Frontend Features and refactor

styles/collapsible.css

@@ -1,54 +1,64 @@
-/* Modern Collapsible Styling */
+/* Collapsible Styling (dictionary definitions on /find) */
 
 .collapsible {
-  background-color: #2f2f2f;
-  color: #e8e8e8;
+  background-color: var(--color-bg-tertiary);
+  color: var(--color-text-primary);
   cursor: pointer;
-  padding: 1rem 1.25rem;
+  padding: 0.85rem 1.1rem;
+  min-height: 44px;
   width: 100%;
-  max-width: 820px;
-  border: 2px solid #3a3a3a;
-  border-radius: 4px;
+  max-width: var(--content-max-width);
+  border: 2px solid var(--color-border);
+  border-radius: var(--border-radius-sm);
   text-align: left;
   outline: none;
   font-size: 1rem;
   font-weight: 600;
-  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
-  transition: background-color 150ms ease, border-color 150ms ease, transform 150ms ease;
-  margin: 0.5rem auto;
+  font-family: var(--font-ui);
+  transition: background-color 150ms ease, border-color 150ms ease;
+  margin: 0.5rem auto 0;
   display: block;
 }
 
+.collapsible::after {
+  content: "+";
+  float: right;
+  font-weight: 700;
+}
+
+.collapsible.active::after {
+  content: "\2212";
+}
+
 .collapsible:hover {
-  background-color: #3a3a3a;
-  border-color: #6b9bd1;
-  transform: translateY(-1px);
+  border-color: var(--color-accent-primary);
+  transform: none;
+}
+
+.collapsible:focus-visible {
+  border-color: var(--color-accent-primary);
+  box-shadow: 0 0 0 3px rgba(107, 155, 209, 0.3);
 }
 
 .collapsible.active {
-  background-color: #6b9bd1;
-  color: #1a1a1a;
-  border-color: #6b9bd1;
+  background-color: var(--color-accent-primary);
+  color: var(--color-on-accent);
+  border-color: var(--color-accent-primary);
 }
 
 .collapsible.active:hover {
-  background-color: #85aede;
-  border-color: #85aede;
+  background-color: var(--color-accent-hover);
+  border-color: var(--color-accent-hover);
 }
 
 /* Collapsible content styling */
 .content {
-  padding: 0 1.25rem;
   display: none;
   overflow: hidden;
-  background-color: #252525;
-  max-width: 820px;
+  background-color: var(--color-bg-secondary);
+  max-width: var(--content-max-width);
   margin: 0 auto 0.5rem;
-  border-radius: 4px;
-  border: 1px solid #3a3a3a;
-}
-
-.content.show {
-  display: block;
   padding: 1rem 1.25rem;
+  border-radius: var(--border-radius-sm);
+  border: 1px solid var(--color-border);
 }