/* Shared styles for guide pages. The tester (/) keeps its CSS inline for a single-request load. */
:root{
  --bg:#f7f7f5;--surface:#fff;--surface-2:#f2f2ef;--border:#e5e5e0;--border-strong:#d2d2cb;
  --text:#17171a;--muted:#55555d;--faint:#9a9aa3;--accent:#2f5bff;--accent-hover:#1f47e0;--accent-soft:#e8eeff;
  --ok:#137a3a;--ok-bg:#dcf5e5;--bad:#c02121;--bad-bg:#fde4e4;--warn:#9a5b00;--warn-bg:#fdf0d5;
  --code-bg:#f4f4f1;--shadow:0 1px 2px rgba(20,20,30,.04),0 8px 24px rgba(20,20,30,.05);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --bg:#0d0d10;--surface:#16161a;--surface-2:#1d1d22;--border:#27272e;--border-strong:#34343c;
  --text:#ececf0;--muted:#a3a3ad;--faint:#6b6b75;--accent:#5b7cff;--accent-hover:#7390ff;--accent-soft:#1b2345;
  --ok:#4ade80;--ok-bg:#12301f;--bad:#f87171;--bad-bg:#3a1618;--warn:#fbbf24;--warn-bg:#35280b;
  --code-bg:#121216;--shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);color-scheme:dark;
}}
:root[data-theme=dark]{
  --bg:#0d0d10;--surface:#16161a;--surface-2:#1d1d22;--border:#27272e;--border-strong:#34343c;
  --text:#ececf0;--muted:#a3a3ad;--faint:#6b6b75;--accent:#5b7cff;--accent-hover:#7390ff;--accent-soft:#1b2345;
  --ok:#4ade80;--ok-bg:#12301f;--bad:#f87171;--bad-bg:#3a1618;--warn:#fbbf24;--warn-bg:#35280b;
  --code-bg:#121216;--shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
code,pre{font-family:var(--mono);font-size:.86em}
:not(pre)>code{background:var(--code-bg);border:1px solid var(--border);padding:.08em .38em;border-radius:5px;overflow-wrap:anywhere}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

/* Header / footer (matches the tester) */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 85%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--border)}
.top .wrap{display:flex;align-items:center;gap:16px;height:56px}
.brand{display:flex;align-items:center;gap:9px;color:var(--text);letter-spacing:-.01em;font-size:16px}
.brand:hover{text-decoration:none}
.brand svg{width:24px;height:24px;flex:none}
.brand b{font-weight:650}.brand span{color:var(--faint);font-weight:500}
.top nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.top nav a{color:var(--muted);font-size:14px;padding:6px 10px;border-radius:8px}
.top nav a:hover,.top nav a[aria-current]{color:var(--text);background:var(--surface-2);text-decoration:none}
.icon-btn{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:8px;border:0;background:none;color:var(--muted)}
.icon-btn:hover{background:var(--surface-2);color:var(--text)}
.icon-btn svg{width:18px;height:18px}
footer{border-top:1px solid var(--border);padding:24px 0 40px;color:var(--faint);font-size:13px;margin-top:64px}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between}
footer a{color:var(--muted)}

/* Article layout */
.crumbs{font-size:13.5px;color:var(--faint);padding:28px 0 0}
.crumbs a{color:var(--muted)}
.article-head{max-width:780px;padding:14px 0 28px}
.article-head h1{font-size:clamp(30px,4.6vw,44px);line-height:1.12;letter-spacing:-.025em;margin:0 0 14px;font-weight:720}
.lede{font-size:19px;color:var(--muted);margin:0 0 16px}
.meta{font-size:13.5px;color:var(--faint)}
.article-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:56px;align-items:start}
.toc{position:sticky;top:80px;font-size:13.5px;border-left:1px solid var(--border);padding-left:16px}
.toc b{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--faint);margin-bottom:8px}
.toc a{display:block;color:var(--muted);padding:3px 0;line-height:1.4}
.toc a:hover{color:var(--text);text-decoration:none}
@media (max-width:980px){.article-grid{grid-template-columns:1fr}.toc{display:none}}

