/*
 * open.blog base stylesheet.
 *
 * This file contains structure and behaviour only. Every colour, font, size,
 * radius and spacing decision is a --ob-* custom property written by the
 * active theme (see themes/<name>/theme.json). To restyle the blog, change the
 * theme's tokens, or add rules to the theme's own stylesheet.
 */

*,
*::before,
*::after {
  box-sizing: border-box;
}

.ob-field-journal,
.ob-video-production {
  margin-block: var(--ob-space-6, 2rem);
  padding: var(--ob-space-5, 1.5rem);
  border: 1px solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius, 0.5rem);
}

.ob-field-journal dl,
.ob-video-production dl {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 1rem;
}

.ob-field-journal dt,
.ob-video-production dt,
.ob-field-journal figcaption {
  font-size: 0.85em;
  color: var(--ob-color-muted, inherit);
}

.ob-field-journal dd,
.ob-video-production dd {
  margin: 0.2rem 0 0;
  font-weight: 650;
}

.ob-field-journal svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 5rem;
}

.ob-field-journal polyline {
  fill: none;
  stroke: currentColor;
  stroke-width: 4;
  vector-effect: non-scaling-stroke;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: var(--ob-color-outer, var(--ob-color-page));
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--ob-color-page);
  color: var(--ob-color-text);
  font-family: var(--ob-font-body);
  font-size: var(--ob-body-size);
  line-height: var(--ob-body-leading);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  flex: 1 0 auto;
}

main:focus {
  outline: none;
}

img,
svg,
video {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--ob-color-link);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--ob-color-accent);
}

:focus-visible {
  outline: var(--ob-focus-ring);
  outline-offset: 4px;
}

code,
kbd,
pre,
samp {
  font-family: var(--ob-font-mono);
}

.ob-skip {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  background: var(--ob-color-ink);
  color: #fff;
}

.ob-skip:focus {
  top: 1rem;
}

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

.ob-container {
  width: min(var(--ob-max-width), 100% - 2 * var(--ob-gutter));
  margin: 0 auto;
  padding-block: 2rem 4rem;
}

.ob-container-reading {
  width: min(var(--ob-reading-width), 100% - 2 * var(--ob-gutter));
}

.ob-section {
  margin-block: 3rem;
}

/* ---------- Header ---------- */

.ob-header {
  border-bottom: var(--ob-border-width) solid var(--ob-color-border);
}

.ob-header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.5rem;
  width: min(var(--ob-max-width), 100% - 2 * var(--ob-gutter));
  margin: 0 auto;
  padding-block: 0.5rem;
}

.ob-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 44px;
  color: var(--ob-color-text);
  font-family: var(--ob-font-heading);
  font-weight: var(--ob-heading-weight);
  text-decoration: none;
}

.ob-brand:hover {
  color: var(--ob-color-accent);
}

.ob-brand-logo {
  width: 54px;
  height: 40px;
  object-fit: contain;
  border-radius: var(--ob-radius-sm);
}

.ob-nav {
  flex: 1 1 0;
  min-width: 0;
}

.ob-nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ob-nav-link {
  display: block;
  min-height: 44px;
  padding: 0.7rem 0.25rem;
  color: var(--ob-color-text);
  text-decoration: none;
}

.ob-nav-link:hover,
.ob-nav-link[aria-current="page"] {
  color: var(--ob-color-accent-soft);
}

@media (prefers-reduced-motion: no-preference) {
  .ob-nav-link {
    transition: transform var(--ob-motion) ease-out;
  }

  .ob-nav-link:is(:hover, :focus-visible) {
    transform: translateX(6px);
  }
}

.ob-icon-button {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: var(--ob-border-width) solid var(--ob-color-accent-border);
  border-radius: 50%;
  background: transparent;
  color: var(--ob-color-accent-soft);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
}

.ob-icon-button:hover {
  background: var(--ob-color-accent);
  color: var(--ob-color-accent-contrast);
}

/* ---------- Headings ---------- */

.ob-title,
.ob-prose h1,
.ob-prose h2,
.ob-prose h3,
.ob-prose h4,
.ob-prose h5,
.ob-prose h6 {
  font-family: var(--ob-font-heading);
  font-weight: var(--ob-heading-weight);
  line-height: var(--ob-heading-leading);
  letter-spacing: var(--ob-heading-tracking);
  text-transform: var(--ob-heading-transform);
  text-wrap: balance;
  overflow-wrap: anywhere;
}

h1.ob-title {
  margin: 0.5rem 0 1rem;
  font-size: var(--ob-title-size);
}

h2.ob-title {
  margin: 0.5rem 0 1rem;
  font-size: var(--ob-section-title-size);
}

.ob-heading {
  margin-bottom: 1.5rem;
}

.ob-code-label {
  display: block;
  color: var(--ob-color-muted);
  font-family: var(--ob-font-body);
  font-size: 0.875rem;
}

.ob-eyebrow {
  margin: 0;
  color: var(--ob-color-muted);
  font-size: 0.875rem;
}

.ob-post-subtitle {
  max-width: 62ch;
  margin: 0.25rem 0 0.75rem;
  color: var(--ob-color-muted);
  font-family: var(--ob-font-heading);
  font-size: 1.25rem;
  line-height: 1.4;
}

.ob-lede {
  max-width: 62ch;
  color: var(--ob-color-muted);
}

.ob-meta {
  color: var(--ob-color-muted);
  font-size: 0.875rem;
}

.ob-empty {
  color: var(--ob-color-muted);
}

/* ---------- Lists ---------- */

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

/* Rows: a compact list with a hover fill, as on the mnix.dev blog section. */
.ob-list-rows {
  border-bottom: var(--ob-row-border-width) solid var(--ob-color-accent-soft);
}

.ob-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(0.75rem, 4vw, 3rem);
  border-top: var(--ob-row-border-width) solid var(--ob-color-accent-soft);
  color: var(--ob-color-text);
  text-decoration: none;
}

.ob-row:hover,
.ob-row:focus-visible {
  background: var(--ob-color-accent);
  color: var(--ob-hover-text);
}

.ob-row:hover .ob-meta,
.ob-row:focus-visible .ob-meta,
.ob-row:hover .ob-row-title,
.ob-row:focus-visible .ob-row-title {
  color: var(--ob-color-ink);
}

.ob-row-title {
  margin: 0;
  font-family: var(--ob-font-heading);
  font-size: var(--ob-row-title-size);
  font-weight: var(--ob-heading-weight);
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.ob-row-body {
  display: block;
  min-width: 0;
}

.ob-row-body .ob-meta {
  display: block;
  margin-top: 0.5rem;
}

.ob-row-arrow {
  flex: none;
  font-size: 1.75rem;
  line-height: 1;
}

@media (prefers-reduced-motion: no-preference) {
  .ob-row-arrow {
    transition: transform var(--ob-motion) ease-out;
  }

  .ob-row:is(:hover, :focus-visible) .ob-row-arrow {
    transform: translateX(8px);
  }
}

/* Cards: a responsive grid with optional cover images. */
.ob-list-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr));
  gap: 1.25rem;
}

.ob-card {
  min-width: 0;
  overflow: hidden;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius);
  background: var(--ob-color-surface);
}

.ob-card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  color: inherit;
  text-decoration: none;
}

.ob-card:hover {
  border-color: var(--ob-color-accent-border);
  box-shadow: var(--ob-shadow);
}

.ob-card-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--ob-color-surface-raised);
}

.ob-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem 1.1rem 1.25rem;
}

.ob-card-title {
  margin: 0;
  font-family: var(--ob-font-heading);
  font-size: 1.2rem;
  font-weight: var(--ob-heading-weight);
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.ob-card:hover .ob-card-title {
  color: var(--ob-color-accent-soft);
}

.ob-card-summary {
  color: var(--ob-color-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- Tags ---------- */

.ob-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
}

.ob-tags a {
  display: inline-block;
  padding: 0.15rem 0.7rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: 999px;
  color: var(--ob-color-muted);
  font-size: 0.85rem;
  text-decoration: none;
}

