/*!
 * FrameBaseCSS v1.1.0
 * Copyright (c) 2026 IceWolf23X
 * Released under the MIT License.
 * https://github.com/IceWolf23X/FrameBaseCSS
 *
==============================================================================
FRAMEBASECSS
==============================================================================
Version: 1.1.0
Purpose: reusable, themeable, dependency-free design system for websites and
technical documentation. The default theme is dark.

Conventions:
  - Design tokens use the --fb-* prefix.
  - Components and layouts use the fb-* prefix.
  - Utilities use the u-* prefix.
  - Variants use --modifier and state hooks use aria-* or data-state.

The complete file can be linked or embedded in a <style> element.
No fonts, images, scripts, frameworks, or network resources are required.
==============================================================================
*/

/* ==========================================================================
   01. DESIGN TOKENS
   ========================================================================== */

:root {
  --fb-color-scheme: dark;
  color-scheme: var(--fb-color-scheme);

  /* Palette */
  --fb-color-background: #2f3235;
  --fb-color-surface: #3a3e42;
  --fb-color-surface-alt: #464b50;
  --fb-color-surface-raised: #50565c;
  --fb-color-border: #697078;
  --fb-color-text-muted: #b8c0c7;
  --fb-color-text: #f3f6f8;
  --fb-color-primary: #35c6d4;
  --fb-color-primary-hover: #65d5df;
  --fb-color-on-primary: #172023;
  --fb-color-secondary: #0e96a6;
  --fb-color-info: #8feaf2;
  --fb-color-success: #45d16f;
  --fb-color-warning: #f0b84b;
  --fb-color-on-warning: #172023;
  --fb-color-danger: #f05b4f;
  --fb-color-danger-action: #a83f37;
  --fb-color-danger-action-hover: #c24b42;
  --fb-color-on-danger: #ffffff;
  --fb-color-code-background: #282b2e;
  --fb-color-backdrop: rgb(0 0 0 / 0.62);

  /* Typography */
  --fb-font-mono:
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Monaco,
    Consolas,
    "Liberation Mono",
    "Courier New",
    monospace;
  --fb-font-size-xs: 0.75rem;
  --fb-font-size-sm: 0.84rem;
  --fb-font-size-base: 0.94rem;
  --fb-font-size-md: 1.03rem;
  --fb-font-size-lg: 1.18rem;
  --fb-font-size-xl: clamp(1.45rem, 2vw, 1.9rem);
  --fb-font-size-2xl: clamp(2rem, 5vw, 3rem);
  --fb-font-size-3xl: clamp(2.5rem, 7vw, 4.5rem);
  --fb-line-height-tight: 1.25;
  --fb-line-height-base: 1.62;
  --fb-content-measure: 105ch;

  /* Spacing */
  --fb-space-1: 0.25rem;
  --fb-space-2: 0.5rem;
  --fb-space-3: 0.75rem;
  --fb-space-4: 1rem;
  --fb-space-5: 1.25rem;
  --fb-space-6: 1.5rem;
  --fb-space-8: 2rem;
  --fb-space-10: 2.5rem;
  --fb-space-12: 3rem;
  --fb-space-16: 4rem;

  /* Shape, depth, and motion */
  --fb-radius-sm: 6px;
  --fb-radius-md: 7px;
  --fb-radius-lg: 8px;
  --fb-radius-pill: 999px;
  --fb-shadow-soft: 0 2px 10px rgb(0 0 0 / 0.14);
  --fb-shadow-inset: inset 0 1px 0 rgb(255 255 255 / 0.025);
  --fb-shadow-overlay: 0 10px 35px rgb(0 0 0 / 0.35);
  --fb-transition-fast: 140ms ease;

  /* Layout */
  --fb-container-max: 1200px;
  --fb-content-max: 1560px;
  --fb-sidebar-width: clamp(220px, 19vw, 300px);
  --fb-toc-width: clamp(180px, 16vw, 260px);
  --fb-layout-gap: 1.25rem;
  --fb-page-padding: clamp(0.9rem, 2.5vw, 1.6rem);
  --fb-sticky-offset: 1rem;
  --fb-control-height: 2.5rem;
}

/* ==========================================================================
   02. RESET, INHERITANCE, AND DOCUMENT BASE
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  min-width: 0;
  font-family: inherit;
}

html {
  overflow-x: clip;
  scroll-behavior: smooth;
  scroll-padding-top: var(--fb-sticky-offset);
  background: var(--fb-color-background);
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: clip;
  color: var(--fb-color-text);
  background: var(--fb-color-background);
  font-family: var(--fb-font-mono);
  font-size: var(--fb-font-size-base);
  line-height: var(--fb-line-height-base);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

button,
input,
textarea,
select,
option,
optgroup {
  color: inherit;
  font: inherit;
}

::before,
::after,
::placeholder {
  font-family: inherit;
}

img,
svg,
video,
audio,
canvas,
iframe,
embed,
object {
  display: block;
  max-width: 100%;
}

img,
video {
  height: auto;
}

svg text,
svg tspan {
  font-family: var(--fb-font-mono);
}

[hidden] {
  display: none;
}

::selection {
  color: var(--fb-color-on-primary);
  background: var(--fb-color-primary);
}

:focus-visible {
  outline: 2px solid var(--fb-color-primary);
  outline-offset: 3px;
}

