/* SI Key — layout concept: a brass key tag on a lab-notebook page.
   One brass object, a graph-paper ground, spec sheets set like stamped equipment labels. */

/* @fonts-start (self-hosted; the Claude preview swaps these for Google Fonts) */
@font-face{font-family:"Big Shoulders Display";font-style:normal;font-weight:800;font-display:swap;src:url("fonts/big-shoulders-display-800.woff2") format("woff2")}
@font-face{font-family:"Instrument Sans";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/instrument-sans-400.woff2") format("woff2")}
@font-face{font-family:"Instrument Sans";font-style:normal;font-weight:500;font-display:swap;src:url("fonts/instrument-sans-500.woff2") format("woff2")}
@font-face{font-family:"Instrument Sans";font-style:normal;font-weight:600;font-display:swap;src:url("fonts/instrument-sans-600.woff2") format("woff2")}
@font-face{font-family:"Martian Mono";font-style:normal;font-weight:400;font-display:swap;src:url("fonts/martian-mono-400.woff2") format("woff2")}
@font-face{font-family:"Martian Mono";font-style:normal;font-weight:500;font-display:swap;src:url("fonts/martian-mono-500.woff2") format("woff2")}
/* @fonts-end */

:root{
  /* color: paper, ink, brass, verdigris */
  --bg:#EFF2EE;
  --surface:#F7F8F5;
  --raised:#FFFFFF;
  --ink:#131A1D;
  --muted:#53605C;
  --line:#D0D8D3;
  --brass:#835F17;
  --brass-fill:#D5A547;
  --on-brass:#1B1406;
  --verdigris:#22675A;
  --tint:rgba(34,103,90,.09);
  --grid:rgba(34,103,90,.07);
  --warn:#983823;
  --shadow:rgba(19,26,29,.20);
  --qr-paper:#FFFFFF;
  --qr-muted:#56625E;
  /* type */
  --f-display:"Big Shoulders Display","Arial Narrow","Roboto Condensed",sans-serif;
  --f-body:"Instrument Sans",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-mono:"Martian Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --radius:6px;
  --wrap:1140px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0D1316;--surface:#131B1F;--raised:#18232A;--ink:#E4E9E4;--muted:#97A39F;--line:#27353C;
    --brass:#E2B75C;--brass-fill:#D5A547;--on-brass:#1B1406;--verdigris:#76D0BB;
    --tint:rgba(118,208,187,.10);--grid:rgba(118,208,187,.045);--warn:#EC8E73;--shadow:rgba(0,0,0,.5);
    --qr-paper:#FFFFFF;--qr-muted:#56625E;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0D1316;--surface:#131B1F;--raised:#18232A;--ink:#E4E9E4;--muted:#97A39F;--line:#27353C;
  --brass:#E2B75C;--brass-fill:#D5A547;--on-brass:#1B1406;--verdigris:#76D0BB;
  --tint:rgba(118,208,187,.10);--grid:rgba(118,208,187,.045);--warn:#EC8E73;--shadow:rgba(0,0,0,.5);
  --qr-paper:#FFFFFF;--qr-muted:#56625E;
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding-inline:clamp(16px,4vw,40px);
  background-color:var(--bg);
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:28px 28px;
  color:var(--ink);
  font-family:var(--f-body);
  font-size:17px;
  line-height:1.6;
}
img,svg{max-width:100%}
a{color:var(--verdigris);text-underline-offset:3px}
code{font-family:var(--f-mono)}
h1,h2,h3{text-wrap:balance}
p{text-wrap:pretty}
:focus-visible{outline:2px solid var(--verdigris);outline-offset:3px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--raised);color:var(--ink);padding:8px 12px;border-radius:var(--radius);z-index:10}
.skip:focus{left:16px}
.label{margin:0;font-family:var(--f-mono);font-size:.7rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--verdigris)}
.muted{color:var(--muted)}

/* header */
.site-header{max-width:var(--wrap);margin-inline:auto;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 28px;padding-block:18px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none}
.brand svg{width:34px;height:34px;flex:none}
.brand-name{font-family:var(--f-display);font-weight:800;font-size:1.65rem;line-height:1;letter-spacing:.03em;text-transform:uppercase}
.nav{display:flex;flex-wrap:wrap;gap:4px 18px}
.nav a{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);text-decoration:none;padding-block:6px}
.nav a:hover{color:var(--ink)}

