diff --git a/services/web-ui/public/styles-asset.css b/services/web-ui/public/styles-asset.css
new file mode 100644
index 0000000..828bbb2
--- /dev/null
+++ b/services/web-ui/public/styles-asset.css
@@ -0,0 +1,389 @@
+/* ========== Asset detail ========== */
+.asset-detail {
+  display: flex; flex-direction: column;
+  height: 100%;
+  background: var(--bg-0);
+  overflow: hidden;
+}
+.asset-detail-header {
+  height: var(--topbar-h);
+  display: flex; align-items: center;
+  gap: 12px;
+  padding: 0 20px;
+  border-bottom: 1px solid var(--border);
+  flex-shrink: 0;
+}
+.asset-detail-body {
+  flex: 1;
+  display: grid;
+  grid-template-columns: 1fr 320px;
+  overflow: hidden;
+  min-height: 0;
+}
+.player-col {
+  display: flex; flex-direction: column;
+  overflow: hidden;
+  border-right: 1px solid var(--border);
+}
+.comment-composer-col {
+  background: var(--bg-1);
+  display: flex; flex-direction: column;
+  overflow: hidden;
+}
+
+.player {
+  background: #000;
+  padding: 16px;
+  display: flex; flex-direction: column;
+  gap: 8px;
+}
+.player-canvas {
+  position: relative;
+  aspect-ratio: 16 / 9;
+  border-radius: var(--r-md);
+  overflow: hidden;
+  background: #050608;
+  max-height: 52vh;
+}
+.player-canvas .thumb-svg { width: 100%; height: 100%; display: block; }
+.player-play-overlay {
+  position: absolute; inset: 0;
+  display: grid; place-items: center;
+  background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.4));
+  transition: background 120ms;
+}
+.player-play-overlay:hover { background: rgba(0,0,0,0.3); }
+.player-play-overlay svg {
+  width: 64px; height: 64px;
+  color: white;
+  background: rgba(0,0,0,0.55);
+  border-radius: 50%;
+  padding: 16px;
+  backdrop-filter: blur(8px);
+}
+.player-tc {
+  position: absolute;
+  right: 12px; bottom: 12px;
+  background: rgba(0,0,0,0.6);
+  backdrop-filter: blur(4px);
+  padding: 4px 10px;
+  border-radius: 4px;
+  font-family: var(--font-mono);
+  font-size: 11.5px;
+  color: white;
+}
+.player-overlay-markers {
+  position: absolute; inset: 16px;
+  pointer-events: none;
+}
+.player-pin {
+  position: absolute;
+  left: 30%; top: 40%;
+  display: flex; align-items: center; gap: 6px;
+  pointer-events: auto;
+}
+.player-pin-avatar {
+  width: 28px; height: 28px;
+  border-radius: 50%;
+  background: var(--accent);
+  display: grid; place-items: center;
+  font-size: 11px; font-weight: 600; color: white;
+  border: 2px solid white;
+}
+.player-pin-bubble {
+  background: var(--accent);
+  color: white;
+  font-size: 12px;
+  padding: 4px 8px;
+  border-radius: 4px;
+  max-width: 240px;
+}
+
+.player-controls {
+  display: flex; align-items: center; gap: 8px;
+  padding: 0 4px;
+}
+
+.playback-bar {
+  flex: 1;
+  height: 24px;
+  position: relative;
+  cursor: pointer;
+  display: flex; align-items: center;
+}
+.playback-bar::before {
+  content: "";
+  position: absolute;
+  left: 0; right: 0;
+  height: 4px;
+  background: rgba(255,255,255,0.08);
+  border-radius: 99px;
+}
+.playback-fill {
+  position: absolute;
+  height: 4px;
+  background: var(--accent);
+  border-radius: 99px;
+  pointer-events: none;
+}
+.playback-handle {
+  position: absolute;
+  width: 12px; height: 12px;
+  border-radius: 50%;
