/* ============================================================
   A WORKING BOOK — an original "bound book" portfolio
   A beautifully typeset art-book open on a dark pine desk.
   Namespace: --bk-* / .bk-*
   Fonts loaded via <link> in the HTML head:
     Playfair Display · Spectral · Caveat · Spline Sans Mono
   ============================================================ */

:root {
  /* ---- surface / desk ---- */
  --bk-desk:        #2A1712;   /* deep warm desk */
  --bk-desk-2:      #170C09;   /* vignette edge */

  /* ---- paper ---- */
  --bk-paper:       #F4ECDA;   /* warm cream page */
  --bk-paper-2:     #EEE4CE;   /* facing page (subtle aged shift) */
  --bk-paper-edge:  #E2D5B6;   /* stacked page edges */
  --bk-paper-deep:  #E7DBC0;   /* insets / blocks */

  /* ---- ink ---- */
  --bk-ink:         #2C2620;   /* espresso text */
  --bk-ink-soft:    #6A6052;   /* secondary */
  --bk-ink-faint:   #998D78;   /* tertiary / meta */

  /* ---- accents (tweakable: --bk-ember is primary) ---- */
  --bk-ember:       #C0512B;   /* terracotta — PRIMARY accent */
  --bk-ember-deep:  #97391A;
  --bk-pine:        #2F5D52;   /* binding cloth / secondary */
  --bk-ochre:       #CE9230;   /* highlight / tertiary */
  --bk-ribbon:      #A8392B;   /* bookmark ribbon */

  /* ---- lines & shadow ---- */
  --bk-rule:        rgba(44,38,32,0.10);
  --bk-gutter:      rgba(34,28,22,0.30);
  --bk-marker:      rgba(206,146,48,0.40);

  /* ---- type ---- */
  --bk-display: 'Playfair Display', Georgia, serif;
  --bk-serif:   'Spectral', Georgia, serif;
  --bk-hand:    'Caveat', 'Segoe Script', cursive;
  --bk-mono:    'Spline Sans Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* ---- geometry ---- */
  --bk-pad: 54px;          /* page padding (density tweak) */
  --bk-ease: cubic-bezier(0.22, 0.61, 0.30, 1);
  --bk-flip: cubic-bezier(0.45, 0.05, 0.30, 1);
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background:
    radial-gradient(120% 90% at 50% 38%, var(--bk-desk) 0%, var(--bk-desk-2) 100%);
  font-family: var(--bk-serif);
  color: var(--bk-ink);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
.bk-stage {
  position: fixed; inset: 0;
  display: grid; place-items: center;
}
/* faint desk grain */
.bk-stage::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    repeating-linear-gradient(94deg, rgba(255,255,255,0.014) 0 2px, transparent 2px 7px),
    radial-gradient(80% 60% at 50% 50%, transparent 60%, rgba(0,0,0,0.34) 100%);
}

/* ============================================================
   BOOK FRAME
   ============================================================ */
.bk-book {
  position: relative;
  transform-origin: center center;
  filter: drop-shadow(0 42px 60px rgba(0,0,0,0.45));
}
.bk-spread {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bk-paper);
  border-radius: 5px;
}
/* stacked page-edge thickness (grows on the read side) */
.bk-book::before,
.bk-book::after {
  content: ""; position: absolute; top: 6px; bottom: 6px; width: 16px;
  background:
    repeating-linear-gradient(90deg, var(--bk-paper-edge) 0 1px, rgba(0,0,0,0.05) 1px 2px, var(--bk-paper-edge) 2px 3px);
  z-index: -1;
}
.bk-book::before { left: -14px;  border-radius: 4px 0 0 4px; box-shadow: inset 2px 0 4px rgba(0,0,0,0.12); }
.bk-book::after  { right: -14px; border-radius: 0 4px 4px 0; box-shadow: inset -2px 0 4px rgba(0,0,0,0.12); }

/* the binding / spine gutter */
.bk-spread::after {
  content: ""; position: absolute; top: 0; bottom: 0; left: 50%; width: 64px;
  transform: translateX(-50%); pointer-events: none; z-index: 4;
  background: linear-gradient(90deg,
     rgba(34,28,22,0) 0%, rgba(34,28,22,0.05) 30%,
     var(--bk-gutter) 49%, rgba(34,28,22,0.34) 50%,
     var(--bk-gutter) 51%, rgba(34,28,22,0.05) 70%, rgba(34,28,22,0) 100%);
}
.bk-ribbon {
  position: absolute; top: -6px; left: calc(50% + 8px); right: auto; width: 24px; height: 150px;
  background: linear-gradient(180deg, var(--bk-ribbon), #8d2c20);
  z-index: 6; box-shadow: 0 4px 8px rgba(0,0,0,0.25);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 84%, 0 100%);
}

/* ============================================================
   THUMB-INDEX TABS — color-coded section tabs on the page edge.
   Ported from monograph.css §7, recolored to coral. Anchored to
   the right edge of the relatively-positioned .bk-book. Each tab
   carries its section color via --tab; the active one fills.
   FRONT / WORK / GUIDE / END → front matter · Selected Work ·
   Field Guide · end matter (Contact).
   ============================================================ */
.bk-thumbtabs { position: absolute; top: 84px; right: -28px; display: flex; flex-direction: column; gap: 7px; z-index: 5; }
.bk-tab {
  --tab: var(--bk-ember);
  width: 28px; min-height: 84px; padding: 12px 0; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  writing-mode: vertical-rl; text-orientation: mixed;
  font-family: var(--bk-mono); font-size: 9.5px; letter-spacing: 0.2em; text-transform: uppercase;
  background: var(--bk-paper-edge); color: var(--bk-ink-soft);
  border-radius: 0 7px 7px 0; border-left: 4px solid var(--tab);
  box-shadow: 3px 3px 6px rgba(0,0,0,0.16);
  border-top: none; border-right: none; border-bottom: none;
  transition: width var(--bk-ease), background var(--bk-ease), color var(--bk-ease);
}
.bk-tab:hover { width: 34px; }
.bk-tab.on { width: 38px; background: var(--tab); color: #F7F0E1; border-left-color: var(--tab); }
/* hide the thumb-index on mobile, where the book uses its flat fallback */
@media (max-width: 1024px) { .bk-thumbtabs { display: none; } }

/* ============================================================
   PAGE
   ============================================================ */
.bk-page {
  position: relative;
  padding: var(--bk-pad);
  min-width: 0;
  display: flex; flex-direction: column;
  overflow: hidden; /* fixed-page guard: content can never spill past / stretch the 880px page */
}
.bk-page--l { background: var(--bk-paper-2); border-radius: 5px 0 0 5px; }
.bk-page--r { background: var(--bk-paper); border-radius: 0 5px 5px 0; }
/* inner-margin shading toward the spine */
.bk-page--l::before, .bk-page--r::before {
  content: ""; position: absolute; top: 0; bottom: 0; width: 46px; pointer-events: none;
}
.bk-page--l::before { right: 0; background: linear-gradient(90deg, transparent, rgba(34,28,22,0.07)); }
.bk-page--r::before { left: 0;  background: linear-gradient(270deg, transparent, rgba(34,28,22,0.07)); }

