/* FTH Trading sites: shared visual system (FTH identity v2).
   Source of truth: sites/shared/assets/fth.css. build-docs.mjs copies it into
   sites/trader/assets/ and sites/docs/assets/ so each site works on its own, from file:// too. */

@font-face{font-family:Inter;src:url(fonts/inter-latin-300-normal.woff2) format("woff2");font-weight:300;font-display:swap}
@font-face{font-family:Inter;src:url(fonts/inter-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:Inter;src:url(fonts/inter-latin-500-normal.woff2) format("woff2");font-weight:500;font-display:swap}
@font-face{font-family:Inter;src:url(fonts/inter-latin-600-normal.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:Inter;src:url(fonts/inter-latin-800-normal.woff2) format("woff2");font-weight:800;font-display:swap}

/* ---- tokens: light by default ---- */
:root{
  --navy-700:#1E2A45;--navy-800:#111D3D;--navy-900:#0B1530;--navy-950:#060B19;
  --plat-100:#EEF2F7;--plat-300:#C9D3E0;--plat-500:#A3B1C6;--plat-700:#6E7C93;--plat-900:#3E4A5E;
  --steel-300:#9DB4D9;--steel-700:#2A4A7F;
  --font:Inter,'Suisse Intl','Neue Haas Grotesk Text','Helvetica Neue',Arial,sans-serif;
  --mono:ui-monospace,'Cascadia Code','JetBrains Mono',Consolas,monospace;
  --r-sm:6px;--r-md:10px;--r-lg:16px;--r-xl:24px;--pill:999px;
  --ease:cubic-bezier(.22,1,.36,1);
  --metal:linear-gradient(135deg,#2A4A7F 0%,#3E4A5E 45%,#6E7C93 75%,#2A4A7F 100%);

  color-scheme:light;
  --bg:#FFFFFF;--surface:#F4F6F9;--surface-2:#E9EDF3;
  --ink:#060B19;--ink-muted:#3A4660;--ink-subtle:#56627A;--accent:#2A4A7F;
  --line:#E1E6ED;--line-strong:#C9D3E0;--btn-bg:#060B19;--btn-ink:#FFFFFF;--focus:#2A4A7F;
  --glass:rgba(255,255,255,.42);--glass-strong:rgba(255,255,255,.7);
  --glass-edge:rgba(6,11,25,.10);--glass-hi:rgba(255,255,255,.95);
  --blob-a:#C9D3E0;--blob-b:#9DB4D9;--blob-c:#A3B1C6;
  --logo-dark:none;--logo-light:block;
  --amber:#7A5A12;--amber-edge:rgba(122,90,18,.45);
  --code-s:#3E4A5E;
}
/* ---- dark: system preference unless the reader picked light ---- */
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --metal:linear-gradient(135deg,#EEF2F7 0%,#A3B1C6 42%,#6E7C93 70%,#C9D3E0 100%);
    --bg:#060B19;--surface:#0B1530;--surface-2:#111D3D;
    --ink:#FFFFFF;--ink-muted:#A3B1C6;--ink-subtle:#8E9CB3;--accent:#9DB4D9;
    --line:#1C2847;--line-strong:#34446A;--btn-bg:#EEF2F7;--btn-ink:#060B19;--focus:#9DB4D9;
    --glass:rgba(17,29,61,.38);--glass-strong:rgba(17,29,61,.62);
    --glass-edge:rgba(238,242,247,.16);--glass-hi:rgba(238,242,247,.55);
    --blob-a:#A3B1C6;--blob-b:#2A4A7F;--blob-c:#9DB4D9;
    --logo-dark:block;--logo-light:none;
    --amber:#E8C98B;--amber-edge:rgba(232,201,139,.45);
    --code-s:#C9D3E0;
  }
}
/* ---- dark: picked by the reader ---- */
:root[data-theme="dark"]{
  color-scheme:dark;
  --metal:linear-gradient(135deg,#EEF2F7 0%,#A3B1C6 42%,#6E7C93 70%,#C9D3E0 100%);
  --bg:#060B19;--surface:#0B1530;--surface-2:#111D3D;
  --ink:#FFFFFF;--ink-muted:#A3B1C6;--ink-subtle:#8E9CB3;--accent:#9DB4D9;
  --line:#1C2847;--line-strong:#34446A;--btn-bg:#EEF2F7;--btn-ink:#060B19;--focus:#9DB4D9;
  --glass:rgba(17,29,61,.38);--glass-strong:rgba(17,29,61,.62);
  --glass-edge:rgba(238,242,247,.16);--glass-hi:rgba(238,242,247,.55);
  --blob-a:#A3B1C6;--blob-b:#2A4A7F;--blob-c:#9DB4D9;
  --logo-dark:block;--logo-light:none;
  --amber:#E8C98B;--amber-edge:rgba(232,201,139,.45);
  --code-s:#C9D3E0;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:1.0625rem;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit}
p a,li a,td a{color:var(--accent);text-underline-offset:3px}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:4px}
img{max-width:100%}
.wrap{width:min(1200px,100% - 32px);margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;left:16px;top:-60px;z-index:50;background:var(--btn-bg);color:var(--btn-ink);padding:10px 16px;border-radius:var(--pill);text-decoration:none;font-weight:600}
.skip:focus{top:12px}
code,.mono{font-family:var(--mono);font-size:.86em;overflow-wrap:anywhere}
p code,li code,td code{background:var(--glass-edge);padding:2px 6px;border-radius:5px}
p code,li code{white-space:nowrap}
p code.long,li code.long{white-space:normal}

