diff --git a/CLAUDE.md b/CLAUDE.md
index fdbf38b..701acc8 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -8,13 +8,16 @@ Collection of interactive calculators visualizing how seemingly small difference
 
 ## Architecture
 
-Static site in `public/` — no build system, no package manager. Serve `public/` as the site root. Each topic gets its own subdirectory with `index.html`, `style.css`, `app.js`.
+Static site in `public/` — no build system, no package manager. Serve `public/` as the site root. Each topic gets its own subdirectory with `index.html` and `app.js`.
+
+### Shared CSS
+
+`public/style.css` — Shared stylesheet used by all calculators (referenced as `../style.css`). CSS custom properties in `:root`, CSS Grid layouts, responsive breakpoints at 560px/480px/360px. Calculators can add a supplementary `<style>` block or extra CSS file for page-specific styles if needed.
 
 ### Shared pattern (all calculators)
 
-Each calculator directory contains three files following the same pattern:
-- `index.html` — Header, range-slider controls, stat cards, chart canvases, explainer section
-- `style.css` — Identical copy across all calculators. CSS custom properties in `:root`, CSS Grid layouts, responsive breakpoints at 560px/480px/360px
+Each calculator directory contains two files following the same pattern:
+- `index.html` — Header, range-slider controls, stat cards, chart canvases, explainer section. Links to `../style.css`.
 - `app.js` — Self-contained logic with `fmtKr()`, `fmtShort()`, `getData()`, `baseOpts()`, `update()`. Charts update with `'none'` animation mode.
 
 ### Calculators
diff --git a/TODO.md b/TODO.md
new file mode 100644
index 0000000..4e9fa89
--- /dev/null
+++ b/TODO.md
@@ -0,0 +1,5 @@
+# TODO
+
+## Nye kalkulatorer
+
+- [ ] **BNP per innbygger (internasjonale forskjeller)** — Ny kalkulator i `public/verden/` som viser hvordan forskjeller i BNP per innbygger mellom land vokser over tid med prosentvis vekst. Samme prosentvise vekst gir stadig større absolutt gap mellom rike og fattige land.
diff --git a/public/arv/index.html b/public/arv/index.html
index ffd609f..9f87bcc 100644
--- a/public/arv/index.html
+++ b/public/arv/index.html
@@ -6,7 +6,7 @@
 <title>Arvens forsprang — interaktiv kalkulator</title>
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link href="https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,600;1,9..144,300&family=DM+Sans:wght@300;400;500&display=swap" rel="stylesheet">
-<link rel="stylesheet" href="style.css">
+<link rel="stylesheet" href="../style.css">
 <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/4.4.1/chart.umd.js"></script>
 </head>
 <body>
@@ -15,12 +15,12 @@
   <p class="eyebrow">Lik innsats. Ulikt utgangspunkt.</p>
   <h1>Arvens<br><em>forsprang</em></h1>
   <p class="lead">Person A starter fra null. Person B arver en sum. Begge sparer likt — men gapet lukkes aldri. Se hvordan arv forsterkes over tid.</p>
-  <div class="stamp">Ulik startlinje</div>
+  <div class="stamp">Fødselsloteriet</div>
 </header>
 
 <div class="small-diff-banner">
   <span class="sd-icon">↗</span>
-  <span>En arv på <strong>500 000 kr</strong> vokser til over <strong id="banner-gap">—</strong> på 30 år — uten at B løfter en finger.</span>
+  <span>Pass på å velge rike foreldre. En arv på <strong>500 000 kr</strong> vokser til over <strong id="banner-gap">—</strong> på 30 år — uten at B løfter en finger.</span>
 </div>
 
 <main>
diff --git a/public/bolig/index.html b/public/bolig/index.html
index 6e0fee5..2bd8d7f 100644
--- a/public/bolig/index.html
+++ b/public/bolig/index.html
@@ -6,7 +6,7 @@
 <title>Boligforskjellen vokser — interaktiv kalkulator</title>
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link href="https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,600;1,9..144,300&family=DM+Sans:wght@300;400;500&display=swap" rel="stylesheet">
