/* ══════════════════════════════════════════════════════════════════════════
   Shared stylesheet for every page that is not the landing page or the
   checkout — the guides hub, the guides themselves, and the 404.

   The landing page keeps its own inline <style> on purpose: it is the page
   that has to paint fastest, and inlining spares it a round trip. Everything
   else is a second-or-later pageview, by which point this file is cached, so
   one shared stylesheet is the cheaper trade.

   Tokens are copied verbatim from index.html. If a token changes there, it
   has to change here too — the two files are the same identity.
   ══════════════════════════════════════════════════════════════════════════ */

:root{
  --ground:#08120F;
  --surface:#0D1D19;
  --surface-2:#0B1815;
  --raise:#0E211C;
  --line:#1B372F;
  --line-soft:#142923;
  --ink:#E9F4F0;
  --ink-2:#9DB5AE;
  --muted:#6E8A83;
  --dim:#4F6B64;
  --accent:#2DD4BF;
  --amber:#F5A524;
  --pad:40px;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}

html{scroll-behavior:smooth;}
body{
  background:var(--ground);
  color:var(--ink);
  font-family:"Archivo",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
::selection{background:rgba(45,212,191,.28);color:#fff;}
a{color:inherit;text-decoration:none;}
ul,ol{list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;}
.mono{font-family:"IBM Plex Mono",ui-monospace,SFMono-Regular,monospace;}

/* ══ NAV ═══════════════════════════════════════════════════════════════ */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(8,18,15,.86);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-in{
  max-width:1180px;margin:0 auto;padding:14px var(--pad);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px;letter-spacing:-.025em;}
.brand i{width:9px;height:9px;border-radius:50%;background:var(--accent);display:block;flex:0 0 auto;}
.nav-links{display:flex;gap:28px;font-size:13.5px;color:var(--ink-2);}
.nav-links a{transition:color .16s;}
.nav-links a:hover,.nav-links a[aria-current]{color:var(--ink);}

/* ══ BUTTONS ═══════════════════════════════════════════════════════════ */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:14px 24px;border-radius:10px;
  background:var(--accent);color:#062621;
  font-family:inherit;font-weight:800;font-size:14.5px;letter-spacing:-.012em;
  border:none;cursor:pointer;
  transition:transform .18s cubic-bezier(.2,.8,.3,1),box-shadow .18s;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 30px -10px rgba(45,212,191,.55);}
.btn:active{transform:translateY(0);}
.btn svg{width:16px;height:16px;flex:0 0 auto;}
.btn-sm{padding:9px 16px;font-size:13px;border-radius:8px;}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--accent);box-shadow:none;}

/* ══ ARTICLE SHELL ═════════════════════════════════════════════════════ */
.wrap{max-width:1180px;margin:0 auto;padding:0 var(--pad);}
.doc{
  max-width:1180px;margin:0 auto;padding:44px var(--pad) 0;
  display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:60px;align-items:start;
}
article{max-width:none;min-width:0;}

.crumbs{
  font-family:"IBM Plex Mono",monospace;font-size:11px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--muted);
  display:flex;gap:9px;flex-wrap:wrap;align-items:center;margin-bottom:24px;
}
.crumbs a:hover{color:var(--accent);}
.crumbs span[aria-hidden]{color:var(--dim);}

article h1{
  font-size:clamp(31px,4.4vw,48px);font-weight:800;
  letter-spacing:-.038em;line-height:1.06;
  margin-bottom:18px;text-wrap:balance;
}
.standfirst{font-size:17.5px;color:var(--ink-2);line-height:1.62;max-width:64ch;}
.byline{
  font-family:"IBM Plex Mono",monospace;font-size:11.5px;color:var(--dim);
  margin-top:22px;padding-top:18px;border-top:1px solid var(--line-soft);
  display:flex;gap:18px;flex-wrap:wrap;
}

