/* ═══════════════════════════════════════════════════════════
   BLOG NOTEBOOK — POC layer (scoped to .zt-reading--notebook)
   Adds handwriting/typewriter chrome over the existing reading room.
   Light = cream paper. Dark = midnight notebook.

   🌱 DESIGN PRINCIPLE — "handwritten over emoji"
   Whenever a UI signal (yes/no, tip, warning, status, callout) could
   be expressed as either an emoji/pictograph OR a handwritten/typewriter
   element — choose the handwritten one. The notebook's voice IS the
   pen + the typewriter; emoji is the lazy default.

   Allowed exceptions (don't touch):
   - 📎 paperclip on blockquotes (Sush is a Clippy fan)
   - Mermaid diagrams (kept fully static, untouched)

   Unicode arrows / typewriter symbols (↗ ← ↳ → ▸ ✓ −) are NOT emoji,
   they are typeset characters and are encouraged.
   ═══════════════════════════════════════════════════════════ */

.zt-reading--notebook {
  /* Notebook palette — light mode */
  --paper:        #F4EFE3;
  --paper-deep:   #ECE4D2;
  --grid-line:    rgba(184, 174, 146, 0.22);
  --ink:          #1B2A4A;
  --ink-soft:     #3A4762;
  --ink-faint:    #6E7892;
  --pen:          #B83230;
  --pen-soft:     #D4574F;
  --ink-green:    #2D7A4F;
  --hi:           #F3D88A;
  --rule:         #B8AE92;
  --sticker-yel:  #FBE89F;
  --sticker-blu:  #C8D9F0;
  --sticker-grn:  #C4DFA9;

  /* Override inherited reading tokens for this layout */
  --reading-font-size: 17px;
}

[data-theme="dark"] .zt-reading--notebook {
  --paper:        #14182A;
  --paper-deep:   #0F1320;
  --grid-line:    rgba(110, 120, 146, 0.14);
  --ink:          #E8E2D2;
  --ink-soft:     #C4BFB0;
  --ink-faint:    #8E8678;
  --pen:          #FF7B6E;
  --pen-soft:     #FF9A90;
  --ink-green:    #6BCC8E;
  --hi:           rgba(243, 216, 138, 0.32);
  --rule:         #2A3148;
  --sticker-yel:  #4A4220;
  --sticker-blu:  #283042;
  --sticker-grn:  #2A3A28;
}

/* ── Page surface — paper + faint graph grid ── */
.zt-reading--notebook .nb-page {
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
  background-attachment: local;
  color: var(--ink);
  padding: 56px 64px 96px;
  border-radius: 0;
  position: relative;
  overflow: visible;
}

/* The sidebars stay zen — only content surface gets paper */
.zt-reading--notebook .zt-sidebar,
.zt-reading--notebook .zt-companion {
  /* leave defaults */
}

/* ── Masthead ── */
.zt-reading--notebook .nb-masthead {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 12px;
  margin-bottom: 32px;
  gap: 24px;
  flex-wrap: wrap;
}
.zt-reading--notebook .nb-brand {
  font-family: 'Caveat', cursive;
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0.005em;
  color: var(--ink);
}
.zt-reading--notebook .nb-strike {
  text-decoration: line-through;
  text-decoration-color: var(--pen);
  text-decoration-thickness: 2px;
  color: var(--ink-faint);
  margin-right: 6px;
}
.zt-reading--notebook .nb-meta-line {
  font-family: 'Special Elite', monospace;
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── Toolbar slot inside masthead — Sush 2026-06-03 ── */
.zt-reading--notebook .nb-toolbar-slot {
  margin: 0;
  flex: 0 0 auto;
}
.zt-reading--notebook .nb-toolbar-slot .zt-reading-toolbar {
  margin: 0;
  padding: 0;
  border: none;
  background: transparent;
  gap: 6px;
}
.zt-reading--notebook .nb-toolbar-slot .zt-reading-toolbar button {
  font-size: 11px;
}
@media (max-width: 640px) {
  .zt-reading--notebook .nb-toolbar-slot {
    order: 3;
    width: 100%;
  }
}

