/* ==========================================================================
   OSSbuy Spreadsheet — spreadsheetossbuy.com
   Engineering blueprint / logistics ledger. Exaggerated-minimalism.
   Type: Sora (display) + IBM Plex Sans (body) + IBM Plex Mono (figures).
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  --paper:#F6F9FF;
  --surface:#FFFFFF;
  --surface-2:#EEF4FF;
  --ink:#0A1633;
  --muted:#41506E;
  --faint:#6C7A99;
  --primary:#036AF1;
  --primary-hover:#0250C5;
  --primary-ink:#0A2E6B;
  --tint:#E8F1FF;
  --line:rgba(3,106,241,.16);
  --line-strong:rgba(3,106,241,.34);
  --hair:#DCE6F7;
  --confirmed:#0F9D6B;
  --confirmed-bg:#E7F7F0;
  --caution:#D64545;
  --caution-bg:#FCEDED;
  --shadow:0 1px 0 rgba(10,22,51,.04), 0 10px 30px -18px rgba(3,106,241,.28);
  --radius:14px;
  --radius-sm:10px;
  --maxw:1180px;
  --font-display:"Sora",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --font-body:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --font-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --nav-h:66px;
}
:root[data-theme="dark"] {
  --paper:#070C18;
  --surface:#0E1730;
  --surface-2:#131E3C;
  --ink:#EAF0FF;
  --muted:#9DB0D6;
  --faint:#7387B0;
  --primary:#4C93FF;
  --primary-hover:#7DB0FF;
  --primary-ink:#CFE1FF;
  --tint:#12224A;
  --line:rgba(120,170,255,.20);
  --line-strong:rgba(120,170,255,.40);
  --hair:#22305A;
  --confirmed:#3FD3A0;
  --confirmed-bg:#0F2A22;
  --caution:#FF7B7B;
  --caution-bg:#301618;
  --shadow:0 1px 0 rgba(0,0,0,.3), 0 14px 34px -20px rgba(0,0,0,.7);
}

/* ---------- Reset / base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--font-body);font-size:17px;line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-hover)}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--ink);line-height:1.08;letter-spacing:-.02em;margin:0 0 .5em;font-weight:800}
p{margin:0 0 1rem}
strong{font-weight:600}
:focus-visible{outline:3px solid var(--primary);outline-offset:2px;border-radius:4px}
.mono{font-family:var(--font-mono)}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}
.skip{position:absolute;left:-999px;top:0;background:var(--primary);color:#fff;padding:10px 16px;z-index:100;border-radius:0 0 8px 0}
.skip:focus{left:0;color:#fff}

/* blueprint grid backdrop utility */
.blueprint{
  background-image:
    linear-gradient(var(--line) 1px,transparent 1px),
    linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:26px 26px;background-position:center;
}

/* ---------- Header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--paper) 88%,transparent);
  backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--hair);
}
.nav{display:flex;align-items:center;gap:18px;height:var(--nav-h)}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:-.03em;color:var(--ink);white-space:nowrap}
.brand:hover{color:var(--ink)}
.brand .mark{width:30px;height:30px;flex:0 0 auto}
.brand .tag{font-family:var(--font-mono);font-size:10px;font-weight:500;color:var(--primary);border:1px solid var(--line-strong);border-radius:5px;padding:2px 6px;letter-spacing:.04em;text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{
  font-family:var(--font-mono);font-size:13.5px;font-weight:500;letter-spacing:.01em;
  color:var(--muted);padding:9px 12px;border-radius:8px;line-height:1;
}
.nav-links a:hover{color:var(--ink);background:var(--surface-2)}
.nav-links a[aria-current="page"]{color:var(--primary);background:var(--tint)}
.nav-tools{display:flex;align-items:center;gap:8px;margin-left:6px}
.icon-btn{width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--hair);background:var(--surface);color:var(--muted);border-radius:10px;cursor:pointer}
.icon-btn:hover{color:var(--primary);border-color:var(--line-strong)}
.icon-btn svg{width:19px;height:19px}
.nav-toggle{display:none}
@media (max-width:960px){
  .nav-links{position:fixed;inset:var(--nav-h) 0 auto 0;flex-direction:column;align-items:stretch;gap:2px;
    background:var(--paper);border-bottom:1px solid var(--hair);padding:12px 22px 20px;margin:0;
    transform:translateY(-140%);transition:transform .28s ease;box-shadow:var(--shadow)}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:13px 12px;font-size:15px}
  .nav-toggle{display:inline-flex;margin-left:auto}
}
@media (prefers-reduced-motion:reduce){.nav-links{transition:none}}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-body);font-weight:600;font-size:15.5px;
  padding:13px 20px;border-radius:11px;border:1px solid transparent;cursor:pointer;line-height:1;min-height:46px;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease}
.btn svg{width:17px;height:17px;flex:0 0 auto}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-hover);border-color:var(--primary-hover);color:#fff}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{background:var(--surface-2);color:var(--primary)}
.btn-block{width:100%;justify-content:center}
@media (prefers-reduced-motion:reduce){.btn:active{transform:none}}