-<link rel="stylesheet" href="style.css">
+<link rel="stylesheet" href="../style.css">
 <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/4.4.1/chart.umd.js"></script>
 </head>
 <body>
@@ -15,7 +15,7 @@
   <p class="eyebrow">Samme prisvekst. Ikke det samme resultatet.</p>
   <h1>Boligforskjellen<br><em>forsterkes</em></h1>
   <p class="lead">To boliger med ulik pris stiger like mye i prosent — men belåningen forsterker gapet i egenkapital dramatisk.</p>
-  <div class="stamp">Belåningseffekten</div>
+  <div class="stamp">Boligfesten</div>
 </header>
 
 <div class="small-diff-banner">
diff --git a/public/bolig/style.css b/public/bolig/style.css
deleted file mode 100644
index 8db04e6..0000000
--- a/public/bolig/style.css
+++ /dev/null
@@ -1,370 +0,0 @@
-*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
-
-:root {
-  --bg: #f5f2eb;
-  --bg2: #ede9e0;
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-  --accent: #c0392b;
-  --accent2: #2c6e49;
-  --blue: #1a4a8a;
-  --amber: #b5620a;
-  --purple: #4a3a8a;
-  --border: rgba(26,23,20,0.12);
-  --radius: 4px;
-}
-
-html { scroll-behavior: smooth; }
-
-body {
-  font-family: 'DM Sans', sans-serif;
-  background: var(--bg);
-  color: var(--ink);
-  font-size: 16px;
-  line-height: 1.6;
-  min-height: 100vh;
-}
-
-/* HEADER */
-header {
-  background: var(--ink);
-  color: var(--bg);
-  padding: 3.5rem 2rem 3rem;
-  text-align: center;
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-    rgba(255,255,255,0.02) 41px
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-  color: rgba(245,242,235,0.65);
-  max-width: 560px;
-  margin: 0 auto;
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-  line-height: 1.7;
-}
-
-/* MAIN LAYOUT */
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-  max-width: 900px;
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-  padding: 2.5rem 1.25rem 4rem;
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-
-/* CONTROLS CARD */
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-@media (max-width: 560px) {
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-
-.control-group label {
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-.control-group input[type=range] {
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-}
-.control-group input[type=range]::-webkit-slider-thumb {
-  -webkit-appearance: none;
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-.control-group input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.2); }
-.control-group input[type=range]::-moz-range-thumb {
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-.control-group .val-display {
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-
-/* STAT STRIP */
-.stat-strip {
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-  grid-template-columns: repeat(4, 1fr);
-  gap: 10px;
-  margin-bottom: 2.5rem;
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-@media (max-width: 600px) {
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-@media (max-width: 360px) {
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-.stat {
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-  border: 1px solid var(--border);
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-}
-.stat-label {
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-  color: var(--ink3);
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-.stat-value {
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-.stat-sub {
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-  color: var(--ink3);
-  margin-top: 0.2rem;
-}
-
-/* CHART SECTIONS */
-.chart-section {
-  background: #fff;
-  border: 1px solid var(--border);
-  border-radius: 8px;
-  padding: 1.5rem;
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-.chart-header {