/* ---- backdrop ---- */
#liquid{position:fixed;inset:0;z-index:0;pointer-events:none;filter:blur(60px) saturate(1.2);opacity:.85}
.grain{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(var(--line-strong) 1px,transparent 1px);background-size:22px 22px;
  mask-image:radial-gradient(ellipse at 50% 30%,#000 0%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse at 50% 30%,#000 0%,transparent 75%)}
main,header,footer{position:relative;z-index:1}

/* ---- glass ---- */
.glass{
  position:relative;background:linear-gradient(160deg,var(--glass-strong),var(--glass));
  border:1px solid var(--glass-edge);border-radius:var(--r-xl);
  backdrop-filter:blur(22px) saturate(1.6);-webkit-backdrop-filter:blur(22px) saturate(1.6);
  box-shadow:inset 0 1px 0 var(--glass-hi),inset 0 -1px 0 rgba(0,0,0,.18),0 30px 80px -24px rgba(6,11,25,.45);
  isolation:isolate;overflow:hidden
}
.glass::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;pointer-events:none;
  background:linear-gradient(135deg,var(--glass-hi),transparent 35%,transparent 65%,var(--glass-edge));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}
.glass::after{content:"";position:absolute;inset:-1px;border-radius:inherit;pointer-events:none;z-index:-1;
  background:radial-gradient(420px circle at var(--mx,30%) var(--my,0%),rgba(238,242,247,.16),transparent 60%)}
.tilt{transform-style:preserve-3d;transition:transform .5s var(--ease)}

