/* Prism Playground — themeable, three-pane editor + preview UI.
   Self-contained; no third-party CSS. CSS variables drive theming
   so the playground itself can flip light/dark independently of the
   rendered chart theme. */

:root {
  --pg-bg:           #ffffff;
  --pg-bg-elevated:  #f9fafb;
  --pg-bg-sunken:    #f3f4f6;
  --pg-border:       #e5e7eb;
  --pg-border-strong:#d1d5db;
  --pg-text:         #111827;
  --pg-text-muted:   #6b7280;
  --pg-text-faint:   #9ca3af;
  --pg-accent:       #3366cc;
  --pg-accent-soft:  #dbeafe;
  --pg-danger:       #b91c1c;
  --pg-danger-soft:  #fee2e2;
  --pg-success:      #047857;
  --pg-warn:         #b45309;
  --pg-warn-soft:    #fef3c7;
  --pg-mono:         ui-monospace, "SF Mono", "Menlo", "Roboto Mono", monospace;
  --pg-sans:         Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  --pg-radius:       6px;
  --pg-radius-sm:    4px;
  --pg-shadow:       0 1px 2px rgba(0,0,0,0.04);
  --pg-shadow-lg:    0 8px 24px rgba(0,0,0,0.08);
  color-scheme: light;
}

:root[data-pg-theme="dark"] {
  --pg-bg:           #0f172a;
  --pg-bg-elevated:  #1e293b;
  --pg-bg-sunken:    #020617;
  --pg-border:       #334155;
  --pg-border-strong:#475569;
  --pg-text:         #e2e8f0;
  --pg-text-muted:   #94a3b8;
  --pg-text-faint:   #64748b;
  --pg-accent:       #60a5fa;
  --pg-accent-soft:  #1e3a8a;
  --pg-danger:       #f87171;
  --pg-danger-soft:  #7f1d1d;
  --pg-success:      #34d399;
  --pg-warn:         #fbbf24;
  --pg-warn-soft:    #78350f;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--pg-bg);
  color: var(--pg-text);
  font-family: var(--pg-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

button, select {
  font-family: inherit;
  font-size: inherit;
  color: var(--pg-text);
  background: var(--pg-bg-elevated);
  border: 1px solid var(--pg-border);
  border-radius: var(--pg-radius-sm);
  padding: 6px 10px;
  cursor: pointer;
  transition: background-color 0.12s, border-color 0.12s;
}
button:hover, select:hover { background: var(--pg-bg-sunken); border-color: var(--pg-border-strong); }
button:active { transform: translateY(1px); }
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.primary {
  background: var(--pg-accent);
  border-color: var(--pg-accent);
  color: #fff;
}
button.primary:hover { background: var(--pg-accent); filter: brightness(1.05); }
button.icon { padding: 6px 8px; line-height: 1; }

select {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'><path fill='%236b7280' d='M2 4l4 4 4-4z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 6px center;
  padding-right: 24px;
}

kbd {
  font-family: var(--pg-mono);
  font-size: 11px;
  background: var(--pg-bg-sunken);
  border: 1px solid var(--pg-border);
  border-bottom-width: 2px;
  border-radius: 3px;
  padding: 1px 5px;
  color: var(--pg-text-muted);
}

/* ------------------------------------------------------------------ */
/* Layout                                                              */
/* ------------------------------------------------------------------ */

.pg-app {
  display: grid;
  grid-template-rows: auto 1fr;
  height: 100vh;
  overflow: hidden;
}

.pg-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--pg-bg-elevated);
  border-bottom: 1px solid var(--pg-border);
  z-index: 10;
}
.pg-header h1 {
  font-size: 16px;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}
.pg-header h1 .pg-version {
  font-family: var(--pg-mono);
  font-size: 11px;
  font-weight: 400;
  color: var(--pg-text-faint);
  margin-left: 6px;
}
.pg-header .pg-spacer { flex: 1; }
.pg-header .pg-doclinks {
  display: flex;
  gap: 12px;
  font-size: 13px;
}
.pg-header .pg-doclinks a { color: var(--pg-text-muted); }
.pg-header .pg-doclinks a:hover { color: var(--pg-text); }

.pg-body {
  display: grid;
  grid-template-columns: 220px 1fr 1fr;
  min-height: 0;
}
@media (max-width: 1024px) {
  .pg-body { grid-template-columns: 1fr; grid-template-rows: auto 1fr 1fr; }
  .pg-sidebar { max-height: 200px; }
}

/* ------------------------------------------------------------------ */
/* Sidebar (examples)                                                  */
/* ------------------------------------------------------------------ */

.pg-sidebar {
  background: var(--pg-bg-elevated);
  border-right: 1px solid var(--pg-border);
  overflow-y: auto;
  padding: 12px 0;
}
.pg-sidebar h3 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--pg-text-muted);
  margin: 12px 16px 6px;
}
.pg-sidebar h3:first-child { margin-top: 0; }
.pg-sidebar ul { list-style: none; margin: 0; padding: 0; }
.pg-sidebar li {
  padding: 6px 16px;
  font-size: 13px;
  cursor: pointer;
  color: var(--pg-text);
  border-left: 2px solid transparent;
  transition: background-color 0.1s;
}
.pg-sidebar li:hover { background: var(--pg-bg-sunken); }
.pg-sidebar li.active {
  background: var(--pg-accent-soft);
  border-left-color: var(--pg-accent);
  color: var(--pg-text);
  font-weight: 500;
}

/* ------------------------------------------------------------------ */
/* Editor pane                                                         */
/* ------------------------------------------------------------------ */