.prose{max-width:760px;min-width:0}
.prose h2{font-size:26px;line-height:1.25;letter-spacing:-.02em;margin:48px 0 12px;scroll-margin-top:80px}
.prose h3{font-size:19px;line-height:1.3;margin:32px 0 8px;scroll-margin-top:80px}
.prose p,.prose li{color:var(--muted)}
.prose strong{color:var(--text);font-weight:620}
.prose ul,.prose ol{padding-left:22px}
.prose li{margin:6px 0}
.prose li::marker{color:var(--faint)}
.prose img{max-width:100%;height:auto;border-radius:10px}
.prose hr{border:0;border-top:1px solid var(--border);margin:40px 0}
.prose pre{position:relative;background:var(--code-bg);border:1px solid var(--border);border-radius:10px;padding:14px 16px;overflow:auto;line-height:1.6;margin:16px 0;color:var(--text)}
.prose pre .copy{position:absolute;top:8px;right:8px;height:26px;padding:0 9px;font-size:12px;border-radius:7px;border:1px solid var(--border-strong);background:var(--surface);color:var(--muted);font-family:var(--sans);opacity:0;transition:opacity .15s}
.prose pre:hover .copy,.prose pre .copy:focus{opacity:1}
@media (hover:none){.prose pre .copy{opacity:1}}
.prose table{width:100%;border-collapse:collapse;font-size:14.5px;margin:16px 0;display:block;overflow-x:auto}
.prose th,.prose td{text-align:left;vertical-align:top;padding:9px 12px;border-bottom:1px solid var(--border)}
.prose th{color:var(--text);font-weight:600;background:var(--surface-2)}
.prose td{color:var(--muted)}

/* Callouts */
.tldr,.callout{border-radius:12px;padding:16px 18px;margin:20px 0;border:1px solid var(--border);background:var(--surface)}
.tldr{border-left:4px solid var(--accent)}
.tldr>b,.callout>b{display:block;color:var(--text);margin-bottom:4px}
.tldr p,.callout p{margin:6px 0 0}
.tldr ul,.tldr ol{margin:8px 0 0}
.callout.warn{background:var(--warn-bg);border-color:transparent}
.callout.warn>b{color:var(--warn)}
.callout.ok{background:var(--ok-bg);border-color:transparent}
.callout.ok>b{color:var(--ok)}

/* CTA: posts to the tester */
.cta{margin:32px 0;padding:20px;border-radius:14px;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 25%,transparent)}
.cta b{display:block;font-size:17px;margin-bottom:4px}
.cta p{margin:0 0 12px;font-size:14.5px;color:var(--muted)}
.cta .bar{display:flex;gap:8px;background:var(--surface);border:1px solid var(--border-strong);border-radius:11px;padding:5px}
.cta input{flex:1;min-width:0;border:0;background:none;outline:none;padding:0 10px;height:40px;font-size:15px}
.cta button{border:0;border-radius:8px;background:var(--accent);color:#fff;font-weight:600;padding:0 18px;font-size:14.5px}
.cta button:hover{background:var(--accent-hover)}
@media (max-width:520px){.cta .bar{flex-direction:column}.cta button{height:40px}}

/* FAQ */
.faq details{border-bottom:1px solid var(--border);padding:14px 0}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px;color:var(--text)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--faint);font-weight:400;font-size:20px;line-height:1}
.faq details[open] summary::after{content:"\2212"}
.faq details p{margin:8px 0 0}

/* Related + blog index cards */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;margin:16px 0}
.cards a{display:block;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px;color:var(--text);box-shadow:var(--shadow);transition:border-color .15s,transform .15s}
.cards a:hover{text-decoration:none;border-color:var(--accent);transform:translateY(-1px)}
.cards b{display:block;font-size:16px;line-height:1.35;margin-bottom:6px;letter-spacing:-.01em}
.cards span{display:block;font-size:14px;color:var(--muted);line-height:1.5}
.cards small{display:block;margin-top:10px;font-size:12.5px;color:var(--faint)}
.blog-head{padding:40px 0 12px;max-width:760px}
.blog-head h1{font-size:clamp(30px,4.4vw,42px);letter-spacing:-.025em;line-height:1.12;margin:0 0 12px}
.blog-head p{color:var(--muted);font-size:18px;margin:0}
.cards.big{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px;margin-top:28px}
.cards.big a{padding:22px}
.cards.big b{font-size:19px}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:var(--text);color:var(--bg);padding:8px 14px;border-radius:9px;font-size:13.5px;opacity:0;pointer-events:none;transition:.2s;z-index:50}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media (max-width:600px){.wrap{padding:0 16px}.top nav a.hide-sm{display:none}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}