/* running head + folio */
.bk-runhead {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--bk-mono); font-size: 10.5px; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--bk-ink-faint);
  padding-bottom: 14px; margin-bottom: 22px; border-bottom: 1px solid var(--bk-rule);
}
.bk-folio {
  position: absolute; bottom: 22px; font-family: var(--bk-mono);
  font-size: 11px; letter-spacing: 0.12em; color: var(--bk-ink-faint);
}
.bk-page--l .bk-folio { left: var(--bk-pad); }
.bk-page--r .bk-folio { right: var(--bk-pad); }

/* page-corner turn affordance */
.bk-corner {
  position: absolute; bottom: 0; width: 64px; height: 64px; cursor: pointer; z-index: 7;
  transition: background var(--bk-ease);
}
.bk-corner--next { right: 0; }
.bk-corner--prev { left: 0; }
.bk-corner::after {
  content: ""; position: absolute; bottom: 0; width: 0; height: 0;
  transition: border-width 220ms var(--bk-ease), box-shadow 220ms var(--bk-ease);
}
.bk-corner--next::after { right: 0; border-bottom: 0 solid rgba(0,0,0,0.18); border-left: 0 solid transparent; }
.bk-corner--next:hover::after { border-bottom: 38px solid rgba(192,81,43,0.16); border-left: 38px solid transparent; }
.bk-corner--prev::after { left: 0; border-bottom: 0 solid rgba(0,0,0,0.18); border-right: 0 solid transparent; }
.bk-corner--prev:hover::after { border-bottom: 38px solid rgba(192,81,43,0.16); border-right: 38px solid transparent; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
.bk-kicker {
  font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.26em;
  text-transform: uppercase; color: var(--bk-ember); font-weight: 500;
}
.bk-chno {
  display: block; margin-top: 7px;
  font-family: var(--bk-display); font-size: 19px; font-style: italic;
  color: var(--bk-ink-faint); letter-spacing: 0.02em;
}
.bk-title {
  font-family: var(--bk-display); font-weight: 400; line-height: 0.98;
  letter-spacing: -0.005em; color: var(--bk-ink); margin: 0;
}
.bk-title--xl { font-size: clamp(54px, 7vw, 92px); }
.bk-title--l  { font-size: 56px; }
.bk-title--m  { font-size: 38px; }
.bk-serifhead { font-family: var(--bk-serif); font-weight: 600; font-size: 21px; line-height: 1.2; color: var(--bk-ink); margin: 0; }
.bk-lede {
  font-family: var(--bk-serif); font-weight: 400; font-size: 18px; line-height: 1.62;
  color: var(--bk-ink-soft); margin: 0; text-wrap: pretty;
}
.bk-body { font-family: var(--bk-serif); font-weight: 400; font-size: 15.5px; line-height: 1.66; color: var(--bk-ink-soft); margin: 0; text-wrap: pretty; }
.bk-drop::first-letter {
  font-family: var(--bk-display); float: left; font-size: 76px; line-height: 0.66;
  padding: 8px 12px 0 0; color: var(--bk-ember);
}
.bk-em { color: var(--bk-ember-deep); font-style: italic; text-decoration: none; }
.bk-mark { background: linear-gradient(180deg, transparent 58%, var(--bk-marker) 58% 92%, transparent 92%); padding: 0 2px; }
.bk-note {
  font-family: var(--bk-hand); font-size: 22px; line-height: 1.15; color: var(--bk-ember-deep);
  transform: rotate(-3deg); transform-origin: left top;
}
.bk-note--r { transform: rotate(2.5deg); }

/* ============================================================
   COVER (spread 0 — closed book)
   ============================================================ */
.bk-cover {
  width: 620px; height: 880px; border-radius: 6px 10px 10px 6px; position: relative;
  background:
    radial-gradient(140% 120% at 12% 8%, rgba(255,255,255,0.06), transparent 45%),
    linear-gradient(150deg, #CE6A4E 0%, var(--bk-ember) 55%, #8E3320 100%);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.06);
  padding: 64px 60px 104px;
  display: flex; flex-direction: column;
  color: #F4ECDA;
  overflow: hidden;
}
.bk-cover::before { /* spine band */
  content: ""; position: absolute; top: 0; bottom: 0; left: 0; width: 26px;
  background: linear-gradient(90deg, rgba(0,0,0,0.30), rgba(0,0,0,0));
}
.bk-cover::after { /* embossed frame */
  content: ""; position: absolute; inset: 28px; border: 1.5px solid rgba(244,236,218,0.28); border-radius: 3px;
  pointer-events: none;
}
.bk-cover__imprint { font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.28em; text-transform: uppercase; color: rgba(244,236,218,0.62); }
.bk-cover__title { font-family: var(--bk-display); font-size: 78px; line-height: 0.96; margin: 0; letter-spacing: -0.01em; }
.bk-cover__rule { width: 56px; height: 2px; background: var(--bk-ochre); margin: 24px 0; }
.bk-cover__sub { font-family: var(--bk-serif); font-style: italic; font-size: 21px; color: rgba(244,236,218,0.9); line-height: 1.4; }
.bk-cover__emblem { width: 96px; height: 96px; margin: 30px 0; }
.bk-cover__open {
  margin-top: auto; display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--bk-mono); font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--bk-ochre); cursor: pointer; background: none; border: none; padding: 0; white-space: nowrap;
}
.bk-cover__open .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--bk-ochre); animation: bkpulse 1.8s var(--bk-ease) infinite; }
@keyframes bkpulse { 0%,100%{opacity:0.35; transform:scale(0.8)} 50%{opacity:1; transform:scale(1.25)} }
/* ---- switch to the classic website ---- */
.bk-cover__classic { display: inline-block; align-self: flex-start; margin: 16px 0 0; font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(244,236,218,0.62); border-bottom: 1px solid transparent; transition: color .2s, border-color .2s; }
.bk-cover__classic:hover { color: #F4ECDA; border-color: rgba(244,236,218,0.5); }

/* ============================================================
   OPENING RITUAL — the closed book that clicks open.
   Ported from monograph.css §6, recolored to coral (--bk-ember).
   The book lands closed; on first click the cover swings ~162°
   off its left-edge hinge to reveal the first spread underneath.
   Plays once (persisted), respects prefers-reduced-motion.
   ============================================================ */
.bk-openbook { perspective: 2400px; }
.bk-openbook .bk-cover {
  position: absolute; inset: 0; z-index: 9; transform-origin: left center;
  backface-visibility: hidden; cursor: pointer;
  transition: transform 900ms var(--bk-flip), box-shadow 900ms var(--bk-flip);
}
.bk-openbook.is-open .bk-cover { transform: rotateY(-162deg); box-shadow: 0 30px 50px rgba(0,0,0,0.4); pointer-events: none; }
.bk-opencue {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); z-index: 11;
  font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase;
  color: rgba(244,236,218,0.7); pointer-events: none; transition: opacity var(--bk-ease);
  animation: bkCue 1.8s var(--bk-ease) infinite;
}
.bk-openbook.is-open .bk-opencue { opacity: 0; }
@keyframes bkCue { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,5px); } }
.bk-menu__exit { display: block; width: 100%; text-align: left; margin-top: 16px; padding: 14px 0 2px; border: none; border-top: 1px solid rgba(153,141,120,0.3); background: none; cursor: pointer; font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--bk-ink-faint); transition: color .2s; }
.bk-menu__exit:hover { color: var(--bk-ember); }