/* hero */
.hero{max-width:var(--wrap);margin-inline:auto;display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);gap:clamp(28px,5vw,72px);align-items:center;padding-block:clamp(20px,5vw,64px) clamp(48px,7vw,96px)}
.hero-copy{min-width:0}
.hero h1{margin:14px 0 22px;font-family:var(--f-display);font-weight:800;font-size:clamp(3.5rem,9.6vw,7.4rem);line-height:.86;letter-spacing:.005em;text-transform:uppercase;color:var(--brass)}
.lede{margin:0 0 28px;max-width:34em;font-size:clamp(1.05rem,1.5vw,1.2rem)}
.hero-art{min-width:0}
.hero-art svg{display:block;width:100%;height:auto;filter:drop-shadow(0 24px 34px var(--shadow))}
.ring{transform-box:view-box;transform-origin:512px 512px;animation:turn 1.8s cubic-bezier(.2,.75,.2,1) both}
.glow{animation:glow 2s ease-out both}
@keyframes turn{from{transform:rotate(-90deg)}to{transform:rotate(0deg)}}
@keyframes glow{from{opacity:.35}to{opacity:1}}

/* buttons */
.cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border:1.5px solid transparent;border-radius:var(--radius);font-family:var(--f-body);font-size:1rem;font-weight:600;line-height:1.2;text-decoration:none;cursor:pointer}
.btn-primary{background:var(--brass-fill);border-color:var(--brass-fill);color:var(--on-brass)}
.btn-primary:hover{filter:brightness(1.06)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink)}
.btn[aria-disabled="true"],.btn:disabled{opacity:.5;cursor:not-allowed}
.copy{padding:7px 10px;border:1px solid transparent;border-radius:4px;background:var(--tint);color:var(--verdigris);font-family:var(--f-mono);font-size:.68rem;font-weight:500;letter-spacing:.1em;text-transform:uppercase;cursor:pointer}
.copy:hover{border-color:var(--verdigris)}

/* contract address */
.ca{margin-top:30px;max-width:580px;padding:14px 16px;border:1.5px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.ca-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:8px}
.ca-value{flex:1 1 260px;min-width:0;font-size:.84rem;overflow-wrap:anywhere}
.ca-note{margin:10px 0 0;font-size:.85rem;color:var(--muted)}

/* sections */
.section{max-width:var(--wrap);margin-inline:auto;padding-block:clamp(52px,8vw,96px);border-top:1px solid var(--line)}
.section-head{display:grid;gap:10px;max-width:46em;margin-bottom:34px}
.section h2{margin:0;font-family:var(--f-display);font-weight:800;font-size:clamp(2.3rem,5vw,3.7rem);line-height:.92;letter-spacing:.01em;text-transform:uppercase}
.section-head p:not(.label){margin:0;font-size:1.05rem;color:var(--muted)}
.section h3{margin:0 0 10px;font-family:var(--f-body);font-weight:600;font-size:1.15rem;line-height:1.3}

/* what the key opens */
.opens{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.open{min-width:0;padding-top:16px;border-top:3px solid var(--brass-fill)}
.open h3{margin:10px 0;font-family:var(--f-display);font-weight:800;font-size:2rem;line-height:1;letter-spacing:.01em;text-transform:uppercase}
.open p:not(.label){margin:0}

