First commit

frontend/app/assets/css/_articles.scss

@@ -0,0 +1,67 @@
+@use 'mixins' as *;
+
+// ---------- Articles index ----------
+.topic-tally { font-size: 0.85rem; color: var(--muted); }
+
+.topic-dropdown {
+  @include dropdown-panel;
+  left: 0;
+  right: 0;
+  max-height: 280px;
+}
+
+.topic-option {
+  @include menu-row(8px 12px, 12px, 0.88rem);
+  justify-content: space-between;
+  text-align: left;
+
+  &:hover, &.active { background: color-mix(in srgb, var(--accent) 12%, transparent); }
+}
+
+.topic-dropdown-none {
+  padding: 8px 12px;
+  margin: 0;
+  font-size: 0.85rem;
+  color: var(--muted);
+}
+
+.topic-search-wrap {
+  position: relative;
+  margin-bottom: 14px;
+
+  svg {
+    position: absolute;
+    left: 14px;
+    top: 50%;
+    translate: 0 -50%;
+    color: var(--faint);
+    pointer-events: none;
+  }
+}
+
+.topic-search {
+  width: 100%;
+  height: 40px;
+  padding: 0 14px 0 40px;
+  border-radius: 12px;
+  border: 1px solid var(--border);
+  background: var(--surface);
+  box-shadow: var(--shadow-sm);
+  font-size: 0.9rem;
+  transition: border-color 0.15s, box-shadow 0.2s;
+
+  &:focus {
+    outline: none;
+    border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
+    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
+  }
+}
+
+.topic-count {
+  padding: 1px 7px;
+  border-radius: 999px;
+  background: color-mix(in srgb, var(--accent) 14%, transparent);
+  color: var(--accent);
+  font-size: 0.72rem;
+  font-weight: 700;
+}