/* ─── Custom Properties ───────────────────────────────────────────────────── */
:root {
  /* Quadrant palette — professional categorical */
  --q-techniques:       #1a7a8a;
  --q-tools:            #2e7d52;
  --q-platforms:        #b45309;
  --q-frameworks:       #8b2252;

  /* Quadrant palettes – subtle tint for ring arc fills */
  --q-techniques-tint:  #e8f5f7;
  --q-tools-tint:       #e8f4ee;
  --q-platforms-tint:   #fdf3e3;
  --q-frameworks-tint:  #f9edf3;

  /* Ring arc backgrounds (used for each concentric band) */
  --ring-bg-1: #f5f6f8;   /* adopt  – innermost, lightest */
  --ring-bg-2: #eef0f3;   /* trial */
  --ring-bg-3: #e6e9ed;   /* assess */
  --ring-bg-4: #dde1e7;   /* hold   – outermost, darkest */

  /* Node */
  --node-r:              12px;
  --node-font-size:      9px;
  --node-fade-opacity:   0.3;
  --node-stroke-width:   1.5px;

  /* Ring/quadrant labels */
  --ring-label-size:     10px;
  --ring-label-color:    #9ca3af;
  --quadrant-label-size: 13px;
  --quadrant-label-font: 500 13px/1 system-ui, sans-serif;

  /* Node label fill (white in light, dark in dark mode for better contrast on bright colors) */
  --node-label-fill:  #ffffff;

  /* Gap between quadrants in degrees (approx) */
  --gap-deg: 1.8;

  /* General surfaces */
  --bg:           #f4f5f7;
  --surface:      #ffffff;
  --text:         #111827;
  --text-muted:   #6b7280;
  --border:       #e5e7eb;

  /* Header */
  --header-bg:    #ffffff;
  --header-border:#e5e7eb;

  /* Filter bar */
  --filter-bg:    #f9fafb;
  --chip-bg:      #e5e7eb;
  --chip-active-bg: var(--q-techniques);
  --chip-active-text: #ffffff;

  /* Panel */
  --panel-bg:     #ffffff;
  --panel-width:  min(38vw, 520px);
  --panel-shadow: 4px 0 32px rgba(0,0,0,0.12);
  --scrim-bg:     rgba(0, 0, 0, 0.25);

  /* Legend */
  --legend-bg: #f9fafb;

  /* Font stacks */
  --font-body: system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Cascadia Code", Consolas, "Courier New", monospace;
}

/* ─── Dark Mode ───────────────────────────────────────────────────────────── */
[data-bs-theme="dark"] {
  --q-techniques:       #4dd0e1;
  --q-tools:            #66bb8a;
  --q-platforms:        #ffa726;
  --q-frameworks:       #f06292;

  --q-techniques-tint:  #0f2a2e;
  --q-tools-tint:       #0f2519;
  --q-platforms-tint:   #2a1e0a;
  --q-frameworks-tint:  #271020;

  --ring-bg-1: #1e2332;
  --ring-bg-2: #191e2c;
  --ring-bg-3: #141826;
  --ring-bg-4: #0f1220;

  --bg:           #0f1220;
  --surface:      #1a1f2e;
  --text:         #f1f5f9;
  --text-muted:   #94a3b8;
  --border:       #2d3748;

  --header-bg:    #1a1f2e;
  --header-border:#2d3748;

  --filter-bg:    #131825;
  --chip-bg:      #2d3748;

  --panel-bg:     #1a1f2e;
  --panel-shadow: 4px 0 32px rgba(0,0,0,0.5);
  --scrim-bg:     rgba(0, 0, 0, 0.45);

  --legend-bg:    #131825;

  --ring-label-color: #94a3b8;  /* improved contrast in dark mode */

  --node-label-fill:  #0d1117;  /* dark text on bright quadrant colors in dark mode */
}

/* ─── Reset / Base ────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  margin: 0;
  overflow-x: hidden;
}

/* ─── Loading Screen ──────────────────────────────────────────────────────── */
.loading-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100dvh;
  background: var(--bg);
}

.loading-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: var(--text-muted);
}

