-relaxed)}.casual-desc{background:var(--color-accent-subtle);border-color:var(--color-accent);border-left:4px solid var(--color-accent)}.casual-desc .casual-label{display:inline-flex;align-items:center;gap:var(--space-1);font-size:var(--font-size-xs);font-weight:var(--font-weight-medium);color:var(--color-accent);margin-bottom:var(--space-2);padding:2px 8px;border-radius:var(--radius-full);background:var(--color-surface)}.confusion-list{display:flex;flex-direction:column;gap:var(--space-3)}.confusion-item{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4)}.confusion-item 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var(--color-border);border-radius:var(--radius-sm);transition:all var(--transition-fast)}.ai-prompt-box .copy-btn:hover{color:var(--color-accent);border-color:var(--color-accent)}.related-terms{display:flex;gap:var(--space-3);overflow-x:auto;padding-bottom:var(--space-2);-webkit-overflow-scrolling:touch}.related-term-card{flex-shrink:0;width:180px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:var(--space-4);cursor:pointer;transition:all var(--transition-fast)}.related-term-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-sm)}.related-term-card .rel-name-ja{font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);margin-bottom:var(--space-1)}.related-term-card .rel-name-en{font-size:var(--font-size-xs);color:var(--color-text-tertiary)}.quiz-page{max-width:640px;margin:0 auto}.quiz-setup{text-align:center}.quiz-setup 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p{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-bottom:0}.quiz-progress-bar{width:100%;height:6px;background:var(--color-border);border-radius:var(--radius-full);overflow:hidden}.quiz-progress-fill{height:100%;background:linear-gradient(90deg,var(--color-accent),#a855f7);border-radius:var(--radius-full);transition:width var(--transition-normal)}.quiz-progress-text{display:flex;justify-content:space-between;font-size:var(--font-size-sm);color:var(--color-text-secondary);margin-top:var(--space-2)}.quiz-question{text-align:center;margin-bottom:var(--space-8)}.quiz-question h2{font-size:var(--font-size-xl);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-2)}.quiz-choice{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-4) var(--space-5);background:var(--color-surface);border:2px solid 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var(--color-border);border-radius:var(--radius-md);gap:var(--space-4)}.demo-navbar-logo{width:24px;height:24px;border-radius:var(--radius-sm);background:var(--color-accent);flex-shrink:0}.demo-navbar-links{display:flex;gap:var(--space-1);flex:1;justify-content:center}.demo-navbar-link{padding:var(--space-1) var(--space-3);font-size:var(--font-size-xs);color:var(--color-text-secondary);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast);border:none;background:none;font-family:inherit}.demo-navbar-link:hover{color:var(--color-text-primary);background:var(--color-accent-subtle)}.demo-navbar-link.active{color:var(--color-accent);font-weight:var(--font-weight-medium)}.demo-hamburger-btn{width:48px;height:48px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;padding:0;transition:background var(--transition-fast)}.demo-hamburger-btn:hover{background:var(--color-accent-subtle)}.demo-hamburger-line{width:22px;height:2px;background:var(--color-text-primary);border-radius:1px;transition:all .3s cubic-bezier(.16,1,.3,1);transform-origin:center}.demo-hamburger-btn.open .demo-hamburger-line:nth-child(1){transform:translateY(7px) rotate(45deg)}.demo-hamburger-btn.open .demo-hamburger-line:nth-child(2){opacity:0;transform:scaleX(0)}.demo-hamburger-btn.open .demo-hamburger-line:nth-child(3){transform:translateY(-7px) rotate(-45deg)}.quiz-page{max-width:640px;margin:0 auto;padding:var(--space-6);animation:fadeInUp .3s ease}.quiz-setup h1{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);margin-bottom:var(--space-2);color:var(--color-text-primary)}.quiz-setup>p{color:var(--color-text-secondary);margin-bottom:var(--space-8);line-height:var(--line-height-relaxed)}.quiz-mode-cards{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-4);margin-bottom:var(--space-8)}@media(max-width:480px){.quiz-mode-cards{grid-template-columns:1fr}}.quiz-mode-card{background:var(--color-surface);border:2px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);text-align:center;cursor:pointer;transition:all .2s ease}.quiz-mode-card:hover{border-color:var(--color-accent);background:var(--color-accent-subtle);transform:translateY(-2px);box-shadow:var(--shadow-md)}.quiz-mode-card.selected{border-color:var(--color-accent);background:var(--color-accent-subtle);box-shadow:0 0 0 3px #6366f126}.quiz-mode-card .mode-icon{font-size:2.5rem;margin-bottom:var(--space-3)}.quiz-mode-card h3{font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-2);color:var(--color-text-primary)}.quiz-mode-card p{font-size:var(--font-size-sm);color:var(--color-text-secondary);line-height:var(--line-height-relaxed)}.quiz-config,.quiz-config-group{margin-bottom:var(--space-6)}.quiz-config-label{font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);color:var(--color-text-primary);margin-bottom:var(--space-3);display:block}.quiz-count-options{display:flex;gap:var(--space-2)}.quiz-count-btn{padding:var(--space-2) var(--space-5);border-radius:var(--radius-md);border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text-primary);font-size:var(--font-size-sm);font-family:inherit;cursor:pointer;transition:all