Initial frontend import

src/index.css

@@ -0,0 +1,43 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+html,
+body,
+#root {
+  height: 100%;
+}
+
+body {
+  @apply bg-ark-bg text-neutral-100 antialiased;
+}
+
+/* Match theme: avoid default blue accent on controls */
+:root {
+  accent-color: #eeb726;
+}
+
+header a,
+header button {
+  -webkit-tap-highlight-color: transparent;
+}
+
+/* Desktop header nav: thin scrollbar when links overflow (still 單列) */
+.header-nav-scroll {
+  scrollbar-width: thin;
+  scrollbar-color: rgba(238, 183, 38, 0.45) transparent;
+}
+.header-nav-scroll::-webkit-scrollbar {
+  height: 4px;
+}
+.header-nav-scroll::-webkit-scrollbar-thumb {
+  background-color: rgba(238, 183, 38, 0.45);
+  border-radius: 9999px;
+}
+.header-nav-scroll::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+.gold-underline {
+  box-shadow: inset 0 -2px 0 #eeb726;
+}