/* Unified Content Page Styles */
/* Combines blog, essays, ideas, and memos into one page with type-based filtering */

:root {
  /* ThingsAI brand color */
  --thingsai-cyan: #00CED1;
  --thingsai-cyan-dark: #00a8aa;
  
  /* Type-specific color gradients - Blue-Purple spectrum */
  /* Essays: Royal Blue | Memos: Teal | Ideas: Purple | Blog: Slate Blue */
  --essay-gradient: linear-gradient(135deg, #4169E1 0%, #2a52c7 100%);
  --essay-color: #4169E1;
  --essay-border: #2a52c7;
  
  --memo-gradient: linear-gradient(135deg, #20B2AA 0%, #1a9388 100%);
  --memo-color: #20B2AA;
  --memo-border: #1a9388;
  
  --idea-gradient: linear-gradient(135deg, #8B5CF6 0%, #7c3aed 100%);
  --idea-color: #8B5CF6;
  --idea-border: #7c3aed;
  
  --blog-gradient: linear-gradient(135deg, #6B7FD7 0%, #5668c7 100%);
  --blog-color: #6B7FD7;
  --blog-border: #5668c7;
  
  /* Light mode colors */
  --bg-light: #fafafa;
  --bg-white: #ffffff;
  --text-dark: #1a1a1a;
  --text-medium: #444;
  --text-light: #555;
  --border-light: #e0e0e0;
  --shadow-light: rgba(0, 0, 0, 0.05);
  --shadow-medium: rgba(0, 0, 0, 0.08);
  --card-bg: linear-gradient(to bottom, #ffffff 0%, #fafafa 100%);
  --filter-bg: linear-gradient(135deg, #f5f7fa 0%, #e8f4f5 100%);
  --meta-bg: rgba(0, 0, 0, 0.02);
}

/* Dark mode colors */
[data-theme="dark"] {
  --bg-light: #2d2d2d;
  --bg-white: #1a1a1a;
  --text-dark: #f0f0f0;
  --text-medium: #d8d8d8;
  --text-light: #c0c0c0;
  --border-light: #404040;
  --shadow-light: rgba(0, 0, 0, 0.3);
  --shadow-medium: rgba(0, 0, 0, 0.4);
  --card-bg: linear-gradient(to bottom, #2d2d2d 0%, #252525 100%);
  --filter-bg: linear-gradient(135deg, #2d2d2d 0%, #253335 100%);
  --meta-bg: rgba(255, 255, 255, 0.03);
}

/* Container */
.content-list {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
  padding-top: 20px;
}

.content-list h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-top: 0;
  margin-bottom: 1.5rem;
  color: var(--text-dark);
  transition: color 0.3s ease;
}

.content-list .feed-intro {
  margin: 0 0 1.5rem 0;
  max-width: none;
}

.content-intro {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* Filters */
.content-filters {
  margin: 0 0 2rem 0;
  padding: 1.5rem;
  background: var(--filter-bg);
  border-radius: 12px;
  border-left: 5px solid var(--thingsai-cyan);
  transition: background 0.3s ease;
}

.content-filters h3 {
  margin: 0 0 1rem 0;
  font-size: 1rem;
  color: var(--text-medium);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-btn {
  padding: 10px 18px;
  background-color: var(--bg-white);
  border: 2px solid #ddd;
  border-radius: 24px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
  color: var(--text-medium);
}

.filter-btn:hover {
  border-color: var(--thingsai-cyan);
  background-color: #e6fafa;
  transform: translateY(-2px);
}

.filter-btn.active {
  background: var(--thingsai-cyan);
  border-color: var(--thingsai-cyan);
  color: white;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(0, 206, 209, 0.4);
}

/* Content Grid */
.content-grid {
  display: flex;
  flex-direction: column;
  gap: 30px;
  margin-top: 0;
}

/* Content Cards */
.content-card {
  background: var(--card-bg);
  border: 2px solid var(--border-light);
  border-radius: 12px;
  padding: 25px;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  min-height: 320px;
  position: relative;
  box-shadow: 0 2px 8px var(--shadow-light);
}

.content-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow-medium);
}

/* Type-specific border colors */
.content-card[data-type="blog"] {
  border-left: 6px solid var(--blog-border);
}

.content-card[data-type="blog"]:hover {
  border-left-color: var(--blog-color);
  box-shadow: 0 8px 24px rgba(0, 206, 209, 0.25);
}

.content-card[data-type="essay"] {
  border-left: 6px solid var(--essay-border);
}

.content-card[data-type="essay"]:hover {
  border-left-color: var(--essay-color);
  box-shadow: 0 8px 24px rgba(0, 206, 209, 0.25);
}

.content-card[data-type="idea"] {
  border-left: 6px solid var(--idea-border);
}

.content-card[data-type="idea"]:hover {
  border-left-color: var(--idea-color);
  box-shadow: 0 8px 24px rgba(0, 206, 209, 0.25);
}

.content-card[data-type="memo"] {
  border-left: 6px solid var(--memo-border);
}

.content-card[data-type="memo"]:hover {
  border-left-color: var(--memo-color);
  box-shadow: 0 8px 24px rgba(0, 206, 209, 0.25);
}

/* Card Badge */
.card-badge {
  position: absolute;
  top: -10px;
  right: 20px;
  color: white;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.card-badge-essay {
  background: var(--essay-gradient);
  box-shadow: 0 4px 10px rgba(65, 105, 225, 0.4);
}