var(--transition-fast)}.quiz-count-btn:hover{border-color:var(--color-accent);background:var(--color-accent-subtle)}.quiz-count-btn.active{background:var(--color-accent);color:#fff;border-color:var(--color-accent)}.quiz-cat-options{display:flex;flex-wrap:wrap;gap:var(--space-2)}.quiz-cat-btn{padding:var(--space-1) var(--space-3);border-radius:var(--radius-full);border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text-secondary);font-size:var(--font-size-xs);font-family:inherit;cursor:pointer;transition:all var(--transition-fast);display:flex;align-items:center;gap:var(--space-1)}.quiz-cat-btn:hover{border-color:var(--color-accent)}.quiz-cat-btn.active{background:var(--color-accent);color:#fff;border-color:var(--color-accent)}.quiz-cat-dot{width:8px;height:8px;border-radius:50%;display:inline-block}.quiz-start-btn{width:100%;padding:var(--space-4);border-radius:var(--radius-md);background:var(--color-accent);color:#fff;font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);font-family:inherit;border:none;cursor:pointer;transition:all var(--transition-fast)}.quiz-start-btn:hover{background:var(--color-accent-hover);box-shadow:var(--shadow-md)}.quiz-start-btn:disabled{opacity:.5;cursor:not-allowed}.quiz-progress{margin-bottom:var(--space-6)}.quiz-progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-2);font-size:var(--font-size-sm);color:var(--color-text-secondary)}.quiz-progress-bar{width:100%;height:6px;background:var(--color-border);border-radius:3px;overflow:hidden}.quiz-progress-fill{height:100%;background:var(--color-accent);border-radius:3px;transition:width .4s cubic-bezier(.16,1,.3,1)}.quiz-question-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-6);margin-bottom:var(--space-4);animation:fadeInUp .3s 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ease;font-family:inherit;font-size:var(--font-size-sm);color:var(--color-text-primary);text-align:left;width:100%;line-height:var(--line-height-relaxed)}.quiz-choice:hover:not(.answered){border-color:var(--color-accent);background:var(--color-accent-subtle)}.quiz-choice-marker{width:24px;height:24px;border-radius:50%;border:2px solid var(--color-border);display:flex;align-items:center;justify-content:center;font-size:var(--font-size-xs);font-weight:var(--font-weight-semibold);color:var(--color-text-tertiary);flex-shrink:0;margin-top:1px;transition:all .2s ease}.quiz-choice:hover:not(.answered) .quiz-choice-marker{border-color:var(--color-accent);color:var(--color-accent)}.quiz-choice.answered{cursor:default;pointer-events:none}.quiz-choice.correct{border-color:#10b981;background:#10b98114}.quiz-choice.correct .quiz-choice-marker{background:#10b981;border-color:#10b981;color:#fff}.quiz-choice.wrong{border-color:#ef4444;background:#ef444414}.quiz-choice.wrong .quiz-choice-marker{background:#ef4444;border-color:#ef4444;color:#fff}.quiz-choice.dimmed{opacity:.5}.quiz-explanation{margin-top:var(--space-4);padding:var(--space-4);background:var(--color-surface-elevated);border-radius:var(--radius-md);border-left:3px solid var(--color-accent);font-size:var(--font-size-sm);color:var(--color-text-secondary);line-height:var(--line-height-relaxed);animation:fadeIn .3s ease}.quiz-explanation strong{color:var(--color-text-primary)}.quiz-next-btn{width:100%;padding:var(--space-3);margin-top:var(--space-4);border-radius:var(--radius-md);background:var(--color-accent);color:#fff;font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);font-family:inherit;border:none;cursor:pointer;transition:all var(--transition-fast);animation:fadeIn .3s ease}.quiz-next-btn:hover{background:var(--color-accent-hover)}.quiz-result{text-align:center;animation:fadeInUp .4s ease}.quiz-result-score{font-size:4rem;font-weight:var(--font-weight-bold);background:linear-gradient(135deg,var(--color-accent),#a855f7);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:var(--space-2);line-height:1.1}.quiz-result-label{font-size:var(--font-size-lg);color:var(--color-text-secondary);margin-bottom:var(--space-8)}.quiz-result-stats{display:flex;justify-content:center;gap:var(--space-8);margin-bottom:var(--space-8)}.quiz-result-stat{text-align:center}.quiz-result-stat .value{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);color:var(--color-text-primary)}.quiz-result-stat .label{font-size:var(--font-size-xs);color:var(--color-text-tertiary);margin-top:var(--space-1)}.quiz-result-message{font-size:var(--font-size-lg);margin-bottom:var(--space-6);padding:var(--space-4);background:var(--color-surface);border-radius:var(--radius-md);border:1px solid var(--color-border)}.quiz-wrong-list{text-align:left;margin-bottom:var(--space-6)}.quiz-wrong-list h3{font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-3);color:var(--color-text-primary)}.quiz-wrong-item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3);border-radius:var(--radius-md);background:var(--color-surface);border:1px solid var(--color-border);margin-bottom:var(--space-2);cursor:pointer;transition:all var(--transition-fast)}.quiz-wrong-item:hover{border-color:var(--color-accent);background:var(--color-accent-subtle)}.quiz-wrong-item .name-ja{font-weight:var(--font-weight-medium);color:var(--color-text-primary);font-size:var(--font-size-sm)}.quiz-wrong-item .name-en{font-size:var(--font-size-xs);color:var(--color-text-tertiary)}.quiz-result-actions{display:flex;gap:var(--space-3);justify-content:center}.quiz-result-actions .quiz-next-btn{width:auto;padding:var(--space-3) var(--space-8)}