added token storage in a store, and improved layout on mobile

src/base.css

@@ -1,4 +1,3 @@
-/* ---- CSS reset (minimal, modern) ---- */
 *,
 *::before,
 *::after {
@@ -16,19 +15,17 @@ body,
   height: 100%;
 }
 
-/* ---- Theme variables ---- */
 :root {
-  --bg: #0f1115;
-  --panel: #171923;
+  --bg: #0f1116;
+  --panel: #171922;
   --text: #e6e6eb;
-  --muted: #9aa0a6;
-  --accent: #f27aa2;
-  --accent-hover: #ff91b4;
-  --border: #2a2f3a;
+  --muted: #9aa0aa;
+  --accent: #f27aa3;
+  --accent-hover: #ff91b3;
+  --border: #2a2f3b;
   --radius: 8px;
 }
 
-/* ---- Base ---- */
 body {
   font-family: system-ui, -apple-system, BlinkMacSystemFont,
     "Segoe UI", sans-serif;
@@ -37,7 +34,6 @@ body {
   line-height: 1.5;
 }
 
-/* ---- Inputs & buttons ---- */
 input, textarea {
   background: var(--panel);
   border: 1px solid var(--border);