.ob-tags a:hover {
  border-color: var(--ob-color-accent-border);
  color: var(--ob-color-accent-soft);
}

.ob-count {
  color: var(--ob-color-subtle);
}

/* ---------- Post ---------- */

.ob-post-header {
  margin-bottom: 2rem;
}

.ob-post-header .ob-meta {
  margin: 0;
}

.ob-cover {
  margin: 0 0 2rem;
}

.ob-cover img {
  display: block;
  width: 100%;
  border-radius: var(--ob-radius);
}

.ob-toc {
  margin: 0 0 2rem;
  padding: 0.75rem 1.1rem;
  border-left: 2px solid var(--ob-color-accent-border);
  background: var(--ob-color-surface-raised);
  border-radius: 0 var(--ob-radius-sm) var(--ob-radius-sm) 0;
}

.ob-toc summary {
  cursor: pointer;
  font-weight: 600;
}

.ob-toc ol {
  margin: 0.75rem 0 0.25rem;
  padding-left: 1.25rem;
}

.ob-toc .ob-toc-l3 {
  margin-left: 1rem;
  list-style-type: circle;
}

.ob-work-meta {
  margin: 0 0 1.5rem;
  padding: 0.85rem 1rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-surface-raised);
}

.ob-work-meta dl {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  margin: 0;
}

.ob-work-meta dt {
  color: var(--ob-color-subtle);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ob-work-meta dd {
  margin: 0.1rem 0 0;
  overflow-wrap: anywhere;
}

.ob-contributions {
  margin: 0 0 1.5rem;
  padding: 0.85rem 1rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-surface-raised);
}

.ob-contributions-title {
  margin: 0 0 0.65rem;
  font-family: var(--ob-font-heading);
  font-size: 1rem;
}

.ob-contributions ul {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ob-contributor-name {
  font-weight: 600;
}

.ob-contributor-roles {
  color: var(--ob-color-muted);
}

.ob-contributor-roles::before {
  content: " — ";
}

.ob-orcid {
  margin: 0.2rem 0 0;
  color: var(--ob-color-muted);
  font-size: 0.8rem;
  overflow-wrap: anywhere;
}

.ob-orcid a {
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
}

.ob-orcid-icon {
  display: inline-block;
  flex: 0 0 24px;
  width: 24px;
  height: 24px;
  overflow: hidden;
}

.ob-orcid-icon img {
  display: block;
  width: auto;
  max-width: none;
  height: 48px;
  transform: translate(-12px, -12px);
}

.ob-source {
  color: var(--ob-color-muted);
  font-size: 0.9rem;
}

/* ---------- Prose (rendered Markdown) ---------- */

.ob-prose {
  overflow-wrap: break-word;
}

.ob-prose > :first-child {
  margin-top: 0;
}

.ob-prose h2 {
  margin: 2.5em 0 0.6em;
  font-size: 1.6em;
}

.ob-prose h3 {
  margin: 2em 0 0.5em;
  font-size: 1.25em;
}

.ob-prose h4,
.ob-prose h5,
.ob-prose h6 {
  margin: 1.6em 0 0.4em;
  font-size: 1.05em;
}

.ob-prose p,
.ob-prose ul,
.ob-prose ol,
.ob-prose blockquote,
.ob-prose pre,
.ob-prose table,
.ob-prose figure {
  margin: 1.1em 0;
}

.ob-prose li + li {
  margin-top: 0.35em;
}

.ob-prose hr {
  margin: 2.5em 0;
  border: 0;
  border-top: var(--ob-border-width) solid var(--ob-color-border);
}

.ob-prose blockquote {
  padding: 0.1em 1.1em;
  border-left: 3px solid var(--ob-color-accent-border);
  color: var(--ob-color-muted);
}

.ob-prose code {
  padding: 0.12em 0.4em;
  border-radius: 4px;
  background: var(--ob-color-code-bg);
  color: var(--ob-color-code-text);
  font-size: 0.9em;
}

.ob-prose pre {
  position: relative;
  overflow-x: auto;
  padding: 1rem 1.2rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-code-bg);
  color: var(--ob-color-code-text);
  font-size: 0.9rem;
  line-height: 1.6;
  tab-size: 4;
}

.ob-prose pre code {
  padding: 0;
  background: none;
  font-size: inherit;
}

.ob-prose img {
  display: block;
  margin: 1.5em auto;
  border-radius: var(--ob-radius-sm);
}

.ob-prose table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.ob-prose th,
.ob-prose td {
  padding: 0.5rem 0.8rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  text-align: left;
}

.ob-prose th {
  background: var(--ob-color-surface-raised);
}

.ob-prose input[type="checkbox"] {
  margin-right: 0.5em;
}

.ob-heading-anchor {
  margin-left: 0.4em;
  color: var(--ob-color-subtle);
  font-weight: 400;
  text-decoration: none;
  opacity: 0;
}

.ob-prose :is(h2, h3, h4, h5, h6):hover .ob-heading-anchor,
.ob-heading-anchor:focus {
  opacity: 1;
}

.ob-prose :is(h2, h3, h4, h5, h6) {
  scroll-margin-top: 1.5rem;
}

.footnote-definition {
  display: flex;
  gap: 0.5em;
  margin: 0.5em 0;
  font-size: 0.9em;
  color: var(--ob-color-muted);
}

.footnote-definition p {
  margin: 0;
}

/* ---------- Syntax highlighting (tokens painted by <ob-code highlight>) ---------- */

.tok-keyword { color: var(--ob-color-code-keyword); }
.tok-string { color: var(--ob-color-code-string); }
.tok-comment { color: var(--ob-color-code-comment); font-style: italic; }
.tok-number { color: var(--ob-color-code-number); }
.tok-function { color: var(--ob-color-code-function); }
.tok-type { color: var(--ob-color-code-type); }
.tok-attr { color: var(--ob-color-code-attr); }
.tok-tag { color: var(--ob-color-code-tag); }
.tok-meta { color: var(--ob-color-code-meta); }
.tok-variable { color: var(--ob-color-code-variable); }
.tok-prompt { color: var(--ob-color-code-comment); user-select: none; }
/* Finer tokens; a theme that predates them falls back to an older colour. */
.tok-property { color: var(--ob-color-code-property, var(--ob-color-code-attr)); }
.tok-operator { color: var(--ob-color-code-operator, var(--ob-color-code-variable)); }
.tok-punctuation { color: var(--ob-color-code-punctuation, inherit); }
.tok-constant { color: var(--ob-color-code-constant, var(--ob-color-code-number)); }
.tok-regex { color: var(--ob-color-code-regex, var(--ob-color-code-string)); }

/* Line numbers (added by <ob-code line-numbers>). They are a CSS counter, not
   text, so copying the code never includes them. */
.ob-prose code.ob-numbered {
  counter-reset: ob-line;
}

.ob-numbered .ob-line::before {
  display: inline-block;
  min-width: calc(var(--ob-line-digits, 2) * 1ch);
  margin-right: 1.6ch;
  color: var(--ob-color-code-line-number, var(--ob-color-subtle));
  text-align: right;
  content: counter(ob-line);
  counter-increment: ob-line;
  opacity: 0.75;
  user-select: none;
}

/* Lines a fence marks with {2,4-6}: a full-width band with an accent edge.
   The band is neutral so token colours keep their contrast. */
.ob-prose pre > code.ob-has-hl {
  display: inline-block;
  min-width: 100%;
}

.ob-line-hl {
  display: inline-block;
  min-width: calc(100% + 2.4rem);
  margin-inline: -1.2rem;
  padding-inline: calc(1.2rem - 3px) 1.2rem;
  border-left: 3px solid var(--ob-color-accent);
  background: color-mix(in srgb, var(--ob-color-text) 4%, transparent);
}

/* ```js title="app.js" puts a caption bar on top of the block. */
.ob-prose .ob-code-block {
  margin: 1.1em 0;
}

.ob-code-block pre {
  margin: 0;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

.ob-code-title {
  padding: 0.45rem 1.2rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-bottom: 0;
  border-radius: var(--ob-radius-sm) var(--ob-radius-sm) 0 0;
  background: var(--ob-color-surface-raised);
  color: var(--ob-color-muted);
  font-family: var(--ob-font-mono);
  font-size: 0.8rem;
  overflow-wrap: anywhere;
}