/* ---------- Sections ---------- */
main{display:block}
.section{padding:72px 0}
.section-tight{padding:48px 0}
.eyebrow{font-family:var(--font-mono);font-size:12.5px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--primary);margin:0 0 14px;display:flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--line-strong)}
.section-title{font-size:clamp(1.65rem,3.4vw,2.5rem);max-width:20ch}
.lead{font-size:1.12rem;color:var(--muted);max-width:62ch}
.center{text-align:center}
.center .eyebrow{justify-content:center}
.center .section-title,.center .lead{margin-left:auto;margin-right:auto}

/* ---------- Hero ---------- */
.hero{position:relative;padding:78px 0 60px;overflow:hidden;
  background:
    linear-gradient(var(--line) 1px,transparent 1px) 0 0/26px 26px,
    linear-gradient(90deg,var(--line) 1px,transparent 1px) 0 0/26px 26px,
    radial-gradient(1050px 540px at 86% -14%, var(--tint), transparent 60%),
    linear-gradient(180deg, var(--surface-2), var(--paper) 74%);padding-top:58px;padding-bottom:54px}
.hero .container{position:relative;z-index:2}
.hero-deco{position:absolute;inset:0 0 0 auto;width:min(660px,58%);z-index:1;pointer-events:none;color:var(--primary);opacity:.62;overflow:hidden}
:root[data-theme="dark"] .hero-deco{opacity:.42}
.hero-deco svg{position:absolute;right:-30px;top:0;height:100%;width:auto;min-width:640px}
@media (max-width:900px){.hero-deco{width:100%;opacity:.34}.hero-deco svg{right:-120px}}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero h1{font-size:clamp(1.8rem,3.6vw,3.05rem);font-weight:800;letter-spacing:-.02em;line-height:1.15;margin:0 0 18px}
.hero h1 .hl{color:var(--primary);white-space:nowrap}
.hero .lead{font-size:1.08rem;margin-bottom:24px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-meta{display:flex;gap:22px;flex-wrap:wrap;margin-top:26px;padding-top:22px;border-top:1px dashed var(--line-strong)}
.hero-meta div{display:flex;flex-direction:column;gap:2px}
.hero-meta .n{font-family:var(--font-mono);font-weight:600;font-size:15px;color:var(--ink)}
.hero-meta .l{font-size:12.5px;color:var(--faint)}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr;gap:34px}.hero{padding:52px 0 40px}}

/* ---------- Ledger card (cost breakdown) ---------- */
.ledger{background:var(--surface);border:1px solid var(--hair);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.ledger-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;border-bottom:1px solid var(--hair);background:var(--surface-2)}
.ledger-head .t{font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.ledger-head .chip{font-family:var(--font-mono);font-size:11px;color:var(--primary);border:1px solid var(--line-strong);border-radius:20px;padding:3px 10px}
.ledger-row{display:grid;grid-template-columns:26px 1fr auto;gap:12px;align-items:center;padding:13px 20px;border-bottom:1px solid var(--hair)}
.ledger-row:last-child{border-bottom:0}
.ledger-row .idx{font-family:var(--font-mono);font-size:12px;color:var(--faint)}
.ledger-row .k{font-weight:500;font-size:15px}
.ledger-row .k small{display:block;color:var(--faint);font-weight:400;font-size:12.5px}
.ledger-row .v{font-family:var(--font-mono);font-weight:600;font-size:15px;color:var(--ink);text-align:right;overflow-wrap:anywhere;min-width:0}
.ledger-row.total{background:var(--tint)}
.ledger-row.total .k{font-family:var(--font-display);font-weight:800}
.ledger-row.total .v{color:var(--primary);font-size:17px}
.ledger-note{padding:12px 20px;font-size:12.5px;color:var(--faint);background:var(--surface-2);border-top:1px dashed var(--line-strong)}