article h2{
  font-size:clamp(22px,2.8vw,28px);font-weight:800;letter-spacing:-.03em;
  line-height:1.18;margin:56px 0 14px;text-wrap:balance;scroll-margin-top:80px;
}
article h3{
  font-size:18px;font-weight:800;letter-spacing:-.022em;
  margin:34px 0 10px;scroll-margin-top:80px;
}
article p{font-size:15.5px;color:var(--ink-2);line-height:1.72;margin-bottom:16px;max-width:70ch;}
article p strong,article li strong{color:var(--ink);font-weight:600;}
article a:not(.btn){color:var(--accent);border-bottom:1px solid rgba(45,212,191,.32);}
article a:not(.btn):hover{border-bottom-color:var(--accent);}

article ul.bullets,article ol.numbers{margin:0 0 20px;max-width:70ch;display:grid;gap:10px;}
article ul.bullets li{
  position:relative;padding-left:22px;font-size:15.5px;color:var(--ink-2);line-height:1.68;
}
article ul.bullets li::before{
  content:"";position:absolute;left:2px;top:10px;
  width:6px;height:6px;border-radius:50%;background:var(--accent);
}
article ol.numbers{counter-reset:n;}
article ol.numbers li{
  position:relative;padding-left:32px;font-size:15.5px;color:var(--ink-2);line-height:1.68;
  counter-increment:n;
}
article ol.numbers li::before{
  content:counter(n,decimal-leading-zero);
  position:absolute;left:0;top:1px;
  font-family:"IBM Plex Mono",monospace;font-size:12px;color:var(--accent);
}

code{
  font-family:"IBM Plex Mono",monospace;font-size:.88em;
  background:rgba(45,212,191,.09);border:1px solid var(--line-soft);
  padding:1px 6px;border-radius:5px;color:#9FEDE3;
}
pre{
  background:var(--surface-2);border:1px solid var(--line);border-radius:11px;
  padding:18px 20px;overflow-x:auto;margin:0 0 20px;
}
pre code{background:none;border:none;padding:0;font-size:12.8px;line-height:1.75;color:var(--ink-2);}

/* ══ COMPONENTS ════════════════════════════════════════════════════════ */
.note{
  border:1px solid var(--line);border-left:3px solid var(--accent);
  background:var(--surface-2);border-radius:0 11px 11px 0;
  padding:18px 22px;margin:0 0 22px;max-width:70ch;
}
.note p{margin:0;font-size:14.5px;}
.note p + p{margin-top:10px;}
.note.warn{border-left-color:var(--amber);}

.steps{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:13px;overflow:hidden;margin:0 0 24px;}
.steps li{background:var(--surface-2);padding:22px 24px;}
.steps .n{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.1em;color:var(--accent);display:block;margin-bottom:9px;}
.steps h3{margin:0 0 7px;font-size:16.5px;}
.steps p{margin:0;font-size:14.5px;max-width:66ch;}

.tbl-wrap{overflow-x:auto;margin:0 0 24px;border:1px solid var(--line);border-radius:13px;}
table{border-collapse:collapse;width:100%;min-width:520px;background:var(--surface-2);}
th,td{padding:13px 18px;text-align:left;font-size:14px;border-bottom:1px solid var(--line-soft);vertical-align:top;}
th{
  font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--muted);font-weight:400;background:var(--surface);
}
td{color:var(--ink-2);line-height:1.6;}
td:first-child{color:var(--ink);font-weight:600;}
tr:last-child td{border-bottom:none;}
.yes{color:var(--accent);}
.no{color:var(--dim);}

.faq{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:13px;overflow:hidden;margin:0 0 24px;}
details{background:var(--surface-2);}
summary{
  padding:17px 22px;font-size:15px;font-weight:600;letter-spacing:-.015em;
  cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:20px;transition:color .16s;
}
summary .q{flex:1 1 auto;}
summary::-webkit-details-marker{display:none;}
summary:hover{color:var(--accent);}
summary::after{content:"+";color:var(--accent);font-size:19px;font-weight:400;flex:0 0 auto;line-height:1;}
details[open] summary::after{content:"\2212";}
details p{padding:0 22px 18px;margin:0;font-size:14.5px;line-height:1.7;}
details p + p{padding-top:0;margin-top:-6px;}

