diff --git a/docs/astro.config.mjs b/docs/astro.config.mjs
index dceda60..fa7458a 100644
--- a/docs/astro.config.mjs
+++ b/docs/astro.config.mjs
@@ -10,6 +10,9 @@ export default defineConfig({
     starlight({
       title: 'mcltspice',
       tagline: 'LTspice circuit simulation via MCP',
+      components: {
+        Hero: './src/components/Hero.astro',
+      },
       social: [
         { icon: 'external', label: 'Gitea', href: 'https://git.supported.systems/MCP/mcltspice' },
         { icon: 'external', label: 'PyPI', href: 'https://pypi.org/project/mcltspice/' },
diff --git a/docs/public/spirals_shrt.mp3 b/docs/public/spirals_shrt.mp3
new file mode 100644
index 0000000..7f00e84
Binary files /dev/null and b/docs/public/spirals_shrt.mp3 differ
diff --git a/docs/src/components/Hero.astro b/docs/src/components/Hero.astro
new file mode 100644
index 0000000..4dea1c0
--- /dev/null
+++ b/docs/src/components/Hero.astro
@@ -0,0 +1,156 @@
+---
+/**
+ * Custom Hero override for Starlight.
+ * On splash pages: injects the oscilloscope display in the image area.
+ * On other pages: delegates to the default Starlight Hero.
+ */
+import { Image } from 'astro:assets';
+import { LinkButton } from '@astrojs/starlight/components';
+import OscilloscopeDisplay from './OscilloscopeDisplay.astro';
+
+const PAGE_TITLE_ID = '_top';
+
+const { data } = Astro.locals.starlightRoute.entry;
+const { title = data.title, tagline, image, actions = [] } = data.hero || {};
+const isSplash = data.template === 'splash';
+
+const imageAttrs = {
+  loading: 'eager' as const,
+  decoding: 'async' as const,
+  width: 400,
+  height: 400,
+  alt: image?.alt || '',
+};
+
+let darkImage: ImageMetadata | undefined;
+let lightImage: ImageMetadata | undefined;
+let rawHtml: string | undefined;
+
+if (image) {
+  if ('file' in image) {
+    darkImage = image.file;
+  } else if ('dark' in image) {
+    darkImage = image.dark;
+    lightImage = image.light;
+  } else {
+    rawHtml = image.html;
+  }
+}
+---
+
+<div class="hero">
+  {isSplash ? (
+    <div class="hero-html sl-flex">
+      <OscilloscopeDisplay />
+    </div>
+  ) : (
+    <>
+      {darkImage && (
+        <Image
+          src={darkImage}
+          {...imageAttrs}
+          class:list={{ 'light:sl-hidden': Boolean(lightImage) }}
+        />
+      )}
+      {lightImage && <Image src={lightImage} {...imageAttrs} class="dark:sl-hidden" />}
+      {rawHtml && <div class="hero-html sl-flex" set:html={rawHtml} />}
+    </>
+  )}
+  <div class="sl-flex stack">
+    <div class="sl-flex copy">
+      <h1 id={PAGE_TITLE_ID} data-page-title set:html={title} />
+      {tagline && <div class="tagline" set:html={tagline} />}
+    </div>
+    {actions.length > 0 && (
+      <div class="sl-flex actions">
+        {actions.map(
+          ({ attrs: { class: className, ...attrs } = {}, icon, link: href, text, variant }) => (
+            <LinkButton {href} {variant} icon={icon?.name} class:list={[className]} {...attrs}>
+              {text}
+              {icon?.html && <Fragment set:html={icon.html} />}
+            </LinkButton>
+          )
+        )}
+      </div>
+    )}
+  </div>
+</div>
+
+<style>
+  @layer starlight.core {
+    .hero {
+      display: grid;
+      align-items: center;
+      gap: 1rem;
+      padding-bottom: 1rem;
+    }
+
+    .hero > img,
+    .hero > .hero-html {
+      object-fit: contain;
+      width: min(70%, 20rem);
+      height: auto;
+      margin-inline: auto;
+    }
+
+    .stack {
+      flex-direction: column;
+      gap: clamp(1.5rem, calc(1.5rem + 1vw), 2rem);
+      text-align: center;
+    }
+
+    .copy {
+      flex-direction: column;
+      gap: 1rem;
+      align-items: center;
+    }
+
+    .copy > * {
