:root {
  color-scheme: light;
  --color-background-layout: #f2f3f3;
  --color-background-container: #ffffff;
  --color-background-header: #232f3e;
  --color-background-header-hover: #31465f;
  --color-background-input: #ffffff;
  --color-background-button-primary: #0972d3;
  --color-background-button-primary-hover: #033160;
  --color-background-button-normal: #ffffff;
  --color-background-status-info: #e9f3ff;
  --color-background-status-success: #f2f8f0;
  --color-background-alert: #f1f8ff;
  --color-border-divider: #eaeded;
  --color-border-control: #879596;
  --color-border-container: #d5dbdb;
  --color-border-focus: #0972d3;
  --color-border-status-success: #1d8102;
  --color-text-heading: #16191f;
  --color-text-body: #16191f;
  --color-text-secondary: #5f6b7a;
  --color-text-link: #0972d3;
  --color-text-link-hover: #033160;
  --color-text-inverted: #ffffff;
  --color-text-status-success: #037f0c;
  --color-text-status-info: #0972d3;
  --color-focus-ring: rgba(9, 114, 211, 0.32);
  --shadow-container: 0 1px 1px rgba(0, 28, 36, 0.06), 0 1px 3px rgba(0, 28, 36, 0.12);
  --radius-control: 8px;
  --radius-container: 10px;
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-s: 12px;
  --space-m: 16px;
  --space-l: 20px;
  --space-xl: 24px;
  --space-xxl: 32px;
  --space-xxxl: 40px;
  --content-width: 1180px;
  --side-nav-width: 228px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-background-layout);
  color: var(--color-text-body);
  font-family: "Open Sans", Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-text-link);
  text-decoration: none;
}

a:hover {
  color: var(--color-text-link-hover);
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 2px;
  border-radius: 4px;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  color: var(--color-text-heading);
}

h1 {
  margin-bottom: var(--space-m);
  font-size: clamp(2rem, 4vw, 2.625rem);
  font-weight: 700;
  line-height: 1.15;
}

h2 {
  margin-bottom: var(--space-xs);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
}

h3 {
  margin-bottom: var(--space-xs);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.3;
}

code,
pre {
  font-family: Monaco, Menlo, Consolas, "Courier Prime", Courier, "Courier New", monospace;
}

code {
  border-radius: 4px;
  background: #eef0f3;
  padding: 1px 4px;
  font-size: 0.9em;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1000;
  transform: translateY(-150%);
  border: 2px solid var(--color-border-focus);
  border-radius: var(--radius-control);
  background: var(--color-background-container);
  padding: 8px 12px;
  font-weight: 700;
}

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

.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: 52px;
  background: var(--color-background-header);
  color: var(--color-text-inverted);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.28);
}

.app-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-l);
  width: min(100%, 1440px);
  min-height: 52px;
  margin-inline: auto;
  padding: 0 var(--space-xl);
}

.app-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-s);
  color: var(--color-text-inverted);
  font-size: 0.95rem;
  font-weight: 700;
}

.app-brand:hover {
  color: var(--color-text-inverted);
  text-decoration: none;
}

.app-brand__mark {
  display: inline-grid;
  place-items: center;
  min-width: 42px;
  height: 28px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 5px;
  background: #161e2d;
  color: #ff9900;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.app-header__links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.app-header__links a {
  border-radius: 4px;
  color: #f2f3f3;
  padding: 8px 10px;
  font-size: 0.85rem;
  font-weight: 600;
}

.app-header__links a:hover {
  background: var(--color-background-header-hover);
  color: #ffffff;
  text-decoration: none;
}

.app-layout {
  display: grid;
  grid-template-columns: var(--side-nav-width) minmax(0, 1fr);
  width: min(100%, 1440px);
  min-height: calc(100vh - 52px);
  margin-inline: auto;
}