.loading-radar {
  color: var(--q-techniques);
  animation: spin 3s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-label {
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0;
}

/* ─── App Layout: filter bar full-width, then radar + sidebar side-by-side ── */
.app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  overflow: hidden;
}

/* Full-width filter row at top */
.filter-row {
  display: flex;
  align-items: stretch;
  flex-shrink: 0;
  background: var(--filter-bg);
  border-bottom: 1px solid var(--border);
}

/* Main content area below filter row */
.main-row {
  flex: 1;
  display: flex;
  min-height: 0;
  overflow: hidden;
}

/* ─── Sidebar ──────────────────────────────────────────────────────────────── */
.sidebar {
  width: min(38vw, 520px);
  flex-shrink: 0;
  border-left: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.sidebar-header {
  padding: 14px 18px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-logo-wrap img {
  height: 28px;
  width: auto;
  margin-bottom: 6px;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0 0 3px;
  line-height: 1.25;
}

.sidebar-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.4;
}

.sidebar-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 0 18px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-section { }

.sidebar-section-title {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 12px 0 8px;
}

.sidebar-how-to {
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-muted);
}

.sidebar-how-to p { margin: 0 0 6px; }
.sidebar-how-to p:last-child { margin-bottom: 0; }
.sidebar-how-to strong { color: var(--text); }

.sidebar-dl {
  display: block;
  margin: 0;
}

.sidebar-dt {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 10px;
  margin-bottom: 2px;
}

.sidebar-dl > dt:first-child { margin-top: 0; }

.sidebar-dt.sidebar-q-techniques { color: var(--q-techniques); }
.sidebar-dt.sidebar-q-tools      { color: var(--q-tools); }
.sidebar-dt.sidebar-q-platforms  { color: var(--q-platforms); }
.sidebar-dt.sidebar-q-frameworks { color: var(--q-frameworks); }

.sidebar-dd {
  font-size: 11px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

.sidebar-legend-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 4px 0;
  border-top: 1px solid var(--border);
}

.sidebar-legend-title {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 4px;
}

/* ─── Header (kept for fallback, hidden in new layout) ───────────────────── */
.radar-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-logo {
  height: 32px;
  width: auto;
  flex-shrink: 0;
}

.header-text {
  flex: 1;
  min-width: 0;
}

.header-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  margin: 0;
  line-height: 1.2;
}

.header-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin: 2px 0 0;
}

.header-dark-theme-slot {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  padding: 0 16px;
  border-left: 1px solid var(--border);
}

/* dark-theme-toggle: override Bootstrap btn-primary with outline-secondary look */
.header-dark-theme-slot .dark-theme-toggle {
  font-size: 12px;
  padding: 4px 10px;
  /* Override btn-primary to look like btn-outline-secondary */
  background-color: transparent !important;
  border-color: var(--border) !important;
  color: var(--text) !important;
}
.header-dark-theme-slot .dark-theme-toggle:hover {
  background-color: var(--chip-bg) !important;
}
/* Active item inside dropdown matches chip active color */
.header-dark-theme-slot .dropdown-item.active,
.header-dark-theme-slot .dropdown-item:active {
  background-color: var(--chip-active-bg, var(--q-techniques));
  color: #fff;
}

/* Filter bar fills the flex row; dark theme slot stays fixed-width at the right */
.filter-bar {
  flex: 1;
  min-width: 0;
  background: transparent;
  border-bottom: none;
  padding: 10px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.filter-search-wrap {
  position: relative;
  flex: 0 0 220px;
}

.filter-search-wrap .bi-search {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 13px;
  pointer-events: none;
}

.filter-search {
  width: 100%;
  padding: 5px 10px 5px 30px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  outline: none;
  transition: border-color 150ms;
}

.filter-search:focus { border-color: var(--q-techniques); }
.filter-search::placeholder { color: var(--text-muted); }

.filter-sep {
  width: 1px;
  height: 24px;
  background: var(--border);
  flex-shrink: 0;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.filter-group-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-right: 2px;
  white-space: nowrap;
}

