diff --git a/index.html b/index.html
index 3ec9d9a..cb01e2d 100644
--- a/index.html
+++ b/index.html
@@ -1,341 +1,188 @@
-<!doctype html>
+<!DOCTYPE html>
 <html lang="en">
 <head>
-  <meta charset="utf-8">
-  <title>Stain vs Candara Preview</title>
-  <meta name="viewport" content="width=device-width,initial-scale=1">
+  <meta charset="UTF-8" />
+  <title>Stain Font Preview</title>
+  <meta name="viewport" content="width=device-width, initial-scale=1" />
   <style>
     :root {
-      --bg: #f7f8fb;
+      color-scheme: light;
+      --bg: #f7f7f8;
       --fg: #111827;
-      --accent: #2563eb;
-      --grid: #e5e7eb;
-      --border: #d1d5db;
-      --radius: 10px;
-      --font-ui: system-ui, -apple-system, BlinkMacSystemFont, -system-ui,
-                 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
+      --muted: #6b7280;
+      --accent: #111827;
+      --border: #e5e7eb;
+      --font-ui: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
     }
     * { box-sizing: border-box; }
     body {
       margin: 0;
-      padding: 24px;
+      padding: 1.5rem;
       font-family: var(--font-ui);
       background: var(--bg);
       color: var(--fg);
-      -webkit-font-smoothing: antialiased;
     }
     h1 {
-      margin: 0 0 8px;
+      margin: 0 0 1rem;
+      font-size: 1.8rem;
       font-weight: 600;
-      letter-spacing: 0.02em;
-    }
-    h2 {
-      margin: 24px 0 8px;
-      font-size: 16px;
-      font-weight: 600;
-      text-transform: uppercase;
-      letter-spacing: 0.16em;
-      color: #6b7280;
+      letter-spacing: 0.03em;
     }
     p {
-      margin: 4px 0 16px;
-      color: #4b5563;
-      max-width: 720px;
-      font-size: 14px;
-    }
-    .row {
-      display: flex;
-      flex-wrap: wrap;
-      gap: 16px;
-      margin-bottom: 16px;
-    }
-    .card {
-      flex: 1 1 260px;
-      background: #ffffff;
-      border-radius: var(--radius);
-      border: 1px solid var(--border);
-      padding: 14px 14px 12px;
-      box-shadow: 0 8px 18px rgba(15,23,42,0.04);
-      position: relative;
-      overflow: hidden;
-    }
-    .card-label {
-      font-size: 10px;
-      font-weight: 600;
-      text-transform: uppercase;
-      letter-spacing: 0.14em;
-      color: #9ca3af;
-      display: flex;
-      align-items: center;
-      gap: 6px;
-      margin-bottom: 4px;
-    }
-    .pill {
-      padding: 2px 8px 3px;
-      border-radius: 999px;
-      font-size: 9px;
-      font-weight: 600;
-      border: 1px solid #d1d5db;
-      color: #6b7280;
-      background: #f9fafb;
-    }
-    .sample {
-      font-size: 60px;
-      line-height: 1.1;
-      margin: 2px 0 6px;
-      display: flex;
-      flex-wrap: wrap;
-      gap: 10px 16px;
-    }
-    .sample span {
-      display: inline-block;
-    }
-    .caption {
-      font-size: 10px;
-      color: #9ca3af;
-      display: flex;
-      justify-content: space-between;
-      gap: 8px;
-      align-items: center;
-    }
-    .slider-wrap {
-      display: flex;
-      align-items: center;
-      gap: 8px;
-      font-size: 10px;
-      color: #6b7280;
-    }
-    input[type=range] {
-      -webkit-appearance: none;
-      appearance: none;
-      width: 120px;
-      height: 4px;
-      border-radius: 999px;
-      background: var(--grid);
-      outline: none;
-    }
-    input[type=range]::-webkit-slider-thumb {
-      -webkit-appearance: none;
-      appearance: none;
-      width: 13px;
-      height: 13px;
-      border-radius: 50%;
-      background: var(--accent);
-      cursor: pointer;
-      box-shadow: 0 1px 3px rgba(15,23,42,0.25);
-    }
-    input[type=range]::-moz-range-thumb {
-      width: 13px;
-      height: 13px;
-      border-radius: 50%;
-      background: var(--accent);
-      cursor: pointer;
-      box-shadow: 0 1px 3px rgba(15,23,42,0.25);
+      margin: 0 0 0.75rem;
+      color: var(--muted);
+      font-size: 0.95rem;
     }
     .grid {
-      position: absolute;
-      inset: 0;
-      background-image:
-        linear-gradient(to bottom, rgba(229,231,235,0.6) 1px, transparent 1px),
-        linear-gradient(to right, rgba(229,231,235,0.25) 1px, transparent 1px);
-      background-size: 22px 22px, 24px 24px;
-      opacity: 0.18;
-      pointer-events: none;
-      mix-blend-mode: multiply;
+      display: grid;
+      grid-template-columns: minmax(0, 1fr);
+      gap: 1.25rem;
+      margin-top: 1.5rem;
     }
-    .grid-labels {
-      position: absolute;
-      left: 6px;
-      top: 8px;
-      font-size: 7px;
-      color: rgba(148,163,253,0.7);
+    @media (min-width: 768px) {
+      .grid {
+        grid-template-columns: repeat(2, minmax(0, 1fr));
+      }
+    }
+    .panel {
+      padding: 1rem 1.1rem;
+      border-radius: 0.85rem;
+      border: 1px solid var(--border);
+      background: #ffffff;
+      box-shadow: 0 10px 25px rgba(15,23,42,0.03);
       display: flex;
       flex-direction: column;
-      gap: 4px;
-      pointer-events: none;
-      text-shadow: 0 1px 1px rgba(255,255,255,0.9);
+      gap: 0.5rem;
     }
-    .grid-labels span {
-      padding: 1px 4px;
-      border-radius: 999px;
-      background: rgba(255,255,255,0.9);
-      border: 1px solid rgba(199,210,254,0.8);
+    .label {
+      font-size: 0.8rem;
+      text-transform: uppercase;
+      letter-spacing: 0.16em;
+      color: var(--muted);
     }
-    .code {
-      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
-      font-size: 9px;
-      padding: 3px 6px;
-      border-radius: 6px;
-      background: #f9fafb;
-      border: 1px solid #e5e7eb;
-      color: #6b7280;
-    }
-    .flex-between {
+    .sample {
+      min-height: 80px;
+      font-size: 40px;
+      letter-spacing: 0.03em;
       display: flex;
-      justify-content: space-between;
       align-items: center;
-      gap: 8px;
+      flex-wrap: wrap;
+      gap: 0.4ch;
     }
-    .small-link {
-      font-size: 9px;
-      color: var(--accent);
-      text-decoration: none;
+    .controls {
+      display: flex;
+      flex-wrap: wrap;
+      gap: 0.5rem;
+      align-items: center;
+      margin-top: 1rem;
+      font-size: 0.8rem;
+      color: var(--muted);
     }
-    .small-link:hover {
-      text-decoration: underline;
+    .controls input[type="range"] {
+      flex: 1;
     }
-    @media (max-width: 640px) {
-      body {
-        padding: 16px;
-      }
-      .sample {
-        font-size: 42px;
-      }
+    .input-wrap {
+      margin-top: 0.5rem;
+      display: flex;
+      align-items: center;
+      gap: 0.4rem;
+      font-size: 0.8rem;
+      color: var(--muted);
+    }
+    .input-wrap input {
+      flex: 1;
+      padding: 0.35rem 0.5rem;
+      border-radius: 0.4rem;
+      border: 1px solid var(--border);
+      font-family: var(--font-ui);
+      font-size: 0.85rem;
+    }
+    .tag {
+      padding: 0.15rem 0.5rem;
+      border-radius: 999px;
+      border: 1px solid var(--border);
+      font-size: 0.7rem;
+      color: var(--muted);
     }
     @font-face {
       font-family: "Stain";
-      src: url("./dist/Stain-Regular.ttf") format("truetype");
+      src: url("./dist/Stain.otf") format("opentype");
       font-weight: 400;
       font-style: normal;
+      font-display: swap;
     }
-    .stain {
-      font-family: "Stain", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
-      font-feature-settings: "liga" 1, "kern" 1;
-    }
-    .candara {
-      font-family: Candara, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+    .stain { font-family: "Stain", system-ui, sans-serif; }
+    .sys {
+      font-family:
+        "Candara",
+        system-ui,
+        -apple-system,
+        BlinkMacSystemFont,
+        "Segoe UI",
+        sans-serif;
     }
   </style>
 </head>
 <body>
-  <header>
-    <h1>Stain Typeface Preview</h1>
-    <p>
-      Stain is a Candara-inspired humanist sans experiment.
-      This page compares Stain (left) with Candara (right) for A, B, C / a, b, c.
-      Make sure Candara is installed locally to see it accurately.
-    </p>
-  </header>
+  <h1>Stain Font Preview</h1>
+  <p>
+    Compare the in-progress "Stain" typeface against your system text (ideally Candara) in light mode.
+    Only A, B, C / a, b, c are currently implemented.
+  </p>
 
