/* ==========================================================================
   Thư viện — dùng chung cho trang danh sách và trang bài viết
   (trang bài viết nạp đúng tệp này, xem library/show.blade.php)
   ========================================================================== */

.page-library .headerSection {
  position: relative;
  isolation: isolate;
  padding: var(--space-9) 0 var(--space-7);
  overflow: hidden;
}

.page-library .headerSection::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: var(--leaf-pattern);
  background-size: var(--leaf-pattern-size);
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.05;
  pointer-events: none;
}

.page-library .headerSection .container {
  max-width: 820px;
  text-align: center;
}

.page-library .headerSection .section-title {
  font-size: clamp(1.875rem, 1.3rem + 2.4vw, 2.5rem);
}

/* Liên kết "quay lại thư viện" ở đầu trang bài viết. */
.page-library .headerSection > .container > a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-library .headerSection > .container > a:hover {
  color: var(--brand);
  transform: translateX(-3px);
}

/* --------------------------------------------------------------------------
   Bố cục hai cột
   -------------------------------------------------------------------------- */

.page-library .blogLayout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: start;
  gap: var(--space-8);
}

.page-library .postsList {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* --------------------------------------------------------------------------
   Thẻ bài viết
   -------------------------------------------------------------------------- */

.page-library .postCard {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  overflow: hidden;
  background-color: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-library .postCard:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.page-library .postImg {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-library .postContent {
  display: flex;
  flex-direction: column;
  padding: var(--space-5);
}

/* --- Thông tin phụ -------------------------------------------------------- */

.page-library .postMeta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin-bottom: var(--space-3);
}

.page-library .category {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background-color: rgba(59, 82, 79, 0.1);
  color: var(--brand);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.03em;
}

.page-library .date {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.page-library .postTitle {
  margin-bottom: var(--space-2);
  font-size: var(--text-xl);
  transition: color var(--dur) var(--ease);
}

.page-library .postCard a:hover .postTitle {
  color: var(--primary-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-library .postExcerpt {
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--text-secondary);
}

.page-library .readMore {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: auto;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--brand);
  transition: gap var(--dur) var(--ease);
}

.page-library .readMore:hover {
  color: var(--primary-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --------------------------------------------------------------------------
   Cột bên
   -------------------------------------------------------------------------- */

.page-library .sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  /* Cột bên bám theo khi cuộn, chừa chỗ cho thanh điều hướng dính ở trên. */
  position: sticky;
  top: 100px;
}

.page-library .adBanner {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background-color: var(--surface);
  color: var(--brand);
  box-shadow: var(--shadow);
}

.page-library .adBanner h2 {
  margin-bottom: var(--space-2);
  font-size: var(--text-lg);
  color: var(--brand);
}

.page-library .adBanner p {
  margin-bottom: var(--space-5);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--text-secondary);
}

/* Shared primary button colors on the logo background. */
.page-library .adBanner .btn-primary {
  width: 100%;
}

.page-library .categoriesWidget {
  padding: var(--space-6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background-color: var(--surface);
}

.page-library .categoriesWidget h2 {
  margin-bottom: var(--space-3);
  font-size: var(--text-lg);
}

.page-library .categoriesWidget ul {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.page-library .categoriesWidget a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
  margin: 0 calc(var(--space-3) * -1);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-library .categoriesWidget a:hover {
  background-color: rgba(59, 82, 79, 0.07);
  color: var(--brand);
}

/* --------------------------------------------------------------------------
   Trang bài viết
   -------------------------------------------------------------------------- */

.page-library .postCover {
  width: 100%;
  margin-bottom: var(--space-7);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.page-library .rich-text-content {
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Điểm dừng
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .page-library .blogLayout {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .page-library .sidebar {
    position: static;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

@media (max-width: 640px) {
  .page-library .headerSection {
    padding: var(--space-7) 0 var(--space-6);
  }

  .page-library .postCard {
    grid-template-columns: 1fr;
  }

  .page-library .postImg {
    height: auto;
  }

  .page-library .sidebar {
    grid-template-columns: 1fr;
  }

  .page-library .adBanner,
  .page-library .categoriesWidget {
    padding: var(--space-5);
  }
}