/* ---- nav ---- */
.nav{position:sticky;top:12px;z-index:20;margin:12px auto 0;width:min(1200px,100% - 32px);border-radius:var(--pill);padding:8px 10px 8px 18px;display:flex;align-items:center;gap:12px;overflow:visible}
.brand{display:flex;align-items:center;text-decoration:none;flex:none}
.brand img{height:34px;width:auto}
.logo-dark{display:var(--logo-dark)}.logo-light{display:var(--logo-light)}
.nav>nav{flex:1;display:flex;justify-content:center;min-width:0}
.nav ul{list-style:none;margin:0 auto;padding:0;display:flex;gap:2px}
.nav a.link{font:500 .92rem var(--font);color:var(--ink-muted);padding:8px 14px;border-radius:var(--pill);text-decoration:none;display:inline-flex;gap:6px;align-items:center}
.nav a.link:hover{color:var(--ink);background:var(--glass-edge)}
.nav a.link[aria-current="page"]{color:var(--ink);background:var(--glass-edge)}
.ext{width:13px;height:13px;flex:none;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;opacity:.8}
.nav-actions{display:flex;gap:8px;align-items:center;flex:none}
.btn{font:600 .9rem var(--font);display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--pill);border:1px solid transparent;text-decoration:none;cursor:pointer;transition:transform .2s var(--ease)}
.btn-primary{background:var(--btn-bg);color:var(--btn-ink);box-shadow:inset 0 1px 0 rgba(255,255,255,.6),0 10px 30px -10px rgba(157,180,217,.6)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-ghost{background:var(--glass);color:var(--ink);border-color:var(--glass-edge);backdrop-filter:blur(12px)}
.btn-ghost:hover{border-color:var(--line-strong)}
.icon-btn{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:var(--glass);border:1px solid var(--glass-edge);color:var(--ink);cursor:pointer;padding:0}
.burger{display:none}
.m-only{display:none}

/* ---- type ---- */
.eyebrow{font:600 .75rem var(--font);letter-spacing:.22em;text-transform:uppercase;color:var(--accent)}
h1,h2,h3{letter-spacing:-.025em;line-height:1.08;margin:0}
h1{font-size:clamp(2.3rem,6.4vw,4.6rem);font-weight:600}
h2{font-size:clamp(1.8rem,4.2vw,3rem);font-weight:600}
h3{font-size:1.15rem;font-weight:600;letter-spacing:-.01em}
.metal-text{background:var(--metal);-webkit-background-clip:text;background-clip:text;color:transparent}
.muted{color:var(--ink-muted)}
.lede{font-size:1.2rem;color:var(--ink-muted);max-width:680px;margin:0}

/* ---- status labels ---- */
.tag{display:inline-flex;align-items:center;gap:6px;font:600 .68rem var(--font);letter-spacing:.14em;text-transform:uppercase;padding:4px 10px;border-radius:var(--pill);border:1px solid var(--line-strong);color:var(--ink-muted);white-space:nowrap;width:max-content;max-width:100%}
.tag::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}
.tag.real{color:var(--ink);border-color:var(--accent)}
.tag.real::before{background:var(--accent)}
.tag.testnet,.tag.build{color:var(--amber);border-color:var(--amber-edge)}
.tag.sim{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 45%,transparent)}
.tag.planned{color:var(--ink-subtle)}
.tag.proposed{color:var(--ink-subtle);border-style:dashed}
.tag.ref{color:var(--ink-subtle);border-color:var(--line)}
.tag.ref::before{display:none}
.legend{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center;font-size:.86rem;color:var(--ink-muted)}
.legend span.item{display:inline-flex;gap:8px;align-items:center}

/* ---- sections ---- */
section{padding:clamp(56px,9vw,110px) 0}
.sec-head{display:flex;flex-direction:column;gap:14px;margin-bottom:36px;max-width:780px}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}.g4{grid-template-columns:repeat(4,minmax(0,1fr))}.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.card{padding:26px;display:flex;flex-direction:column;gap:12px;min-height:100%}
.card p{margin:0;color:var(--ink-muted);font-size:.97rem}
.card .top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;flex-wrap:wrap}
.card ul{margin:0;padding-left:18px;color:var(--ink-muted);font-size:.95rem}
.ico{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(145deg,var(--glass-hi),transparent);border:1px solid var(--glass-edge);color:var(--ink);flex:none}
.ico svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.prose{max-width:780px}
.prose p,.prose li{color:var(--ink-muted)}
.panel{padding:clamp(22px,4vw,40px)}
.note{border-left:2px solid var(--accent);padding:12px 16px;background:var(--glass);border-radius:0 var(--r-md) var(--r-md) 0;font-size:.95rem;color:var(--ink-muted);margin:18px 0}
.note.warn{border-left-color:var(--amber)}