.side-navigation {
  position: sticky;
  top: 52px;
  align-self: start;
  height: calc(100vh - 52px);
  overflow-y: auto;
  border-right: 1px solid var(--color-border-divider);
  background: #ffffff;
  padding: var(--space-xl) var(--space-m);
}

.side-navigation__title {
  margin-bottom: var(--space-s);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.side-navigation a {
  display: block;
  border-left: 3px solid transparent;
  color: var(--color-text-body);
  padding: 8px 10px;
  font-size: 0.88rem;
}

.side-navigation a:hover {
  border-left-color: var(--color-text-link);
  background: #f4f8fb;
  color: var(--color-text-link-hover);
  text-decoration: none;
}

.main-content {
  min-width: 0;
  padding-bottom: var(--space-xxxl);
}

.page-header {
  border-bottom: 1px solid var(--color-border-divider);
  background: #ffffff;
  padding: var(--space-xl) clamp(20px, 4vw, 48px) var(--space-xxl);
}

.page-header__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.8fr);
  gap: var(--space-xxl);
  align-items: start;
  max-width: var(--content-width);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-m);
  color: var(--color-text-secondary);
  font-size: 0.82rem;
}

.breadcrumb a {
  color: var(--color-text-link);
}

.page-label,
.section-kicker,
.service-card__label,
.article-meta,
.panel-label,
.eyebrow {
  margin-bottom: var(--space-xs);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.page-summary,
.lead {
  max-width: 760px;
  margin-bottom: var(--space-xl);
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.6;
}

.key-value-panel {
  margin: 0;
  border: 1px solid var(--color-border-container);
  border-radius: var(--radius-container);
  background: var(--color-background-container);
  box-shadow: var(--shadow-container);
}

.key-value-panel div {
  display: grid;
  grid-template-columns: 135px 1fr;
  gap: var(--space-m);
  border-top: 1px solid var(--color-border-divider);
  padding: 12px 14px;
}

.key-value-panel div:first-child {
  border-top: 0;
}

.key-value-panel dt {
  color: var(--color-text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
}

.key-value-panel dd {
  margin: 0;
  font-weight: 600;
}

.button-row,
.hero-actions,
.status-row,
.repo-links,
.inline-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs);
}

.button,
.text-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  padding: 7px 14px;
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
}

.button:hover,
.text-button:hover {
  text-decoration: none;
}

.button--primary,
.button.primary {
  border-color: var(--color-background-button-primary);
  background: var(--color-background-button-primary);
  color: #ffffff;
}

.button--primary:hover,
.button.primary:hover {
  border-color: var(--color-background-button-primary-hover);
  background: var(--color-background-button-primary-hover);
  color: #ffffff;
}

.button--normal,
.button:not(.button--primary):not(.primary) {
  border-color: var(--color-border-control);
  background: var(--color-background-button-normal);
  color: var(--color-text-link-hover);
}

.button--normal:hover,
.button:not(.button--primary):not(.primary):hover {
  border-color: var(--color-text-link-hover);
  background: #f2f8fd;
}

.status-row {
  max-width: var(--content-width);
  margin-top: var(--space-xl);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 0.78rem;
  font-weight: 700;
}

.status--success,
.verification-badge {
  background: var(--color-background-status-success);
  color: var(--color-text-status-success);
}

.status--info {
  background: var(--color-background-status-info);
  color: var(--color-text-status-info);
}

.content-section,
.section {
  max-width: calc(var(--content-width) + 96px);
  margin-inline: auto;
  padding: var(--space-xxl) clamp(20px, 4vw, 48px) 0;
}

.section.alt {
  max-width: none;
  border-block: 1px solid var(--color-border-divider);
  background: #f7f8f8;
  padding-bottom: var(--space-xxl);
}

.section.alt > .container {
  width: min(var(--content-width), calc(100% - 40px));
  margin-inline: auto;
}

.section-header,
.section-heading {
  max-width: 800px;
  margin-bottom: var(--space-m);
}

.section-header p,
.section-heading p:not(.section-kicker) {
  margin-bottom: 0;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.container,
.content-width {
  width: min(var(--content-width), calc(100% - 40px));
  margin-inline: auto;
}

