/* ============================================================
   eStore Books — Book Detail Page CSS
   assets/css/book.css
   ============================================================ */

/* ---- Layout ---------------------------------------------- */
.book-detail-layout {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 56px;
  padding-top: 32px;
  padding-bottom: 48px;
  align-items: start;
}

/* ---- Gallery --------------------------------------------- */
.book-gallery { position: sticky; top: calc(var(--header-h) + 16px); }

.gallery-main {
  position: relative;
  background: var(--paper-warm);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 3/4;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}
.gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 12px;
  transition: opacity .2s;
}
.gallery-placeholder {
  font-size: 80px;
  color: var(--faint);
}
.detail-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 99px;
  font-weight: 500;
}
.detail-badge.digital { background: var(--warm); color: var(--ink); }
.detail-badge.both    { background: var(--gold); color: var(--ink); }

.gallery-thumbs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.thumb {
  width: 60px;
  height: 80px;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-warm);
  cursor: pointer;
  padding: 0;
  transition: border-color .15s;
  flex-shrink: 0;
}
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb.active  { border-color: var(--warm-deep); }
.thumb:hover   { border-color: var(--warm); }

/* ---- Book info ------------------------------------------- */
.book-detail-cat {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--warm-deep);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 10px;
}
.book-detail-cat:hover { color: var(--ink); }

.book-detail-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 400;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 8px;
}
.book-detail-author {
  font-size: 16px;
  color: var(--muted);
  margin-bottom: 20px;
  font-style: italic;
}
.book-detail-author a { color: var(--muted); border-bottom: 1px solid var(--border); }
.book-detail-author a:hover { color: var(--ink); }

/* ---- Price ----------------------------------------------- */
.book-detail-price {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}
.price-amount {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 500;
  color: var(--ink);
}
.price-note {
  font-size: 13px;
  color: var(--muted);
  background: var(--paper-warm);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 99px;
}

/* ---- Stock badge ----------------------------------------- */
.stock-info  { margin-bottom: 20px; }
.stock-badge {
  display: inline-block;
  font-size: 13px;
  padding: 5px 12px;
  border-radius: 99px;
  font-weight: 500;
}
.in-stock  { background: #d1fae5; color: #065f46; }
.low-stock { background: #fef3c7; color: #92400e; }
.out-stock { background: #fee2e2; color: #9b1c1c; }

/* ---- Add to cart row ------------------------------------- */
.add-cart-row {
  display: flex;
  gap: 12px;
  align-items: stretch;
  margin-bottom: 14px;
}
.qty-control {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  flex-shrink: 0;
}
.qty-control button {
  width: 38px;
  height: 100%;
  background: var(--paper-warm);
  border: none;
  font-size: 18px;
  color: var(--ink);
  cursor: pointer;
  transition: background .1s;
}
.qty-control button:hover { background: var(--cream); }
.qty-control input {
  width: 44px;
  text-align: center;
  border: none;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ink);
  background: var(--white);
  outline: none;
  -moz-appearance: textfield;
}
.qty-control input::-webkit-outer-spin-button,
.qty-control input::-webkit-inner-spin-button { -webkit-appearance: none; }

.add-to-cart-btn { flex: 1; font-size: 16px; }
.add-to-cart-btn:disabled { background: var(--faint); cursor: not-allowed; }

/* ---- Wishlist -------------------------------------------- */
.wishlist-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 18px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
  transition: all .15s;
  margin-bottom: 24px;
}
.wishlist-btn:hover  { border-color: #e57373; color: #c62828; }
.wishlist-btn.active { border-color: #e57373; color: #c62828; background: #fef2f2; }

/* ---- Specs ----------------------------------------------- */
.specs-block  { margin-bottom: 20px; }
.specs-title  { font-size: 14px; font-weight: 500; color: var(--muted); letter-spacing: .04em; text-transform: uppercase; margin-bottom: 10px; }
.specs-table  { width: 100%; border-collapse: collapse; font-size: 14px; }
.specs-table td { padding: 8px 12px; border-bottom: 1px solid var(--border-soft); }
.specs-table td:first-child { color: var(--muted); width: 120px; font-size: 13px; }
.specs-table td:last-child  { color: var(--ink); font-weight: 500; }

/* ---- Shipping pill --------------------------------------- */
.shipping-info {
  background: var(--paper-warm);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--muted);
}

/* ---- Tabs ------------------------------------------------ */
.book-content-section {
  padding-top: 0;
  padding-bottom: 48px;
  border-top: 1px solid var(--border-soft);
}
.book-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-soft);
  margin-bottom: 28px;
}
.tab-btn {
  background: none;
  border: none;
  padding: 14px 24px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color .15s, border-color .15s;
}
.tab-btn:hover  { color: var(--ink); }
.tab-btn.active { color: var(--ink); border-bottom-color: var(--warm-deep); font-weight: 500; }

.tab-content { }
.desc-short { font-size: 17px; color: var(--ink-light); line-height: 1.8; margin-bottom: 20px; font-style: italic; }
.desc-full  { font-size: 15px; color: var(--ink-light); line-height: 1.9; }
.desc-full p + p { margin-top: 14px; }

.shipping-tab   { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.ship-item      { padding: 20px; background: var(--paper-warm); border: 1px solid var(--border-soft); border-radius: var(--radius-lg); }
.ship-item h4   { font-family: var(--font-display); font-size: 16px; font-weight: 500; margin-bottom: 8px; }
.ship-item p    { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* ---- Responsive ------------------------------------------ */
@media (max-width: 900px) {
  .book-detail-layout { grid-template-columns: 1fr; gap: 32px; }
  .book-gallery       { position: static; }
  .gallery-main       { aspect-ratio: 1/1; max-height: 400px; }
}
@media (max-width: 480px) {
  .add-cart-row { flex-wrap: wrap; }
  .add-to-cart-btn { width: 100%; }
}