/* ── Stamp (DRAFT / UPDATED) ── */
.zt-reading--notebook .nb-stamp {
  display: inline-block;
  border: 2px solid var(--pen);
  color: var(--pen);
  padding: 4px 12px;
  font-family: 'Special Elite', monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 18px;
  background: rgba(255, 255, 255, 0.4);
  transform: rotate(-2deg);
}
[data-theme="dark"] .zt-reading--notebook .nb-stamp {
  background: rgba(255, 255, 255, 0.04);
}
.zt-reading--notebook .nb-stamp--updated { transform: rotate(1.5deg); }

/* ── H1 with red scribble underline ── */
.zt-reading--notebook .nb-h1 {
  font-family: 'Caveat', cursive;
  font-weight: 700;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.1;
  margin: 8px 0 18px;
  color: var(--ink);
  position: relative;
  letter-spacing: 0.005em;
}
.zt-reading--notebook .nb-h1-underline {
  display: block;
  width: min(280px, 60%);
  height: 4px;
  background: var(--pen);
  margin-top: 6px;
  border-radius: 2px;
  transform: rotate(-0.4deg);
}

/* ── Pen note (red one-liner from Sush under title) ── */
.zt-reading--notebook .nb-pen-note {
  font-family: 'Caveat', cursive;
  font-weight: 600;
  font-size: 22px;
  color: var(--pen);
  transform: rotate(-0.3deg);
  display: block;
  margin: 0 0 18px;
  line-height: 1.35;
  max-width: 620px;
}
/* No auto-prepended arrow — author chooses ↗ / ← / → / none in the frontmatter text */

/* ── Meta line — typewriter ── */
.zt-reading--notebook .nb-meta {
  font-family: 'Special Elite', monospace;
  font-size: 12px;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
  margin: 0 0 28px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.zt-reading--notebook .nb-meta a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--ink-faint);
  text-underline-offset: 3px;
}
.zt-reading--notebook .nb-meta a:hover { color: var(--pen); text-decoration-color: var(--pen); }
.zt-reading--notebook .nb-meta-sep { opacity: 0.6; }

/* ── Sticker (tag chip) ── */
.zt-reading--notebook .nb-sticker {
  display: inline-block;
  font-family: 'Special Elite', monospace;
  font-size: 10px;
  padding: 3px 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--ink);
  background: var(--sticker-yel);
  color: var(--ink);
  transform: rotate(-1.5deg);
  margin-right: 4px;
}

/* ── Toolbar — neutralised on paper ── */
.zt-reading--notebook .zt-reading-toolbar {
  background: rgba(255, 255, 255, 0.5);
  border: 1px dashed var(--rule);
  border-radius: 0;
  padding: 8px 12px;
}
[data-theme="dark"] .zt-reading--notebook .zt-reading-toolbar {
  background: rgba(255, 255, 255, 0.03);
}
.zt-reading--notebook .zt-toolbar-btn,
.zt-reading--notebook .zt-toolbar-group button {
  background: transparent;
  border: 1px solid var(--ink-faint);
  color: var(--ink-soft);
  font-family: 'Special Elite', monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
}
.zt-reading--notebook .zt-toolbar-btn:hover,
.zt-reading--notebook .zt-toolbar-group button.is-active {
  border-color: var(--pen);
  color: var(--pen);
}

/* ═══════════════════════════════════════════════════════════
   BODY — keep readable Source Sans, add notebook personality
   ═══════════════════════════════════════════════════════════ */
.zt-reading--notebook .nb-body {
  font-family: 'Source Sans 3', system-ui, -apple-system, sans-serif;
  font-size: var(--reading-font-size, 17px);
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 720px;
}

