/* The Bitcoin World — built on the Global Digital Treasury brand tokens (BRAND_TOKENS.json, Sep 2026).
   Layout concept: a calm institutional desk — white paper, olive ink, gold used only as a hairline accent. */
:root{
  --bg:#FFFFFF; --panel:#F6F7F3; --line:#D8DDD1; --sage:#DDE3D3; --palegold:#E8DDBF;
  --ink:#252A23; --muted:#60665B; --olive:#556448; --olive-deep:#45523A; --gold:#B39A58;
  --serif:"Newsreader", Georgia, "Times New Roman", serif;
  --sans:"Instrument Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --wrap:1180px; --read:680px; --r:6px;
  color-scheme: light;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6}
img{max-width:100%}
a{color:var(--olive);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--olive-deep)}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
h1,h2,h3{font-family:var(--serif);font-weight:500;color:var(--ink);text-wrap:balance;line-height:1.15;margin:0}
h1{font-size:clamp(2.1rem,4.6vw,3.5rem);letter-spacing:-.015em}
h2{font-size:clamp(1.55rem,2.8vw,2.15rem);letter-spacing:-.01em}
h3{font-size:1.25rem}
p{margin:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding-left:max(20px, env(safe-area-inset-left,0px));padding-right:max(20px, env(safe-area-inset-right,0px))}
.eyebrow{font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);font-weight:600}
.lede{font-size:1.15rem;color:var(--muted);max-width:62ch}
.btn{display:inline-flex;align-items:center;gap:.5em;padding:.8em 1.3em;border-radius:var(--r);font-weight:600;font-size:.95rem;text-decoration:none;border:1px solid var(--olive);transition:background .15s,color .15s}
.btn-primary{background:var(--olive);color:#fff}
.btn-primary:hover{background:var(--olive-deep);color:#fff}
.btn-ghost{background:transparent;color:var(--olive)}
.btn-ghost:hover{background:var(--panel)}
.btns{display:flex;flex-wrap:wrap;gap:12px}

/* header */
.site-head{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;background:rgba(255,255,255,.96);backdrop-filter:saturate(1.2) blur(6px);border-bottom:1px solid var(--line)}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:#fff}
.head-in{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand svg{flex:none}
.brand-name{font-family:var(--serif);font-size:1.28rem;font-weight:500;letter-spacing:-.01em;line-height:1}
.brand-sub{display:block;font-family:var(--sans);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-top:4px}
.nav{display:flex;align-items:center;gap:26px}
.nav a{color:var(--ink);text-decoration:none;font-size:.93rem;font-weight:500}
.nav a:hover,.nav a[aria-current="page"]{color:var(--olive)}
.nav .btn{color:#fff;padding:.6em 1.05em}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:var(--r);padding:8px 12px;font:inherit;font-size:.9rem;color:var(--ink);cursor:pointer}
@media (max-width:920px){
  .menu-btn{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:0;padding:8px max(20px, env(safe-area-inset-left,0px)) 18px}
  .nav.open{display:flex}
  .nav a{padding:10px 0;width:100%}
  .nav .btn{width:auto;margin-top:8px}
}

/* sections */
.sec{padding-block:clamp(56px,8vw,96px)}
.sec + .sec{border-top:1px solid var(--line)}
.sec-panel{background:var(--panel)}
.sec-head{display:grid;gap:14px;max-width:760px;margin-bottom:40px}

/* hero */
.hero{padding-block:clamp(48px,7vw,88px) clamp(48px,6vw,72px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:56px;align-items:center}
.hero-copy{display:grid;gap:22px}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr;gap:40px}}

/* RFQ ticket — the hero's subject detail */
.ticket{border:1px solid var(--line);border-radius:10px;background:#fff;font-size:.9rem;overflow:hidden}
.ticket-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line);background:var(--panel)}
.ticket-head strong{font-family:var(--serif);font-size:1.15rem;font-weight:500}
.ticket-meta{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-bottom:1px solid var(--line)}
.ticket-meta div{padding:12px 18px;display:grid;gap:2px}
.ticket-meta div + div{border-left:1px solid var(--line)}
.ticket-meta span{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.ticket-meta b{font-weight:600;font-variant-numeric:tabular-nums}
.quotes{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
.quotes th{font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:600;text-align:left;padding:10px 18px}
.quotes td{padding:11px 18px;border-top:1px solid var(--line)}
.quotes td:last-child,.quotes th:last-child{text-align:right}
.quotes tr.best td{background:#F3F0E4}
.quotes tr.best td:first-child{font-weight:600}
.pill{display:inline-block;font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;font-weight:700;padding:2px 8px;border-radius:99px;background:var(--olive);color:#fff;margin-left:8px;vertical-align:1px}
.ticket-foot{padding:12px 18px;color:var(--muted);font-size:.78rem;border-top:1px solid var(--line)}

