:root{color-scheme:light;--ink:#1d2433;--muted:#5b6475;--line:#e3e6ec;--accent:#0b7a5b}
*{box-sizing:border-box}body{margin:0;font:16px/1.75 system-ui,-apple-system,"Segoe UI",Tahoma,sans-serif;color:var(--ink);background:#f7f8fa}
main{max-width:760px;margin:0 auto;padding:40px 20px 64px}
h1{font-size:1.6rem;line-height:1.3;margin:0 0 4px}h2{font-size:1.1rem;margin:28px 0 6px}
.sub{color:var(--muted);margin:0 0 24px}a{color:var(--accent)}
section{background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px 24px;margin:0 0 20px}
section[dir=rtl]{font-family:Tahoma,system-ui,sans-serif}
footer{color:var(--muted);font-size:.9rem;margin-top:28px}
ul{padding-inline-start:22px}