.zt-reading--notebook .nb-body > * {
  position: relative;
}

/* H2/H3 hand styled */
.zt-reading--notebook .nb-body h2 {
  font-family: 'Caveat', cursive;
  font-weight: 700;
  font-size: 38px;
  line-height: 1.1;
  margin: 56px 0 16px;
  color: var(--ink);
  letter-spacing: 0;
  border: 0;
  padding: 0;
  display: inline-block;
  max-width: 100%;
}
.zt-reading--notebook .nb-body h2::after {
  content: "";
  display: block;
  width: 100%;
  height: 3px;
  background: var(--pen);
  margin-top: 4px;
  border-radius: 2px;
  transform: rotate(-0.3deg);
}
.zt-reading--notebook .nb-body h3 {
  font-family: 'Caveat', cursive;
  font-weight: 700;
  font-size: 30px;
  line-height: 1.15;
  margin: 36px 0 12px;
  color: var(--ink);
  letter-spacing: 0;
}
.zt-reading--notebook .nb-body h4 {
  font-family: 'Source Sans 3', sans-serif;
  font-weight: 700;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink);
  margin: 28px 0 10px;
}

.zt-reading--notebook .nb-body p {
  margin: 0 0 18px;
  color: var(--ink-soft);
}
.zt-reading--notebook .nb-body p strong,
.zt-reading--notebook .nb-body li strong {
  color: var(--ink);
  font-weight: 700;
}
.zt-reading--notebook .nb-body em {
  font-style: italic;
  color: var(--ink);
}

.zt-reading--notebook .nb-body a {
  color: var(--pen);
  text-decoration: underline;
  text-decoration-color: var(--pen-soft);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.zt-reading--notebook .nb-body a:hover {
  text-decoration-color: var(--pen);
  text-decoration-thickness: 2px;
}

/* Heading anchor — red ink */
.zt-reading--notebook .nb-body .heading-anchor {
  color: var(--pen);
  font-family: 'Caveat', cursive;
  font-weight: 600;
  font-size: 0.7em;
  margin-left: 8px;
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.15s ease-out;
}
.zt-reading--notebook .nb-body h2:hover .heading-anchor,
.zt-reading--notebook .nb-body h3:hover .heading-anchor,
.zt-reading--notebook .nb-body h4:hover .heading-anchor {
  opacity: 1;
}

/* Lists */
.zt-reading--notebook .nb-body ul,
.zt-reading--notebook .nb-body ol {
  margin: 0 0 18px;
  padding-left: 28px;
}
.zt-reading--notebook .nb-body ul li::marker { color: var(--pen); }
.zt-reading--notebook .nb-body ol li::marker { color: var(--pen); font-family: 'Special Elite', monospace; font-weight: bold; }
.zt-reading--notebook .nb-body li { margin-bottom: 8px; }

/* HR — dashed, like a tear in the page */
.zt-reading--notebook .nb-body hr {
  border: 0;
  border-top: 1px dashed var(--rule);
  margin: 36px 0;
}

/* Blockquotes — paper-clipped sub-card.
   📎 is the ONE allowed emoji in the notebook system —
   Sush is a Clippy fan, and the paperclip carries the "this is pinned to your page" meaning. */
.zt-reading--notebook .nb-body blockquote {
  margin: 24px 0 24px 24px;
  padding: 18px 24px;
  background: var(--paper-deep);
  border: 1px dashed var(--ink-faint);
  border-radius: 0;
  color: var(--ink-soft);
  font-family: 'Source Sans 3', sans-serif;
  font-size: 16px;
  line-height: 1.55;
  position: relative;
}
.zt-reading--notebook .nb-body blockquote::before {
  content: "📎";
  position: absolute;
  left: -22px;
  top: 8px;
  font-size: 22px;
  transform: rotate(-15deg);
}
.zt-reading--notebook .nb-body blockquote p { margin: 0 0 8px; }
.zt-reading--notebook .nb-body blockquote p:last-child { margin-bottom: 0; }

/* Tables — typewriter feel, subtle */
.zt-reading--notebook .nb-body table,
.zt-reading--notebook .zt-table-wrap {
  border: 1px solid var(--rule);
  background: rgba(255, 255, 255, 0.45);
  border-radius: 0;
}
[data-theme="dark"] .zt-reading--notebook .nb-body table,
[data-theme="dark"] .zt-reading--notebook .zt-table-wrap {
  background: rgba(255, 255, 255, 0.02);
}
.zt-reading--notebook .nb-body th {
  background: var(--paper-deep);
  color: var(--ink);
  font-family: 'Special Elite', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: 2px solid var(--ink);
  white-space: normal;
}
.zt-reading--notebook .nb-body td {
  color: var(--ink-soft);
  border-bottom: 1px dashed var(--rule);
  font-size: 15px;
}
.zt-reading--notebook .nb-body tr:last-child td { border-bottom: 0; }
.zt-reading--notebook .nb-body tbody tr:nth-child(even) td {
  background: rgba(0, 0, 0, 0.025);
}