/* market */
.market{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;align-items:start}
.panel{min-width:0;padding:22px;border:1.5px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.field{display:grid;gap:6px;margin-bottom:16px}
.field label{font-family:var(--f-mono);font-size:.68rem;font-weight:500;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.field input{width:100%;min-width:0;padding:11px 12px;border:1.5px solid var(--line);border-radius:var(--radius);background:var(--raised);color:var(--ink);font:inherit;font-size:1rem}
.field input:focus{outline:2px solid var(--verdigris);outline-offset:1px}
.hint{margin:8px 0 0;font-size:.82rem;color:var(--muted)}
.error{margin:0 0 14px;font-size:.92rem;color:var(--warn)}
.qr-box{display:grid;place-items:center;width:100%;max-width:260px;aspect-ratio:1;margin-inline:auto;padding:14px;border:1.5px solid var(--line);border-radius:var(--radius);background:var(--qr-paper)}
.qr-box img,.qr-box canvas{display:block;width:100%;height:auto;image-rendering:pixelated}
.qr-empty{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.1em;text-align:center;text-transform:uppercase;color:var(--qr-muted)}
.pay-link{display:block;margin:16px 0 12px;padding:10px 12px;border:1px dashed var(--line);border-radius:4px;background:var(--raised);font-size:.72rem;overflow-wrap:anywhere}
.rules-block{margin-top:36px;max-width:52em}
.rules{display:grid;gap:10px;margin:0;padding-left:1.15em}
.rules li{padding-left:4px}
.rules li::marker{color:var(--verdigris)}

/* how to join */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin:0 0 30px;padding:0;list-style:none;counter-reset:step}
.steps li{min-width:0;padding-top:14px;border-top:1.5px solid var(--line);counter-increment:step}
.steps li::before{content:counter(step,decimal-leading-zero);font-family:var(--f-mono);font-size:.72rem;letter-spacing:.1em;color:var(--verdigris)}
.steps h3{margin:8px 0 6px}
.steps p{margin:0;font-size:.95rem;color:var(--muted)}

/* token spec sheet */
.spec{overflow:hidden;border:2px solid var(--ink);border-radius:var(--radius);background:var(--raised)}
.spec-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 16px;padding:12px 18px;background:var(--ink);color:var(--bg);font-family:var(--f-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase}
.spec dl{display:grid;grid-template-columns:minmax(0,230px) minmax(0,1fr);margin:0}
.spec dt,.spec dd{margin:0;padding:13px 18px;border-top:1px solid var(--line)}
.spec dt{padding-top:16px;font-family:var(--f-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.spec dd{min-width:0;overflow-wrap:anywhere}
.spec dd .muted{display:block;font-size:.9rem}
.spec code{font-size:.82rem}
.si{margin-left:8px;font-family:var(--f-mono);font-size:.7rem;white-space:nowrap;color:var(--verdigris)}
.num{font-variant-numeric:tabular-nums}

/* litepaper */
.prose{max-width:68ch}
.prose h3{margin:30px 0 8px}
.prose h3:first-child{margin-top:0}
.prose p{margin:0 0 12px}
.log{display:grid;gap:10px;margin:0 0 12px;padding-left:1.15em}
.log li{padding-left:4px}
.log li::marker{color:var(--verdigris)}
.log strong{font-weight:600}

/* safety */
.safety{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:28px;align-items:start}
.links{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px 16px;margin:0}
.links dt{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);padding-top:3px}
.links dd{margin:0;min-width:0;overflow-wrap:anywhere}
.links code{font-size:.8rem}

/* faq */
.faq{max-width:820px}
.faq details{padding-block:16px;border-top:1px solid var(--line)}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{display:flex;justify-content:space-between;gap:16px;font-size:1.05rem;font-weight:600;list-style:none;cursor:pointer}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:none;font-family:var(--f-mono);color:var(--verdigris)}
.faq details[open] summary::after{content:"\2013"}
.faq details p{max-width:68ch;margin:10px 0 0}

/* footer */
.site-footer{max-width:var(--wrap);margin-inline:auto;display:grid;gap:14px;padding-block:40px 56px;border-top:1px solid var(--line);font-size:.86rem;color:var(--muted)}
.footer-top{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px}
.footer-links{display:flex;flex-wrap:wrap;gap:6px 18px}
.site-footer p{margin:0;max-width:70ch}

@media (max-width:900px){
  .opens{grid-template-columns:1fr;gap:24px}
  .market,.safety{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:820px){
  .hero{grid-template-columns:1fr}
  .hero-art{order:-1;width:min(200px,52vw);margin-inline:auto}
  .nav{gap:2px 14px}
}
@media (max-width:640px){
  .spec dl{grid-template-columns:1fr}
  .spec dd{padding-top:0;border-top:0}
}
@media (max-width:560px){
  .steps{grid-template-columns:1fr}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .ring,.glow{animation:none}
}