/* ---------- Editable code: runnable fences and web sandboxes ---------- */

ob-rust-playground {
  display: block;
  margin: 1.1em 0;
}

ob-code-runner {
  display: block;
  margin: 1.1em 0;
}

.ob-code-block ob-code-runner { margin: 0; }

ob-code-runner[data-enhanced="true"] > pre.ob-code-runner-source { display: none; }

.ob-code-runner-stdin,
.ob-code-runner-output {
  box-sizing: border-box;
  width: 100%;
  padding: 0.8rem 1rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-code-bg);
  color: var(--ob-color-code-text);
  font-family: var(--ob-font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
  tab-size: 4;
}

.ob-code-runner-stdin { min-height: 4.5rem; margin-top: 0.65rem; resize: vertical; }
.ob-code-runner-output { margin-top: 0.65rem; overflow: auto; max-height: 28rem; white-space: pre-wrap; }

.ob-code-block ob-rust-playground {
  margin: 0;
}

/* The original highlighted block remains visible if JavaScript is disabled or
   the enhancement fails to load. */
ob-rust-playground[data-enhanced="true"] > pre.ob-rust-source {
  display: none;
}

.ob-code-editor-shell {
  overflow: hidden;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-code-bg);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--ob-color-code-text) 5%, transparent);
}

.ob-code-block .ob-code-editor-shell {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

.ob-code-editor-shell:focus-within {
  border-color: var(--ob-color-accent);
  outline: 2px solid color-mix(in srgb, var(--ob-color-accent) 35%, transparent);
  outline-offset: 2px;
}

.ob-code-editor-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 2.25rem;
  padding: 0.35rem 0.75rem;
  border-bottom: var(--ob-border-width) solid var(--ob-color-border);
  background: color-mix(in srgb, var(--ob-color-code-bg) 82%, var(--ob-color-surface-raised));
  color: var(--ob-color-muted);
  font-family: var(--ob-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.ob-code-editor-live {
  display: inline-flex;
  gap: 0.25rem;
  align-items: center;
  color: var(--ob-color-accent);
  font-weight: 700;
}

.ob-code-cursor {
  display: inline-block;
  font-size: 1rem;
  line-height: 0.7;
  animation: ob-code-cursor-blink 1s steps(1, end) infinite;
}

@keyframes ob-code-cursor-blink {
  50% { opacity: 0; }
}

.ob-code-editor-stack {
  position: relative;
  min-height: 10rem;
}

.ob-prose .ob-code-editor-decoration,
.ob-code-editor {
  box-sizing: border-box;
  width: 100%;
  min-height: 10rem;
  margin: 0;
  padding: 1rem 1.2rem;
  border: 0;
  border-radius: 0;
  color: var(--ob-color-code-text);
  font-family: var(--ob-font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
  tab-size: 4;
  white-space: pre;
}

.ob-prose .ob-code-editor-decoration {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  scrollbar-width: none;
}

.ob-code-editor {
  position: relative;
  display: block;
  resize: vertical;
  overflow: auto;
  border: 0;
  outline: 0;
  background: transparent;
  color: transparent;
  caret-color: var(--ob-color-code-text);
  -webkit-text-fill-color: transparent;
  cursor: text;
}

.ob-code-editor-shell[data-line-numbers="true"] .ob-code-editor {
  padding-left: calc(1.2rem + var(--ob-code-line-digits, 2) * 1ch + 1.6ch);
}

.ob-code-editor::selection {
  background: color-mix(in srgb, var(--ob-color-accent) 35%, transparent);
}

.ob-code-editor-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin-top: 0.65rem;
}

.ob-code-editor-controls button,
.ob-web-sandbox-tab,
.ob-rust-external {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  padding: 0.35rem 0.75rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-surface-raised);
  color: var(--ob-color-text);
  font: inherit;
  font-size: 0.82rem;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
}

.ob-code-editor-controls .ob-code-editor-run {
  border-color: var(--ob-color-accent);
  background: var(--ob-color-accent);
  color: var(--ob-color-accent-text, #fff);
}

.ob-code-editor-controls button[aria-disabled="true"] {
  cursor: wait;
  opacity: 0.65;
}

.ob-code-editor-note,
.ob-code-editor-status {
  margin: 0.55rem 0 0;
  color: var(--ob-color-muted);
  font-size: 0.8rem;
}

.ob-code-editor-status {
  margin-top: 0.25rem;
  font-family: var(--ob-font-mono);
  font-size: 0.75rem;
  font-weight: 400;
}

.ob-code-editor-controls + .ob-code-editor-note {
  margin-top: 0.75rem;
  padding-top: 0.65rem;
  border-top: var(--ob-border-width) solid var(--ob-color-border);
}

.ob-rust-output-panel {
  margin-top: 0.65rem;
  overflow: hidden;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-code-bg);
}

.ob-rust-output-label {
  padding: 0.35rem 0.75rem;
  border-bottom: var(--ob-border-width) solid var(--ob-color-border);
  color: var(--ob-color-muted);
  font-family: var(--ob-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* "Check my code": the author's own feedback for a `rust runnable check` fence. */
.ob-rust-check-panel {
  margin-top: 0.65rem;
  padding: 0.65rem 0.85rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-left-width: 4px;
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-code-bg);
}
.ob-rust-check-panel[data-state="passed"] { border-left-color: var(--ob-color-accent); }
.ob-rust-check-summary { margin: 0; font-weight: 700; }
.ob-rust-check-list { margin: 0.5rem 0 0; padding-left: 1.25rem; }
.ob-rust-check-item { margin: 0.25rem 0; }
.ob-rust-check-panel[hidden] { display: none; }

.ob-prose .ob-rust-output {
  max-height: 22rem;
  margin: 0;
  border: 0;
  border-radius: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

@media (prefers-reduced-motion: reduce) {
  .ob-code-cursor { animation: none; }
}

ob-web-sandbox { display: block; margin: 1.5em 0; }
.ob-code-block ob-web-sandbox { margin: 0; }
/* The HTML, CSS, and JavaScript editors use the shared editable-code styles above;
   only the source tabs and the preview frame are sandbox-specific. */
.ob-web-sandbox-tabs { display: flex; flex-wrap: wrap; gap: 0.25rem; margin-bottom: 0.65rem; border-bottom: var(--ob-border-width) solid var(--ob-color-border); }
.ob-web-sandbox-tab { min-height: 2rem; margin-bottom: calc(var(--ob-border-width) * -1); padding: 0.3rem 0.8rem; border-color: transparent; border-bottom: 2px solid transparent; border-radius: var(--ob-radius-sm) var(--ob-radius-sm) 0 0; background: transparent; color: var(--ob-color-muted); }
.ob-web-sandbox-tab:hover { color: var(--ob-color-text); }
.ob-web-sandbox-tab[aria-pressed="true"] { border-bottom-color: var(--ob-color-accent); color: var(--ob-color-accent); font-weight: 600; }
.ob-web-sandbox-preview { display: block; box-sizing: border-box; width: 100%; min-height: 18rem; margin-top: 0.65rem; border: var(--ob-border-width) solid var(--ob-color-border); border-radius: var(--ob-radius-sm); background: #fff; }
/* Console output forwarded from the preview, shown only once something is logged. */
.ob-web-sandbox-console { margin-top: 0.5rem; border: var(--ob-border-width) solid var(--ob-color-border); border-radius: var(--ob-radius-sm); background: var(--ob-color-code-bg); color: var(--ob-color-code-text); }
.ob-web-sandbox-console-title { margin: 0; padding: 0.35rem 0.75rem; border-bottom: var(--ob-border-width) solid var(--ob-color-border); font: 700 0.7rem / 1.6 var(--ob-font-mono); letter-spacing: 0.06em; text-transform: uppercase; }
.ob-web-sandbox-console-log { max-height: 16rem; margin: 0; padding: 0.4rem 0; overflow: auto; list-style: none; font: 0.8rem / 1.6 var(--ob-font-mono); }
.ob-web-sandbox-console-entry { padding: 0.1rem 0.75rem; white-space: pre-wrap; overflow-wrap: anywhere; }
.ob-web-sandbox-console-warn { color: var(--ob-color-callout-warning, #b08800); }
.ob-web-sandbox-console-error { color: var(--ob-color-callout-caution, #cf222e); }