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-  justify-content: space-between;
-  margin-bottom: 1rem;
-  gap: 1rem;
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-.chart-title {
-  font-family: 'Fraunces', serif;
-  font-size: 1.1rem;
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-.chart-desc {
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-
-/* INSIGHT BOX */
-.insight {
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-.insight strong { color: var(--ink); font-weight: 500; }
-
-/* EXPLAINER */
-.explainer {
-  background: var(--bg3);
-  border: 1px solid var(--border);
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-  padding: 1.75rem 2rem;
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-.explainer h3 {
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-
-/* FORMULA */
-.formula-box {
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-/* STAMP */
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-/* FOOTER */
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-.h-200 { height: 200px; }
-@media (max-width: 480px) {
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diff --git a/public/lonn/index.html b/public/lonn/index.html
index 4b5d4e8..bb95ce8 100644
--- a/public/lonn/index.html
+++ b/public/lonn/index.html
@@ -6,7 +6,7 @@
 <title>Lønnsforskjellen vokser — interaktiv kalkulator</title>
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link href="https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,600;1,9..144,300&family=DM+Sans:wght@300;400;500&display=swap" rel="stylesheet">
-<link rel="stylesheet" href="style.css">
+<link rel="stylesheet" href="../style.css">
 <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/4.4.1/chart.umd.js"></script>
 </head>
 <body>
diff --git a/public/lonn/style.css b/public/lonn/style.css
deleted file mode 100644
index 8db04e6..0000000
--- a/public/lonn/style.css
+++ /dev/null
@@ -1,370 +0,0 @@
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-
-:root {
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-  --purple: #4a3a8a;
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-/* HEADER */
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-  background: #fff;
-  border: 1px solid var(--border);
-  border-radius: 8px;
-  padding: 1.5rem;
-  margin-bottom: 1.25rem;
-}
-.chart-header {
-  display: flex;
-  align-items: flex-start;
-  justify-content: space-between;
-  margin-bottom: 1rem;
-  gap: 1rem;
-  flex-wrap: wrap;
-}
-.chart-title {
-  font-family: 'Fraunces', serif;
-  font-size: 1.1rem;
-  font-weight: 600;
-  color: var(--ink);
-}
-.chart-desc {
-  font-size: 13px;
-  color: var(--ink3);
-  margin-top: 2px;
-}
-.legend {
-  display: flex;
-  gap: 14px;
-  font-size: 12px;
-  color: var(--ink2);
-  flex-wrap: wrap;
-  align-items: center;
-}
-.legend span { display: flex; align-items: center; gap: 5px; }
-.swatch {
-  width: 10px; height: 10px;
-  border-radius: 2px;
-  flex-shrink: 0;
-  display: inline-block;
-}
-.swatch.dashed {
-  background: linear-gradient(90deg, var(--sw-color) 50%, transparent 50%);
-  background-size: 6px 2px;
-  background-repeat: repeat-x;
-  background-position: center;
-  background-color: transparent;
-  height: 2px;
-  width: 18px;
-  border-radius: 0;
-}
-.chart-wrap {
-  position: relative;
-  width: 100%;
-}
-
-/* INSIGHT BOX */
-.insight {
-  background: var(--bg2);
-  border-left: 3px solid var(--accent);
-  border-radius: 0 6px 6px 0;
-  padding: 1rem 1.25rem;
-  margin-bottom: 1.25rem;
-  font-size: 0.95rem;
-  color: var(--ink2);
-  line-height: 1.65;
-}
-.insight strong { color: var(--ink); font-weight: 500; }
-
-/* EXPLAINER */
-.explainer {
-  background: var(--bg3);
-  border: 1px solid var(--border);
-  border-radius: 8px;
-  padding: 1.75rem 2rem;
-  margin-top: 2rem;
-}
-.explainer h3 {
-  font-family: 'Fraunces', serif;
-  font-size: 1.2rem;
