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/layout.css

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+/* ── Image pages ── */
+.page--image {
+  background: var(--color-primary, #1a1a2e);
+}
+
+.scene-image {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+  display: block;
+}
+
+/* Placeholder when image not yet available */
+.placeholder-image {
+  width: 100%;
+  height: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  opacity: 0.8;
+}
+
+.placeholder-label {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 0.5rem;
+  color: rgba(255,255,255,0.9);
+  text-align: center;
+  padding: 2rem;
+  border: 2px dashed rgba(255,255,255,0.4);
+  border-radius: 12px;
+}
+
+.placeholder-story {
+  font-size: 0.9rem;
+  text-transform: uppercase;
+  letter-spacing: 0.1em;
+  opacity: 0.7;
+}
+
+.placeholder-scene {
+  font-size: 1.4rem;
+  font-weight: 600;
+}
+
+/* ── Text pages ── */
+.page--text {
+  background: var(--color-bg, #fafafa);
+  display: flex;
+  align-items: center;
+}
+
+.text-page-inner {
+  width: 100%;
+  display: flex;
+  flex-direction: column;
+  gap: 1.2rem;
+}
+
+.scene-ornament {
+  font-size: 1.5rem;
+  color: var(--color-secondary, #ccc);
+  text-align: center;
+  margin-top: auto;
+}
+
+/* ── Front matter pages ── */
+.page--title {
+  background: #1a1a3e;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  text-align: center;
+}
+
+.page--imprint {
+  background: #fafafa;
+  display: flex;
+  align-items: flex-end;
+}
+
+.imprint-content {
+  width: 100%;
+  font-size: 0.75rem;
+  color: #666;
+  line-height: 1.8;
+}
+
+/* ── Table of contents ── */
+.page--toc {
+  background: #fafafa;
+  display: flex;
+  flex-direction: column;
+  gap: 2rem;
+}
+
+.toc-list {
+  list-style: none;
+  counter-reset: toc;
+  display: flex;
+  flex-direction: column;
+  gap: 0.8rem;
+}
+
+.toc-list li {
+  counter-increment: toc;
+  display: flex;
+  align-items: baseline;
+  gap: 0.75rem;
+  font-size: 1rem;
+  color: #2a2a4a;
+}
+
+.toc-list li::before {
+  content: counter(toc, decimal-leading-zero);
+  font-size: 0.8rem;
+  color: #aaa;
+  min-width: 2rem;
+}
+
+/* ── Finale page ── */
+.page--finale {
+  background: #1a1a2e;
+  position: relative;
+}
+
+.finale-image {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+}
+
+.finale-overlay {
+  position: absolute;
+  inset: 0;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: flex-end;
+  padding-bottom: 1in;
+  color: white;
+  text-align: center;
+  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 60%);
+}

styles/print.css

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+/* KDP: 8.5×8.5 in trim, 0.125in bleed on all sides */
+@page {
+  size: 8.75in 8.75in;
+  margin: 0;
+}
+
+* {
+  box-sizing: border-box;
+  margin: 0;
+  padding: 0;
+}
+
+html, body {
+  width: 8.75in;
+  background: white;
+}
+
+.page {
+  width: 8.75in;
+  height: 8.75in;
+  position: relative;
+  overflow: hidden;
+  page-break-after: always;
+  break-after: page;
+}
+
+/* Safe zone: content that must not be cut stays 0.25in from bleed edge */
+.page--text .text-page-inner,
+.page--title .title-content,
+.page--toc,
+.page--imprint .imprint-content {
+  /* 0.125in bleed + 0.25in safety margin = 0.375in from PDF edge */
+  padding: 0.75in;
+}

styles/typography.css

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+/* ── 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;
+}