/* ---------- Route / custody map ---------- */
.route{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:34px}
.route::before{content:"";position:absolute;left:6%;right:6%;top:26px;height:2px;
  background:repeating-linear-gradient(90deg,var(--line-strong) 0 8px,transparent 8px 16px);z-index:0}
.stop{position:relative;z-index:1;text-align:center}
.stop .dot{width:54px;height:54px;margin:0 auto 14px;border-radius:14px;background:var(--surface);border:1.5px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;color:var(--primary);box-shadow:var(--shadow)}
.stop .dot svg{width:24px;height:24px}
.stop .no{font-family:var(--font-mono);font-size:11px;color:var(--faint);display:block;margin-bottom:3px}
.stop h3{font-size:16px;margin:0 0 6px}
.stop p{font-size:13.5px;color:var(--muted);margin:0}
.stop .who{display:inline-block;margin-top:8px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.04em;text-transform:uppercase;padding:2px 8px;border-radius:20px}
.who-w2c{background:var(--tint);color:var(--primary)}
.who-oss{background:var(--confirmed-bg);color:var(--confirmed)}
@media (max-width:820px){
  .route{grid-template-columns:1fr;gap:0}
  .route::before{left:26px;right:auto;top:6%;bottom:6%;width:2px;height:auto;
    background:repeating-linear-gradient(180deg,var(--line-strong) 0 8px,transparent 8px 16px)}
  .stop{display:grid;grid-template-columns:54px 1fr;gap:16px;text-align:left;padding:14px 0}
  .stop .dot{margin:0}
}

/* ---------- Generic cards / grids ---------- */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--hair);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.card h3{font-size:19px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--muted);margin:0}
.card .ico{width:44px;height:44px;border-radius:11px;background:var(--tint);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card .ico svg{width:22px;height:22px}
.card.num{position:relative}
.card.num .step{position:absolute;top:20px;right:22px;font-family:var(--font-mono);font-weight:700;font-size:13px;color:var(--line-strong)}

/* link card */
.linkcard{display:flex;align-items:center;justify-content:space-between;gap:14px;text-decoration:none}
.linkcard:hover{border-color:var(--line-strong)}
.linkcard .arw{color:var(--primary);flex:0 0 auto;width:22px;height:22px}
/* safety net: any inline icon svg using <use> that isn't otherwise sized */
svg.arw,.related svg,.linkcard svg{width:22px;height:22px}

/* ---------- Category chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:13.5px;font-weight:500;
  padding:10px 14px;border-radius:10px;border:1px solid var(--hair);background:var(--surface);color:var(--ink);min-height:44px}
.chip:hover{border-color:var(--line-strong);color:var(--primary);background:var(--surface-2)}
.chip svg{width:16px;height:16px;color:var(--primary)}
.chip .ext{width:13px;height:13px;color:var(--faint)}

/* ---------- Paste-link / search entry ---------- */
.searchbar{display:flex;gap:8px;background:var(--surface);border:1.5px solid var(--line-strong);border-radius:13px;padding:8px;box-shadow:var(--shadow);flex-wrap:wrap}
.searchbar input{flex:1;min-width:0;border:0;background:transparent;color:var(--ink);font-family:var(--font-body);font-size:16px;padding:10px 12px}
.searchbar input:focus{outline:none}
.searchbar .hint{font-family:var(--font-mono);font-size:11px;color:var(--faint);padding:0 12px 6px;flex-basis:100%}

/* ---------- QC decoder ---------- */
.decoder{border:1px solid var(--hair);border-radius:var(--radius);overflow:hidden;background:var(--surface)}
.decoder-row{display:grid;grid-template-columns:1fr;gap:0;border-bottom:1px solid var(--hair)}
.decoder-row:last-child{border-bottom:0}
.decoder-row .head{padding:16px 20px 6px;font-family:var(--font-display);font-weight:700;font-size:16px;display:flex;align-items:center;gap:10px}
.decoder-row .head svg{width:18px;height:18px;color:var(--primary)}
.decoder-cols{display:grid;grid-template-columns:1fr 1fr;gap:0}
.decoder-cols>div{padding:8px 20px 18px}
.decoder-cols .look{border-right:1px solid var(--hair)}
.decoder-cols h4{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);margin:0 0 8px}
.decoder-cols ul{margin:0;padding-left:18px;font-size:14px;color:var(--muted)}
.decoder-cols ul li{margin-bottom:5px}
@media (max-width:600px){.decoder-cols{grid-template-columns:1fr}.decoder-cols .look{border-right:0;border-bottom:1px solid var(--hair)}}

