:root {
  color-scheme: dark;
  --bg: #07080b;
  --surface: #0e1015;
  --surface-2: #141720;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f7f8fb;
  --muted: #9499a8;
  --accent: #9f7aea;
  --accent-2: #44c7ff;
  --accent-soft: rgba(159, 122, 234, 0.14);
  --header-height: 72px;
  --sidebar-width: 288px;
  --toc-width: 220px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 96px; }

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 15% -10%, rgba(68, 199, 255, 0.11), transparent 29rem),
    radial-gradient(circle at 100% 12%, rgba(159, 122, 234, 0.13), transparent 34rem),
    var(--bg);
  color: var(--text);
  font: 400 15px/1.75 Inter, system-ui, sans-serif;
}

a { color: inherit; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 28px;
  border-bottom: 1px solid var(--border);
  background: rgba(7, 8, 11, 0.82);
  backdrop-filter: blur(22px) saturate(160%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
}

.brand > span:last-child { display: flex; flex-direction: column; min-width: 0; line-height: 1.2; }
.brand strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 0.92rem; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; }

.portfolio-link {
  margin-left: auto;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.78rem;
  text-decoration: none;
  transition: 0.2s ease;
}

.portfolio-link:hover { color: var(--text); border-color: var(--border-strong); background: var(--surface-2); }

.menu-button {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
}

.docs-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 820px) var(--toc-width);
  justify-content: center;
  min-height: calc(100vh - var(--header-height));
}

.sidebar {
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  padding: 28px 20px 32px;
  border-right: 1px solid var(--border);
  background: rgba(9, 11, 15, 0.72);
  scrollbar-width: thin;
  scrollbar-color: #333741 transparent;
}

.sidebar::-webkit-scrollbar { width: 5px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { border-radius: 99px; background: #333741; }
.sidebar::-webkit-scrollbar-thumb:hover { background: #454a56; }

.search {
  display: block;
}

.search span {
  display: block;
  margin: 0 0 8px 1px;
  color: #737987;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.search input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  background: #0c0e13;
  color: var(--text);
  font: inherit;
  font-size: 0.82rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.search input::placeholder { color: #656b7a; }
.search input:focus { border-color: #555b68; box-shadow: 0 0 0 2px rgba(255,255,255,0.035); }

.nav-group { margin: 30px 0 0; }
.nav-group[hidden] { display: none; }
.nav-group h2 {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 8px 9px;
  color: #666c79;
  font-size: 0.61rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}
.nav-group h2::after { content: ''; height: 1px; flex: 1; background: var(--border); }
.nav-group a {
  position: relative;
  display: block;
  min-height: 0;
  margin: 1px 0;
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 7px;
  color: #9196a3;
  font-size: 0.8rem;
  line-height: 1.35;
  text-decoration: none;
  transition: color 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}
.nav-group a::before { content: ''; position: absolute; top: 8px; bottom: 8px; left: 0; width: 2px; border-radius: 2px; background: transparent; }
.nav-group a:hover { color: #d7d9df; background: rgba(255,255,255,0.025); }
.nav-group a.active {
  color: #fff;
  border-color: rgba(255,255,255,0.075);
  background: #15181e;
}
.nav-group a.active::before { background: #aeb3bf; }
.nav-group a[hidden] { display: none; }
.sidebar-note {
  margin: 36px 8px 0;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: #5f6572;
  font-size: 0.66rem;
  letter-spacing: 0.04em;
}

.content { min-width: 0; padding: 48px 62px 80px; }
.breadcrumbs { display: flex; gap: 9px; align-items: center; margin-bottom: 34px; color: #6f7482; font-size: 0.76rem; }
.breadcrumbs a { color: var(--accent-2); text-decoration: none; }

.markdown-body > :first-child { margin-top: 0; }
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 { position: relative; color: #fff; font-weight: 650; line-height: 1.25; letter-spacing: -0.025em; }
.markdown-body h1 { margin: 0 0 28px; font-size: clamp(2.1rem, 5vw, 3.25rem); }
.markdown-body h2 { margin: 52px 0 18px; padding-top: 8px; border-top: 1px solid var(--border); font-size: 1.55rem; }
.markdown-body h3 { margin: 34px 0 12px; font-size: 1.18rem; }
.markdown-body h4 { margin: 28px 0 10px; font-size: 1rem; }
.heading-anchor { position: absolute; right: calc(100% + 9px); color: var(--accent); opacity: 0; text-decoration: none; font-weight: 400; }
.markdown-body h1:hover .heading-anchor,
.markdown-body h2:hover .heading-anchor,
.markdown-body h3:hover .heading-anchor { opacity: 0.75; }

