diff --git a/css/style.css b/css/style.css
index 96d4400..b76621f 100644
--- a/css/style.css
+++ b/css/style.css
@@ -1,63 +1,367 @@
+:root {
+  /* Colors (from restyle design tokens) */
+  --primary: #006b58;
+  --primary-container: #1abc9c;
+  --on-primary: #ffffff;
+  --on-primary-container: #004538;
+  --secondary: #4e6073;
+  --on-secondary: #ffffff;
+  --on-secondary-container: #526478;
+  --background: #f7f9fb;
+  --surface: #f7f9fb;
+  --surface-container-lowest: #ffffff;
+  --surface-container-low: #f2f4f6;
+  --surface-container: #eceef0;
+  --surface-container-high: #e6e8ea;
+  --surface-container-highest: #e0e3e5;
+  --on-surface: #191c1e;
+  --on-surface-variant: #3c4a45;
+  --on-background: #191c1e;
+  --text-muted: #64748b;
+  --border-subtle: #e2e8f0;
+  --outline: #6c7a75;
+  --outline-variant: #bbcac3;
+  --editor-bg: #1e1e1e;
+  --error: #ba1a1a;
+
+  /* Radii */
+  --radius: 0.125rem;
+  --radius-lg: 0.25rem;
+  --radius-xl: 0.5rem;
+  --radius-full: 0.75rem;
+
+  /* Fonts */
+  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
+  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
+}
+
 * {
   margin: 0;
   padding: 0;
+  box-sizing: border-box;
 }
 
-body{
-  font-family: arial;
+body {
+  font-family: var(--font-body);
+  font-size: 16px;
+  line-height: 24px;
+  color: var(--on-background);
+  background-color: var(--background);
+  min-height: 100vh;
+}
+
+/* ---- Top nav bar ---- */
+
+.topnav {
+  position: sticky;
+  top: 0;
+  z-index: 50;
+  background: var(--surface-container-lowest);
+  border-bottom: 1px solid var(--border-subtle);
+}
+
+.topnav-inner {
+  max-width: 1200px;
+  margin: auto;
+  height: 64px;
+  padding: 0 24px;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.topnav-left {
+  display: flex;
+  align-items: center;
+  gap: 32px;
+}
+
+.brand {
+  font-size: 20px;
+  font-weight: 700;
+  color: var(--primary);
+}
+
+.topnav-links {
+  display: flex;
+  gap: 24px;
+}
+
+.topnav-links a {
+  color: var(--secondary);
+  font-weight: 500;
+  font-size: 14px;
+}
+
+.topnav-links a:hover {
+  color: var(--primary);
+  text-decoration: none;
+}
+
+.topnav-right {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.icon-btn {
+  background: transparent;
+  color: var(--secondary);
+  border: none;
+  font-size: 18px;
+  line-height: 1;
+  padding: 6px;
+  margin: 0;
+  border-radius: var(--radius-lg);
+  cursor: pointer;
+}
+
+.icon-btn:hover {
+  color: var(--primary);
+  background: var(--surface-container);
+  opacity: 1;
+}
+
+.theme-icon-light {
+  display: none;
+}
+
+.btn-reset {
+  margin: 0;
+}
+
+/* ---- Layout: sidebar + main ---- */
+
+.layout {
+  display: flex;
+  gap: 32px;
+  max-width: 1200px;
+  margin: auto;
+  padding: 32px 24px 64px;
+  align-items: flex-start;
+}
+
+.sidebar {
+  position: sticky;
+  top: 96px;
+  flex: 0 0 220px;
+  width: 220px;
+  background: var(--surface-container-low);
+  border: 1px solid var(--border-subtle);
+  border-radius: var(--radius-xl);
+  padding: 24px 0;
+}
+
+.sidebar-nav {
+  display: flex;
+  flex-direction: column;
+}
+
+.sidebar-link {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 12px 24px;
+  font-family: var(--font-mono);
+  font-size: 13px;
+  font-weight: 500;
+  color: var(--secondary);
+  border-right: 3px solid transparent;
+}
+
+.sidebar-link:hover {
+  background: var(--surface-container-high);
+  text-decoration: none;
+}
+
+.sidebar-link.active {
+  color: var(--primary);
+  font-weight: 700;
+  background: rgba(26, 188, 156, 0.1);
+  border-right-color: var(--primary);
+}
+
+.sidebar-num {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 22px;
+  height: 22px;
+  border-radius: 4px;
+  background: var(--surface-container-high);
+  color: var(--secondary);
+  font-size: 12px;
+  font-weight: 700;
+  flex-shrink: 0;
+}
+
+.sidebar-link.active .sidebar-num {
+  background: var(--primary);
+  color: var(--on-primary);
 }
 
 .wrapper {
   display: flex;
   flex-direction: column;
-  margin: auto;
-  width: 900px;
+  gap: 24px;
+  flex: 1;
+  min-width: 0;
 }
 
+/* ---- Step number rail ---- */
+
+.section.step {
+  position: relative;
+  padding-left: 72px;
+  scroll-margin-top: 88px;
+}
+
+.step-num {
+  position: absolute;
+  left: 16px;
+  top: 32px;
+  width: 40px;
+  height: 40px;
+  border-radius: 10px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-weight: 700;
+  background: var(--surface-container-high);
+  color: var(--secondary);
+  border: 1px solid var(--border-subtle);
+  z-index: 2;
+}
+
+.active .step-num {
+  background: var(--primary);
+  color: var(--on-primary);
+  border-color: var(--primary);
+}
+
+.step::before {
+  content: "";
+  position: absolute;
+  left: 35px;
+  top: 40px;
+  bottom: -24px;
+  width: 2px;
+  background: var(--border-subtle);
+  z-index: 1;
+}
+
+#step-4.step::before {
+  display: none;
+}
+
+/* ---- Typography ---- */
+
+h1 {
+  font-size: 30px;
+  line-height: 38px;
+  letter-spacing: -0.02em;
+  font-weight: 600;
+  color: var(--primary);
+  margin-bottom: 8px;
+}
+
+h2 {
+  font-size: 20px;
+  line-height: 28px;
+  font-weight: 600;
+  color: var(--on-surface);
+}
+
+.sub-section-title {
+  font-family: var(--font-mono);
+  font-size: 13px;
+  line-height: 16px;
+  font-weight: 500;
+  color: var(--primary);
+  margin: 0 0 12px;
+}
+
+p {
+  margin: 16px 0;
+  color: var(--on-surface-variant);
+}
+
+a {
+  color: var(--primary);
+  text-decoration: none;
+  font-weight: 500;
+}
+
+a:hover {
+  text-decoration: underline;
+}
+
+code {
+  font-family: var(--font-mono);
+  font-size: 0.9em;
+  background: var(--surface-container);
+  padding: 1px 5px;
+  border-radius: var(--radius-lg);
+}
+
+/* ---- Section cards ---- */
+
 .section {
-  margin: 10px 0;
+  background: var(--surface-container-lowest);
+  border: 1px solid var(--border-subtle);
+  border-radius: var(--radius-xl);
+  padding: 32px;
 }
 