/* ============================================================
   CONTACT / TABLE / COMPONENTS
   ============================================================ */
.bk-toc { display: flex; flex-direction: column; gap: 2px; margin-top: 8px; }
.bk-toc__item {
  /* button reset — now a <button> for keyboard + mobile touch accessibility */
  appearance: none; -webkit-appearance: none;
  border: none; background: none; text-align: left; font: inherit; color: inherit; width: 100%;
  /* layout */
  display: grid; grid-template-columns: 30px 1fr auto; align-items: baseline; gap: 14px;
  padding: 14px 8px; cursor: pointer; border-radius: 6px;
  transition: background var(--bk-ease), transform var(--bk-ease);
  /* ensure minimum tap target */
  min-height: 44px;
}
.bk-toc__item:hover { background: rgba(192,81,43,0.07); transform: translateX(6px); }
.bk-toc__item:focus-visible { outline: 2px solid var(--bk-ochre); outline-offset: 2px; }
.bk-toc__num { font-family: var(--bk-mono); font-size: 12px; color: var(--bk-ember); }
.bk-toc__name { font-family: var(--bk-display); font-size: 27px; color: var(--bk-ink); line-height: 1; }
.bk-toc__name small { display: block; font-family: var(--bk-serif); font-size: 12.5px; color: var(--bk-ink-faint); margin-top: 5px; letter-spacing: 0.01em; }
.bk-toc__pg { font-family: var(--bk-mono); font-size: 12px; color: var(--bk-ink-faint); white-space: nowrap; }
.bk-toc__dots { border-bottom: 1.5px dotted var(--bk-ink-faint); align-self: center; height: 1px; opacity: 0.5; }

.bk-list { display: flex; flex-direction: column; }
.bk-item { padding: 8px 0; border-top: 1px solid var(--bk-rule); }
.bk-item:first-child { border-top: none; }
.bk-item__top { display: flex; justify-content: space-between; align-items: baseline; gap: 14px; }
.bk-item__tag { font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--bk-ink-faint); white-space: nowrap; }
.bk-item__metric { font-family: var(--bk-display); font-size: 26px; font-style: italic; color: var(--bk-ember); line-height: 1; white-space: nowrap; }
.bk-item h4 { font-family: var(--bk-serif); font-weight: 600; font-size: 19px; margin: 3px 0 5px; color: var(--bk-ink); }
.bk-item p { font-family: var(--bk-serif); font-size: 14px; line-height: 1.55; color: var(--bk-ink-soft); margin: 0; }

.bk-feature {
  background: var(--bk-paper-deep); border-radius: 10px; padding: 26px 28px;
  border-left: 3px solid var(--bk-ember); margin-top: 6px;
}
.bk-feature__metric { font-family: var(--bk-display); font-size: 50px; font-style: italic; color: var(--bk-ember); line-height: 0.9; }

.bk-principle { display: grid; grid-template-columns: 40px 1fr; gap: 14px; padding: 14px 0; border-top: 1px solid var(--bk-rule); }
.bk-principle:first-of-type { border-top: none; }
.bk-principle__n { font-family: var(--bk-display); font-style: italic; font-size: 30px; color: var(--bk-ochre); line-height: 0.9; }
.bk-principle h4 { font-family: var(--bk-serif); font-weight: 600; font-size: 16.5px; margin: 0 0 3px; color: var(--bk-ink); }
.bk-principle p { font-family: var(--bk-serif); font-size: 13.5px; line-height: 1.5; color: var(--bk-ink-soft); margin: 0; }

.bk-confession {
  margin-top: 18px; padding: 20px 22px; border: 1.5px solid var(--bk-ember);
  border-radius: 10px; background: rgba(192,81,43,0.05); position: relative;
}
.bk-confession__label { position: absolute; top: -10px; left: 18px; background: var(--bk-paper); padding: 0 10px; font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--bk-ember); }
.bk-confession p { font-family: var(--bk-serif); font-size: 14px; line-height: 1.58; color: var(--bk-ink); margin: 0 0 8px; }
.bk-confession p:last-child { margin-bottom: 0; }

.bk-pattern { padding: 16px 0; border-top: 1px solid var(--bk-rule); display: grid; grid-template-columns: 54px 1fr; gap: 16px; align-items: start; }
.bk-pattern:first-of-type { border-top: none; }
.bk-pattern__dia { width: 54px; height: 54px; }
.bk-pattern h4 { font-family: var(--bk-serif); font-weight: 600; font-size: 16px; margin: 0 0 4px; color: var(--bk-ink); }
.bk-pattern p { font-family: var(--bk-serif); font-size: 13px; line-height: 1.5; color: var(--bk-ink-soft); margin: 0; }

.bk-writing { padding: 13px 0; border-top: 1px solid var(--bk-rule); }
.bk-writing:first-of-type { border-top: none; }
.bk-writing__date { font-family: var(--bk-mono); font-size: 10.5px; letter-spacing: 0.08em; color: var(--bk-ink-faint); }
.bk-writing h4 { font-family: var(--bk-serif); font-weight: 600; font-size: 17px; margin: 3px 0 3px; color: var(--bk-ink); }
.bk-writing p { font-family: var(--bk-serif); font-size: 13px; line-height: 1.5; color: var(--bk-ink-soft); margin: 0; }

.bk-pull {
  font-family: var(--bk-display); font-style: italic; font-size: 30px; line-height: 1.22;
  color: var(--bk-ink); margin: 0; border-top: 2px solid var(--bk-ochre); border-bottom: 2px solid var(--bk-ochre);
  padding: 22px 0;
}
.bk-pull cite { display: block; font-family: var(--bk-mono); font-style: normal; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--bk-ink-faint); margin-top: 14px; }

.bk-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.bk-chip { font-family: var(--bk-mono); font-size: 10.5px; letter-spacing: 0.06em; text-transform: uppercase; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--bk-ink-faint); color: var(--bk-ink-soft); white-space: nowrap; }

/* buttons + form */
.bk-btn {
  display: inline-flex; align-items: center; gap: 9px; cursor: pointer; border: none; white-space: nowrap;
  font-family: var(--bk-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 14px 22px; border-radius: 4px; background: var(--bk-ember); color: #F7F0E1;
  text-decoration: none;
  transition: transform var(--bk-ease), background var(--bk-ease);
}
.bk-btn:hover { transform: translateY(-2px); background: var(--bk-ember-deep); }
.bk-btn--ghost { background: transparent; color: var(--bk-ink); border: 1.5px solid var(--bk-ink); }
.bk-btn--ghost:hover { background: var(--bk-ink); color: var(--bk-paper); }
.bk-form { display: flex; flex-direction: column; gap: 11px; margin-top: 6px; }
.bk-form input {
  font-family: var(--bk-serif); font-size: 15px; padding: 13px 4px; border: none;
  border-bottom: 1.5px solid var(--bk-ink-faint); background: transparent; color: var(--bk-ink);
}
.bk-form input::placeholder { color: var(--bk-ink-faint); }
.bk-form input:focus { outline: none; border-bottom-color: var(--bk-ember); }
.bk-form .bk-btn { align-self: flex-start; margin-top: 6px; }
.bk-ok { font-family: var(--bk-display); font-style: italic; font-size: 22px; color: var(--bk-pine); }
.bk-contactlinks { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
.bk-contactlinks a { font-family: var(--bk-serif); font-size: 15px; color: var(--bk-ink); text-decoration: none; display: flex; justify-content: space-between; border-bottom: 1px solid var(--bk-rule); padding: 9px 0; transition: color var(--bk-ease); }
.bk-contactlinks a:hover { color: var(--bk-ember); }
.bk-contactlinks a span { font-family: var(--bk-mono); font-size: 11px; color: var(--bk-ink-faint); }