:target {
  scroll-margin-top: var(--fb-sticky-offset);
}

/* ==========================================================================
   03. TYPOGRAPHY AND CONTENT FLOW
   ========================================================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--fb-color-text);
  line-height: var(--fb-line-height-tight);
  text-wrap: balance;
}

h1 {
  margin: 0 0 var(--fb-space-5);
  font-size: var(--fb-font-size-2xl);
}

h2 {
  margin: var(--fb-space-8) 0 var(--fb-space-4);
  padding-bottom: var(--fb-space-2);
  border-bottom: 1px solid var(--fb-color-border);
  font-size: var(--fb-font-size-xl);
}

h3 {
  margin: var(--fb-space-6) 0 var(--fb-space-3);
  color: var(--fb-color-primary);
  font-size: var(--fb-font-size-lg);
}

h4 {
  margin: var(--fb-space-5) 0 var(--fb-space-2);
  font-size: var(--fb-font-size-md);
}

h5,
h6 {
  margin: var(--fb-space-4) 0 var(--fb-space-2);
  font-size: var(--fb-font-size-base);
}

p,
ul,
ol,
dl,
blockquote,
pre,
table,
figure,
details,
address {
  margin-top: 0;
  margin-bottom: var(--fb-space-4);
}

p {
  max-width: var(--fb-content-measure);
}

ul,
ol {
  padding-left: 1.4rem;
}

ul ul,
ul ol,
ol ul,
ol ol {
  margin-top: var(--fb-space-1);
  margin-bottom: var(--fb-space-1);
}

li + li {
  margin-top: var(--fb-space-1);
}

li::marker {
  color: var(--fb-color-primary);
}

dl {
  display: grid;
  grid-template-columns: minmax(9rem, max-content) minmax(0, 1fr);
  gap: var(--fb-space-2) var(--fb-space-4);
}

dt {
  color: var(--fb-color-primary);
  font-weight: 800;
}

dd {
  margin: 0;
}

a {
  color: var(--fb-color-primary);
  text-decoration-color:
    color-mix(in srgb, var(--fb-color-primary) 60%, transparent);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--fb-color-info);
}

strong {
  color: var(--fb-color-text);
}

small,
.u-text-muted {
  color: var(--fb-color-text-muted);
}

abbr[title] {
  cursor: help;
  text-decoration-color: var(--fb-color-primary);
  text-underline-offset: 0.16em;
}

address {
  font-style: normal;
}

hr {
  margin: var(--fb-space-8) 0;
  border: 0;
  border-top: 1px solid var(--fb-color-border);
}

mark {
  padding: 0.08em 0.28em;
  border-radius: 4px;
  color: var(--fb-color-on-warning);
  background: var(--fb-color-warning);
}

kbd {
  display: inline-block;
  padding: 0.1rem 0.38rem;
  border: 1px solid var(--fb-color-border);
  border-bottom-width: 2px;
  border-radius: 5px;
  color: var(--fb-color-text);
  background: var(--fb-color-surface-alt);
  box-shadow: var(--fb-shadow-inset);
  font-size: 0.86em;
}

samp,
var {
  color: var(--fb-color-info);
}

/* ==========================================================================
   04. GENERAL PAGE LAYOUTS
   ========================================================================== */

.fb-container {
  width: min(100% - (var(--fb-page-padding) * 2), var(--fb-container-max));
  margin-inline: auto;
}

.fb-container--wide {
  max-width: var(--fb-content-max);
}

.fb-page {
  min-height: 100vh;
}

.fb-main {
  padding-block: var(--fb-space-8) var(--fb-space-16);
}

.fb-section {
  padding-block: var(--fb-space-10);
}

.fb-section--muted {
  border-block: 1px solid var(--fb-color-border);
  background: var(--fb-color-surface);
}

.fb-section-header {
  display: grid;
  gap: var(--fb-space-2);
  max-width: 80ch;
  margin-bottom: var(--fb-space-6);
}

.fb-section-header > * {
  margin: 0;
}

.fb-grid {
  display: grid;
  grid-template-columns:
    repeat(auto-fit, minmax(min(100%, var(--fb-grid-min, 240px)), 1fr));
  gap: var(--fb-grid-gap, var(--fb-space-4));
}

.fb-grid--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.fb-grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.fb-grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.fb-sidebar-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 0.34fr);
  gap: var(--fb-layout-gap);
  align-items: start;
}

.fb-stack {
  display: grid;
  gap: var(--fb-stack-gap, var(--fb-space-4));
}

.fb-flow > * + * {
  margin-top: var(--fb-flow-space, var(--fb-space-4));
}

.fb-cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--fb-cluster-gap, var(--fb-space-2));
}

.fb-split-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--fb-space-4);
}

/* ==========================================================================
   05. SITE HEADER, NAVIGATION, BREADCRUMBS, AND FOOTER
   ========================================================================== */

.fb-skip-link {
  position: fixed;
  z-index: 1000;
  top: var(--fb-space-2);
  left: var(--fb-space-2);
  padding: var(--fb-space-2) var(--fb-space-3);
  border-radius: var(--fb-radius-sm);
  color: var(--fb-color-on-primary);
  background: var(--fb-color-primary);
  font-weight: 800;
  transform: translateY(-160%);
  transition: transform var(--fb-transition-fast);
}

.fb-skip-link:focus {
  transform: translateY(0);
}

.fb-site-header {
  position: relative;
  z-index: 20;
  border-bottom: 1px solid var(--fb-color-border);
  background: var(--fb-color-surface);
  box-shadow: var(--fb-shadow-soft);
}

.fb-site-header--sticky {
  position: sticky;
  top: 0;
}

.fb-navbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--fb-space-3) var(--fb-space-5);
  min-height: 4rem;
  padding-block: var(--fb-space-2);
}

.fb-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--fb-space-2);
  color: var(--fb-color-text);
  font-size: var(--fb-font-size-md);
  font-weight: 900;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.fb-brand-mark {
  display: grid;
  width: 2rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--fb-color-primary);
  border-radius: var(--fb-radius-sm);
  color: var(--fb-color-primary);
  background:
    color-mix(in srgb, var(--fb-color-primary) 8%, var(--fb-color-surface));
}

.fb-nav {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--fb-space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

.fb-nav li {
  margin: 0;
}

.fb-nav a {
  display: block;
  padding: 0.45rem 0.62rem;
  border-radius: var(--fb-radius-sm);
  color: var(--fb-color-text-muted);
  text-decoration: none;
}

.fb-nav a:hover,
.fb-nav a[aria-current="page"],
.fb-nav a[aria-current="location"] {
  color: var(--fb-color-text);
  background: var(--fb-color-surface-alt);
}

.fb-nav a[aria-current="page"],
.fb-nav a[aria-current="location"] {
  color: var(--fb-color-primary);
}