+/* First (intro) section: keep it flush/light */
+.section:first-child {
+  background: transparent;
+  border: none;
+  padding: 8px 0 0;
+}
+
+.section h2 {
+  margin-bottom: 16px;
+}
+
+/* Legacy divider no longer needed; cards separate content */
 .bottom-divider {
-  border-bottom: 2px solid #000000;
-  padding-bottom: 20px;
+  border-bottom: none;
+  padding-bottom: 32px;
 }
 
 .sub-section {
   clear: both;
-  margin-bottom: 1px;
-}
-
-.section,
-.sub-section {
   width: 100%;
 }
 
+.section {
+  width: 100%;
+}
+
+/* ---- Multi-column (select image row) ---- */
+
 .column {
   float: left;
 }
 
 .column-center {
-  min-width: 160px;
+  min-width: 120px;
   text-align: center;
+  color: var(--text-muted);
 }
 
 .column-right {
   float: right;
 }
 
-.sub-section-title {
-  margin: 0 0 10px;
-}
-
-p {
-  margin: 20px 0;
-}
+/* ---- Table layout for settings ---- */
 
 .table {
   display: table;
-  margin: 10px 0 0;
+  margin: 8px 0 0;
   width: 100%;
+  border-collapse: collapse;
 }
 
 .table-row {
@@ -67,11 +371,13 @@ p {
 
 .table-cell {
   display: table-cell;
-  padding: 5px 0;
+  padding: 10px 0;
+  vertical-align: top;
 }
 
 .table-cell:first-child {
   width: 30%;
+  padding-right: 16px;
 }
 
 .table-cell:last-child {
@@ -79,11 +385,16 @@ p {
 }
 
 .table-cell:first-child label {
-  font-weight: bold;
+  font-family: var(--font-mono);
+  font-size: 13px;
+  font-weight: 500;
+  color: var(--primary);
 }
 
 .table-cell:last-child label {
   margin-right: 10px;
+  color: var(--on-surface-variant);
+  font-size: 14px;
 }
 
 .nested-table {
@@ -91,83 +402,99 @@ p {
 }
 
 .nested-table .table-cell {
-  color: #666;
-  font-size: .9em;
+  color: var(--text-muted);
+  font-size: 0.9em;
   width: 200px;
 }
 
 #format-caption-container div {
-  color: #505050;
+  color: var(--text-muted);
   display: none;
-  font-size: .9em;
-  line-height: 1.4em;
+  font-size: 14px;
+  line-height: 1.5em;
   padding: 10px 0 15px;
   width: 100%;
 }
 
+/* ---- Notes / messages ---- */
+
+.note {
+  color: var(--text-muted);
+  font-size: 14px;
+  line-height: 1.5em;
+  margin: 4px 0;
+}
+
 .upload-note {
-  max-width: 300px;
+  max-width: 320px;
+}
+
+.msg {
+  font-size: 16px;
+  color: var(--text-muted);
+}
+
+.error-msg {
+  color: var(--error);
+  display: none;
+}
+
+/* ---- Form controls ---- */
+
+input[type="text"],
+input[type="number"],
+textarea,
+select {
+  font-family: var(--font-body);
+  font-size: 14px;
+  color: var(--on-surface-variant);
+  background: var(--surface-container);
+  border: 1px solid transparent;
+  border-radius: var(--radius-lg);
+  padding: 8px 10px;
+  transition: border-color 0.15s ease, box-shadow 0.15s ease;
+}
+
+input[type="text"]:focus,
+input[type="number"]:focus,
+textarea:focus,
+select:focus {
+  outline: none;
+  border-color: var(--primary);
+  box-shadow: 0 0 0 2px rgba(0, 107, 88, 0.25);
+}
+
+select {
+  cursor: pointer;
+}
+
+input[type="checkbox"],
+input[type="radio"] {
+  accent-color: var(--primary);
+  width: 16px;
+  height: 16px;
+  vertical-align: middle;
+  cursor: pointer;
 }
 
 .byte-input {
   min-height: 160px;
   min-width: 360px;
-}
-
-.code-output {
-  height: 200px;
   width: 100%;
+  font-family: var(--font-mono);
+  font-size: 14px;
+  line-height: 22px;
+  resize: vertical;
 }
 
-.note {
-  color: #666666;
-  font-size: .9em;
-  line-height: 1.4em;
-  margin: 3px 0;
+.text-input-size {
+  margin: 8px 0;
+  color: var(--on-surface-variant);
+  font-size: 14px;
 }
 
-.file-input-entry {
-  display: flex;
-  justify-content: space-between;
-  margin-bottom: 10px;
-}
-
-button,
-input[type="file"] {
-  background: #00CB99;
-  border-radius: 3px;
-  border: none;
-  color: #fff;
-  font-size: .9em;
-  font-weight: bold;
-  margin: 10px 0 0 0;
-  padding: 4px 8px;
-}
-
-input[type="file"] {
-  font-size: 1.0em;
-  padding: 6px 20px;
-}
-
-.generate-button {
-  margin: 40px 0 20px;
-}
-
-.remove-button {
-  margin: 0 0 0 10px;
-  padding: 1px 4px;
-}
-
-.file-info {
-  color: #505050;
-  font-size: .7em;
-  margin-left: 20px;
-  max-width: 300px;
-  white-space: pre;
-}
-
-.size-input{
-  width: 45px;
+.size-input {
+  width: 72px;
 }
 
 .glyph-input {
@@ -175,18 +502,122 @@ input[type="file"] {
   margin-left: 10px;
 }
 
