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var(--transition-fast);box-shadow:var(--shadow-lg);border:1px solid var(--color-border)}.graph-controls button:hover{background:#1e293bf2;color:var(--color-text-primary);transform:scale(1.05)}.hover-tooltip{position:absolute;bottom:var(--spacing-lg);left:50%;transform:translate(-50%);max-width:400px;background:#0f172af2;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:var(--radius-lg);padding:var(--spacing-md);z-index:50;box-shadow:var(--shadow-xl);border:1px solid var(--color-border);animation:fadeInUp .2s ease}@keyframes fadeInUp{0%{opacity:0;transform:translate(-50%) translateY(10px)}to{opacity:1;transform:translate(-50%) 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