.bk-spacer { flex: 1; }

/* ============================================================
   CASE STUDY pages
   ============================================================ */
.bk-standfirst {
  font-family: var(--bk-display); font-style: italic; font-size: 22px; line-height: 1.3;
  color: var(--bk-ink-soft); margin: 6px 0 0; max-width: 30ch; text-wrap: pretty;
}
.bk-meta {
  display: grid; grid-template-columns: auto 1fr; gap: 6px 20px; margin: 12px 0 0; padding: 10px 0;
  border-top: 1px solid var(--bk-rule); border-bottom: 1px solid var(--bk-rule);
}
.bk-meta dt { font-family: var(--bk-mono); font-size: 9.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--bk-ink-faint); padding-top: 2px; }
.bk-meta dd { font-family: var(--bk-serif); font-size: 14.5px; color: var(--bk-ink); margin: 0; }

/* a narrative beat (Context / Tension / Decision / Outcome) */
.bk-beat { margin-top: 14px; }
.bk-beat__label { display: flex; align-items: baseline; gap: 11px; margin-bottom: 9px; }
.bk-beat__n { font-family: var(--bk-display); font-style: italic; font-size: 18px; color: var(--bk-ochre); }
.bk-beat__t { font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--bk-ember); font-weight: 500; white-space: nowrap; }

/* numbered design moves */
.bk-moves { display: flex; flex-direction: column; margin-top: 6px; }
.bk-move { display: grid; grid-template-columns: 34px 1fr; gap: 13px; padding: 13px 0; border-top: 1px solid var(--bk-rule); }
.bk-move:first-child { border-top: none; padding-top: 4px; }
.bk-move__n { font-family: var(--bk-display); font-style: italic; font-size: 27px; color: var(--bk-ember); line-height: 0.85; }
.bk-move h4 { font-family: var(--bk-serif); font-weight: 600; font-size: 16px; margin: 0 0 3px; color: var(--bk-ink); }
.bk-move p { font-family: var(--bk-serif); font-size: 13.5px; line-height: 1.5; color: var(--bk-ink-soft); margin: 0; }

/* outcome metric grid */
.bk-metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; margin: 8px 0 4px; }
.bk-metric { padding: 14px 0; border-top: 1px solid var(--bk-rule); }
.bk-metric__v { font-family: var(--bk-display); font-style: italic; font-size: 44px; color: var(--bk-ember); line-height: 0.9; }
.bk-metric__l { font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--bk-ink-faint); margin-top: 7px; line-height: 1.3; }

/* striped figure placeholder (drop a screenshot here) */
.bk-figure {
  position: relative; border: 1px solid var(--bk-paper-edge); border-radius: 8px;
  min-height: 168px; display: grid; place-items: center; overflow: hidden; margin-top: 18px;
  background:
    repeating-linear-gradient(135deg, rgba(44,38,32,0.045) 0 9px, transparent 9px 18px),
    var(--bk-paper-deep);
}
.bk-figure__tag {
  position: absolute; top: 11px; left: 11px; font-family: var(--bk-mono); font-size: 9px;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--bk-ink-faint); white-space: nowrap;
  background: var(--bk-paper); padding: 3px 8px; border-radius: 3px;
}
.bk-figure__mid { font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.04em; color: var(--bk-ink-faint); text-align: center; padding: 0 26px; max-width: 32ch; line-height: 1.5; }

/* ============================================================
   PATTERN pages
   ============================================================ */
.bk-pat-hero { width: 78px; height: 78px; margin-bottom: 16px; }
.bk-principle-stmt {
  font-family: var(--bk-display); font-style: italic; font-size: 33px; line-height: 1.16;
  color: var(--bk-ink); margin: 8px 0 16px; text-wrap: pretty;
}
.bk-dodont { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 8px; }
.bk-dd ul { margin: 0; padding: 0; list-style: none; }
.bk-dd__head { font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; padding-bottom: 9px; margin-bottom: 11px; border-bottom: 1.5px solid; }
.bk-dd--do .bk-dd__head { color: var(--bk-pine); border-color: var(--bk-pine); }
.bk-dd--dont .bk-dd__head { color: var(--bk-ember); border-color: var(--bk-ember); }
.bk-dd li { font-family: var(--bk-serif); font-size: 13.5px; line-height: 1.46; color: var(--bk-ink-soft); padding-left: 17px; position: relative; margin-bottom: 11px; text-wrap: pretty; }
.bk-dd li:last-child { margin-bottom: 0; }
.bk-dd li::before { position: absolute; left: 0; top: -1px; font-family: var(--bk-mono); font-size: 15px; }
.bk-dd--do li::before { content: "+"; color: var(--bk-pine); }
.bk-dd--dont li::before { content: "\2013"; color: var(--bk-ember); }

.bk-instance {
  margin-top: 22px; padding: 18px 20px; background: var(--bk-paper-deep);
  border-radius: 10px; border-left: 3px solid var(--bk-ochre);
}
.bk-instance__label { font-family: var(--bk-mono); font-size: 9.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--bk-ochre); margin-bottom: 9px; }
.bk-instance p { font-family: var(--bk-serif); font-size: 14px; line-height: 1.55; color: var(--bk-ink); margin: 0; }
.bk-instance p .bk-em { font-style: italic; }

/* clickable affordances on overview spreads */
.bk-feature--link { cursor: pointer; transition: transform var(--bk-ease), box-shadow var(--bk-ease); }
.bk-feature--link:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(34,28,22,0.12); }
.bk-feature__more { font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--bk-ember); margin-top: 14px; display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.bk-feature__more span { color: var(--bk-ink-faint); }
.bk-item--link { cursor: pointer; border-radius: 6px; transition: background var(--bk-ease), transform var(--bk-ease); }
.bk-item--link:hover { background: rgba(192,81,43,0.07); transform: translateX(6px); }
.bk-item__case, .bk-pattern__go { font-family: var(--bk-mono); font-size: 9.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--bk-ember); margin-left: 9px; vertical-align: 2px; }
.bk-pattern--link { cursor: pointer; border-radius: 8px; transition: background var(--bk-ease), transform var(--bk-ease); padding-left: 6px; padding-right: 6px; margin-left: -6px; }
.bk-pattern--link:hover { background: rgba(192,81,43,0.07); transform: translateX(6px); }

