:root{--bg:#1f1f1f;--surface:#282828;--border:#3e3e3e;--text:#f1f1f1;--muted:#aaa;--brand:#3ea6ff;--cut:#ff4e45;color-scheme:dark}
@media (prefers-color-scheme:light){:root{--bg:#f9f9f9;--surface:#fff;--border:#e5e5e5;--text:#0d0d0d;--muted:#606060;--brand:#065fd4;--cut:#cc0000;color-scheme:light}}
*{box-sizing:border-box}body{margin:0;font:16px/1.6 Roboto,"Helvetica Neue",-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--brand)}header,footer,main{max-width:860px;margin:0 auto;padding:0 20px}
header{display:flex;align-items:center;gap:12px;height:64px;border-bottom:1px solid var(--border)}
header img{width:28px;height:28px;border-radius:6px}header b{font-size:18px}header nav{margin-left:auto;display:flex;gap:18px;font-size:14px}header nav a{color:var(--muted);text-decoration:none}header nav a:hover{color:var(--text)}
main{padding-top:40px;padding-bottom:56px}h1{font-size:34px;line-height:1.2;margin:0 0 12px;font-weight:600}h2{font-size:20px;margin:32px 0 8px;font-weight:600}
.lead{font-size:18px;color:var(--muted);max-width:640px}.muted{color:var(--muted)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:32px}.step{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:18px}.step b{display:block;margin-bottom:4px}
.cut{display:inline-block;width:3px;height:1em;background:var(--cut);vertical-align:-2px;margin:0 6px;border-radius:2px}
footer{border-top:1px solid var(--border);padding-top:16px;padding-bottom:32px;font-size:13px;color:var(--muted);display:flex;gap:18px;flex-wrap:wrap}
@media(max-width:700px){.steps{grid-template-columns:1fr}h1{font-size:28px}}