:root{
  --bg:#FFFFFF; --bg-alt:#F5F5F4; --ink:#0D0D0D; --muted:#57534E; --accent:#F25C05; --accent-text:#C2410C; --border:#E7E5E4;
  --display:"Archivo Black","Arial Black",sans-serif; --sans:Inter,"Helvetica Neue",Arial,sans-serif;
  color-scheme:light; box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){--bg:#0D0D0D;--bg-alt:#1A1A1A;--ink:#FFFFFF;--muted:#A8A29E;--accent:#FF7A2E;--accent-text:#FF7A2E;--border:#2E2E2E;color-scheme:dark}
}
:root[data-theme="dark"]{--bg:#0D0D0D;--bg-alt:#1A1A1A;--ink:#FFFFFF;--muted:#A8A29E;--accent:#FF7A2E;--accent-text:#FF7A2E;--border:#2E2E2E;color-scheme:dark}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:4px}
.top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px clamp(20px,4vw,56px);border-bottom:1px solid var(--border)}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit}
.brand svg{width:34px;height:34px;flex:none}
.brand-words{display:flex;flex-direction:column;line-height:1}
.brand-the{font-family:var(--display);font-size:10px;letter-spacing:.4em;color:var(--accent-text)}
.brand-name{font-family:var(--display);font-size:20px;margin-top:3px}
.back{display:inline-flex;align-items:center;gap:8px;font-weight:700;text-decoration:none;color:var(--ink);padding:8px 0}
.back:hover{color:var(--accent-text)}
.doc{max-width:72ch;margin:0 auto;padding:clamp(32px,6vw,72px) 20px 64px;line-height:1.7}
.doc h1{font-family:var(--display);font-weight:400;font-size:clamp(2.4rem,7vw,4.5rem);line-height:.95;margin:0}
.eff{color:var(--muted);font-weight:600;margin:16px 0 0}
.doc h2{font-size:1.3rem;font-weight:800;line-height:1.3;margin:44px 0 0;padding-top:20px;border-top:1px solid var(--border)}
.doc h3{font-size:1.05rem;font-weight:700;margin:24px 0 0}
.doc p,.doc ul{margin:12px 0 0;color:var(--muted)}
.doc ul{padding-left:1.3em}
.doc li+li{margin-top:6px}
.doc strong{color:var(--ink)}
.doc a{color:var(--accent-text);font-weight:600}
.doc .card{background:var(--bg-alt);border-radius:10px;padding:18px 20px;margin-top:16px}
.doc .card p{margin:4px 0 0}
.foot{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 20px;padding:20px clamp(20px,4vw,56px);border-top:1px solid var(--border);font-size:13px;color:var(--muted)}
.foot nav{display:flex;gap:18px}
.foot a{color:var(--muted);font-weight:600;text-decoration:none}
.foot a:hover{color:var(--ink)}
@media (max-width:520px){.back{font-size:14px}}