-  font-weight: 600;
-  margin-bottom: 1rem;
-}
-.explainer p {
-  font-size: 0.95rem;
-  color: var(--ink2);
-  margin-bottom: 0.75rem;
-  line-height: 1.7;
-}
-.explainer p:last-child { margin-bottom: 0; }
-.explainer strong { color: var(--ink); font-weight: 500; }
-
-/* FORMULA */
-.formula-box {
-  background: var(--ink);
-  color: var(--bg);
-  border-radius: 6px;
-  padding: 1rem 1.25rem;
-  font-family: 'DM Sans', monospace;
-  font-size: 0.9rem;
-  margin: 1rem 0;
-  letter-spacing: 0.02em;
-  line-height: 1.8;
-}
-.formula-box span { color: #e8b4a0; }
-
-/* STAMP */
-.stamp {
-  display: inline-block;
-  position: relative;
-  margin-top: 2rem;
-  padding: 0.55rem 1.1rem;
-  border: 3px solid #e8b4a0;
-  border-radius: 4px;
-  font-family: 'Fraunces', serif;
-  font-size: clamp(0.75rem, 2.5vw, 0.95rem);
-  font-weight: 600;
-  letter-spacing: 0.12em;
-  text-transform: uppercase;
-  color: #e8b4a0;
-  opacity: 0.72;
-  transform: rotate(-4deg);
-  box-shadow: inset 0 0 0 2px rgba(232,180,160,0.18);
-  user-select: none;
-}
-.stamp::before {
-  content: '';
-  position: absolute;
-  inset: 3px;
-  border: 1px solid rgba(232,180,160,0.3);
-  border-radius: 2px;
-  pointer-events: none;
-}
-
-/* SMALL DIFF BANNER */
-.small-diff-banner {
-  background: var(--accent);
-  color: #fff;
-  padding: 1rem 2rem;
-  display: flex;
-  align-items: flex-start;
-  gap: 0.75rem;
-  font-size: clamp(0.88rem, 2vw, 1rem);
-  line-height: 1.6;
-}
-.small-diff-banner strong { font-weight: 500; }
-.sd-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 2px; }
-
-/* FOOTER */
-footer {
-  text-align: center;
-  padding: 2rem 1rem;
-  font-size: 12px;
-  color: var(--ink3);
-  border-top: 1px solid var(--border);
-  margin-top: 3rem;
-}
-footer a { color: var(--ink3); }
-
-/* RESPONSIVE CHART HEIGHTS */
-.h-240 { height: 240px; }
-.h-200 { height: 200px; }
-@media (max-width: 480px) {
-  .h-240 { height: 200px; }
-  .h-200 { height: 170px; }
-  .chart-section { padding: 1rem; }
-  main { padding: 1.5rem 1rem 3rem; }
-  .controls-card { padding: 1.25rem; }
-  .explainer { padding: 1.25rem; }
-}
diff --git a/public/sparing/index.html b/public/sparing/index.html
index 275e25a..a582ddb 100644
--- a/public/sparing/index.html
+++ b/public/sparing/index.html
@@ -6,7 +6,7 @@
 <title>Rentes rente — interaktiv kalkulator</title>
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link href="https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,300;0,9..144,600;1,9..144,300&family=DM+Sans:wght@300;400;500&display=swap" rel="stylesheet">
-<link rel="stylesheet" href="style.css">
+<link rel="stylesheet" href="../style.css">
 <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/4.4.1/chart.umd.js"></script>
 </head>
 <body>
@@ -15,7 +15,7 @@
   <p class="eyebrow">Samme sparebeløp. Ikke det samme resultatet.</p>
   <h1>Rentes rente<br><em>forsterker</em></h1>
   <p class="lead">Noen få prosentpoeng i avkastning ser ubetydelig ut — men over tid skaper de enorme forskjeller. Se hva rentes rente gjør med sparepengene dine.</p>
-  <div class="stamp">Tid i markedet</div>
+  <div class="stamp">Penger lager penger</div>
 </header>
 
 <div class="small-diff-banner">
diff --git a/public/sparing/style.css b/public/sparing/style.css
deleted file mode 100644
index 8db04e6..0000000
--- a/public/sparing/style.css
+++ /dev/null
@@ -1,370 +0,0 @@
-*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
-
-:root {
-  --bg: #f5f2eb;
-  --bg2: #ede9e0;
-  --bg3: #e4dfd3;
-  --ink: #1a1714;
-  --ink2: #5a5650;
-  --ink3: #8a857e;
-  --accent: #c0392b;
-  --accent2: #2c6e49;
-  --blue: #1a4a8a;
-  --amber: #b5620a;
-  --purple: #4a3a8a;
-  --border: rgba(26,23,20,0.12);
-  --radius: 4px;
-}
-
-html { scroll-behavior: smooth; }
-
-body {
-  font-family: 'DM Sans', sans-serif;
-  background: var(--bg);
