:root{
  --bg:#f5f7fb; --surface:#fff; --ink:#0f172a; --ink2:#334155; --muted:#64748b;
  --line:#e2e8f0; --brand:#2563eb; --brand2:#60a5fa;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#0b1220; --surface:#111a2e; --ink:#e8eefc; --ink2:#c3cfe6; --muted:#8fa0bd; --line:#1f2b45; }
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);line-height:1.65;
     font-family:system-ui,-apple-system,'Segoe UI',Roboto,'Noto Sans',sans-serif}
header{border-bottom:1px solid var(--line);background:var(--surface)}
.brand{display:flex;align-items:center;gap:10px;max-width:780px;margin:0 auto;padding:16px 20px;
       font-weight:800;text-decoration:none;color:inherit;letter-spacing:-.3px}
.brand span.mark{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;font-size:13px;
     background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}
.brand span:last-child{color:var(--brand)}
main{max-width:780px;margin:0 auto;padding:30px 20px 50px}
h1{font-size:30px;letter-spacing:-.8px;margin:0 0 6px}
h2{font-size:18px;margin:30px 0 8px;letter-spacing:-.3px}
p,li{color:var(--ink2);font-size:15px}
ul{padding-left:20px}
li{margin-bottom:6px}
a{color:var(--brand)}
.meta{color:var(--muted);font-size:13px;margin:0 0 22px}
.contact{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px}
.todo{display:block;margin-top:8px;color:var(--muted);font-size:13px;font-style:italic}
footer{border-top:1px solid var(--line);padding:22px 20px 40px;text-align:center;color:var(--muted);font-size:13px}
footer a{color:var(--muted)}

.logo-mark{height:30px;width:auto;object-fit:contain}
@media (prefers-color-scheme:dark){.logo-mark{content:url('/assets/mark-dark.png')}}