.chart-container{margin:2rem 0}.chart-placeholder{background:var(--color-background-alt,#f5f5f5);border:2px dashed var(--color-border,#ddd);border-radius:8px;padding:2rem;text-align:center}.chart-placeholder p{color:var(--color-text-muted,#666);font-size:1rem;margin:0}