-  <h2>Core glyphs: A B C / a b c</h2>
-  <div class="row">
-    <section class="card">
-      <div class="grid" aria-hidden="true"></div>
-      <div class="grid-labels" aria-hidden="true">
-        <span>Ascender</span>
-        <span>x-height</span>
-        <span>Baseline</span>
-      </div>
-      <div class="card-label">
-        <span class="pill">Stain</span>
-        <span>Prototype outlines</span>
-      </div>
-      <div class="sample stain" id="stainSample">
-        <span>A</span><span>B</span><span>C</span>
-        <span>a</span><span>b</span><span>c</span>
-      </div>
-      <div class="caption">
-        <div class="slider-wrap">
-          Size
-          <input id="stainSize" type="range" min="28" max="96" value="60">
-        </div>
-        <code class="code">font-family: "Stain"</code>
-      </div>
-    </section>
-
-    <section class="card">
-      <div class="card-label">
-        <span class="pill">Candara</span>
-        <span>Reference glyphs</span>
-      </div>
-      <div class="sample candara" id="candaraSample">
-        <span>A</span><span>B</span><span>C</span>
-        <span>a</span><span>b</span><span>c</span>
-      </div>
-      <div class="caption flex-between">
-        <div class="slider-wrap">
-          Size
-          <input id="candaraSize" type="range" min="28" max="96" value="60">
-        </div>
-        <div>
-          <span class="code">font-family: Candara</span>
-        </div>
-      </div>
-    </section>
+  <div class="controls">
+    <span class="tag">A B C a b c</span>
+    <span>Size</span>
+    <input id="size" type="range" min="18" max="96" value="40" />
+    <span id="sizeVal">40px</span>
+    <span>Letter spacing</span>
+    <input id="track" type="range" min="-10" max="40" value="3" />
+    <span id="trackVal">0.03em</span>
   </div>
 