/* Base chip style */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  user-select: none;
  transition: background 120ms, color 120ms, border-color 120ms;
  white-space: nowrap;
  line-height: 1.4;
}

.chip:hover { background: var(--chip-bg); }

.chip.active {
  background: var(--q-techniques);
  color: #fff;
  border-color: transparent;
}

/* Quadrant chips get their quadrant color when active */
.chip[data-quadrant="techniques"].active { background: var(--q-techniques); }
.chip[data-quadrant="tools"].active      { background: var(--q-tools); }
.chip[data-quadrant="platforms"].active  { background: var(--q-platforms); }
.chip[data-quadrant="frameworks"].active { background: var(--q-frameworks); }

.chip .chip-remove {
  font-size: 10px;
  line-height: 1;
  opacity: 0.7;
  margin-left: 2px;
}

.chip-clear-all {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  padding: 3px 6px;
  border-radius: 4px;
  border: none;
  background: none;
  transition: color 120ms;
}
.chip-clear-all:hover { color: var(--text); }

/* ── Tag filter Bootstrap dropdowns ──────────────────────────────────────── */
.tag-dropdowns {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.tag-filter-btn {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  transition: background 120ms, border-color 120ms;
}
.tag-filter-btn::after {
  /* Bootstrap caret */
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  border-top: 4px solid currentColor;
  border-right: 4px solid transparent;
  border-left: 4px solid transparent;
  vertical-align: middle;
  margin-left: 2px;
  opacity: 0.6;
}
.tag-filter-btn:hover { background: var(--chip-bg); }
.tag-filter-btn.has-active {
  background: var(--q-techniques);
  color: #fff;
  border-color: transparent;
}
.tag-filter-btn.has-active::after { opacity: 0.8; }

.tag-dropdown-menu {
  min-width: 180px;
  max-height: 260px;
  overflow-y: auto;
  padding: 6px 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.tag-dropdown-menu .dropdown-item {
  font-size: 12px;
  color: var(--text);
  padding: 5px 12px;
  gap: 8px;
  cursor: pointer;
}
.tag-dropdown-menu .dropdown-item:hover,
.tag-dropdown-menu .dropdown-item:focus {
  background: var(--chip-bg);
  color: var(--text);
}
.tag-dropdown-menu .dropdown-item.active,
.tag-dropdown-menu .dropdown-item.active:hover {
  background: var(--chip-bg);
  color: var(--q-techniques);
  font-weight: 600;
}
.tag-dropdown-menu .form-check-input {
  margin: 0;
  flex-shrink: 0;
}

/* Clickable tag values in panel detail view */
.panel-tag-filter {
  cursor: pointer;
  border-radius: 3px;
  transition: background 120ms, color 120ms;
}
.panel-tag-filter:hover {
  background: var(--chip-bg);
  outline: 1px solid var(--border);
}
.panel-tag-filter.filter-active {
  background: var(--q-techniques);
  color: #fff;
}

/* ─── Radar Main ──────────────────────────────────────────────────────────── */
.radar-main {
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 0;
  position: relative;
  overflow: hidden;
}

.radar-container {
  width: min(100%, 820px);
  aspect-ratio: 1;
  flex-shrink: 0;
}

.radar-svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ─── SVG: Ring arcs ──────────────────────────────────────────────────────── */
.ring-arc { transition: opacity 200ms ease; }
.ring-arc-1 { fill: var(--ring-bg-1); }
.ring-arc-2 { fill: var(--ring-bg-2); }
.ring-arc-3 { fill: var(--ring-bg-3); }
.ring-arc-4 { fill: var(--ring-bg-4); }

/* ─── SVG: Gap bars (background-color cross covering the H/V axes) ───────── */
.gap-bar {
  fill: var(--bg);
  pointer-events: none;
}

/* ─── SVG: Labels ─────────────────────────────────────────────────────────── */
.ring-label {
  font-size: 10px;
  fill: var(--ring-label-color);
  font-family: var(--font-body);
  text-anchor: middle;
  pointer-events: none;
  user-select: none;
}