.container-card,
.card,
.figure-card,
.doclink,
.code-panel,
.notice,
.repo-card,
.reference-card,
.component-demo,
.feature-story,
.cta-panel,
.mini-cta {
  border: 1px solid var(--color-border-container);
  border-radius: var(--radius-container);
  background: var(--color-background-container);
  box-shadow: var(--shadow-container);
}

.container-card,
.card,
.repo-card,
.reference-card,
.component-demo,
.cta-panel,
.mini-cta {
  padding: var(--space-xl);
}

.container-card p:last-child,
.card p:last-child {
  margin-bottom: 0;
}

.three-column-grid,
.three-up,
.article-grid,
.repo-grid,
.source-grid,
.external-rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-m);
}

.two-column-grid,
.two-up,
.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-m);
}

.summary-item {
  padding: var(--space-s) var(--space-m);
}

.summary-item + .summary-item {
  border-left: 1px solid var(--color-border-divider);
}

.summary-item p {
  margin-bottom: 0;
  color: var(--color-text-secondary);
}

.architecture-figure,
.figure-card {
  overflow: hidden;
  margin: 0 0 var(--space-m);
  padding: var(--space-m);
}

.architecture-figure img,
.diagram {
  width: 100%;
  border-radius: 6px;
  background: #ffffff;
}

.architecture-figure figcaption,
.figure-card figcaption {
  margin-top: var(--space-s);
  color: var(--color-text-secondary);
  font-size: 0.78rem;
  text-align: center;
}

.service-card {
  min-height: 180px;
}

.service-card p:last-child {
  color: var(--color-text-secondary);
}

.check-list,
.plain-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.plain-list li {
  position: relative;
  margin: 10px 0;
  padding-left: 25px;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-text-status-success);
  font-weight: 800;
}

.plain-list li::before {
  content: "•";
  position: absolute;
  left: 8px;
  color: var(--color-text-link);
}

.inline-link {
  display: inline-flex;
  align-items: center;
  margin-top: var(--space-s);
  font-weight: 700;
}

.inline-link::after {
  content: " →";
}

.operation-list {
  display: grid;
}

.operation-list > div {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: var(--space-m);
  border-top: 1px solid var(--color-border-divider);
  padding: var(--space-m) 0;
}

.operation-list > div:first-child {
  border-top: 0;
  padding-top: 0;
}

.operation-list > div:last-child {
  padding-bottom: 0;
}

.operation-list__number {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--color-background-status-info);
  color: var(--color-text-status-info);
  font-weight: 800;
}

.operation-list h3,
.operation-list p {
  margin-bottom: 4px;
}

.operation-list p {
  color: var(--color-text-secondary);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-m);
  margin-bottom: var(--space-m);
}

.metric {
  border: 1px solid var(--color-border-container);
  border-radius: var(--radius-container);
  background: #ffffff;
  padding: var(--space-l);
  box-shadow: var(--shadow-container);
}

.metric strong {
  display: block;
  color: var(--color-text-heading);
  font-size: 1.75rem;
  line-height: 1.1;
}

.metric span {
  display: block;
  margin-top: 6px;
  color: var(--color-text-secondary);
  font-size: 0.8rem;
}

.article-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border-container);
  border-radius: var(--radius-container);
  background: #ffffff;
  box-shadow: var(--shadow-container);
}

.article-card > img,
.article-card__media {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #eef0f3;
  border-bottom: 1px solid var(--color-border-divider);
}

.article-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: var(--space-l);
}

.article-card__body p {
  color: var(--color-text-secondary);
}

.article-card__body a {
  margin-top: auto;
  padding-top: var(--space-s);
  font-weight: 700;
}

.article-meta {
  text-transform: none;
}

.section-action {
  margin: var(--space-m) 0 0;
}

.alert {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: var(--space-m);
  border: 1px solid #7fb4e8;
  border-radius: var(--radius-container);
  background: var(--color-background-alert);
  padding: var(--space-l);
}

