diff --git a/campaign-tracker-client/src/workspace/WorkspaceShell.css b/campaign-tracker-client/src/workspace/WorkspaceShell.css
new file mode 100644
index 0000000..d396a7f
--- /dev/null
+++ b/campaign-tracker-client/src/workspace/WorkspaceShell.css
@@ -0,0 +1,179 @@
+.workspace-shell {
+  min-height: 100vh;
+  background: #f7f9fc;
+  color: #111827;
+}
+
+.workspace-shell :where(button, a, input, textarea, select, [tabindex]):focus-visible {
+  outline: 2px solid var(--workspace-focus);
+  outline-offset: 2px;
+}
+
+.workspace-nav {
+  border-right: 1px solid var(--workspace-border);
+  overflow: auto;
+}
+
+.workspace-brand {
+  padding: 16px 16px 12px;
+  border-bottom: 1px solid var(--workspace-border);
+}
+
+.workspace-brand h1,
+.workspace-inspector h2,
+.workspace-board h2 {
+  margin: 0;
+}
+
+.workspace-brand h1 {
+  font-size: 22px;
+  line-height: 30px;
+}
+
+.workspace-brand__eyebrow,
+.workspace-kicker {
+  color: var(--workspace-secondary);
+  display: block;
+  font-size: 12px;
+  font-weight: 700;
+  letter-spacing: 0;
+  text-transform: uppercase;
+}
+
+.workspace-main {
+  min-width: 0;
+}
+
+.workspace-header {
+  align-items: center;
+  border-bottom: 1px solid var(--workspace-border);
+  display: flex;
+  height: 48px;
+  justify-content: space-between;
+  padding: 0 16px;
+}
+
+.workspace-content {
+  overflow: auto;
+  padding: 16px;
+}
+
+.workspace-support-notice {
+  margin-bottom: 12px;
+}
+
+.workspace-board {
+  background: var(--workspace-surface);
+  border: 1px solid var(--workspace-border);
+  border-radius: 4px;
+  min-width: 0;
+}
+
+.workspace-board__header,
+.workspace-board__footer {
+  align-items: center;
+  display: flex;
+  gap: 16px;
+  justify-content: space-between;
+  padding: 12px 16px;
+}
+
+.workspace-board__header {
+  border-bottom: 1px solid var(--workspace-border);
+}
+
+.workspace-board__footer {
+  border-top: 1px solid var(--workspace-border);
+}
+
+.workspace-table .ant-table {
+  border-radius: 0;
+}
+
+.workspace-status {
+  align-items: center;
+  background: #ffffff;
+  display: inline-flex;
+  gap: 5px;
+  line-height: 20px;
+  margin-inline-end: 0;
+}
+
+.workspace-row--blocked > td {
+  background: #fff7f7;
+}
+
+.workspace-inspector {
+  border-left: 1px solid var(--workspace-border);
+  overflow: auto;
+  padding: 12px;
+}
+
+.workspace-inspector--rail {
+  align-items: start;
+  display: flex;
+  justify-content: center;
+  padding: 12px 4px;
+}
+
+.workspace-inspector__header {
+  align-items: start;
+  display: flex;
+  gap: 8px;
+  justify-content: space-between;
+  margin-bottom: 12px;
+}
+
+.workspace-risk-list {
+  width: 100%;
+}
+
+.workspace-risk-item {
+  border: 1px solid var(--workspace-border);
+  border-radius: 4px;
+  display: grid;
+  gap: 8px;
+  padding: 10px;
+}
+
+.workspace-risk-item__id {
+  color: var(--workspace-text-secondary);
+  display: block;
+  font-family: 'IBM Plex Mono', Consolas, monospace;
+  font-size: 12px;
+}
+
+@media (min-width: 1280px) and (max-width: 1599px) {
+  .workspace-inspector:not(.workspace-inspector--rail) {
+    max-width: 288px;
+  }
+
+  .workspace-content {
+    padding: 12px;
+  }
+}
+
+@media (max-width: 1279px) {
+  .workspace-nav,
+  .workspace-inspector {
+    display: none;
+  }
+
+  .workspace-header {
+    align-items: start;
+    flex-direction: column;
+    gap: 8px;
+    height: auto;
+    padding: 12px;
+  }
+
+  .workspace-content {
+    padding: 12px;
+  }
+
+  .workspace-board__header,
+  .workspace-board__footer {
+    align-items: start;
+    flex-direction: column;
+  }
+}