/* =============================================
   MCN CONNECTIVITY — DARK THEME STYLES
   ============================================= */

:root {
  --bg-deep:    #080c14;
  --bg-card:    #0e1420;
  --bg-panel:   #121929;
  --bg-control: #161e2e;
  --border:     rgba(255,255,255,0.07);
  --border-hi:  rgba(255,255,255,0.15);

  --text-primary:   #eef2ff;
  --text-secondary: #8892a4;
  --text-accent:    #FFC629;

  /* Alexandria brand gold */
  --gold: #FFC629;
  --gold-soft: rgba(255,198,41,0.35);

  /* Year palette — visually distinct, harmonious */
  --c-2001: #38bdf8;   /* sky blue */
  --c-2008: #a78bfa;   /* violet */
  --c-2013: #34d399;   /* emerald */
  --c-2016: #f472b6;   /* pink */
  --c-2019: #fb923c;   /* orange */
  --c-2022: #facc15;   /* gold */
  --c-multi:#e2e8f0;   /* white — appeared in multiple years */

  /* Role palette */
  --r-director: #f97316;
  --r-faculty:  #60a5fa;
  --r-lecturer: #a78bfa;
  --r-ta:       #34d399;
  --r-student:  #94a3b8;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow: 0 4px 24px rgba(0,0,0,0.6);
  --glow:   0 0 20px rgba(255,198,41,0.25);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%; height: 100%;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: 'Outfit', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
  overflow: hidden;
}

/* ── Header ─────────────────────────────────── */
#header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px;
  background: rgba(8,12,20,0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.header-left {
  display: flex; align-items: center; gap: 14px;
}

.logo-badge {
  width: 42px; height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #FFC629 0%, #ffe08a 100%);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; letter-spacing: 0.5px;
  color: #1a1400;
  box-shadow: 0 0 16px rgba(255,198,41,0.5);
  flex-shrink: 0;
}

#header h1 {
  font-size: 18px; font-weight: 700;
  background: linear-gradient(90deg, #eef2ff, #FFC629);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.3px;
}

.subtitle {
  font-size: 11px; color: var(--text-secondary);
  font-weight: 400; letter-spacing: 0.3px;
  display: block; margin-top: 1px;
}

.header-stats { display: flex; gap: 8px; }

.stat-pill {
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--bg-control);
  border: 1px solid var(--border);
  font-size: 12px; color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.stat-pill span {
  color: var(--text-accent);
  font-weight: 600;
}

/* ── Controls ────────────────────────────────── */
#controls {
  position: fixed; top: 67px; left: 0;
  z-index: 90;
  display: flex; flex-wrap: wrap; align-items: flex-start; gap: 12px;
  padding: 12px 20px;
  background: rgba(8,12,20,0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  width: 100%;
}

.control-group {
  display: flex; flex-direction: column; gap: 5px;
}

.control-label {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 1.2px;
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

.year-pills, .role-pills {
  display: flex; gap: 5px; flex-wrap: nowrap;
  overflow-x: auto; max-width: 480px;
  scrollbar-width: none;
}
.year-pills::-webkit-scrollbar { display: none; }

.role-pills { flex-wrap: wrap; max-width: none; }

.year-btn, .role-btn {
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-control);
  color: var(--text-secondary);
  font-size: 12px; font-weight: 500;
  cursor: pointer;
  transition: all 0.18s ease;
  font-family: 'Outfit', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

.year-btn:hover, .role-btn:hover {
  border-color: var(--border-hi);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.year-btn.active {
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 10px rgba(255,198,41,0.35);
  /* background-color is set dynamically by graph.js via yearColor() */
}

.role-btn.active {
  background: var(--gold);
  color: #1a1400;
  border-color: transparent;
  box-shadow: 0 0 10px rgba(255,198,41,0.35);
}

.role-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}
.role-btn:disabled:hover {
  border-color: var(--border);
  color: var(--text-secondary);
  transform: none;
}