/* ============================================================
   PAGE-TURN — realistic 3D leaf flip (desktop)
   ============================================================ */
.bk-spread { perspective: 2600px; }
.bk-leaf {
  position: absolute; top: 0; bottom: 0; width: 50%; z-index: 8;
  transform-style: preserve-3d; pointer-events: none; will-change: transform;
}
.bk-leaf--next { left: 50%; transform-origin: left center;  animation: leafNext var(--leaf-dur,840ms) var(--bk-flip) forwards; }
.bk-leaf--prev { left: 0;   transform-origin: right center; animation: leafPrev var(--leaf-dur,840ms) var(--bk-flip) forwards; }
.bk-leaf__face { position: absolute; inset: 0; backface-visibility: hidden; overflow: hidden; background: var(--bk-paper); box-shadow: 0 0 50px rgba(34,28,22,0.16); }
.bk-leaf__face .bk-page { width: 100%; height: 100%; }
.bk-leaf__front { border-radius: 0 5px 5px 0; }
.bk-leaf__back  { transform: rotateY(180deg); border-radius: 5px 0 0 5px; }
/* page catches the light as it stands edge-on */
.bk-leaf__gloss { position: absolute; inset: 0; pointer-events: none; background: rgba(22,15,8,0); }
.bk-leaf__front .bk-leaf__gloss { animation: glossFront var(--leaf-dur,840ms) var(--bk-flip) forwards; }
.bk-leaf__back  .bk-leaf__gloss { animation: glossBack  var(--leaf-dur,840ms) var(--bk-flip) forwards; }
@keyframes leafNext { from { transform: rotateY(0deg); }   to { transform: rotateY(-180deg); } }
@keyframes leafPrev { from { transform: rotateY(0deg); }   to { transform: rotateY(180deg); } }
@keyframes glossFront { 0% { background: rgba(22,15,8,0); } 55% { background: rgba(22,15,8,0.12); } 100% { background: rgba(22,15,8,0.42); } }
@keyframes glossBack  { 0% { background: rgba(22,15,8,0.42); } 45% { background: rgba(22,15,8,0.10); } 100% { background: rgba(22,15,8,0); } }

/* spread fade for content swap */
.bk-spread { transition: opacity 200ms var(--bk-ease); }
.bk-spread.swapping { opacity: 0; }

/* reveal on enter — transform-only so content is ALWAYS visible
   (some capture/preview environments freeze the animation clock at frame 0;
   keeping opacity:1 guarantees legibility regardless). */
.bk-reveal > * { animation: bkReveal 520ms var(--bk-ease) both; }
.bk-reveal > *:nth-child(2) { animation-delay: 60ms; }
.bk-reveal > *:nth-child(3) { animation-delay: 120ms; }
.bk-reveal > *:nth-child(4) { animation-delay: 180ms; }
.bk-reveal > *:nth-child(5) { animation-delay: 240ms; }
.bk-reveal > *:nth-child(6) { animation-delay: 300ms; }
.bk-reveal > *:nth-child(7) { animation-delay: 360ms; }
/* opacity-only entrance — NO vertical translate, so the book never shifts on a page-flip
   (0.35 floor keeps content legible even if a capture freezes the clock at frame 0) */
@keyframes bkReveal { from { opacity: 0.35; } to { opacity: 1; } }

@media (prefers-reduced-motion: reduce) {
  .bk-leaf { animation: none !important; display: none; }
  .bk-reveal > * { animation: none !important; transform: none !important; }
  .bk-cover__open .dot { animation: none; }
  .bk-openbook .bk-cover { transition: none; }
  .bk-opencue { animation: none; }
}

/* ============================================================
   NAV (outside the scaled book)
   ============================================================ */
.bk-arrow {
  position: fixed; top: 50%; transform: translateY(-50%); z-index: 20;
  width: 56px; height: 56px; border-radius: 50%; cursor: pointer;
  /* WCAG 1.4.11 — button boundary must hit 3:1 against adjacent bg.
     Ember (#C0512B) on dark desk (#1B1613) = 3.80:1 ✓
     Cream icon (#F4ECDA) on ember = 4.01:1 ✓ (WCAG AA large) */
  background: rgba(192,81,43,0.88); border: 1.5px solid rgba(244,236,218,0.40);
  color: #F4ECDA; display: grid; place-items: center; backdrop-filter: blur(4px);
  transition: background var(--bk-ease), transform var(--bk-ease), opacity var(--bk-ease);
}
.bk-arrow:hover { background: rgba(192,81,43,1); }
.bk-arrow--prev { left: 26px; } .bk-arrow--prev:hover { transform: translateY(-50%) translateX(-3px); }
.bk-arrow--next { right: 26px; } .bk-arrow--next:hover { transform: translateY(-50%) translateX(3px); }
.bk-arrow[disabled] { opacity: 0; pointer-events: none; }
.bk-arrow svg { width: 22px; height: 22px; }

.bk-progress {
  position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); z-index: 20;
  display: flex; align-items: center; gap: 18px;
  font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(244,236,218,0.66);
  /* pill capsule — matches design system screenshot */
  background: rgba(15,8,5,0.88);
  border: 1px solid rgba(244,236,218,0.18);
  border-radius: 999px;
  padding: 11px 24px;
  backdrop-filter: blur(8px);
}
.bk-progress__dots { display: flex; align-items: center; gap: 7px; }
/* DS look: 7px cream dot, faint inactive, ochre active scaled up.
   A small content-box tap pad keeps the hit target generous without
   inflating the visible dot or the 7px rhythm.
   Now <button> elements: reset browser button defaults first. */
.bk-progress__dot {
  /* button reset */
  appearance: none; -webkit-appearance: none;
  border: none; padding: 2px; margin: 0;
  /* visual */
  box-sizing: content-box; width: 7px; height: 7px;
  background-clip: content-box; border-radius: 50%; cursor: pointer;
  background-color: rgba(244,236,218,0.38);
  transition: background-color var(--bk-ease), transform var(--bk-ease);
}
.bk-progress__dot:hover { background-color: rgba(244,236,218,0.7); }
.bk-progress__dot.on { background-color: var(--bk-ochre); transform: scale(1.25); }
.bk-progress__dot:focus-visible { outline: 2px solid var(--bk-ochre); outline-offset: 3px; }

/* ============================================================
   DEPTH — zoom transition + breadcrumb + back (a level deeper)
   ============================================================ */
.bk-zoomer { position: relative; z-index: 1; display: grid; place-items: center; will-change: transform; }
.bk-zoomer[data-z="in"]  { animation: bkZoomIn 440ms var(--bk-ease); }
.bk-zoomer[data-z="out"] { animation: bkZoomOut 380ms var(--bk-ease); }
@keyframes bkZoomIn  { from { transform: scale(0.92); } to { transform: none; } }
@keyframes bkZoomOut { from { transform: scale(1.06); } to { transform: none; } }

/* the booklet sits smaller + more shadowed when you've gone deeper */
.bk-book--deep { filter: drop-shadow(0 52px 78px rgba(0,0,0,0.55)); }
/* spotlight the smaller booklet by deepening the desk vignette */
.bk-stage--deep::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background: radial-gradient(72% 62% at 50% 47%, transparent 52%, rgba(0,0,0,0.5) 100%);
}

