diff --git a/services/web-ui/src/css/components/card-asset.css b/services/web-ui/src/css/components/card-asset.css
new file mode 100644
index 0000000..c509732
--- /dev/null
+++ b/services/web-ui/src/css/components/card-asset.css
@@ -0,0 +1,107 @@
+/* card-asset.css ─ 16:9 thumbnail + metadata + role pill.
+ * For Library, Project asset grids, recorder cards' video portion. */
+
+.wd-card-asset {
+  display: flex;
+  flex-direction: column;
+  background: var(--bg-panel);
+  border: 1px solid var(--border-faint);
+  border-radius: 6px;
+  overflow: hidden;
+  transition: border-color 120ms cubic-bezier(0.25, 1, 0.5, 1);
+}
+.wd-card-asset:hover {
+  border-color: var(--border);
+}
+
+.wd-card-asset-thumb {
+  position: relative;
+  width: 100%;
+  aspect-ratio: 16 / 9;
+  background: oklch(0% 0 0);
+  overflow: hidden;
+}
+.wd-card-asset-thumb img,
+.wd-card-asset-thumb video {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+  display: block;
+  transition: filter 120ms cubic-bezier(0.25, 1, 0.5, 1);
+}
+.wd-card-asset:hover .wd-card-asset-thumb img,
+.wd-card-asset:hover .wd-card-asset-thumb video {
+  filter: brightness(1.04);
+}
+
+.wd-card-asset-chip {
+  position: absolute;
+  font: 500 10px/1 var(--font-mono);
+  color: var(--text-primary);
+  background: oklch(8% 0.010 266 / 0.7);
+  border: 1px solid var(--border-faint);
+  border-radius: 3px;
+  padding: 3px 6px;
+  letter-spacing: 0.02em;
+}
+.wd-card-asset-chip--duration { bottom: 8px; right: 8px; }
+.wd-card-asset-chip--comments {
+  bottom: 8px; left: 8px;
+  display: inline-flex; align-items: center; gap: 4px;
+}
+.wd-card-asset-chip--version  { top: 8px; right: 8px; font-weight: 600; }
+
+.wd-card-asset-checkbox {
+  position: absolute;
+  top: 8px; left: 8px;
+  opacity: 0;
+  transition: opacity 120ms cubic-bezier(0.25, 1, 0.5, 1);
+}
+.wd-card-asset:hover .wd-card-asset-checkbox,
+.wd-card-asset.is-selected .wd-card-asset-checkbox,
+.wd-card-asset-grid.has-selection .wd-card-asset-checkbox { opacity: 1; }
+
+.wd-card-asset-meta {
+  padding: 8px;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  min-width: 0;
+}
+.wd-card-asset-name {
+  font: 500 13px/1.3 var(--font);
+  color: var(--text-primary);
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+.wd-card-asset-sub {
+  font: 400 11px/1.3 var(--font);
+  color: var(--text-tertiary);
+  font-variant-numeric: tabular-nums;
+}
+
+.wd-card-asset-role {
+  display: block;
+  width: 100%;
+  padding: 6px 8px;
+  border: 1px solid var(--border-faint);
+  border-top: 0;
+  background: var(--bg-deep);
+  font: 600 10px/1 var(--font);
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+  color: var(--text-secondary);
+  cursor: pointer;
+}
+.wd-card-asset-role--unset {
+  border-style: dashed;
+  color: var(--text-tertiary);
+}
+
+/* Grid container */
+.wd-card-asset-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
+  gap: 12px;
+}