File: style.css

/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --bg-tertiary: #334155;
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border: #334155;
  --accent: #3B82F6;
  --danger: #EF4444;
  --success: #22C55E;
  --warning: #F59E0B;
  --purple: #8B5CF6;
  --sidebar-width: 240px;
  --detail-width: 320px;
  --topbar-height: 48px;
}

body {
  font-family: Inter, system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 13px;
  line-height: 1.4;
  height: 100vh;
  overflow: hidden;
}

/* ===== Top Bar ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--topbar-height);
  padding: 0 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  gap: 16px;
  position: relative;
  z-index: 100;
}

.topbar__left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
}

.topbar__title {
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}

.topbar__meta {
  display: flex;
  gap: 12px;
  color: var(--text-muted);
  font-size: 12px;
}

.topbar__center {
  flex: 1;
  max-width: 400px;
}

.topbar__right {
  position: relative;
  flex-shrink: 0;
}

/* ===== Search ===== */
.search-wrapper {
  position: relative;
}

#search-input {
  width: 100%;
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
}

#search-input:focus {
  border-color: var(--accent);
}

#search-input::placeholder {
  color: var(--text-muted);
}

.search-results {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 4px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  max-height: 320px;
  overflow-y: auto;
  z-index: 200;
}

.search-results.visible {
  display: block;
}

.search-list {
  list-style: none;
}

.search-item {
  padding: 8px 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}

.search-item:hover {
  background: var(--bg-tertiary);
}

.search-item mark {
  background: var(--warning);
  color: var(--bg-primary);
  border-radius: 2px;
  padding: 0 1px;
}

.search-empty {
  padding: 12px;
  color: var(--text-muted);
  text-align: center;
}

/* ===== Warnings ===== */
.warnings-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  width: 400px;
  max-height: 300px;
  overflow-y: auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  z-index: 200;
}

.warnings-dropdown.visible {
  display: block;
}

.warnings-ul {
  list-style: none;
}

.warning-item {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

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

.warning-type {
  font-weight: 600;
  color: var(--warning);
  font-size: 11px;
  text-transform: uppercase;
}

.warning-item--cycle .warning-type {
  color: var(--danger);
}

.warning-message {
  color: var(--text-primary);
}

.warning-location {
  color: var(--text-muted);
  font-size: 11px;
}

.warnings-empty {
  padding: 12px;
  color: var(--text-muted);
  text-align: center;
}

.has-warnings {
  color: var(--warning) !important;
}

/* ===== Main Layout ===== */
.main-layout {
  display: flex;
  height: calc(100vh - var(--topbar-height));
}

/* ===== Sidebars ===== */
.sidebar {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  flex-shrink: 0;
}

.sidebar--left {
  width: var(--sidebar-width);
}

.sidebar--right {
  width: var(--detail-width);
  border-right: none;
  border-left: 1px solid var(--border);
}

/* ===== Graph Area ===== */
.graph-area {
  flex: 1;
  position: relative;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

#cy {
  width: 100%;
  flex: 1;
  min-height: 0;
}

/* ===== Namespace Breadcrumb ===== */
.ns-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.breadcrumb-path {
  flex: 1;
  overflow-x: auto;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 2px;
}

.view-mode-toggle {
  flex-shrink: 0;
  padding: 2px 10px;
  font-size: 11px;
  font-family: inherit;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.view-mode-toggle:hover {
  background: var(--border);
  color: var(--text-primary);
}

.view-mode-toggle--active {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  border-color: var(--accent);
  color: var(--accent);
}

.breadcrumb-item {
  cursor: pointer;
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: 4px;
  transition: background 0.15s, color 0.15s;
}

.breadcrumb-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.breadcrumb-item--current {
  color: var(--text-primary);
  font-weight: 600;
  cursor: default;
}

.breadcrumb-item--current:hover {
  background: transparent;
}

.breadcrumb-sep {
  color: var(--text-muted);
  font-size: 14px;
  padding: 0 2px;
  user-select: none;
}

/* ===== Loading Overlay ===== */
.loading-overlay {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.9);
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 12px;
  z-index: 50;
}

.loading-overlay.visible {
  display: flex;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ===== Drop Zone ===== */
.drop-zone {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.95);
  justify-content: center;
  align-items: center;
  z-index: 60;
  cursor: pointer;
}

.drop-zone.visible {
  display: flex;
}

.drop-zone.dragover .drop-zone__content {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.1);
}

.drop-zone__content {
  padding: 48px 64px;
  border: 2px dashed var(--border);
  border-radius: 12px;
  text-align: center;
}

.drop-zone__title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.drop-zone__sub {
  color: var(--text-muted);
}

.drop-zone__hint {
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 16px;
}

.drop-zone__hint code {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: monospace;
  font-size: 12px;
  color: var(--text-secondary);
}