-  <h2>Side-by-side comparison</h2>
-  <div class="row">
-    <section class="card">
-      <div class="card-label">
-        <span class="pill">Pair</span>
-        Overlay scan-lines
-      </div>
-      <div class="sample">
-        <span class="stain" id="pairStain">ABC abc</span>
-        <span class="candara" id="pairCandara">ABC abc</span>
-      </div>
-      <div class="caption flex-between">
-        <div class="slider-wrap">
-          Shared size
-          <input id="pairSize" type="range" min="28" max="96" value="54">
-        </div>
-        <span class="code">Compare curves / modulation / width</span>
-      </div>
+  <div class="input-wrap">
+    <span>Sample text:</span>
+    <input id="text" value="ABC abc" />
+  </div>
+
+  <div class="grid">
+    <section class="panel">
+      <div class="label">Stain</div>
+      <div id="stainSample" class="sample stain">ABC abc</div>
     </section>
 
-    <section class="card">
-      <div class="card-label">
-        <span class="pill">Playground</span>
-        Custom text
-      </div>
-      <div class="sample" style="flex-direction: column; gap: 6px;">
-        <div class="stain" id="playStain">Stain ABC abc</div>
-        <div class="candara" id="playCandara">Stain ABC abc</div>
-      </div>
-      <div class="caption flex-between">
-        <input
-          id="playInput"
-          type="text"
-          value="Stain ABC abc"
-          style="flex:1;border:1px solid var(--border);border-radius:7px;padding:4px 6px;font-size:10px;font-family:var(--font-ui);color:#374151;background:#f9fafb;"
-        >
-        <a class="small-link" href="./dist/Stain-Regular.ttf" download>Download Stain-Regular.ttf</a>
-      </div>
+    <section class="panel">
+      <div class="label">System (Candara / fallback)</div>
+      <div id="sysSample" class="sample sys">ABC abc</div>
     </section>
   </div>
 
   <script>
+    const text = document.getElementById("text");
+    const size = document.getElementById("size");
+    const sizeVal = document.getElementById("sizeVal");
+    const track = document.getElementById("track");
+    const trackVal = document.getElementById("trackVal");
     const stainSample = document.getElementById("stainSample");
-    const candaraSample = document.getElementById("candaraSample");
-    const pairStain = document.getElementById("pairStain");
-    const pairCandara = document.getElementById("pairCandara");
-    const playStain = document.getElementById("playStain");
-    const playCandara = document.getElementById("playCandara");
+    const sysSample = document.getElementById("sysSample");
 
-    const stainSize = document.getElementById("stainSize");
-    const candaraSize = document.getElementById("candaraSize");
-    const pairSize = document.getElementById("pairSize");
-    const playInput = document.getElementById("playInput");
-
-    const sync = (input, els) => {
-      const apply = () => {
-        const v = input.value;
-        els.forEach(e => e.style.fontSize = v + "px");
-      };
-      input.addEventListener("input", apply);
-      apply();
+    const update = () => {
+      const v = text.value || "ABC abc";
+      const fs = size.valueAsNumber || 40;
+      const ls = (track.valueAsNumber || 0) / 100;
+      sizeVal.textContent = fs + "px";
+      trackVal.textContent = ls.toFixed(2) + "em";
+      [stainSample, sysSample].forEach(el => {
+        el.textContent = v;
+        el.style.fontSize = fs + "px";
+        el.style.letterSpacing = ls + "em";
+      });
     };
 
-    sync(stainSize, [stainSample]);
-    sync(candaraSize, [candaraSample]);
-    sync(pairSize, [pairStain, pairCandara, playStain, playCandara]);
-
-    playInput.addEventListener("input", () => {
-      const v = playInput.value || "Stain ABC abc";
-      playStain.textContent = v;
-      playCandara.textContent = v;
-    });
+    text.addEventListener("input", update);
+    size.addEventListener("input", update);
+    track.addEventListener("input", update);
+    update();
   </script>
 </body>
 </html>
