/**
 * Cascade Nexus — Article Page & Flagged Page
 * Article reader, flagged reading list styles.
 */

/* ─── Article Hero Image ─────────────────────────────────────────────── */
.article-header-image {
  width: 100%;
  height: 360px;
  border-radius: var(--card-radius);
  background: linear-gradient(135deg, var(--forest-dark), var(--slate-bg));
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
}

.article-header-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 40% at 50% 60%, var(--glow-cyan-subtle) 0%, transparent 60%);
  pointer-events: none;
}

.article-header-image .placeholder-icon {
  font-size: 64px;
  opacity: 0.25;
  z-index: 1;
}

/* ─── Article Title ──────────────────────────────────────────────────── */
.article-title {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text-primary);
}

/* ─── Article Meta Bar ───────────────────────────────────────────────── */
.article-meta-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 28px;
  align-items: center;
}

.meta-tag {
  background: var(--badge-green-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 500;
}

.confidence-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-tertiary);
}

.confidence-fill {
  height: 4px;
  width: 100px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.confidence-fill div {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--emerald), var(--aurora-cyan));
}

/* ─── Article Summary ────────────────────────────────────────────────── */
.article-summary {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 32px;
  padding: 20px 24px;
  background: var(--badge-green-bg);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
}

/* ─── Article Sections ───────────────────────────────────────────────── */
.article-section {
  margin-bottom: 32px;
}

.article-section h3 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  color: var(--text-tertiary);
  margin-bottom: 14px;
}

/* ─── Key Takeaways ──────────────────────────────────────────────────── */
.key-takeaways {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  padding: 20px 24px;
}

.key-takeaways li {
  list-style: none;
  padding: 9px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  gap: 10px;
  line-height: 1.5;
}

.key-takeaways li::before {
  content: '→';
  color: var(--aurora-cyan);
  font-weight: 600;
  flex-shrink: 0;
}

.key-takeaways li:last-child { border-bottom: none; }

/* ─── Timeline ───────────────────────────────────────────────────────── */
.article-timeline {
  margin-top: 0;
}

.timeline-item {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
}

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

.timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--aurora-cyan);
  flex-shrink: 0;
  margin-top: 4px;
  box-shadow: 0 0 8px var(--glow-cyan);
}

.timeline-content .date {
  font-size: 12px;
  color: var(--text-tertiary);
  font-weight: 500;
  margin-bottom: 2px;
}

.timeline-content .text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ─── Related Topics ─────────────────────────────────────────────────── */
.related-topics {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.topic-tag {
  padding: 5px 14px;
  border-radius: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.25s ease;
}

.topic-tag:hover {
  border-color: var(--aurora-cyan);
  color: var(--aurora-cyan);
  background: var(--active-bg);
}

/* ─── Article Sources ────────────────────────────────────────────────── */
.article-sources {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ─── Flagged Articles Page ──────────────────────────────────────────── */
.flagged-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  align-items: center;
}

.flagged-controls .search-input {
  padding: 9px 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 13px;
  outline: none;
  flex: 1;
  max-width: 300px;
  box-shadow: var(--shadow-sm);
}

.flagged-controls .search-input:focus {
  border-color: var(--aurora-cyan);
}

.filter-chip {
  padding: 6px 16px;
  border-radius: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.filter-chip:hover,
.filter-chip.active {
  border-color: var(--aurora-cyan);
  background: var(--active-bg);
  color: var(--aurora-cyan);
}

/* ─── Flagged Card ───────────────────────────────────────────────────── */
.flagged-card {
  display: flex;
  gap: 16px;
  padding: 20px 24px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  margin-bottom: 10px;
  transition:
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.3s ease,
    border-color 0.3s ease;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.flagged-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
  transform: translateX(4px);
}

.flagged-card.unread {
  border-left: 3px solid var(--aurora-cyan);
}

.flagged-card.pinned {
  background: var(--badge-gold-bg);
  border-color: var(--badge-gold-border);
}

.flagged-card .flag-icon {
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.flagged-card .flag-content {
  flex: 1;
  min-width: 0;
}

.flagged-card .flag-content h4 {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.flagged-card .flag-content p {
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.5;
}

.flagged-card .flag-meta {
  display: flex;
  gap: 14px;
  margin-top: 8px;
  font-size: 11px;
  color: var(--text-tertiary);
  flex-wrap: wrap;
}

.flag-status {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
}

.flag-status.reading {
  background: var(--badge-gold-bg);
  color: var(--gold);
}

.flag-status.follow-up {
  background: var(--badge-blue-bg);
  color: var(--pacific-blue);
}

.flag-status.archived {
  background: var(--badge-gray-bg);
  color: var(--text-tertiary);
}

/* ─── Flagged Actions ────────────────────────────────────────────────── */
.flagged-actions {
  display: flex;
  flex-direction: column;
  gap: 6px;
  justify-content: center;
}

.flag-action-btn {
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  color: var(--text-tertiary);
}

.flag-action-btn:hover {
  border-color: var(--aurora-cyan);
  background: var(--active-bg);
  color: var(--aurora-cyan);
}

/* ─── Flag Button ────────────────────────────────────────────────────── */
.btn-flag {
  background: var(--badge-gold-bg);
  border-color: var(--badge-gold-border);
  color: var(--gold);
}

.btn-flag:hover {
  background: var(--badge-gold-border);
  border-color: var(--gold);
}

.btn-flag.flagged {
  background: rgba(251, 191, 36, 0.2);
  border-color: var(--gold);
}

/* ─── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .article-title { font-size: 1.8rem; }
  .article-header-image { height: 220px; }
  .flagged-card { flex-direction: column; }
  .flagged-actions { flex-direction: row; justify-content: flex-end; }
  .flagged-controls .search-input { max-width: 100%; }
}