diff --git a/playme/default-theme.css b/playme/default-theme.css
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+/*
+ * PLAYME Dark Theme — Default CSS for Marp presentations
+ *
+ * This file is referenced by PLAYME.md via inline style block.
+ * Edit this to customise colours, fonts, spacing, etc.
+ * Then regenerate: marp PLAYME.md -o PLAYME.html --allow-local-files
+ */
+
+/* ── Colour palette ── */
+:root {
+  --color-bg: #0b0d17;
+  --color-bg-card: #151827;
+  --color-accent: #6c63ff;
+  --color-accent2: #00d4aa;
+  --color-text: #e8eaf6;
+  --color-muted: #8892b0;
+}
+
+/* ── Base slide ── */
+section {
+  background: linear-gradient(135deg, #0b0d17 0%, #151827 50%, #1a1040 100%);
+  color: var(--color-text);
+  font-family: 'Inter', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
+  font-size: 28px;
+  letter-spacing: -0.01em;
+  padding: 60px 80px;
+}
+
+/* ── Page number styling ── */
+section::after {
+  background: linear-gradient(90deg, var(--color-accent), var(--color-accent2));
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  font-weight: 600;
+  font-size: 18px;
+}
+
+/* ── Headings ── */
+h1 {
+  background: linear-gradient(135deg, #ffffff 0%, #c7d2fe 100%);
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  font-weight: 800;
+  font-size: 2.8em;
+  line-height: 1.1;
+  margin-bottom: 0.3em;
+}
+
+h2 {
+  background: linear-gradient(90deg, var(--color-accent), var(--color-accent2));
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  font-weight: 700;
+  font-size: 2em;
+  margin-bottom: 0.6em;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+}
+
+h3 {
+  color: var(--color-muted);
+  font-weight: 300;
+  font-size: 1.3em;
+  margin-top: 0;
+}
+
+/* ── Lists — styled as card rows ── */
+ul {
+  list-style: none;
+  padding: 0;
+  margin: 0;
+}
+
+li {
+  padding: 14px 24px;
+  margin: 10px 0;
+  background: rgba(108, 99, 255, 0.08);
+  border-left: 3px solid var(--color-accent);
+  border-radius: 0 12px 12px 0;
+  font-size: 0.95em;
+  color: var(--color-text);
+}
+
+li strong {
+  color: var(--color-accent2);
+}
+
+/* ── Emphasis ── */
+em {
+  color: var(--color-muted);
+  font-style: normal;
+}
+
+/* ── Blockquotes — callout style ── */
+blockquote {
+  border-left: 4px solid var(--color-accent2);
+  background: rgba(0, 212, 170, 0.06);
+  padding: 16px 24px;
+  border-radius: 0 12px 12px 0;
+  margin: 20px 0;
+  color: var(--color-text);
+}
+
+/* ── Code blocks ── */
+pre {
+  background: rgba(0, 0, 0, 0.4);
+  border: 1px solid rgba(108, 99, 255, 0.2);
+  border-radius: 12px;
+  padding: 20px;
+}
+
+code {
+  color: var(--color-accent2);
+  font-size: 0.85em;
+}
+
+/* ── Tables ── */
+table {
+  border-collapse: collapse;
+  width: 100%;
+  margin: 16px 0;
+}
+
+th {
+  background: rgba(108, 99, 255, 0.15);
+  color: var(--color-accent2);
+  font-weight: 600;
+  text-transform: uppercase;
+  font-size: 0.8em;
+  letter-spacing: 0.05em;
+  padding: 12px 16px;
+  text-align: left;
+}
+
+td {
+  padding: 10px 16px;
+  border-bottom: 1px solid rgba(108, 99, 255, 0.1);
+  color: var(--color-text);
+}
+
+/* ── Images — fit within slides ── */
+img {
+  max-height: 70%;
+  border-radius: 12px;
+  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
+}
+
+/* ══════════════════════════════════
+   SPECIAL SLIDE CLASSES
+   Use with <!-- _class: classname -->
+   ══════════════════════════════════ */
+
+/* ── Title slide ── */
+section.title-slide {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+  text-align: center;
+  background: radial-gradient(ellipse at 30% 50%, #1a1060 0%, #0b0d17 60%),
+              linear-gradient(135deg, #0b0d17, #151827);
+}
+
+section.title-slide::before {
+  content: '';
+  position: absolute;
+  top: -50%;
+  left: -50%;
+  width: 200%;
+  height: 200%;
+  background: radial-gradient(circle at 70% 30%, rgba(108, 99, 255, 0.15) 0%, transparent 50%),
+              radial-gradient(circle at 30% 70%, rgba(0, 212, 170, 0.1) 0%, transparent 50%);
+  z-index: 0;
+}
+
+section.title-slide h1 {
+  font-size: 3.5em;
+  z-index: 1;
+}
+
+section.title-slide h3 {
+  font-size: 1.4em;
+  z-index: 1;
+}
+
+section.title-slide p {
+  color: var(--color-muted);
+  font-size: 0.9em;
+  z-index: 1;
+}
+
+/* ── End / closing slide ── */
+section.end-slide {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+  text-align: center;
+  background: radial-gradient(ellipse at 50% 50%, #1a1060 0%, #0b0d17 70%);
+}
+
+section.end-slide h1 {
+  font-size: 3em;
+  background: linear-gradient(90deg, var(--color-accent), var(--color-accent2));
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+}
+
+section.end-slide p {
+  color: var(--color-muted);
+  font-size: 1.1em;
+}
+
+/* ── Section divider slide ── */
+section.divider {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+  text-align: center;
+  background: linear-gradient(135deg, #0b0d17 0%, #1a1060 100%);
+}
+
+section.divider h2 {
+  font-size: 2.5em;
+}
+
+/* ── Image showcase slide ── */
+section.showcase {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+  text-align: center;
+}
+
+section.showcase img {
+  max-height: 60%;
+  margin: 20px 0;
+}