diff --git a/dc.css b/dc.css
index c046cd72b..53e916910 100644
--- a/dc.css
+++ b/dc.css
@@ -83,14 +83,14 @@ div.dc-chart {
     font: 10px sans-serif;
 }
 
-.dc-chart .grid-line {
+.dc-chart .axis .grid-line {
     fill: none;
     stroke: #ccc;
     opacity: .5;
     shape-rendering: crispEdges;
 }
 
-.dc-chart .grid-line line {
+.dc-chart .axis .grid-line line {
     fill: none;
     stroke: #ccc;
     opacity: .5;
diff --git a/dc.min.css b/dc.min.css
index beb40c923..6b3659f33 100644
--- a/dc.min.css
+++ b/dc.min.css
@@ -1 +1 @@
-div.dc-chart{float:left}.dc-chart rect.bar{stroke:none;cursor:pointer}.dc-chart rect.bar:hover{fill-opacity:.5}.dc-chart rect.stack1{stroke:none;fill:red}.dc-chart rect.stack2{stroke:none;fill:green}.dc-chart rect.deselected{stroke:none;fill:#ccc}.dc-chart .empty-chart .pie-slice path{fill:#FEE;cursor:default}.dc-chart .empty-chart .pie-slice{cursor:default}.dc-chart .pie-slice{fill:#fff;font-size:12px;cursor:pointer}.dc-chart .pie-slice.external{fill:#000}.dc-chart .pie-slice :hover,.dc-chart .pie-slice.highlight{fill-opacity:.8}.dc-chart .pie-path{fill:none;stroke-width:2px;stroke:#000;opacity:.4}.dc-chart .selected path{stroke-width:3;stroke:#ccc;fill-opacity:1}.dc-chart .deselected path{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .axis line,.dc-chart .axis path{fill:none;stroke:#000;shape-rendering:crispEdges}.dc-chart .axis text{font:10px sans-serif}.dc-chart .grid-line,.dc-chart .grid-line line{fill:none;stroke:#ccc;opacity:.5;shape-rendering:crispEdges}.dc-chart .brush rect.background{z-index:-999}.dc-chart .brush rect.extent{fill:#4682b4;fill-opacity:.125}.dc-chart .brush .resize path{fill:#eee;stroke:#666}.dc-chart path.line{fill:none;stroke-width:1.5px}.dc-chart circle.dot{stroke:none}.dc-chart g.dc-tooltip path{fill:none;stroke:grey;stroke-opacity:.8}.dc-chart path.area{fill-opacity:.3;stroke:none}.dc-chart .node{font-size:.7em;cursor:pointer}.dc-chart .node :hover{fill-opacity:.8}.dc-chart .selected circle{stroke-width:3;stroke:#ccc;fill-opacity:1}.dc-chart .deselected circle{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .bubble{stroke:none;fill-opacity:.6}.dc-data-count{float:right;margin-top:15px;margin-right:15px}.dc-data-count .filter-count,.dc-data-count .total-count{color:#3182bd;font-weight:700}.dc-chart g.state{cursor:pointer}.dc-chart g.state :hover{fill-opacity:.8}.dc-chart g.state path{stroke:#fff}.dc-chart g.deselected path{fill:grey}.dc-chart g.deselected text{display:none}.dc-chart g.county path{stroke:#fff;fill:none}.dc-chart g.debug rect{fill:#00f;fill-opacity:.2}.dc-chart g.row rect{fill-opacity:.8;cursor:pointer}.dc-chart g.row rect:hover{fill-opacity:.6}.dc-chart g.row text{fill:#fff;font-size:12px;cursor:pointer}.dc-chart .highlight,.dc-chart path.highlight{fill-opacity:1;stroke-opacity:1}.dc-legend{font-size:11px}.dc-legend-item{cursor:pointer}.dc-chart g.axis text{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;-o-user-select:none;user-select:none;pointer-events:none}.dc-chart path.highlight{stroke-width:3}.dc-chart .fadeout{fill-opacity:.2;stroke-opacity:.2}.dc-chart path.dc-symbol,g.dc-legend-item.fadeout{fill-opacity:.5;stroke-opacity:.5}.dc-hard .number-display{float:none}.dc-chart .box text{font:10px sans-serif;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;-o-user-select:none;user-select:none;pointer-events:none}.dc-chart .box circle,.dc-chart .box line{fill:#fff;stroke:#000;stroke-width:1.5px}.dc-chart .box rect{stroke:#000;stroke-width:1.5px}.dc-chart .box .center{stroke-dasharray:3,3}.dc-chart .box .outlier{fill:none;stroke:#ccc}.dc-chart .box.deselected .box{fill:#ccc}.dc-chart .box.deselected{opacity:.5}.dc-chart .symbol{stroke:none}.dc-chart .heatmap .box-group.deselected rect{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .heatmap g.axis text{pointer-events:all;cursor:pointer}
