:root {
  --bg: #ffffff;
  --bg-sidebar: #f8fafc;
  --bg-card: #ffffff;
  --bg-code: #0f172a;
  --text: #0f172a;
  --text-2: #475569;
  --text-3: #94a3b8;
  --border: #e2e8f0;
  --accent: #0a9d6a;
  --accent-2: #14c98a;
  --accent-soft: rgba(20, 201, 138, 0.12);
  --navy: #071525;
  --tip: #0ea5e9;
  --tip-bg: #f0f9ff;
  --note: #8b5cf6;
  --note-bg: #f5f3ff;
  --warn: #f59e0b;
  --warn-bg: #fffbeb;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .06);
  --font: "Inter", "Plus Jakarta Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sidebar: 272px;
  --toc: 220px;
}
html.dark {
  --bg: #0b1220;
  --bg-sidebar: #071018;
  --bg-card: #0f1a2b;
  --bg-code: #020617;
  --text: #e8eef7;
  --text-2: #94a3b8;
  --text-3: #64748b;
  --border: #1e293b;
  --accent-soft: rgba(20, 201, 138, 0.16);
  --tip-bg: #0b2536;
  --note-bg: #1e1533;
  --warn-bg: #2a210c;
  --shadow: 0 8px 28px rgba(0, 0, 0, .35);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; }
code, kbd { font-family: var(--mono); font-size: .86em; }
.topbar {
  position: sticky; top: 0; z-index: 40;
  height: 56px; display: flex; align-items: center; gap: 12px;
  padding: 0 16px 0 18px;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 800; letter-spacing: -.02em; text-decoration: none; min-width: calc(var(--sidebar) - 18px); }
.brand img { width: 28px; height: 28px; border-radius: 7px; }
.brand span { color: var(--accent-2); }
.search {
  flex: 1; max-width: 520px; display: flex; align-items: center; gap: 8px;
  background: var(--bg-sidebar); border: 1px solid var(--border); border-radius: 10px;
  padding: 8px 12px; color: var(--text-3);
}
.search input {
  border: 0; outline: 0; background: transparent; width: 100%; color: var(--text); font: inherit;
}
.top-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.icon-btn, .ghost {
  border: 1px solid var(--border); background: var(--bg-card); color: var(--text);
  border-radius: 9px; padding: 7px 10px; cursor: pointer; font: inherit; font-size: 13px;
}
.layout { display: grid; grid-template-columns: var(--sidebar) minmax(0, 1fr) var(--toc); min-height: calc(100% - 56px); }
.sidebar {
  border-right: 1px solid var(--border); background: var(--bg-sidebar);
  padding: 18px 12px 48px; overflow: auto; position: sticky; top: 56px; height: calc(100vh - 56px);
}
.nav-group { margin-bottom: 18px; }
.nav-label {
  font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--text-3); padding: 4px 10px 8px;
}
.nav-link {
  display: block; padding: 7px 10px; border-radius: 8px; color: var(--text-2);
  font-size: 13.5px; font-weight: 500; text-decoration: none;
}
.nav-link:hover { background: var(--accent-soft); color: var(--text); text-decoration: none; }
.nav-link.active { background: var(--accent-soft); color: var(--accent); font-weight: 700; }
.content { padding: 36px 48px 80px; max-width: 860px; }
.crumbs { font-size: 13px; color: var(--text-3); margin-bottom: 10px; }
h1 { font-size: 2rem; letter-spacing: -.03em; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 1.25rem; margin: 2rem 0 .7rem; letter-spacing: -.02em; }
h3 { font-size: 1.05rem; margin: 1.4rem 0 .5rem; }
p { color: var(--text-2); margin: 0 0 1rem; }
.lead { font-size: 1.08rem; }
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 16px 0 24px; }
.cards.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card {
  display: block; border: 1px solid var(--border); background: var(--bg-card);
  border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow);
  color: inherit; text-decoration: none;
}
.card:hover { border-color: var(--accent-2); text-decoration: none; }
.card .ico { font-size: 18px; margin-bottom: 8px; }
.card h3 { margin: 0 0 6px; font-size: 15px; }
.card p { margin: 0; font-size: 13.5px; }
.callout { border-radius: 12px; padding: 12px 14px; margin: 14px 0 20px; border: 1px solid var(--border); }
.callout.tip { background: var(--tip-bg); border-color: color-mix(in srgb, var(--tip) 35%, var(--border)); }
.callout.note { background: var(--note-bg); border-color: color-mix(in srgb, var(--note) 35%, var(--border)); }
.callout.warn { background: var(--warn-bg); border-color: color-mix(in srgb, var(--warn) 40%, var(--border)); }
.callout strong { display: block; margin-bottom: 4px; font-size: 13px; }
.acc { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin: 10px 0 18px; }
.acc + .acc { margin-top: -1px; border-radius: 0; }
.acc:first-of-type { border-radius: 12px 12px 0 0; }
details.acc { background: var(--bg-card); }
details.acc summary {
  cursor: pointer; list-style: none; padding: 12px 14px; font-weight: 600; font-size: 14px;
}
details.acc summary::-webkit-details-marker { display: none; }
details.acc .acc-body { padding: 0 14px 14px; color: var(--text-2); font-size: 14px; }
.steps { margin: 12px 0 24px; }
.step { display: grid; grid-template-columns: 28px 1fr; gap: 12px; margin: 0 0 16px; }
.num {
  width: 28px; height: 28px; border-radius: 999px; background: var(--navy); color: #fff;
  display: grid; place-items: center; font-size: 13px; font-weight: 700;
}
.step h3 { margin: 2px 0 4px; }
pre {
  background: var(--bg-code); color: #e2e8f0; border-radius: 12px; padding: 14px 16px;
  overflow: auto; font-family: var(--mono); font-size: 13px; line-height: 1.55; margin: 0 0 18px;
}
table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 0 0 22px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--text-3); font-size: 12px; font-weight: 700; }
.toc {
  border-left: 1px solid var(--border); padding: 32px 16px;
  position: sticky; top: 56px; height: calc(100vh - 56px); overflow: auto;
}
.toc h4 { font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--text-3); margin-bottom: 10px; }
.toc a { display: block; color: var(--text-2); font-size: 13px; padding: 4px 0; text-decoration: none; }
.toc a:hover { color: var(--accent); }
.menu-btn { display: none; }
@media (max-width: 1080px) {
  .layout { grid-template-columns: var(--sidebar) minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: none; position: fixed; inset: 56px auto 0 0; width: min(86vw, 320px); z-index: 30; box-shadow: var(--shadow); }
  .sidebar.open { display: block; }
  .content { padding: 24px 18px 64px; }
  .cards, .cards.cols-3 { grid-template-columns: 1fr; }
  .brand { min-width: 0; }
  .menu-btn { display: inline-flex; }
}