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ease;display:flex;align-items:center;gap:.5rem}.select-all-btn:hover{background:var(--button-hover-bg);border-color:var(--primary-color);transform:translateY(-2px)}.select-all-btn.selected{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}.zen-categories-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:1.5rem}.zen-category-button{background:var(--button-bg);color:var(--text-color);border:2px solid var(--border-color);border-radius:8px;padding:1rem;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;align-items:center;gap:.5rem;text-align:center;min-height:80px}.zen-category-button:hover{background:var(--button-hover-bg);border-color:var(--primary-color);transform:translateY(-2px)}.zen-category-button.selected{background:var(--primary-color);border-color:var(--primary-color);color:#fff}.zen-category-button i{font-size:1.5rem}.zen-category-button span{font-size:.9rem;font-weight:500}.zen-category-actions{display:flex;justify-content:center;margin-top:1rem}.zen-start-btn{background:var(--primary-color);color:#fff;border:2px solid var(--primary-color);border-radius:8px;padding:.75rem 2rem;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:.5rem}.zen-start-btn:hover{background:var(--primary-color-hover);border-color:var(--primary-color-hover);transform:translateY(-2px)}.zen-start-btn:disabled{background:var(--button-disabled-bg);color:var(--text-disabled);border-color:var(--border-color);cursor:not-allowed;opacity:.5}.zen-start-btn:disabled:hover{background:var(--button-disabled-bg);border-color:var(--border-color);transform:none}.zen-category-content{background:var(--bg-secondary);border:2px solid var(--accent-primary);border-radius:16px;padding:1.5rem;max-width:600px;width:90%;box-shadow:0 20px 40px #0000004d;animation:slideIn .3s ease-out}.zen-category-selector h2{color:var(--text-primary);text-align:center;margin-bottom:8px;font-size:2rem;font-weight:700}.zen-category-selector p{color:var(--text-secondary);text-align:center;margin-bottom:24px;font-size:1.1rem}.category-controls{display:flex;justify-content:center;margin-bottom:24px}.select-all-btn{background:var(--surface-2);border:2px solid var(--surface-3);color:var(--text-primary);padding:12px 24px;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:8px}.select-all-btn:hover{background:var(--surface-3);border-color:var(--accent-primary);transform:translateY(-2px)}.select-all-btn.selected{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff}.categories-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:.75rem;margin-bottom:1.5rem}.category-card{background:var(--bg-tertiary);border:2px solid var(--border-color);border-radius:8px;padding:1rem;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;align-items:center;gap:.5rem;text-align:center;min-height:80px}.category-card:hover{background:var(--bg-hover);border-color:var(--accent-secondary);transform:translateY(-1px)}.category-card.selected{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff}.category-card i{font-size:1.2rem;color:var(--accent-primary)}.category-card.selected i{color:#fff}.category-card span{font-size:.8rem;font-weight:500;color:var(--text-primary)}.category-card.selected span{color:#fff}.category-icon{font-size:2.5rem;min-width:60px;text-align:center}.category-info{flex:1}.zen-category-content h3{color:var(--text-primary);margin:0 0 1.5rem;text-align:center;font-size:1.4rem;font-weight:600}.difficulty-badge{display:inline-block;padding:4px 12px;border-radius:12px;font-size:.75rem;font-weight:600;text-transform:uppercase;color:#fff;letter-spacing:.5px}.selection-indicator{font-size:1.5rem;color:var(--text-secondary);transition:all .2s ease}.category-card.selected .selection-indicator{color:#fff}.category-card:not(.selected) .selection-indicator{opacity:.5}.zen-actions{display:flex;justify-content:space-between;gap:1rem}.zen-cancel-btn,.zen-start-btn{padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:.9rem;font-weight:600;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:.5rem}.zen-cancel-btn{background:var(--bg-tertiary);color:var(--text-primary);border:2px solid var(--border-color);cursor:pointer}.zen-cancel-btn:hover{background:var(--bg-hover);border-color:var(--accent-secondary);cursor:pointer}.zen-start-btn{background:var(--accent-primary);color:#fff;border:2px solid var(--accent-primary);flex:1;justify-content:center}.zen-start-btn:hover{background:var(--accent-secondary);border-color:var(--accent-secondary);cursor:pointer}.zen-start-btn.disabled{background:var(--bg-tertiary);color:var(--text-secondary);border-color:var(--border-color);cursor:not-allowed}.zen-start-btn.disabled:hover{background:var(--bg-tertiary);border-color:var(--border-color);transform:none}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(40px)}to{opacity:1;transform:translateY(0)}}@media(max-width:768px){.zen-category-selector{margin:16px;padding:24px;max-height:90vh}.categories-grid{grid-template-columns:1fr}.zen-selector-actions{flex-direction:column}.zen-start-btn{max-width:none}}