/* Research-domain filter dropdown */
.domain-select {
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-control);
  color: var(--text-primary);
  font-size: 12px; font-weight: 500;
  font-family: 'Outfit', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  cursor: pointer;
  max-width: 200px;
}
.domain-select:hover:not(:disabled) { border-color: var(--border-hi); }
.domain-select:disabled { opacity: 0.4; cursor: not-allowed; }

.search-group { flex-grow: 1; min-width: 180px; }

.search-wrap {
  position: relative;
  display: flex; align-items: center;
}

.search-wrap input {
  width: 100%; padding: 6px 12px 6px 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-control);
  color: var(--text-primary);
  font-size: 13px;
  font-family: 'Outfit', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  outline: none;
  transition: border 0.2s;
}
.search-wrap input::placeholder { color: var(--text-secondary); }
.search-wrap input:focus { border-color: var(--gold); }

.search-icon {
  position: absolute; left: 10px;
  color: var(--text-secondary);
  font-size: 16px; pointer-events: none;
  line-height: 1;
}

/* ── Graph Area ──────────────────────────────── */
#graphContainer {
  position: fixed;
  top: 128px; bottom: 32px; left: 0; right: 0;
}

#graph {
  width: 100%; height: 100%;
  background: transparent;
}

/* ── Nodes & Links (SVG via D3) ──────────────── */
.node circle {
  cursor: pointer;
  transition: filter 0.2s;
}

.node circle:hover {
  filter: brightness(1.4) drop-shadow(0 0 8px currentColor);
}

.node.highlighted circle {
  filter: brightness(1.6) drop-shadow(0 0 12px currentColor);
}

.node.dimmed circle {
  opacity: 0.12;
}

.node.dimmed text {
  opacity: 0;
}

.node text {
  font-family: 'Outfit', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 11px;
  fill: var(--text-primary);
  pointer-events: none;
  text-shadow: 0 1px 4px rgba(0,0,0,0.9);
  transition: opacity 0.2s;
}

.link {
  stroke-opacity: 0.25;
  transition: stroke-opacity 0.2s;
}

.link.highlighted {
  stroke-opacity: 0.9;
}

.link.dimmed {
  stroke-opacity: 0.03;
}

/* ── Tooltip ─────────────────────────────────── */
.tooltip {
  position: fixed;
  z-index: 500;
  pointer-events: none;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: rgba(14,20,32,0.96);
  border: 1px solid var(--border-hi);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  max-width: 240px;
  transition: opacity 0.15s;
}

.tooltip.hidden { opacity: 0; }

.tooltip-name {
  font-size: 14px; font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.tooltip-meta {
  font-size: 11px; color: var(--text-secondary);
  line-height: 1.6;
}

.tooltip-years {
  margin-top: 6px;
  display: flex; gap: 4px; flex-wrap: wrap;
}

.tooltip-year-chip {
  padding: 2px 7px;
  border-radius: 999px;
  font-size: 10px; font-weight: 600;
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
}

/* ── Detail Panel ────────────────────────────── */
.detail-panel {
  position: fixed;
  top: 128px; right: 0; bottom: 32px;
  width: 280px;
  z-index: 200;
  padding: 20px;
  overflow-y: auto;
  background: rgba(12,18,30,0.95);
  backdrop-filter: blur(20px);
  border-left: 1px solid var(--border);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.detail-panel.visible {
  transform: translateX(0);
}

.detail-panel.hidden {
  display: block;
}

.close-btn {
  position: absolute; top: 14px; right: 14px;
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-control);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 12px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.close-btn:hover { border-color: var(--border-hi); color: var(--text-primary); }

.detail-avatar {
  width: 56px; height: 56px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -1px;
}

.detail-name {
  font-size: 17px; font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 2px;
}

.detail-role-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 10px; font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}

.detail-section {
  margin-top: 16px;
}

.detail-section-title {
  font-size: 9px; font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.detail-year-row {
  display: flex; align-items: center;
  gap: 8px; padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.detail-year-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.detail-year-label {
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 12px; color: var(--text-accent);
  font-weight: 500;
}

.detail-year-role {
  font-size: 11px; color: var(--text-secondary);
  margin-left: auto;
}

.detail-connections {
  font-size: 13px; color: var(--text-secondary);
  line-height: 1.7;
}

