/* ===== ENCYCLOPEDIA INDEX PAGE STYLES ===== */

/* Hero */
.encyclopedia-hero {
  padding: 120px 0 60px;
  text-align: center;
  position: relative;
}

.encyclopedia-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse at center, rgba(66, 133, 244, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.encyclopedia-hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.encyclopedia-hero h1 .gradient {
  background: linear-gradient(135deg, #4285f4, #34a853, #ea4335);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.encyclopedia-hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

.encyclopedia-hero .subtitle {
  font-size: 15px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* Category Cards */
.encyclopedia-categories {
  padding: 0 0 48px;
}

.encyclopedia-categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.encyclopedia-category-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 28px 20px 24px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: block;
}

.encyclopedia-category-card:hover {
  border-color: var(--accent-blue);
  box-shadow: 0 4px 20px rgba(66, 133, 244, 0.1);
  transform: translateY(-3px);
}

.encyclopedia-category-card.active {
  border-color: var(--accent-blue);
  box-shadow: 0 8px 32px rgba(66, 133, 244, 0.15);
}

.encyclopedia-category-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

.encyclopedia-category-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.encyclopedia-category-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

.encyclopedia-category-count {
  font-size: 13px;
  color: var(--accent-blue);
  font-weight: 500;
  margin-top: 8px;
}

/* Search Bar */
.encyclopedia-search-section {
  padding: 0 0 32px;
}

.encyclopedia-search-bar {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.encyclopedia-search-bar::before {
  content: '🔍';
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  z-index: 1;
  pointer-events: none;
}

.encyclopedia-search-bar input {
  width: 100%;
  padding: 16px 20px 16px 52px;
  border-radius: 14px;
  border: 2px solid var(--border-color);
  background: var(--bg-card);
  font-size: 15px;
  color: var(--text-primary);
  outline: none;
  transition: all 0.3s ease;
  box-sizing: border-box;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.encyclopedia-search-bar input:hover {
  border-color: rgba(66, 133, 244, 0.3);
}

.encyclopedia-search-bar input:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 4px rgba(66, 133, 244, 0.12), 0 2px 12px rgba(66,133,244,0.08);
}

.encyclopedia-search-bar input::placeholder {
  color: var(--text-muted);
  font-size: 14px;
}

/* Search hint text */
.encyclopedia-search-hint {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* Filter count badge */
.encyclopedia-filter-btn .filter-count {
  display: inline-block;
  background: var(--bg-secondary);
  border-radius: 10px;
  padding: 0 6px;
  font-size: 11px;
  margin-left: 4px;
  color: var(--text-muted);
}

.encyclopedia-filter-btn.active .filter-count {
  background: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.9);
}

/* Read time in card */
.encyclopedia-readtime {
  font-size: 12px;
  color: var(--text-muted);
}

/* Filter Bar */
.encyclopedia-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.03);
}

.encyclopedia-filter-btn {
  padding: 7px 16px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.encyclopedia-filter-btn:hover {
  border-color: var(--accent-blue);
  color: var(--accent-blue);
  background: rgba(66, 133, 244, 0.04);
}

.encyclopedia-filter-btn.active {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
  box-shadow: 0 2px 8px rgba(66, 133, 244, 0.25);
}

/* Entry Grid */
.encyclopedia-section {
  padding: 0 0 80px;
}

.encyclopedia-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

/* Entry Card */
.encyclopedia-entry-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 20px 24px;
  text-decoration: none;
  display: block;
  transition: all 0.3s ease;
}

.encyclopedia-entry-card:hover {
  border-color: var(--accent-blue);
  box-shadow: 0 4px 16px rgba(66, 133, 244, 0.08);
  transform: translateY(-2px);
}

.encyclopedia-entry-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.encyclopedia-type-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
}

.badge-concept { background: rgba(66, 133, 244, 0.12); color: #4285f4; }
.badge-protocol { background: rgba(52, 168, 83, 0.12); color: #34a853; }
.badge-arch { background: rgba(251, 188, 4, 0.12); color: #b08a00; }
.badge-security { background: rgba(234, 67, 53, 0.12); color: #d93025; }
.badge-bench { background: rgba(147, 52, 230, 0.12); color: #9334e6; }
.badge-framework { background: rgba(0, 150, 136, 0.12); color: #00897b; }
.badge-ecosystem { background: rgba(255, 112, 67, 0.12); color: #e64a19; }

.encyclopedia-entry-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  line-height: 1.4;
}

.encyclopedia-entry-card-aliases {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.encyclopedia-entry-card-aliases span {
  background: var(--bg-secondary);
  padding: 1px 6px;
  border-radius: 4px;
  margin-right: 4px;
  font-size: 12px;
}

.encyclopedia-entry-card-abstract {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.encyclopedia-entry-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.encyclopedia-read {
  font-size: 14px;
  color: var(--accent-blue);
  font-weight: 500;
}

.encyclopedia-keypoints-preview {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.encyclopedia-keypoint-tag {
  font-size: 12px;
  color: var(--text-muted);
  padding: 2px 8px;
  background: var(--bg-secondary);
  border-radius: 4px;
}

/* Empty state */
.encyclopedia-empty {
  text-align: center;
  padding: 80px 20px;
}

.encyclopedia-empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.encyclopedia-empty-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.encyclopedia-empty-desc {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 400px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ===== ENCYCLOPEDIA DETAIL PAGE ===== */

.encyclopedia-article {
  max-width: 820px;
  margin: 0 auto;
  padding: 100px 24px 60px;
}