+      max-width: 50ch;
+    }
+
+    h1 {
+      font-size: clamp(var(--sl-text-3xl), calc(0.25rem + 5vw), var(--sl-text-6xl));
+      line-height: var(--sl-line-height-headings);
+      font-weight: 600;
+      color: var(--sl-color-white);
+    }
+
+    .tagline {
+      font-size: clamp(var(--sl-text-base), calc(0.0625rem + 2vw), var(--sl-text-xl));
+      color: var(--sl-color-gray-2);
+    }
+
+    .actions {
+      gap: 1rem 2rem;
+      flex-wrap: wrap;
+      justify-content: center;
+    }
+
+    @media (min-width: 50rem) {
+      .hero {
+        grid-template-columns: 7fr 4fr;
+        gap: 3%;
+        padding-block: clamp(2.5rem, calc(1rem + 10vmin), 10rem);
+      }
+
+      .hero > img,
+      .hero > .hero-html {
+        order: 2;
+        width: min(100%, 25rem);
+      }
+
+      .stack {
+        text-align: start;
+      }
+
+      .copy {
+        align-items: flex-start;
+      }
+
+      .actions {
+        justify-content: flex-start;
+      }
+    }
+  }
+</style>
diff --git a/docs/src/components/OscilloscopeDisplay.astro b/docs/src/components/OscilloscopeDisplay.astro
new file mode 100644
index 0000000..34c8cb5
--- /dev/null
+++ b/docs/src/components/OscilloscopeDisplay.astro
@@ -0,0 +1,256 @@
+---
+/**
+ * XY-mode audio oscilloscope display.
+ * Visual style inspired by the Tektronix 465 (1972).
+ * Renders stereo audio as Lissajous patterns on a canvas.
+ *
+ * Audio: "Spirals" by Jerobeam Fenderson (oscilloscopemusic.com)
+ *   License: CC BY-NC-SA 4.0
+ * Original visual: Nick Watton (codepen.io/2Mogs)
+ * Gist: rsp2k (gist.github.com/rsp2k/ac68b1bb290b8124e162987ed1df8d53)
+ * Modernized: ScriptProcessor → AnalyserNode + rAF
+ */
+---
+
+<div class="scope-frame">
+  <!-- Top brand bar -->
+  <div class="scope-brand">
+    <span class="scope-brand-name">Tektronix</span>
+    <span class="scope-brand-model">mcltspice</span>
+  </div>
+
+  <!-- Recessed CRT bay -->
+  <div class="scope-crt-bay">
+    <div class="scope-screen" data-idle="true">
+      <canvas
+        class="scope-canvas"
+        id="scope-canvas"
+        width="512"
+        height="512"
+        role="img"
+        aria-label="XY oscilloscope displaying Lissajous patterns from stereo audio"
+      ></canvas>
+      <div class="scope-graticule"></div>
+      <div class="scope-scanlines"></div>
+    </div>
+  </div>
+
+  <!-- Control panel -->
+  <div class="scope-panel">
+    <div class="scope-controls-row">
+      <!-- VERTICAL section -->
+      <div class="scope-section">
+        <span class="scope-section-label">Vertical</span>
+        <div class="scope-knob" aria-hidden="true"></div>
+        <span class="scope-knob-label">Volts/Div</span>
+      </div>
+
+      <!-- HORIZONTAL section -->
+      <div class="scope-section">
+        <span class="scope-section-label">Horizontal</span>
+        <div class="scope-knob" aria-hidden="true"></div>
+        <span class="scope-knob-label">Time/Div</span>
+      </div>
+
+      <!-- TRIGGER / POWER section -->
+      <div class="scope-section">
+        <span class="scope-section-label">Trigger</span>
+        <button
+          class="scope-toggle"
+          id="scope-toggle"
+          type="button"
+          data-active="false"
+          aria-label="Start oscilloscope audio"
+        >&#x23FB; on</button>
+        <div class="scope-led" id="scope-led" data-on="false" aria-hidden="true"></div>
+      </div>
+    </div>
+  </div>
+
+  <!-- Attribution -->
+  <div class="scope-attribution-bar">
+    <div class="scope-attribution">
+      "<a href="http://oscilloscopemusic.com/" target="_blank" rel="noopener">Spirals</a>" by Jerobeam Fenderson
+      (<a href="https://creativecommons.org/licenses/by-nc-sa/4.0/" target="_blank" rel="noopener license">CC BY-NC-SA</a>)
