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.central-object{display:flex;flex-direction:column;align-items:center;padding:20px 32px;background:#fff;border:3px solid #64748b;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);z-index:1}.object-arrow-diagram .central-object .object-emoji{font-size:2.5rem;margin-bottom:8px}.object-arrow-diagram .central-object .object-label{font-weight:600;color:var(--text-primary)}.object-arrow-diagram .diagram-arrow{display:flex;align-items:center;gap:8px;font-weight:600}.object-arrow-diagram .diagram-arrow .arrow-symbol{font-size:2.5rem}.object-arrow-diagram .diagram-arrow .arrow-label{font-size:.9rem}.object-arrow-diagram .diagram-arrow.left{flex-direction:row-reverse}.object-arrow-diagram .diagram-arrow.left .arrow-symbol{transform:rotate(180deg)}.object-arrow-diagram .diagram-arrow.up{flex-direction:column-reverse}.object-arrow-diagram .diagram-arrow.up .arrow-symbol{transform:rotate(-90deg)}.object-arrow-diagram .diagram-arrow.down{flex-direction:column}.object-arrow-diagram .diagram-arrow.down .arrow-symbol{transform:rotate(90deg)}.concept-card{text-align:center}.concept-card .concept-header{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:16px}.concept-card .concept-emoji{font-size:2.5rem}.concept-card .concept-title{font-size:1.25rem;font-weight:600;color:var(--text-primary)}.concept-card .concept-description{font-size:1rem;color:var(--text-secondary);line-height:1.6;margin-bottom:16px}.concept-card .concept-formula{font-family:Times New Roman,serif;font-size:1.2rem;padding:12px 24px;background:#fff;border-radius:var(--radius-md);border:1px solid var(--border);display:inline-block}.concept-card .concept-bullets{text-align:left;list-style:none;padding:0;margin:16px auto;max-width:400px}.concept-card .concept-bullets li{padding:8px 0 8px 24px;position:relative;color:var(--text-secondary)}.concept-card .concept-bullets li:before{content:"✓";position:absolute;left:0;color:#22c55e;font-weight:700}.side-by-side-diagram .side-by-side-content{display:flex;align-items:stretch;justify-content:center;gap:16px;padding:20px}.side-by-side-diagram .side-panel{flex:1;max-width:200px;display:flex;flex-direction:column;align-items:center;padding:20px;border-radius:var(--radius-lg);border:2px solid;text-align:center}.side-by-side-diagram .panel-emoji{font-size:2rem;margin-bottom:12px}.side-by-side-diagram .panel-title{font-size:1rem;font-weight:600;margin-bottom:8px}.side-by-side-diagram .panel-description{font-size:.85rem;color:var(--text-secondary);line-height:1.4}.side-by-side-diagram .connector{display:flex;align-items:center;font-size:1.25rem;font-weight:600;color:var(--text-secondary)}.diagram-description{padding:24px;background:#f8fafc;border-radius:var(--radius-lg);border:1px dashed var(--border)}.diagram-description .description-content{display:flex;align-items:flex-start;gap:12px}.diagram-description .description-icon{font-size:1.5rem}.diagram-description .description-content 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