/* ==========================================================================
   CASLAB Research Knowledge Graph & Nexus Styles
   ========================================================================== */

.research-page-container {
  width: 100%;
  margin: 0 auto;
  padding-bottom: 40px;
}

/* Header & Mission Banner */
.research-hero {
  margin-bottom: 25px;
}

.research-hero-title {
  font-size: 2.2em;
  font-weight: 700;
  color: #003876; /* Yonsei Navy */
  margin-bottom: 6px;
  letter-spacing: -0.4px;
}

.research-hero-description {
  font-size: 1.02em;
  line-height: 1.7;
  color: #334155;
  margin-bottom: 20px;
  max-width: 820px;
}

.research-hero-description strong {
  color: #0f172a;
  font-weight: 600;
}

/* Controls & View Switcher */
.research-control-bar {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 20px;
}

.research-search-row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.research-search-box {
  flex: 1;
  min-width: 260px;
  position: relative;
}

.research-search-box input {
  width: 100%;
  padding: 9px 14px 9px 38px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  font-size: 0.95em;
  outline: none;
  transition: all 0.2s;
}

.research-search-box input:focus {
  border-color: #003876;
  box-shadow: 0 0 0 3px rgba(0, 56, 118, 0.12);
}

.research-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
  font-size: 0.95em;
}

.research-search-clear {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
  cursor: pointer;
  display: none;
  font-size: 1.1em;
}

.research-view-toggle {
  display: flex;
  background: #f1f5f9;
  padding: 3px;
  border-radius: 8px;
  gap: 4px;
}

.research-view-btn {
  border: none;
  background: transparent;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.88em;
  font-weight: 600;
  color: #64748b;
  cursor: pointer;
  transition: all 0.15s ease;
}

.research-view-btn.active {
  background: #ffffff;
  color: #003876;
  border: 1px solid #e2e8f0;
}

/* Category Filter Chips */
.research-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.research-filter-label {
  font-size: 0.85em;
  font-weight: 600;
  color: #64748b;
  margin-right: 4px;
}

.research-filter-chip {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  color: #475569;
  padding: 5px 12px;
  border-radius: 16px;
  font-size: 0.85em;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.research-filter-chip:hover {
  background: #e2e8f0;
  color: #1e293b;
}

.research-filter-chip.active {
  background: #003876;
  border-color: #003876;
  color: #ffffff;
}

/* Main Workspace Layout */
.research-workspace {
  display: flex;
  gap: 20px;
  min-height: 720px;
  position: relative;
}

@media (max-width: 991px) {
  .research-workspace {
    flex-direction: column;
  }
}

/* Graph Canvas Container */
.research-graph-card {
  flex: 7;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  height: 720px;
  display: flex;
  flex-direction: column;
}

#research-graph-svg {
  width: 100%;
  height: 100%;
  cursor: grab;
  background: #ffffff;
}

#research-graph-svg:active {
  cursor: grabbing;
}

/* Fullscreen mode: workspace holds both the graph and the publication inspector */
#research-graph-workspace:fullscreen,
#research-graph-workspace:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  padding: 16px;
  gap: 16px;
  background: #f8fafc;
  box-sizing: border-box;
}

#research-graph-workspace:fullscreen .research-graph-card,
#research-graph-workspace:-webkit-full-screen .research-graph-card,
#research-graph-workspace:fullscreen .research-inspector-card,
#research-graph-workspace:-webkit-full-screen .research-inspector-card {
  height: 100%;
}

#research-graph-workspace:fullscreen .research-graph-card {
  border-radius: 8px;
}

/* Graph Canvas Overlays */
.graph-controls-overlay {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 10;
}

.graph-tool-btn {
  width: 32px;
  height: 32px;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1em;
  font-weight: bold;
  color: #334155;
  cursor: pointer;
  transition: all 0.15s;
}

.graph-tool-btn:hover {
  background: #f1f5f9;
  color: #003876;
}

.graph-legend-overlay {
  position: absolute;
  bottom: 14px;
  left: 14px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 0.78em;
  z-index: 10;
}

.graph-legend-title {
  font-weight: 700;
  color: #475569;
  margin-bottom: 4px;
}

.graph-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 3px;
  color: #334155;
}

.graph-legend-color {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.graph-hint-overlay {
  position: absolute;
  bottom: 14px;
  right: 14px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.78em;
  color: #64748b;
  z-index: 10;
  pointer-events: none;
}

/* SVG Node & Link Styles */
.graph-link {
  stroke: #cbd5e1;
  stroke-opacity: 0.45;
  transition: stroke 0.2s, stroke-opacity 0.2s;
}

.graph-link.highlighted {
  stroke: #003876;
  stroke-opacity: 0.85;
  stroke-width: 2.2px !important;
}

.graph-node {
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
}

.graph-node circle {
  stroke-width: 2px;
  transition: all 0.2s ease;
}

.graph-node.active circle {
  stroke: #003876 !important;
  stroke-width: 4px !important;
}

.graph-node text {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 11px;
  font-weight: 600;
  fill: #1e293b;
  pointer-events: none;
  paint-order: stroke;
  stroke: #ffffff;
  stroke-width: 3px;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.graph-node.dimmed {
  opacity: 0.15;
}

