diff --git a/public/styles.css b/public/styles.css
index f330864..82e4740 100755
--- a/public/styles.css
+++ b/public/styles.css
@@ -1,4 +1,63 @@
-/* --- Sidebar and Overlay fix --- */
+/* ============================================================
+   THE FOLD WITHIN — Self-Organizing Static Site Framework v2.3.1
+   ============================================================ */
+
+/* === 1. Base Palette and Typography ======================== */
+:root {
+  --bg: #0b0c10;
+  --fg: #f3f3f3;
+  --accent: #d0aa5b;
+  --muted: #8d8f95;
+  --line: #2a2d34;
+}
+
+html, body {
+  margin: 0;
+  padding: 0;
+  background: var(--bg);
+  color: var(--fg);
+  font-family: system-ui, sans-serif;
+  -webkit-font-smoothing: antialiased;
+  text-rendering: optimizeLegibility;
+  scroll-behavior: smooth;
+}
+
+/* === 2. Topbar ============================================= */
+.topbar {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  height: 48px;
+  display: flex;
+  align-items: center;
+  gap: 1em;
+  background: #111;
+  padding: 0 1em;
+  z-index: 300;
+  box-shadow: 0 2px 8px rgba(0,0,0,.3);
+}
+
+.topbar a {
+  color: var(--accent);
+  text-decoration: none;
+  font-weight: 500;
+}
+
+.topbar a:hover { color: var(--fg); }
+
+.topbar button {
+  font-size: 24px;
+  background: transparent;
+  color: var(--accent);
+  border: none;
+  padding: 4px 8px;
+  cursor: pointer;
+  transition: color 0.2s ease;
+}
+.topbar button:hover { color: var(--fg); }
+
+/* === 3. Sidebar / Overlay Layout =========================== */
 .sidebar {
   position: fixed;
   top: 48px;
@@ -13,32 +72,37 @@
   padding: 10px;
   z-index: 200;          /* ABOVE overlay */
   will-change: transform;
+  border-right: 1px solid var(--line);
 }
+
 .sidebar.open { transform: translateX(0); }
 
+/* Dimmed blur behind sidebar */
 .overlay {
   position: fixed;
   inset: 0;
   background: rgba(0,0,0,.45);
   backdrop-filter: blur(4px);
   -webkit-backdrop-filter: blur(4px);
-  z-index: 150;           /* BELOW sidebar */
+  z-index: 150;          /* BELOW sidebar */
   opacity: 0;
   pointer-events: none;
-  transition: opacity .3s;
+  transition: opacity .3s ease;
 }
 .sidebar.open ~ .overlay {
   opacity: 1;
   pointer-events: all;
 }
 
+/* === 4. Content Region ===================================== */
 .content {
   margin-top: 48px;
   padding: 16px;
   transition: margin-left .3s ease;
+  max-width: 960px;
 }
 
-/* Desktop layout */
+/* Desktop two-column mode */
 @media (min-width: 900px) {
   .sidebar {
     transform: none !important;
@@ -53,9 +117,140 @@
   .overlay { display: none !important; }
 }
 
-/* Mobile layout */
+/* Mobile single-column mode */
 @media (max-width: 899px) {
-  .content {
-    margin-left: 0 !important;
-  }
+  .content { margin-left: 0 !important; }
+  .viewer { padding: 12px; font-size: 1.05em; line-height: 1.6; }
+  #htmlView, #mdView { min-height: calc(100vh - 60px); }
+}
+
+/* === 5. Viewer ============================================= */
+.viewer {
+  height: calc(100vh - 80px);
+  overflow: auto;
+  max-width: 820px;
+  margin: 0 auto;
+  padding-bottom: 40px;
+}
+
+#htmlView {
+  width: 100%;
+  height: 100%;
+  border: none;
+  background: #0b0c10;
+}
+
+/* Markdown formatting */
+#mdView h1, #mdView h2, #mdView h3 { color: var(--accent); }
+#mdView pre, #mdView code {
+  overflow-x: auto;
+  word-break: break-word;
+  background: #111;
+  padding: 0.5em;
+  border-radius: 4px;
+  color: var(--accent);
+}
+#mdView blockquote {
+  border-left: 3px solid var(--accent);
+  padding-left: 12px;
+  color: var(--muted);
+  font-style: italic;
+}
+#mdView a { color: var(--accent); }
+
+/* === 6. Meta / Pager ======================================= */
+.meta {
+  color: var(--muted);
+  margin-bottom: 12px;
+  font-size: 0.9em;
+}
+
+button#prev, button#next {
+  background: transparent;
+  border: 1px solid var(--line);
+  color: var(--fg);
+  border-radius: 8px;
+  padding: 4px 10px;
+  font-size: 0.95em;
+  cursor: pointer;
+  transition: all 0.2s ease;
+}
+button#prev:hover, button#next:hover {
+  border-color: var(--accent);
+  color: var(--accent);
+}
+
+/* === 7. Controls =========================================== */
+.controls {
+  display: flex;
+  gap: 0.5em;
+  margin-bottom: 8px;
+}
+select, #search {
+  background: #0b0c10;
+  color: var(--fg);
+  border: 1px solid var(--line);
+  border-radius: 4px;
+  padding: 6px;
+  font-size: 0.9em;
+}
+#search { flex: 1; }
+
+/* === 8. Directory Tree ===================================== */
+.dir .label {
+  display: flex;
+  align-items: center;
+  cursor: pointer;
+  padding: 4px 6px;
+  color: var(--accent);
+  font-weight: 600;
+  user-select: none;
+}
+.dir .label::before {
+  content: "▶";
+  margin-right: 6px;
+  font-size: 0.8em;
+  color: var(--muted);
+  transition: transform .2s;
+}
+.dir.open .label::before {
+  content: "▼";
+}
+
+.children {
+  display: none;
+  margin-left: 1em;
+  border-left: 1px dashed var(--line);
+  padding-left: 10px;
+}
+.dir.open > .children { display: block; }
+
+.file {
+  display: block;
+  padding: 4px 12px;
+  color: var(--fg);
+  text-decoration: none;
+  border-radius: 4px;
+  font-size: 0.95em;
+  transition: background 0.15s ease;
+}
+.file:hover { background: rgba(208,170,91,.1); }
+.file.active {
+  background: rgba(208,170,91,.2);
+  outline: 1px solid var(--line);
+}
+
+.pin { color: var(--accent); margin-right: 4px; }
+.meta { color: var(--muted); font-size: 0.85em; margin-left: 6px; }
+
+/* === 9. Scrollbars ========================================= */
+::-webkit-scrollbar { width: 8px; height: 8px; }
+::-webkit-scrollbar-thumb { background: var(--line); border-radius: 4px; }
+::-webkit-scrollbar-thumb:hover { background: var(--accent); }
+
+/* === 10. Animations & Effects ============================== */
+.fade-in { animation: fadeIn 0.25s ease-in; }
+@keyframes fadeIn {
+  from { opacity: 0; transform: translateY(6px); }
+  to { opacity: 1; transform: translateY(0); }
 }
\ No newline at end of file