/* ---------- Callouts: > [!NOTE], [!TIP], [!IMPORTANT], [!WARNING], [!CAUTION] ---------- */

.ob-callout {
  --ob-callout: var(--ob-color-callout-note, #2f81f7);
  margin: 1.4em 0;
  padding: 0.75rem 1.1rem;
  border-left: 4px solid var(--ob-callout);
  border-radius: var(--ob-radius-sm);
  background: color-mix(in srgb, var(--ob-callout) 9%, transparent);
}

.ob-callout > :last-child {
  margin-bottom: 0;
}

.ob-callout .ob-callout-title {
  margin: 0 0 0.35em;
  color: var(--ob-callout);
  font-weight: 700;
}

.ob-callout-tip { --ob-callout: var(--ob-color-callout-tip, #2da44e); }
.ob-callout-important { --ob-callout: var(--ob-color-callout-important, #8250df); }
.ob-callout-warning { --ob-callout: var(--ob-color-callout-warning, #bf8700); }
.ob-callout-caution { --ob-callout: var(--ob-color-callout-caution, #cf222e); }

/* ---------- Knowledge checks: ```quiz ---------- */

.ob-knowledge-check {
  display: block;
  margin: 1.5rem 0;
}

.ob-knowledge-check > ob-quiz {
  display: block;
}

.ob-knowledge-check > ob-quiz + ob-quiz {
  margin-top: 0.85rem;
}

ob-quiz fieldset {
  margin: 0;
  padding: 1rem 1.1rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius);
  background: var(--ob-color-surface-raised);
}

ob-quiz legend {
  padding: 0 0.35rem;
  font-weight: 700;
}

.ob-quiz-choices {
  display: grid;
  gap: 0.55rem;
}

.ob-quiz-choice {
  display: flex;
  gap: 0.65rem;
  align-items: start;
  padding: 0.65rem 0.75rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  cursor: pointer;
}

.ob-quiz-choice:has(input:focus-visible) {
  outline: 2px solid var(--ob-color-accent);
  outline-offset: 2px;
}

.ob-quiz-choice.ob-quiz-selected {
  border-color: var(--ob-color-accent-border);
}

.ob-quiz-choice.ob-quiz-correct {
  border-color: var(--ob-color-callout-tip, #2da44e);
  background: color-mix(in srgb, var(--ob-color-callout-tip, #2da44e) 9%, transparent);
}

.ob-quiz-feedback {
  margin: 0.85rem 0 0;
}

.ob-quiz-result {
  margin-right: 0.35em;
}

.ob-quiz-retry {
  margin-top: 0.75rem;
  padding: 0.45rem 0.8rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-surface);
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.ob-quiz-error {
  padding: 0.75rem 1rem;
  border-left: 4px solid var(--ob-color-callout-caution, #cf222e);
  color: var(--ob-color-callout-caution, #cf222e);
}

/* ---------- Recipes (posts with `recipe: true`; controls added by <ob-recipe>) ---------- */

.ob-recipe-card {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-surface-raised);
}

.ob-recipe-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  margin: 0;
}

.ob-recipe-facts dt {
  color: var(--ob-color-subtle);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ob-recipe-facts dd {
  margin: 0.1rem 0 0;
  font-weight: 600;
}

.ob-recipe-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.6rem;
  margin-top: 0.9rem;
}

.ob-recipe-actions:empty {
  display: none;
}

.ob-recipe-button,
.ob-recipe-jump {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  padding: 0.25rem 0.8rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-surface);
  color: var(--ob-color-text);
  font: inherit;
  font-size: 0.875rem;
  text-decoration: none;
  cursor: pointer;
}

.ob-recipe-button:hover,
.ob-recipe-jump:hover {
  border-color: var(--ob-color-accent-border);
}

.ob-recipe-button[aria-pressed="true"] {
  border-color: var(--ob-color-accent);
  background: var(--ob-color-accent);
  color: var(--ob-color-accent-contrast);
}

.ob-recipe-button:disabled,
.ob-recipe-button[aria-disabled="true"] {
  cursor: default;
  opacity: 0.45;
}

.ob-recipe-actions [hidden] {
  display: none !important;
}

.ob-recipe-jump {
  border-color: var(--ob-color-accent-border);
  color: var(--ob-color-link);
}

.ob-recipe-scale {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.875rem;
}

.ob-recipe-scale .ob-recipe-button {
  justify-content: center;
  min-width: 2.25rem;
  padding: 0;
  font-size: 1.1rem;
}

.ob-recipe-count {
  min-width: 1.5ch;
  font-weight: 700;
  text-align: center;
}

.ob-qty-scaled {
  border-radius: 3px;
  background: color-mix(in srgb, var(--ob-color-accent) 18%, transparent);
}

.ob-done .ob-qty-scaled {
  background: none;
}

.ob-recipe-list > li + li {
  margin-top: 0.45em;
}

.ob-steps > li + li {
  margin-top: 0.8em;
}

.ob-has-checks .ob-ingredients {
  padding-left: 0.2rem;
  list-style: none;
}

.ob-has-checks .ob-recipe-list > li {
  cursor: pointer;
}

.ob-check {
  width: 1.05em;
  height: 1.05em;
  margin: 0 0.6em 0 0;
  vertical-align: -0.15em;
  accent-color: var(--ob-color-accent);
  cursor: pointer;
}

.ob-recipe-list > li.ob-done {
  color: var(--ob-color-subtle);
  text-decoration: line-through;
  text-decoration-color: color-mix(in srgb, currentColor 60%, transparent);
}

.ob-timer {
  padding: 0 0.45em;
  border: 1px dashed var(--ob-color-accent-border);
  border-radius: 999px;
  background: transparent;
  color: var(--ob-color-link);
  font: inherit;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}

.ob-timer::before {
  content: "⏱ ";
}

.ob-timer[data-state="running"] {
  border-style: solid;
  background: color-mix(in srgb, var(--ob-color-accent) 16%, transparent);
}

.ob-timer[data-state="done"] {
  border-style: solid;
  background: var(--ob-color-accent);
  color: var(--ob-color-accent-contrast);
}

/* While running, the countdown replaces the label; once done, both show. */
.ob-timer-clock:empty,
.ob-timer[data-state="running"] .ob-timer-label {
  display: none;
}

.ob-timer[data-state="done"] .ob-timer-clock::before {
  content: " · ";
}

/* Cook mode: larger, easier to read from a step back. */
ob-recipe.ob-cooking .ob-recipe-part {
  font-size: 1.15em;
}

.ob-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---------- Embeds (standalone supported links become players) ---------- */

.ob-embed {
  margin: 2em 0;
}

.ob-embed iframe {
  display: block;
  width: 100%;
  height: var(--ob-embed-height, 30rem);
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-surface-raised);
}

.ob-embed-youtube iframe {
  height: auto;
  aspect-ratio: 16 / 9;
}

.ob-embed figcaption {
  margin-top: 0.4rem;
  color: var(--ob-color-muted);
  font-size: 0.85rem;
}

/* ---------- Code copy button (added by <ob-code>) ---------- */

.ob-copy {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  padding: 0.2rem 0.6rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-surface);
  color: var(--ob-color-muted);
  font: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  opacity: 0;
}

.ob-prose pre:hover .ob-copy,
.ob-copy:focus-visible {
  opacity: 1;
}

@media (hover: none) {
  .ob-copy {
    opacity: 1;
  }
}

/* ---------- Share, related ---------- */

.ob-share {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 2.5rem 0 1rem;
}

.ob-share-label {
  margin-right: 0.25rem;
  color: var(--ob-color-muted);
  font-size: 0.875rem;
}