.drop-zone__error {
  color: var(--danger);
  margin-top: 8px;
  min-height: 1em;
}

/* ===== Large Dataset Banner ===== */
.large-dataset-banner {
  display: none;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  border: 1px solid var(--warning);
  border-radius: 6px;
  padding: 6px 16px;
  font-size: 12px;
  color: var(--warning);
  z-index: 40;
  white-space: nowrap;
}

.large-dataset-banner.visible {
  display: block;
}

/* ===== Filters ===== */
.filters {
  padding: 12px;
}

.filter-section {
  margin-bottom: 16px;
}

.filter-section h3 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.filter-check {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 0;
  cursor: pointer;
  font-size: 12px;
}

.filter-check input[type="checkbox"] {
  accent-color: var(--accent);
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 12px;
}

.toggle-label input[type="checkbox"] {
  accent-color: var(--accent);
}

.namespace-actions {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
}

.ns-search-input {
  width: 100%;
  padding: 4px 8px;
  margin-bottom: 6px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 12px;
  outline: none;
}

.ns-search-input:focus {
  border-color: var(--accent);
}

.ns-search-input::placeholder {
  color: var(--text-muted);
}

.namespace-filters {
  max-height: 200px;
  overflow-y: auto;
}

#layout-select {
  width: 100%;
  padding: 6px 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 12px;
}

/* ===== Chips ===== */
.chip {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.chip--class { background: #3B82F6; color: #fff; }
.chip--interface { background: #8B5CF6; color: #fff; }
.chip--trait { background: #F59E0B; color: #fff; }
.chip--enum { background: #10B981; color: #fff; }
.chip--external { background: #6B7280; color: #fff; }
.chip--cycle { background: var(--danger); color: #fff; }
.chip--weight { background: #334155; color: var(--text-secondary); }
.chip--namespace { background: #0F4C81; color: #93C5FD; }
.chip--xs { padding: 1px 5px; font-size: 10px; }

/* ===== Detail Panel ===== */
.detail-panel {
  padding: 16px;
}

.detail-empty {
  color: var(--text-muted);
  text-align: center;
  padding: 32px 16px;
}

.detail-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.detail-title {
  font-size: 14px;
  font-weight: 600;
  word-break: break-all;
  margin-bottom: 4px;
}

.detail-file {
  font-size: 11px;
  color: var(--text-muted);
  word-break: break-all;
  margin-bottom: 12px;
}

.detail-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
}

.detail-metrics--3 {
  grid-template-columns: 1fr 1fr 1fr;
}

.metric {
  background: var(--bg-tertiary);
  border-radius: 6px;
  padding: 10px;
  text-align: center;
}

.metric-value {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}

.metric-label {
  font-size: 11px;
  color: var(--text-muted);
}

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

.detail-section h4 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

.depth-controls {
  display: flex;
  gap: 6px;
}

.detail-list {
  list-style: none;
}

.detail-list-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 0;
  cursor: pointer;
  font-size: 12px;
  border-bottom: 1px solid var(--border);
}

.detail-list-item:hover {
  color: var(--accent);
}

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

.detail-list-item--static {
  cursor: default;
}

.detail-list-item--static:hover {
  color: var(--text-primary);
}

/* ===== Instability Metric ===== */
.detail-instability {
  margin: 12px 0;
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border-radius: 6px;
}

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

.instability-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.instability-value {
  font-size: 12px;
  font-weight: 700;
}

.instability-bar-bg {
  height: 4px;
  background: var(--bg-primary);
  border-radius: 2px;
  overflow: hidden;
}

.instability-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.3s ease;
}

.instability-hint {
  margin-top: 5px;
  font-size: 10px;
  color: var(--text-muted);
}

.edge-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  padding: 1px 5px;
  background: var(--bg-tertiary);
  border-radius: 10px;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.edge-type {
  font-size: 10px;
  color: var(--text-muted);
  min-width: 70px;
}

.edge-target {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.edge-confidence {
  font-size: 10px;
  font-weight: 500;
}

.conf--certain { color: var(--success); }
.conf--high { color: var(--accent); }
.conf--medium { color: var(--warning); }
.conf--low { color: var(--danger); }

/* ===== Buttons ===== */
.btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s;
}

.btn:hover {
  background: var(--border);
}

.btn--sm {
  padding: 4px 10px;
  font-size: 11px;
}

.btn--active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: #2563EB;
  border-color: #2563EB;
}

.btn--full {
  width: 100%;
  justify-content: center;
}

.btn--ghost {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
}

.btn--ghost:hover {
  color: var(--text-primary);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Large dataset warning banner */
.large-dataset-banner {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  background: #78350f;
  color: #fde68a;
  font-size: 12px;
  padding: 6px 16px;
  border-radius: 6px;
  border: 1px solid #92400e;
  z-index: 10;
  white-space: nowrap;
  pointer-events: none;
}