/* inline CTA card */
.cta{
  border:1px solid var(--line);border-radius:14px;
  background:linear-gradient(100deg,var(--raise),var(--surface-2));
  padding:30px 32px;margin:44px 0 8px;
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
}
.cta h2{margin:0 0 7px;font-size:21px;letter-spacing:-.028em;}
.cta p{margin:0;font-size:14px;max-width:44ch;}

/* ══ TOC RAIL ══════════════════════════════════════════════════════════ */
.rail{position:sticky;top:78px;display:grid;gap:26px;}
.rail-h{
  font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--muted);margin-bottom:12px;
}
.toc{display:grid;gap:8px;}
.toc a{font-size:13px;color:var(--ink-2);line-height:1.45;border-left:1px solid var(--line);padding-left:12px;transition:color .16s,border-color .16s;}
.toc a:hover{color:var(--accent);border-left-color:var(--accent);}
.rail-card{border:1px solid var(--line);border-radius:12px;background:var(--surface-2);padding:18px;}
.rail-card p{font-size:12.5px;color:var(--ink-2);line-height:1.6;margin-bottom:14px;}
.rail-card .btn{width:100%;justify-content:center;padding:11px 14px;font-size:13px;}

/* ══ GUIDE CARDS (hub + related) ═══════════════════════════════════════ */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:13px;overflow:hidden;margin:0 0 24px;}
/* auto-fit fills a row before wrapping, so a 4-card set lands 3 + 1 and the
   leftover half-row shows through as a bare slab of --line. Any grid with a
   card count that does not divide by 3 wants this instead. */
.card-grid--2{grid-template-columns:repeat(2,1fr);}
@media (max-width:700px){.card-grid--2{grid-template-columns:1fr;}}
.card{background:var(--surface-2);padding:26px 24px;transition:background .18s;display:block;}
.card:hover{background:var(--surface);}
.card .k{font-family:"IBM Plex Mono",monospace;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:11px;}
.card h2,.card h3{font-size:17px;font-weight:800;letter-spacing:-.025em;margin:0 0 8px;}
.card p{font-size:13.5px;color:var(--ink-2);line-height:1.6;margin:0;max-width:none;}

.sec-label{
  font-family:"IBM Plex Mono",monospace;font-size:11px;
  letter-spacing:.17em;text-transform:uppercase;color:var(--muted);
  margin:56px 0 22px;display:flex;align-items:center;gap:14px;
}
.sec-label::after{content:"";flex:1;height:1px;background:var(--line);}

/* ══ FOOTER ════════════════════════════════════════════════════════════ */
footer{margin-top:88px;border-top:1px solid var(--line);padding:32px 0 56px;}
.foot-in{
  max-width:1180px;margin:0 auto;padding:0 var(--pad);
  display:flex;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.foot-links{display:flex;gap:22px;font-size:13px;color:var(--ink-2);flex-wrap:wrap;}
.foot-links a:hover{color:var(--accent);}
.disclaimer{font-size:11.5px;color:var(--dim);line-height:1.7;max-width:62ch;margin-top:22px;}

/* ══ RESPONSIVE ════════════════════════════════════════════════════════ */
@media (max-width:940px){
  :root{--pad:24px;}
  .doc{grid-template-columns:1fr;gap:0;padding-top:32px;}
  .rail{position:static;margin-top:52px;}
  .rail-card .btn{width:auto;}
  .nav-links{display:none;}
}
@media (max-width:520px){
  .cta{padding:24px 22px;}
  .cta .btn{width:100%;justify-content:center;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}