+.text-input {
+  font-family: var(--font-mono);
+}
+
+/* ---- Buttons ---- */
+
+button {
+  font-family: var(--font-mono);
+  font-size: 13px;
+  font-weight: 500;
+  background: var(--primary-container);
+  color: var(--on-primary-container);
+  border: none;
+  border-radius: var(--radius-lg);
+  padding: 8px 16px;
+  margin: 10px 8px 0 0;
+  cursor: pointer;
+  transition: opacity 0.15s ease, background-color 0.15s ease;
+}
+
+button:hover {
+  opacity: 0.9;
+}
+
+button:active {
+  opacity: 0.8;
+}
+
+input[type="file"] {
+  background: var(--surface-container);
+  color: var(--on-surface-variant);
+  border: 2px dashed var(--outline-variant);
+  border-radius: var(--radius-lg);
+  font-size: 14px;
+  padding: 16px 20px;
+  margin: 10px 0 0;
+  cursor: pointer;
+  width: 100%;
+  max-width: 360px;
+}
+
+input[type="file"]:hover {
+  background: var(--surface-container-high);
+}
+
+input[type="file"]::file-selector-button {
+  font-family: var(--font-mono);
+  font-weight: 500;
+  background: var(--primary-container);
+  color: var(--on-primary-container);
+  border: none;
+  border-radius: var(--radius-lg);
+  padding: 6px 12px;
+  margin-right: 12px;
+  cursor: pointer;
+}
+
+.generate-button {
+  background: var(--primary);
+  color: var(--on-primary);
+  margin: 32px 8px 20px 0;
+  padding: 10px 20px;
+}
+
+#copy-button,
+#download-button {
+  background: var(--secondary);
+  color: var(--on-secondary);
+  margin-top: 32px;
+}
+
+.remove-button {
+  margin: 0 0 0 10px;
+  padding: 2px 8px;
+  background: var(--surface-container-high);
+  color: var(--on-surface-variant);
+}
+
+/* ---- File info / size list ---- */
+
+.file-input-entry {
+  display: flex;
+  justify-content: space-between;
+  margin-bottom: 10px;
+}
+
+.file-info {
+  color: var(--text-muted);
+  font-size: 12px;
+  margin-left: 20px;
+  max-width: 320px;
+  white-space: pre;
+}
+
+.file-name {
+  display: block;
+  margin-left: 0;
+  margin-bottom: 8px;
+  font-weight: 500;
+  color: var(--on-surface-variant);
+}
+
+/* Tighten gap between a row and the explanatory note row that follows */
+.note-row .table-cell {
+  padding-top: 0;
+}
+
 #image-size-settings {
   list-style-type: none;
 }
 
 #image-size-settings li {
-  margin: 4px 0;
+  margin: 6px 0;
 }
 
-#images-canvas-container canvas {
-  border: 3px solid #88DAC5;
-  margin: 10px 15px;
-}
+/* ---- Preview canvases ---- */
 
 #images-canvas-container {
   align-items: flex-start;
@@ -194,33 +625,165 @@ input[type="file"] {
   flex-wrap: wrap;
 }
 
+#images-canvas-container canvas {
+  border: 1px solid var(--outline-variant);
+  border-radius: var(--radius-lg);
+  background: var(--editor-bg);
+  margin: 10px 15px 10px 0;
+  padding: 4px;
+}
+
+.inlineImg {
+  border-radius: var(--radius-lg);
+  margin-top: 8px;
+}
+
+/* ---- Code output (dark editor look) ---- */
+
+.code-output {
+  height: 400px;
+  width: 100%;
+  margin-top: 16px;
+  background: var(--editor-bg);
+  color: #dcdcaa;
+  border: 1px solid var(--on-surface-variant);
+  border-radius: var(--radius-xl);
+  font-family: var(--font-mono);
+  font-size: 14px;
+  line-height: 22px;
+  padding: 20px;
+  resize: vertical;
+}
+
+.code-output:focus {
+  outline: none;
+  border-color: var(--primary);
+  box-shadow: 0 0 0 2px rgba(0, 107, 88, 0.25);
+}
+
+/* ---- Hidden by default (toggled via JS) ---- */
+
 #arduino-identifier,
 #adafruit-gfx-settings,
 #all-same-size {
   display: none;
 }
 
-.msg {
-  font-size: 1.2em;
+/* ---- Sponsor block ---- */
+
+.sp-block {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 12px;
 }
 
-.error-msg {
-  color: #ff0000;
+.sp-block img {
+  vertical-align: middle;
+}
+
+/* ---- Responsive ---- */
+
+@media (max-width: 900px) {
+  .layout {
+    flex-direction: column;
+  }
+
+  .sidebar {
+    position: static;
+    width: 100%;
+    flex: none;
+  }
+
+  .sidebar-nav {
+    flex-direction: row;
+    flex-wrap: wrap;
+  }
+
+  .sidebar-link {
+    border-right: none;
+    border-radius: var(--radius-lg);
+  }
+
+  .sidebar-link.active {
+    border-right: none;
+  }
+}
+
+@media (max-width: 640px) {
+  .topnav-links {
+    display: none;
+  }
+
+  .section.step {
+    padding-left: 32px;
+  }
+
+  .step-num {
+    position: static;
+    margin-bottom: 16px;
+  }
+
+  .step::before {
+    display: none;
+  }
+
+  .column,
+  .column-right {
+    float: none;
+    width: 100%;
+  }
+
+  .byte-input {
+    min-width: 0;
+  }
+
+  .table-cell:first-child,
+  .table-cell:last-child {
+    display: block;
+    width: 100%;
+  }
+
+  .table-cell:first-child {
+    padding-bottom: 0;
+  }
+}
+
+/* ---- Dark theme ---- */
+
+:root[data-theme="dark"] {
+  --primary: #4eddbb;
+  --primary-container: #1abc9c;
+  --on-primary: #003a2e;
+  --on-primary-container: #e5fff7;
+  --secondary: #b5c8df;
+  --on-secondary: #17293b;
+  --on-secondary-container: #cfe2f9;
+  --background: #0f1416;
+  --surface: #0f1416;
+  --surface-container-lowest: #171d1f;
+  --surface-container-low: #1a2124;
+  --surface-container: #22282b;
+  --surface-container-high: #2a3033;
+  --surface-container-highest: #343a3d;
+  --on-surface: #e0e3e5;
+  --on-surface-variant: #c3d0c9;
+  --on-background: #e0e3e5;
+  --text-muted: #8a9a94;
+  --border-subtle: #2d3133;
+  --outline: #8a938f;
+  --outline-variant: #414a47;
+  --editor-bg: #0b0e0f;
+}
+
+:root[data-theme="dark"] .theme-icon-dark {
   display: none;
 }
 
-h1{
-  padding: 10px;
-  color: white;
-  background-color: #00cb99;
+:root[data-theme="dark"] .theme-icon-light {
+  display: inline;
 }
 