/* Code blocks — exclude .mermaid (Mermaid keeps its original zt-reading.css chrome)
   Note: Hugo's Chroma highlighter wraps code blocks in <div class="highlight"> and applies
   INLINE styles (background-color, color) on the <pre> element — those inline styles win
   normal CSS specificity. We use !important on background/colour/font-size to defeat
   Chroma's inline rules so the notebook theme stays consistent across light + dark.
   Mermaid is excluded via :not(.mermaid). */
.zt-reading--notebook .nb-body pre:not(.mermaid),
.zt-reading--notebook .nb-body .highlight pre {
  background: var(--paper-deep) !important;
  color: var(--ink) !important;
  border: 1px solid var(--rule);
  border-radius: 0;
  padding: 18px 22px;
  overflow-x: auto;
  font-size: 16px !important;
  line-height: 1.55;
}
.zt-reading--notebook .nb-body pre:not(.mermaid) code,
.zt-reading--notebook .nb-body .highlight pre code {
  font-family: 'Special Elite', 'JetBrains Mono', ui-monospace, monospace !important;
  color: var(--ink) !important;
  background: transparent !important;
  font-size: inherit !important;
}
/* Defeat Chroma's per-token inline span colours (Monokai palette) inside the notebook —
   we want pure --ink across the whole block regardless of language token type. */
.zt-reading--notebook .nb-body .highlight pre span {
  color: var(--ink) !important;
  background: transparent !important;
}
/* Make the .highlight wrapper transparent so notebook frame shows through. */
.zt-reading--notebook .nb-body .highlight {
  background: transparent !important;
}
.zt-reading--notebook .nb-body :not(pre) > code {
  font-family: 'Special Elite', monospace;
  font-size: 0.9em;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  padding: 1px 6px;
  border-radius: 0;
  color: var(--pen);
}
.zt-reading--notebook .code-copy-btn {
  background: var(--paper);
  border: 1px solid var(--ink-faint);
  color: var(--ink-soft);
  font-family: 'Special Elite', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 5px 12px;
  cursor: pointer;
  border-radius: 0;
}
.zt-reading--notebook .code-copy-btn.copied { color: var(--pen); border-color: var(--pen); }

/* ═══════════════════════════════════════════════════════════
   SHORTCODES
   ═══════════════════════════════════════════════════════════ */

/* {{< hi >}} highlighter */
.zt-reading--notebook .nb-body .nb-hi {
  background: var(--hi);
  padding: 0 4px;
  color: var(--ink);
  border-radius: 0;
  font-weight: 600;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

/* {{< margin >}} margin note — handwritten aside, always inline.
   We keep it inline at every viewport so it never escapes the content column
   and overlaps the companion sidebar. Visually distinct via Caveat + pen border. */
.zt-reading--notebook .nb-body .nb-margin {
  display: block;
  font-family: 'Caveat', cursive;
  font-weight: 600;
  font-size: 20px;
  color: var(--pen);
  line-height: 1.3;
  transform: rotate(-0.5deg);
  background: rgba(255, 255, 255, 0.6);
  border-left: 3px solid var(--pen);
  padding: 8px 12px 8px 14px;
  margin: 16px 0 16px 8px;
  max-width: 100%;
}
[data-theme="dark"] .zt-reading--notebook .nb-body .nb-margin {
  background: rgba(255, 255, 255, 0.04);
}
.zt-reading--notebook .nb-body .nb-margin::before {
  content: "← ";
  color: var(--pen);
}

