/* ============================================
   BOOK.CSS — «Книга директора» (/direktoru-kniga/)
   Mockup: static/kniga-direktora/book-page.html
   Brand tokens (tokens.css) are scoped to .book-page so they don't leak
   into the shared header/footer. Font stays the site-wide Geologica.
   ============================================ */

.book-page {
  --ink-900: #1a1a1a;
  --ink-800: #242322;
  --ink-700: #3a3733;
  --gold-500: #c09441;
  --gold-400: #d1a957;
  --gold-700: #7d5d1f;   /* gold TEXT on light backgrounds (5.5:1) */
  --cream-100: #f4f2ee;
  --paper: #ffffff;
  --text: var(--ink-900);
  --text-muted: #5f5a52;
  --text-on-dark: var(--cream-100);
  --muted-on-dark: #9b968c;
  --line-light: #d9d3c7;

  background-color: var(--cream-100);
  color: var(--text);
}

/* Overline label */
.book-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* Gold button: dark text on gold — white on gold fails contrast (2.6:1) */
.btn--gold {
  background-color: var(--gold-500);
  border-color: var(--gold-500);
  color: var(--ink-900);
}

.btn--gold:hover,
.btn--gold:focus-visible {
  background-color: var(--gold-400);
  border-color: var(--gold-400);
}

.book-btn {
  gap: 0.625rem;
  min-height: 3.5rem;
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
}

.book-link {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cream-100);
  border-bottom: 2px solid var(--gold-500);
  padding-bottom: 4px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.book-link:hover,
.book-link:focus-visible {
  color: var(--gold-400);
  border-color: var(--gold-400);
}

/* ── 1. HERO ── */

.book-hero {
  position: relative;
  background-color: var(--ink-900);
  color: var(--text-on-dark);
  overflow: hidden;
}

.book-hero__photo {
  position: absolute;
  inset: 0 0 0 35%;
  background: url('../../img/hero-images/kniga-direktora.webp') center / cover no-repeat;
  opacity: 0.5;
}

.book-hero__photo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--ink-900) 0%, rgba(26, 26, 26, 0.3) 55%, rgba(26, 26, 26, 0.6) 100%);
}

.book-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 5rem;
  align-items: center;
  padding-block: 3.5rem 6rem;
}

.book-hero__eyebrow {
  color: var(--gold-500);
  margin-bottom: 1.25rem;
}

.book-hero__title {
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  line-height: 0.95;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 2rem;
}

.book-hero__name {
  font-size: 1.375rem;
  line-height: 1.4;
  font-weight: 600;
  max-width: 620px;
  margin-bottom: 0.625rem;
}

.book-hero__authors {
  font-size: 0.9375rem;
  color: var(--muted-on-dark);
  margin-bottom: 2.5rem;
}

.book-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem 2rem;
}

/* Book cover — pure CSS, decorative */
.book-cover {
  position: relative;
  width: 300px;
  aspect-ratio: 300 / 424;
  margin-left: auto;
  transform: perspective(1400px) rotateY(-14deg);
  transform-origin: left center;
}

.book-cover__spine {
  position: absolute;
  left: -18px;
  top: 0;
  bottom: 0;
  width: 18px;
  background-color: #121212;
}

.book-cover__face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: 34px 28px;
  background-color: var(--ink-800);
  border: 1px solid var(--ink-700);
  box-shadow: 24px 30px 60px rgba(0, 0, 0, 0.55);
}

.book-cover__eyebrow {
  color: var(--gold-500);
  font-size: 0.625rem;
}

.book-cover__rule {
  height: 2px;
  width: 44px;
  background-color: var(--gold-500);
  margin-block: 20px;
}

.book-cover__kicker {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--gold-500);
}

.book-cover__title {
  font-size: 1.3125rem;
  line-height: 1.18;
  font-weight: 800;
  color: var(--cream-100);
  margin-top: 8px;
  hyphens: manual;
}

.book-cover__authors {
  margin-top: auto;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--muted-on-dark);
}

.book-cover__authors b {
  display: block;
  color: var(--cream-100);
  font-weight: 600;
}

.book-cover__rails {
  position: absolute;
  right: 28px;
  bottom: 34px;
  display: grid;
  gap: 7px;
}

.book-cover__rails i {
  display: block;
  width: 60px;
  height: 2px;
  background-color: var(--gold-500);
  opacity: 0.8;
}

/* ── 2. STATS ── */

.book-stats {
  position: relative;
  background-color: var(--ink-800);
  border-top: 1px solid var(--ink-700);
}

.book-stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.book-stats__item {
  padding: 2.25rem 2rem 2.5rem;
  border-left: 1px solid var(--ink-700);
}

.book-stats__item:first-child {
  border-left: 0;
  padding-left: 0;
}

.book-stats__item dt {
  font-size: clamp(2.125rem, 4vw, 3.25rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--gold-500);
  margin-bottom: 0.75rem;
  white-space: nowrap;
}

.book-stats__item dd {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--cream-100);
}

/* ── 3. WALKTHROUGH ── */

.book-walk {
  padding-block: 6rem;
}

.book-walk__head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
  margin-bottom: 4rem;
}

.book-walk__eyebrow {
  color: var(--gold-700);
  margin-bottom: 0.875rem;
}

.book-walk__title {
  font-size: clamp(1.875rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.book-walk__quote blockquote {
  font-size: 1.25rem;
  line-height: 1.55;
  font-weight: 500;
  padding-top: 6px;
  quotes: '«' '»';
}

.book-walk__quote blockquote:lang(en) {
  quotes: '“' '”';
}

.book-walk__quote blockquote p::before,
.book-walk__quote blockquote p::after {
  color: var(--gold-500);
  font-weight: 800;
}