.quadrant-label {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.045em;
  text-transform: uppercase;
  font-family: var(--font-body);
  pointer-events: auto;
  cursor: pointer;
  user-select: none;
  transition: opacity 150ms;
  /* no underline */
}
.quadrant-label:hover { opacity: 0.65; }

/* Dimmed when another quadrant is active */
.quadrant-label-group.quad-dimmed .quadrant-label { opacity: 0.25; }

/* ─── SVG: Nodes ──────────────────────────────────────────────────────────── */
.node-group {
  cursor: pointer;
  transition: opacity 200ms ease;
}

/* Faded state (when another node is hovered, or doesn't match filter) */
.nodes-container.has-hover .node-group:not(.hovered),
.nodes-container.has-filter .node-group.filtered-out {
  opacity: var(--node-fade-opacity);
}

.node-group.filtered-out { opacity: var(--node-fade-opacity); }

.node-group:focus { outline: none; }
.node-group:focus-visible .node-circle { stroke: #2563eb; stroke-width: 2.5px; }

/* Hover scale via CSS transform (applied on the SVG group) */
.node-group:hover .node-hitarea,
.node-group.hovered .node-hitarea {
  /* scale applied in JS via transform attr since SVG transforms differ from CSS */
}

/* The filled node circle */
.node-circle {
  transition: r 150ms ease;
}

/* "new" indicator: outer dashed ring */
.node-new-ring {
  fill: none;
  stroke-dasharray: 3 2;
  stroke-width: 1.5px;
  pointer-events: none;
}

/* "in" / "out" arc arrowhead */
.node-change-arc {
  fill: none;
  stroke-width: 1.5px;
  pointer-events: none;
}

.node-change-arrow {
  pointer-events: none;
}

/* Node number label — font size driven by CSS custom property for ui.node_font_scale support */
.node-label {
  font-family: var(--font-mono);
  font-size: var(--node-font-size, 9px);
  font-weight: 600;
  fill: var(--node-label-fill);
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
  user-select: none;
}

/* 3-digit IDs (100–999) get a smaller font to fit inside the circle */
.node-label.node-label-3d {
  font-size: var(--node-font-size-3d, 6.5px);
}

/* Quadrant fill colors — scoped to .node-circle only (not .node-new-ring) */
.node-circle.node-q-techniques  { fill: var(--q-techniques); }
.node-circle.node-q-tools       { fill: var(--q-tools); }
.node-circle.node-q-platforms   { fill: var(--q-platforms); }
.node-circle.node-q-frameworks  { fill: var(--q-frameworks); }

.node-change-arc.node-q-techniques  { stroke: var(--q-techniques); }
.node-change-arc.node-q-tools       { stroke: var(--q-tools); }
.node-change-arc.node-q-platforms   { stroke: var(--q-platforms); }
.node-change-arc.node-q-frameworks  { stroke: var(--q-frameworks); }

.node-change-arrow.node-q-techniques  { fill: var(--q-techniques); }
.node-change-arrow.node-q-tools       { fill: var(--q-tools); }
.node-change-arrow.node-q-platforms   { fill: var(--q-platforms); }
.node-change-arrow.node-q-frameworks  { fill: var(--q-frameworks); }

.node-new-ring.node-q-techniques  { stroke: var(--q-techniques); }
.node-new-ring.node-q-tools       { stroke: var(--q-tools); }
.node-new-ring.node-q-platforms   { stroke: var(--q-platforms); }
.node-new-ring.node-q-frameworks  { stroke: var(--q-frameworks); }

/* ─── Tooltip ─────────────────────────────────────────────────────────────── */
.node-tooltip {
  position: fixed;
  background: var(--text);
  color: var(--surface);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  pointer-events: none;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 120ms ease;
  z-index: 100;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
}

.node-tooltip.visible { opacity: 1; }

/* ─── Legend (inside sidebar) — single condensed row ──────────────────────── */
.sidebar-legend-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px 0 12px;
  border-top: 1px solid var(--border);
}

.legend-items-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: center;
}

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

.legend-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

/* ─── Detail Panel ────────────────────────────────────────────────────────── */
/* Scrim hidden — panel can be clicked through to reach nodes behind it */
.panel-scrim {
  display: none;
}