.fb-navbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--fb-space-2);
  margin-left: auto;
}

.fb-breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--fb-space-1);
  margin: 0 0 var(--fb-space-4);
  padding: 0;
  list-style: none;
  color: var(--fb-color-text-muted);
  font-size: var(--fb-font-size-sm);
}

.fb-breadcrumbs li {
  margin: 0;
}

.fb-breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-inline: var(--fb-space-2);
  color: var(--fb-color-border);
}

.fb-site-footer {
  padding-block: var(--fb-space-8);
  border-top: 1px solid var(--fb-color-border);
  color: var(--fb-color-text-muted);
  background: var(--fb-color-code-background);
}

.fb-site-footer a {
  color: inherit;
}

/* ==========================================================================
   06. HERO, METRICS, AND PUBLIC-PAGE CONTENT
   ========================================================================== */

.fb-hero-section {
  padding-bottom: var(--fb-space-10);
}

.fb-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: clamp(var(--fb-space-8), 6vw, var(--fb-space-16));
  align-items: center;
  padding-block: clamp(var(--fb-space-10), 8vw, 6rem);
}

.fb-hero-copy {
  display: grid;
  gap: var(--fb-space-4);
}

.fb-hero-copy > * {
  margin: 0;
}

.fb-eyebrow {
  color: var(--fb-color-primary);
  font-size: var(--fb-font-size-xs);
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.fb-display {
  font-size: var(--fb-font-size-3xl);
  line-height: 1.03;
  letter-spacing: -0.045em;
}

.fb-lead {
  max-width: 70ch;
  color: var(--fb-color-text-muted);
  font-size: var(--fb-font-size-md);
}

.fb-hero-panel {
  padding: var(--fb-space-5);
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-lg);
  background: var(--fb-color-code-background);
  box-shadow: var(--fb-shadow-soft), var(--fb-shadow-inset);
}

.fb-metrics {
  display: grid;
  grid-template-columns:
    repeat(auto-fit, minmax(min(100%, 10rem), 1fr));
  gap: var(--fb-space-3);
}

.fb-metric {
  padding: var(--fb-space-4);
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-md);
  background: var(--fb-color-surface);
}

.fb-metric-value {
  display: block;
  color: var(--fb-color-primary);
  font-size: var(--fb-font-size-xl);
  font-weight: 900;
  line-height: 1.1;
}

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

/* ==========================================================================
   07. DOCUMENTATION LAYOUT
   ========================================================================== */

.fb-doc-shell {
  display: grid;
  grid-template-columns:
    var(--fb-sidebar-width)
    minmax(0, 1fr)
    var(--fb-toc-width);
  gap: var(--fb-layout-gap);
  width: min(100%, var(--fb-content-max));
  min-height: 100vh;
  margin-inline: auto;
  padding: var(--fb-page-padding);
}

.fb-doc-sidebar,
.fb-doc-toc {
  position: sticky;
  top: var(--fb-sticky-offset);
  align-self: start;
  max-height: calc(100vh - (var(--fb-sticky-offset) * 2));
  overflow: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--fb-color-border) transparent;
}

.fb-doc-main,
.fb-doc-content {
  width: 100%;
}

.fb-doc-nav-panel,
.fb-doc-toc-panel {
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-lg);
  background: var(--fb-color-surface);
  box-shadow: var(--fb-shadow-soft), var(--fb-shadow-inset);
}

.fb-doc-nav-panel {
  padding: var(--fb-space-3);
}

.fb-doc-toc-panel {
  padding: var(--fb-space-4);
}

.fb-doc-nav-title,
.fb-doc-toc-title {
  margin: 0 0 var(--fb-space-3);
  color: var(--fb-color-text);
  font-size: var(--fb-font-size-sm);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fb-doc-nav-list,
.fb-doc-nav-list ul,
.fb-doc-toc-list,
.fb-doc-toc-list ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.fb-doc-nav-list li,
.fb-doc-toc-list li {
  margin: 0;
}

.fb-doc-nav-list ul,
.fb-doc-toc-list ul {
  margin-top: var(--fb-space-1);
  padding-left: var(--fb-space-3);
  border-left: 1px solid
    color-mix(in srgb, var(--fb-color-border) 70%, transparent);
}

.fb-doc-nav-list a,
.fb-doc-toc-list a {
  display: block;
  overflow-wrap: anywhere;
  border-radius: var(--fb-radius-sm);
  color: var(--fb-color-text-muted);
  text-decoration: none;
  transition:
    color var(--fb-transition-fast),
    background-color var(--fb-transition-fast);
}

.fb-doc-nav-list a {
  padding: 0.48rem 0.58rem;
}

.fb-doc-toc-list a {
  padding: 0.3rem 0.4rem;
  font-size: var(--fb-font-size-xs);
  line-height: 1.42;
}

.fb-doc-nav-list a:hover,
.fb-doc-toc-list a:hover {
  color: var(--fb-color-text);
  background: var(--fb-color-surface-alt);
}

.fb-doc-nav-list a[aria-current="page"],
.fb-doc-nav-list a[aria-current="location"],
.fb-doc-toc-list a[aria-current="true"] {
  color: var(--fb-color-primary);
  background:
    color-mix(in srgb, var(--fb-color-primary) 11%, var(--fb-color-surface));
}

.fb-doc-nav-group + .fb-doc-nav-group {
  margin-top: var(--fb-space-2);
}

.fb-doc-nav-group-label {
  margin: 0;
  padding: var(--fb-space-2) 0.58rem var(--fb-space-1);
  color: var(--fb-color-text-muted);
  font-size: var(--fb-font-size-xs);
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.fb-doc-header {
  margin-bottom: var(--fb-space-6);
  padding: clamp(1.25rem, 2vw, 2rem);
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-lg);
  background: var(--fb-color-surface);
  box-shadow: var(--fb-shadow-soft), var(--fb-shadow-inset);
}

