:root {
  color-scheme: light dark;
  --max: 920px;
  --doc-max: 1264px;
  --aside-width: 260px;
  --sidebar-width: 260px;
}

:root,
:root[data-theme='dark'] {
  --bg: #0b1020;
  --panel: #121937;
  --panel-2: #0f1530;
  --text: #e6eaf2;
  --muted: #a3acc2;
  --link: #8ab4ff;
  --border: #27304f;
  --code: #0b1228;
  --accent: #7dd3fc;
  --callout: color-mix(in srgb, #12203b 72%, transparent);
  --callout-border: color-mix(in srgb, #335b94 70%, transparent);
  --button-bg: transparent;
  --button-hover: rgba(255,255,255,0.04);
  --button-active: rgba(255,255,255,0.06);
}

:root[data-theme='light'] {
  --bg: #f8fafc;
  --panel: #eef2ff;
  --panel-2: #e2e8f0;
  --text: #0f172a;
  --muted: #475569;
  --link: #1d4ed8;
  --border: #cbd5e1;
  --code: #f1f5f9;
  --accent: #0369a1;
  --callout: color-mix(in srgb, #eff6ff 78%, white);
  --callout-border: color-mix(in srgb, #60a5fa 58%, transparent);
  --button-bg: transparent;
  --button-hover: rgba(15,23,42,0.05);
  --button-active: rgba(15,23,42,0.08);
}

@media (prefers-color-scheme: light) {
  :root[data-theme='system'] {
    --bg: #f8fafc;
    --panel: #eef2ff;
    --panel-2: #e2e8f0;
    --text: #0f172a;
    --muted: #475569;
    --link: #1d4ed8;
    --border: #cbd5e1;
    --code: #f1f5f9;
    --accent: #0369a1;
    --callout: color-mix(in srgb, #eff6ff 78%, white);
    --callout-border: color-mix(in srgb, #60a5fa 58%, transparent);
    --button-bg: rgba(15,23,42,0.03);
    --button-hover: rgba(15,23,42,0.05);
    --button-active: rgba(15,23,42,0.07);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); }
body { font: 16px/1.6 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
body.sidebar-collapsed {
  --sidebar-width: 72px;
}
.layout { display: grid; grid-template-columns: var(--sidebar-width) minmax(0, 1fr); min-height: 100vh; }
.sidebar {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border-right: 1px solid var(--border);
  padding: 28px 20px;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.sidebar-main {
  min-height: 0;
  overflow-y: auto;
}
.brand { font-size: 1.2rem; font-weight: 800; color: var(--text); display: inline-block; margin-bottom: 14px; }
.tagline { display: none; }
.sidebar-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  opacity: 0.72;
}
.theme-control {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
}
.theme-icon-button,
.sidebar-toggle {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
}
.theme-icon-button:hover,
.sidebar-toggle:hover {
  background: var(--button-hover);
  color: var(--text);
}
.theme-icon-button.active {
  background: var(--button-active);
  border-color: transparent;
  color: var(--text);
}
.sidebar-toggle {
  border-color: var(--border);
  background: transparent;
  font-size: 0.82rem;
}
.sidebar.collapsed {
  padding-left: 12px;
  padding-right: 12px;
}
.sidebar.collapsed .sidebar-main,
.sidebar.collapsed .theme-control {
  display: none;
}
.sidebar.collapsed .sidebar-footer {
  border-top: 0;
  padding-top: 0;
  justify-content: center;
}
.nav-group { margin-bottom: 22px; }
.nav-group h2 {
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 8px;
}
.nav a {
  display: block;
  padding: 6px 9px;
  border-radius: 8px;
  color: var(--text);
  font-size: 0.92rem;
}
.nav a.active {
  background: var(--button-active);
  color: var(--text);
  font-weight: 600;
}
.content { padding: 32px 44px 60px; }
.page-header {
  margin-bottom: 24px;
}
.page-header-main { min-width: 0; }
.eyebrow { color: var(--muted); margin-bottom: 8px; }
.collapse-icon {
  display: inline-block;
  transform: rotate(0deg);
  transition: transform 0.15s ease;
}
.sidebar.collapsed .collapse-icon {
  transform: rotate(180deg);
}
.doc-content {
  max-width: var(--doc-max);
}
.doc-content h1, .doc-content h2, .doc-content h3, .doc-content h4 {
  line-height: 1.25;
  margin-top: 1.7em;
  margin-bottom: 0.5em;
}
.doc-content h1:first-child, .doc-content h2:first-child { margin-top: 0; }
.doc-content p, .doc-content ul, .doc-content ol, .doc-content pre, .doc-content blockquote, .doc-content .callout {
  margin: 0 0 1rem;
}
.doc-content ul, .doc-content ol { padding-left: 1.5rem; }
.doc-content li + li { margin-top: 0.35rem; }
.doc-content code {
  background: color-mix(in srgb, var(--text) 8%, transparent);
  padding: 0.12rem 0.35rem;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
}
.doc-content pre {
  background: var(--code);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  overflow-x: auto;
}
.doc-content pre code { background: transparent; padding: 0; }
.doc-content blockquote,
.callout {
  border-left: 3px solid var(--callout-border);
  background: var(--callout);
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 0.95rem;
  line-height: 1.5;
}
.callout-title {
  font-weight: 700;
  margin-bottom: 0.3rem;
  font-size: 0.95rem;
}
.callout p {
  margin-bottom: 0.7rem;
}
.callout-youtube-link {
  display: block;
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: #000;
}
.callout-youtube-thumb {
  aspect-ratio: 16 / 9;
  width: 100%;
  display: block;
  object-fit: cover;
}
.callout-youtube-play {
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  width: 52px;
  height: 38px;
  border-radius: 10px;
  background: rgba(15, 23, 42, 0.78);
  color: white;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.22);
}
.callout-youtube-caption {
  margin-top: 0.7rem;
  color: var(--muted);
  font-size: 0.9em;
}
.doc-content hr { border: 0; border-top: 1px solid var(--border); margin: 2rem 0; }
.doc-content table { border-collapse: collapse; width: 100%; margin-bottom: 1rem; }
.doc-content th, .doc-content td { border: 1px solid var(--border); padding: 0.6rem 0.7rem; text-align: left; }
.doc-content th { background: color-mix(in srgb, var(--text) 4%, transparent); }
@media (min-width: 1100px) {
  .doc-content.has-aside {
    padding-right: calc(var(--aside-width) + 24px);
  }
  .callout.callout-aside {
    clear: right;
    float: right;
    width: var(--aside-width);
    margin: 0 calc(-1 * (var(--aside-width) + 24px)) 1rem 24px;
  }
}
@media (max-width: 960px) {
  body.sidebar-collapsed {
    --sidebar-width: 1fr;
  }
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .content { padding: 24px 18px 48px; }
}