-/*.sp-block {
-  border: 1px solid rgb(65, 65, 65);
-  padding: .5rem;
-  border-radius: 1rem;
+:root[data-theme="dark"] .sidebar-link.active {
+  background: rgba(26, 188, 156, 0.18);
 }
-.sp-btn {
-  display: block;
-  margin-top: .5rem;
-}*/
diff --git a/index.html b/index.html
index 0f3bcaa..9d24cff 100644
--- a/index.html
+++ b/index.html
@@ -3,12 +3,43 @@
 <head>
   <meta charset="UTF-8">
   <title>image2cpp</title>
+  <link rel="preconnect" href="https://fonts.googleapis.com">
+  <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+  <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap" rel="stylesheet">
   <script src="./js/dithering.js" defer></script>
   <script src="./js/script.js" defer></script>
   <link rel="stylesheet" href="./css/style.css">
 </head>
 <body>
-  <div class="wrapper">
+  <header class="topnav">
+    <div class="topnav-inner">
+      <div class="topnav-left">
+        <span class="brand">image2cpp</span>
+        <nav class="topnav-links">
+          <a href="https://github.com/javl/image2cpp" target="_blank">GitHub Repository</a>
+        </nav>
+      </div>
+      <div class="topnav-right">
+        <button class="icon-btn" id="theme-toggle" title="Toggle dark mode" aria-label="Toggle dark mode">
+          <span class="theme-icon-dark">&#9789;</span>
+          <span class="theme-icon-light">&#9788;</span>
+        </button>
+        <button class="btn-reset" onclick="location.reload()">Reset page</button>
+      </div>
+    </div>
+  </header>
+
+  <div class="layout">
+    <aside class="sidebar">
+      <nav class="sidebar-nav">
+        <a href="#step-1" class="sidebar-link" data-step="step-1"><span class="sidebar-num">1</span>Select Image</a>
+        <a href="#step-2" class="sidebar-link" data-step="step-2"><span class="sidebar-num">2</span>Settings</a>
+        <a href="#step-3" class="sidebar-link" data-step="step-3"><span class="sidebar-num">3</span>Preview</a>
+        <a href="#step-4" class="sidebar-link" data-step="step-4"><span class="sidebar-num">4</span>Output</a>
+      </nav>
+    </aside>
+
+    <main class="wrapper">
     <section class="section">
       <h1>image2cpp</h1>
       <p><strong>image2cpp</strong> is a simple tool to change images into byte arrays (or arrays back into an images) for use with (monochrome) displays such as OLEDs on your Arduino or Raspberry Pi.<br>
@@ -17,20 +48,16 @@
       <p>More info (and credits) can be found in the <a href="https://github.com/javl/image2cpp" target="_blank">Github repository</a>. This is also where you can report any <a href="https://github.com/javl/image2cpp/issues" target="_blank">issues</a> you might come across.</p>
       <p class="sp-block">
         Did you find this tool useful? Feel free to support my open source software on Github, especially if used commercially.<br />
-        <a href="https://github.com/sponsors/javl" target="_blank">
-          <img src="https://img.shields.io/github/sponsors/javl?label=Sponsor&logo=GitHub" alt="GitHub Sponsor">
-        </a>
-        <a href="https://www.buymeacoffee.com/javl" target="_blank" rel="noopener">
-          <img decoding="async" class="" style="height: 34px; width: 123px;" src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee">
-        </a>
-
+        <a href="https://github.com/sponsors/javl"><img src="https://camo.githubusercontent.com/7fcc34127227d7a0293435c20a74bce4bf3eb26d86f6c5000aa620da147223dd/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f5f2d73706f6e736f725f6f6e5f4769746875622d626c75653f6c6f676f3d676974687562" alt="GitHub Sponsor" data-canonical-src="https://img.shields.io/badge/_-sponsor_on_Github-blue?logo=github" style="max-width: 100%;"></a>
+        <a href="https://www.buymeacoffee.com/javl" rel="nofollow"><img src="https://camo.githubusercontent.com/0eeabd01753f37f754419d1b3f1b9fd755b1653c23283c8c8b17b1fbb18191e4/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f4275795f4d655f615f436f666665652d6f72616e67653f6c6f676f3d6275796d6561636f66666565" alt="BMC" data-canonical-src="https://img.shields.io/badge/Buy_Me_a_Coffee-orange?logo=buymeacoffee" style="max-width: 100%;"></a>
       </p>
     </section>
 
-    <section class="section bottom-divider">
+    <section class="section step bottom-divider" id="step-1">
+      <div class="step-num">1</div>
       <section class="sub-section">
         <div class="column" id="file-input-column">
-          <h2 class="sub-section-title">1. Select image</h2>
+          <h2 class="sub-section-title">Select image</h2>
           <div class="note upload-note">All processing is done locally in your browser; your images are not uploaded or stored anywhere online.</div>
           <input type="file" id="file-input" name="file-input" multiple/><br />
         </div>
@@ -38,7 +65,7 @@
           <h2 class="sub-section-title">or</h2>
         </div>
         <div class="column column-right">
-          <h2 class="sub-section-title">1. Paste byte array</h2>
+          <h2 class="sub-section-title">Paste byte array</h2>
           <textarea id="byte-input" class="byte-input"></textarea><br />
           <div class="text-input-size">
             <input type="number" min="0" id="text-input-width" class="size-input" value="128" /> x
@@ -53,8 +80,9 @@
       </section>
     </section>
 
-    <section class="section bottom-divider">
-      <h2>2. Image Settings</h2>
+    <section class="section step bottom-divider" id="step-2">
+      <div class="step-num">2</div>
+      <h2>Image Settings</h2>
       <section class="sub-section">
         <div class="table">
 
@@ -131,7 +159,7 @@
             </div>
           </div>
 
-          <div class="table-row">
+          <div class="table-row note-row">
             <div class="table-cell"></div>
             <div class="table-cell">
               <i class="note">Centering the image only works when using a canvas larger than the original image.</i>
@@ -165,16 +193,18 @@
       </section>
     </section>
 
-    <section class="section bottom-divider">
-      <h2>3. Preview</h2>
+    <section class="section step bottom-divider" id="step-3">
+      <div class="step-num">3</div>
+      <h2>Preview</h2>
       <section class="sub-section">
         <div class="no-file-selected" class="msg">No files selected</div>
         <div id="images-canvas-container"></div>
       </section>
     </section>
 
-    <section class="section">
-      <h2>4. Output</h2>
+    <section class="section step" id="step-4">
+      <div class="step-num">4</div>
+      <h2>Output</h2>
       <section class="sub-section">
         <div class="table">
           <div class="table-row">
@@ -286,7 +316,35 @@
         <textarea id="code-output" class="code-output"></textarea>
       </section>
     </section>
+    </main>
   </div>
 
