/* Shared header: desktop nav, mobile hamburger, one EN/ES switch. Injected by tools/chrome.mjs.
   Book families only. Anton (--display) for headlines. Inter Tight (--ui) for UI.
   Source Serif 4 (--body) for body text. IBM Plex Mono (--mono) for FIG. captions and labels.
   Do not load Big Shoulders Display or IBM Plex Sans. Do not name Arial in any stack.
   Buttons and inputs inherit or use --ui so the UA button font is never Arial.
   Color tokens: --bg #f2f2ef, --ink #18181a, --text #47464a, --muted #666461 (4.5:1 on --bg), --line #dcdbd5, --line-strong #b9b7af.
   Buy buttons: background --amber #e9b75c, text #18181a, border 1px solid #18181a, hover --amber-hover #d9a548.
   #18181a on #e9b75c is 9.62:1 (WCAG AA). Ochre #94620c (--accent) is text or link color only, never a fill. */
:root{--display:Anton,sans-serif;--ui:"Inter Tight",sans-serif;--body:"Source Serif 4",serif;--mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;--serif:"Source Serif 4",serif;--amber:#e9b75c;--amber-hover:#d9a548;--accent:#94620c}
body{font-family:"Source Serif 4",serif}
button{font-family:"Inter Tight",sans-serif}
input,select,textarea{font-family:inherit}
h1,h2,h3,.word{font-family:Anton,sans-serif}
.sx-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:16px;border-bottom:1px solid var(--line,#dcdbd5);position:relative;z-index:40;min-width:0;max-width:100%;box-sizing:border-box}
.sx-bar .mark{display:flex;align-items:center;gap:10px;min-width:0;overflow:hidden;text-decoration:none;color:inherit;box-sizing:border-box;min-height:44px;padding-block:9px;margin-block:-9px}
.sx-bar .mark b{font:400 26px/1 Anton,sans-serif;letter-spacing:.04em;color:var(--ink,#18181a)}
.sx-bar .mark span{font:500 10.5px/1 "IBM Plex Mono",ui-monospace,Menlo,monospace;letter-spacing:.12em;color:var(--muted,#666461);text-transform:uppercase}
.sx-nav{display:flex;align-items:center;flex-wrap:wrap;gap:4px 16px;min-width:0}
.sx-nav a{font:500 11px/1 "IBM Plex Mono",ui-monospace,Menlo,monospace;letter-spacing:.12em;text-transform:uppercase;color:var(--muted,#666461);text-decoration:none;display:inline-flex;align-items:center;padding:17px 0;min-height:44px;box-sizing:border-box;white-space:nowrap}
@media (min-width:901px){
  .sx-bar{gap:12px}
  .sx-bar .mark span{display:none}
  .sx-nav{flex-wrap:nowrap;gap:0 8px}
  .sx-nav a{letter-spacing:.03em;font-size:10.5px}
}
.sx-nav a:hover,.sx-nav a[aria-current="page"]{color:var(--ink,#18181a)}
a[href^="mailto:"]{display:inline-block;padding-block:14px;box-sizing:border-box}
.sx-nav a.sx-hot{color:var(--accent,#94620c)}
.sx-lang{display:inline-flex;border:1px solid var(--line-strong,#b9b7af);border-radius:999px;overflow:hidden;margin-left:4px}
.sx-lang a,.sx-lang span{font:500 11px/1 "IBM Plex Mono",ui-monospace,Menlo,monospace;letter-spacing:.1em;padding:8px 10px!important;min-height:44px;min-width:44px;box-sizing:border-box;display:inline-flex;align-items:center;justify-content:center;text-decoration:none}
.sx-lang span{background:var(--ink,#18181a);color:var(--bg,#f2f2ef)}
/* Inactive EN/ES link: system ink, never the browser default blue/purple. */
.sx-lang a,.sx-lang a:link,.sx-lang a:visited,.sx-lang a:hover,.sx-lang a:active{color:var(--ink,#18181a)}
.sx-burger{display:none;align-items:center;gap:8px;box-sizing:border-box;background:transparent;border:1px solid var(--line-strong,#b9b7af);border-radius:999px;padding:9px 14px;color:var(--ink,#18181a);font:500 12px/1 "IBM Plex Mono",ui-monospace,Menlo,monospace;letter-spacing:.1em;text-transform:uppercase;cursor:pointer;min-height:44px;min-width:44px}
.sx-burger i{display:block;width:16px;height:2px;background:currentColor;position:relative}