\ No newline at end of file
+div.dc-chart{float:left}.dc-chart rect.bar{stroke:none;cursor:pointer}.dc-chart rect.bar:hover{fill-opacity:.5}.dc-chart rect.stack1{stroke:none;fill:red}.dc-chart rect.stack2{stroke:none;fill:green}.dc-chart rect.deselected{stroke:none;fill:#ccc}.dc-chart .empty-chart .pie-slice path{fill:#FEE;cursor:default}.dc-chart .empty-chart .pie-slice{cursor:default}.dc-chart .pie-slice{fill:#fff;font-size:12px;cursor:pointer}.dc-chart .pie-slice.external{fill:#000}.dc-chart .pie-slice :hover,.dc-chart .pie-slice.highlight{fill-opacity:.8}.dc-chart .pie-path{fill:none;stroke-width:2px;stroke:#000;opacity:.4}.dc-chart .selected path{stroke-width:3;stroke:#ccc;fill-opacity:1}.dc-chart .deselected path{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .axis line,.dc-chart .axis path{fill:none;stroke:#000;shape-rendering:crispEdges}.dc-chart .axis text{font:10px sans-serif}.dc-chart .axis .grid-line,.dc-chart .axis .grid-line line{fill:none;stroke:#ccc;opacity:.5;shape-rendering:crispEdges}.dc-chart .brush rect.background{z-index:-999}.dc-chart .brush rect.extent{fill:#4682b4;fill-opacity:.125}.dc-chart .brush .resize path{fill:#eee;stroke:#666}.dc-chart path.line{fill:none;stroke-width:1.5px}.dc-chart circle.dot{stroke:none}.dc-chart g.dc-tooltip path{fill:none;stroke:grey;stroke-opacity:.8}.dc-chart path.area{fill-opacity:.3;stroke:none}.dc-chart .node{font-size:.7em;cursor:pointer}.dc-chart .node :hover{fill-opacity:.8}.dc-chart .selected circle{stroke-width:3;stroke:#ccc;fill-opacity:1}.dc-chart .deselected circle{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .bubble{stroke:none;fill-opacity:.6}.dc-data-count{float:right;margin-top:15px;margin-right:15px}.dc-data-count .filter-count,.dc-data-count .total-count{color:#3182bd;font-weight:700}.dc-chart g.state{cursor:pointer}.dc-chart g.state :hover{fill-opacity:.8}.dc-chart g.state path{stroke:#fff}.dc-chart g.deselected path{fill:grey}.dc-chart g.deselected text{display:none}.dc-chart g.county path{stroke:#fff;fill:none}.dc-chart g.debug rect{fill:#00f;fill-opacity:.2}.dc-chart g.row rect{fill-opacity:.8;cursor:pointer}.dc-chart g.row rect:hover{fill-opacity:.6}.dc-chart g.row text{fill:#fff;font-size:12px;cursor:pointer}.dc-chart .highlight,.dc-chart path.highlight{fill-opacity:1;stroke-opacity:1}.dc-legend{font-size:11px}.dc-legend-item{cursor:pointer}.dc-chart g.axis text{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;-o-user-select:none;user-select:none;pointer-events:none}.dc-chart path.highlight{stroke-width:3}.dc-chart .fadeout{fill-opacity:.2;stroke-opacity:.2}.dc-chart path.dc-symbol,g.dc-legend-item.fadeout{fill-opacity:.5;stroke-opacity:.5}.dc-hard .number-display{float:none}.dc-chart .box text{font:10px sans-serif;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;-o-user-select:none;user-select:none;pointer-events:none}.dc-chart .box circle,.dc-chart .box line{fill:#fff;stroke:#000;stroke-width:1.5px}.dc-chart .box rect{stroke:#000;stroke-width:1.5px}.dc-chart .box .center{stroke-dasharray:3,3}.dc-chart .box .outlier{fill:none;stroke:#ccc}.dc-chart .box.deselected .box{fill:#ccc}.dc-chart .box.deselected{opacity:.5}.dc-chart .symbol{stroke:none}.dc-chart .heatmap .box-group.deselected rect{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .heatmap g.axis text{pointer-events:all;cursor:pointer}
\ No newline at end of file
diff --git a/web/css/dc.css b/web/css/dc.css
