:root{
  --ink:#16161d;--ink-soft:#4b4b55;--line:#e4e4e8;--paper:#fff;--paper-soft:#f6f6f7;
  --accent:#1f5eea;--accent-strong:#1747b8;--accent-soft:#7aa5ff;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Archivo',Helvetica,Arial,sans-serif;background:var(--paper);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.container{max-width:860px;margin:0 auto;padding:0 32px}
header{position:sticky;top:0;background:var(--paper);border-bottom:1px solid var(--line);z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px;max-width:1240px;margin:0 auto;padding:0 32px}
.logo{display:flex;align-items:center;gap:14px;font-weight:700;font-size:1.12rem}
.logo-mark{width:38px;height:38px;background:var(--ink);color:var(--accent-soft);display:grid;place-items:center;font-size:1.15rem;font-weight:700}
.logo small{display:block;font-size:.68rem;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--ink-soft)}
.back{font-size:.9rem;font-weight:600;box-shadow:inset 0 -2px 0 var(--accent);padding-bottom:2px}
main{padding:80px 0 110px}
.kicker{display:inline-block;font-size:.74rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;border-top:3px solid var(--accent);padding-top:12px;margin-bottom:24px}
h1{font-size:clamp(1.9rem,3.6vw,2.6rem);letter-spacing:-.02em;line-height:1.15;margin-bottom:40px}
h2{font-size:1.25rem;letter-spacing:-.01em;margin:44px 0 14px;padding-top:24px;border-top:1px solid var(--line)}
p,li{color:var(--ink-soft);font-size:.96rem;margin-bottom:12px}
ul{padding-left:22px;margin-bottom:12px}
strong{color:var(--ink)}
.todo{background:#fff8e6;border:1px solid #f0d890;padding:3px 8px;font-size:.88rem;color:#7a5c00}
.btn{display:inline-flex;align-items:center;gap:12px;padding:16px 32px;font-weight:600;font-size:.92rem;background:var(--ink);color:#fff;margin-top:24px}
.btn:hover{background:#000}
footer{background:var(--ink);color:rgba(255,255,255,.6);padding:32px 0;font-size:.82rem}
footer .container{max-width:1240px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer a{color:rgba(255,255,255,.85)}
footer a:hover{color:var(--accent-soft)}