.axis{stroke:#666;stroke-width:1.5;}.grid{stroke:#ddd;stroke-width:0.5;stroke-dasharray:4,4;}.line-h{fill:none;stroke-width:2;}.ref-line{fill:none;stroke:#888;stroke-width:1.5;stroke-dasharray:6,3;}.label{font-family:Arial,sans-serif;font-size:12px;fill:#333;}.title{font-family:Arial,sans-serif;font-size:14px;font-weight:bold;fill:#222;}.legend{font-family:Arial,sans-serif;font-size:11px;fill:#444;}