.sx-burger i::before,.sx-burger i::after{content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor}
.sx-burger i::before{top:-5px}.sx-burger i::after{top:5px}
.sx-open .sx-burger i{background:transparent}.sx-open .sx-burger i::before{top:0;transform:rotate(45deg)}.sx-open .sx-burger i::after{top:0;transform:rotate(-45deg)}
.sx-tools{display:flex;align-items:center;gap:8px}
.sx-nav .sx-lang{display:none}
.sx-tools .sx-lang{display:inline-flex}
.vh{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media (max-width:900px){
  .sx-burger{display:inline-flex;min-height:44px;min-width:44px}
  .sx-nav{display:none;position:absolute;top:100%;left:0;right:0;width:auto;max-width:100%;box-sizing:border-box;flex-direction:column;align-items:stretch;gap:0;background:var(--bg,#f2f2ef);border-bottom:1px solid var(--line-strong,#b9b7af);box-shadow:0 18px 30px rgba(0,0,0,.12);padding:6px 16px 14px}
  .sx-open .sx-nav{display:flex}
  .sx-nav a{font-size:14px;padding:15px 2px;border-bottom:1px solid var(--line,#dcdbd5)}
  .sx-nav .sx-lang{display:none}
  .sx-bar .mark span{display:none}
}
/* floating variant for full-screen guides */
.sx-float{position:fixed;top:10px;right:12px;left:auto;z-index:1000;border:1px solid var(--line-strong,#b9b7af);border-radius:14px;padding:6px 10px;background:color-mix(in srgb,var(--bg,#f2f2ef) 92%,transparent);backdrop-filter:blur(6px);gap:12px;font-family:"Inter Tight",sans-serif;--bg:#f2f2ef;--ink:#18181a;--muted:#666461;--line:#dcdbd5;--line-strong:#b9b7af;--accent:#94620c}
/* match the guide's own theme (body[data-theme]); fall back to the device setting */
@media (prefers-color-scheme: dark){body:not([data-theme]) .sx-float{--bg:#131313;--ink:#ecebe6;--muted:#807e78;--line:#262624;--line-strong:#3a3936;--accent:#e9b75c}}
body[data-theme="dark"] .sx-float,html[data-theme="dark"] .sx-float{--bg:#131313;--ink:#ecebe6;--muted:#807e78;--line:#262624;--line-strong:#3a3936;--accent:#e9b75c;color-scheme:dark}
body[data-theme="light"] .sx-float,html[data-theme="light"] .sx-float{--bg:#f2f2ef;--ink:#18181a;--muted:#666461;--line:#dcdbd5;--line-strong:#b9b7af;--accent:#94620c;color-scheme:light}
.sx-float .mark b{font-size:16px}.sx-float .mark span{display:none}
.sx-float .sx-nav{display:none}.sx-float .sx-burger{display:inline-flex;padding:7px 11px;min-height:44px;min-width:44px}.sx-float .sx-tools .sx-lang{display:inline-flex}
html.book body{font-family:"Source Serif 4",serif}
html.book h1,html.book h2,html.book h3{font-family:Anton,sans-serif}
.sx-float.sx-open .sx-nav{display:flex;position:absolute;top:calc(100% + 6px);right:0;left:auto;width:min(280px,calc(100vw - 24px));flex-direction:column;align-items:stretch;gap:0;background:var(--bg);border:1px solid var(--line-strong);border-radius:12px;padding:6px 14px;box-shadow:0 18px 30px rgba(0,0,0,.18)}
.sx-float.sx-open .sx-nav a{font-size:13px;padding:12px 2px;border-bottom:1px solid var(--line)}
.sx-float.sx-open .sx-nav .sx-lang{display:none}
/* Keep the plate title clear of the fixed guide pill (from the r8 guide-card fix). */
.iso-plate-corner[data-corner="title"]{--sx-dodge:min(max(0px,calc(300px - (100vw - min(820px,100vw - 32px)) / 2)),calc(100% - 150px));right:var(--sx-dodge)!important;max-width:calc(100% - 36px - var(--sx-dodge));overflow:hidden;text-overflow:ellipsis}
@media (max-width:720px){
  .iso-plate-corner[data-corner="title"]{left:28px!important}
}
@media (min-width:1024px){
  .iso-page{box-sizing:border-box;padding-right:max(0px,calc(340px - (100vw - min(820px,100vw - 32px)) / 2))}
  .iso-plate-corner[data-corner="title"]{--sx-dodge:0px}
}
.sx-offer{margin:12px 0 0;padding:12px 14px;border:1px solid var(--line-strong,#b9b7af);background:var(--surface,#fbfbfa);color:var(--ink,#18181a);font:15px/1.45 "Inter Tight",sans-serif}