index c046cd72b..53e916910 100644
--- a/web/css/dc.css
+++ b/web/css/dc.css
@@ -83,14 +83,14 @@ div.dc-chart {
     font: 10px sans-serif;
 }
 
-.dc-chart .grid-line {
+.dc-chart .axis .grid-line {
     fill: none;
     stroke: #ccc;
     opacity: .5;
     shape-rendering: crispEdges;
 }
 
-.dc-chart .grid-line line {
+.dc-chart .axis .grid-line line {
     fill: none;
     stroke: #ccc;
     opacity: .5;
diff --git a/web/css/dc.min.css b/web/css/dc.min.css
index beb40c923..6b3659f33 100644
--- a/web/css/dc.min.css
+++ b/web/css/dc.min.css
@@ -1 +1 @@
-div.dc-chart{float:left}.dc-chart rect.bar{stroke:none;cursor:pointer}.dc-chart rect.bar:hover{fill-opacity:.5}.dc-chart rect.stack1{stroke:none;fill:red}.dc-chart rect.stack2{stroke:none;fill:green}.dc-chart rect.deselected{stroke:none;fill:#ccc}.dc-chart .empty-chart .pie-slice path{fill:#FEE;cursor:default}.dc-chart .empty-chart .pie-slice{cursor:default}.dc-chart .pie-slice{fill:#fff;font-size:12px;cursor:pointer}.dc-chart .pie-slice.external{fill:#000}.dc-chart .pie-slice :hover,.dc-chart .pie-slice.highlight{fill-opacity:.8}.dc-chart .pie-path{fill:none;stroke-width:2px;stroke:#000;opacity:.4}.dc-chart .selected path{stroke-width:3;stroke:#ccc;fill-opacity:1}.dc-chart .deselected path{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .axis line,.dc-chart .axis path{fill:none;stroke:#000;shape-rendering:crispEdges}.dc-chart .axis text{font:10px sans-serif}.dc-chart .grid-line,.dc-chart .grid-line line{fill:none;stroke:#ccc;opacity:.5;shape-rendering:crispEdges}.dc-chart .brush rect.background{z-index:-999}.dc-chart .brush rect.extent{fill:#4682b4;fill-opacity:.125}.dc-chart .brush .resize path{fill:#eee;stroke:#666}.dc-chart path.line{fill:none;stroke-width:1.5px}.dc-chart circle.dot{stroke:none}.dc-chart g.dc-tooltip path{fill:none;stroke:grey;stroke-opacity:.8}.dc-chart path.area{fill-opacity:.3;stroke:none}.dc-chart .node{font-size:.7em;cursor:pointer}.dc-chart .node :hover{fill-opacity:.8}.dc-chart .selected circle{stroke-width:3;stroke:#ccc;fill-opacity:1}.dc-chart .deselected circle{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .bubble{stroke:none;fill-opacity:.6}.dc-data-count{float:right;margin-top:15px;margin-right:15px}.dc-data-count .filter-count,.dc-data-count .total-count{color:#3182bd;font-weight:700}.dc-chart g.state{cursor:pointer}.dc-chart g.state :hover{fill-opacity:.8}.dc-chart g.state path{stroke:#fff}.dc-chart g.deselected path{fill:grey}.dc-chart g.deselected text{display:none}.dc-chart g.county path{stroke:#fff;fill:none}.dc-chart g.debug rect{fill:#00f;fill-opacity:.2}.dc-chart g.row rect{fill-opacity:.8;cursor:pointer}.dc-chart g.row rect:hover{fill-opacity:.6}.dc-chart g.row text{fill:#fff;font-size:12px;cursor:pointer}.dc-chart .highlight,.dc-chart path.highlight{fill-opacity:1;stroke-opacity:1}.dc-legend{font-size:11px}.dc-legend-item{cursor:pointer}.dc-chart g.axis text{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;-o-user-select:none;user-select:none;pointer-events:none}.dc-chart path.highlight{stroke-width:3}.dc-chart .fadeout{fill-opacity:.2;stroke-opacity:.2}.dc-chart path.dc-symbol,g.dc-legend-item.fadeout{fill-opacity:.5;stroke-opacity:.5}.dc-hard .number-display{float:none}.dc-chart .box text{font:10px sans-serif;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;-o-user-select:none;user-select:none;pointer-events:none}.dc-chart .box circle,.dc-chart .box line{fill:#fff;stroke:#000;stroke-width:1.5px}.dc-chart .box rect{stroke:#000;stroke-width:1.5px}.dc-chart .box .center{stroke-dasharray:3,3}.dc-chart .box .outlier{fill:none;stroke:#ccc}.dc-chart .box.deselected .box{fill:#ccc}.dc-chart .box.deselected{opacity:.5}.dc-chart .symbol{stroke:none}.dc-chart .heatmap .box-group.deselected rect{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .heatmap g.axis text{pointer-events:all;cursor:pointer}