.fb-doc-eyebrow {
  margin: 0 0 var(--fb-space-2);
  color: var(--fb-color-primary);
  font-size: var(--fb-font-size-xs);
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.fb-doc-title {
  margin: 0;
  color: var(--fb-color-text);
  font-size: var(--fb-font-size-2xl);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.fb-doc-subtitle {
  max-width: 90ch;
  margin: var(--fb-space-3) 0 0;
  color: var(--fb-color-text-muted);
  font-size: var(--fb-font-size-md);
}

.fb-doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--fb-space-2);
  margin-top: var(--fb-space-4);
}

.fb-doc-section {
  scroll-margin-top: var(--fb-sticky-offset);
}

.fb-doc-section + .fb-doc-section {
  margin-top: var(--fb-space-10);
  padding-top: var(--fb-space-2);
  border-top: 1px solid var(--fb-color-border);
}

/* ==========================================================================
   08. CARDS, BADGES, AND TAGS
   ========================================================================== */

.fb-card {
  padding: var(--fb-space-5);
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-md);
  background: var(--fb-color-surface);
  box-shadow: var(--fb-shadow-soft), var(--fb-shadow-inset);
}

.fb-doc-content > .fb-card + .fb-card {
  margin-top: var(--fb-space-4);
}

.fb-card-title {
  margin: 0 0 var(--fb-space-2);
  color: var(--fb-color-primary);
  font-size: var(--fb-font-size-md);
}

.fb-card > :last-child {
  margin-bottom: 0;
}

.fb-card--subtle {
  background: var(--fb-color-surface-alt);
  box-shadow: var(--fb-shadow-inset);
}

.fb-card--interactive {
  transition:
    border-color var(--fb-transition-fast),
    transform var(--fb-transition-fast);
}

.fb-card--interactive:hover,
.fb-card--interactive:focus-within {
  border-color: var(--fb-color-primary);
  transform: translateY(-1px);
}

.fb-card-grid {
  display: grid;
  grid-template-columns:
    repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  align-items: stretch;
  gap: var(--fb-space-3);
  margin-bottom: var(--fb-space-4);
}

.fb-card-grid > .fb-card {
  height: 100%;
  margin-top: 0;
}

.fb-badge {
  display: inline-flex;
  align-items: center;
  min-height: 1.6rem;
  padding: 0.2rem 0.52rem;
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-pill);
  color: var(--fb-color-text-muted);
  background: var(--fb-color-surface-alt);
  font-size: var(--fb-font-size-xs);
  font-weight: 800;
  line-height: 1;
  white-space: nowrap;
}

.fb-badge--primary {
  color: var(--fb-color-primary);
  border-color:
    color-mix(in srgb, var(--fb-color-primary) 48%, var(--fb-color-border));
  background:
    color-mix(in srgb, var(--fb-color-primary) 10%, var(--fb-color-surface));
}

.fb-badge--info {
  color: var(--fb-color-info);
}

.fb-badge--success {
  color: var(--fb-color-success);
}

.fb-badge--warning {
  color: var(--fb-color-warning);
}

.fb-badge--danger {
  color: var(--fb-color-danger);
}

/* ==========================================================================
   09. BUTTONS, LINKS, AND ACTION GROUPS
   ========================================================================== */

.fb-button {
  display: inline-flex;
  min-height: var(--fb-control-height);
  align-items: center;
  justify-content: center;
  gap: var(--fb-space-2);
  padding: 0.52rem 0.85rem;
  border: 1px solid var(--fb-color-primary);
  border-radius: var(--fb-radius-sm);
  color: var(--fb-color-on-primary);
  background: var(--fb-color-primary);
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition:
    border-color var(--fb-transition-fast),
    color var(--fb-transition-fast),
    background-color var(--fb-transition-fast),
    transform var(--fb-transition-fast);
}

.fb-button:hover {
  color: var(--fb-color-on-primary);
  background: var(--fb-color-primary-hover);
  transform: translateY(-1px);
}

.fb-button:active {
  transform: translateY(0);
}

.fb-button--secondary {
  border-color: var(--fb-color-border);
  color: var(--fb-color-text);
  background: var(--fb-color-surface-alt);
}

.fb-button--secondary:hover {
  border-color: var(--fb-color-primary);
  color: var(--fb-color-primary);
  background: var(--fb-color-surface);
}

.fb-button--ghost {
  border-color: transparent;
  color: var(--fb-color-primary);
  background: transparent;
}

.fb-button--ghost:hover {
  border-color: var(--fb-color-border);
  color: var(--fb-color-info);
  background: var(--fb-color-surface);
}

.fb-button--danger {
  border-color: var(--fb-color-danger-action);
  color: var(--fb-color-on-danger);
  background: var(--fb-color-danger-action);
}

.fb-button--danger:hover {
  border-color: var(--fb-color-danger-action-hover);
  color: var(--fb-color-on-danger);
  background: var(--fb-color-danger-action-hover);
}

.fb-button--sm {
  min-height: 2rem;
  padding: 0.35rem 0.62rem;
  font-size: var(--fb-font-size-sm);
}

.fb-button--block {
  width: 100%;
}

.fb-button:disabled,
.fb-button[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

.fb-button-group {
  display: inline-flex;
  flex-wrap: wrap;
}

.fb-button-group > .fb-button {
  border-radius: 0;
}

.fb-button-group > .fb-button:first-child {
  border-radius: var(--fb-radius-sm) 0 0 var(--fb-radius-sm);
}

.fb-button-group > .fb-button:last-child {
  border-radius: 0 var(--fb-radius-sm) var(--fb-radius-sm) 0;
}

.fb-button-group > .fb-button + .fb-button {
  margin-left: -1px;
}

/* ==========================================================================
   10. FORMS AND NATIVE CONTROLS
   ========================================================================== */

fieldset {
  min-width: 0;
  margin: 0 0 var(--fb-space-4);
  padding: var(--fb-space-4);
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-md);
}

legend {
  padding-inline: var(--fb-space-2);
  color: var(--fb-color-primary);
  font-weight: 800;
}

label {
  color: var(--fb-color-text);
  font-size: var(--fb-font-size-sm);
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  min-height: var(--fb-control-height);
  padding: 0.55rem 0.68rem;
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-sm);
  color: var(--fb-color-text);
  background: var(--fb-color-code-background);
  box-shadow: var(--fb-shadow-inset);
}

input,
select {
  height: var(--fb-control-height);
}

.fb-select {
  position: relative;
  color: var(--fb-color-text-muted);
}

.fb-select::after {
  content: "";
  position: absolute;
  top: 50%;
  right: var(--fb-space-3);
  width: 0.48rem;
  height: 0.48rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  pointer-events: none;
  transform: translateY(-70%) rotate(45deg);
}

