/* Halaman publik: Buku Saku dan Nomor Penting */
.public-page {
  min-height: calc(100vh - 90px);
  padding: 56px 0 72px;
}

.public-shell {
  max-width: 1240px;
  margin: 0 auto;
}

.public-heading {
  margin-bottom: 32px;
}

/* Menjaga navigasi dan unduhan PDF berada di sisi kanan pada setiap halaman buku. */
.public-heading.d-flex > :first-child {
  flex: 1 1 0;
  min-width: 0;
}

.public-heading.d-flex > .public-back,
.public-heading-actions {
  margin-left: auto;
  flex: 0 0 auto;
}

.public-heading h1 {
  font-size: clamp(30px, 4vw, 42px);
  color: #102a5c;
  font-weight: 800;
}

.public-heading p {
  color: #64748b;
  font-size: 16px;
  margin-top: 6px;
}

.public-back {
  border: 1px solid #cbd5e1;
  background: #fff;
  color: #334155;
  border-radius: 10px;
  padding: 10px 18px;
  font-weight: 600;
}

.public-back:hover {
  color: #0756d9;
  border-color: #0756d9;
}

.public-card {
  background: rgba(255, 255, 255, .96);
  border: 1px solid rgba(226, 232, 240, .95);
  border-radius: 20px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, .10);
}

.public-card .card-body {
  padding: 28px;
}

.public-choice-card {
  min-height: 315px;
  transition: transform .2s ease, box-shadow .2s ease;
}

.public-choice-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 30px rgba(15, 23, 42, .15);
}

.public-icon {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: #edf3ff;
  color: #1468ee;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  margin-bottom: 22px;
}

.public-icon.pdf {
  color: #df3449;
  background: #fff0f2;
}

.public-title {
  font-size: 24px;
  color: #142950;
  font-weight: 800;
}

.public-description {
  color: #64748b;
  font-size: 16px;
  line-height: 1.65;
}

.public-primary {
  border: 0;
  background: #1468ee;
  color: #fff;
  border-radius: 10px;
  padding: 11px 22px;
  font-weight: 700;
}

.public-primary:hover {
  background: #0756d9;
  color: #fff;
}

.public-danger {
  background: #df3449;
}

.public-danger:hover {
  background: #c4273a;
}

.public-search {
  background: #fff;
  border: 1px solid #dce5f1;
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 6px 18px rgba(15, 23, 42, .05);
}

.public-search .form-control {
  min-height: 48px;
  border-radius: 10px;
}

.book-pdf-card {
  min-height: 375px;
}

.book-pdf-card .file-meta {
  color: #64748b;
  font-size: 14px;
}

.category-card {
  min-height: 225px;
}

.material-card {
  min-height: 220px;
}

.contact-stat {
  min-height: 120px;
}

.contact-card {
  min-height: 280px;
}

.contact-number {
  color: #168a50;
  font-size: 24px;
  font-weight: 800;
}

.content-card {
  background: rgba(255, 255, 255, .97);
  border: 1px solid #e1e8f2;
  border-radius: 18px;
  box-shadow: 0 8px 22px rgba(15, 23, 42, .08);
}

.content-card .card-body {
  padding: 30px;
}

.materi-content {
  color: #334155;
  font-size: 16px;
  line-height: 1.9;
  text-align: justify;
}

.materi-content p {
  margin-bottom: 14px;
}

.materi-content img {
  max-width: 100%;
  height: auto;
}

.materi-content table {
  width: 100%;
  margin: 15px 0;
}

.pdf-preview {
  min-height: 680px;
  border: 0;
  width: 100%;
}

@media(max-width:768px) {
  .public-page {
    padding: 34px 16px 54px;
  }

  .public-card .card-body {
    padding: 22px
  }

  .pdf-preview {
    min-height: 480px
  }

  .public-heading h1 {
    font-size: 30px
  }

  .public-heading-actions {
    width: 100%;
    justify-content: flex-end;
  }
}