+      · Visual: <a href="https://codepen.io/2Mogs" target="_blank" rel="noopener">Nick Watton</a>
+      · <a href="https://gist.github.com/rsp2k/ac68b1bb290b8124e162987ed1df8d53" target="_blank" rel="noopener">rsp2k</a>
+    </div>
+  </div>
+</div>
+
+<audio id="scope-audio" src="/spirals_shrt.mp3" loop preload="none"></audio>
+
+<script>
+  // ── Oscilloscope XY renderer ──────────────────────────────
+  // Uses AnalyserNode (modern Web Audio) instead of deprecated ScriptProcessor
+  function initScope() {
+    const canvas = document.getElementById('scope-canvas') as HTMLCanvasElement | null;
+    const toggle = document.getElementById('scope-toggle') as HTMLButtonElement | null;
+    const audio = document.getElementById('scope-audio') as HTMLAudioElement | null;
+    const screen = canvas?.closest('.scope-screen') as HTMLElement | null;
+    const led = document.getElementById('scope-led') as HTMLElement | null;
+
+    if (!canvas || !toggle || !audio || !screen) return;
+
+    const ctx = canvas.getContext('2d');
+    if (!ctx) return;
+
+    // Draw idle state: faint center dot
+    drawIdle(ctx, canvas.width, canvas.height);
+
+    let audioCtx: AudioContext | null = null;
+    let analyserL: AnalyserNode | null = null;
+    let analyserR: AnalyserNode | null = null;
+    let animId: number | null = null;
+    let isRunning = false;
+    let source: MediaElementAudioSourceNode | null = null;
+
+    // Check reduced motion preference
+    const prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+
+    toggle.addEventListener('click', async () => {
+      if (isRunning) {
+        stop();
+      } else {
+        await start();
+      }
+    });
+
+    async function start() {
+      try {
+        // Create audio context on user gesture (required by browsers)
+        if (!audioCtx) {
+          audioCtx = new AudioContext();
+
+          // Connect: audio → source → splitter → 2x analyser → destination
+          source = audioCtx.createMediaElementSource(audio!);
+          const splitter = audioCtx.createChannelSplitter(2);
+
+          analyserL = audioCtx.createAnalyser();
+          analyserR = audioCtx.createAnalyser();
+
+          // 2048 samples gives smooth Lissajous curves
+          analyserL.fftSize = 2048;
+          analyserR.fftSize = 2048;
+
+          source.connect(splitter);
+          splitter.connect(analyserL, 0);
+          splitter.connect(analyserR, 1);
+
+          // Also connect to destination so we hear the audio
+          source.connect(audioCtx.destination);
+        }
+
+        if (audioCtx.state === 'suspended') {
+          await audioCtx.resume();
+        }
+
+        await audio!.play();
+        isRunning = true;
+        screen!.dataset.idle = 'false';
+        toggle.dataset.active = 'true';
+        toggle.innerHTML = '&#x23FB; off';
+        toggle.setAttribute('aria-label', 'Stop oscilloscope audio');
+        if (led) led.dataset.on = 'true';
+
+        if (!prefersReducedMotion) {
+          renderLoop();
+        } else {
+          // Reduced motion: render a single static frame after a brief delay
+          setTimeout(() => renderFrame(), 200);
+        }
+      } catch (e) {
+        console.error('Oscilloscope audio failed:', e);
+      }
+    }
+
+    function stop() {
+      audio!.pause();
+      isRunning = false;
+      screen!.dataset.idle = 'true';
+      toggle.dataset.active = 'false';
+      toggle.innerHTML = '&#x23FB; on';
+      toggle.setAttribute('aria-label', 'Start oscilloscope audio');
+      if (led) led.dataset.on = 'false';
+
+      if (animId !== null) {
+        cancelAnimationFrame(animId);
+        animId = null;
+      }
