/* Shared styles for build-guide.html and safety.html */
:root{
  --paper:#e9edf0; --surface:#ffffff; --ink:#18222d; --muted:#55616e; --line:#d3dae1; --line-soft:#e3e8ec;
  --blue:#1f5fad; --blue-soft:#e3ecf7; --caution:#f2b705; --stripe:#18222d; --danger:#c8302a; --code:#eef2f5;
  --sans:"Barlow",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --cond:"Barlow Semi Condensed","Barlow",system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --bar:56px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#12171d; --surface:#1a2129; --ink:#e6ebf0; --muted:#98a4b0; --line:#2c3743; --line-soft:#232c36;
    --blue:#7fb0f0; --blue-soft:#1d2b3d; --stripe:#12171d; --danger:#f0695f; --code:#222b35; color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#12171d; --surface:#1a2129; --ink:#e6ebf0; --muted:#98a4b0; --line:#2c3743; --line-soft:#232c36;
  --blue:#7fb0f0; --blue-soft:#1d2b3d; --stripe:#12171d; --danger:#f0695f; --code:#222b35; color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-padding-top:calc(var(--bar) + 16px);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.62 var(--sans);font-variant-numeric:tabular-nums}

/* Top bar */
.top{position:sticky;top:0;z-index:10;height:var(--bar);display:flex;align-items:center;gap:24px;padding:0 24px;
  background:color-mix(in srgb,var(--paper) 86%,transparent);backdrop-filter:blur(12px) saturate(1.2);-webkit-backdrop-filter:blur(12px) saturate(1.2);
  border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font:700 18px/1 var(--cond);letter-spacing:-.005em;white-space:nowrap}
.brand svg{flex:none}
.top nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.top nav::-webkit-scrollbar{display:none}
.top nav a{position:relative;color:var(--muted);text-decoration:none;font:600 15px/1 var(--sans);padding:10px 12px;border-radius:8px;white-space:nowrap}
.top nav a:hover{color:var(--ink);background:var(--line-soft)}
.top nav a[aria-current="page"]{color:var(--ink)}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;padding:0;border:0;border-radius:8px;background:transparent;color:var(--muted);cursor:pointer;flex:none;margin-right:-8px}
.theme-toggle:hover{color:var(--ink);background:var(--line-soft)}
.top nav a[aria-current="page"]::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:3px;border-radius:2px;background:var(--caution)}

/* Layout */
.layout{max-width:1240px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:minmax(0,1fr);gap:56px}
main{min-width:0;max-width:760px;padding:48px 0 120px}
@media (min-width:1080px){.layout{grid-template-columns:280px minmax(0,1fr)}}

/* Sidebar contents */
.toc{display:none}
@media (min-width:1080px){
  .toc{display:block;position:sticky;top:var(--bar);align-self:start;max-height:calc(100vh - var(--bar));overflow-y:auto;padding:48px 4px 32px 0;scrollbar-width:thin}
}
.toc h2{font:700 14px/1.2 var(--cond);color:var(--muted);margin:0 0 12px 12px;padding:0;border:0}
.toc ol{list-style:none;margin:0;padding:0;counter-reset:none}
.toc li{margin:0;max-width:none}
.toc a{display:grid;grid-template-columns:2.2em 1fr;gap:2px;padding:5px 10px;border-radius:6px;color:var(--muted);text-decoration:none;font-size:14.5px;line-height:1.35}
.toc a .n{font:600 14px/1.35 var(--cond);color:var(--muted);opacity:.75}
.toc a:hover{color:var(--ink);background:var(--line-soft)}
.toc a.active{color:var(--ink);background:var(--surface);box-shadow:inset 3px 0 0 var(--blue)}
.toc a.active .n{color:var(--blue);opacity:1}

/* Title block */
main>h1:first-child{font:700 clamp(36px,5.2vw,56px)/1.02 var(--cond);letter-spacing:-.02em;margin:0 0 24px;text-wrap:balance}
main>h1:first-child+p{font-size:19px;line-height:1.55;color:var(--muted)}
main>h1:first-child+p strong{color:var(--ink)}

/* Headings */
h2,h3,h4{font-family:var(--cond);letter-spacing:-.01em;text-wrap:balance}
h2{font-size:32px;line-height:1.1;font-weight:700;margin:88px 0 20px;padding-top:28px;border-top:2px solid var(--ink)}
h2 .num{display:block;font-size:15px;line-height:1;color:var(--blue);margin-bottom:10px;letter-spacing:0}
h3{font-size:23px;line-height:1.2;font-weight:700;margin:48px 0 12px}
h4{font-size:19px;line-height:1.25;font-weight:600;margin:32px 0 8px}
p,li{max-width:70ch}
p{margin:0 0 16px}
ul,ol{padding-left:1.4em;margin:0 0 18px}
li{margin:4px 0}
li::marker{color:var(--muted)}
strong{font-weight:600}
a{color:var(--blue);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:3px}
hr{border:0;border-top:1px solid var(--line);margin:40px 0}
hr:has(+h2){display:none}

/* In-page Contents list, hidden on wide screens where the sidebar shows it */
@media (min-width:1080px){main h2#contents,main h2#contents+ol{display:none}}
main h2#contents+ol{columns:2 260px;column-gap:32px;padding-left:1.6em}
main h2#contents+ol li{break-inside:avoid}

/* Callouts: caution-stripe edge */
blockquote{position:relative;margin:28px 0;padding:18px 22px 18px 34px;background:var(--surface);border:1px solid var(--line);border-radius:4px 10px 10px 4px;overflow:hidden}
blockquote::before{content:"";position:absolute;left:0;top:0;bottom:0;width:12px;
  background:repeating-linear-gradient(-45deg,var(--caution) 0 8px,var(--stripe) 8px 16px)}
blockquote p{margin:0 0 10px}
blockquote p:last-child{margin-bottom:0}

/* Tables */
table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;margin:24px 0;font-size:15px;line-height:1.45;background:var(--surface);border:1px solid var(--line);border-radius:10px}
th,td{padding:9px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line-soft)}
th{font:600 14.5px/1.3 var(--cond);color:var(--muted);background:var(--code);border-bottom:1px solid var(--line);white-space:nowrap}
tr:last-child td{border-bottom:0}
td+td,th+th{border-left:1px solid var(--line-soft)}

/* Code and diagrams */
code{font-family:var(--mono);font-size:.86em;background:var(--code);padding:2px 6px;border-radius:5px}
pre{background:var(--code);padding:16px 18px;border-radius:10px;overflow-x:auto;font-size:14px;line-height:1.5;margin:20px 0}
pre code{background:none;padding:0;font-size:inherit}
pre.mermaid{background:var(--surface);border:1px solid var(--line);text-align:center;font-family:var(--sans)}

ul.task,li input{margin-right:6px}

@media (max-width:640px){
  body{font-size:16.5px}
  .top{padding:0 16px;gap:8px}
  .brand{display:none}
  .top nav{margin-left:-8px}
  .top nav a{padding:10px 6px;font-size:14.5px}
  .top nav .long{display:none}
  .top nav a[aria-current="page"]::after{left:6px;right:6px}
  .layout{padding:0 16px}
  main{padding-top:32px}
  h2{font-size:27px;margin-top:64px}
  blockquote{padding:16px 16px 16px 28px}
  blockquote::before{width:9px}
}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
@media print{
  .top,.toc{display:none}
  .layout{display:block}
  body{background:#fff;color:#000}
  main h2#contents,main h2#contents+ol{display:block}
}