/* breadcrumb — top center */
.bk-crumb {
  position: fixed; top: 22px; left: 50%; transform: translateX(-50%); z-index: 20;
  display: flex; align-items: center; gap: 11px;
  font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(244,236,218,0.62);
}
.bk-crumb button {
  background: none; border: none; padding: 0; cursor: pointer; color: rgba(244,236,218,0.6);
  font: inherit; letter-spacing: inherit; text-transform: inherit; transition: color var(--bk-ease);
}
.bk-crumb button:hover { color: var(--bk-ochre); }
.bk-crumb__sep { color: rgba(244,236,218,0.4); }
.bk-crumb__cur { color: var(--bk-ochre); }

/* desktop logo mark — top left (shown when not in a section) */
.bk-logo-mark {
  position: fixed; top: 19px; left: 26px; z-index: 21;
  display: flex; align-items: center; text-decoration: none;
  opacity: 0.82; transition: opacity var(--bk-ease);
}
.bk-logo-mark:hover { opacity: 1; }
.bk-logo-mark img { display: block; width: 32px; height: 32px; }

/* back button — top left */
.bk-back {
  position: fixed; top: 19px; left: 26px; z-index: 21;
  display: flex; align-items: center; gap: 9px; cursor: pointer;
  background: rgba(244,236,218,0.10); border: 1.5px solid rgba(244,236,218,0.30);
  color: #F4ECDA; border-radius: 999px; padding: 9px 17px 9px 13px;
  font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  backdrop-filter: blur(4px); transition: background var(--bk-ease), transform var(--bk-ease);
}
.bk-back:hover { background: rgba(244,236,218,0.20); transform: translateX(-2px); }
.bk-progress__esc { cursor: pointer; transition: color var(--bk-ease); }
.bk-progress__esc:hover { color: var(--bk-ochre); }

/* mobile back bar */
.bk-m-back {
  display: flex; align-items: center; gap: 6px; cursor: pointer;
  background: none; border: none; padding: 0; color: var(--bk-ochre);
  font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
}
.bk-m-back svg { width: 13px; height: 13px; }

/* ============================================================
   MOBILE — single-page reader (book becomes one page at a time)
   ============================================================ */
.bk-mobile { position: fixed; inset: 0; display: flex; flex-direction: column; background: var(--bk-desk-2); }
.bk-m-top {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 14px 20px; color: rgba(244,236,218,0.78);
  font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase;
}
.bk-m-top .name { color: var(--bk-ochre); }
.bk-m-jump {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  background: var(--bk-ember); border: none; padding: 7px 14px; border-radius: 20px; color: #F4ECDA;
  font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
}
.bk-m-jump svg { width: 14px; height: 14px; }
.bk-m-stage { flex: 1; min-height: 0; position: relative; overflow: hidden; }
.bk-m-page {
  position: absolute; inset: 0; overflow-y: auto; -webkit-overflow-scrolling: touch;
  padding: 32px 26px 104px;
  background: var(--bk-paper);
  /* page-flip: origin at the leading edge — right for forward, left for backward */
  transform-origin: var(--m-origin, 50% 50%);
  animation: mFlip 440ms var(--bk-flip) both;
  z-index: 4;
}
.bk-m-page--cover { padding: 0; overflow: hidden; animation: none; }
.bk-m-folio { font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.12em; color: var(--bk-ink-faint); margin-top: 28px; text-align: center; }
@keyframes mFlip {
  from { transform: perspective(1400px) rotateY(var(--m-rot, 0deg)); opacity: 0.5; }
  to   { transform: perspective(1400px) rotateY(0deg); opacity: 1; }
}

.bk-m-nav {
  position: absolute; bottom: 0; left: 0; right: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 16px 20px 22px;
  background: linear-gradient(0deg, var(--bk-desk-2) 40%, rgba(20,32,29,0));
}
.bk-m-btn {
  width: 48px; height: 48px; border-radius: 50%; flex: none; cursor: pointer;
  border: 1.5px solid rgba(244,236,218,0.55); background: rgba(244,236,218,0.20);
  color: #F4ECDA; display: grid; place-items: center;
}
.bk-m-btn:disabled { opacity: 0.25; }
.bk-m-btn svg { width: 20px; height: 20px; }
.bk-m-label { flex: 1; text-align: center; color: rgba(244,236,218,0.8); font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; }

/* tap zones removed — swipe is now handled via onTouchStart/onTouchEnd on
   the stage element, so these rules are kept only as a safety fallback */
.bk-m-tap { display: none; }

/* mobile cover + type tightening */
.bk-mobile .bk-cover { width: 100%; height: 100%; border-radius: 0; padding: 52px 38px; }
.bk-mobile .bk-cover__title { font-size: clamp(48px, 15vw, 68px); }
.bk-mobile .bk-cover__sub { font-size: 18px; }
.bk-mobile .bk-title--xl { font-size: clamp(44px, 13vw, 58px); }
.bk-mobile .bk-title--l  { font-size: clamp(38px, 11vw, 48px); }
.bk-mobile .bk-title--m  { font-size: clamp(30px, 9vw, 38px); }
.bk-mobile .bk-feature__metric { font-size: 42px; }
.bk-mobile .bk-pull { font-size: 25px; }
.bk-mobile .bk-toc__name { font-size: 24px; }
.bk-mobile .bk-note { font-size: 21px; }
.bk-mobile .bk-metrics, .bk-mobile .bk-dodont { grid-template-columns: 1fr; gap: 0; }
.bk-mobile .bk-dodont { gap: 18px; }
.bk-mobile .bk-metric { border-top: 1px solid var(--bk-rule); }
.bk-mobile .bk-standfirst { font-size: 20px; }
.bk-mobile .bk-principle-stmt { font-size: clamp(26px, 8vw, 32px); }
.bk-mobile .bk-figure { min-height: 150px; }

/* ============================================================
   TABLET — single-page reader at larger canvas (600px–1024px)
   Phone gets the base .bk-mobile rules above.
   Tablet gets bigger padding, larger type, restored 2-col layouts.
   ============================================================ */
@media (min-width: 600px) and (max-width: 1024px) {
  .bk-m-page    { padding: 40px 44px 120px; }
  .bk-m-top     { padding: 16px 28px; }
  .bk-m-nav     { padding: 18px 28px 26px; }
  .bk-m-btn     { width: 56px; height: 56px; }
  .bk-m-label   { font-size: 11px; }
  /* larger body type on tablet canvas */
  .bk-mobile .bk-body      { font-size: 17px; line-height: 1.78; }
  .bk-mobile .bk-lede      { font-size: 20px; }
  .bk-mobile .bk-standfirst { font-size: 22px; }
  .bk-mobile .bk-note      { font-size: 16px; }
  /* restore 2-column layouts that phone collapses to 1 */
  .bk-mobile .bk-metrics   { grid-template-columns: 1fr 1fr; gap: 0; }
  .bk-mobile .bk-dodont    { grid-template-columns: 1fr 1fr; gap: 24px; }
  .bk-mobile .bk-figure    { min-height: 220px; }
  /* larger nav buttons for tablet fingers */
  .bk-m-btn svg { width: 22px; height: 22px; }
}

/* ============================================================
   ADDED PAGES — plates, praise, about, cutting-room, CV
   (ported from the design system; --bk-accent → --bk-ember)
   ============================================================ */