+  <script>
+    // Dark mode toggle (persisted)
+    (function () {
+      var root = document.documentElement;
+      var stored = localStorage.getItem('theme');
+      if (stored) root.setAttribute('data-theme', stored);
+      var btn = document.getElementById('theme-toggle');
+      if (btn) btn.addEventListener('click', function () {
+        var next = root.getAttribute('data-theme') === 'dark' ? 'light' : 'dark';
+        root.setAttribute('data-theme', next);
+        localStorage.setItem('theme', next);
+      });
+
+      // Sidebar scrollspy
+      var links = Array.prototype.slice.call(document.querySelectorAll('.sidebar-link'));
+      var steps = links.map(function (l) { return document.getElementById(l.dataset.step); });
+      function onScroll() {
+        var pos = window.scrollY + 120;
+        var active = 0;
+        steps.forEach(function (s, i) { if (s && s.offsetTop <= pos) active = i; });
+        links.forEach(function (l, i) { l.classList.toggle('active', i === active); });
+        steps.forEach(function (s, i) { if (s) s.classList.toggle('active', i === active); });
+      }
+      window.addEventListener('scroll', onScroll, { passive: true });
+      onScroll();
+    })();
+  </script>
 </body>
 </html>
diff --git a/js/script.js b/js/script.js
index bef3c87..18f75be 100644
--- a/js/script.js
+++ b/js/script.js
@@ -808,9 +808,8 @@ function handleImageSelection(evt) {
         };
 
         const fn = document.createElement('span');
-        fn.className = 'file-info';
+        fn.className = 'file-info file-name';
         fn.innerHTML = `${file.name} (file resolution: ${img.width} x ${img.height})`;
-        fn.innerHTML += '<br />';
 