.ob-share ul,
.ob-share li {
  display: contents;
}

.ob-share a,
.ob-share button {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: 999px;
  background: transparent;
  color: var(--ob-color-text);
  font: inherit;
  font-size: 0.85rem;
  text-decoration: none;
  cursor: pointer;
}

.ob-share a:hover,
.ob-share button:hover {
  border-color: var(--ob-color-accent-border);
  color: var(--ob-color-accent-soft);
}

.ob-related {
  margin-top: 2.5rem;
}

.ob-related-title {
  margin: 0 0 1rem;
  font-family: var(--ob-font-heading);
  font-size: 1.2rem;
}

.ob-post-extra {
  margin-top: 2.5rem;
}

ob-views:empty {
  display: none;
}

ob-comments {
  display: block;
  margin-block: var(--ob-space-8, 2rem);
  border-top: 1px solid var(--ob-color-border);
  padding-top: var(--ob-space-6, 1.5rem);
}

.ob-comments-list { padding-inline-start: 1.25rem; }
.ob-comments-list li { margin-block: 1rem; }
.ob-comments-list p { margin-block: .25rem; white-space: pre-wrap; }
.ob-comments-form { display: grid; gap: .75rem; max-width: 42rem; }
.ob-comments-form label { display: grid; gap: .25rem; font-weight: 600; }
.ob-comments-form input,
.ob-comments-form textarea { font: inherit; padding: .65rem; border: 1px solid var(--ob-color-border); border-radius: .35rem; background: var(--ob-color-surface); color: inherit; }
.ob-comments-form button { justify-self: start; }

/* ---------- Series ---------- */

.ob-series-box {
  margin: 3rem 0 2rem;
  padding: 1.25rem 1.4rem;
  border: var(--ob-border-width) solid var(--ob-color-accent-border);
  border-radius: var(--ob-radius);
  background: var(--ob-color-surface);
}

.ob-series-nav,
.ob-pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.ob-series-nav {
  margin-top: 1rem;
}

.ob-series-nav a {
  display: flex;
  flex-direction: column;
  max-width: 48%;
  text-decoration: none;
}

.ob-series-next {
  margin-left: auto;
  text-align: right;
}

.ob-series-nav a {
  min-height: 2.75rem;
  justify-content: center;
}

.ob-series-edge .ob-meta {
  font-style: italic;
}

/* Decorative progress cells (aria-hidden): hollow = not marked, ringed = this part, filled = marked complete. */
.ob-series-path {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
}

.ob-series-path li {
  flex: 1 1 0;
  min-width: 0.75rem;
  max-width: 2.5rem;
  height: 0.65rem;
  border: 2px solid var(--ob-color-accent-border);
  border-radius: 2px;
}

.ob-series-path li[data-done] {
  background: var(--ob-color-accent-soft);
  border-color: var(--ob-color-accent-soft);
}

.ob-series-path li[data-current] {
  height: 0.95rem;
  border-style: double;
  border-width: 4px;
  border-color: var(--ob-color-text);
}

@media (max-width: 40rem) {
  .ob-series-nav {
    flex-direction: column;
  }

  .ob-series-nav a,
  .ob-series-next {
    max-width: 100%;
    margin-left: 0;
    text-align: left;
  }
}

.ob-series-parts-details {
  margin-top: 1rem;
}

.ob-series-parts-details summary {
  cursor: pointer;
}

.ob-series-parts {
  margin: 0.75rem 0 0;
  padding-left: 1.5rem;
}

.ob-series-parts a[aria-current="page"] {
  color: var(--ob-color-accent-soft);
  font-weight: 600;
}

.ob-series-parts-full {
  padding: 0;
  list-style: none;
}

.ob-part {
  display: flex;
  gap: 1rem;
  padding: 1rem 0.5rem;
  border-top: var(--ob-border-width) solid var(--ob-color-border);
  color: inherit;
  text-decoration: none;
}

.ob-part:hover {
  background: var(--ob-color-surface-raised);
}

.ob-part-number {
  flex: none;
  color: var(--ob-color-accent-soft);
  font-family: var(--ob-font-heading);
  font-size: 1.5rem;
  line-height: 1.2;
}

.ob-part-body {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.ob-part-title {
  font-family: var(--ob-font-heading);
  font-weight: var(--ob-heading-weight);
  font-size: 1.15rem;
}

.ob-part-summary {
  color: var(--ob-color-muted);
  font-size: 0.95rem;
}

/* ---------- Pager, archive ---------- */

.ob-pager {
  align-items: center;
  margin-top: 2rem;
}

.ob-pager a {
  text-decoration: none;
}

.ob-pager-status {
  color: var(--ob-color-muted);
  font-size: 0.875rem;
}

.ob-post-pager {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: var(--ob-border-width) solid var(--ob-color-border);
}

.ob-post-pager a {
  max-width: 48%;
}

.ob-archive-year {
  margin: 2rem 0 0.5rem;
  font-family: var(--ob-font-heading);
}

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

.ob-archive li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.4rem 0;
  border-bottom: var(--ob-border-width) solid var(--ob-color-border);
}

/* ---------- Search ---------- */

.ob-search-form {
  display: grid;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.ob-search-form input {
  width: 100%;
  padding: 0.8rem 1rem;
  border: var(--ob-border-width) solid var(--ob-color-border);
  border-radius: var(--ob-radius-sm);
  background: var(--ob-color-surface);
  color: var(--ob-color-text);
  font: inherit;
}

.ob-search-results {
  margin: 0;
  padding: 0;
  list-style: none;
}

.ob-search-results li {
  padding: 1rem 0;
  border-top: var(--ob-border-width) solid var(--ob-color-border);
}

.ob-search-results a {
  font-family: var(--ob-font-heading);
  font-size: 1.15rem;
}

.ob-search-results p {
  margin: 0.25rem 0 0;
  color: var(--ob-color-muted);
  font-size: 0.95rem;
}

.ob-search-results mark {
  background: var(--ob-color-glow);
  color: inherit;
}

/* ---------- Footer, back to top ---------- */

.ob-footer {
  margin-top: auto;
  border-top: var(--ob-border-width) solid var(--ob-color-border);
  color: var(--ob-color-muted);
  font-size: 0.875rem;
}

.ob-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  width: min(var(--ob-max-width), 100% - 2 * var(--ob-gutter));
  margin: 0 auto;
  padding-block: 1.75rem;
}

.ob-footer p {
  margin: 0;
}

.ob-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ob-footer a {
  color: var(--ob-color-muted);
}

.ob-footer a:hover {
  color: var(--ob-color-accent-soft);
}

.ob-powered {
  flex-basis: 100%;
  color: var(--ob-color-subtle);
  font-size: 0.8rem;
}

ob-back-to-top {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 20;
}

ob-back-to-top button {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: var(--ob-border-width) solid var(--ob-color-accent-border);
  border-radius: 50%;
  background: var(--ob-color-surface);
  box-shadow: var(--ob-shadow);
  color: var(--ob-color-accent-soft);
  font-size: 1.25rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
  transition:
    opacity var(--ob-motion) ease,
    transform var(--ob-motion) ease;
}

ob-back-to-top[visible] button {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

ob-back-to-top button:hover {
  background: var(--ob-color-accent);
  color: var(--ob-color-accent-contrast);
}

/* ---------- Motion and print ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media print {
  .ob-header,
  .ob-footer,
  .ob-series-box,
  .ob-post-pager,
  .ob-copy,
  ob-back-to-top,
  ob-theme-toggle {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .ob-recipe-actions,
  .ob-check,
  .ob-timer::before,
  .ob-timer-clock {
    display: none !important;
  }

  .ob-timer .ob-timer-label {
    display: inline !important;
  }

  .ob-recipe-card {
    background: none;
    color: inherit;
  }

  .ob-recipe-facts dt {
    color: #555;
  }

  .ob-qty-scaled {
    background: none;
  }

  .ob-timer,
  .ob-timer[data-state] {
    padding: 0;
    border: 0;
    background: none;
    color: inherit;
  }

