/* ============================================================
   CourseMatch – Blog List Page Styles
   ============================================================ */

/* ============================================================
   LAYOUT
   ============================================================ */

.blog-container {
  width: 100%;
}

.blog-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2rem;
  align-items: start;
}

/* ============================================================
   SIDEBAR
   ============================================================ */

.blog-sidebar {
  position: sticky;
  top: calc(var(--nav-h) + 1.5rem);
}

.sidebar-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-xs);
}

.sidebar-title {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 1rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
}

.category-list {
  display: flex;
  flex-direction: column;
  gap: .25rem;
}

.category-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .55rem .75rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  color: var(--text-2);
  font-weight: 500;
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
}

.category-link:hover {
  background: var(--bg);
  color: var(--primary);
}

.category-link.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */

.blog-main {
  min-width: 0; /* prevent grid blowout */
}

/* ============================================================
   SEARCH
   ============================================================ */

.search-section {
  margin-bottom: 1.75rem;
}

.search-wrapper {
  position: relative;
}

.search-input-container {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 1rem;
  color: var(--text-3);
  pointer-events: none;
  flex-shrink: 0;
}

.search-input {
  width: 100%;
  padding: .75rem 1rem .75rem 3rem;
  font-size: .9375rem;
  font-family: inherit;
  color: var(--text-1);
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-pill);
  outline: none;
  transition: border-color var(--ease), box-shadow var(--ease);
}

.search-input::placeholder { color: var(--text-3); }

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgb(37 99 235 / .12);
}

/* Suggestions dropdown */
.search-suggestions {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 200;
  overflow: hidden;
}

.search-suggestions.hidden { display: none; }

.suggestion-item {
  padding: .75rem 1rem;
  cursor: pointer;
  transition: background var(--ease);
  border-bottom: 1px solid var(--border);
}

.suggestion-item:last-child { border-bottom: none; }

.suggestion-item:hover { background: var(--bg); }

.suggestion-title {
  font-size: .875rem;
  font-weight: 600;
  color: var(--text-1);
}

.suggestion-meta {
  font-size: .78rem;
  color: var(--text-3);
  margin-top: .2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ============================================================
   ARTICLES GRID
   ============================================================ */

.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.grid-ad {
  grid-column: 1 / -1;
  min-height: 80px;
  background: #f9f9f9;
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
}

/* ============================================================
   ARTICLE CARD
   ============================================================ */

.article-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  /* scroll-in animation initial state */
  opacity: 0;
  transform: translateY(20px);
}

.article-card.in-view {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .4s ease, transform .4s ease, box-shadow .22s ease, border-color .22s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #c7d7fe;
}

/* --- Card Image --- */
.article-image {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg);
  flex-shrink: 0;
}

.article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .4s ease;
}

.article-card:hover .article-image img { transform: scale(1.04); }

.article-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgb(15 23 42 / .25) 0%, transparent 60%);
  pointer-events: none;
}

/* --- Card Content --- */
.article-content {
  padding: 1.1rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: .55rem;
  flex: 1;
}

.article-header {
  display: flex;
  align-items: center;
  gap: .6rem;
  flex-wrap: wrap;
}

.article-category {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding: .2rem .6rem;
  border-radius: var(--radius-pill);
}

.article-date {
  font-size: .78rem;
  color: var(--text-3);
  font-weight: 500;
}

.author-link {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  transition: color var(--ease);
}

.author-link:hover { color: var(--primary-dark); }

.article-title {
  font-size: .9375rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-1);
  margin: 0;
}

.article-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--ease);
}

.article-title a:hover { color: var(--primary); }

.article-excerpt {
  font-size: .8375rem;
  color: var(--text-2);
  line-height: 1.65;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
  padding-top: .75rem;
  border-top: 1px solid var(--border);
  margin-top: auto;
  flex-wrap: wrap;
}

.article-stats {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-size: .78rem;
  color: var(--text-3);
  font-weight: 500;
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .8125rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  transition: gap var(--ease);
}

.article-link:hover { gap: .55rem; }

/* ============================================================
   PAGINATION
   ============================================================ */

.pagination-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  margin: 2rem 0 1rem;
  flex-wrap: wrap;
}

.pagination-numbers {
  display: flex;
  align-items: center;
  gap: .375rem;
  flex-wrap: wrap;
}

.pagination-number,
.pagination-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  min-width: 40px;
  height: 40px;
  padding: 0 .875rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 500;
  color: var(--text-2);
  border: 1px solid var(--border);
  background: var(--white);
  text-decoration: none;
  transition: background var(--ease), color var(--ease), border-color var(--ease), transform .15s ease;
}

.pagination-number:hover,
.pagination-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: #93c5fd;
  transform: translateY(-1px);
}

.pagination-number.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  font-weight: 700;
  box-shadow: 0 2px 8px rgb(37 99 235 / .3);
  pointer-events: none;
}

.pagination-ellipsis {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 40px;
  color: var(--text-3);
  font-size: .875rem;
}

/* ============================================================
   EMPTY / ERROR STATES
   ============================================================ */

.empty-state,
.error-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-3);
}

.empty-icon,
.error-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.empty-state h3,
.error-state h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: .5rem;
}

.empty-state p,
.error-state p {
  font-size: .9375rem;
  margin-bottom: 1.25rem;
}

/* btn re-used from index.css — keep a fallback here */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .9375rem;
  font-weight: 600;
  padding: .65rem 1.5rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(130deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 4px 14px rgb(37 99 235 / .3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgb(37 99 235 / .4);
  color: #fff;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet — collapse sidebar above grid */
@media (max-width: 860px) {
  .blog-layout {
    grid-template-columns: 1fr;
  }

  .blog-sidebar {
    position: static;
  }

  .sidebar-card {
    padding: 1rem;
  }

  .category-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: .375rem;
  }

  .category-link {
    padding: .35rem .8rem;
    font-size: .8125rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
  }

  .category-link.active {
    border-color: var(--primary);
  }
}

/* Mobile — single column cards */
@media (max-width: 600px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }

  .article-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .pagination-nav { gap: .375rem; }
  .pagination-number, .pagination-btn {
    min-width: 36px;
    height: 36px;
    font-size: .8125rem;
    padding: 0 .6rem;
  }
}