.fb-select:focus-within {
  color: var(--fb-color-primary);
}

.fb-select:has(select:disabled)::after {
  opacity: 0.55;
}

.fb-select select {
  padding-right: calc(var(--fb-space-8) + var(--fb-space-1));
  appearance: none;
  -webkit-appearance: none;
}

textarea {
  min-height: 7rem;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: var(--fb-color-text-muted);
  opacity: 0.72;
}

input:hover,
select:hover,
textarea:hover {
  border-color: var(--fb-color-text-muted);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--fb-color-primary);
}

input:disabled,
select:disabled,
textarea:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

input[type="checkbox"],
input[type="radio"] {
  width: 1rem;
  min-height: auto;
  height: 1rem;
  margin: 0;
  padding: 0;
  accent-color: var(--fb-color-primary);
}

input[type="color"] {
  width: 3rem;
  padding: 0.2rem;
}

input[type="file"] {
  height: auto;
  min-height: auto;
}

input[type="file"]::file-selector-button {
  margin: -0.55rem var(--fb-space-3) -0.55rem -0.68rem;
  padding: 0.55rem 0.68rem;
  border: 0;
  border-right: 1px solid var(--fb-color-border);
  color: var(--fb-color-text);
  background: var(--fb-color-surface-alt);
  font: inherit;
  cursor: pointer;
}

input[type="range"] {
  padding-inline: 0;
  accent-color: var(--fb-color-primary);
}

.fb-form-grid {
  display: grid;
  grid-template-columns:
    repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  align-items: start;
  gap: var(--fb-space-4);
}

.fb-field {
  display: grid;
  gap: var(--fb-space-1);
}

.fb-field-help {
  color: var(--fb-color-text-muted);
  font-size: var(--fb-font-size-xs);
}

.fb-field-error {
  color: var(--fb-color-danger);
  font-size: var(--fb-font-size-xs);
}

.fb-field:has([aria-invalid="true"]) input,
.fb-field:has([aria-invalid="true"]) select,
.fb-field:has([aria-invalid="true"]) textarea {
  border-color: var(--fb-color-danger);
}

.fb-check {
  display: inline-flex;
  align-items: flex-start;
  gap: var(--fb-space-2);
  font-weight: 400;
  cursor: pointer;
}

.fb-check input {
  flex: none;
  margin-top: 0.3em;
}

.fb-input-group {
  display: flex;
}

.fb-input-group > input {
  border-radius: var(--fb-radius-sm) 0 0 var(--fb-radius-sm);
}

.fb-input-group > .fb-button {
  flex: none;
  margin-left: -1px;
  border-radius: 0 var(--fb-radius-sm) var(--fb-radius-sm) 0;
}

output,
.fb-output {
  display: block;
  padding: var(--fb-space-3);
  border-left: 3px solid var(--fb-color-primary);
  color: var(--fb-color-info);
  background: var(--fb-color-code-background);
}

/* ==========================================================================
   11. FEEDBACK, CALLOUTS, PROGRESS, AND STATUS
   ========================================================================== */

.fb-callout {
  padding: var(--fb-space-4) var(--fb-space-4) var(--fb-space-4) 1.15rem;
  border: 1px solid var(--fb-color-border);
  border-left-width: 4px;
  border-radius: var(--fb-radius-md);
  background: var(--fb-color-surface);
  box-shadow: var(--fb-shadow-inset);
}

.fb-callout + .fb-callout {
  margin-top: var(--fb-space-3);
}

.fb-callout-title {
  margin: 0 0 var(--fb-space-1);
  font-size: var(--fb-font-size-sm);
  font-weight: 800;
}

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

.fb-callout--info {
  border-left-color: var(--fb-color-info);
  background:
    color-mix(in srgb, var(--fb-color-info) 6%, var(--fb-color-surface));
}

.fb-callout--info .fb-callout-title {
  color: var(--fb-color-info);
}

.fb-callout--success {
  border-left-color: var(--fb-color-success);
  background:
    color-mix(in srgb, var(--fb-color-success) 6%, var(--fb-color-surface));
}

.fb-callout--success .fb-callout-title {
  color: var(--fb-color-success);
}

.fb-callout--warning {
  border-left-color: var(--fb-color-warning);
  background:
    color-mix(in srgb, var(--fb-color-warning) 6%, var(--fb-color-surface));
}

.fb-callout--warning .fb-callout-title {
  color: var(--fb-color-warning);
}

.fb-callout--danger {
  border-left-color: var(--fb-color-danger);
  background:
    color-mix(in srgb, var(--fb-color-danger) 6%, var(--fb-color-surface));
}

.fb-callout--danger .fb-callout-title {
  color: var(--fb-color-danger);
}

progress,
meter {
  width: 100%;
  height: 0.8rem;
  accent-color: var(--fb-color-primary);
}

progress {
  overflow: hidden;
  border: 0;
  border-radius: var(--fb-radius-pill);
  background: var(--fb-color-surface-alt);
}

progress::-webkit-progress-bar {
  background: var(--fb-color-surface-alt);
}

progress::-webkit-progress-value {
  background: var(--fb-color-primary);
}

progress::-moz-progress-bar {
  background: var(--fb-color-primary);
}

.fb-status {
  display: inline-flex;
  align-items: center;
  gap: var(--fb-space-2);
}

.fb-status::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--fb-status-color, var(--fb-color-text-muted));
}