/* trust strip */
.strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.strip ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr))}
.strip li{padding:18px 20px;font-size:.92rem;font-weight:500;display:flex;gap:10px;align-items:center}
.strip li + li{border-left:1px solid var(--line)}
.strip li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--gold);flex:none}
@media (max-width:820px){.strip ul{grid-template-columns:repeat(2,minmax(0,1fr))}.strip li:nth-child(3){border-left:0}.strip li:nth-child(n+3){border-top:1px solid var(--line)}}
@media (max-width:460px){.strip ul{grid-template-columns:1fr}.strip li + li{border-left:0;border-top:1px solid var(--line)}}

/* grids */
.grid{display:grid;gap:28px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:980px){.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.item{display:grid;gap:10px;align-content:start;min-width:0}
.item h3{font-size:1.2rem}
.item p{color:var(--muted)}
.card{border:1px solid var(--line);border-radius:var(--r);padding:26px;background:#fff}
.card-link{text-decoration:none;color:inherit;display:grid;gap:10px;align-content:start;transition:border-color .15s}
.card-link:hover{border-color:var(--olive)}
.card-link .more{color:var(--olive);font-weight:600;font-size:.9rem;margin-top:4px}
.problem{border-top:1px solid var(--ink);padding-top:18px}

/* steps — a real sequence */
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:28px;counter-reset:s}
.steps li{counter-increment:s;display:grid;gap:10px;align-content:start;min-width:0}
.steps li::before{content:"Step " counter(s);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:var(--gold);border-bottom:1px solid var(--line);padding-bottom:10px}
.steps h3{font-size:1.15rem}
.steps p{color:var(--muted);font-size:.95rem}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}

.list-clean{list-style:none;padding:0;margin:0;display:grid}
.list-clean li{padding:16px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:minmax(0,220px) minmax(0,1fr);gap:20px}
.list-clean li:last-child{border-bottom:1px solid var(--line)}
.list-clean b{font-weight:600}
.list-clean span{color:var(--muted)}
@media (max-width:640px){.list-clean li{grid-template-columns:1fr;gap:4px}}

.cta-band{background:var(--olive);color:#fff}
.cta-band .wrap{display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap;padding-block:56px}
.cta-band h2{color:#fff}
.cta-band p{color:#E4E8DD;margin-top:10px;max-width:56ch}
.cta-band .btn{background:#fff;color:var(--olive);border-color:#fff}
.cta-band .btn:hover{background:var(--palegold);color:var(--olive-deep)}

/* page header */
.page-head{padding-block:clamp(44px,6vw,72px) 36px;border-bottom:1px solid var(--line)}
.page-head .wrap{display:grid;gap:16px}
.crumbs{font-size:.85rem;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--olive)}
.crumbs span[aria-hidden]{color:var(--line)}

/* prose */
.prose{max-width:var(--read);min-width:0}
.prose > * + *{margin-top:1.05em}
.prose h2{margin-top:2em;font-size:1.65rem;scroll-margin-top:96px}
.prose h3{margin-top:1.6em;scroll-margin-top:96px}
.prose ul,.prose ol{padding-left:1.25em}
.prose li + li{margin-top:.4em}
.prose blockquote{margin:1.6em 0;padding:18px 22px;background:#F7F4EA;border:1px solid var(--palegold);border-radius:var(--r);color:var(--ink)}
.prose blockquote::before{content:"Treasurer's note";display:block;font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;font-weight:700;color:#7d6a35;margin-bottom:6px}
.prose blockquote p{margin:0}
.prose table{border-collapse:collapse;width:100%;font-size:.93rem;font-variant-numeric:tabular-nums}
.prose th{text-align:left;font-weight:600;background:var(--panel)}
.prose th,.prose td{border:1px solid var(--line);padding:9px 12px;vertical-align:top}
.table-scroll{overflow-x:auto;max-width:100%}
.prose strong{font-weight:600}

/* article layout */
.article-grid{display:grid;grid-template-columns:220px minmax(0,1fr);gap:56px;padding-block:44px 72px}
.toc{position:sticky;top:96px;align-self:start;font-size:.88rem;display:grid;gap:8px}
.toc b{font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.toc a{color:var(--muted);text-decoration:none;line-height:1.35}
.toc a:hover{color:var(--olive)}
@media (max-width:960px){.article-grid{grid-template-columns:1fr;gap:28px}.toc{position:static;border:1px solid var(--line);border-radius:var(--r);padding:18px}}
.meta{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:.9rem}
.takeaways{border:1px solid var(--line);border-radius:var(--r);background:var(--panel);padding:20px 24px;margin-bottom:32px;max-width:var(--read)}
.takeaways b{font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--olive)}
.takeaways ul{margin:10px 0 0;padding-left:1.2em}
.takeaways li + li{margin-top:6px}
.next{margin-top:56px;display:grid;gap:18px}
.helpbox{margin-top:48px;border:1px solid var(--olive);border-radius:var(--r);padding:24px;display:grid;gap:12px}

