:root {
  --bg: #ffffff; --bg2: #f6f8fa; --card: #ffffff; --ink: #1f2328; --ink2: #59636e; --muted: #818b98;
  --border: #d0d7de; --accent: #2a78d6; --accent2: #7b4fd6; --code: #f6f8fa;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1117; --bg2: #121a2a; --card: #151b23; --ink: #f0f6fc; --ink2: #9198a1; --muted: #768390;
          --border: #3d444d; --accent: #3987e5; --accent2: #9d7ce8; --code: #151b23; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); line-height: 1.6;
       font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
header.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent);
             backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--ink); }
.brand img { width: 30px; height: 30px; }
nav a { color: var(--ink2); margin-left: 22px; font-weight: 500; font-size: 15px; }
.hero { padding: 64px 0 24px; text-align: center; }
.hero h1 { font-size: clamp(34px, 5.6vw, 58px); line-height: 1.08; letter-spacing: -1.5px; margin: 0 0 18px; }
.hero h1 .grad { background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text;
                 background-clip: text; color: transparent; }
.hero p.lead { font-size: clamp(17px, 2.2vw, 21px); color: var(--ink2); max-width: 760px; margin: 0 auto 30px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 18px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 10px; font-weight: 700;
       font-size: 16px; border: 1px solid var(--border); color: var(--ink); background: var(--card); }
.btn.primary { background: linear-gradient(90deg, var(--accent), var(--accent2)); color: #fff; border: 0; }
.btn:hover { text-decoration: none; filter: brightness(1.05); }
.install { display: inline-block; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 14.5px;
           background: var(--code); border: 1px solid var(--border); border-radius: 8px; padding: 8px 14px; color: var(--ink2);
           max-width: 100%; overflow-wrap: anywhere; }
figure { margin: 34px 0; }
figure img, picture img { width: 100%; height: auto; display: block; }
section { padding: 38px 0; border-top: 1px solid var(--border); }
section h2 { font-size: 30px; letter-spacing: -0.5px; margin: 0 0 14px; }
section p.sub { color: var(--ink2); margin: 0 0 22px; font-size: 17px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--ink2); font-size: 15.5px; }
pre { background: var(--code); border: 1px solid var(--border); border-radius: 10px; padding: 16px; overflow-x: auto;
      font-size: 14px; line-height: 1.55; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
.table-scroll { overflow-x: auto; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--ink2); font-weight: 600; }
.faq h3 { font-size: 18px; margin: 22px 0 6px; }
.faq p { margin: 0; color: var(--ink2); }
footer { border-top: 1px solid var(--border); padding: 30px 0 50px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
@media (max-width: 640px) { nav a.opt { display: none; } }
/* guide pages */
.doc { max-width: 820px; }
.doc h1 { font-size: clamp(30px, 4.6vw, 44px); line-height: 1.12; letter-spacing: -1px; margin: 40px 0 12px; }
.doc h2 { font-size: 25px; letter-spacing: -0.3px; margin: 38px 0 10px; }
.doc p, .doc li { font-size: 17px; }
.doc p.lead { color: var(--ink2); font-size: 19px; }
.doc td, .doc th { font-size: 14.5px; vertical-align: top; }
.crumbs { font-size: 14px; color: var(--muted); margin-top: 26px; }
.note { background: var(--bg2); border: 1px solid var(--border); border-radius: 10px; padding: 12px 16px; }
p code, li code, .doc td { overflow-wrap: anywhere; }
.doc td:first-child { min-width: 9em; }