:root {
  color-scheme: light;
  --violet: #7c3aed;
  --violet-light: #ede9fe;
  --border: #e2e8f0;
  --muted: #64748b;
  --bg: #f8fafc;
  --card: #ffffff;
  --ink: #0f172a;
}
* {
  box-sizing: border-box;
}
body {
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: grid;
  grid-template-columns:
    var(--left-col, 380px)
    minmax(0, 1fr)
    var(--right-col, 340px);
}
body.left-collapsed {
  --left-col: 56px;
}
body.right-collapsed {
  --right-col: 56px;
}

/* ---------- Side panels (shared) ---------- */
.playground,
.dev-panel {
  background: var(--card);
  position: sticky;
  top: 0;
  height: 100vh;
  /* Intentionally no overflow:hidden so the collapse buttons can overflow
     the outer edge. The scroll container is .panel-body. */
  transition: background-color 0.2s;
}
.playground {
  border-right: 1px solid var(--border);
}
.dev-panel {
  border-left: 1px solid var(--border);
}
.playground .panel-body,
.dev-panel .panel-body {
  height: 100%;
  overflow-y: auto;
  padding: 1.25rem 1.25rem 2rem;
  transition: opacity 0.15s;
}
body.left-collapsed .playground .panel-body,
body.right-collapsed .dev-panel .panel-body {
  opacity: 0;
  pointer-events: none;
}

/* Collapse toggle button — edge strip when closed, pill when open */
.panel-collapse-btn {
  position: absolute;
  top: 14px;
  z-index: 5;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--muted);
  cursor: pointer;
  line-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.08);
  transition:
    transform 0.2s,
    background-color 0.15s,
    color 0.15s;
}
.panel-collapse-btn:hover {
  color: var(--ink);
  background: #f1f5f9;
}
.dev-panel .panel-collapse-btn {
  left: -19px;
}
.playground .panel-collapse-btn {
  right: -19px;
}
.collapse-arrow {
  display: inline-block;
  width: 18px;
  height: 18px;
  transition: transform 0.2s;
}
body.left-collapsed .playground .collapse-arrow {
  transform: rotate(180deg);
}
body.right-collapsed .dev-panel .collapse-arrow {
  transform: rotate(180deg);
}

/* Vertical label shown on the edge strip while a panel is collapsed.
   Horizontally centered in the strip; sits below the collapse button. */
.panel-collapsed-label {
  position: absolute;
  top: 90px;
  left: 50%;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s 0.1s;
  white-space: nowrap;
  user-select: none;
  transform-origin: center center;
}
.playground .panel-collapsed-label {
  transform: translateX(-50%) rotate(90deg);
}
.dev-panel .panel-collapsed-label {
  transform: translateX(-50%) rotate(-90deg);
}
body.left-collapsed .playground .panel-collapsed-label,
body.right-collapsed .dev-panel .panel-collapsed-label {
  opacity: 1;
}

.playground__legacy {
  background: var(--card);
  border-right: 1px solid var(--border);
  padding: 1.25rem 1.25rem 2rem;
  overflow-y: auto;
  position: sticky;
  top: 0;
  height: 100vh;
}
.playground h2 {
  font-size: 0.95rem;
  margin: 0 0 0.25rem;
}
.playground .lead {
  color: var(--muted);
  font-size: 0.8rem;
  margin: 0 0 1rem;
}
.playground details {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0;
  margin-bottom: 0.5rem;
  background: #fafbfc;
}
.playground details[open] {
  background: #fff;
}
.playground summary {
  cursor: pointer;
  padding: 0.6rem 0.8rem;
  font-weight: 600;
  font-size: 0.82rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.playground summary::-webkit-details-marker {
  display: none;
}
.playground summary::after {
  content: '+';
  color: var(--muted);
  font-weight: 400;
  transition: transform 0.2s;
}
.playground details[open] summary::after {
  content: '\2013'; /* en-dash via Unicode escape — reliable across fonts */
}
.playground .section-body {
  padding: 0 0.8rem 0.8rem;
  display: grid;
  gap: 0.55rem;
}
.field {
  display: grid;
  gap: 0.2rem;
}
.field label {
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.field input[type='text'],
.field input[type='number'],
.field input[type='url'],
.field select,
.field textarea {
  font: inherit;
  font-size: 0.85rem;
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
}
.field input[type='color'] {
  width: 100%;
  height: 34px;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
}
.field textarea {
  min-height: 60px;
  resize: vertical;
}
.field .row {
  display: flex;
  gap: 0.4rem;
}
.field .row > * {
  flex: 1;
}
.field .slider-row {
  display: flex;
  width: 100%;
  gap: 0.5rem;
  align-items: center;
}
.field .slider-row input[type='range'] {
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
  accent-color: var(--violet);
}
.field .slider-row input[type='number'] {
  flex: 0 0 72px;
  width: 72px;
}
.toggle {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.3rem 0;
}
.toggle span {
  font-size: 0.85rem;
}
.toggle input[type='checkbox'] {
  transform: scale(1.15);
  cursor: pointer;
}