  /* "Print recipe": the title, the summary, the ingredients and the steps. */
  .ob-print-recipe .ob-post-header > :not(.ob-heading, h1),
  .ob-print-recipe .ob-cover,
  .ob-print-recipe .ob-toc,
  .ob-print-recipe .ob-prose > :not(.ob-recipe-part),
  .ob-print-recipe .ob-post > :not(.ob-post-header, ob-recipe),
  .ob-print-recipe .ob-heading-anchor,
  .ob-print-recipe .ob-code-label {
    display: none !important;
  }

  .ob-print-recipe .ob-recipe-list > li.ob-done {
    color: inherit;
    text-decoration: none;
  }
}

/* <ob-git-sandbox>: in-memory Git lesson widget. Themed through --ob-* tokens. */
ob-git-sandbox {
  display: block;
  margin-block: var(--ob-space-5, 1.5rem);
  padding: var(--ob-space-4, 1rem);
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius, 0.5rem);
  background: var(--ob-color-surface, transparent);
}

ob-git-sandbox .ob-git-note { margin: 0 0 1rem; color: var(--ob-color-muted, inherit); font-size: 0.85em; }
ob-git-sandbox .ob-git-graph { overflow-x: auto; }
ob-git-sandbox .ob-git-svg { display: block; width: 100%; height: auto; max-height: 22rem; }
ob-git-sandbox .ob-git-edge { fill: none; stroke: var(--ob-color-border, currentColor); stroke-width: 2.5; }
ob-git-sandbox .ob-git-node circle { fill: var(--ob-color-surface-raised, var(--ob-color-surface, Canvas)); stroke: var(--ob-color-accent-soft, currentColor); stroke-width: 2.5; }
ob-git-sandbox .ob-git-node.is-merge circle { stroke-dasharray: 4 3; }
ob-git-sandbox .ob-git-node.is-head circle { fill: var(--ob-color-accent, currentColor); }
ob-git-sandbox .ob-git-id,
ob-git-sandbox .ob-git-branch { fill: var(--ob-color-text, currentColor); font: 0.7rem var(--ob-font-mono, monospace); text-anchor: middle; }
ob-git-sandbox .ob-git-branch { fill: var(--ob-color-accent-soft, currentColor); font-weight: 700; }
ob-git-sandbox .ob-git-branch.is-current { text-decoration: underline; }
ob-git-sandbox .ob-git-refs { display: grid; gap: 0.5rem; margin: 1rem 0; padding: 0; list-style: none; }
ob-git-sandbox .ob-git-refs li { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; }
ob-git-sandbox .ob-git-ref { font-family: var(--ob-font-mono, monospace); font-size: 0.85em; margin-right: auto; }
ob-git-sandbox .ob-git-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
ob-git-sandbox .ob-git-resolve-actions { display: contents; }
ob-git-sandbox button {
  min-height: 2.75rem;
  padding: 0.4rem 0.9rem;
  border: var(--ob-border-width, 1px) solid var(--ob-color-accent-border, currentColor);
  border-radius: var(--ob-radius-sm, 4px);
  background: transparent;
  color: var(--ob-color-text, inherit);
  font: inherit;
  cursor: pointer;
}
ob-git-sandbox button:hover:not(:disabled) { background: var(--ob-color-accent, currentColor); color: var(--ob-color-accent-contrast, Canvas); }
ob-git-sandbox button:disabled { opacity: 0.5; cursor: not-allowed; }
ob-git-sandbox button:focus-visible,
ob-git-sandbox .ob-git-input:focus-visible,
ob-git-sandbox .ob-git-log:focus-visible { outline: var(--ob-focus-ring, 3px solid currentColor); outline-offset: 2px; }
ob-git-sandbox .ob-git-form { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
ob-git-sandbox .ob-git-form label { flex-basis: 100%; font-size: 0.8em; color: var(--ob-color-muted, inherit); }
ob-git-sandbox .ob-git-input {
  flex: 1 1 14rem;
  min-height: 2.75rem;
  padding: 0.4rem 0.7rem;
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius-sm, 4px);
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 1rem var(--ob-font-mono, monospace);
}
ob-git-sandbox .ob-git-log {
  min-height: 5.5rem;
  margin: 1rem 0 0;
  padding: 0.75rem;
  overflow-x: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  border-radius: var(--ob-radius-sm, 4px);
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 0.85rem/1.5 var(--ob-font-mono, monospace);
}
ob-git-sandbox .ob-git-log[data-error="true"] { border-left: 4px solid var(--ob-color-accent, currentColor); }

/* <ob-fetch-lab>: simulated network inspector and Web Storage panel. */
ob-fetch-lab { display: block; margin-block: var(--ob-space-5, 1.5rem); }
ob-fetch-lab .ob-fetch-note { margin: 0 0 1rem; color: var(--ob-color-muted, inherit); font-size: 0.85em; }
ob-fetch-lab .ob-fetch-panel {
  min-width: 0;
  margin-bottom: 1rem;
  padding: var(--ob-space-4, 1rem);
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius, 0.5rem);
  background: var(--ob-color-surface, transparent);
}
ob-fetch-lab .ob-fetch-panel h3 { margin: 0 0 0.75rem; font-size: 1rem; }
ob-fetch-lab .ob-fetch-presets,
ob-fetch-lab .ob-fetch-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
ob-fetch-lab .ob-fetch-form { display: grid; gap: 0.75rem; grid-template-columns: minmax(6rem, 8rem) 1fr; }
ob-fetch-lab .ob-fetch-form > :nth-child(n + 3) { grid-column: 1 / -1; }
ob-fetch-lab .ob-fetch-form > button { justify-self: start; }
ob-fetch-lab .ob-lab-field { display: grid; gap: 0.25rem; min-width: 0; }
ob-fetch-lab .ob-lab-field label,
ob-fetch-lab .ob-fetch-check { font-size: 0.8em; color: var(--ob-color-muted, inherit); }
ob-fetch-lab input[type="text"],
ob-fetch-lab select,
ob-fetch-lab textarea {
  min-height: 2.75rem;
  width: 100%;
  padding: 0.4rem 0.7rem;
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius-sm, 4px);
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 1rem var(--ob-font-mono, monospace);
}
ob-fetch-lab button {
  min-height: 2.75rem;
  padding: 0.4rem 0.9rem;
  border: var(--ob-border-width, 1px) solid var(--ob-color-accent-border, currentColor);
  border-radius: var(--ob-radius-sm, 4px);
  background: transparent;
  color: var(--ob-color-text, inherit);
  font: inherit;
  cursor: pointer;
}
ob-fetch-lab button:hover:not(:disabled) { background: var(--ob-color-accent, currentColor); color: var(--ob-color-accent-contrast, Canvas); }
ob-fetch-lab button:disabled { opacity: 0.5; cursor: not-allowed; }
ob-fetch-lab :is(button, input, select, textarea, pre):focus-visible { outline: var(--ob-focus-ring, 3px solid currentColor); outline-offset: 2px; }
ob-fetch-lab .ob-fetch-stages { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0 0 1rem; padding: 0; list-style: none; counter-reset: stage; }
ob-fetch-lab .ob-fetch-stages li {
  flex: 1 1 6rem;
  padding: 0.5rem 0.75rem;
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius-sm, 4px);
  font-family: var(--ob-font-mono, monospace);
  font-size: 0.85em;
  text-align: center;
}
ob-fetch-lab .ob-fetch-stages li[data-state="active"]::before { content: "… "; }
ob-fetch-lab .ob-fetch-stages li[data-state="done"] { border-color: var(--ob-color-accent-soft, currentColor); }
ob-fetch-lab .ob-fetch-stages li[data-state="done"]::before { content: "✓ "; }
ob-fetch-lab .ob-fetch-stages li[data-state="error"] { border-style: dashed; border-width: 2px; }
ob-fetch-lab .ob-fetch-stages li[data-state="error"]::before { content: "✕ "; }
ob-fetch-lab .ob-fetch-result { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); }
ob-fetch-lab :is(.ob-fetch-out, .ob-fetch-code) {
  margin: 0;
  padding: 0.75rem;
  overflow-x: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  border-radius: var(--ob-radius-sm, 4px);
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 0.85rem/1.5 var(--ob-font-mono, monospace);
}
ob-fetch-lab .ob-fetch-code { margin-top: 1rem; }
ob-fetch-lab .ob-fetch-out[data-error="true"] { border-left: 4px solid var(--ob-color-accent, currentColor); }
ob-fetch-lab .ob-fetch-lesson { margin: 0.75rem 0 0; font-size: 0.9em; }
ob-fetch-lab .ob-fetch-usage { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; margin: 0 0 0.75rem; font-family: var(--ob-font-mono, monospace); font-size: 0.85em; }
ob-fetch-lab meter { width: 10rem; max-width: 100%; }
ob-fetch-lab .ob-fetch-items { margin: 0 0 1rem; padding: 0; list-style: none; font: 0.8rem var(--ob-font-mono, monospace); overflow-wrap: anywhere; }
ob-fetch-lab .ob-fetch-items li { padding-block: 0.15rem; }
ob-fetch-lab .ob-fetch-explain { margin: 0 0 1rem; font-size: 0.9em; }
ob-fetch-lab .ob-fetch-world { margin-bottom: 1rem; font: 0.85rem var(--ob-font-mono, monospace); white-space: pre-wrap; overflow-wrap: anywhere; }
ob-fetch-lab .ob-fetch-empty { color: var(--ob-color-muted, inherit); }
ob-fetch-lab .ob-fetch-check { display: block; margin-block: 0.75rem; }