.book-walk__quote blockquote p::before { content: open-quote; }
.book-walk__quote blockquote p::after { content: close-quote; }

.book-walk__quote figcaption {
  margin-top: 0.875rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.book-chapter {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) 380px;
  gap: 3rem;
  padding-block: 2.5rem;
  border-top: 1px solid var(--line-light);
}

.book-chapter__num,
.book-end__num {
  font-size: clamp(3rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 0.85;
  color: var(--gold-500);
}

.book-chapter__title {
  font-size: clamp(1.375rem, 2.2vw, 1.625rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.book-chapter__pages {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.book-chapter__text {
  font-size: 1rem;
  line-height: 1.6;
}

.book-chapter__key {
  background-color: var(--paper);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
}

.book-chapter__key .book-eyebrow {
  color: var(--gold-700);
  margin-bottom: 0.625rem;
}

.book-chapter__key p:last-child {
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ── 4. FULL VERSION CTA ── */

.book-end {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) auto;
  gap: 3rem;
  align-items: center;
  margin-top: 0.5rem;
  padding: 2.5rem 3rem 2.5rem 0;
  background-color: var(--ink-900);
  color: var(--text-on-dark);
  border-radius: var(--radius-sm);
}

.book-end__num {
  text-align: center;
}

.book-end__title {
  font-size: clamp(1.375rem, 2.2vw, 1.625rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.book-end__text {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--muted-on-dark);
  max-width: 560px;
}

.book-end__meta {
  margin-top: 0.625rem;
  font-size: 0.8125rem;
  color: var(--cream-100);
}

.book-dock {
  display: none;
}

/* ── TABLET ── */

@media (max-width: 1100px) {
  .book-hero__inner {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 2.5rem;
  }

  .book-cover {
    width: 230px;
  }

  .book-cover__title {
    font-size: 1rem;
  }

  .book-stats__grid {
    grid-template-columns: 1fr 1fr;
  }

  .book-stats__item:nth-child(3) {
    border-left: 0;
    padding-left: 0;
  }

  .book-stats__item:nth-child(n+3) {
    border-top: 1px solid var(--ink-700);
  }

  .book-walk__head {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .book-chapter {
    grid-template-columns: 80px minmax(0, 1fr);
    gap: 1rem 2rem;
  }

  .book-chapter__key {
    grid-column: 2;
  }

  .book-end {
    grid-template-columns: 80px minmax(0, 1fr);
    gap: 1rem 2rem;
    padding-right: 2rem;
  }

  .book-end .btn {
    grid-column: 2;
    justify-self: start;
  }
}

/* ── PHONE ── */

@media (max-width: 640px) {
  .book-hero__photo {
    inset: 0;
    opacity: 0.35;
  }

  .book-hero__photo::after {
    background: linear-gradient(180deg, rgba(26, 26, 26, 0.55) 0%, var(--ink-900) 85%);
  }

  .book-hero__inner {
    grid-template-columns: 1fr;
    gap: 0;
    padding-block: 1.75rem 2.5rem;
  }

  /* Cover sits above the heading */
  .book-cover {
    order: -1;
    width: 150px;
    margin: 0 0 1.75rem;
    transform: none;
  }

  .book-cover__spine { left: -10px; width: 10px; }
  .book-cover__face { padding: 16px 14px; }
  .book-cover__eyebrow { font-size: 7px; }
  .book-cover__rule { margin-block: 10px; width: 28px; }
  .book-cover__kicker { font-size: 8px; }
  .book-cover__title { font-size: 11px; margin-top: 4px; }
  .book-cover__authors { font-size: 8px; }
  .book-cover__rails { display: none; }

  .book-hero__title { margin-bottom: 1.25rem; }
  .book-hero__name { font-size: 1.0625rem; }
  .book-hero__authors { font-size: 0.875rem; margin-bottom: 1.75rem; }

  .book-hero__actions {
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
  }

  .book-hero__actions .book-link {
    align-self: flex-start;
  }

  .book-stats__item {
    padding: 1.5rem 0.75rem 1.625rem 1rem;
  }

  .book-stats__item:nth-child(odd) {
    padding-left: 0;
  }

  .book-stats__item dd {
    font-size: 0.8125rem;
  }

  .book-walk {
    padding-block: 3.5rem 2.5rem;
  }

  .book-walk__quote blockquote {
    font-size: 1.0625rem;
  }

  .book-walk__head {
    margin-bottom: 2.25rem;
  }

  .book-chapter {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    padding-block: 2rem;
  }

  .book-chapter__key {
    grid-column: 1;
    padding: 1.25rem;
  }

  .book-end {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    padding: 1.75rem 1.25rem;
  }

  .book-end__num {
    text-align: left;
  }

  .book-end .btn {
    grid-column: 1;
    justify-self: stretch;
    margin-top: 0.5rem;
  }

  /* Download bar pinned to the bottom of the viewport */
  .book-dock {
    display: flex;
    position: sticky;
    bottom: 0;
    z-index: 10;
    gap: 0.75rem;
    align-items: center;
    padding: 0.75rem var(--container-pad) calc(0.75rem + env(safe-area-inset-bottom));
    background-color: var(--ink-900);
    border-top: 1px solid var(--ink-700);
  }

  .book-dock__label {
    flex: 1;
    font-size: 0.75rem;
    line-height: 1.35;
    color: var(--muted-on-dark);
  }

  .book-dock__label b {
    display: block;
    color: var(--cream-100);
    font-weight: 600;
  }

  .book-dock__btn {
    min-height: 3rem;
    padding-inline: 1.25rem;
    font-size: 0.75rem;
  }
}