.encyclopedia-article-header {
  margin-bottom: 32px;
}

.encyclopedia-article .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.encyclopedia-article .breadcrumb a {
  color: var(--accent-blue);
  text-decoration: none;
}

.encyclopedia-article .breadcrumb a:hover {
  text-decoration: underline;
}

.encyclopedia-article h1 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.encyclopedia-article .aliases {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.encyclopedia-article .aliases span {
  background: var(--bg-secondary);
  padding: 3px 10px;
  border-radius: 4px;
  margin-right: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}

.encyclopedia-article .meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 13px;
  color: var(--text-muted);
  align-items: center;
}

.encyclopedia-article .definition-box {
  background: linear-gradient(135deg, rgba(66, 133, 244, 0.04) 0%, rgba(52, 168, 83, 0.04) 100%);
  border-left: 4px solid var(--accent-blue);
  padding: 24px 28px;
  border-radius: 0 12px 12px 0;
  margin-bottom: 36px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-primary);
}

.encyclopedia-article .section-title {
  font-size: 22px;
  font-weight: 700;
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-color);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* Rich text paragraphs */
.encyclopedia-article .section-body {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.encyclopedia-article .section-body p {
  margin-bottom: 14px;
}

.encyclopedia-article .section-body strong {
  color: var(--text-primary);
}

/* Inline code */
.encyclopedia-article .section-body code {
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 13px;
  color: var(--accent-red);
}

.keypoint-list {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
}

.keypoint-list li {
  padding: 14px 18px;
  margin-bottom: 10px;
  background: var(--bg-secondary);
  border-radius: 10px;
  font-size: 14px;
  line-height: 1.7;
  position: relative;
  padding-left: 42px;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  transition: all 0.2s;
}

.keypoint-list li:hover {
  border-color: var(--accent-blue);
  background: rgba(66, 133, 244, 0.03);
}

.keypoint-list li::before {
  content: '✦';
  position: absolute;
  left: 16px;
  font-size: 14px;
  color: var(--accent-blue);
}

/* Related links */
.encyclopedia-article .related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 32px;
}

.encyclopedia-article .related-links a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 13px;
  color: var(--accent-blue);
  text-decoration: none;
  transition: all 0.2s;
  white-space: nowrap;
}

.encyclopedia-article .related-links a:hover {
  border-color: var(--accent-blue);
  background: rgba(66, 133, 244, 0.06);
  box-shadow: var(--shadow-sm);
}

/* Article footer */
.encyclopedia-article .article-footer {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Info table for structured data */
.encyclopedia-article .info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 28px;
  font-size: 14px;
}

.encyclopedia-article .info-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-color);
}

.encyclopedia-article .info-table td:first-child {
  font-weight: 600;
  color: var(--text-primary);
  width: 120px;
  white-space: nowrap;
}

.encyclopedia-article .info-table td:last-child {
  color: var(--text-secondary);
}

/* ===== NEW ENHANCED COMPONENTS ===== */

/* Table of Contents */
.encyclopedia-toc {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 32px;
}

.encyclopedia-toc .toc-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.encyclopedia-toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.encyclopedia-toc li {
  margin-bottom: 6px;
}

.encyclopedia-toc li a {
  color: var(--accent-blue);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.6;
}

.encyclopedia-toc li a:hover {
  text-decoration: underline;
}

/* Section blocks */
.section-block {
  margin-bottom: 8px;
}

/* Application cards grid */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin: 16px 0 28px;
}

.app-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 18px 20px;
  transition: all 0.2s;
}

.app-card:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-sm);
}

.app-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.app-card-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Best practice list */
.best-practice-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 28px;
}

.best-practice-list li {
  padding: 12px 18px 12px 36px;
  margin-bottom: 8px;
  background: var(--bg-secondary);
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  position: relative;
}

.best-practice-list li::before {
  content: '✓';
  position: absolute;
  left: 14px;
  color: #34a853;
  font-weight: 700;
}

/* Tag section */
.tag-section {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.tag-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
  margin-right: 4px;
}

.tag-item {
  display: inline-block;
  padding: 3px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

/* Related links with category badges */
.rel-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  font-size: 10px;
  margin-right: 2px;
}

/* Info table on detail page */
.encyclopedia-article .info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 24px;
  font-size: 14px;
  background: var(--bg-secondary);
  border-radius: 10px;
  overflow: hidden;
}

.encyclopedia-article .info-table td {
  padding: 8px 16px;
  border-bottom: 1px solid var(--border-color);
}

.encyclopedia-article .info-table tr:last-child td {
  border-bottom: none;
}

.encyclopedia-article .info-table td:first-child {
  font-weight: 600;
  color: var(--text-primary);
  width: 100px;
  white-space: nowrap;
}

.encyclopedia-article .info-table td:last-child {
  color: var(--text-secondary);
}

/* Scroll-to-top */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-blue);
  color: #fff;
  border: none;
  font-size: 20px;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: 100;
  transition: all 0.3s;
}

.scroll-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

/* Responsive */

/* Tablet: 2 columns */
@media (max-width: 1024px) {
  .encyclopedia-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile: 1 column */
@media (max-width: 640px) {
  .encyclopedia-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .encyclopedia-categories-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .encyclopedia-article {
    padding: 80px 16px 40px;
  }

  .encyclopedia-article h1 {
    font-size: 26px;
  }

  .encyclopedia-article .definition-box {
    padding: 18px 20px;
    font-size: 15px;
  }

  .encyclopedia-article .info-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .encyclopedia-article .info-table td:first-child {
    width: 80px;
  }
}