.markdown-body p,
.markdown-body li { color: #c4c7d0; }
.markdown-body p { margin: 16px 0; }
.markdown-body ul,
.markdown-body ol { padding-left: 1.4rem; }
.markdown-body li { margin: 7px 0; padding-left: 4px; }
.markdown-body strong { color: #f4f5f8; font-weight: 650; }
.markdown-body a { color: #72d4ff; text-decoration-color: rgba(114,212,255,0.35); text-underline-offset: 3px; }
.markdown-body a:hover { color: #a9e7ff; text-decoration-color: currentColor; }
.markdown-body blockquote { margin: 24px 0; padding: 1px 20px; border-left: 3px solid var(--accent); border-radius: 0 9px 9px 0; background: var(--accent-soft); }
.markdown-body blockquote p { color: #d9d3e9; }
.markdown-body hr { height: 1px; margin: 40px 0; border: 0; background: var(--border); }

.markdown-body code {
  padding: 0.14em 0.38em;
  border: 1px solid rgba(159, 122, 234, 0.2);
  border-radius: 5px;
  background: rgba(159, 122, 234, 0.1);
  color: #d9c8ff;
  font: 500 0.87em/1.5 "JetBrains Mono", monospace;
}

.markdown-body pre {
  position: relative;
  overflow: auto;
  margin: 22px 0;
  padding: 19px 21px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #0b0d12;
}
.markdown-body pre code { padding: 0; border: 0; background: transparent; color: #d8dae2; font-size: 0.82rem; }
.copy-code { position: absolute; top: 9px; right: 9px; padding: 5px 9px; border: 1px solid var(--border); border-radius: 7px; background: #151821; color: var(--muted); font: 600 0.65rem Inter, sans-serif; cursor: pointer; }
.copy-code:hover { color: #fff; border-color: var(--border-strong); }

.markdown-body table { width: 100%; margin: 24px 0; border-collapse: separate; border-spacing: 0; overflow: hidden; border: 1px solid var(--border); border-radius: 12px; font-size: 0.82rem; }
.markdown-body th,
.markdown-body td { padding: 11px 13px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.markdown-body th:last-child,
.markdown-body td:last-child { border-right: 0; }
.markdown-body tr:last-child td { border-bottom: 0; }
.markdown-body th { background: var(--surface-2); color: #fff; font-weight: 650; }
.markdown-body td { color: #bcc0cb; background: rgba(255,255,255,0.015); }
.markdown-body tbody tr:hover td { background: rgba(255,255,255,0.035); }

.page-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 68px; padding-top: 24px; border-top: 1px solid var(--border); }
.page-nav a { display: flex; flex-direction: column; gap: 4px; padding: 16px; border: 1px solid var(--border); border-radius: 12px; text-decoration: none; transition: 0.2s ease; }
.page-nav a:hover { border-color: rgba(159,122,234,0.45); background: var(--accent-soft); transform: translateY(-2px); }
.page-nav small { color: var(--muted); font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em; }
.page-nav strong { font-size: 0.84rem; }
.page-nav .next { text-align: right; }

.page-toc { position: sticky; top: var(--header-height); height: calc(100vh - var(--header-height)); padding: 48px 20px; border-left: 1px solid var(--border); }
.page-toc > strong { display: block; margin-bottom: 12px; color: #747987; font-size: 0.66rem; letter-spacing: 0.13em; text-transform: uppercase; }
.page-toc nav { display: flex; flex-direction: column; gap: 8px; }
.page-toc a,
.page-toc span { color: #747987; font-size: 0.74rem; line-height: 1.35; text-decoration: none; }
.page-toc a:hover,
.page-toc a.active { color: #d9c8ff; }
.page-toc .toc-level-3 { padding-left: 11px; }

.sidebar-backdrop { display: none; }

@media (max-width: 1120px) {
  .docs-shell { grid-template-columns: var(--sidebar-width) minmax(0, 820px); }
  .page-toc { display: none; }
}

@media (max-width: 780px) {
  :root { --header-height: 64px; }
  .topbar { gap: 12px; padding: 0 15px; }
  .menu-button { display: block; flex: 0 0 auto; }
  .brand strong { font-size: 0.78rem; }
  .brand small { font-size: 0.58rem; }
  .portfolio-link { padding: 8px 10px; font-size: 0.7rem; }
  .docs-shell { display: block; }
  .sidebar { position: fixed; top: var(--header-height); bottom: 0; left: 0; z-index: 40; width: min(86vw, 320px); height: auto; background: #0a0c11; transform: translateX(-102%); transition: transform 0.25s ease; }
  body.menu-open { overflow: hidden; }
  body.menu-open .sidebar { transform: translateX(0); }
  .sidebar-backdrop { position: fixed; inset: var(--header-height) 0 0; z-index: 35; width: 100%; border: 0; background: rgba(0,0,0,0.58); }
  body.menu-open .sidebar-backdrop { display: block; }
  .content { padding: 34px 24px 64px; }
  .breadcrumbs { margin-bottom: 24px; }
  .markdown-body h1 { font-size: 2rem; }
  .markdown-body h2 { font-size: 1.35rem; }
  .heading-anchor { display: none; }
  .markdown-body table { display: block; overflow-x: auto; white-space: nowrap; }
  .page-nav { grid-template-columns: 1fr; }
  .page-nav .next { text-align: left; }
}

@media (max-width: 460px) {
  .brand small { display: none; }
  .portfolio-link { border: 0; padding: 6px; }
  .content { padding-inline: 18px; }
}