.card-badge-memo {
  background: var(--memo-gradient);
  box-shadow: 0 4px 10px rgba(32, 178, 170, 0.4);
}

.card-badge-idea {
  background: var(--idea-gradient);
  box-shadow: 0 4px 10px rgba(139, 92, 246, 0.4);
}

.card-badge-blog {
  background: var(--blog-gradient);
  box-shadow: 0 4px 10px rgba(107, 127, 215, 0.4);
}

/* Card Header */
.card-header {
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 0.75rem 0;
}

.card-title a {
  color: var(--text-dark);
  text-decoration: none;
  transition: color 0.3s ease;
}

.card-title a:hover {
  color: var(--thingsai-cyan);
}

.card-subtitle {
  font-size: 1rem;
  color: var(--text-light);
  font-style: italic;
  margin: 0 0 0.5rem 0;
}

.card-excerpt {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.6;
  margin: 0;
}

/* Card Meta */
.card-meta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--meta-bg);
  border-radius: 8px;
  font-size: 0.9rem;
  transition: background 0.3s ease;
}

.card-date,
.card-categories,
.card-domain,
.card-topic,
.card-status,
.card-reading-time {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.card-meta strong {
  font-weight: 700;
  color: var(--text-medium);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-date time {
  color: var(--text-light);
}

/* Tags */
.category-tag,
.domain-tag,
.topic-tag,
.status-tag {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
}

.category-tag {
  color: var(--blog-color);
  border-color: var(--blog-color);
}

.domain-tag {
  color: var(--idea-color);
  border-color: var(--idea-color);
}

.topic-tag {
  color: var(--memo-color);
  border-color: var(--memo-color);
}

/* Essay cards should use essay color for topic tags */
.content-card[data-type="essay"] .topic-tag {
  color: var(--essay-color);
  border-color: var(--essay-color);
}

.status-tag {
  text-transform: capitalize;
}

.status-tag.status-draft {
  color: #6B7280;
  border-color: #6B7280;
}

.status-tag.status-exploring {
  color: #3B82F6;
  border-color: #3B82F6;
}

.status-tag.status-active {
  color: #10B981;
  border-color: #10B981;
}

.status-tag.status-completed {
  color: #8B5CF6;
  border-color: #8B5CF6;
}

/* Card Link */
.card-link {
  margin-top: auto;
  display: inline-block;
  padding: 10px 20px;
  background: var(--thingsai-cyan);
  color: white;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 206, 209, 0.3);
}

.card-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 206, 209, 0.4);
  background: var(--thingsai-cyan-dark);
}

/* Type-specific link colors */
.content-card[data-type="blog"] .card-link {
  background: var(--blog-gradient);
  box-shadow: 0 2px 8px rgba(0, 206, 209, 0.3);
}

.content-card[data-type="blog"] .card-link:hover {
  box-shadow: 0 4px 16px rgba(0, 206, 209, 0.4);
}

.content-card[data-type="essay"] .card-link {
  background: var(--essay-gradient);
  box-shadow: 0 2px 8px rgba(0, 206, 209, 0.3);
}

.content-card[data-type="essay"] .card-link:hover {
  box-shadow: 0 4px 16px rgba(0, 206, 209, 0.4);
}

.content-card[data-type="idea"] .card-link {
  background: var(--idea-gradient);
  box-shadow: 0 2px 8px rgba(0, 206, 209, 0.3);
}

.content-card[data-type="idea"] .card-link:hover {
  box-shadow: 0 4px 16px rgba(0, 206, 209, 0.4);
}

.content-card[data-type="memo"] .card-link {
  background: var(--memo-gradient);
  box-shadow: 0 2px 8px rgba(0, 206, 209, 0.3);
}

.content-card[data-type="memo"] .card-link:hover {
  box-shadow: 0 4px 16px rgba(0, 206, 209, 0.4);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-light);
  font-size: 1.1rem;
  background: var(--bg-light);
  border-radius: 12px;
  border: 2px dashed var(--border-light);
}

/* Responsive Design */
@media (max-width: 768px) {
  .content-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .content-list h1 {
    font-size: 2rem;
  }
  
  .content-intro {
    font-size: 1rem;
  }
  
  .filter-buttons {
    gap: 8px;
  }
  
  .filter-btn {
    padding: 8px 14px;
    font-size: 13px;
  }
  
  .content-card {
    min-height: 280px;
    padding: 20px;
  }
  
  .card-title {
    font-size: 1.25rem;
  }
  
  .card-badge {
    top: -8px;
    right: 15px;
    padding: 5px 12px;
    font-size: 10px;
  }
}

@media (max-width: 480px) {
  .content-list {
    padding: 15px;
  }
  
  .content-filters {
    padding: 1rem;
  }
  
  .filter-btn {
    flex: 1 1 auto;
    min-width: 80px;
  }
  
  .card-meta {
    font-size: 0.85rem;
  }
}

/* Print styles */
@media print {
  .content-filters,
  .card-link {
    display: none;
  }
  
  .content-grid {
    display: block;
  }
  
  .content-card {
    page-break-inside: avoid;
    margin-bottom: 1rem;
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

/* Accessibility */
.filter-btn:focus,
.card-link:focus {
  outline: 3px solid #667eea;
  outline-offset: 2px;
}

.card-title a:focus {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .content-card,
  .filter-btn,
  .card-link,
  .card-title a {
    transition: none;
  }
  
  .content-card:hover,
  .filter-btn:hover,
  .card-link:hover {
    transform: none;
  }
}