/* SatoshiSolver — static site styles. No external fonts or assets. */
:root{
  --orange:#f7931a; --orange-dark:#a35400; --ink:#14161a; --muted:#4a5160;
  --line:#e4e6eb; --bg:#ffffff; --soft:#f7f7f9; --cream:#fff6ea;
  --radius:14px; --max:1080px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);font-size:1.0625rem;line-height:1.6;color:var(--ink);background:var(--bg)}
img,svg{max-width:100%;height:auto}
a{color:var(--orange-dark);text-underline-offset:2px}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:4px}
h1,h2,h3{line-height:1.2;margin:0 0 .6em}
h1{font-size:clamp(2rem,5vw,3.1rem);letter-spacing:-.02em}
h2{font-size:clamp(1.5rem,3.2vw,2.1rem);letter-spacing:-.01em}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 1.25rem}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.6em 1em;z-index:10}
.skip:focus{left:1rem;top:1rem}
/* header */
.site-header{border-bottom:1px solid var(--line);background:#fff}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:68px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.25rem;letter-spacing:-.01em}
.brand img{width:36px;height:36px}
.brand b{color:var(--orange-dark);font-weight:800}
.nav{display:flex;gap:.2rem 1.1rem;flex-wrap:wrap;font-size:.98rem}
.nav a{color:var(--ink);text-decoration:none;padding:.3em 0}
.nav a:hover{color:var(--orange-dark);text-decoration:underline}
/* hero */
.hero{background:linear-gradient(180deg,var(--cream),#fff);padding:4.5rem 0 3.5rem}
.eyebrow{display:inline-block;font-size:.85rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--orange-dark);margin-bottom:.8rem}
.lede{font-size:1.2rem;color:var(--muted);max-width:44rem}
.cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.6rem}
.btn{display:inline-block;padding:.8em 1.3em;border-radius:999px;font-weight:700;text-decoration:none;border:2px solid var(--orange);font-size:1rem}
.btn-primary{background:var(--orange);color:#14161a}
.btn-primary:hover{background:#ffa733;color:#14161a}
.btn-ghost{background:#fff;color:var(--ink)}
.btn-ghost:hover{background:var(--cream);color:var(--ink)}
.status{margin-top:1.2rem;font-size:.95rem;color:var(--muted)}
/* sections */
section{padding:3.5rem 0}
section.alt{background:var(--soft)}
.grid{display:grid;gap:1.2rem;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem}
.card p:last-child{margin-bottom:0}
.icon{display:inline-flex;width:40px;height:40px;border-radius:10px;background:var(--cream);color:var(--orange-dark);align-items:center;justify-content:center;margin-bottom:.8rem}
.icon svg{width:22px;height:22px}
.apps{list-style:none;padding:0;margin:1.2rem 0;display:flex;flex-wrap:wrap;gap:.6rem}
.apps li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:.45em 1em;font-weight:600;font-size:.98rem}
.note{font-size:.92rem;color:var(--muted)}
.checker{border:2px solid var(--orange);background:#fff;border-radius:var(--radius);padding:1.8rem}
.badge{display:inline-block;background:var(--ink);color:#fff;border-radius:999px;padding:.2em .8em;font-size:.8rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;margin-bottom:.8rem}
.checklist{padding-left:1.2rem}
.checklist li{margin:.35em 0}
.two{display:grid;gap:2rem;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));align-items:start}
.disclaimer{border-left:4px solid var(--orange);background:var(--cream);padding:1rem 1.2rem;border-radius:0 var(--radius) var(--radius) 0;font-size:.95rem}
/* doc pages */
.doc{padding:3rem 0 4rem}
.doc .wrap{max-width:760px}
.draft-banner{background:#fff4d6;border:1px solid #f0c36d;border-radius:var(--radius);padding:1rem 1.2rem;margin:0 0 2rem;font-weight:600}
.doc h2{font-size:1.35rem;margin-top:2rem}
.doc ul{padding-left:1.2rem}
/* footer */
.site-footer{border-top:1px solid var(--line);background:var(--soft);padding:2rem 0;font-size:.95rem;color:var(--muted)}
.site-footer p{margin:.3em 0}
.site-footer nav{display:flex;gap:1.2rem;flex-wrap:wrap;margin-top:.6rem}
.site-footer a{color:var(--ink)}
@media (max-width:560px){
  .hero{padding:3rem 0 2.5rem}
  section{padding:2.6rem 0}
  .nav{gap:0 .9rem;font-size:.95rem;padding-bottom:.5rem}
  .site-header .wrap{gap:.2rem;padding-top:.5rem}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}