.graph-link.dimmed {
  opacity: 0.06;
}

.graph-node.hidden,
.graph-link.hidden {
  display: none;
}

/* Floating Tooltip */
.graph-tooltip {
  position: absolute;
  display: none;
  background: rgba(15, 23, 42, 0.92);
  color: #ffffff;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.82em;
  pointer-events: none;
  z-index: 100;
  max-width: 240px;
  line-height: 1.4;
}

.graph-tooltip-title {
  font-weight: bold;
  font-size: 1.05em;
  margin-bottom: 3px;
}

.graph-tooltip-domain {
  font-size: 0.9em;
  color: #93c5fd;
  margin-bottom: 2px;
}

.graph-tooltip-count {
  font-size: 0.85em;
  color: #cbd5e1;
}

/* Inspector Panel (Right Column) */
.research-inspector-card {
  flex: 5;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  height: 720px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.inspector-header {
  padding: 16px 20px;
  border-bottom: 1px solid #e2e8f0;
  background: #f8fafc;
}

.inspector-header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.inspector-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.inspector-domain-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.76em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.inspector-title {
  font-size: 1.45em;
  font-weight: 800;
  color: #0f172a;
  margin: 4px 0 6px;
  line-height: 1.25;
}

.inspector-meta {
  font-size: 0.88em;
  color: #64748b;
}

/* Connected Keywords Chips */
.inspector-connected-section {
  margin-top: 10px;
}

.inspector-connected-label {
  font-size: 0.78em;
  font-weight: 700;
  text-transform: uppercase;
  color: #94a3b8;
  margin-bottom: 5px;
}

.inspector-connected-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.inspector-chip {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  padding: 3px 8px;
  border-radius: 12px;
  font-size: 0.78em;
  color: #334155;
  cursor: pointer;
  transition: all 0.15s;
}

.inspector-chip:hover {
  background: #003876;
  border-color: #003876;
  color: #ffffff;
}

/* Publications List inside Inspector */
.inspector-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
}

.inspector-body::-webkit-scrollbar {
  width: 6px;
}

.inspector-body::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

.inspector-section-heading {
  font-size: 0.9em;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #64748b;
  margin-bottom: 12px;
}

.pub-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 14px;
  margin-bottom: 12px;
  transition: border-color 0.15s;
}

.pub-card:hover {
  border-color: #003876;
}

.pub-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.pub-card-venue {
  font-size: 0.8em;
  font-weight: 700;
  color: #003876;
  background: #f1f5f9;
  padding: 2px 7px;
  border-radius: 4px;
}

.pub-card-venue.top-tier {
  background: #003876;
  color: #ffffff;
}

.pub-card-year {
  font-size: 0.8em;
  font-weight: 600;
  color: #64748b;
}

.pub-card-title {
  font-size: 0.98em;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 6px;
}

.pub-card-title a {
  color: #0f172a;
  text-decoration: none;
}

.pub-card-title a:hover {
  color: #003876;
  text-decoration: underline;
}

.pub-card-authors {
  font-size: 0.82em;
  color: #475569;
  margin-bottom: 8px;
  line-height: 1.35;
}

.pub-card-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 10px;
}

.pub-card-action {
  text-align: right;
}

.pub-card-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82em;
  font-weight: 600;
  color: #003876;
  text-decoration: none;
  background: #f1f5f9;
  padding: 4px 10px;
  border-radius: 4px;
  transition: all 0.15s;
}

.pub-card-link-btn:hover {
  background: #003876;
  color: #ffffff;
  text-decoration: none;
}

/* Empty / Welcome State in Inspector */
.inspector-welcome {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  height: 100%;
  padding: 24px;
  color: #64748b;
}

.inspector-welcome-icon {
  font-size: 3em;
  margin-bottom: 12px;
  color: #94a3b8;
}

.inspector-welcome-title {
  font-size: 1.25em;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 8px;
}

.inspector-welcome-text {
  font-size: 0.92em;
  line-height: 1.5;
  margin-bottom: 20px;
  max-width: 340px;
}

.inspector-featured-box {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 14px;
  width: 100%;
  text-align: left;
}

.inspector-featured-title {
  font-size: 0.82em;
  font-weight: 700;
  text-transform: uppercase;
  color: #475569;
  margin-bottom: 8px;
}

.inspector-featured-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* Structured Matrix / Pillar View (Alternative View) */
.research-matrix-view {
  display: none;
}

.research-matrix-view.active {
  display: block;
}

.pillar-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 24px;
}

.pillar-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid #f1f5f9;
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.pillar-card-title {
  font-size: 1.5em;
  font-weight: 800;
  color: #0f172a;
  margin: 0;
}

.pillar-card-desc {
  font-size: 1.05em;
  line-height: 1.6;
  color: #334155;
  margin-bottom: 18px;
}

.pillar-keywords-box {
  margin-bottom: 18px;
}

.pillar-keywords-title {
  font-size: 0.82em;
  font-weight: 700;
  text-transform: uppercase;
  color: #64748b;
  margin-bottom: 6px;
}

.pillar-pubs-title {
  font-size: 1.05em;
  font-weight: 700;
  color: #003876;
  margin-bottom: 10px;
}

.pillar-pubs-list {
  padding-left: 20px;
  line-height: 1.7;
}

.pillar-pubs-list li {
  margin-bottom: 6px;
}

.pillar-pubs-list a {
  font-weight: 600;
  color: #0f172a;
}

.pillar-pubs-list a:hover {
  color: #003876;
}