Set up book project: Markdown→CSS→PDF pipeline for KDP

Adds the full authoring and build toolchain for "Das Kaleidoskop der
Schlummerwelten" — all 12 story content files in Markdown, Nunjucks
HTML templates, CSS print layout, and Puppeteer-based PDF generation
targeting Amazon KDP (8.5×8.5 in, 0.125in bleed).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

styles/typography.css

@@ -0,0 +1,97 @@
+/* ── Base typography ── */
+body {
+  font-family: Georgia, 'Times New Roman', serif;
+  -webkit-print-color-adjust: exact;
+  print-color-adjust: exact;
+}
+
+/* ── Title page ── */
+.title-eyebrow {
+  font-size: 0.85rem;
+  letter-spacing: 0.2em;
+  text-transform: uppercase;
+  color: rgba(255,255,255,0.6);
+  margin-bottom: 1.5rem;
+}
+
+.title-main {
+  font-size: 3rem;
+  line-height: 1.2;
+  color: white;
+  margin-bottom: 1.5rem;
+  font-style: italic;
+}
+
+.title-sub {
+  font-size: 1.1rem;
+  color: rgba(255,255,255,0.8);
+  letter-spacing: 0.05em;
+}
+
+/* ── Table of contents ── */
+.toc-title {
+  font-size: 1.6rem;
+  color: #1a1a3e;
+  font-style: italic;
+  border-bottom: 1px solid #ddd;
+  padding-bottom: 0.5rem;
+}
+
+/* ── Story title (first scene right page) ── */
+.story-title {
+  font-size: 1.6rem;
+  color: var(--color-primary);
+  font-style: italic;
+  line-height: 1.3;
+  border-bottom: 2px solid var(--color-secondary);
+  padding-bottom: 0.5rem;
+  margin-bottom: 0.5rem;
+}
+
+/* ── Scene text ── */
+.scene-text {
+  font-size: 1.05rem;
+  line-height: 1.85;
+  color: var(--color-text, #1a1a2e);
+}
+
+.scene-text p {
+  margin-bottom: 1em;
+}
+
+.scene-text p:last-child {
+  margin-bottom: 0;
+}
+
+.scene-text em {
+  font-style: italic;
+}
+
+/* Story 9 has dark background — invert text page */
+[data-story="9"].page--text {
+  background: #0a0a2a;
+}
+
+[data-story="9"] .scene-text,
+[data-story="9"] .story-title {
+  color: #ffffff;
+}
+
+[data-story="9"] .story-title {
+  border-color: #ff1493;
+}
+
+/* ── Finale ── */
+.finale-overlay h2 {
+  font-size: 2.5rem;
+  color: white;
+  font-style: italic;
+  text-shadow: 0 2px 12px rgba(0,0,0,0.6);
+}
+
+.finale-overlay p {
+  font-size: 1rem;
+  color: rgba(255,255,255,0.8);
+  letter-spacing: 0.1em;
+  margin-top: 0.5rem;
+}