/* ---- hero ---- */
.hero{padding-top:clamp(48px,8vw,100px);padding-bottom:56px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero-copy{display:flex;flex-direction:column;gap:24px;min-width:0}
.page-hero{padding-top:clamp(48px,7vw,90px);padding-bottom:24px}
.page-hero .sec-head{margin-bottom:0}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.orb-stage{perspective:1100px;display:grid;place-items:center;min-height:420px}
.orb{width:min(400px,78vw);aspect-ratio:1;border-radius:50%;display:grid;place-items:center;position:relative}
.orb .mark{width:52%;filter:drop-shadow(0 30px 40px rgba(0,0,0,.45));transform:translateZ(60px)}
.orb .ring{position:absolute;inset:-6%;border-radius:50%;border:1px solid var(--glass-edge);transform:rotateX(70deg) translateZ(-20px)}
.orb .ring.r2{inset:-14%;transform:rotateX(70deg) rotateZ(30deg);opacity:.6}
.status-strip{margin-top:44px;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-radius:var(--r-lg)}
.status-strip div{padding:18px 20px;border-right:1px solid var(--glass-edge);display:flex;flex-direction:column;gap:8px;min-width:0}
.status-strip div:last-child{border-right:0}
.status-strip span.k{font-size:.8rem;color:var(--ink-subtle)}
.status-strip strong{font-weight:600;font-size:.98rem}

/* ---- diagram ---- */
.diagram{padding:24px}
.diagram svg{width:100%;height:auto;display:block}
.diagram text{font-family:var(--font)}
.flow-dash{stroke-dasharray:6 8;animation:dash 1.6s linear infinite}
@keyframes dash{to{stroke-dashoffset:-28}}

/* ---- code ---- */
.code{padding:0;font-family:var(--mono);font-size:.86rem;border-radius:var(--r-lg)}
.code header{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;padding:12px 18px;border-bottom:1px solid var(--glass-edge);font-family:var(--font);font-size:.8rem;color:var(--ink-subtle);position:static}
.code pre{margin:0;padding:18px 20px;overflow:auto;line-height:1.65;white-space:pre}
.k{color:var(--accent)}.s{color:var(--code-s)}.c{color:var(--ink-subtle);font-style:italic}.f{color:var(--ink)}

/* ---- table ---- */
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.tbl{width:100%;border-collapse:collapse;font-size:.94rem}
.tbl th,.tbl td{text-align:left;padding:13px 16px;border-bottom:1px solid var(--glass-edge);vertical-align:top}
.tbl th{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-subtle);font-weight:600}
.tbl tr:last-child td{border-bottom:0}
.tbl td:first-child{font-weight:600}
.tbl td.muted{font-weight:400}
.tbl code{font-size:.82rem}

/* ---- CTA ---- */
.cta-band{padding:clamp(36px,6vw,72px);text-align:center;display:flex;flex-direction:column;align-items:center;gap:20px}

/* ---- footer ---- */
footer.site{border-top:1px solid var(--line);padding:56px 0 40px;margin-top:40px}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,minmax(0,1fr));gap:32px}
.foot-grid h2{margin:0 0 12px;font-size:.75rem;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-subtle);font-weight:600}
.foot-grid ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.foot-grid a{text-decoration:none;color:var(--ink-muted);font-size:.93rem;display:inline-flex;gap:6px;align-items:center}
.foot-grid a:hover{color:var(--ink)}
.perimeter{margin-top:40px;padding-top:24px;border-top:1px solid var(--line);font-size:.8rem;color:var(--ink-subtle);display:flex;flex-direction:column;gap:10px;max-width:980px}
.perimeter p{margin:0}