/* ═══════════════════════════════════════════════════════════
   FOUNDER NOTE — handwritten closing letter
   ═══════════════════════════════════════════════════════════ */
.zt-reading--notebook .nb-founder-note {
  margin: 64px auto 0;
  background: var(--paper-deep);
  border: 1px dashed var(--ink-faint);
  padding: 32px 36px;
  font-family: 'Caveat', cursive;
  font-weight: 500;
  font-size: 24px;
  line-height: 1.45;
  color: var(--ink);
  transform: rotate(-0.2deg);
  box-shadow: 4px 6px 0 rgba(27, 42, 74, 0.08);
  max-width: 720px;
}
[data-theme="dark"] .zt-reading--notebook .nb-founder-note {
  box-shadow: 4px 6px 0 rgba(0, 0, 0, 0.4);
}
.zt-reading--notebook .nb-founder-note p {
  margin: 0 0 8px;
  font-family: inherit;
}
.zt-reading--notebook .nb-founder-note p:last-of-type { margin-bottom: 0; }
.zt-reading--notebook .nb-founder-note .nb-sig {
  font-family: 'Caveat', cursive;
  font-weight: 700;
  font-size: 30px;
  color: var(--pen);
  margin-top: 14px;
  transform: rotate(-3deg);
  display: inline-block;
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 1023px) {
  .zt-reading--notebook .nb-page { padding: 36px 28px 72px; }
  .zt-reading--notebook .nb-h1 { font-size: 26px; }
  .zt-reading--notebook .nb-body h2 { font-size: 32px; }
  .zt-reading--notebook .nb-body h3 { font-size: 26px; }
  .zt-reading--notebook .nb-founder-note { font-size: 20px; padding: 24px 20px; }
}
@media (max-width: 640px) {
  .zt-reading--notebook .nb-masthead { padding-bottom: 10px; margin-bottom: 24px; }
  .zt-reading--notebook .nb-brand { font-size: 24px; }
  .zt-reading--notebook .nb-h1 { font-size: 22px; }
  .zt-reading--notebook .nb-pen-note { font-size: 19px; }
}

/* Mobile reading mode - hide all pre-title chrome on individual blog posts.
   Sush 2026-06-04: clean Title -> Content read with no distractions.
   Placed OUTSIDE preceding @media block so a parse error there does not eat
   this rule. Selector specificity bumped with .nb-page for safety. */
@media (max-width: 640px) {
  .zt-reading--notebook .nb-page .nb-masthead,
  .zt-reading--notebook .nb-page .nb-meta.nb-meta--top {
    display: none !important;
  }
}

/* ═══════════════════════════════════════════════════════════
   NOTEBOOK — POLISH LAYER
   Carry-over fixes for patterns inherited from zt-reading.css
   that need notebook-specific overrides on cream paper.
   ═══════════════════════════════════════════════════════════ */

/* ── 1. Reading progress bar — pen red, not indigo ── */
.zt-reading--notebook ~ .zt-reading-progress,
body:has(.zt-reading--notebook) .zt-reading-progress {
  background: var(--pen, #B83230);
  height: 3px;
  opacity: 0.85;
}

/* ── 2. Mobile table cards — paper-deep + dashed, not dark indigo ── */
@media (max-width: 640px) {
  .zt-reading--notebook .zt-table-wrap tbody tr,
  .zt-reading--notebook .nb-body > table > tbody > tr {
    background: var(--paper-deep) !important;
    border: 1px dashed var(--rule) !important;
    border-radius: 0 !important;
  }
  .zt-reading--notebook .zt-table-wrap td:first-child,
  .zt-reading--notebook .nb-body > table > tbody > tr > td:first-child {
    color: var(--pen) !important;
    font-family: 'Special Elite', monospace !important;
    font-size: 10px !important;
    letter-spacing: 0.12em !important;
    text-transform: uppercase !important;
    font-weight: 700 !important;
  }
  .zt-reading--notebook .zt-table-wrap td,
  .zt-reading--notebook .nb-body > table > tbody > tr > td {
    color: var(--ink-soft) !important;
  }
}