         const rb = document.createElement('button');
         rb.className = 'remove-button';
diff --git a/restyle.md b/restyle.md
new file mode 100644
index 0000000..607bb59
--- /dev/null
+++ b/restyle.md
@@ -0,0 +1,404 @@
+<!DOCTYPE html><html class="light" lang="en" style=""><head>
+<meta charset="utf-8">
+<meta content="width=device-width, initial-scale=1.0" name="viewport">
+<title>image2cpp | Image to Byte Array Converter</title>
+<script src="https://cdn.tailwindcss.com?plugins=forms,container-queries"></script>
+<link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&amp;family=JetBrains+Mono:wght@400;500&amp;display=swap" rel="stylesheet">
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet">
+<link href="https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&amp;display=swap" rel="stylesheet">
+<script id="tailwind-config">
+      tailwind.config = {
+        darkMode: "class",
+        theme: {
+          extend: {
+            "colors": {
+                    "on-primary-container": "#004538",
+                    "on-tertiary": "#ffffff",
+                    "surface-variant": "#e0e3e5",
+                    "on-primary-fixed": "#002019",
+                    "on-secondary-fixed": "#091d2e",
+                    "border-subtle": "#E2E8F0",
+                    "outline": "#6c7a75",
+                    "inverse-surface": "#2d3133",
+                    "tertiary-container": "#fa866f",
+                    "tertiary-fixed-dim": "#ffb4a5",
+                    "success-teal": "#1ABC9C",
+                    "secondary-fixed-dim": "#b5c8df",
+                    "inverse-on-surface": "#eff1f3",
+                    "on-secondary-container": "#526478",
+                    "surface-container-low": "#f2f4f6",
+                    "on-tertiary-fixed-variant": "#7f2a1a",
+                    "on-primary": "#ffffff",
+                    "editor-bg": "#1E1E1E",
+                    "secondary": "#4e6073",
+                    "surface-tint": "#006b58",
+                    "primary-container": "#1abc9c",
+                    "on-secondary": "#ffffff",
+                    "tertiary": "#9f402e",
+                    "on-surface": "#191c1e",
+                    "on-primary-fixed-variant": "#005141",
+                    "text-muted": "#64748B",
+                    "tertiary-fixed": "#ffdad3",
+                    "surface-bright": "#f7f9fb",
+                    "on-tertiary-fixed": "#3f0400",
+                    "error": "#ba1a1a",
+                    "on-surface-variant": "#3c4a45",
+                    "inverse-primary": "#4eddbb",
+                    "primary": "#006b58",
+                    "surface-container": "#eceef0",
+                    "surface-container-high": "#e6e8ea",
+                    "error-container": "#ffdad6",
+                    "on-error": "#ffffff",
+                    "primary-fixed-dim": "#4eddbb",
+                    "surface-container-lowest": "#ffffff",
+                    "secondary-container": "#cfe2f9",
+                    "surface-dim": "#d8dadc",
+                    "on-secondary-fixed-variant": "#36485b",
+                    "background": "#f7f9fb",
+                    "surface": "#f7f9fb",
+                    "on-tertiary-container": "#711f10",
+                    "outline-variant": "#bbcac3",
+                    "on-background": "#191c1e",
+                    "surface-container-highest": "#e0e3e5",
+                    "secondary-fixed": "#d1e4fb",
+                    "on-error-container": "#93000a",
+                    "primary-fixed": "#6ff9d6"
+            },
+            "borderRadius": {
+                    "DEFAULT": "0.125rem",
+                    "lg": "0.25rem",
+                    "xl": "0.5rem",
+                    "full": "0.75rem"
+            },
+            "spacing": {
+                    "step-gap": "48px",
+                    "container-max": "1200px",
+                    "margin-desktop": "40px",
+                    "margin-mobile": "16px",
+                    "gutter": "24px"
+            },
+            "fontFamily": {
+                    "body-md": ["Inter"],
+                    "headline-lg-mobile": ["Inter"],
+                    "code-block": ["JetBrains Mono"],
+                    "body-sm": ["Inter"],
+                    "headline-lg": ["Inter"],
+                    "label-mono": ["JetBrains Mono"],
+                    "headline-md": ["Inter"]
+            },
+            "fontSize": {
+                    "body-md": ["16px", {"lineHeight": "24px", "fontWeight": "400"}],
+                    "headline-lg-mobile": ["24px", {"lineHeight": "32px", "fontWeight": "600"}],
+                    "code-block": ["14px", {"lineHeight": "22px", "fontWeight": "400"}],
+                    "body-sm": ["14px", {"lineHeight": "20px", "fontWeight": "400"}],
+                    "headline-lg": ["30px", {"lineHeight": "38px", "letterSpacing": "-0.02em", "fontWeight": "600"}],
+                    "label-mono": ["13px", {"lineHeight": "16px", "fontWeight": "500"}],
+                    "headline-md": ["20px", {"lineHeight": "28px", "fontWeight": "600"}]
+            }
+          },
+        },
+      }
+    </script>
+<style>
+        .material-symbols-outlined {
+            font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
+        }
+        .step-active { color: #006b58; }
+        .step-line { position: absolute; left: 19px; top: 40px; bottom: -20px; width: 2px; background-color: #E2E8F0; }
+        .last-step-line { display: none; }
+        .custom-scrollbar::-webkit-scrollbar { width: 8px; }
+        .custom-scrollbar::-webkit-scrollbar-track { background: #f1f1f1; }
+        .custom-scrollbar::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
+    </style>
+</head>
+<body class="bg-background text-on-background font-body-md min-h-screen">
+<!-- TopNavBar -->
+<header class="bg-surface dark:bg-background border-b border-border-subtle dark:border-outline-variant full-width top-0 sticky z-50">
+<div class="flex justify-between items-center h-16 px-margin-desktop max-w-container-max mx-auto">
+<div class="flex items-center gap-8">
+<span class="font-headline-md text-headline-md font-bold text-primary dark:text-primary-fixed-dim cursor-pointer">image2cpp</span>
+<nav class="hidden md:flex gap-6 font-body-md text-body-md"><a class="text-secondary dark:text-secondary-fixed-dim hover:text-primary transition-colors cursor-pointer" href="#">GitHub</a></nav>
+</div>
+<div class="flex items-center gap-4">
+<button class="material-symbols-outlined text-secondary hover:text-primary transition-colors cursor-pointer" data-icon="dark_mode">dark_mode</button>
+<button class="bg-primary-container text-on-primary-container px-4 py-2 font-label-mono text-label-mono rounded-lg hover:opacity-90 active:opacity-80 transition-all"><div class="">Reset page</div></button>
+</div>
+</div>
+</header>
+<div class="flex max-w-container-max mx-auto">
+<!-- SideNavBar -->
+<aside class="hidden lg:flex flex-col py-6 h-screen w-64 fixed left-0 top-16 bg-surface-container-low dark:bg-surface-container border-r border-border-subtle dark:border-outline-variant">
+<div class="px-6 mb-8">
+<h2 class="font-headline-md text-headline-md text-primary">Workflow</h2>
+<p class="font-body-sm text-body-sm text-text-muted">Conversion Steps</p>
+</div>
+<nav class="flex-1 space-y-1 font-label-mono text-label-mono">
+<div class="flex items-center gap-3 text-primary dark:text-primary-fixed-dim font-bold bg-primary-container/10 dark:bg-primary-container/20 border-r-4 border-primary dark:border-primary-fixed-dim py-3 px-6 cursor-pointer hover:bg-surface-container-high transition-all">
+<span class="material-symbols-outlined" data-icon="upload_file">upload_file</span>
+<span class="">1. Select Image</span>
+</div>
