/* ==========================================================================
   BarrioRadar Research Page Styling - Editorial Data Journalism
   Theme: Clean White, Editorial Precision, Flat Solid Palette (No Gradients)
   ========================================================================== */

.research-article {
  background: var(--br-color-bg-pure);
  color: var(--br-color-text-main);
  font-family: var(--br-font-sans);
  line-height: 1.6;
  padding-bottom: 64px;
}

/* Article Hero */
.research-hero {
  background: var(--br-color-bg-subtle);
  border-bottom: 1px solid var(--br-color-border-light);
  padding: 48px 0 40px;
}

.research-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

.research-prose-container {
  max-width: 760px;
  margin: 0 auto;
}

.research-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--br-color-brand-accent-subtle);
  color: var(--br-color-brand-accent);
  padding: 4px 12px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.research-hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--br-color-text-main);
  margin: 0 0 16px 0;
  letter-spacing: -0.02em;
}

@media (max-width: 640px) {
  .research-hero-title {
    font-size: 1.875rem;
  }
}

.research-hero-lead {
  font-size: 1.125rem;
  color: var(--br-color-text-secondary);
  line-height: 1.6;
  margin: 0 0 24px 0;
}

.research-byline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--br-color-border-light);
  font-size: 0.8125rem;
  color: var(--br-color-text-muted);
}

.research-share-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.research-share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: #ffffff;
  border: 1px solid var(--br-color-border-medium);
  border-radius: 6px;
  color: var(--br-color-text-main);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.research-share-btn:hover {
  border-color: var(--br-color-brand-accent);
  color: var(--br-color-brand-accent);
}

/* Hero Featured Media Figure */
.research-hero-media {
  max-width: 860px;
  margin: 32px auto 0;
  border-radius: var(--br-radius-lg, 12px);
  overflow: hidden;
  border: 1px solid var(--br-color-border-light);
  background: #0b111e;
  box-shadow: 0 4px 20px -2px rgba(11, 17, 30, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
}

.research-hero-img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 1376 / 768;
  object-fit: cover;
}

.research-hero-caption {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: #ffffff;
  border-top: 1px solid var(--br-color-border-light);
  font-size: 0.8125rem;
  color: var(--br-color-text-secondary);
  line-height: 1.4;
}

.research-hero-caption i,
.research-hero-caption svg {
  flex-shrink: 0;
  color: var(--br-color-brand-accent);
}

/* Key Facts Strip */
.research-kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin: 32px 0 48px;
}

@media (max-width: 900px) {
  .research-kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .research-kpi-grid {
    grid-template-columns: 1fr;
  }
}

.research-kpi-card {
  background: #ffffff;
  border: 1px solid var(--br-color-border-light);
  border-radius: var(--br-radius-lg, 12px);
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.research-kpi-val {
  font-family: var(--br-font-mono);
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--br-color-brand-primary);
  line-height: 1.2;
  margin-bottom: 4px;
}

.research-kpi-label {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--br-color-text-main);
  margin-bottom: 4px;
}

.research-kpi-sub {
  font-size: 0.75rem;
  color: var(--br-color-text-muted);
  line-height: 1.4;
}

/* Sections */
.research-section {
  padding: 48px 0;
  border-top: 1px solid var(--br-color-border-light);
  scroll-margin-top: 80px;
}

.research-section-header {
  margin-bottom: 24px;
}

.research-section-tag {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--br-color-brand-accent);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.research-anchor-link {
  color: var(--br-color-text-secondary);
  background: #ffffff;
  border: 1px solid var(--br-color-border-medium);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s ease;
  cursor: pointer;
  text-transform: none;
  letter-spacing: normal;
}

.research-anchor-link:hover {
  border-color: var(--br-color-brand-accent);
  color: var(--br-color-brand-accent);
  background: var(--br-color-brand-accent-subtle);
}

.research-section-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--br-color-text-main);
  margin: 0 0 12px 0;
  letter-spacing: -0.01em;
}

.research-section-intro {
  font-size: 1rem;
  color: var(--br-color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Chart Cards */
.research-chart-card {
  background: #ffffff;
  border: 1px solid var(--br-color-border-medium);
  border-radius: var(--br-radius-xl, 16px);
  padding: 24px;
  margin: 24px 0;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

@media (max-width: 640px) {
  .research-chart-card {
    padding: 16px 12px;
  }
}

.research-chart-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--br-color-border-light);
}

