:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --panel-bg: #ffffff;
  --border: #d8dee4;
  --text: #1f2328;
  --text-muted: #59636e;
  --hover-bg: #f0f3f6;
  --selected-bg: #e8f0fe;
  --selected-border: #2563eb;
  --badge-neutral-bg: #eaeef2;
  --badge-neutral-fg: #32383f;
  --fail-fg: #b91c1c;
  --fail-bg: #fef2f2;
  --fail-border: #f87171;
  --warn-fg: #b45309;
  --warn-bg: #fffbeb;
  --warn-border: #fbbf24;
  --ok-fg: #15803d;
  --ok-bg: #f0fdf4;
  --ok-border: #86efac;
  --code-bg: #eff2f5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --panel-bg: #181c22;
    --border: #2b313a;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --hover-bg: #21262d;
    --selected-bg: #1c2d48;
    --selected-border: #58a6ff;
    --badge-neutral-bg: #262c36;
    --badge-neutral-fg: #c9d1d9;
    --fail-fg: #fca5a5;
    --fail-bg: #2d1619;
    --fail-border: #dc2626;
    --warn-fg: #fcd34d;
    --warn-bg: #2b2111;
    --warn-border: #d97706;
    --ok-fg: #86efac;
    --ok-bg: #12261a;
    --ok-border: #22c55e;
    --code-bg: #22272e;
  }
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 13px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
}

.topbar {
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  background: var(--panel-bg);
  border-bottom: 1px solid var(--border);
}

.topbar-left, .topbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.demo-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.demo-bar[hidden] {
  display: none;
}

.demo-bar select {
  font: inherit;
  color: var(--text);
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 6px;
}

.demo-bar a {
  color: var(--selected-border);
}

.brand {
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.01em;
}

.doc-name {
  font-weight: 600;
  font-size: 14px;
}

.doc-path {
  color: var(--text-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 460px;
}

.status-text {
  color: var(--text-muted);
  font-size: 12px;
}

.workspace {
  display: grid;
  grid-template-columns: 280px 1fr 340px;
  height: calc(100vh - 44px);
}

.panel {
  display: flex;
  flex-direction: column;
  background: var(--panel-bg);
  min-height: 0;
}

.panel-left {
  border-right: 1px solid var(--border);
}

.panel-right {
  border-left: 1px solid var(--border);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
}

.panel-header h2 {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.count-pill {
  background: var(--badge-neutral-bg);
  color: var(--badge-neutral-fg);
  font-size: 11px;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 10px;
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 10px 12px;
}

.empty-state {
  color: var(--text-muted);
  padding: 12px 4px;
  font-style: italic;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 1px 7px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  border: 1px solid transparent;
}

.badge-neutral {
  background: var(--badge-neutral-bg);
  color: var(--badge-neutral-fg);
}

.badge-fail {
  background: var(--fail-bg);
  color: var(--fail-fg);
  border-color: var(--fail-border);
}

.badge-warn {
  background: var(--warn-bg);
  color: var(--warn-fg);
  border-color: var(--warn-border);
}

.badge-ok {
  background: var(--ok-bg);
  color: var(--ok-fg);
  border-color: var(--ok-border);
}

/* Tree styles */
.tree-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  margin: 10px 0 4px 0;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.tree-section-title:first-child {
  margin-top: 0;
}

.tree-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.tree-children {
  list-style: none;
  margin: 2px 0 2px 14px;
  padding: 0 0 0 8px;
  border-left: 1px solid var(--border);
}

.tree-item {
  padding: 3px 4px;
  border-radius: 4px;
}

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

.tree-name {
  font-weight: 500;
}

.tree-type {
  font-size: 11px;
  color: var(--text-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

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

.tree-eop {
  color: var(--text-muted);
  font-size: 11.5px;
  padding: 4px 2px;
  letter-spacing: 0.03em;
}

.tree-suppressed {
  opacity: 0.55;
}

/* Viewport */
.viewport-container {
  position: relative;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  background: var(--bg);
}

.viewport {
  width: 100%;
  height: 100%;
}

.viewport canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.selection-banner {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 12px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
  pointer-events: none;
}

.viewport-hint {
  position: absolute;
  bottom: 10px;
  left: 12px;
  color: var(--text-muted);
  font-size: 11.5px;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 4px;
  opacity: 0.88;
  pointer-events: none;
}

/* Findings */
.findings-summary {
  padding: 8px 12px;
  font-size: 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
}

.finding-card {
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 6px;
  padding: 8px 10px;
  margin-bottom: 8px;
  background: var(--panel-bg);
  cursor: pointer;
  transition: background-color 0.1s ease, border-color 0.1s ease;
}

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

.finding-card.severity-fail {
  border-left-color: var(--fail-border);
}

.finding-card.severity-warn {
  border-left-color: var(--warn-border);
}

.finding-card.severity-ok {
  border-left-color: var(--ok-border);
}

.finding-card.active {
  background: var(--selected-bg);
  outline: 1.5px solid var(--selected-border);
}

.finding-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 4px;
}

.finding-rule {
  font-weight: 600;
  font-size: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.finding-msg {
  font-size: 12.5px;
  margin-bottom: 5px;
  word-break: break-word;
}

.finding-loc {
  font-size: 11px;
  color: var(--text-muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--code-bg);
  display: inline-block;
  padding: 1px 6px;
  border-radius: 3px;
}
.mode-switch { margin-left: 12px; font-size: 13px; } .mode-switch a { margin-left: 8px; }

/* Phone width: one column, the 3D view first, then findings and model tree; the page scrolls. */
@media (max-width: 760px) {
  body { overflow: auto; }
  .topbar { height: auto; min-height: 44px; flex-wrap: wrap; gap: 4px 10px; padding: 6px 12px; }
  .topbar-left, .topbar-right, .demo-bar { flex-wrap: wrap; }
  .doc-path { display: none; }
  .mode-switch { margin-left: 0; }
  .workspace { grid-template-columns: 1fr; height: auto; }
  .viewport-container { order: -1; height: 60vh; }
  .panel-left, .panel-right { border: 0; border-top: 1px solid var(--border); }
  .panel-left { order: 1; }
  .viewport-hint { display: none; }
}