/* ── 3. Prompt cards — sticker-style ── */
.zt-reading--notebook .nb-body .prompt-cards::before {
  content: 'PROMPT';
  background: var(--sticker-yel);
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 2px 10px;
  font-family: 'Special Elite', monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  display: inline-block;
  transform: rotate(-1.5deg);
  margin-bottom: 8px;
}
.zt-reading--notebook .nb-body .prompt-cards blockquote {
  background: var(--paper-deep);
  border-left: 3px solid var(--pen);
  border-radius: 0;
  color: var(--ink-soft);
}
.zt-reading--notebook .nb-body .prompt-cards blockquote::before { display: none; }
.zt-reading--notebook .nb-body .prompt-cards blockquote p { color: var(--ink-soft); }
.zt-reading--notebook .nb-body .prompt-cards blockquote strong { color: var(--pen); }
.zt-reading--notebook .nb-body .prompt-copy-btn {
  background: var(--paper);
  border: 1px solid var(--ink-faint);
  color: var(--ink-soft);
  font-family: 'Special Elite', monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 0;
}
.zt-reading--notebook .nb-body .prompt-copy-btn:hover { color: var(--pen); border-color: var(--pen); }
.zt-reading--notebook .nb-body .prompt-copy-btn.copied { color: var(--pen); border-color: var(--pen); }

/* ── 4. Cowork scenario blockquotes — paper version ── */
.zt-reading--notebook .nb-body .cowork-scenario blockquote {
  background: var(--paper-deep);
  border-left: 3px solid var(--pen);
  border-radius: 0;
  color: var(--ink-soft);
}

/* ── 5. Figures — Polaroid frame with Caveat caption ── */
.zt-reading--notebook .nb-body figure {
  background: rgba(255, 255, 255, 0.65);
  padding: 12px 12px 8px;
  border: 1px solid var(--rule);
  box-shadow: 4px 6px 0 rgba(27, 42, 74, 0.08);
  margin: 24px auto;
  max-width: 92%;
  transform: rotate(-0.4deg);
}
[data-theme="dark"] .zt-reading--notebook .nb-body figure {
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 4px 6px 0 rgba(0, 0, 0, 0.4);
}
.zt-reading--notebook .nb-body figure img {
  border: 1px solid var(--rule);
  margin: 0 0 10px;
  display: block;
  width: 100%;
  height: auto;
}
.zt-reading--notebook .nb-body figcaption {
  font-family: 'Caveat', cursive;
  font-weight: 600;
  font-size: 19px;
  color: var(--pen);
  text-align: center;
  line-height: 1.3;
  transform: rotate(0.3deg);
}

/* ── 6. Details / summary (FAQ, expandables) — paper feel ── */
.zt-reading--notebook .nb-body details {
  background: var(--paper-deep);
  border: 1px dashed var(--rule);
  border-radius: 0;
  padding: 14px 18px;
  margin: 14px 0;
}
.zt-reading--notebook .nb-body details > summary {
  font-family: 'Source Sans 3', sans-serif;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-left: 22px;
}
.zt-reading--notebook .nb-body details > summary::-webkit-details-marker { display: none; }
.zt-reading--notebook .nb-body details > summary::before {
  content: '▸';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--pen);
  font-family: 'Caveat', cursive;
  font-size: 22px;
  line-height: 1;
  transition: transform 0.15s ease-out;
}
.zt-reading--notebook .nb-body details[open] > summary::before { transform: rotate(90deg); }
.zt-reading--notebook .nb-body details > p,
.zt-reading--notebook .nb-body details > ul,
.zt-reading--notebook .nb-body details > ol {
  margin-top: 12px;
}

/* ── 7. Mermaid diagrams — UNTOUCHED.
       The existing zt-reading.css styling (dark canvas + dot grid) applies as-is.
       Sush wants Mermaid to keep its current look, even inside the notebook layout. */

/* ═══════════════════════════════════════════════════════════
   ACCESSIBILITY + PERFORMANCE
   ═══════════════════════════════════════════════════════════ */

/* Reduce motion — kill rotations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  .zt-reading--notebook .nb-stamp,
  .zt-reading--notebook .nb-h1-underline,
  .zt-reading--notebook .nb-pen-note,
  .zt-reading--notebook .nb-sticker,
  .zt-reading--notebook .nb-body h2::after,
  .zt-reading--notebook .nb-body .nb-margin,
  .zt-reading--notebook .nb-founder-note,
  .zt-reading--notebook .nb-founder-note .nb-sig,
  .zt-reading--notebook .nb-body figure,
  .zt-reading--notebook .nb-body figcaption,
  .zt-reading--notebook .nb-body blockquote::before,
  .zt-reading--notebook .nb-body .prompt-cards::before {
    transform: none !important;
  }
}

