body{margin:0;padding:0;font-family:Segoe UI,Arial,sans-serif;background:#f7f7fa;color:#222}h1,h2,h3{font-weight:600;margin-bottom:.5em}a{color:#0070f3;text-decoration:none}a:hover{text-decoration:underline}.container{max-width:900px;margin:2rem auto;padding:1.5rem;background:#000000;border-radius:12px;box-shadow:0 2px 12px rgba(0,0,0,.07)}