.research-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.research-filter-btn {
  padding: 6px 12px;
  background: var(--br-color-bg-subtle);
  border: 1px solid var(--br-color-border-light);
  border-radius: 6px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--br-color-text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.research-filter-btn:hover {
  border-color: var(--br-color-brand-accent);
  color: var(--br-color-brand-accent);
}

.research-filter-btn.active {
  background: var(--br-color-brand-accent);
  border-color: var(--br-color-brand-accent);
  color: #ffffff;
}

/* Map specific */
.research-map-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 20px;
}

@media (max-width: 900px) {
  .research-map-layout {
    grid-template-columns: 1fr;
  }
}

.research-map-canvas-wrap {
  position: relative;
  background: #f8fafc;
  border: 1px solid var(--br-color-border-light);
  border-radius: 10px;
  overflow: hidden;
  min-height: 540px;
  height: 560px;
}

#leaflet-map-container {
  width: 100%;
  height: 100%;
  z-index: 1;
}

.research-map-legend {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(4px);
  border: 1px solid var(--br-color-border-light);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.75rem;
  z-index: 500;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.research-legend-scale {
  display: flex;
  height: 10px;
  width: 140px;
  border-radius: 2px;
  margin: 4px 0;
}

.research-map-details-card {
  background: var(--br-color-bg-subtle);
  border: 1px solid var(--br-color-border-light);
  border-radius: 10px;
  padding: 16px;
}

/* D3 Tooltip */
.research-tooltip {
  position: absolute;
  pointer-events: none;
  background: #0f172a;
  color: #ffffff;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-family: var(--br-font-sans);
  line-height: 1.4;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  display: none;
}

/* Extremes Grid */
.research-extremes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

@media (max-width: 900px) {
  .research-extremes-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .research-extremes-grid {
    grid-template-columns: 1fr;
  }
}

.research-extreme-card {
  background: #ffffff;
  border: 1px solid var(--br-color-border-light);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.research-extreme-rep-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #64748b;
  letter-spacing: 0.05em;
  margin-top: 10px;
  margin-bottom: 2px;
}

.research-extreme-eyebrow {
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--br-color-brand-accent);
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.research-extreme-addr {
  font-size: 0.9375rem;
  font-weight: 800;
  color: var(--br-color-text-main);
  margin-bottom: 4px;
  line-height: 1.3;
}

.research-extreme-pc {
  font-family: var(--br-font-mono);
  font-size: 0.75rem;
  color: var(--br-color-text-muted);
  margin-bottom: 12px;
}

.research-extreme-score {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
}

.research-extreme-num {
  font-family: var(--br-font-mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--br-color-text-main);
  line-height: 1;
}

/* Editorial Callout */
.research-callout {
  background: #f8fafc;
  border-left: 4px solid var(--br-color-brand-accent);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 24px 0;
  font-size: 0.9375rem;
  color: var(--br-color-text-secondary);
}

.research-callout strong {
  color: var(--br-color-text-main);
}

/* Methodology Accordion */
.research-methodology-card {
  background: var(--br-color-bg-subtle);
  border: 1px solid var(--br-color-border-light);
  border-radius: 12px;
  padding: 24px;
  margin-top: 24px;
}

.research-source-item {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--br-color-border-light);
}

.research-source-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

/* Empirical Data Table */
.research-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin-top: 16px;
  -webkit-overflow-scrolling: touch;
}

.research-data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  text-align: left;
}

.research-data-table th {
  background: #f8fafc;
  color: var(--br-color-text-main);
  font-weight: 700;
  padding: 10px 14px;
  border-bottom: 2px solid var(--br-color-border-light);
  white-space: nowrap;
}

.research-data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--br-color-border-light);
  color: var(--br-color-text-secondary);
}

.research-data-table tr:hover td {
  background: #f8fafc;
}

.research-data-table td.val-col {
  font-family: var(--br-font-mono);
  font-weight: 700;
  color: var(--br-color-text-main);
  white-space: nowrap;
}

/* FAQ Grid */
.research-faq-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
}

.research-faq-item {
  background: var(--br-color-bg-subtle);
  border: 1px solid var(--br-color-border-light);
  border-radius: 12px;
  padding: 20px 24px;
}

.research-faq-q {
  font-size: 1rem;
  font-weight: 800;
  color: var(--br-color-text-main);
  margin: 0 0 10px 0;
  line-height: 1.4;
}

.research-faq-a {
  font-size: 0.875rem;
  color: var(--br-color-text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* Academic Citation Card */
.research-citation-card {
  margin-top: 24px;
  background: #f8fafc;
  border: 1px solid var(--br-color-border-light);
  border-radius: 10px;
  padding: 20px;
}