/* photographic plate — drop a real screenshot into the slot */
.bk-plate { position: relative; margin-top: 10px; }
.bk-plate__img {
  position: relative; overflow: hidden; aspect-ratio: 4 / 3;
  border: 1px solid var(--bk-paper-edge); background: var(--bk-paper-deep);
  display: grid; place-items: center; box-shadow: 0 2px 0 rgba(44,38,32,0.06);
}
.bk-plate__img > img { width: 100%; height: 100%; object-fit: cover; }
.bk-plate__img > image-slot { display: block; width: 100%; height: 100%; }
/* duotone wash so any screenshot reads as a printed plate —
   only once the slot is filled (or a real <img> is present), so the
   empty-state "drop here" prompt stays legible */
.bk-plate__img:has(> img)::after,
.bk-plate__img:has(image-slot[data-filled])::after {
  content: ""; position: absolute; inset: 0; mix-blend-mode: multiply; pointer-events: none;
  background: linear-gradient(160deg, rgba(168,57,43,0.22), rgba(34,28,22,0.14));
}
.bk-plate--wide .bk-plate__img { aspect-ratio: 16 / 5; }
.bk-plate--redacted .bk-plate__img {
  background:
    repeating-linear-gradient(135deg, rgba(44,38,32,0.05) 0 9px, transparent 9px 18px),
    var(--bk-paper-deep);
}
.bk-plate__ph { font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.04em; color: var(--bk-ink-faint); text-align: center; padding: 0 24px; max-width: 30ch; line-height: 1.5; position: relative; z-index: 1; }
.bk-plate__cap { display: flex; gap: 10px; align-items: baseline; margin-top: 9px; padding-top: 8px; border-top: 1px solid var(--bk-rule); }
.bk-plate__no { font-family: var(--bk-mono); font-size: 9px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--bk-ember); white-space: nowrap; }
.bk-plate__cn { font-family: var(--bk-serif); font-style: italic; font-size: 12.5px; color: var(--bk-ink-soft); line-height: 1.4; }

/* rubber-stamp overprint — DS's bolder "inked-on" look */
.bk-stamp {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--bk-mono); font-weight: 500; font-size: 13px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--bk-ember); border: 2.5px solid var(--bk-ember); border-radius: 5px;
  padding: 8px 13px; transform: rotate(-7deg); opacity: 0.86; mix-blend-mode: multiply;
  box-shadow: inset 0 0 0 1.5px rgba(255,255,255,0.25);
}
.bk-stamp--r { transform: rotate(5deg); }
.bk-stamp--ok { color: var(--bk-pine); border-color: var(--bk-pine); }
.bk-stamp--ochre { color: #9A6A18; border-color: #9A6A18; }

/* headline-number ledger */
.bk-ledger { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 18px; padding: 16px 0; border-top: 2px solid var(--bk-ember); border-bottom: 2px solid var(--bk-ember); }
.bk-ledger__fig { font-family: var(--bk-display); font-style: italic; font-size: 42px; line-height: 0.82; color: var(--bk-ember); }
.bk-ledger__lbl { font-family: var(--bk-mono); font-size: 9px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--bk-ink-faint); margin-top: 8px; line-height: 1.3; }

/* praise / blurbs */
.bk-blurbs { display: flex; flex-direction: column; gap: 19px; margin-top: 16px; }
.bk-blurb { padding-left: 18px; border-left: 2px solid var(--bk-ochre); }
.bk-blurb p { font-family: var(--bk-display); font-style: italic; font-size: 21px; line-height: 1.3; color: var(--bk-ink); margin: 0; text-wrap: pretty; }
.bk-blurb cite { display: block; font-family: var(--bk-mono); font-style: normal; font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--bk-ink-faint); margin-top: 8px; }

/* cutting-room floor grid */
.bk-floor { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 14px; }
.bk-floor__item { position: relative; }
.bk-floor__item .bk-figure { margin-top: 0; min-height: 116px; }
.bk-floor__lbl { font-family: var(--bk-serif); font-size: 12.5px; line-height: 1.45; color: var(--bk-ink-soft); margin-top: 9px; }
.bk-floor__lbl b { font-weight: 600; color: var(--bk-ink); }
.bk-floor__stamp { position: absolute; top: 8px; right: 8px; z-index: 2; font-size: 9.5px; padding: 3px 7px; }

/* curriculum vitae */
.bk-cv { display: flex; flex-direction: column; }
.bk-cv__row { display: grid; grid-template-columns: 86px 1fr; gap: 16px; padding: 12px 0; border-top: 1px solid var(--bk-rule); }
.bk-cv__row:first-child { border-top: none; }
.bk-cv__yr { font-family: var(--bk-mono); font-size: 10.5px; letter-spacing: 0.05em; color: var(--bk-ember); padding-top: 3px; white-space: nowrap; }
.bk-cv__role { font-family: var(--bk-serif); font-weight: 600; font-size: 15.5px; color: var(--bk-ink); margin: 0; }
.bk-cv__org { font-family: var(--bk-serif); font-size: 13px; color: var(--bk-ink-soft); margin: 2px 0 0; line-height: 1.4; }
.bk-cv__sub { font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--bk-ember); margin: 20px 0 8px; }

/* mobile collapses the two-up grids */
.bk-mobile .bk-floor { grid-template-columns: 1fr; }
.bk-mobile .bk-ledger { grid-auto-flow: row; grid-auto-columns: auto; gap: 14px; }
.bk-mobile .bk-blurb p { font-size: 19px; }

/* ============================================================
   CHAPTER MENU — quick jump to any section + Home (desktop + mobile)
   ============================================================ */
.bk-menu-btn {
  position: fixed; top: 19px; right: 26px; z-index: 21;
  display: flex; align-items: center; gap: 8px; cursor: pointer;
  background: rgba(244,236,218,0.10); border: 1.5px solid rgba(244,236,218,0.30);
  color: #F4ECDA; border-radius: 999px; padding: 9px 16px;
  font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  backdrop-filter: blur(4px); transition: background var(--bk-ease), transform var(--bk-ease);
}
.bk-menu-btn:hover { background: rgba(244,236,218,0.20); transform: translateY(-1px); }
.bk-menu-btn svg { width: 14px; height: 14px; }

.bk-menu {
  position: fixed; inset: 0; z-index: 60; display: grid; place-items: center;
  background: rgba(20,32,29,0.55); backdrop-filter: blur(3px);
  animation: bkMenuFade 200ms var(--bk-ease);
}
@keyframes bkMenuFade { from { opacity: 0; } to { opacity: 1; } }
.bk-menu__panel {
  background: var(--bk-paper); border-radius: 12px; padding: 24px;
  width: min(380px, 90vw); max-height: 84vh; overflow-y: auto;
  box-shadow: 0 30px 70px rgba(0,0,0,0.5);
  animation: bkMenuRise 240ms var(--bk-ease);
}
@keyframes bkMenuRise { from { transform: translateY(10px); opacity: 0.6; } to { transform: none; opacity: 1; } }
.bk-menu__head {
  font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--bk-ember); margin-bottom: 10px;
}
.bk-menu__item {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  padding: 13px 10px; border-radius: 7px; border-top: 1px solid var(--bk-rule);
  transition: background var(--bk-ease), padding-left var(--bk-ease);
}
.bk-menu__item:first-of-type { border-top: none; }
.bk-menu__item:hover { background: rgba(192,81,43,0.08); padding-left: 14px; }
.bk-menu__label { font-family: var(--bk-display); font-size: 23px; color: var(--bk-ink); line-height: 1.05; }
.bk-menu__sub { font-family: var(--bk-mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--bk-ember); white-space: nowrap; }