.alert__icon {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-text-link);
  color: #ffffff;
  font-weight: 800;
}

.alert h3 {
  margin-bottom: 4px;
}

.alert p {
  margin-bottom: 0;
}

.closing-panel,
.mini-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.closing-panel p,
.mini-cta p {
  max-width: 700px;
  margin-bottom: 0;
  color: var(--color-text-secondary);
}

.site-footer,
.footer {
  margin-top: var(--space-xxxl);
  border-top: 1px solid var(--color-border-container);
  background: #ffffff;
  color: var(--color-text-secondary);
  padding: var(--space-xl);
  text-align: center;
}

.site-footer p,
.footer p {
  margin: 5px 0;
}

.site-footer span,
.footer span {
  margin: 0 6px;
}

.code-panel {
  overflow: hidden;
  background: #161e2d;
  color: #ffffff;
}

.code-title {
  display: flex;
  justify-content: space-between;
  gap: var(--space-m);
  border-bottom: 1px solid #414d5c;
  background: #232f3e;
  padding: 10px 14px;
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
}

.code-panel pre {
  overflow-x: auto;
  margin: 0;
  padding: var(--space-l);
  font-size: 0.82rem;
  line-height: 1.65;
}

.faq-list {
  display: grid;
  gap: var(--space-xs);
}

.faq-list details {
  border: 1px solid var(--color-border-container);
  border-radius: var(--radius-container);
  background: #ffffff;
  padding: 14px 16px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
}

.faq-list details p {
  margin: var(--space-s) 0 0;
  color: var(--color-text-secondary);
}

.verification-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--color-border-container);
  background: #ffffff;
}

.verification-table th,
.verification-table td {
  border-bottom: 1px solid var(--color-border-divider);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

.verification-table th {
  background: #f2f3f3;
  color: var(--color-text-heading);
  font-size: 0.78rem;
  font-weight: 700;
}

.verification-table tr:last-child td {
  border-bottom: 0;
}

.small-note {
  color: var(--color-text-secondary);
  font-size: 0.78rem;
}

@media (max-width: 980px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .side-navigation {
    position: static;
    display: flex;
    height: auto;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--color-border-divider);
    padding: 8px 16px;
  }

  .side-navigation__title {
    display: none;
  }

  .side-navigation a {
    flex: 0 0 auto;
    border-left: 0;
    border-bottom: 3px solid transparent;
    white-space: nowrap;
  }

  .side-navigation a:hover {
    border-bottom-color: var(--color-text-link);
  }

  .page-header__grid,
  .three-column-grid,
  .three-up,
  .article-grid,
  .repo-grid,
  .source-grid,
  .external-rail,
  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .summary-item + .summary-item {
    border-left: 0;
  }

  .closing-panel,
  .mini-cta {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 700px) {
  .app-header__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 0;
    padding: 10px 16px;
  }

  .app-header__links {
    width: 100%;
    overflow-x: auto;
  }

  .app-header__links a:first-child {
    padding-left: 0;
  }

  .page-header,
  .content-section,
  .section {
    padding-inline: 16px;
  }

  .page-header__grid,
  .two-column-grid,
  .two-up,
  .two-col,
  .three-column-grid,
  .three-up,
  .article-grid,
  .repo-grid,
  .source-grid,
  .external-rail,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .key-value-panel div {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .button-row,
  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button,
  .text-button {
    width: 100%;
  }

  .summary-item {
    border-top: 1px solid var(--color-border-divider);
  }

  .summary-item:first-child {
    border-top: 0;
  }

  .verification-table {
    display: block;
    overflow-x: auto;
  }
}

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

@media print {
  .app-header,
  .side-navigation,
  .button-row,
  .site-footer {
    display: none;
  }

  .app-layout {
    display: block;
  }

  .page-header,
  .content-section {
    padding-inline: 0;
  }
}