/* CLS guard — reserve H1 height before Caveat font loads (it's wider/taller than fallback) */
.zt-reading--notebook .nb-h1 {
  min-height: calc(1.05em);
  font-size-adjust: 0.5;
}

/* Hyphens + word-break for long product/SKU names on narrow viewports */
.zt-reading--notebook .nb-body p,
.zt-reading--notebook .nb-body li {
  hyphens: auto;
  overflow-wrap: anywhere;
  word-break: normal;
}

/* External link ↗ icon — Caveat after external links */
.zt-reading--notebook .nb-body a[href^="http"]:not([href*="aguidetocloud.com"]):not([href*="localhost"])::after {
  content: ' ↗';
  font-family: 'Caveat', cursive;
  font-size: 0.95em;
  color: var(--pen-soft);
  margin-left: 1px;
}

/* <kbd> — typewriter keys for keyboard shortcuts */
.zt-reading--notebook .nb-body kbd {
  font-family: 'Special Elite', monospace;
  font-size: 0.85em;
  background: var(--paper);
  border: 1px solid var(--ink-faint);
  border-bottom-width: 2px;
  padding: 1px 6px 0;
  border-radius: 3px;
  color: var(--ink);
  box-shadow: 1px 1px 0 var(--ink-faint);
  white-space: nowrap;
}

/* Ensure :focus-visible is obvious on paper */
.zt-reading--notebook a:focus-visible,
.zt-reading--notebook button:focus-visible {
  outline: 2px dashed var(--pen);
  outline-offset: 3px;
}

/* Selection colour — yellow highlighter */
.zt-reading--notebook .nb-body ::selection {
  background: var(--hi);
  color: var(--ink);
}

/* ═══════════════════════════════════════════════════════════
   MERMAID — keep static, no theme inheritance leak
   The base zt-reading.css mermaid block forces a dark canvas
   regardless of theme. In light mode, the notebook's --ink-soft
   would inherit into mermaid SVG text and make it invisible.
   This rule stops the inheritance.
   ═══════════════════════════════════════════════════════════ */
.zt-reading--notebook .nb-body .mermaid,
.zt-reading--notebook .nb-body .mermaid * {
  color: #E2E8F0;
}

/* ═══════════════════════════════════════════════════════════
   QUIET MARKS — replace ✅ / ❌ emoji with handwritten ticks
   Injected by zt-reading-enhance.js DOM walker on notebook layouts.
   ✅ ✔ → ✓ (slim tick, ink-green)
   ❌ ✗ → − (em-dash, pen-red)
   ═══════════════════════════════════════════════════════════ */
.zt-reading--notebook .nb-body .nb-mark {
  display: inline-block;
  width: 1.1em;
  font-family: 'Caveat', 'Source Sans 3', sans-serif;
  font-size: 1.15em;
  line-height: 1;
  text-align: center;
  vertical-align: -2px;
  font-style: normal;
  font-weight: 700;
}
.zt-reading--notebook .nb-body .nb-mark--yes {
  color: var(--ink-green);
  font-size: 1.25em;
  vertical-align: -3px;
}
.zt-reading--notebook .nb-body .nb-mark--no {
  color: var(--pen);
  font-weight: 700;
  letter-spacing: -0.05em;
}

/* In tables, center the marks within their cell */
.zt-reading--notebook .nb-body td .nb-mark,
.zt-reading--notebook .nb-body th .nb-mark {
  display: block;
  text-align: center;
  width: auto;
}


/* ═══════════════════════════════════════════════════════════
   FAQ — auto-rendered from frontmatter `faq:` block.
   Schema (FAQPage JSON-LD) is generated in seo-jsonld.html for ALL blogs;
   this section adds the VISIBLE reader Q&A. Opt out per-page with
   `faq_render: false`. Section lives BETWEEN body and founder note,
   so it's scoped under .zt-reading--notebook (NOT .nb-body) and must
   restate width + heading-anchor styles that .nb-body owns.
   ═══════════════════════════════════════════════════════════ */