/* ---- docs ---- */
.docs-shell{display:grid;grid-template-columns:270px minmax(0,1fr) 200px;gap:24px;align-items:start;padding-top:28px}
.side{position:sticky;top:96px;max-height:calc(100vh - 116px);overflow-y:auto;overflow-x:hidden;padding:18px;border-radius:var(--r-lg)}
.side h2{margin:16px 0 6px;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-subtle);font-weight:600}
.side h2:first-child{margin-top:0}
.side h3{margin:10px 0 4px 8px;font-size:.74rem;color:var(--accent);font-weight:600;letter-spacing:0}
.side ul{list-style:none;margin:0;padding:0}
.side a{display:flex;justify-content:space-between;gap:8px;padding:6px 10px;border-radius:8px;text-decoration:none;font-size:.9rem;color:var(--ink-muted)}
.side a:hover{color:var(--ink);background:var(--glass-edge)}
.side a[aria-current="page"]{color:var(--ink);background:var(--glass-strong);box-shadow:inset 2px 0 0 var(--accent)}
.side details summary{cursor:pointer;font-weight:600;font-size:.9rem;padding:6px 0;display:none}
.doc{padding:clamp(22px,4vw,48px);min-height:70vh;min-width:0}
.doc .crumb{font-size:.8rem;color:var(--ink-subtle);margin-bottom:14px}
.doc h1{font-size:clamp(1.9rem,4vw,2.8rem);margin:12px 0 16px}
.doc h2{font-size:1.35rem;margin:34px 0 10px;letter-spacing:-.015em;scroll-margin-top:100px}
.doc p,.doc li{color:var(--ink-muted)}
.doc ul{padding-left:20px}
.doc .lede{font-size:1.1rem}
.doc .code{margin:14px 0}
.doc .tbl-wrap{margin:14px 0;border:1px solid var(--glass-edge);border-radius:var(--r-md)}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:48px}
.pager a{flex:1;padding:16px;border-radius:var(--r-md);border:1px solid var(--glass-edge);text-decoration:none;font-size:.92rem;min-width:0}
.pager a small{display:block;color:var(--ink-subtle);font-size:.75rem}
.pager a.next{text-align:right}
.toc{position:sticky;top:96px;font-size:.85rem}
.toc h2{margin:0 0 8px;font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-subtle)}
.toc a{display:block;padding:4px 0;color:var(--ink-muted);text-decoration:none}
.toc a:hover{color:var(--ink)}
.doc-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:20px}
.doc-cards a{display:flex;flex-direction:column;gap:8px;padding:18px;border-radius:var(--r-lg);border:1px solid var(--glass-edge);text-decoration:none;background:var(--glass)}
.doc-cards a:hover{border-color:var(--line-strong)}
.doc-cards strong{font-size:1rem}
.doc-cards span.d{font-size:.9rem;color:var(--ink-muted)}

/* ---- responsive ---- */
@media (max-width:1080px){.docs-shell{grid-template-columns:240px minmax(0,1fr)}.toc{display:none}}
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr}.orb-stage{min-height:300px;order:-1;overflow:hidden}
  .g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .status-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .status-strip div{border-right:0;border-bottom:1px solid var(--glass-edge)}
  .status-strip div:last-child{border-bottom:0}
  .foot-grid{grid-template-columns:1fr 1fr}
  .nav ul{display:none;position:absolute;top:calc(100% + 8px);left:0;right:0;flex-direction:column;padding:10px;border-radius:var(--r-lg);background:var(--glass-strong);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);border:1px solid var(--glass-edge)}
  :root .nav ul{background:var(--bg)}
  .nav ul.open{display:flex}
  .burger{display:grid}
  .nav ul .m-only{display:list-item}
  .nav-actions .btn-ghost{display:none}
  .docs-shell{grid-template-columns:minmax(0,1fr)}
  .side{position:static;max-height:none}
  .side details summary{display:list-item}
}
@media (max-width:600px){
  .g3,.g4,.g2,.doc-cards{grid-template-columns:minmax(0,1fr)}
  .foot-grid{grid-template-columns:1fr}
  .nav{padding-left:12px}
  .brand img{height:28px}
  .pager{flex-direction:column}
  .card{padding:20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}