/* <ob-component-lab>: live Shadow DOM architecture explorer. */
ob-component-lab { display: block; margin-block: var(--ob-space-5, 1.5rem); }
ob-component-lab .ob-cl-note { margin: 0 0 1rem; color: var(--ob-color-muted, inherit); font-size: 0.85em; }
ob-component-lab .ob-cl-panel {
  min-width: 0;
  margin-bottom: 1rem;
  padding: var(--ob-space-4, 1rem);
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius, 0.5rem);
  background: var(--ob-color-surface, transparent);
}
ob-component-lab .ob-cl-panel h3 { margin: 0 0 0.75rem; font-size: 1rem; }
ob-component-lab .ob-cl-stage { padding: 1rem; border: 1px dashed var(--ob-color-border, currentColor); border-radius: var(--ob-radius-sm, 4px); }
ob-component-lab .ob-cl-controls { display: grid; gap: 0.75rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
ob-component-lab .ob-cl-field { display: grid; gap: 0.25rem; min-width: 0; }
ob-component-lab .ob-cl-field label,
ob-component-lab .ob-cl-check label { font-size: 0.85em; }
ob-component-lab .ob-cl-field output { font: 0.8rem var(--ob-font-mono, monospace); color: var(--ob-color-muted, inherit); }
ob-component-lab .ob-cl-check { display: flex; align-items: center; gap: 0.5rem; min-height: 2.75rem; }
ob-component-lab input[type="checkbox"] { width: 1.25rem; height: 1.25rem; accent-color: var(--ob-color-accent, currentColor); }
ob-component-lab input[type="color"] { width: 100%; min-height: 2.75rem; padding: 0.2rem; background: transparent; border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor); border-radius: var(--ob-radius-sm, 4px); }
ob-component-lab input[type="range"] { width: 100%; min-height: 2.75rem; accent-color: var(--ob-color-accent, currentColor); }
ob-component-lab select {
  min-height: 2.75rem;
  padding: 0.4rem 0.7rem;
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius-sm, 4px);
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 1rem var(--ob-font-mono, monospace);
}
ob-component-lab :is(input, select, pre):focus-visible { outline: var(--ob-focus-ring, 3px solid currentColor); outline-offset: 2px; }
ob-component-lab .ob-cl-code {
  margin: 0 0 0.75rem;
  padding: 0.75rem;
  overflow-x: auto;
  border-radius: var(--ob-radius-sm, 4px);
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 0.8rem/1.5 var(--ob-font-mono, monospace);
}
ob-component-lab :is(.ob-cl-slots, .ob-cl-notes) { margin: 0; padding-left: 1.25rem; font-size: 0.9em; }
ob-component-lab .ob-cl-slots { font-family: var(--ob-font-mono, monospace); font-size: 0.85em; }
ob-component-lab .ob-cl-notes li { margin-bottom: 0.4rem; }

/* <ob-evolution-lab>, <ob-audio-lab>, <ob-native-lab>: embeddable versions of the series labs. */
:is(ob-evolution-lab, ob-audio-lab, ob-native-lab) {
  display: block;
  margin-block: var(--ob-space-5, 1.5rem);
  padding: var(--ob-space-4, 1rem);
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius, 0.5rem);
  background: var(--ob-color-surface, transparent);
}

:is(ob-evolution-lab, ob-audio-lab, ob-native-lab) :is(.ob-evo-note, .ob-audio-note, .ob-native-note) {
  margin: 0 0 1rem;
  color: var(--ob-color-muted, inherit);
  font-size: 0.85em;
}

:is(ob-evolution-lab, ob-audio-lab, ob-native-lab) button {
  min-height: 2.75rem;
  padding: 0.4rem 0.9rem;
  border: var(--ob-border-width, 1px) solid var(--ob-color-accent-border, currentColor);
  border-radius: var(--ob-radius-sm, 4px);
  background: transparent;
  color: var(--ob-color-text, inherit);
  font: inherit;
  cursor: pointer;
}

:is(ob-evolution-lab, ob-audio-lab, ob-native-lab) button:hover:not(:disabled),
ob-evolution-lab .ob-evo-eras button[aria-pressed="true"] {
  background: var(--ob-color-accent, currentColor);
  color: var(--ob-color-accent-contrast, Canvas);
}

:is(ob-evolution-lab, ob-audio-lab, ob-native-lab) button:disabled { opacity: 0.5; cursor: not-allowed; }

:is(ob-evolution-lab, ob-audio-lab, ob-native-lab) :is(button, input, select, pre, summary, [tabindex]):focus-visible {
  outline: var(--ob-focus-ring, 3px solid currentColor);
  outline-offset: 2px;
}

:is(ob-evolution-lab, ob-audio-lab, ob-native-lab) :is(pre, code) {
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
}

/* JavaScript evolution */
ob-evolution-lab .ob-evo-eras { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
ob-evolution-lab .ob-evo-compare { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); margin-block: 1rem; }
ob-evolution-lab .ob-evo-column { min-width: 0; }
ob-evolution-lab .ob-evo-column :is(h3, h4) { margin: 0 0 0.5rem; font: 700 0.8rem/1.3 var(--ob-font-mono, monospace); letter-spacing: 0.04em; text-transform: uppercase; }
ob-evolution-lab .ob-evo-code {
  margin: 0 0 0.75rem;
  padding: 0.75rem;
  overflow-x: auto;
  border-radius: var(--ob-radius-sm, 4px);
  font: 0.8rem/1.5 var(--ob-font-mono, monospace);
}
ob-evolution-lab .ob-evo-input { margin-bottom: 1rem; }
ob-evolution-lab .ob-evo-caveat { color: var(--ob-color-muted, inherit); font-size: 0.9em; }