+
+      // Fade to idle
+      drawIdle(ctx!, canvas!.width, canvas!.height);
+    }
+
+    function renderLoop() {
+      if (!isRunning) return;
+      renderFrame();
+      animId = requestAnimationFrame(renderLoop);
+    }
+
+    function renderFrame() {
+      if (!analyserL || !analyserR || !ctx) return;
+
+      const bufLen = analyserL.frequencyBinCount;
+      const dataL = new Float32Array(bufLen);
+      const dataR = new Float32Array(bufLen);
+
+      analyserL.getFloatTimeDomainData(dataL);
+      analyserR.getFloatTimeDomainData(dataR);
+
+      const w = canvas!.width;
+      const h = canvas!.height;
+      const cx = w / 2;
+      const cy = h / 2;
+      const scale = w * 0.42;
+
+      // Fade previous frame (persistence of phosphor)
+      ctx.fillStyle = 'rgba(10, 10, 10, 0.25)';
+      ctx.fillRect(0, 0, w, h);
+
+      // Draw dots -- teal phosphor (#2dd4bf)
+      const dotSize = 1.5;
+      for (let i = 0; i < bufLen; i++) {
+        const x = cx + dataR[i] * scale;
+        const y = cy - dataL[i] * scale;
+
+        // Brighter center, dimmer edges (simulate beam intensity)
+        const dist = Math.sqrt(dataL[i] * dataL[i] + dataR[i] * dataR[i]);
+        const alpha = Math.max(0.3, 1.0 - dist * 0.4);
+
+        ctx.fillStyle = `rgba(45, 212, 191, ${alpha})`;
+        ctx.fillRect(x - dotSize / 2, y - dotSize / 2, dotSize, dotSize);
+      }
+    }
+
+    // Cleanup on navigation (Astro view transitions or SPA)
+    document.addEventListener('astro:before-swap', () => {
+      stop();
+      if (audioCtx) {
+        audioCtx.close();
+        audioCtx = null;
+      }
+    });
+  }
+
+  function drawIdle(ctx: CanvasRenderingContext2D, w: number, h: number) {
+    ctx.fillStyle = '#0a0a0a';
+    ctx.fillRect(0, 0, w, h);
+
+    // Faint center dot
+    ctx.fillStyle = 'rgba(45, 212, 191, 0.15)';
+    ctx.beginPath();
+    ctx.arc(w / 2, h / 2, 3, 0, Math.PI * 2);
+    ctx.fill();
+  }
+
+  // Init when DOM ready (works with Astro's page lifecycle)
+  if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', initScope);
+  } else {
+    initScope();
+  }
+
+  // Re-init on Astro page transitions
+  document.addEventListener('astro:page-load', initScope);
+</script>
diff --git a/docs/src/styles/custom.css b/docs/src/styles/custom.css
index 4370c28..91b7b76 100644
--- a/docs/src/styles/custom.css
+++ b/docs/src/styles/custom.css
@@ -3,6 +3,7 @@
 
 @import "@astrojs/starlight-tailwind";
 @import "tailwindcss";
+@import "./oscilloscope.css";
 
 :root {
   --sl-color-accent-low: #083344;    /* teal-950 */
diff --git a/docs/src/styles/oscilloscope.css b/docs/src/styles/oscilloscope.css
new file mode 100644
index 0000000..bc443b9
--- /dev/null
+++ b/docs/src/styles/oscilloscope.css
@@ -0,0 +1,343 @@
+/* Oscilloscope display -- Tektronix 465 inspired
+ * Tan/champagne panel, recessed CRT, teal phosphor
+ * Designed for mcltspice docs hero section */
+
+/* ── Outer chassis ───────────────────────────────────────── */
+.scope-frame {
+  --scope-teal: #2dd4bf;
+  --scope-teal-dim: rgba(45, 212, 191, 0.12);
+  --scope-teal-glow: rgba(45, 212, 191, 0.18);
+  --scope-panel: #b5a48a;
+  --scope-panel-light: #c7b89e;
+  --scope-panel-dark: #9e8f78;
+  --scope-crt-bg: #0a0a0a;
+  --scope-label: #3b3428;
+  --scope-knob: #2a2a2d;
+  --scope-knob-ring: #1e1e20;
+  --scope-section-line: rgba(59, 52, 40, 0.25);
+
+  position: relative;
+  background:
+    /* subtle metallic grain */
+    url("data:image/svg+xml,%3Csvg width='4' height='4' xmlns='http://www.w3.org/2000/svg'%3E%3Crect width='1' height='1' x='0' y='0' fill='rgba(0,0,0,0.03)'/%3E%3Crect width='1' height='1' x='2' y='2' fill='rgba(255,255,255,0.02)'/%3E%3C/svg%3E"),