-  color: var(--ink);
-  font-size: 16px;
-  line-height: 1.6;
-  min-height: 100vh;
-}
-
-/* HEADER */
-header {
-  background: var(--ink);
-  color: var(--bg);
-  padding: 3.5rem 2rem 3rem;
-  text-align: center;
-  position: relative;
-  overflow: hidden;
-}
-header::before {
-  content: '';
-  position: absolute;
-  inset: 0;
-  background: repeating-linear-gradient(
-    -45deg,
-    transparent,
-    transparent 40px,
-    rgba(255,255,255,0.02) 40px,
-    rgba(255,255,255,0.02) 41px
-  );
-}
-header .eyebrow {
-  font-size: 11px;
-  letter-spacing: 0.18em;
-  text-transform: uppercase;
-  color: rgba(245,242,235,0.5);
-  margin-bottom: 1rem;
-  font-weight: 400;
-}
-header h1 {
-  font-family: 'Fraunces', serif;
-  font-size: clamp(2.2rem, 6vw, 4rem);
-  font-weight: 600;
-  line-height: 1.1;
-  margin-bottom: 1rem;
-  position: relative;
-}
-header h1 em {
-  font-style: italic;
-  color: #e8b4a0;
-}
-header p.lead {
-  font-size: clamp(0.95rem, 2vw, 1.1rem);
-  color: rgba(245,242,235,0.65);
-  max-width: 560px;
-  margin: 0 auto;
-  font-weight: 300;
-  line-height: 1.7;
-}
-
-/* MAIN LAYOUT */
-main {
-  max-width: 900px;
-  margin: 0 auto;
-  padding: 2.5rem 1.25rem 4rem;
-}
-
-/* CONTROLS CARD */
-.controls-card {
-  background: var(--ink);
-  color: var(--bg);
-  border-radius: 8px;
-  padding: 2rem;
-  margin-bottom: 2.5rem;
-}
-.controls-card h2 {
-  font-family: 'Fraunces', serif;
-  font-size: 1rem;
-  font-weight: 300;
-  font-style: italic;
-  color: rgba(245,242,235,0.5);
-  margin-bottom: 1.5rem;
-  letter-spacing: 0.03em;
-}
-.controls-grid {
-  display: grid;
-  grid-template-columns: 1fr 1fr;
-  gap: 1.25rem 2rem;
-}
-@media (max-width: 560px) {
-  .controls-grid { grid-template-columns: 1fr; gap: 1rem; }
-}
-
-.control-group label {
-  display: block;
-  font-size: 12px;
-  letter-spacing: 0.08em;
-  text-transform: uppercase;
-  color: rgba(245,242,235,0.45);
-  margin-bottom: 0.5rem;
-  font-weight: 400;
-}
-.control-group .val-row {
-  display: flex;
-  align-items: center;
-  gap: 10px;
-}
-.control-group input[type=range] {
-  flex: 1;
-  -webkit-appearance: none;
-  height: 3px;
-  background: rgba(245,242,235,0.15);
-  border-radius: 2px;
-  outline: none;
-  cursor: pointer;
-}
-.control-group input[type=range]::-webkit-slider-thumb {
-  -webkit-appearance: none;
-  width: 16px; height: 16px;
-  border-radius: 50%;
-  background: var(--bg);
-  cursor: pointer;
-  transition: transform 0.1s;
-}
-.control-group input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.2); }
-.control-group input[type=range]::-moz-range-thumb {
-  width: 16px; height: 16px;
-  border-radius: 50%;
-  background: var(--bg);
-  cursor: pointer;
-  border: none;
-}
-.control-group .val-display {
-  font-size: 1rem;
-  font-weight: 500;
-  color: var(--bg);
-  min-width: 80px;
-  text-align: right;
-  font-variant-numeric: tabular-nums;
-}
-
-/* STAT STRIP */
-.stat-strip {
-  display: grid;
-  grid-template-columns: repeat(4, 1fr);
-  gap: 10px;
-  margin-bottom: 2.5rem;
-}
-@media (max-width: 600px) {
-  .stat-strip { grid-template-columns: 1fr 1fr; }
-}
-@media (max-width: 360px) {
-  .stat-strip { grid-template-columns: 1fr; }
-}
-.stat {
-  background: var(--bg2);
-  border: 1px solid var(--border);
-  border-radius: 6px;
-  padding: 1rem 1.1rem;
-}
-.stat-label {
-  font-size: 11px;
-  letter-spacing: 0.07em;
-  text-transform: uppercase;
-  color: var(--ink3);
-  margin-bottom: 0.35rem;
-}
-.stat-value {
-  font-size: 1.4rem;
-  font-weight: 500;
-  color: var(--ink);
-  font-variant-numeric: tabular-nums;
-  line-height: 1.2;
-}
-.stat-sub {
-  font-size: 12px;
-  color: var(--ink3);
-  margin-top: 0.2rem;
-}
-
-/* CHART SECTIONS */
-.chart-section {
-  background: #fff;
-  border: 1px solid var(--border);
-  border-radius: 8px;
-  padding: 1.5rem;