+  background: white;
+  transform: translateX(-50%);
+  box-shadow: 0 0 0 1px rgba(0,0,0,0.2);
+  pointer-events: none;
+}
+.playback-marker {
+  position: absolute;
+  transform: translateX(-50%) translateY(-2px);
+  z-index: 2;
+}
+.marker-avatar {
+  display: grid; place-items: center;
+  width: 18px; height: 18px;
+  border-radius: 50%;
+  background: var(--accent);
+  color: white;
+  font-size: 9px; font-weight: 600;
+  border: 1.5px solid var(--bg-0);
+}
+.playback-marker.resolved .marker-avatar { background: var(--text-4); opacity: 0.5; }
+
+.filmstrip-wrap {
+  background: var(--bg-1);
+  border-radius: var(--r-sm);
+  padding: 8px;
+  margin-top: 4px;
+}
+.filmstrip {
+  position: relative;
+  display: flex;
+  gap: 1px;
+  height: 48px;
+  border-radius: 4px;
+  overflow: hidden;
+  cursor: pointer;
+  border: 1px solid var(--border);
+}
+.film-frame {
+  flex: 1;
+  position: relative;
+  overflow: hidden;
+}
+.film-frame .thumb-svg { width: 100%; height: 100%; }
+.filmstrip-playhead {
+  position: absolute;
+  top: 0; bottom: 0;
+  width: 2px;
+  background: var(--accent);
+  transform: translateX(-50%);
+  pointer-events: none;
+  box-shadow: 0 0 6px var(--accent);
+}
+.filmstrip-playhead::before {
+  content: "";
+  position: absolute;
+  top: -4px; left: 50%;
+  transform: translateX(-50%);
+  width: 8px; height: 8px;
+  background: var(--accent);
+  border-radius: 2px;
+  transform: translateX(-50%) rotate(45deg);
+}
+.filmstrip-pin {
+  position: absolute;
+  bottom: -6px;
+  transform: translateX(-50%);
+}
+.filmstrip-pin-avatar {
+  display: grid; place-items: center;
+  width: 16px; height: 16px;
+  border-radius: 50%;
+  background: var(--accent);
+  color: white;
+  font-size: 8px;
+  font-weight: 600;
+  border: 1.5px solid var(--bg-1);
+}
+.filmstrip-pin.resolved .filmstrip-pin-avatar { background: var(--text-4); }
+.filmstrip-tc {
+  display: flex;
+  justify-content: space-between;
+  margin-top: 6px;
+  padding: 0 2px;
+  font-size: 10px;
+  color: var(--text-4);
+}
+
+.asset-detail-tabs {
+  display: flex;
+  align-items: center;
+  padding: 0 20px;
+  height: 40px;
+  border-top: 1px solid var(--border);
+  border-bottom: 1px solid var(--border);
+  gap: 4px;
+  background: var(--bg-0);
+  flex-shrink: 0;
+}
+.asset-detail-tabs button {
+  height: 40px;
+  padding: 0 12px;
+  font-size: 12.5px;
+  font-weight: 500;
+  color: var(--text-3);
+  position: relative;
+  display: flex; align-items: center; gap: 6px;
+}
+.asset-detail-tabs button:hover { color: var(--text-1); }
+.asset-detail-tabs button.active { color: var(--text-1); }
+.asset-detail-tabs button.active::after {
+  content: ""; position: absolute;
+  bottom: -1px; left: 8px; right: 8px;
+  height: 2px; background: var(--accent);
+}
+.asset-detail-tabs .count {
+  font-family: var(--font-mono);
+  font-size: 10.5px;
+  background: var(--bg-3);
+  padding: 0 6px;
+  border-radius: 99px;
+  color: var(--text-3);
+}
+.asset-detail-tabs button.active .count { background: var(--accent-soft); color: var(--accent-text); }
+.tiny-toggle {
+  display: flex; align-items: center; gap: 5px;
+  font-size: 11.5px;
+  color: var(--text-3);
+  cursor: pointer;
+}
+.tiny-toggle input { accent-color: var(--accent); }
+