.pg-pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.pg-pane-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--pg-bg-elevated);
  border-bottom: 1px solid var(--pg-border);
  font-size: 12px;
  color: var(--pg-text-muted);
}
.pg-pane-header .pg-pane-title {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 11px;
}
.pg-pane-header .pg-spacer { flex: 1; }
.pg-pane-header button, .pg-pane-header select {
  padding: 4px 8px;
  font-size: 12px;
}

.pg-editor-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  overflow: hidden;
  border-right: 1px solid var(--pg-border);
}
.pg-editor-gutter {
  flex: 0 0 auto;
  width: 44px;
  background: var(--pg-bg-elevated);
  border-right: 1px solid var(--pg-border);
  padding: 12px 6px 12px 0;
  text-align: right;
  font-family: var(--pg-mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--pg-text-faint);
  user-select: none;
  overflow: hidden;
  white-space: pre;
}
.pg-editor {
  flex: 1;
  font-family: var(--pg-mono);
  font-size: 12.5px;
  line-height: 1.5;
  padding: 12px;
  border: none;
  outline: none;
  resize: none;
  background: var(--pg-bg);
  color: var(--pg-text);
  tab-size: 2;
  -moz-tab-size: 2;
  white-space: pre;
  overflow: auto;
}

.pg-error-bar {
  flex: 0 0 auto;
  max-height: 40%;
  overflow-y: auto;
  border-top: 1px solid var(--pg-border);
  background: var(--pg-bg-elevated);
  font-family: var(--pg-mono);
  font-size: 12px;
}
.pg-error-bar.ok {
  color: var(--pg-success);
  padding: 8px 12px;
  border-top-color: var(--pg-border);
}
.pg-error-bar.error {
  color: var(--pg-danger);
  background: var(--pg-danger-soft);
}
.pg-error-bar .pg-error-head {
  padding: 8px 12px;
  font-weight: 600;
  border-bottom: 1px solid color-mix(in srgb, var(--pg-danger) 25%, transparent);
}
.pg-error-bar .pg-error-msg {
  padding: 8px 12px;
  white-space: pre-wrap;
  word-break: break-word;
}
.pg-error-bar .pg-fixups {
  padding: 0 12px 8px;
}
.pg-error-bar .pg-fixups summary {
  cursor: pointer;
  font-weight: 600;
  padding: 4px 0;
  font-family: var(--pg-sans);
  font-size: 12px;
}
.pg-error-bar .pg-fixups pre {
  margin: 4px 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 11.5px;
}

/* ------------------------------------------------------------------ */
/* Preview pane                                                        */
/* ------------------------------------------------------------------ */

.pg-preview-wrap {
  flex: 1;
  min-height: 0;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--pg-bg-sunken);
}
.pg-preview-wrap[data-chart-theme="dark"] {
  background: #1f2937;
}
.pg-preview-wrap[data-chart-theme="print"] {
  background: #ffffff;
  border-left: 1px solid var(--pg-border);
}

.pg-preview {
  width: 100%;
  max-width: 900px;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pg-preview svg {
  max-width: 100%;
  height: auto;
  background: #fff;
  border-radius: var(--pg-radius);
  box-shadow: var(--pg-shadow-lg);
}
.pg-preview-wrap[data-chart-theme="dark"] .pg-preview svg {
  background: transparent;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.pg-preview-placeholder {
  font-family: var(--pg-mono);
  font-size: 13px;
  color: var(--pg-text-muted);
  text-align: center;
}

.pg-inspector {
  flex: 0 0 auto;
  max-height: 35%;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--pg-border);
  background: var(--pg-bg);
  min-height: 0;
}
.pg-inspector-tabs {
  display: flex;
  gap: 0;
  background: var(--pg-bg-elevated);
  border-bottom: 1px solid var(--pg-border);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.pg-inspector-tabs button {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: 8px 14px;
  color: var(--pg-text-muted);
  font-weight: 600;
  font-size: 11px;
}
.pg-inspector-tabs button:hover { background: var(--pg-bg-sunken); color: var(--pg-text); }
.pg-inspector-tabs button.active {
  color: var(--pg-text);
  border-bottom-color: var(--pg-accent);
  background: var(--pg-bg);
}
.pg-inspector-body {
  flex: 1;
  min-height: 0;
  overflow: auto;
  font-family: var(--pg-mono);
  font-size: 11.5px;
  padding: 10px 14px;
  white-space: pre;
  background: var(--pg-bg);
}
.pg-inspector-body.empty {
  white-space: normal;
  color: var(--pg-text-muted);
  font-family: var(--pg-sans);
  font-size: 13px;
}

/* ------------------------------------------------------------------ */
/* Toasts                                                              */
/* ------------------------------------------------------------------ */

.pg-toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 16px;
  background: var(--pg-text);
  color: var(--pg-bg);
  border-radius: var(--pg-radius);
  font-size: 13px;
  box-shadow: var(--pg-shadow-lg);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s, transform 0.18s;
}
.pg-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ------------------------------------------------------------------ */
/* Loading                                                             */
/* ------------------------------------------------------------------ */

.pg-loading-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--pg-bg) 95%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  z-index: 100;
  transition: opacity 0.25s;
}
.pg-loading-overlay.hidden { opacity: 0; pointer-events: none; }
.pg-spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--pg-border);
  border-top-color: var(--pg-accent);
  border-radius: 50%;
  animation: pg-spin 0.9s linear infinite;
}
@keyframes pg-spin { to { transform: rotate(360deg); } }
.pg-loading-text {
  font-family: var(--pg-mono);
  font-size: 12px;
  color: var(--pg-text-muted);
}

.pg-status {
  font-family: var(--pg-mono);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--pg-bg-sunken);
  color: var(--pg-text-muted);
}
.pg-status.ok { color: var(--pg-success); }
.pg-status.error { color: var(--pg-danger); }
.pg-status.working { color: var(--pg-warn); }