@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root{
  --bg:#f5f7fb;
  --surface:#fff;
  --surface-2:#f8fafc;
  --surface-3:#eef2f7;
  --text:#182230;
  --muted:#66758a;
  --muted-2:#95a1af;
  --border:#e1e7ef;
  --accent:#5b5bd6;
  --accent-2:#7878e8;
  --accent-soft:#eeefff;
  --success:#2e9b67;
  --shadow:0 18px 55px rgba(20,35,60,.09);
  --radius:16px;
}
@media(prefers-color-scheme:dark){
  :root{
    --bg:#0b1018;--surface:#121923;--surface-2:#151e2a;--surface-3:#1b2634;
    --text:#e9eef5;--muted:#9aa8b8;--muted-2:#68778a;--border:#263343;
    --accent:#8989f7;--accent-2:#a1a1ff;--accent-soft:#252541;
    --shadow:0 22px 60px rgba(0,0,0,.28);
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  line-height:1.65;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.page-shell{min-height:100vh}
.page-header{
  position:sticky;top:0;z-index:20;
  background:color-mix(in srgb,var(--surface) 92%,transparent);
  border-bottom:1px solid var(--border);
  backdrop-filter:blur(14px);
}
.header-inner{
  max-width:1120px;margin:auto;padding:13px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none!important}
.brand img{width:32px;height:32px}
.brand-name{font-weight:800;letter-spacing:-.03em}
.brand-name .blue{color:#2563eb}.brand-name .orange{color:#f97316}
.header-nav{display:flex;align-items:center;gap:6px}
.header-nav a{
  padding:7px 10px;border-radius:8px;color:var(--muted);
  font-size:12px;font-weight:600;
}
.header-nav a:hover{background:var(--surface-3);color:var(--text);text-decoration:none}
.header-nav a.primary{
  background:var(--accent);color:#fff;
}
.header-nav a.primary:hover{background:var(--accent-2);color:#fff}
.main{max-width:1120px;margin:0 auto;padding:64px 24px 80px}
.hero{max-width:820px;margin-bottom:42px}
.eyebrow{
  display:inline-flex;align-items:center;gap:7px;
  color:var(--accent);font-size:11px;font-weight:800;
  text-transform:uppercase;letter-spacing:.13em;
}
.hero h1{
  margin:10px 0 14px;font-size:clamp(32px,5vw,52px);
  line-height:1.08;letter-spacing:-.045em;
}
.hero p{margin:0;color:var(--muted);font-size:16px;max-width:760px}
.layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:42px}
.toc{
  position:sticky;top:78px;align-self:start;
  padding:14px;border:1px solid var(--border);border-radius:13px;background:var(--surface);
}
.toc strong{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.1em;margin-bottom:8px}
.toc a{display:block;padding:6px 8px;border-radius:7px;font-size:11px;color:var(--muted)}
.toc a:hover{background:var(--surface-3);color:var(--text);text-decoration:none}
.content{min-width:0}
.section{
  padding:30px 0;border-top:1px solid var(--border);
  scroll-margin-top:82px;
}
.section:first-child{border-top:0;padding-top:0}
h2{font-size:25px;line-height:1.2;letter-spacing:-.025em;margin:0 0 12px}
h3{font-size:17px;line-height:1.3;margin:25px 0 8px}
h4{font-size:13px;margin:20px 0 7px}
p{font-size:13px;margin:8px 0 14px}
ul,ol{padding-left:21px;font-size:13px}
li{margin:5px 0}
strong{font-weight:700}
.kicker{
  font-size:10px;text-transform:uppercase;letter-spacing:.1em;
  color:var(--muted-2);font-weight:800;
}
.callout{
  margin:18px 0;padding:15px 16px;border:1px solid var(--border);
  border-left:3px solid var(--accent);border-radius:11px;background:var(--surface-2);
}
.callout strong{display:block;margin-bottom:3px}
.steps{counter-reset:step;display:grid;gap:9px;margin:16px 0}
.step{
  counter-increment:step;display:grid;grid-template-columns:30px 1fr;
  gap:11px;padding:12px;border:1px solid var(--border);
  border-radius:11px;background:var(--surface);
}
.step:before{
  content:counter(step);width:28px;height:28px;border-radius:8px;
  display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);
  font-weight:800;font-size:11px;
}
.step strong{display:block;font-size:12px;margin-bottom:2px}
.step span{font-size:12px;color:var(--muted)}
.card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:16px 0}
.card{
  border:1px solid var(--border);border-radius:12px;background:var(--surface);
  padding:15px;
}
.card h3{font-size:13px;margin:0 0 5px}
.card p{font-size:11px;color:var(--muted);margin:0}
.mode-table{width:100%;border-collapse:collapse;margin:15px 0;font-size:12px}
.mode-table th,.mode-table td{padding:10px 11px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
.mode-table th{font-size:10px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted-2);background:var(--surface-2)}
.mode-table td:first-child{font-weight:700;white-space:nowrap}
kbd{
  padding:2px 6px;border:1px solid var(--border-strong,#d3dae4);
  border-bottom-width:2px;border-radius:5px;background:var(--surface-2);
  font-size:10px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
}
.code-note{
  padding:12px;border-radius:10px;background:#0f172a;color:#dbeafe;
  overflow:auto;font-size:11px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
}
.footer{
  border-top:1px solid var(--border);padding:25px 24px;color:var(--muted-2);font-size:10px;
}
.footer-inner{max-width:1120px;margin:auto;display:flex;justify-content:space-between;gap:20px}
.hero-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}
.button{
  display:inline-flex;align-items:center;justify-content:center;
  padding:9px 13px;border-radius:9px;border:1px solid var(--border);
  background:var(--surface);color:var(--text);font-size:11px;font-weight:700;
}
.button:hover{text-decoration:none;border-color:var(--accent);color:var(--accent)}
.button.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.button.primary:hover{background:var(--accent-2);color:#fff}
@media(max-width:800px){
  .layout{grid-template-columns:1fr}
  .toc{display:none}
  .main{padding-top:42px}
}
@media(max-width:560px){
  .header-inner{padding:11px 15px}
  .header-nav a:not(.primary){display:none}
  .main{padding-left:16px;padding-right:16px}
  .card-grid{grid-template-columns:1fr}
  .footer-inner{flex-direction:column}
}