.sx-offer a,.sx-offer button{margin-left:8px;min-height:44px;display:inline-flex;align-items:center;padding:8px 12px;border:1px solid var(--ink,#18181a);background:transparent;color:inherit;font:600 14px/1 "Inter Tight",sans-serif;text-decoration:none;cursor:pointer}
:root{--sx-header:76px}
h1,h2,[id]{scroll-margin-top:var(--sx-header)}
body:has(.sx-float){padding-top:var(--sx-header)}
.iso-plate{display:flex!important;flex-direction:column!important;background:var(--anatomy-card,#fbfbfa);box-shadow:0 0 0 1px var(--anatomy-mid,#8a8a8f)}
.iso-plate-corner[data-corner="title"],.iso-plate-corner[data-corner="hint"]{text-transform:uppercase;letter-spacing:.1em}
.gx-stats{display:grid;grid-template-columns:repeat(var(--gx-n,1),minmax(0,1fr));gap:1px;margin-top:12px;background:var(--om-ring,#0000001a);border:1px solid var(--om-ring,#0000001a)}
.gx-stats div{background:var(--anatomy-card,#fbfbfa);padding:8px 10px;min-width:0}
.gx-stats span{display:block;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--anatomy-stat,#6b6b70)}
.gx-stats b{display:block;margin-top:2px;font:600 15px/1.2 ui-monospace,"SF Mono",Menlo,Consolas,monospace;color:var(--anatomy-stat,#6b6b70);font-variant-numeric:tabular-nums;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.iso-plate-corners{position:static!important;inset:auto!important;display:flex!important;flex-direction:column!important;flex-wrap:nowrap!important;gap:4px!important;order:0!important;width:max-content!important;max-width:100%!important;background:#f2f2ef!important;color:#18181a!important;padding:10px 12px!important;margin:0!important;border:1px solid #dcdbd5!important;pointer-events:none;clear:both}
.iso-plate-corner{position:static!important;top:auto!important;right:auto!important;bottom:auto!important;left:auto!important;max-width:100%!important;white-space:normal!important;color:#18181a!important;opacity:1!important}
.iso[data-theme="light"] .iso-plate-corner,.iso[data-theme="dark"] .iso-plate-corner{color:#18181a!important}
.sx-mach{position:static;z-index:1;display:flex;flex-wrap:nowrap;gap:8px;margin:28px 0 8px;padding:8px;box-sizing:border-box;width:100%;background:#f2f2ef;border:1px solid #b9b7af;font-family:"Inter Tight",sans-serif;--bg:#f2f2ef;--ink:#18181a;--muted:#666461;--line-strong:#b9b7af}
body[data-theme="dark"] .sx-mach{--bg:#131313;--ink:#ecebe6;--muted:#807e78;--line-strong:#3a3936;background:#131313}
body[data-theme="light"] .sx-mach{--bg:#f2f2ef;--ink:#18181a;--muted:#666461;--line-strong:#b9b7af;background:#f2f2ef}
.sx-mach a{flex:1 1 160px;min-height:44px;min-width:44px;display:flex;align-items:center;justify-content:center;padding:8px 12px;text-decoration:none;color:var(--ink);background:var(--bg);border:1px solid var(--line-strong);border-radius:3px;box-sizing:border-box;font:600 14px/1.2 "Inter Tight",sans-serif;text-align:center}
:root{--sx-header:96px}
html{scroll-padding-top:120px}
h1,h2,h3,h4,[id],.og-title,.iso-plate,.vm-line,.vfig,.vm-guide,.vm-controls,.og-steps,figcaption{scroll-margin-top:120px}
.sx-float{top:0!important}
.sx-mach{position:static!important;flex-wrap:wrap!important;clear:both}
.iso-plate-corners{flex-direction:column!important;align-items:flex-start!important;width:max-content!important;max-width:100%!important;background:#f2f2ef!important;color:#18181a!important}
.iso-plate-corner{white-space:normal!important;overflow-wrap:anywhere;opacity:1!important}
/* Home: the round index control sits over the footer's last line.
   Measured control is 44px tall with a 16px viewport offset; 72px clears both. */
footer{padding-bottom:72px}