/* ========================================================
   Resources Center - Phase 4
   依存 style.css 的變數與基礎樣式
   ======================================================== */

/* ===== Header ===== */
.rc-header .header-inner {
  padding-top: 10px;
  padding-bottom: 10px;
}

.rc-header-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.rc-back {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-size: 0.88rem;
  padding: 4px 8px;
  border-radius: 6px;
  transition: background 0.15s;
}
.rc-back:hover { background: rgba(255, 255, 255, 0.15); }

.rc-title {
  flex: 1;
  text-align: center;
  font-size: 1.05rem;
  margin-bottom: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rc-user {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.85);
  white-space: nowrap;
  max-width: 90px;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== Filter Panel ===== */
.rc-filter {
  padding: 16px;
}

.rc-filter-row {
  margin-bottom: 14px;
}
.rc-filter-row:last-child { margin-bottom: 0; }

.rc-filter-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}
.rc-filter-head label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin: 0;
}

.rc-filter-grid {
  display: grid;
  grid-template-columns: 1fr 140px;
  gap: 10px;
}
.rc-filter-item label,
.rc-filter-item-sm label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
  font-weight: 500;
}

.rc-filter input[type="text"],
.rc-filter select {
  font-size: 0.9rem;
  padding: 8px 12px;
}

/* ===== Chip Group ===== */
.rc-chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.rc-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  background: #fff;
  font-size: 0.85rem;
  font-family: inherit;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  user-select: none;
}
.rc-chip:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.rc-chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.rc-chip.active:hover {
  background: var(--primary-dark);
}

/* ===== Mode Toggle (AND/OR) ===== */
.rc-mode-toggle {
  display: inline-flex;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  padding: 2px;
  background: #f9fafb;
}
.rc-mode-btn {
  padding: 4px 10px;
  border: none;
  background: transparent;
  border-radius: 999px;
  font-size: 0.78rem;
  font-family: inherit;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.rc-mode-btn.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 1px 2px rgba(26, 86, 219, 0.25);
}

/* ===== Tag Groups ===== */
.rc-tag-groups {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 280px;
  overflow-y: auto;
  padding: 2px;
}

.rc-tag-category-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.rc-tag-category-items {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.rc-tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  font-size: 0.78rem;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}
.rc-tag-chip input { display: none; }
.rc-tag-chip:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}
.rc-tag-chip:has(input:checked) {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ===== Filter Actions ===== */
.rc-filter-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}
.rc-result-count {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.rc-result-count strong {
  color: var(--primary);
  font-weight: 700;
}

#btn-clear-filters {
  padding: 6px 14px;
  font-size: 0.85rem;
  width: auto;
}

/* ===== Resource List ===== */
.rc-resource-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rc-resource-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 12px;
  transition: box-shadow 0.2s, transform 0.2s;
  border-left: 3px solid transparent;
}
.rc-resource-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}
.rc-resource-card.type-article { border-left-color: #8b5cf6; }
.rc-resource-card.type-slide   { border-left-color: #f59e0b; }
.rc-resource-card.type-video   { border-left-color: #ef4444; }
.rc-resource-card.type-other   { border-left-color: #6b7280; }

.rc-card-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: var(--primary-light);
}
.rc-card-icon.type-article { background: #f3e8ff; }
.rc-card-icon.type-slide   { background: #fef3c7; }
.rc-card-icon.type-video   { background: #fee2e2; }
.rc-card-icon.type-other   { background: #f3f4f6; }

.rc-card-body {
  flex: 1;
  min-width: 0;
}

.rc-card-title {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.4;
  word-break: break-word;
}

.rc-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.rc-card-meta .meta-dot::before {
  content: '·';
  margin-right: 4px;
}
.rc-card-meta .meta-event {
  color: var(--primary);
  font-weight: 500;
}

.rc-card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.rc-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 10px;
}
.rc-card-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  background: #f3f4f6;
  color: var(--text-secondary);
  border-radius: 999px;
}

.rc-card-actions {
  display: flex;
  gap: 8px;
}
.rc-card-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  border: 1.5px solid var(--primary);
  border-radius: 8px;
  background: #fff;
  color: var(--primary);
  font-size: 0.82rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}
.rc-card-btn:hover {
  background: var(--primary);
  color: #fff;
}
.rc-card-btn.primary {
  background: var(--primary);
  color: #fff;
}
.rc-card-btn.primary:hover {
  background: var(--primary-dark);
}
.rc-card-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== Empty / Loading States ===== */
.loading-placeholder {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.rc-empty {
  text-align: center;
  padding: 60px 20px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--text-secondary);
}
.rc-empty-icon {
  font-size: 2.6rem;
  margin-bottom: 10px;
  opacity: 0.5;
}
.rc-empty-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.rc-empty-hint {
  font-size: 0.85rem;
}

/* ===== Skeleton ===== */
.rc-skeleton {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 12px;
}
.rc-skeleton-icon,
.rc-skeleton-line {
  background: linear-gradient(90deg, #f3f4f6 0%, #e5e7eb 50%, #f3f4f6 100%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s infinite;
  border-radius: 6px;
}
.rc-skeleton-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 10px;
}
.rc-skeleton-body { flex: 1; }
.rc-skeleton-line {
  height: 12px;
  margin-bottom: 8px;
}
.rc-skeleton-line.w60 { width: 60%; }
.rc-skeleton-line.w80 { width: 80%; }
.rc-skeleton-line.w40 { width: 40%; }

@keyframes skeleton-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== Toast override (resources) ===== */
.toast { display: none; }
.toast.active { display: block; }

/* ===== Responsive tweaks ===== */
@media (max-width: 480px) {
  .rc-filter-grid {
    grid-template-columns: 1fr;
  }
  .rc-filter-item-sm { width: 100%; }
  .rc-title { font-size: 0.95rem; }
  .rc-back span { display: none; }
  .rc-card-icon {
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
  }
}

@media (min-width: 900px) {
  .rc-resource-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }
  .rc-filter {
    position: sticky;
    top: 72px;
    z-index: 50;
  }
}