.area { fill: steelblue; }
.zoom { cursor: move; fill: none; pointer-events: all; }
#viz-container { background: var(--bs-body-bg); padding: 1rem; border-radius: 0.5rem; }
#viz-container svg { max-width: 100%; height: auto; }
.axis text { fill: var(--bs-body-color); }
.axis path, .axis line { stroke: var(--bs-body-color); }