+<div class="flex items-center gap-3 text-secondary dark:text-secondary-fixed-dim py-3 px-6 cursor-pointer hover:bg-surface-container-high transition-all">
+<span class="material-symbols-outlined" data-icon="tune">tune</span>
+<span class="">2. Settings</span>
+</div>
+<div class="flex items-center gap-3 text-secondary dark:text-secondary-fixed-dim py-3 px-6 cursor-pointer hover:bg-surface-container-high transition-all">
+<span class="material-symbols-outlined" data-icon="visibility">visibility</span>
+<span class="">3. Preview</span>
+</div>
+<div class="flex items-center gap-3 text-secondary dark:text-secondary-fixed-dim py-3 px-6 cursor-pointer hover:bg-surface-container-high transition-all">
+<span class="material-symbols-outlined" data-icon="code">code</span>
+<span class="">4. Output</span>
+</div>
+</nav>
+<div class="p-6 mt-auto"><button class="w-full bg-secondary text-on-secondary py-2 rounded font-label-mono text-label-mono hover:bg-on-secondary-container transition-colors">Export All</button></div></aside>
+<!-- Main Content -->
+<main class="flex-1 lg:ml-64 px-margin-desktop py-12 max-w-4xl mx-auto">
+<div class="mb-12">
+<h1 class="font-headline-lg text-headline-lg mb-2">Image to C++ Converter</h1>
+<p class="text-text-muted">Generate monochrome byte arrays for OLED displays on Arduino or Raspberry Pi. All processing happens in your browser.</p>
+<div class="flex items-center gap-4 mt-4"><span class="text-text-muted font-body-sm">Support on</span><a class="w-10 h-10 rounded-full bg-surface-container-high flex items-center justify-center text-primary hover:bg-primary hover:text-on-primary transition-all" href="#"><span class="material-symbols-outlined" style="font-variation-settings: &quot;FILL&quot; 1;">favorite</span></a><a class="w-10 h-10 rounded-full bg-surface-container-high flex items-center justify-center text-primary hover:bg-primary hover:text-on-primary transition-all" href="#"><span class="material-symbols-outlined" style="font-variation-settings: &quot;FILL&quot; 1;">coffee</span></a></div></div>
+<!-- Workflow Steps -->
+<div class="space-y-step-gap">
+<!-- Step 1: Select Image -->
+<section class="relative pl-12" id="step-1">
+<div class="step-line"></div>
+<div class="absolute left-0 top-0 w-10 h-10 bg-primary rounded-full flex items-center justify-center text-on-primary font-bold shadow-sm z-10">1</div>
+<div class="bg-surface-container-lowest border border-border-subtle rounded-xl p-8 space-y-6">
+<div class="flex flex-col md:flex-row gap-6">
+<div class="flex-1">
+<label class="block font-label-mono text-label-mono text-primary mb-2">Upload Image File</label>
+<div class="border-2 border-dashed border-outline-variant rounded-lg p-10 flex flex-col items-center justify-center bg-surface-container hover:bg-surface-container-high transition-colors cursor-pointer group">
+<span class="material-symbols-outlined text-4xl text-outline mb-3 group-hover:scale-110 transition-transform" data-icon="cloud_upload">cloud_upload</span>
+<p class="font-body-md text-body-md text-on-surface-variant text-center">Drag and drop images here or <span class="text-primary font-bold">Browse</span></p>
+<p class="font-body-sm text-body-sm text-text-muted mt-2">Supports JPG, PNG, BMP, GIF</p>
+<input class="hidden" multiple="" type="file">
+</div>
+</div>
+<div class="flex-1">
+<label class="block font-label-mono text-label-mono text-primary mb-2">Or Paste Byte Array</label>
+<textarea class="w-full h-[180px] bg-surface-container text-on-surface-variant font-code-block text-code-block p-4 rounded-lg border-none focus:ring-2 focus:ring-primary focus:outline-none resize-none" placeholder="0xFF, 0x00, 0xAA..."></textarea>
+</div>
+</div>
+</div>
+</section>
+<!-- Step 2: Settings -->
+<section class="relative pl-12" id="step-2">
+<div class="step-line"></div>
+<div class="absolute left-0 top-0 w-10 h-10 bg-surface-container-high border border-border-subtle rounded-full flex items-center justify-center text-secondary font-bold z-10">2</div>
+<div class="bg-surface-container-lowest border border-border-subtle rounded-xl p-8 space-y-8">
+<div class="flex justify-between items-center mb-6"><h3 class="font-headline-md text-headline-md text-on-surface">Image Configuration</h3><div class="flex gap-2"><button class="p-1 text-secondary hover:text-primary transition-colors"></button></div></div>
+<div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-x-gutter gap-y-8">
+<!-- Canvas Size -->
+<div>
+<label class="block font-label-mono text-label-mono text-primary mb-3">Canvas Size (px)</label>
+<div class="flex items-center gap-2">
+<input class="w-full bg-surface-container border-none rounded p-2 font-label-mono" type="number" value="128">
+<span class="text-outline">×</span>
+<input class="w-full bg-surface-container border-none rounded p-2 font-label-mono" type="number" value="64">
+</div>
+</div>
+<!-- Background Color -->
+<div>
+<label class="block font-label-mono text-label-mono text-primary mb-3">Background Color</label>
+<div class="flex gap-1 bg-surface-container p-1 rounded-lg">
+<button class="flex-1 py-1.5 rounded text-label-mono bg-on-secondary-container text-white shadow-sm">White</button>
+<button class="flex-1 py-1.5 rounded text-label-mono text-secondary hover:bg-surface-container-high">Black</button>
+<button class="flex-1 py-1.5 rounded text-label-mono text-secondary hover:bg-surface-container-high">Transp.</button>
+</div>
+</div>
+<!-- Scaling -->
+<div>
+<label class="block font-label-mono text-label-mono text-primary mb-3">Scaling</label>
+<select class="w-full bg-surface-container border-none rounded p-2 font-body-sm focus:ring-primary">
+<option>Original Size</option>
+<option>Scale to Fit</option>
+<option>Stretch to Fill</option>
+<option>Stretch Horizontally</option>
+<option>Stretch Vertically</option>
+</select>
+</div>
+<!-- Dithering -->
+<div>
+<label class="block font-label-mono text-label-mono text-primary mb-3">Dithering Algorithm</label>
+<select class="w-full bg-surface-container border-none rounded p-2 font-body-sm focus:ring-primary">
+<option>Binary (Threshold)</option>
+<option>Bayer (Ordered)</option>
+<option>Floyd-Steinberg</option>
+<option>Atkinson</option>
+</select>
+</div>
+<!-- Brightness -->
+<div>
+<label class="block font-label-mono text-label-mono text-primary mb-3">Threshold (0-255)</label>
+<div class="flex items-center gap-4">
+<input class="flex-1 accent-primary" max="255" min="0" type="range" value="128">
+<span class="font-label-mono text-primary">128</span>
+</div>
+</div>
+<!-- Toggles -->
+<div class="">
+<label class="block font-label-mono text-label-mono text-primary mb-3">Image Adjustments</label>
+<div class="space-y-4">
+<label class="flex items-center gap-3 cursor-pointer">
+<div class="relative inline-flex items-center">
+<input class="sr-only peer" type="checkbox">
+<div class="w-11 h-6 bg-outline-variant peer-focus:outline-none rounded-full peer peer-checked:after:translate-x-full after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:border-gray-300 after:border after:rounded-full after:h-5 after:w-5 after:transition-all peer-checked:bg-primary"></div>
+</div>
+<span class="font-body-sm">Invert Colors</span>
+</label>
+<div class="flex gap-4">
+<button class="flex items-center gap-2 text-label-mono text-secondary hover:text-primary transition-colors">
+<span class="material-symbols-outlined text-sm">rotate_right</span> Rotate Image</button>
+<button class="flex items-center gap-2 text-label-mono text-secondary hover:text-primary transition-colors">
+<span class="material-symbols-outlined text-sm">flip</span> Flip Image</button>
+</div>
+</div>
+</div>
+</div>
+</div>
+</section>
+<!-- Step 3: Preview -->
+<section class="relative pl-12" id="step-3">
+<div class="step-line"></div>