.fb-status--success {
  --fb-status-color: var(--fb-color-success);
}

.fb-status--warning {
  --fb-status-color: var(--fb-color-warning);
}

.fb-status--danger {
  --fb-status-color: var(--fb-color-danger);
}

/* ==========================================================================
   12. NATIVE ACCORDIONS, DIALOGS, POPOVERS, AND TOOLTIP TEXT
   ========================================================================== */

details {
  overflow: hidden;
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-md);
  background: var(--fb-color-surface);
  box-shadow: var(--fb-shadow-inset);
}

details + details {
  margin-top: var(--fb-space-3);
}

summary {
  position: relative;
  padding: var(--fb-space-3) 2.5rem var(--fb-space-3) var(--fb-space-4);
  color: var(--fb-color-text);
  font-weight: 800;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: var(--fb-space-4);
  color: var(--fb-color-primary);
  font-size: 1.15rem;
  transform: translateY(-50%);
}

summary:hover {
  background:
    color-mix(in srgb, var(--fb-color-primary) 5%, var(--fb-color-surface));
}

details[open] summary {
  border-bottom: 1px solid var(--fb-color-border);
  background: var(--fb-color-surface-alt);
}

details[open] summary::after {
  content: "\2212";
}

.fb-details-body {
  padding: var(--fb-space-4);
}

.fb-details-body > :last-child {
  margin-bottom: 0;
}

dialog,
[popover] {
  width: min(calc(100% - (var(--fb-page-padding) * 2)), 36rem);
  max-height: calc(100vh - (var(--fb-page-padding) * 2));
  overflow: auto;
  padding: var(--fb-space-5);
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-lg);
  color: var(--fb-color-text);
  background: var(--fb-color-surface);
  box-shadow: var(--fb-shadow-overlay);
}

dialog::backdrop,
[popover]::backdrop {
  background: var(--fb-color-backdrop);
}

.fb-tooltip {
  padding: var(--fb-space-2) var(--fb-space-3);
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-sm);
  color: var(--fb-color-text);
  background: var(--fb-color-code-background);
  box-shadow: var(--fb-shadow-soft);
  font-size: var(--fb-font-size-xs);
}

/* ==========================================================================
   13. TABLES AND DATA
   ========================================================================== */

.fb-table-wrap {
  width: 100%;
  margin-bottom: var(--fb-space-4);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-md);
  background: var(--fb-color-surface);
  box-shadow: var(--fb-shadow-inset);
}

table {
  width: 100%;
  min-width: 680px;
  margin: 0;
  border-collapse: collapse;
  font-size: var(--fb-font-size-sm);
  font-variant-numeric: tabular-nums;
}

caption {
  padding: var(--fb-space-3) var(--fb-space-4);
  color: var(--fb-color-text-muted);
  text-align: left;
  caption-side: top;
}

th,
td {
  padding: 0.72rem 0.82rem;
  border-bottom: 1px solid
    color-mix(in srgb, var(--fb-color-border) 72%, transparent);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--fb-color-primary);
  background: var(--fb-color-surface-alt);
  font-weight: 800;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover {
  background:
    color-mix(in srgb, var(--fb-color-primary) 4%, var(--fb-color-surface));
}

.fb-cell-number,
.fb-cell-right {
  text-align: right;
  white-space: nowrap;
}

.fb-table--compact th,
.fb-table--compact td {
  padding: 0.48rem 0.62rem;
}

.fb-table--striped tbody tr:nth-child(even) {
  background:
    color-mix(in srgb, var(--fb-color-surface-alt) 38%, transparent);
}

/* ==========================================================================
   14. CODE AND TERMINAL OUTPUT
   ========================================================================== */

code,
samp,
var {
  font-family: var(--fb-font-mono);
}

code {
  color: var(--fb-color-info);
  font-size: 0.92em;
}

:not(pre) > code {
  padding: 0.12em 0.34em;
  border: 1px solid
    color-mix(in srgb, var(--fb-color-border) 70%, transparent);
  border-radius: 5px;
  background: var(--fb-color-surface-alt);
  overflow-wrap: anywhere;
  white-space: nowrap;
}

.fb-code-block {
  overflow: hidden;
  margin-bottom: var(--fb-space-4);
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-md);
  background: var(--fb-color-code-background);
  box-shadow: var(--fb-shadow-soft), var(--fb-shadow-inset);
}

.fb-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--fb-space-3);
  padding: 0.58rem 0.78rem;
  border-bottom: 1px solid var(--fb-color-border);
  background: var(--fb-color-surface-alt);
}

.fb-code-file {
  overflow: hidden;
  color: var(--fb-color-text);
  font-size: var(--fb-font-size-xs);
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.fb-code-language {
  flex: none;
  color: var(--fb-color-primary);
  font-size: var(--fb-font-size-xs);
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.fb-code-block pre,
.fb-terminal {
  margin: 0;
  padding: var(--fb-space-4);
  overflow: auto;
  overscroll-behavior-inline: contain;
  color: var(--fb-color-text);
  background: transparent;
  tab-size: 2;
}

.fb-code-block pre code {
  color: inherit;
  font-size: var(--fb-font-size-sm);
  line-height: 1.58;
}

.fb-code-block--wrap pre,
.fb-code-block--wrap code {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.fb-terminal {
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-md);
  background: var(--fb-color-code-background);
  font-size: var(--fb-font-size-sm);
  white-space: pre;
}

/* ==========================================================================
   15. QUOTES, CITATIONS, AND DEFINITION CONTENT
   ========================================================================== */

blockquote {
  margin-left: 0;
  padding: var(--fb-space-3) var(--fb-space-4);
  border-left: 3px solid var(--fb-color-primary);
  border-radius: 0 var(--fb-radius-md) var(--fb-radius-md) 0;
  color: var(--fb-color-text-muted);
  background: var(--fb-color-surface);
}

blockquote > :last-child {
  margin-bottom: 0;
}

cite {
  color: var(--fb-color-text-muted);
}

/* ==========================================================================
   16. MEDIA, FIGURES, AVATARS, AND GALLERY
   ========================================================================== */

figure {
  overflow: hidden;
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-md);
  background: var(--fb-color-surface);
  box-shadow: var(--fb-shadow-soft), var(--fb-shadow-inset);
}

figure img,
figure video {
  width: 100%;
  background: var(--fb-color-surface-alt);
}

figcaption {
  padding: var(--fb-space-3) var(--fb-space-4);
  border-top: 1px solid var(--fb-color-border);
  color: var(--fb-color-text-muted);
  font-size: var(--fb-font-size-sm);
}