\ No newline at end of file
+div.dc-chart{float:left}.dc-chart rect.bar{stroke:none;cursor:pointer}.dc-chart rect.bar:hover{fill-opacity:.5}.dc-chart rect.stack1{stroke:none;fill:red}.dc-chart rect.stack2{stroke:none;fill:green}.dc-chart rect.deselected{stroke:none;fill:#ccc}.dc-chart .empty-chart .pie-slice path{fill:#FEE;cursor:default}.dc-chart .empty-chart .pie-slice{cursor:default}.dc-chart .pie-slice{fill:#fff;font-size:12px;cursor:pointer}.dc-chart .pie-slice.external{fill:#000}.dc-chart .pie-slice :hover,.dc-chart .pie-slice.highlight{fill-opacity:.8}.dc-chart .pie-path{fill:none;stroke-width:2px;stroke:#000;opacity:.4}.dc-chart .selected path{stroke-width:3;stroke:#ccc;fill-opacity:1}.dc-chart .deselected path{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .axis line,.dc-chart .axis path{fill:none;stroke:#000;shape-rendering:crispEdges}.dc-chart .axis text{font:10px sans-serif}.dc-chart .axis .grid-line,.dc-chart .axis .grid-line line{fill:none;stroke:#ccc;opacity:.5;shape-rendering:crispEdges}.dc-chart .brush rect.background{z-index:-999}.dc-chart .brush rect.extent{fill:#4682b4;fill-opacity:.125}.dc-chart .brush .resize path{fill:#eee;stroke:#666}.dc-chart path.line{fill:none;stroke-width:1.5px}.dc-chart circle.dot{stroke:none}.dc-chart g.dc-tooltip path{fill:none;stroke:grey;stroke-opacity:.8}.dc-chart path.area{fill-opacity:.3;stroke:none}.dc-chart .node{font-size:.7em;cursor:pointer}.dc-chart .node :hover{fill-opacity:.8}.dc-chart .selected circle{stroke-width:3;stroke:#ccc;fill-opacity:1}.dc-chart .deselected circle{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .bubble{stroke:none;fill-opacity:.6}.dc-data-count{float:right;margin-top:15px;margin-right:15px}.dc-data-count .filter-count,.dc-data-count .total-count{color:#3182bd;font-weight:700}.dc-chart g.state{cursor:pointer}.dc-chart g.state :hover{fill-opacity:.8}.dc-chart g.state path{stroke:#fff}.dc-chart g.deselected path{fill:grey}.dc-chart g.deselected text{display:none}.dc-chart g.county path{stroke:#fff;fill:none}.dc-chart g.debug rect{fill:#00f;fill-opacity:.2}.dc-chart g.row rect{fill-opacity:.8;cursor:pointer}.dc-chart g.row rect:hover{fill-opacity:.6}.dc-chart g.row text{fill:#fff;font-size:12px;cursor:pointer}.dc-chart .highlight,.dc-chart path.highlight{fill-opacity:1;stroke-opacity:1}.dc-legend{font-size:11px}.dc-legend-item{cursor:pointer}.dc-chart g.axis text{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;-o-user-select:none;user-select:none;pointer-events:none}.dc-chart path.highlight{stroke-width:3}.dc-chart .fadeout{fill-opacity:.2;stroke-opacity:.2}.dc-chart path.dc-symbol,g.dc-legend-item.fadeout{fill-opacity:.5;stroke-opacity:.5}.dc-hard .number-display{float:none}.dc-chart .box text{font:10px sans-serif;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;-o-user-select:none;user-select:none;pointer-events:none}.dc-chart .box circle,.dc-chart .box line{fill:#fff;stroke:#000;stroke-width:1.5px}.dc-chart .box rect{stroke:#000;stroke-width:1.5px}.dc-chart .box .center{stroke-dasharray:3,3}.dc-chart .box .outlier{fill:none;stroke:#ccc}.dc-chart .box.deselected .box{fill:#ccc}.dc-chart .box.deselected{opacity:.5}.dc-chart .symbol{stroke:none}.dc-chart .heatmap .box-group.deselected rect{stroke:none;fill-opacity:.5;fill:#ccc}.dc-chart .heatmap g.axis text{pointer-events:all;cursor:pointer}
\ No newline at end of file