+    linear-gradient(175deg, var(--scope-panel-light), var(--scope-panel), var(--scope-panel-dark));
+  border-radius: 6px;
+  padding: 0;
+  box-shadow:
+    0 10px 30px rgba(0, 0, 0, 0.55),
+    0 2px 6px rgba(0, 0, 0, 0.3),
+    inset 0 1px 0 rgba(255, 255, 255, 0.15),
+    inset 0 -1px 0 rgba(0, 0, 0, 0.1);
+  max-width: 340px;
+  width: 100%;
+  margin: 0 auto;
+  overflow: hidden;
+}
+
+/* ── Top brand bar ───────────────────────────────────────── */
+.scope-brand {
+  display: flex;
+  align-items: baseline;
+  justify-content: space-between;
+  padding: 8px 14px 6px;
+  border-bottom: 1px solid var(--scope-section-line);
+}
+
+.scope-brand-name {
+  font-family: 'Georgia', 'Times New Roman', serif;
+  font-size: 0.65rem;
+  font-weight: 700;
+  letter-spacing: 0.18em;
+  text-transform: uppercase;
+  color: var(--scope-label);
+  opacity: 0.75;
+}
+
+.scope-brand-model {
+  font-family: var(--sl-font-mono, ui-monospace, monospace);
+  font-size: 0.55rem;
+  font-weight: 600;
+  letter-spacing: 0.08em;
+  text-transform: uppercase;
+  color: var(--scope-label);
+  opacity: 0.55;
+}
+
+/* ── CRT bay (recessed dark area) ────────────────────────── */
+.scope-crt-bay {
+  margin: 10px 12px 0;
+  background: #1a1816;
+  border-radius: 4px;
+  padding: 6px;
+  box-shadow:
+    inset 0 2px 6px rgba(0, 0, 0, 0.5),
+    inset 0 0 0 1px rgba(0, 0, 0, 0.2);
+}
+
+/* ── CRT screen ──────────────────────────────────────────── */
+.scope-screen {
+  position: relative;
+  background: var(--scope-crt-bg);
+  border-radius: 3px;
+  overflow: hidden;
+  aspect-ratio: 1;
+  box-shadow:
+    0 0 15px var(--scope-teal-glow),
+    inset 0 1px 4px rgba(0, 0, 0, 0.4);
+}
+
+/* ── Canvas ──────────────────────────────────────────────── */
+.scope-canvas {
+  display: block;
+  width: 100%;
+  height: 100%;
+}
+
+/* ── Graticule overlay (8x10 grid, like the 465) ─────────── */
+.scope-graticule {
+  position: absolute;
+  inset: 0;
+  pointer-events: none;
+  /* 10 horizontal, 8 vertical — classic Tek grid */
+  background-image:
+    repeating-linear-gradient(
+      90deg,
+      transparent,
+      transparent calc(12.5% - 0.5px),
+      rgba(45, 212, 191, 0.07) calc(12.5% - 0.5px),
+      rgba(45, 212, 191, 0.07) calc(12.5% + 0.5px),
+      transparent calc(12.5% + 0.5px)
+    ),
+    repeating-linear-gradient(
+      0deg,
+      transparent,
+      transparent calc(12.5% - 0.5px),
+      rgba(45, 212, 191, 0.07) calc(12.5% - 0.5px),
+      rgba(45, 212, 191, 0.07) calc(12.5% + 0.5px),
+      transparent calc(12.5% + 0.5px)
+    );
+}
+
+/* Center crosshair tick marks */
+.scope-graticule::before,
+.scope-graticule::after {
+  content: '';
+  position: absolute;
+}
+
+.scope-graticule::before {
+  /* horizontal center tick */
+  top: 50%;
+  left: calc(50% - 8px);
+  width: 16px;
+  height: 1px;
+  background: rgba(45, 212, 191, 0.18);
+}
+
+.scope-graticule::after {
+  /* vertical center tick */
+  left: 50%;
+  top: calc(50% - 8px);
+  width: 1px;
+  height: 16px;
+  background: rgba(45, 212, 191, 0.18);
+}
+
+/* ── Scanline overlay ────────────────────────────────────── */
+.scope-scanlines {
+  position: absolute;
+  inset: 0;
+  pointer-events: none;
+  background: repeating-linear-gradient(
+    0deg,
+    transparent,
+    transparent 2px,
+    rgba(0, 0, 0, 0.04) 2px,
+    rgba(0, 0, 0, 0.04) 4px
+  );
+  mix-blend-mode: multiply;
+}
+
+/* ── Control panel area ──────────────────────────────────── */
+.scope-panel {
+  padding: 8px 12px 6px;
+  border-top: 1px solid var(--scope-section-line);
+  margin-top: 10px;
+}
+
+.scope-controls-row {
+  display: flex;
+  align-items: flex-start;
+  gap: 2px;
+}
+
+/* ── Control section (labeled group) ─────────────────────── */