.fb-media-contain img,
.fb-media-contain video {
  max-height: 70vh;
  object-fit: contain;
}

.fb-media-wide {
  width: 100%;
}

.fb-image-grid {
  display: grid;
  grid-template-columns:
    repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  gap: var(--fb-space-3);
}

.fb-gallery {
  display: grid;
  grid-template-columns:
    repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: var(--fb-space-3);
  margin-bottom: var(--fb-space-4);
}

.fb-gallery--compact {
  grid-template-columns:
    repeat(auto-fit, minmax(min(100%, 160px), 1fr));
  gap: var(--fb-space-2);
}

.fb-gallery-item {
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-md);
  background: var(--fb-color-surface);
  box-shadow: var(--fb-shadow-soft), var(--fb-shadow-inset);
  transition:
    border-color var(--fb-transition-fast),
    transform var(--fb-transition-fast);
}

.fb-gallery-item:hover {
  border-color: var(--fb-color-primary);
  transform: translateY(-1px);
}

.fb-gallery-link {
  display: block;
  height: 100%;
  color: inherit;
  text-decoration: none;
}

.fb-gallery-media {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--fb-color-surface-alt);
}

.fb-gallery-media img,
.fb-gallery-media svg,
.fb-gallery-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--fb-transition-fast);
}

.fb-gallery-link:hover .fb-gallery-media img,
.fb-gallery-link:hover .fb-gallery-media svg,
.fb-gallery-link:hover .fb-gallery-media video {
  transform: scale(1.015);
}

.fb-gallery-item figcaption {
  min-height: 3.2rem;
  padding: var(--fb-space-3);
  border-top: 1px solid var(--fb-color-border);
  color: var(--fb-color-text-muted);
  font-size: var(--fb-font-size-sm);
  line-height: 1.45;
}

.fb-gallery-item figcaption strong {
  display: block;
  margin-bottom: var(--fb-space-1);
  color: var(--fb-color-text);
}

.fb-gallery-item--wide {
  grid-column: span 2;
}

.fb-gallery-item--portrait .fb-gallery-media {
  aspect-ratio: 4 / 5;
}

.fb-gallery-item--square .fb-gallery-media {
  aspect-ratio: 1;
}

.fb-gallery-item--contain .fb-gallery-media img,
.fb-gallery-item--contain .fb-gallery-media svg,
.fb-gallery-item--contain .fb-gallery-media video {
  padding: var(--fb-space-3);
  object-fit: contain;
}

.fb-avatar {
  width: var(--fb-avatar-size, 2.5rem);
  height: var(--fb-avatar-size, 2.5rem);
  overflow: hidden;
  border: 1px solid var(--fb-color-border);
  border-radius: 50%;
  background: var(--fb-color-surface-alt);
  object-fit: cover;
}

/* ==========================================================================
   17. TABS, PAGINATION, STEPS, AND EMPTY STATES
   ========================================================================== */

.fb-tabs {
  display: flex;
  gap: var(--fb-space-1);
  margin-bottom: var(--fb-space-4);
  overflow-x: auto;
  border-bottom: 1px solid var(--fb-color-border);
}

.fb-tab {
  flex: none;
  padding: var(--fb-space-2) var(--fb-space-3);
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--fb-color-text-muted);
  background: transparent;
  text-decoration: none;
  cursor: pointer;
}

.fb-tab:hover,
.fb-tab[aria-selected="true"],
.fb-tab[aria-current="page"],
.fb-tab[aria-current="location"] {
  border-bottom-color: var(--fb-color-primary);
  color: var(--fb-color-primary);
}

.fb-pagination {
  display: flex;
  flex-wrap: wrap;
  gap: var(--fb-space-1);
  margin: var(--fb-space-4) 0;
  padding: 0;
  list-style: none;
}

.fb-pagination li {
  margin: 0;
}

.fb-pagination a,
.fb-pagination span {
  display: grid;
  min-width: 2.25rem;
  min-height: 2.25rem;
  place-items: center;
  padding: var(--fb-space-1) var(--fb-space-2);
  border: 1px solid var(--fb-color-border);
  border-radius: var(--fb-radius-sm);
  color: var(--fb-color-text-muted);
  text-decoration: none;
}

.fb-pagination a:hover,
.fb-pagination [aria-current="page"] {
  border-color: var(--fb-color-primary);
  color: var(--fb-color-primary);
  background: var(--fb-color-surface);
}

.fb-steps {
  display: grid;
  gap: var(--fb-space-3);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: fb-step;
}

.fb-step {
  position: relative;
  margin: 0;
  min-height: 2.5rem;
  padding-left: 3.25rem;
  counter-increment: fb-step;
}

.fb-step::before {
  content: counter(fb-step);
  position: absolute;
  left: 0;
  display: grid;
  width: 2.3rem;
  height: 2.3rem;
  place-items: center;
  border: 1px solid var(--fb-color-border);
  border-radius: 50%;
  color: var(--fb-color-primary);
  background: var(--fb-color-surface);
  font-weight: 900;
}

.fb-empty {
  padding: var(--fb-space-10) var(--fb-space-5);
  border: 1px dashed var(--fb-color-border);
  border-radius: var(--fb-radius-md);
  color: var(--fb-color-text-muted);
  text-align: center;
}

.fb-empty > :last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   18. ANCHORS AND TARGET HIGHLIGHTING
   ========================================================================== */

.fb-anchor-heading {
  position: relative;
}

.fb-anchor-heading > a {
  color: inherit;
  text-decoration: none;
}

.fb-anchor-heading > a:hover::after {
  content: " #";
  color: var(--fb-color-primary);
}

section:target,
.fb-card:target,
details:target,
figure:target {
  animation: fb-target-flash 900ms ease-out;
}