.zt-reading--notebook .nb-faq {
  max-width: 720px;
  margin: 64px auto 0;
  padding-top: 28px;
  border-top: 1px dashed var(--rule);
}

.zt-reading--notebook .nb-faq-heading {
  font-family: 'Caveat', cursive;
  font-weight: 700;
  font-size: 38px;
  line-height: 1.1;
  margin: 0 0 24px;
  color: var(--ink);
  letter-spacing: 0;
}

.zt-reading--notebook .nb-faq-intro {
  font-family: 'Source Sans 3', system-ui, -apple-system, sans-serif;
  font-size: var(--reading-font-size, 17px);
  line-height: 1.6;
  color: var(--ink-soft);
  font-style: italic;
  margin: -8px 0 20px;
}

.zt-reading--notebook .nb-faq-item {
  padding: 18px 0 22px;
  border-bottom: 1px dashed var(--rule);
}
.zt-reading--notebook .nb-faq-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.zt-reading--notebook .nb-faq-q {
  font-family: 'Source Sans 3', system-ui, -apple-system, sans-serif;
  font-weight: 700;
  font-size: 19px;
  line-height: 1.35;
  margin: 0 0 10px;
  color: var(--ink);
  letter-spacing: 0;
  position: relative;
}
.zt-reading--notebook .nb-faq-q .nb-faq-q-text {
  /* keeps anchor link from being underlined by question hover */
  display: inline;
}

.zt-reading--notebook .nb-faq-a {
  font-family: 'Source Sans 3', system-ui, -apple-system, sans-serif;
  font-size: var(--reading-font-size, 17px);
  line-height: 1.7;
  color: var(--ink-soft);
}
.zt-reading--notebook .nb-faq-a > *:first-child { margin-top: 0; }
.zt-reading--notebook .nb-faq-a > *:last-child { margin-bottom: 0; }
.zt-reading--notebook .nb-faq-a p {
  margin: 0 0 12px;
}
/* FAQ content lives outside .nb-body so it doesn't inherit body's wrap rule */
.zt-reading--notebook .nb-faq-a p,
.zt-reading--notebook .nb-faq-a li,
.zt-reading--notebook .nb-faq-a a,
.zt-reading--notebook .nb-faq-a code {
  hyphens: auto;
  overflow-wrap: anywhere;
  word-break: normal;
}
.zt-reading--notebook .nb-faq-a a {
  color: var(--pen);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
.zt-reading--notebook .nb-faq-a a:hover {
  color: var(--pen-soft);
}
.zt-reading--notebook .nb-faq-a code {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;
  font-size: 0.9em;
  background: var(--paper-deep);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--ink);
}
.zt-reading--notebook .nb-faq-a ul,
.zt-reading--notebook .nb-faq-a ol {
  margin: 8px 0 12px;
  padding-left: 24px;
}
.zt-reading--notebook .nb-faq-a li {
  margin-bottom: 4px;
}

/* Heading anchor — same hover-reveal pattern as .nb-body but scoped to FAQ */
.zt-reading--notebook .nb-faq .heading-anchor {
  color: var(--pen);
  font-family: 'Caveat', cursive;
  font-weight: 600;
  font-size: 0.75em;
  margin-left: 8px;
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.15s ease-out;
}
.zt-reading--notebook .nb-faq-q:hover .heading-anchor,
.zt-reading--notebook .nb-faq-q:focus-within .heading-anchor {
  opacity: 1;
}

/* Mobile — keep readable, tighten margins */
@media (max-width: 768px) {
  .zt-reading--notebook .nb-faq { margin-top: 48px; }
  .zt-reading--notebook .nb-faq-heading { font-size: 32px; }
  .zt-reading--notebook .nb-faq-q { font-size: 18px; }
}
@media (max-width: 640px) {
  .zt-reading--notebook .nb-faq-heading { font-size: 28px; margin-bottom: 18px; }
  .zt-reading--notebook .nb-faq-item { padding: 16px 0 18px; }
}