+.scope-section {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 4px;
+  padding: 4px 2px;
+  position: relative;
+}
+
+/* Section divider lines */
+.scope-section + .scope-section::before {
+  content: '';
+  position: absolute;
+  left: -1px;
+  top: 0;
+  bottom: 0;
+  width: 1px;
+  background: var(--scope-section-line);
+}
+
+.scope-section-label {
+  font-family: var(--sl-font-mono, ui-monospace, monospace);
+  font-size: 0.45rem;
+  font-weight: 700;
+  letter-spacing: 0.12em;
+  text-transform: uppercase;
+  color: var(--scope-label);
+  opacity: 0.6;
+  line-height: 1;
+}
+
+/* ── Rotary knob ─────────────────────────────────────────── */
+.scope-knob {
+  width: 28px;
+  height: 28px;
+  border-radius: 50%;
+  background: radial-gradient(circle at 40% 35%, #3a3a3e, var(--scope-knob));
+  border: 2px solid var(--scope-knob-ring);
+  box-shadow:
+    0 2px 4px rgba(0, 0, 0, 0.35),
+    inset 0 1px 1px rgba(255, 255, 255, 0.06);
+  position: relative;
+}
+
+/* Knob indicator line */
+.scope-knob::after {
+  content: '';
+  position: absolute;
+  top: 3px;
+  left: 50%;
+  width: 1.5px;
+  height: 7px;
+  background: #d4d0c8;
+  border-radius: 1px;
+  transform: translateX(-50%);
+}
+
+.scope-knob-label {
+  font-family: var(--sl-font-mono, ui-monospace, monospace);
+  font-size: 0.4rem;
+  letter-spacing: 0.05em;
+  text-transform: uppercase;
+  color: var(--scope-label);
+  opacity: 0.5;
+  line-height: 1;
+}
+
+/* ── Power toggle ────────────────────────────────────────── */
+.scope-toggle {
+  appearance: none;
+  background: var(--scope-knob);
+  border: 2px solid var(--scope-knob-ring);
+  border-radius: 6px;
+  color: #8a8880;
+  font-family: var(--sl-font-mono, ui-monospace, monospace);
+  font-size: 0.55rem;
+  font-weight: 700;
+  letter-spacing: 0.06em;
+  padding: 5px 8px;
+  cursor: pointer;
+  transition: color 0.2s, box-shadow 0.2s;
+  text-transform: uppercase;
+  line-height: 1;
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
+}
+
+.scope-toggle:hover {
+  color: #c4c0b8;
+}
+
+.scope-toggle[data-active="true"] {
+  color: var(--scope-teal);
+  box-shadow:
+    0 2px 4px rgba(0, 0, 0, 0.3),
+    0 0 6px var(--scope-teal-glow);
+}
+
+.scope-toggle:focus-visible {
+  outline: 2px solid var(--scope-teal);
+  outline-offset: 2px;
+}
+
+/* ── Power LED ───────────────────────────────────────────── */
+.scope-led {
+  width: 5px;
+  height: 5px;
+  border-radius: 50%;
+  background: #3a3632;
+  border: 1px solid rgba(0, 0, 0, 0.3);
+  transition: background 0.3s, box-shadow 0.3s;
+}
+
+.scope-led[data-on="true"] {
+  background: var(--scope-teal);
+  box-shadow: 0 0 6px var(--scope-teal-glow);
+}
+
+/* ── Attribution bar ─────────────────────────────────────── */
+.scope-attribution-bar {
+  padding: 5px 14px 7px;
+  border-top: 1px solid var(--scope-section-line);
+}
+
+.scope-attribution {
+  font-family: var(--sl-font-mono, ui-monospace, monospace);
+  font-size: 0.45rem;
+  color: var(--scope-panel-dark);
+  line-height: 1.4;
+  text-align: center;
+}
+
+.scope-attribution a {
+  color: var(--scope-label);
+  text-decoration: none;
+  transition: color 0.15s;
+}
+
+.scope-attribution a:hover {
+  color: #1a1610;
+}
+
+/* ── Idle state ──────────────────────────────────────────── */
+.scope-screen[data-idle="true"] .scope-canvas {
+  opacity: 0.6;
+}
+
+/* ── Reduced motion ──────────────────────────────────────── */
+@media (prefers-reduced-motion: reduce) {
+  .scope-scanlines {
+    display: none;
+  }
+}
+
+/* ── Responsive ──────────────────────────────────────────── */
+@media (max-width: 50rem) {
+  .scope-frame {
+    max-width: 280px;
+  }
+
+  .scope-knob {
+    width: 24px;
+    height: 24px;
+  }
+
+  .scope-knob::after {
+    height: 5px;
+  }
+}