-  margin-bottom: 1.25rem;
-}
-.chart-header {
-  display: flex;
-  align-items: flex-start;
-  justify-content: space-between;
-  margin-bottom: 1rem;
-  gap: 1rem;
-  flex-wrap: wrap;
-}
-.chart-title {
-  font-family: 'Fraunces', serif;
-  font-size: 1.1rem;
-  font-weight: 600;
-  color: var(--ink);
-}
-.chart-desc {
-  font-size: 13px;
-  color: var(--ink3);
-  margin-top: 2px;
-}
-.legend {
-  display: flex;
-  gap: 14px;
-  font-size: 12px;
-  color: var(--ink2);
-  flex-wrap: wrap;
-  align-items: center;
-}
-.legend span { display: flex; align-items: center; gap: 5px; }
-.swatch {
-  width: 10px; height: 10px;
-  border-radius: 2px;
-  flex-shrink: 0;
-  display: inline-block;
-}
-.swatch.dashed {
-  background: linear-gradient(90deg, var(--sw-color) 50%, transparent 50%);
-  background-size: 6px 2px;
-  background-repeat: repeat-x;
-  background-position: center;
-  background-color: transparent;
-  height: 2px;
-  width: 18px;
-  border-radius: 0;
-}
-.chart-wrap {
-  position: relative;
-  width: 100%;
-}
-
-/* INSIGHT BOX */
-.insight {
-  background: var(--bg2);
-  border-left: 3px solid var(--accent);
-  border-radius: 0 6px 6px 0;
-  padding: 1rem 1.25rem;
-  margin-bottom: 1.25rem;
-  font-size: 0.95rem;
-  color: var(--ink2);
-  line-height: 1.65;
-}
-.insight strong { color: var(--ink); font-weight: 500; }
-
-/* EXPLAINER */
-.explainer {
-  background: var(--bg3);
-  border: 1px solid var(--border);
-  border-radius: 8px;
-  padding: 1.75rem 2rem;
-  margin-top: 2rem;
-}
-.explainer h3 {
-  font-family: 'Fraunces', serif;
-  font-size: 1.2rem;
-  font-weight: 600;
-  margin-bottom: 1rem;
-}
-.explainer p {
-  font-size: 0.95rem;
-  color: var(--ink2);
-  margin-bottom: 0.75rem;
-  line-height: 1.7;
-}
-.explainer p:last-child { margin-bottom: 0; }
-.explainer strong { color: var(--ink); font-weight: 500; }
-
-/* FORMULA */
-.formula-box {
-  background: var(--ink);
-  color: var(--bg);
-  border-radius: 6px;
-  padding: 1rem 1.25rem;
-  font-family: 'DM Sans', monospace;
-  font-size: 0.9rem;
-  margin: 1rem 0;
-  letter-spacing: 0.02em;
-  line-height: 1.8;
-}
-.formula-box span { color: #e8b4a0; }
-
-/* STAMP */
-.stamp {
-  display: inline-block;
-  position: relative;
-  margin-top: 2rem;
-  padding: 0.55rem 1.1rem;
-  border: 3px solid #e8b4a0;
-  border-radius: 4px;
-  font-family: 'Fraunces', serif;
-  font-size: clamp(0.75rem, 2.5vw, 0.95rem);
-  font-weight: 600;
-  letter-spacing: 0.12em;
-  text-transform: uppercase;
-  color: #e8b4a0;
-  opacity: 0.72;
-  transform: rotate(-4deg);
-  box-shadow: inset 0 0 0 2px rgba(232,180,160,0.18);
-  user-select: none;
-}
-.stamp::before {
-  content: '';
-  position: absolute;
-  inset: 3px;
-  border: 1px solid rgba(232,180,160,0.3);
-  border-radius: 2px;
-  pointer-events: none;
-}
-
-/* SMALL DIFF BANNER */
-.small-diff-banner {
-  background: var(--accent);
-  color: #fff;
-  padding: 1rem 2rem;
-  display: flex;
-  align-items: flex-start;
-  gap: 0.75rem;
-  font-size: clamp(0.88rem, 2vw, 1rem);
-  line-height: 1.6;
-}
-.small-diff-banner strong { font-weight: 500; }
-.sd-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 2px; }
-
-/* FOOTER */
-footer {
-  text-align: center;
-  padding: 2rem 1rem;
-  font-size: 12px;
-  color: var(--ink3);
-  border-top: 1px solid var(--border);
-  margin-top: 3rem;
-}
-footer a { color: var(--ink3); }
-
-/* RESPONSIVE CHART HEIGHTS */
-.h-240 { height: 240px; }
-.h-200 { height: 200px; }
-@media (max-width: 480px) {
-  .h-240 { height: 200px; }
-  .h-200 { height: 170px; }
-  .chart-section { padding: 1rem; }
-  main { padding: 1.5rem 1rem 3rem; }
-  .controls-card { padding: 1.25rem; }
-  .explainer { padding: 1.25rem; }
-}
diff --git a/public/arv/style.css b/public/style.css
similarity index 100%
rename from public/arv/style.css
rename to public/style.css