/* ---------- Estimator ---------- */
.estimator{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
@media (max-width:820px){.estimator{grid-template-columns:1fr}}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px;color:var(--ink)}
.field .row{display:flex;align-items:center;gap:10px;border:1px solid var(--line-strong);border-radius:10px;background:var(--surface);padding:0 12px}
.field .row .cur{font-family:var(--font-mono);color:var(--faint);font-size:14px}
.field input[type="number"]{flex:1;border:0;background:transparent;color:var(--ink);font-family:var(--font-mono);font-size:16px;padding:12px 4px;min-width:0}
.field input:focus{outline:none}
.field .help{font-size:12px;color:var(--faint);margin-top:5px}
.field select{width:100%;border:1px solid var(--line-strong);border-radius:10px;background:var(--surface);color:var(--ink);font-family:var(--font-body);font-size:15px;padding:12px}

/* ---------- Figures (blueprint diagrams, image+text) ---------- */
.figrow{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center}
.figrow.rev{grid-template-columns:.95fr 1.05fr}
.figrow.rev .figure{order:-1}
@media (max-width:820px){.figrow,.figrow.rev{grid-template-columns:1fr;gap:22px}.figrow.rev .figure{order:0}}
.figure{border:1px solid var(--hair);border-radius:var(--radius);background:var(--surface);overflow:hidden;box-shadow:var(--shadow)}
.figure .fig-body{padding:20px;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:22px 22px}
.figure svg{width:100%;height:auto;display:block}
.figure figcaption{padding:11px 18px;font-family:var(--font-mono);font-size:12px;color:var(--faint);border-top:1px dashed var(--line-strong);background:var(--surface-2)}
/* diagram tokens for inline svg (use currentColor + classes) */
.dg-fill{fill:var(--tint)}
.dg-line{stroke:var(--primary);fill:none;stroke-width:2}
.dg-line-2{stroke:var(--line-strong);fill:none;stroke-width:2}
.dg-box{fill:var(--surface);stroke:var(--line-strong);stroke-width:1.5}
.dg-accent{fill:var(--primary)}
.dg-accent-2{fill:var(--confirmed)}
.dg-txt{fill:var(--ink);font-family:var(--font-mono);font-size:12px;font-weight:600}
.dg-sub{fill:var(--faint);font-family:var(--font-mono);font-size:10.5px}
.dg-white{fill:#fff}
:root[data-theme="dark"] .dg-white{fill:#0E1730}

/* ---------- Platforms strip ---------- */
.platforms{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.pf{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:13px;font-weight:500;padding:8px 13px;border-radius:9px;border:1px solid var(--hair);background:var(--surface);color:var(--ink)}
.pf .d{width:9px;height:9px;border-radius:50%;background:var(--primary);flex:0 0 auto}

/* ---------- Destinations grid ---------- */
.dests{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.dest{font-family:var(--font-mono);font-size:12.5px;color:var(--muted);border:1px solid var(--hair);border-radius:7px;padding:6px 11px;background:var(--surface)}
.dest strong{color:var(--primary);font-weight:600}

/* ---------- Callouts ---------- */
.callout{border:1px solid var(--line);border-left:3px solid var(--primary);background:var(--surface-2);border-radius:0 12px 12px 0;padding:16px 20px;margin:22px 0}
.callout.warn{border-left-color:var(--caution);background:var(--caution-bg)}
.callout.ok{border-left-color:var(--confirmed);background:var(--confirmed-bg)}
.callout p{margin:0;font-size:14.5px;color:var(--muted)}
.callout strong{color:var(--ink)}