.detail-connections a {
  color: var(--text-accent);
  text-decoration: none;
  cursor: pointer;
}
.detail-connections a:hover { text-decoration: underline; }

/* Co-author list: name + shared-paper count chip, with an expandable list of
   papers for that pair and a "show all" toggle for the collaborator list. */
.detail-collabs {
  font-size: 13px; color: var(--text-secondary);
}
.detail-collabs-hidden { display: none; }
.detail-collab-row {
  padding: 3px 0;
}
.detail-collabs a {
  text-decoration: none;
  cursor: pointer;
}
.detail-collabs a:hover { text-decoration: underline; }
.detail-collab-count {
  display: inline-block;
  min-width: 16px;
  margin: 0 4px 0 3px;
  padding: 0 5px;
  border-radius: 999px;
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 10px;
  color: var(--text-accent);
  background: var(--bg-control);
  border: 1px solid var(--border);
  text-align: center;
  cursor: pointer;
}
.detail-collab-count:hover {
  border-color: var(--border-hi);
  color: var(--text-primary);
}
.detail-collab-papers {
  display: none;
  margin: 6px 0 4px 0;
  padding-left: 10px;
  border-left: 2px solid var(--border);
}
.detail-collab-papers.open { display: block; }
.detail-collab-paper {
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--text-secondary);
  padding: 2px 0;
}
.detail-collab-paper-year {
  color: var(--text-accent);
  font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 10px;
}
.detail-collab-paper-more {
  font-style: italic;
  opacity: 0.75;
}
.detail-collab-toggle {
  display: inline-block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-accent);
  text-decoration: none;
  cursor: pointer;
}
.detail-collab-toggle:hover { text-decoration: underline; }

.detail-ident-links {
  font-size: 12px;
}
.detail-ident-links a {
  color: var(--text-accent);
  text-decoration: none;
}
.detail-ident-links a:hover { text-decoration: underline; }

/* Research areas: primary domain + topic chips. */
.detail-domain {
  font-size: 13px; font-weight: 600;
  margin-bottom: 8px;
}
.detail-topics {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.detail-topic-chip {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-control);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.detail-career-box {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-control);
  border: 1px solid var(--border);
  margin-top: 8px;
}

.detail-career-institution {
  font-size: 13px; font-weight: 600; color: var(--text-primary);
}

.detail-career-role {
  font-size: 11px; color: var(--text-secondary); margin-top: 2px;
}

/* ── Legend ──────────────────────────────────── */
.legend {
  position: absolute;
  bottom: 16px; left: 16px;
  display: flex; gap: 14px; flex-wrap: wrap;
  pointer-events: none;
}

.legend-item {
  display: flex; align-items: center; gap: 5px;
  font-size: 11px; color: var(--text-secondary);
}

.legend-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* Edge-type swatch — a short line rather than a dot. */
.legend-line {
  width: 16px; height: 3px;
  border-radius: 2px;
  flex-shrink: 0;
}

/* ── Footer ──────────────────────────────────── */
#footer {
  position: fixed; bottom: 0; left: 0; right: 0;
  z-index: 80;
  display: flex; align-items: center; gap: 10px;
  padding: 6px 20px;
  font-size: 11px; color: var(--text-secondary);
  background: rgba(8,12,20,0.85);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
}

#footer a { color: var(--text-accent); text-decoration: none; }
#footer a:hover { text-decoration: underline; }

/* ── Responsive tweak ────────────────────────── */
@media (max-width: 768px) {
  #controls { gap: 8px; padding: 8px 14px; }
  .detail-panel { width: 100%; }
  #graphContainer { top: 160px; }
}

/* ── Pulse animation for newly highlighted nodes ─ */
@keyframes pulse-glow {
  0%   { filter: brightness(1.4) drop-shadow(0 0 6px currentColor); }
  50%  { filter: brightness(1.8) drop-shadow(0 0 16px currentColor); }
  100% { filter: brightness(1.4) drop-shadow(0 0 6px currentColor); }
}

.node.search-hit circle {
  animation: pulse-glow 1.5s ease-in-out infinite;
}

/* scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-hi); border-radius: 2px; }