/* ============================================================
   KİTAP SAYFASI — "Kitabı Satın Al"
============================================================ */
body.page-book {
  background: var(--bg);
  overflow-x: hidden;
}

.static-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 9, 12, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
}

.book-page {
  padding-top: 2rem;
}

/* --- hero / product --- */
.book-hero {
  padding: 4rem 6vw 5rem;
}
.book-hero-grid {
  display: grid;
  grid-template-columns: minmax(260px, 380px) 1fr;
  gap: 4rem;
  max-width: 1160px;
  margin: 0 auto;
  align-items: start;
}
.book-hero-media {
  position: relative;
}
.book-hero-media img {
  width: 100%;
  display: block;
  border-radius: 6px;
  border: 1px solid var(--card-border);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5);
}
.stock-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid var(--accent);
  box-shadow: var(--accent-glow);
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
}

.book-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
  margin-top: 0.8rem;
}
.book-lede {
  margin-top: 1.2rem;
  color: var(--text);
  max-width: 56ch;
  font-size: 1.02rem;
}

.book-price-row {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}
.book-price-old {
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-decoration: line-through;
  font-size: 1rem;
}
.book-price-new {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2.2rem;
  color: var(--heading);
}
.book-discount {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--amber);
  padding: 0.3rem 0.6rem;
  border-radius: 3px;
}

.book-cta-row {
  display: flex;
  gap: 1rem;
  margin-top: 1.8rem;
  flex-wrap: wrap;
}
.book-cta-primary,
.book-cta-secondary {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 1rem 1.6rem;
  border-radius: 2px;
  white-space: nowrap;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}
.book-cta-primary {
  color: var(--bg);
  background: var(--accent);
  box-shadow: var(--accent-glow);
}
.book-cta-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--accent-glow-lg);
}
.book-cta-secondary {
  color: var(--text);
  background: transparent;
  border: 1px solid var(--card-border);
}
.book-cta-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.book-feature-list {
  margin-top: 2.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  list-style: none;
  padding: 0;
}
.book-feature-list li {
  font-size: 0.88rem;
  color: var(--text-dim);
  padding-left: 1.4rem;
  position: relative;
}
.book-feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: var(--accent-glow);
}

/* --- content details --- */
.book-details {
  padding: 5rem 6vw;
  background: var(--card);
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
}
.book-details-inner {
  max-width: 1160px;
  margin: 0 auto;
  text-align: center;
}
.book-topics-grid {
  margin-top: 2.6rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1.2rem;
  text-align: left;
}
.book-topic {
  background: var(--bg);
  border: 1px solid var(--card-border);
  border-left: 2px solid var(--accent);
  padding: 1.3rem 1.5rem;
}
.book-topic h3 {
  font-family: var(--font-body);
  font-weight: 700;
  color: var(--heading);
  font-size: 1rem;
}
.book-topic p {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* --- final CTA --- */
.book-cta-final {
  padding: 6rem 6vw;
  text-align: center;
  max-width: 620px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}
.book-cta-final .badge {
  display: inline-block;
  margin-bottom: 0.4rem;
}
.book-cta-final .book-cta-primary { margin-top: 1rem; }

@media (max-width: 900px) {
  .book-hero-grid { grid-template-columns: 1fr; gap: 2.6rem; }
  .book-hero-media img { max-width: 340px; margin: 0 auto; display: block; }
}