@keyframes fb-target-flash {
  0% {
    box-shadow:
      0 0 0 3px
      color-mix(in srgb, var(--fb-color-primary) 55%, transparent);
  }

  100% {
    box-shadow: var(--fb-shadow-soft);
  }
}

/* ==========================================================================
   19. UTILITIES
   ========================================================================== */

.u-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.u-no-margin {
  margin: 0;
}

.u-full-width {
  width: 100%;
}

.u-text-primary {
  color: var(--fb-color-primary);
}

.u-text-info {
  color: var(--fb-color-info);
}

.u-text-success {
  color: var(--fb-color-success);
}

.u-text-warning {
  color: var(--fb-color-warning);
}

.u-text-danger {
  color: var(--fb-color-danger);
}

.u-text-left {
  text-align: left;
}

.u-text-center {
  text-align: center;
}

.u-text-right {
  text-align: right;
}

.u-nowrap {
  white-space: nowrap;
}

.u-break-anywhere {
  overflow-wrap: anywhere;
  white-space: normal;
}

.u-overflow-auto {
  overflow: auto;
  overscroll-behavior: contain;
}

/* ==========================================================================
   20. SCROLLBARS
   ========================================================================== */

* {
  scrollbar-width: thin;
  scrollbar-color: var(--fb-color-border) transparent;
}

*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

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

*::-webkit-scrollbar-thumb {
  border: 3px solid transparent;
  border-radius: var(--fb-radius-pill);
  background: var(--fb-color-border);
  background-clip: padding-box;
}

*::-webkit-scrollbar-thumb:hover {
  background: var(--fb-color-text-muted);
  background-clip: padding-box;
}

/* ==========================================================================
   21. RESPONSIVE BEHAVIOR
   ========================================================================== */

@media (max-width: 1180px) {
  .fb-doc-shell {
    grid-template-columns: var(--fb-sidebar-width) minmax(0, 1fr);
  }

  .fb-doc-toc {
    display: none;
  }

  .fb-grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .fb-hero,
  .fb-sidebar-layout {
    grid-template-columns: 1fr;
  }

  .fb-hero-panel {
    order: -1;
  }

  .fb-doc-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .fb-doc-sidebar {
    position: static;
    max-height: none;
  }

  .fb-doc-nav-panel {
    padding: var(--fb-space-2);
  }

  .fb-doc-nav-list {
    display: flex;
    gap: var(--fb-space-1);
    overflow-x: auto;
    overscroll-behavior-inline: contain;
  }

  .fb-doc-nav-list > li {
    flex: none;
  }

  .fb-doc-nav-list ul,
  .fb-doc-nav-group-label {
    display: none;
  }

  .fb-grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  :root {
    --fb-page-padding: 0.75rem;
    --fb-layout-gap: 0.75rem;
  }

  body {
    font-size: 0.9rem;
  }

  .fb-navbar {
    align-items: flex-start;
  }

  .fb-nav {
    flex-basis: 100%;
    order: 3;
    overflow-x: auto;
    flex-wrap: nowrap;
  }

  .fb-nav li {
    flex: none;
    margin: 0;
  }

  .fb-navbar-actions {
    margin-left: auto;
  }

  .fb-grid--2,
  .fb-grid--3,
  .fb-grid--4,
  .fb-split-grid {
    grid-template-columns: 1fr;
  }

  .fb-button-group {
    display: flex;
    width: 100%;
  }

  .fb-button-group > .fb-button {
    flex: 1;
  }

  dl {
    grid-template-columns: 1fr;
    gap: var(--fb-space-1);
  }

  dd + dt {
    margin-top: var(--fb-space-3);
  }

  .fb-doc-header,
  .fb-card {
    padding: var(--fb-space-4);
  }

  .fb-gallery-item--wide {
    grid-column: auto;
  }

  .fb-table-wrap {
    max-width: calc(100vw - (var(--fb-page-padding) * 2));
  }

  .fb-code-header {
    align-items: flex-start;
  }
}

/* ==========================================================================
   22. ACCESSIBILITY, USER PREFERENCES, AND PRINT
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto;
    animation-duration: 0.01ms;
    animation-iteration-count: 1;
    transition-duration: 0.01ms;
  }
}

@media (prefers-contrast: more) {
  :root {
    --fb-color-border: #9ea7af;
    --fb-color-text-muted: #d5dadd;
  }
}

@media print {
  html:root {
    --fb-color-scheme: light;
    --fb-color-background: #ffffff;
    --fb-color-surface: #ffffff;
    --fb-color-surface-alt: #f2f4f5;
    --fb-color-surface-raised: #e5e9ec;
    --fb-color-border: #687078;
    --fb-color-text-muted: #343a40;
    --fb-color-text: #111417;
    --fb-color-primary: #06717c;
    --fb-color-primary-hover: #055d65;
    --fb-color-on-primary: #ffffff;
    --fb-color-secondary: #075d66;
    --fb-color-info: #075f75;
    --fb-color-success: #176b35;
    --fb-color-warning: #6f4b00;
    --fb-color-on-warning: #ffffff;
    --fb-color-danger: #a1261b;
    --fb-color-danger-action: #a1261b;
    --fb-color-danger-action-hover: #7f1e16;
    --fb-color-on-danger: #ffffff;
    --fb-color-code-background: #f2f4f5;
    --fb-color-backdrop: transparent;
    --fb-shadow-soft: none;
    --fb-shadow-inset: none;
    --fb-shadow-overlay: none;
  }

  body {
    overflow: visible;
  }

  .fb-site-header,
  .fb-site-footer,
  .fb-doc-sidebar,
  .fb-doc-toc,
  .fb-button,
  .fb-skip-link {
    display: none;
  }

  .fb-doc-shell {
    display: block;
    width: 100%;
    padding: 0;
  }

  a {
    color: inherit;
    text-decoration: underline;
  }

  .fb-card,
  .fb-callout,
  .fb-code-block,
  figure,
  details {
    break-inside: avoid;
  }
}