.bmp-back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--blue);
  text-decoration: none;
  margin-bottom: 24px;
}

.bmp-back-link:hover { text-decoration: underline; }


.bmp-title { 
  font-size: 32px; 
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.3;
  margin: 0;
  color: var(--ivory);
}


.bmp-hero {
  padding: 60px 0 50px !important;
  background: linear-gradient(135deg, #022b5c 0%, #034694 100%);
  position: relative;
  overflow: hidden;
}

.bmp-hero-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  align-items: flex-start;
}

.bmp-hero-left {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

.bmp-hero-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
  justify-content: flex-end;
  padding-top: 4px;
}


.bmp-cover {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 2 / 3;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--cream2);
  box-shadow: 
    0 10px 25px rgba(0,0,0,0.3),
    0 3px 10px rgba(0,0,0,0.2);
  border: none;
  padding: 0;
  transition: transform 0.25s cubic-bezier(.34,1.56,.64,1), box-shadow 0.25s ease;
}

.bmp-cover-clickable { cursor: zoom-in; }

.bmp-cover-clickable:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 
    0 20px 35px rgba(0,0,0,0.4),
    0 5px 15px rgba(0,0,0,0.25);
}

.bmp-cover img { 
  width: 100%; 
  height: 100%; 
  object-fit: cover; 
  display: block; 
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}

.bmp-cover-zoom-hint {
  position: absolute;
  right: 10px;
  bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(3,70,148,0.85);
  color: var(--ivory);
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.2s ease, transform 0.2s cubic-bezier(.34,1.56,.64,1);
  backdrop-filter: blur(4px);
}

.bmp-cover-clickable:hover .bmp-cover-zoom-hint { opacity: 1; transform: scale(1); }

.bmp-cover-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: var(--mid);
}


.bmp-fulltext-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--blue, #034694);
  background: var(--yellow, #FFDE00);
  text-decoration: none;
  padding: 12px 18px;
  border-radius: var(--r-md, 8px);
  box-shadow: 0 4px 15px rgba(0,0,0,0.25);
  transition: transform 0.25s cubic-bezier(.34,1.56,.64,1), box-shadow 0.25s ease, background-color 0.25s;
  border: none;
  width: 100%;
}

.bmp-fulltext-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(255, 222, 0, 0.35);
  background: #ffe633;
  color: var(--blue, #034694);
}

.bmp-fulltext-btn:active {
  transform: translateY(0);
}


.bmp-detail-section {
  padding-top: 40px !important;
  background: var(--cream, #F5F0E8);
}

.bmp-layout-full {
  width: 100%;
}

.bmp-main {
  max-width: 100%;
}


.bmp-meta-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px 24px;
  margin-top: 24px;
  margin-bottom: 0;
  padding: 24px;
  background: var(--paper); 
  border: 1px solid var(--cream3);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-rest);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.bmp-meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--cream2); 
}


.bmp-meta-item--penulis {
  grid-column: span 12;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--cream3);
}

.bmp-meta-item--penulis strong {
  font-size: 16px !important;
  font-weight: 700 !important;
  line-height: 1.5;
  color: var(--dark);
  letter-spacing: 0.01em;
}


.bmp-meta-item--edisi { grid-column: span 2; }
.bmp-meta-item--sks { grid-column: span 2; }
.bmp-meta-item--modul { grid-column: span 2; }
.bmp-meta-item--tahun-terbit { grid-column: span 3; }
.bmp-meta-item--kelas-ddc { grid-column: span 3; }


.bmp-meta-item--halaman { grid-column: span 6; }
.bmp-meta-item--isbn { grid-column: span 6; }
.bmp-meta-item--isbn-elektronik { grid-column: span 6; }
.bmp-meta-item--penerbit { grid-column: span 6; }
.bmp-meta-item--kota-terbit { grid-column: span 6; }


.bmp-meta-item span {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em; 
  color: var(--mid); 
  font-weight: 700;
  font-family: var(--font-display);
}


.bmp-meta-item strong {
  font-size: 13.5px;
  color: var(--text);
  line-height: 1.4;
  font-weight: 600;
}


@media (max-width: 991px) {
  .bmp-meta-item--edisi,
  .bmp-meta-item--sks,
  .bmp-meta-item--modul {
    grid-column: span 4;
  }
  .bmp-meta-item--tahun-terbit,
  .bmp-meta-item--kelas-ddc {
    grid-column: span 6;
  }
  .bmp-meta-item--halaman,
  .bmp-meta-item--isbn,
  .bmp-meta-item--isbn-elektronik,
  .bmp-meta-item--penerbit,
  .bmp-meta-item--kota-terbit {
    grid-column: span 6;
  }
}

@media (max-width: 576px) {
  .bmp-meta-grid {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 16px 0 0;
  }
  .bmp-meta-item {
    grid-column: span 1 !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
}


.bmp-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.3s ease, visibility 0.3s;
}

.bmp-lightbox.active { visibility: visible; opacity: 1; }

.bmp-lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(13,27,42,0.8);
}

.bmp-lightbox-img {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: contain;
  max-width: min(560px, 90vw);
  max-height: 85vh;
  border-radius: var(--r-lg);
  box-shadow: 0 40px 100px rgba(0,0,0,0.5);
  transform: scale(0.94);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
  user-select: none;
  -webkit-user-drag: none;
}

.bmp-lightbox.active .bmp-lightbox-img { transform: scale(1); }

.bmp-lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  z-index: 1;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(240,230,210,0.15);
  border: 1.5px solid rgba(240,230,210,0.3);
  border-radius: 50%;
  color: var(--ivory);
  cursor: pointer;
  transition: background 0.15s;
}

.bmp-lightbox-close:hover { background: rgba(240,230,210,0.28); }




.bmp-deskripsi { margin-bottom: 32px; }
.bmp-deskripsi h2 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--blue);
  margin: 0 0 12px;
}
.bmp-deskripsi p { font-size: 14px; line-height: 1.75; color: var(--dark); margin: 0; }

.bmp-pdf-tabs { margin-bottom: 28px; }

.bmp-pdf-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--blue);
  text-decoration: none;
  padding: 12px 20px;
  border: 1.5px solid var(--blue);
  border-radius: var(--r-md);
  margin-top: 16px;
  transition: background 0.15s, color 0.15s;
}

.bmp-pdf-link:hover { background: var(--blue); color: var(--ivory); }