*{box-sizing:border-box}body{margin:0;background:#f0f4fc;color:#1a1f29;font:17px/1.65 system-ui,sans-serif}header,main,footer{max-width:960px;margin:auto;padding:28px}header{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}a{color:#0038b8}nav{display:flex;gap:18px}main{background:white;border-radius:18px;margin:20px auto 40px;padding:44px}h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.15;letter-spacing:-.03em}h2{margin-top:32px}.lead{font-size:1.3rem;color:#3a3f4a}.notice{background:#fff1cb;padding:12px 20px;border-radius:8px;font-size:14px}.button{display:inline-block;background:#0038b8;color:white;padding:12px 22px;border-radius:8px;text-decoration:none}footer{font-size:14px}@media(max-width:650px){main{margin:12px;padding:24px}header,footer{padding:20px}}