:root {
  --color-brand-primary: #0f766e;
  --color-brand-content: #115e59;
}

.sidebar-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}

.sidebar-brand .sidebar-logo,
.sidebar-brand img {
  width: min(120px, 100%);
  height: auto;
  display: block;
}

.sidebar-brand-text {
  line-height: 1.25;
}

body {
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.08), transparent 30%),
    radial-gradient(circle at top right, rgba(30, 64, 175, 0.06), transparent 24%),
    var(--color-background-primary);
}

.page,
.main,
.content,
.article-container {
  background-color: transparent;
}

html[data-theme="light"] body,
body[data-theme="light"] {
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.08), transparent 30%),
    radial-gradient(circle at top right, rgba(30, 64, 175, 0.06), transparent 24%),
    var(--color-background-primary);
}

html[data-theme="light"] .page,
html[data-theme="light"] .main,
html[data-theme="light"] .content,
html[data-theme="light"] .article-container,
body[data-theme="light"] .page,
body[data-theme="light"] .main,
body[data-theme="light"] .content,
body[data-theme="light"] .article-container {
  background-color: transparent;
}

html[data-theme="dark"] body,
body[data-theme="dark"] {
  background:
    radial-gradient(circle at top left, rgba(230, 122, 76, 0.09), transparent 30%),
    radial-gradient(circle at top right, rgba(120, 188, 255, 0.08), transparent 24%),
    var(--color-background-primary);
}

html[data-theme="dark"] .page,
html[data-theme="dark"] .main,
html[data-theme="dark"] .content,
html[data-theme="dark"] .article-container,
body[data-theme="dark"] .page,
body[data-theme="dark"] .main,
body[data-theme="dark"] .content,
body[data-theme="dark"] .article-container {
  background-color: transparent;
}

@media (prefers-color-scheme: dark) {
  body:not([data-theme="light"]) {
    background:
      radial-gradient(circle at top left, rgba(230, 122, 76, 0.09), transparent 30%),
      radial-gradient(circle at top right, rgba(120, 188, 255, 0.08), transparent 24%),
      var(--color-background-primary);
  }

  body:not([data-theme="light"]) .page,
  body:not([data-theme="light"]) .main,
  body:not([data-theme="light"]) .content,
  body:not([data-theme="light"]) .article-container {
    background-color: transparent;
  }
}

.hero-band {
  padding: 1.4rem 0 2rem;
}

.hero-brand {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(240px, 0.8fr);
  align-items: center;
  gap: 2rem;
}

.hero-copy {
  min-width: 0;
}

.hero-logo {
  width: min(100%, 420px);
  justify-self: end;
  display: block;
  filter: drop-shadow(0 18px 28px rgba(15, 23, 42, 0.14));
}

.hero-kicker,
.article-kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-brand-primary);
  margin-bottom: 0.7rem;
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.02;
  margin: 0 0 1rem;
}

.hero-lead {
  max-width: 48rem;
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--color-foreground-secondary);
  margin: 0;
}

@media (max-width: 960px) {
  .hero-brand {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .hero-logo {
    width: min(100%, 340px);
    justify-self: start;
  }
}

.article-hero {
  padding-top: 0.25rem;
  padding-bottom: 1.15rem;
  margin-bottom: 1.4rem;
  border-bottom: 1px solid var(--color-background-border);
}

.article-subtitle {
  max-width: 46rem;
  font-size: 1.12rem;
  line-height: 1.7;
  color: var(--color-foreground-secondary);
  margin-bottom: 0.7rem;
}

.article-meta {
  font-size: 0.95rem;
  color: var(--color-foreground-muted);
}

.landing-card,
.article-card,
.module-card,
.tutorial-card {
  border-radius: 18px;
  border: 1px solid var(--color-background-border);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.landing-card p:last-child,
.article-card p:last-child,
.module-card p:last-child,
.tutorial-card p:last-child {
  margin-bottom: 0;
}

.note-shell {
  border-radius: 16px;
  border: 1px solid rgba(15, 118, 110, 0.18);
  background: rgba(15, 118, 110, 0.05);
}

.note-shell .admonition-title {
  color: var(--color-brand-content);
}

.toc-tree .reference.internal {
  line-height: 1.45;
}

.content-icon-container,
.toc-drawer {
  backdrop-filter: blur(12px);
}

.sim-embed-card {
  margin: 1.4rem 0 2rem;
}

.sim-breakout-section {
  position: relative;
  left: 50%;
  width: 100vw;
  margin-left: -50vw;
  margin-right: -50vw;
  padding: 0 32px;
  box-sizing: border-box;
}

.sim-breakout-inner {
  width: min(1280px, calc(100vw - 64px));
  margin: 0 auto;
}

.sim-breakout-inner--robot {
  width: min(1520px, calc(100vw - 48px));
}

.sim-embed-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.sim-embed-kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-brand-primary);
  margin-bottom: 0.5rem;
}

.sim-embed-title {
  margin: 0;
  font-size: 1.4rem;
}

.sim-open-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(15, 118, 110, 0.2);
  background: rgba(15, 118, 110, 0.08);
  color: var(--color-brand-content);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.sim-open-link:hover {
  background: rgba(15, 118, 110, 0.14);
  text-decoration: none;
}

.sim-embed-frame {
  display: block;
  width: 100%;
  height: clamp(680px, 78vh, 920px);
  min-height: 0;
  border: 1px solid var(--color-background-border);
  border-radius: 18px;
  background: #11151c;
  overflow: hidden;
}

.math-wrapper,
.math {
  overflow-x: auto;
}

@media (max-width: 960px) {
  .sim-breakout-section {
    left: 0;
    width: 100%;
    margin-left: 0;
    margin-right: 0;
    padding: 0;
  }

  .sim-breakout-inner {
    width: 100%;
  }

  .sim-breakout-inner--robot {
    width: 100%;
  }

  .sim-embed-header {
    flex-direction: column;
    align-items: stretch;
  }

  .sim-open-link {
    width: 100%;
  }

  .sim-embed-frame {
    height: clamp(560px, 76vh, 860px);
    min-height: 0;
  }
}