/* ---------- FAQ accordion ---------- */
.faq{max-width:820px;margin:0 auto}
.qa{border:1px solid var(--hair);border-radius:12px;background:var(--surface);margin-bottom:12px;overflow:hidden}
.qa button{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;
  background:transparent;border:0;cursor:pointer;padding:18px 20px;font-family:var(--font-display);font-weight:700;font-size:16.5px;color:var(--ink);line-height:1.3}
.qa button:hover{color:var(--primary)}
.qa .ic{flex:0 0 auto;width:22px;height:22px;color:var(--primary);transition:transform .2s ease}
.qa[open] .ic,.qa button[aria-expanded="true"] .ic{transform:rotate(45deg)}
.qa .ans{padding:0 20px;max-height:0;overflow:hidden;transition:max-height .26s ease}
.qa .ans-inner{padding:0 0 18px}
.qa .ans p{font-size:14.5px;color:var(--muted);margin:0 0 10px}
@media (prefers-reduced-motion:reduce){.qa .ans,.qa .ic{transition:none}}

/* ---------- Steps list ---------- */
.steps{counter-reset:s;display:grid;gap:14px}
.steps li{list-style:none;display:grid;grid-template-columns:40px 1fr;column-gap:16px;row-gap:3px;align-items:start;
  background:var(--surface);border:1px solid var(--hair);border-radius:12px;padding:18px 20px}
.steps li::before{counter-increment:s;content:counter(s,decimal-leading-zero);font-family:var(--font-mono);font-weight:700;color:var(--primary);font-size:15px;padding-top:2px;grid-column:1;grid-row:1}
.steps li h3{font-size:16.5px;margin:0;grid-column:2}
.steps li p{font-size:14.5px;color:var(--muted);margin:0;grid-column:2}
.steps ol{margin:0;padding:0}

/* ---------- Disclosure / trust strip ---------- */
.disclosure{border:1px dashed var(--line-strong);background:var(--surface-2);border-radius:12px;padding:16px 20px;font-size:13.5px;color:var(--muted)}
.disclosure strong{color:var(--ink)}
.reviewed{font-family:var(--font-mono);font-size:12px;color:var(--faint);margin-top:8px}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(135deg,var(--primary),var(--primary-hover));color:#fff;border-radius:20px;padding:52px 40px;text-align:center;position:relative;overflow:hidden}
.cta-band h2{color:#fff;font-size:clamp(1.8rem,4vw,2.6rem);margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.9);max-width:56ch;margin:0 auto 24px}
.cta-band .btn-primary{background:#fff;color:var(--primary);border-color:#fff}
.cta-band .btn-primary:hover{background:#EAF1FF;color:var(--primary-hover)}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.5)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff}
.cta-band .btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---------- Breadcrumb ---------- */
.crumb{font-family:var(--font-mono);font-size:12.5px;color:var(--faint);padding:20px 0 0}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}

/* ---------- Prose (article pages) ---------- */
.prose{max-width:760px}
.prose h2{font-size:clamp(1.5rem,3vw,2rem);margin-top:44px}
.prose h3{font-size:1.28rem;margin-top:30px}
.prose ul,.prose ol{padding-left:22px;color:var(--muted)}
.prose li{margin-bottom:8px}
.prose .lead{margin-bottom:24px}

/* ---------- Related guides ---------- */
.related{border-top:1px solid var(--hair);margin-top:56px;padding-top:32px}
.related h2{font-size:1.4rem}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--hair);background:var(--surface);margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding:56px 0 40px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand p{font-size:13.5px;color:var(--muted);max-width:38ch}
.footer-col h4{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);margin:0 0 14px}
.footer-col a{display:block;font-size:14px;color:var(--muted);padding:5px 0}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--hair);padding:20px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--faint)}
.footer-bottom .socials{display:flex;gap:8px}
.footer-bottom .socials a{width:34px;height:34px;border:1px solid var(--hair);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--muted)}
.footer-bottom .socials a:hover{color:var(--primary);border-color:var(--line-strong)}
.footer-bottom .socials svg{width:16px;height:16px}
@media (max-width:820px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr}}

/* ---------- Utility ---------- */
.mt0{margin-top:0}.mb0{margin-bottom:0}
.stack>*+*{margin-top:18px}
.tag-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.tag{font-family:var(--font-mono);font-size:11.5px;color:var(--muted);border:1px solid var(--hair);border-radius:6px;padding:4px 9px}
.hr{height:1px;background:var(--hair);border:0;margin:40px 0}
.badge{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:11px;font-weight:500;padding:4px 10px;border-radius:20px}
.badge.ok{background:var(--confirmed-bg);color:var(--confirmed)}
.badge.info{background:var(--tint);color:var(--primary)}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}