/* Web Audio */
ob-audio-lab .ob-audio-state { display: inline-block; margin-bottom: 0.75rem; font: 700 0.8rem var(--ob-font-mono, monospace); letter-spacing: 0.05em; }
ob-audio-lab .ob-audio-controls { display: grid; gap: 0.75rem; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); align-items: end; }
ob-audio-lab .ob-audio-field { display: grid; gap: 0.25rem; min-width: 0; }
ob-audio-lab .ob-audio-field label { font-size: 0.85em; }
ob-audio-lab .ob-audio-field output { font: 0.8rem var(--ob-font-mono, monospace); color: var(--ob-color-muted, inherit); }
ob-audio-lab select {
  min-height: 2.75rem;
  padding: 0.4rem 0.7rem;
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius-sm, 4px);
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 1rem var(--ob-font-mono, monospace);
}
ob-audio-lab input[type="range"] { width: 100%; min-height: 2.75rem; accent-color: var(--ob-color-accent, currentColor); }
ob-audio-lab .ob-audio-transport { display: flex; flex-wrap: wrap; gap: 0.5rem; }
ob-audio-lab .ob-audio-status { margin: 0.75rem 0; min-height: 1.5em; }
ob-audio-lab .ob-audio-scope { display: block; width: 100%; max-height: 10rem; border-radius: var(--ob-radius-sm, 4px); background: var(--ob-color-code-bg, transparent); }
ob-audio-lab .ob-audio-axis { fill: none; stroke: var(--ob-color-border, currentColor); stroke-width: 1; }
ob-audio-lab .ob-audio-trace { fill: none; stroke: var(--ob-color-accent-soft, currentColor); stroke-width: 2; }
ob-audio-lab .ob-audio-routing { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.75rem 0 0; padding: 0; list-style: none; font: 0.8rem var(--ob-font-mono, monospace); }
ob-audio-lab .ob-audio-routing li { padding: 0.2rem 0.6rem; border: 1px dashed var(--ob-color-border, currentColor); border-radius: var(--ob-radius-sm, 4px); }
ob-audio-lab .ob-audio-routing li + li::before { content: "→ "; }

/* Native browser APIs */
ob-native-lab .ob-native-section { margin-bottom: 1.25rem; padding-bottom: 1rem; border-bottom: 1px solid var(--ob-color-border, currentColor); }
ob-native-lab .ob-native-section:last-child { margin-bottom: 0; border-bottom: 0; }
ob-native-lab .ob-native-section h3 { margin: 0 0 0.5rem; font-size: 1rem; }
ob-native-lab .ob-native-section h3 small { margin-left: 0.5rem; font: 0.75rem var(--ob-font-mono, monospace); color: var(--ob-color-muted, inherit); }
ob-native-lab .ob-native-layout { margin: 0.75rem 0; }
ob-native-lab .ob-native-card { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem; border: 2px solid var(--ob-color-accent-border, currentColor); border-radius: var(--ob-radius, 0.5rem); }
ob-native-lab .ob-native-card span:not(.ob-native-icon) { display: block; font-size: 0.85em; color: var(--ob-color-muted, inherit); }
ob-native-lab .ob-native-icon { flex: none; width: 2rem; height: 2rem; border-radius: 50%; background: var(--ob-color-accent, currentColor); }
ob-native-lab .ob-native-layout[data-layout="expanded"] .ob-native-card { flex-direction: column; align-items: flex-start; padding: 1.75rem; }
ob-native-lab .ob-native-controls { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.5rem; }
ob-native-lab .ob-native-status,
ob-native-lab .ob-native-readout { margin: 0.5rem 0; font-size: 0.9em; min-height: 1.4em; }
ob-native-lab .ob-native-api { font-size: 0.8em; }
ob-native-lab .ob-native-popover { padding: 1rem; max-width: 20rem; border: 2px solid var(--ob-color-accent-border, currentColor); border-radius: var(--ob-radius, 0.5rem); background: var(--ob-color-surface, Canvas); color: var(--ob-color-text, CanvasText); }
ob-native-lab .ob-native-root { height: 9rem; overflow: auto; border: 1px dashed var(--ob-color-border, currentColor); border-radius: var(--ob-radius-sm, 4px); }
ob-native-lab .ob-native-spacer { height: 7rem; }
ob-native-lab .ob-native-target { padding: 0.75rem; border: 2px solid var(--ob-color-border, currentColor); border-radius: var(--ob-radius-sm, 4px); text-align: center; }
ob-native-lab .ob-native-target.ob-native-in-view { border-color: var(--ob-color-accent-soft, currentColor); border-style: double; border-width: 4px; }
ob-native-lab .ob-native-field { display: grid; gap: 0.25rem; margin-top: 0.75rem; }
ob-native-lab .ob-native-field label { font-size: 0.85em; }
ob-native-lab input[type="range"] { width: 100%; min-height: 2.75rem; accent-color: var(--ob-color-accent, currentColor); }

/* <ob-practice-lab>: guided Git practice terminal. Themed through --ob-* tokens. */
ob-practice-lab {
  display: block;
  margin-block: var(--ob-space-5, 1.5rem);
  padding: var(--ob-space-4, 1rem);
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius, 0.5rem);
  background: var(--ob-color-surface, transparent);
}
ob-practice-lab .ob-practice-status { margin: 0 0 0.25rem; color: var(--ob-color-muted, inherit); font-size: 0.8em; letter-spacing: 0.06em; text-transform: uppercase; }
ob-practice-lab .ob-practice-goal { margin: 0 0 0.75rem; font-weight: 700; }
ob-practice-lab .ob-practice-log {
  height: 14rem;
  padding: 0.75rem;
  overflow-y: auto;
  border-radius: var(--ob-radius-sm, 4px);
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 0.85rem/1.5 var(--ob-font-mono, monospace);
}
ob-practice-lab .ob-practice-line { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
ob-practice-lab .ob-practice-line.is-cmd { font-weight: 700; }
ob-practice-lab .ob-practice-line.is-why { margin-bottom: 0.5rem; font-style: italic; opacity: 0.85; }
ob-practice-lab .ob-practice-line.is-err { border-left: 4px solid var(--ob-color-accent, currentColor); padding-left: 0.5rem; }
ob-practice-lab .ob-practice-line.is-tip { color: var(--ob-color-muted, inherit); }
ob-practice-lab .ob-practice-form { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-top: 0.75rem; }
ob-practice-lab .ob-practice-form label { flex-basis: 100%; font-size: 0.8em; color: var(--ob-color-muted, inherit); }
ob-practice-lab .ob-practice-input {
  flex: 1 1 14rem;
  min-height: 2.75rem;
  padding: 0.4rem 0.7rem;
  border: var(--ob-border-width, 1px) solid var(--ob-color-border, currentColor);
  border-radius: var(--ob-radius-sm, 4px);
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 1rem var(--ob-font-mono, monospace);
}
ob-practice-lab button {
  min-height: 2.75rem;
  padding: 0.4rem 0.9rem;
  border: var(--ob-border-width, 1px) solid var(--ob-color-accent-border, currentColor);
  border-radius: var(--ob-radius-sm, 4px);
  background: transparent;
  color: var(--ob-color-text, inherit);
  font: inherit;
  cursor: pointer;
}
ob-practice-lab button:hover:not(:disabled) { background: var(--ob-color-accent, currentColor); color: var(--ob-color-accent-contrast, Canvas); }
ob-practice-lab button:disabled { opacity: 0.5; cursor: not-allowed; }
ob-practice-lab .ob-practice-restart { margin-top: 0.75rem; }
ob-practice-lab button:focus-visible,
ob-practice-lab .ob-practice-input:focus-visible,
ob-practice-lab .ob-practice-log:focus-visible { outline: var(--ob-focus-ring, 3px solid currentColor); outline-offset: 2px; }
ob-practice-lab .ob-practice-pager { padding: 0; }
ob-practice-lab .ob-practice-pager:focus-visible { outline: var(--ob-focus-ring, 3px solid currentColor); outline-offset: 2px; }
ob-practice-lab .ob-practice-pager-view {
  height: 12.5em;
  margin: 0;
  padding: 0.75rem 0.75rem 0;
  overflow: hidden;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  border-radius: var(--ob-radius-sm, 4px) var(--ob-radius-sm, 4px) 0 0;
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 0.85rem/1.5 var(--ob-font-mono, monospace);
}
ob-practice-lab .ob-practice-pager-prompt {
  margin: 0;
  padding: 0 0.75rem 0.5rem;
  border-radius: 0 0 var(--ob-radius-sm, 4px) var(--ob-radius-sm, 4px);
  background: var(--ob-color-code-bg, transparent);
  color: var(--ob-color-code-text, inherit);
  font: 700 0.85rem/1.5 var(--ob-font-mono, monospace);
}
ob-practice-lab .ob-practice-pager-keys,
ob-practice-lab .ob-practice-pager-summary { margin: 0.5rem 0 0; color: var(--ob-color-muted, inherit); font-size: 0.8em; }
ob-practice-lab .ob-practice-pager-controls { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.5rem; }
ob-practice-lab [hidden] { display: none; }