/* on mobile the menu button lives in the top bar (.bk-m-jump), so hide the fixed desktop pill */
@media (max-width: 1024px) { .bk-menu-btn { display: none; } }

/* About portrait — warm editorial treatment */
.bk-plate__img image-slot::part(image){ filter: sepia(0.14) contrast(1.03); }


/* ============================================================
   ICONOGRAPHY — engraved line glyphs + social marks
   Adopted from The Monograph design system; accent recolored to
   the book's --bk-ember coral. Rendered via monograph-icons.js.
   ============================================================ */
.bk-iconwrap { display: inline-flex; align-items: center; line-height: 0; }
.bk-icon { width: 1.25em; height: 1.25em; flex: none; display: inline-block; vertical-align: -0.18em; }
.bk-icon--sm { width: 1em; height: 1em; }
.bk-icon--lg { width: 1.6em; height: 1.6em; }
.bk-icon--xl { width: 2.6em; height: 2.6em; }
.bk-icon--accent { color: var(--bk-ember); }
.bk-icon--ochre  { color: var(--bk-ochre); }
.bk-icon--pine   { color: var(--bk-pine); }
.bk-icon--faint  { color: var(--bk-ink-faint); }

.bk-ilink {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--bk-ember); text-decoration: none;
  font-family: var(--bk-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  transition: gap var(--bk-ease), color var(--bk-ease);
}
.bk-ilink:hover { gap: 11px; color: var(--bk-ember-deep); }
.bk-iconbtn {
  width: 40px; height: 40px; border-radius: 50%; flex: none; cursor: pointer;
  display: grid; place-items: center; background: transparent; border: none; color: var(--bk-ink-soft);
  transition: background var(--bk-ease), color var(--bk-ease);
}
.bk-iconbtn:hover { background: rgba(34,28,22,0.06); color: var(--bk-ink); }

.bk-social { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.bk-social__btn {
  width: 44px; height: 44px; border-radius: 50%; flex: none;
  display: grid; place-items: center; text-decoration: none; cursor: pointer;
  border: 1.5px solid var(--bk-ink); color: var(--bk-ink); background: transparent;
  transition: background var(--bk-ease), color var(--bk-ease), border-color var(--bk-ease), transform var(--bk-ease);
}
.bk-social__btn .bk-icon { width: 19px; height: 19px; vertical-align: 0; }
.bk-social__btn:hover { background: var(--bk-ember); border-color: var(--bk-ember); color: var(--bk-paper); transform: translateY(-2px); }
.bk-social--sm .bk-social__btn { width: 36px; height: 36px; }
.bk-social--sm .bk-social__btn .bk-icon { width: 16px; height: 16px; }
.bk-social--invert .bk-social__btn { border-color: rgba(244,236,218,0.45); color: var(--bk-paper); }
.bk-social--invert .bk-social__btn:hover { background: var(--bk-paper); color: var(--bk-ink); border-color: var(--bk-paper); }

@media (max-width: 1024px) { .bk-ilink:hover { gap: 8px; } }

/* ============================================================
   PRINTER'S MARK / MONOGRAM — recurring colophon device.
   Ported from The Monograph design system; accent recolored to
   the book's --bk-ember coral. Repeats on cover/bookmark/openers.
   ============================================================ */
.bk-device { display: inline-flex; flex-direction: column; align-items: center; gap: 7px; }
.bk-device__mark {
  width: 60px; height: 60px; display: grid; place-items: center; border-radius: 50%;
  border: 1.5px solid var(--bk-ember); color: var(--bk-ember);
  font-family: var(--bk-display); font-style: italic; font-size: 27px; letter-spacing: -0.02em;
}
.bk-device__label { font-family: var(--bk-mono); font-size: 8px; letter-spacing: 0.26em; text-transform: uppercase; color: var(--bk-ink-faint); }
.bk-device--on-dark .bk-device__mark { border-color: var(--bk-paper); color: var(--bk-paper); }
.bk-device--on-dark .bk-device__label { color: rgba(244,236,218,0.6); }

/* ============================================================
   EPHEMERA — taped photo, sticky note, coffee ring. The scrapbook
   layer: physical artifacts tucked among the formal typesetting.
   Ported from the design system; use sparingly (1-2 per spread).
   ============================================================ */
/* a taped-in Polaroid / snapshot */
.bk-tape { position: relative; background: #FBF7EC; padding: 9px 9px 30px; box-shadow: 0 9px 20px rgba(0,0,0,0.20); transform: rotate(-3deg); }
.bk-tape::before, .bk-tape::after {
  content: ""; position: absolute; top: -10px; width: 58px; height: 21px;
  background: rgba(206,182,120,0.42); box-shadow: 0 1px 2px rgba(0,0,0,0.10);
}
.bk-tape::before { left: 12px; transform: rotate(-8deg); }
.bk-tape::after  { right: 12px; transform: rotate(7deg); }
.bk-tape__cap { position: absolute; left: 0; right: 0; bottom: 7px; text-align: center; font-family: var(--bk-hand); font-size: 17px; color: var(--bk-ink-soft); }

/* a stuck-on sticky note */
.bk-sticky {
  position: relative; padding: 16px 16px 18px; transform: rotate(2deg);
  background: linear-gradient(180deg, #EBDFAE, #E4D69A); color: #5A4A22;
  font-family: var(--bk-hand); font-size: 19px; line-height: 1.18;
  box-shadow: 0 8px 16px rgba(0,0,0,0.16);
}
.bk-sticky::after { content: ""; position: absolute; top: 0; right: 0; border-width: 0 16px 16px 0; border-style: solid; border-color: rgba(0,0,0,0.10) transparent; }

/* a coffee-ring stain — decorative, place absolutely, low z */
.bk-coffee {
  position: absolute; width: 92px; height: 92px; border-radius: 50%; pointer-events: none;
  border: 7px solid rgba(120,74,38,0.13);
  box-shadow: inset 0 0 0 2px rgba(120,74,38,0.05), 0 0 0 1px rgba(120,74,38,0.06);
  transform: rotate(12deg);
}

/* Keyboard focus indicators (WCAG 2.4.7) — visible rings for keyboard users only.
   Reuses the .bk-progress__dot:focus-visible pattern. :focus-visible keeps mouse clicks ring-free. */
.bk-arrow:focus-visible,
.bk-menu-btn:focus-visible { outline: 2px solid var(--bk-ochre); outline-offset: 3px; border-radius: 50%; }
.bk-tab:focus-visible { outline: 2px solid var(--bk-ochre); outline-offset: 3px; border-radius: 4px; }
.bk-btn:focus-visible { outline: 2px solid var(--bk-ochre); outline-offset: 3px; border-radius: 6px; }
.bk-item--link:focus-visible { outline: 2px solid var(--bk-ochre); outline-offset: 3px; border-radius: 6px; }
.bk-pattern--link:focus-visible { outline: 2px solid var(--bk-ochre); outline-offset: 3px; border-radius: 8px; }
.bk-menu__item:focus-visible { outline: 2px solid var(--bk-ochre); outline-offset: 3px; }