/* JSON export — sticky to the bottom of the sidebar */
.export-bar {
  position: sticky;
  bottom: -2rem;
  background: var(--card);
  padding: 0.75rem 1.25rem;
  margin: 1rem -1.25rem -2rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 0.4rem;
  z-index: 10;
}
.btn {
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.45rem 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  transition: 0.15s;
}
.btn:hover {
  background: #f1f5f9;
}
.btn-primary {
  background: var(--violet);
  border-color: var(--violet);
  color: #fff;
}
.btn-primary:hover {
  background: #6d28d9;
}
.btn-sm {
  padding: 0.3rem 0.55rem;
  font-size: 0.75rem;
}
.json-panel {
  margin-top: 1rem;
}
.json-panel pre {
  background: #0f172a;
  color: #e2e8f0;
  padding: 0.75rem;
  border-radius: 6px;
  font-size: 11px;
  max-height: 260px;
  overflow: auto;
  margin: 0;
  white-space: pre;
}
.copy-toast {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  background: #111827;
  color: #fff;
  padding: 0.55rem 0.9rem;
  border-radius: 6px;
  font-size: 0.8rem;
  opacity: 0;
  transform: translateY(10px);
  transition: 0.2s;
  pointer-events: none;
  z-index: 10000;
}
.copy-toast.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Main content ---------- */
main.docs {
  padding: 1rem 3rem;
  overflow-x: hidden;
}
.docs-inner {
  max-width: 880px;
}
.docs-title {
  font-size: 1.6rem;
  margin: 0 0 0.25rem;
}
.subtitle {
  color: var(--muted);
  margin: 0 0 2rem;
}
.docs-loading {
  color: var(--muted);
  font-size: 0.95rem;
  min-height: calc(100vh - 4rem);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  margin: 0;
}

/* ---------- Dev panel content ---------- */
.dev-panel h2 {
  font-size: 0.95rem;
  margin: 0 0 0.25rem;
}
.dev-panel .lead {
  color: var(--muted);
  font-size: 0.8rem;
  margin: 0 0 1rem;
}
.dev-panel details {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0;
  margin-bottom: 0.5rem;
  background: #fafbfc;
}
.dev-panel details[open] {
  background: #fff;
}
.dev-panel summary {
  cursor: pointer;
  padding: 0.6rem 0.8rem;
  font-weight: 600;
  font-size: 0.82rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}
.dev-panel summary::-webkit-details-marker {
  display: none;
}
.dev-panel summary::after {
  content: '+';
  color: var(--muted);
  font-weight: 400;
}
.dev-panel details[open] summary::after {
  content: '\2013'; /* en-dash via Unicode escape — reliable across fonts */
}
.dev-panel .section-body {
  padding: 0 0.8rem 0.8rem;
}
.mocked-list {
  padding-left: 1.2rem;
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}
.mocked-list li {
  margin: 0.2rem 0;
}
.dev-panel pre#log {
  background: #0f172a;
  color: #e2e8f0;
  padding: 0.75rem;
  border-radius: 6px;
  font-size: 11px;
  max-height: 420px;
  overflow: auto;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

.badge {
  display: inline-block;
  background: var(--violet-light);
  color: #6d28d9;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-left: 0.5rem;
}

/* ---------- Rendered README (GitHub-ish) ---------- */
.markdown-body {
  color: var(--ink);
  font-size: 0.92rem;
  line-height: 1.6;
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin-top: 1.6em;
  margin-bottom: 0.6em;
  line-height: 1.25;
}
.markdown-body h1 {
  font-size: 1.55em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3em;
}
.markdown-body h2 {
  font-size: 1.25em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.3em;
}
.markdown-body h3 {
  font-size: 1.08em;
}
.markdown-body h4 {
  font-size: 0.95em;
}
.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote {
  margin: 0 0 1em;
}
.markdown-body ul,
.markdown-body ol {
  padding-left: 1.4em;
}
.markdown-body li + li {
  margin-top: 0.25em;
}
.markdown-body a {
  color: var(--violet);
  text-decoration: none;
}
.markdown-body a:hover {
  text-decoration: underline;
}
.markdown-body code {
  background: #f1f5f9;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.markdown-body pre {
  background: #0d1117;
  padding: 1rem 1.1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 0 0 1em;
  font-size: 0.82em;
  line-height: 1.55;
  border: 1px solid #1f2937;
}
.markdown-body pre code,
.markdown-body pre code.hljs {
  background: transparent;
  padding: 0;
  font-size: inherit;
  display: block;
}
/* highlight.js github-dark loads globally but the cdn stylesheet only
   targets .hljs; ensure our rendered code blocks pick it up. */
.markdown-body pre code {
  color: #e6edf3;
}
.markdown-body blockquote {
  border-left: 4px solid var(--violet);
  background: var(--violet-light);
  padding: 0.6em 1em;
  border-radius: 0 6px 6px 0;
  color: #4c1d95;
}
.markdown-body blockquote p {
  margin: 0.2em 0;
}
.markdown-body table {
  border-collapse: collapse;
  margin: 0 0 1em;
  font-size: 0.86em;
  display: block;
  overflow-x: auto;
  max-width: 100%;
}
.markdown-body th,
.markdown-body td {
  border: 1px solid var(--border);
  padding: 0.5em 0.8em;
  text-align: left;
  vertical-align: top;
}
.markdown-body th {
  background: #f1f5f9;
  font-weight: 600;
}
.markdown-body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}
.markdown-body img {
  max-width: 100%;
}

@media (max-width: 1100px) {
  :root {
    --right-col: 0px;
  }
  .dev-panel {
    display: none;
  }
}
@media (max-width: 900px) {
  body {
    grid-template-columns: 1fr;
  }
  .playground {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
  .playground .panel-collapse-btn {
    display: none;
  }
  main.docs {
    padding: 1.5rem;
  }
}