+.asset-detail-content {
+  flex: 1;
+  overflow-y: auto;
+  padding: 8px 20px 20px;
+}
+
+.comments-list { display: flex; flex-direction: column; gap: 4px; }
+.comment {
+  display: flex; gap: 10px;
+  padding: 12px 0;
+  border-bottom: 1px solid var(--border);
+}
+.comment.resolved { opacity: 0.55; }
+.comment-avatar {
+  width: 28px; height: 28px;
+  border-radius: 50%;
+  font-size: 10.5px;
+  font-weight: 600;
+  color: white;
+  display: grid; place-items: center;
+  flex-shrink: 0;
+}
+.comment-body { flex: 1; min-width: 0; }
+.comment-head {
+  display: flex; align-items: center; gap: 8px;
+  font-size: 12px;
+}
+.comment-who { font-weight: 600; }
+.comment-time {
+  display: inline-flex; align-items: center; gap: 3px;
+  background: var(--accent-soft);
+  color: var(--accent-text);
+  padding: 1px 6px;
+  border-radius: 99px;
+  font-family: var(--font-mono);
+  font-size: 10.5px;
+  cursor: pointer;
+}
+.comment-time:hover { background: var(--accent-soft-2); }
+.comment-when { color: var(--text-3); font-size: 11px; }
+.comment-action { color: var(--text-3); }
+.comment-action:hover { color: var(--text-1); }
+.comment-text {
+  font-size: 12.5px;
+  color: var(--text-1);
+  margin-top: 4px;
+  line-height: 1.5;
+}
+.comment-resolved {
+  font-size: 11px;
+  color: var(--success);
+  margin-top: 4px;
+}
+
+.comment-composer {
+  padding: 16px;
+  display: flex; flex-direction: column;
+  gap: 10px;
+  height: 100%;
+}
+.composer-head {
+  display: flex; align-items: center; justify-content: space-between;
+}
+.avatar-stack { display: flex; }
+.avatar-stack .avatar { margin-left: -6px; border: 2px solid var(--bg-1); }
+.avatar-stack .avatar:first-child { margin-left: 0; }
+.add-reviewer {
+  width: 22px; height: 22px;
+  border-radius: 50%;
+  background: var(--bg-3);
+  border: 1.5px dashed var(--border-stronger);
+  display: grid; place-items: center;
+  color: var(--text-3);
+  margin-left: -2px;
+}
+.composer-tag {
+  display: flex; align-items: center; gap: 8px;
+  font-size: 11.5px;
+}
+.composer-input {
+  width: 100%;
+  min-height: 90px;
+  background: var(--bg-2);
+  border: 1px solid var(--border);
+  border-radius: var(--r-md);
+  padding: 10px 12px;
+  outline: 0;
+  font-size: 13px;
+  resize: vertical;
+  color: var(--text-1);
+}
+.composer-input:focus { border-color: var(--accent); }
+.composer-bar {
+  display: flex; align-items: center; gap: 8px;
+}
+.composer-tools { display: flex; gap: 2px; }
+
+.versions-list { display: flex; flex-direction: column; gap: 8px; padding: 12px 0; }
+.version-row {
+  display: flex; align-items: center; gap: 12px;
+  padding: 12px;
+  border: 1px solid var(--border);
+  border-radius: var(--r-md);
+  background: var(--bg-1);
+}
+.version-thumb {
+  width: 120px; aspect-ratio: 16/9;
+  border-radius: 4px;
+  overflow: hidden;
+  background: var(--bg-2);
+}
+
+.meta-table {
+  display: flex; flex-direction: column;
+  padding: 8px 0;
+}
+.meta-row {
+  display: grid;
+  grid-template-columns: 180px 1fr;
+  padding: 8px 0;
+  border-bottom: 1px solid var(--border);
+  font-size: 12.5px;
+  gap: 16px;
+}
+.meta-row .meta-k { color: var(--text-3); }
+.meta-row .meta-v { font-family: var(--font-mono); font-size: 12px; word-break: break-all; }