diff --git a/static/style.css b/static/style.css
index 255d764..9386aff 100644
--- a/static/style.css
+++ b/static/style.css
@@ -98,6 +98,8 @@ th { background: var(--surface); font-weight: 600; }
 .rack-table .rack-cell { width: 45%; padding: 2px 0.4em; }
 .rack-table tr.device-start td { border-top: 2px solid #444; }
 .rack-table tr.device-start td.rack-cell { background: var(--surface); }
+.rack-table tr.device-row td.rack-cell { background: var(--surface); }
+.rack-table tr.device-row + tr:not(.device-row) td { border-top: 1px solid #555; }
 .rack-device { display: flex; flex-direction: column; padding: 0.15em 0; }
 .rack-device strong { font-size: 0.9em; }
 .rack-device small { font-size: 0.75em; }
diff --git a/templates/rack.html b/templates/rack.html
index 0cf32fe..322592a 100644
--- a/templates/rack.html
+++ b/templates/rack.html
@@ -24,7 +24,7 @@
 <thead><tr><th>U</th><th>Front</th><th>U</th><th>Back</th></tr></thead>
 <tbody>
 {{range $i, $fs := .FrontSlots}}
-<tr {{if or $fs.IsStart (index $.BackSlots $i).IsStart}}class="device-start"{{end}}>
+<tr class="{{if or $fs.IsStart (index $.BackSlots $i).IsStart}}device-start{{end}} {{if or $fs.Device (index $.BackSlots $i).Device}}device-row{{end}}">
     <td class="unit-num">{{$fs.Unit}}</td>
     <td class="rack-cell">
         {{if $fs.IsStart}}