.detail-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: var(--panel-width);
  height: 100dvh;
  background: var(--panel-bg);
  box-shadow: var(--panel-shadow);
  z-index: 300;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1);
  border-left: 1px solid var(--border);
}

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

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.panel-close-btn {
  background: none;
  border: none;
  padding: 4px 8px;
  border-radius: 4px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  transition: background 120ms, color 120ms;
}
.panel-close-btn:hover { background: var(--chip-bg); color: var(--text); }

.panel-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

.panel-nav-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 7px;
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  line-height: 1.4;
  transition: background 120ms;
}
.panel-nav-btn:hover { background: var(--chip-bg); }
.panel-nav-btn:disabled { opacity: 0.3; cursor: default; }

.panel-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px 20px 32px;
  outline: none;
}

/* Crossfade animation for panel content transitions */
.panel-content.fade-out { opacity: 0; transition: opacity 80ms ease; }
.panel-content.fade-in  { opacity: 1; transition: opacity 80ms ease; }

/* Panel content elements */
.panel-badge-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.panel-id-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  background: var(--chip-bg);
  border-radius: 4px;
  padding: 2px 8px;
  color: var(--text-muted);
}

.panel-quadrant-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  color: #fff;
}

.panel-q-techniques { background: var(--q-techniques); }
.panel-q-tools      { background: var(--q-tools); }
.panel-q-platforms  { background: var(--q-platforms); }
.panel-q-frameworks { background: var(--q-frameworks); }

.panel-ring-badge {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 100px;
  border: 1px solid transparent;
  color: var(--text);
}

/* Per-ring background colors matching the SVG ring arc fills */
.panel-ring-adopt  { background: var(--ring-bg-1); border-color: var(--ring-bg-3); }
.panel-ring-trial  { background: var(--ring-bg-2); border-color: var(--ring-bg-3); }
.panel-ring-assess { background: var(--ring-bg-3); border-color: var(--ring-bg-4); }
.panel-ring-hold   { background: var(--ring-bg-4); border-color: var(--border); }

.panel-node-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--text);
  line-height: 1.2;
}

.panel-description {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text);
  margin-bottom: 20px;
}

.panel-description a { color: var(--q-techniques); }
.panel-description code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--chip-bg);
  padding: 1px 5px;
  border-radius: 3px;
}

.panel-section-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 8px;
}

.panel-tags {
  margin-bottom: 20px;
}

.panel-tag-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 12px;
  font-size: 13px;
}

.panel-tag-key {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding-top: 3px;
  white-space: nowrap;
}

.panel-tag-value { color: var(--text); }

.panel-tag-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.panel-tag-chip {
  font-size: 11px;
  background: var(--chip-bg);
  border-radius: 4px;
  padding: 2px 7px;
  color: var(--text);
}

.panel-added {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.panel-history {
  margin-bottom: 20px;
}

.history-timeline {
  position: relative;
  padding-left: 20px;
  list-style: none;
  margin: 0;
  padding-bottom: 0;
}

.history-timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--border);
}

.history-item {
  position: relative;
  padding: 0 0 14px 14px;
}

.history-item::before {
  content: '';
  position: absolute;
  left: -13px;
  top: 5px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--panel-bg);
}

.history-item:first-child::before {
  border-color: var(--q-techniques);
  background: var(--q-techniques);
}

.history-date {
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-bottom: 2px;
}

.history-ring-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  margin-bottom: 3px;
}

.history-note {
  font-size: 13px;
  color: var(--text);
  line-height: 1.4;
  margin: 0;
}

/* ─── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .sidebar { width: min(40vw, 360px); }
}

@media (max-width: 640px) {
  .main-row {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    border-left: none;
    border-top: 1px solid var(--border);
    max-height: 220px;
  }
  .filter-bar { padding: 8px 12px; }
  .filter-search-wrap { flex: 0 0 160px; }
  .radar-main { padding: 8px; }
  .detail-panel { width: 100vw; }
}

@media (max-width: 440px) {
  .filter-search-wrap { flex: 1 0 120px; }
}