/* learn hub */
.cat-block{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:40px;padding-block:36px;border-top:1px solid var(--line)}
.cat-block ul{list-style:none;margin:0;padding:0;columns:2;column-gap:32px}
.cat-block li{break-inside:avoid;padding:7px 0}
.cat-block li a{text-decoration:none;color:var(--ink)}
.cat-block li a:hover{color:var(--olive);text-decoration:underline}
@media (max-width:820px){.cat-block{grid-template-columns:1fr;gap:16px}.cat-block ul{columns:1}}
.count{font-size:.85rem;color:var(--muted)}

/* glossary */
.az{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.az a{display:inline-grid;place-items:center;width:34px;height:34px;border:1px solid var(--line);border-radius:4px;text-decoration:none;font-weight:600;font-size:.9rem;color:var(--ink)}
.az a:hover{border-color:var(--olive);color:var(--olive)}
.gl-letter{font-family:var(--serif);font-size:2rem;color:var(--gold);padding-top:28px;scroll-margin-top:90px}
.gl dl{margin:0}
.gl dt{font-weight:600;font-size:1.05rem;margin-top:22px;scroll-margin-top:90px}
.gl dd{margin:6px 0 0;color:var(--ink);max-width:72ch}
.gl dd .see{display:block;margin-top:6px;font-size:.9rem}
.search{width:100%;max-width:420px;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r);font:inherit;background:#fff;color:var(--ink)}

/* tool */
.tool{display:grid;grid-template-columns:minmax(0,360px) minmax(0,1fr);gap:40px;align-items:start}
@media (max-width:900px){.tool{grid-template-columns:1fr}}
.field{display:grid;gap:6px;margin-bottom:18px}
.field label{font-weight:600;font-size:.9rem}
.field input{padding:11px 12px;border:1px solid var(--line);border-radius:var(--r);font:inherit;font-variant-numeric:tabular-nums;background:#fff;color:var(--ink)}
.field small{color:var(--muted)}
.res{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
.res th,.res td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:right}
.res th:first-child,.res td:first-child{text-align:left}
.res th{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.bar{height:8px;background:var(--sage);border-radius:4px;overflow:hidden;min-width:80px}
.bar i{display:block;height:100%;background:var(--olive)}
.state{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:2px 8px;border-radius:99px}
.ok{background:#E3EADB;color:#3E4D33}.warn{background:#F2E8CC;color:#6E5A22}.bad{background:#F1DCD6;color:#7A2E1E}

/* footer */
.site-foot{border-top:1px solid var(--line);background:var(--panel);font-size:.9rem;color:var(--muted)}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(2,minmax(0,1fr));gap:36px;padding-block:56px 36px}
.foot-grid h4{font-family:var(--sans);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink);margin:0 0 12px}
.foot-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.foot-grid a{color:var(--muted);text-decoration:none}
.foot-grid a:hover{color:var(--olive)}
.legal{border-top:1px solid var(--line);padding-block:24px 36px;display:grid;gap:10px;font-size:.82rem;line-height:1.55}
@media (max-width:820px){.foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:460px){.foot-grid{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{.site-head,.toc,.cta-band,.site-foot .foot-grid{display:none}body{font-size:12pt}}
.brand img{width:48px;height:48px;flex:none;border-radius:8px}
@media (max-width:480px){.brand-sub{display:none}.brand img{width:42px;height:42px}}

/* landing page additions */
.start{border:1px solid var(--line);border-radius:10px;background:#fff;overflow:hidden}
.start-head{display:flex;align-items:center;gap:12px;padding:16px 20px;background:var(--olive);color:#fff}
.start-head img{width:40px;height:40px;border-radius:6px}
.start-head strong{font-family:var(--serif);font-weight:500;font-size:1.15rem;color:#fff}
.start-head span{display:block;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:#E4E8DD}
.start ol{list-style:none;margin:0;padding:0;counter-reset:a}
.start li{border-top:1px solid var(--line)}
.start li:first-child{border-top:0}
.start li a{display:grid;grid-template-columns:28px minmax(0,1fr);gap:10px;padding:14px 20px;text-decoration:none;color:var(--ink);counter-increment:a}
.start li a::before{content:counter(a);font-family:var(--serif);color:var(--gold);font-size:1.15rem;line-height:1.3}
.start li a:hover{background:var(--panel)}
.start li small{display:block;color:var(--muted);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;margin-bottom:2px}
.start-foot{padding:14px 20px;border-top:1px solid var(--line);font-weight:600;font-size:.92rem}
.cats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
@media (max-width:980px){.cats{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.cats{grid-template-columns:1fr}}
.cats .card-link h3{font-size:1.15rem}
.cats .count{margin-top:auto}
.who{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:56px;align-items:start}
@media (max-width:900px){.who{grid-template-columns:1fr;gap:36px}}
.who .prose{max-width:none}
.founder{border:1px solid var(--line);border-radius:10px;padding:26px;display:grid;gap:12px;background:var(--panel)}
.founder h3{font-size:1.35rem}
.founder .role{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:600}
[id]{scroll-margin-top:90px}
.founder-photo{width:100%;height:auto;aspect-ratio:4/5;object-fit:cover;border-radius:6px;display:block}