+<div class="absolute left-0 top-0 w-10 h-10 bg-surface-container-high border border-border-subtle rounded-full flex items-center justify-center text-secondary font-bold z-10">3</div>
+<div class="bg-surface-container-lowest border border-border-subtle rounded-xl p-8">
+<div class="flex justify-between items-center mb-6">
+<h3 class="font-headline-md text-headline-md text-on-surface">Preview</h3>
+<div class="flex gap-2">
+<button class="p-1 text-secondary hover:text-primary transition-colors"></button>
+<button class="p-1 text-secondary hover:text-primary transition-colors"></button>
+</div>
+</div>
+<div class="grid grid-cols-1 md:grid-cols-2 gap-8">
+<div class="space-y-3">
+<span class="font-label-mono text-label-mono text-text-muted">Original</span>
+<div class="aspect-video bg-surface-container-high rounded-lg flex items-center justify-center border border-dashed border-outline-variant relative overflow-hidden">
+<img class="max-w-full max-h-full object-contain" data-alt="A clean, high-resolution original digital photo of a detailed robot head against a neutral gray background. The lighting is crisp and highlights the mechanical textures and metallic finishes. The composition is centered, creating a professional studio-quality look for image processing software. The aesthetic is tech-focused and minimal." src="https://lh3.googleusercontent.com/aida-public/AB6AXuAq1r2m_Da66R4eXvBlWq7d0AICWfEENZNfsexBvtCHmM5luhvCaPECRItz1w85o1XVfQtgy1XdkamKUDYAaRIQBJHQTB1Mt8pfbUMK7GNzDWYCQx6MUC1DEqnG0QSJBPc_zMJj6hZPoBKjAz_NUOg-mD4nC2cszzgH8dPaU_Z1B5fGEeHecdKtRIlPwCAjuArVWmSh1ayhApkbopqBSNOWmVjLk0RX5VkT_IwoHSYQFYFTtWJqAShF1g">
+</div>
+</div>
+<div class="space-y-3">
+<span class="font-label-mono text-label-mono text-text-muted">Converted (1-bit)</span>
+<div class="aspect-video bg-editor-bg rounded-lg flex items-center justify-center border border-on-surface-variant relative overflow-hidden">
+<!-- This would be the canvas rendering -->
+<img class="max-w-full max-h-full object-contain grayscale brightness-200 contrast-200" data-alt="A stylized 1-bit black and white monochrome rendering of the previous robot head image. The image is pixelated and high-contrast, mimicking an OLED display output with crisp white pixels on a deep black background. The conversion uses a dithered effect to represent shadows, creating a high-tech retro-digital aesthetic." src="https://lh3.googleusercontent.com/aida-public/AB6AXuBPXPnQHpXR6vyt7gdrlrgvIepXIaQ6-86RRIK88PdiKphM3fnxyX1eP2V4py6FTykrNAL4OpC8kmEFdzZhRfjPtMOmqisw66exgyOzOF6keumlvHUzPvVrBeWj7cr2gB88geHSizBpGdRxu8N30B0Kgl9VEdLwrE2juDzZM7169j4gPDbn6UcyKHHSjvMmkSGbynfboN3URFYfDA1CsyegObewcHcJ--8-gMSF1OzJ57FqHbvzpMjEtQ">
+</div>
+</div>
+</div>
+</div>
+</section>
+<!-- Step 4: Output -->
+<section class="relative pl-12" id="step-4">
+<div class="step-line last-step-line"></div>
+<div class="absolute left-0 top-0 w-10 h-10 bg-surface-container-high border border-border-subtle rounded-full flex items-center justify-center text-secondary font-bold z-10">4</div>
+<div class="bg-surface-container-lowest border border-border-subtle rounded-xl p-8 space-y-8">
+<div class="flex flex-col lg:flex-row justify-between items-start gap-8">
+<div class="w-full lg:w-1/3 space-y-6">
+<h3 class="font-headline-md text-headline-md text-on-surface">Output Settings</h3>
+<div class="space-y-4">
+<div>
+<label class="block font-label-mono text-label-mono text-primary mb-2">Output Format</label>
+<select class="w-full bg-surface-container border-none rounded p-2 font-body-sm focus:ring-primary">
+<option>Plain bytes</option>
+<option selected="">Arduino code</option>
+<option>Arduino code (Single Bitmap)</option>
+<option>Adafruit GFX Bitmap Font</option>
+</select>
+</div>
+<div>
+<label class="block font-label-mono text-label-mono text-primary mb-2">Identifier / Prefix</label>
+<input class="w-full bg-surface-container border-none rounded p-2 font-label-mono focus:ring-primary" type="text" value="myBitmap">
+</div>
+<div>
+<label class="block font-label-mono text-label-mono text-primary mb-2">Draw Mode</label>
+<select class="w-full bg-surface-container border-none rounded p-2 font-body-sm focus:ring-primary">
+<option>Horizontal - 1 bit per pixel</option>
+<option>Vertical - 1 bit per pixel</option>
+<option>Horizontal - 2 bytes per pixel (565)</option>
+</select>
+</div>
+<div class="pt-2 space-y-3">
+<label class="flex items-center gap-3 cursor-pointer">
+<input class="w-5 h-5 rounded border-outline-variant text-primary focus:ring-primary" type="checkbox">
+<span class="font-body-sm">Swap bits in byte</span>
+</label>
+<label class="flex items-center gap-3 cursor-pointer">
+<input class="w-5 h-5 rounded border-outline-variant text-primary focus:ring-primary" type="checkbox">
+<span class="font-body-sm">Remove '0x' and commas</span>
+</label>
+</div>
+</div>
+</div>
+<div class="w-full lg:w-2/3 space-y-4">
+<div class="flex justify-between items-end">
+
+<div class="flex gap-2">
+<button class="bg-primary text-on-primary px-4 py-2 rounded-lg font-label-mono text-label-mono hover:bg-on-primary-fixed-variant transition-all flex items-center gap-2">
+<span class="material-symbols-outlined text-sm" data-icon="play_arrow">play_arrow</span> Generate
+                                        </button>
+<button class="bg-surface-container-high text-on-surface-variant px-4 py-2 rounded-lg font-label-mono text-label-mono hover:bg-surface-container-highest transition-all flex items-center gap-2">
+<span class="material-symbols-outlined text-sm" data-icon="content_copy">content_copy</span> Copy
+                                        </button>
+<button class="bg-secondary text-on-secondary px-4 py-2 rounded-lg font-label-mono text-label-mono hover:opacity-90 transition-all flex items-center gap-2">
+<span class="material-symbols-outlined text-sm" data-icon="download">download</span> .bin
+                                        </button>
+</div>
+</div>
+<div class="bg-editor-bg rounded-xl p-6 font-code-block text-code-block text-white overflow-hidden border border-on-surface-variant h-[400px] flex flex-col">
+<div class="flex-1 overflow-auto custom-scrollbar">
+<pre class="text-green-400 opacity-60 italic mb-2">// Generated by image2cpp
+// 128x64px, myBitmap
+</pre>
+<code class="block text-[#dcdcaa]">const unsigned char myBitmap [] PROGMEM = {
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+};</code>
+</div>
+<div class="bg-surface-container-low p-4 rounded-lg flex items-start gap-3">
+<span class="material-symbols-outlined text-primary text-xl" data-icon="info">info</span>
+<p class="font-body-sm text-body-sm text-on-secondary-container leading-relaxed">If the preview looks scrambled on your hardware, try switching the <strong>Draw Mode</strong> between Horizontal and Vertical.
+                                    </p>
+</div>
+</div>
+</div>
+</div>
+</div></section>
+</div>
+</main>
+</div>
+<!-- Footer -->
+<script>
+        // Simple interactivity for demonstration
+        document.querySelectorAll('nav div, nav a').forEach(item => {
+            item.addEventListener('click', function() {
+                // Remove active classes from all
+                document.querySelectorAll('nav div').forEach(d => {
+                    d.classList.remove('text-primary', 'font-bold', 'bg-primary-container/10', 'border-r-4', 'border-primary');
+                    d.classList.add('text-secondary');
+                });
+                // Add to clicked
+                if (this.tagName === 'DIV') {
+                    this.classList.add('text-primary', 'font-bold', 'bg-primary-container/10', 'border-r-4', 'border-primary');
+                    this.classList.remove('text-secondary');
+                }
+            });
+        });
+
+        // Sticky side nav highlight on scroll logic could be added here
+    </script>
+
+
+</body></html>