*{box-sizing:border-box}html{color-scheme:light;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#18202c;background:#f7f8fa;line-height:1.65}body{margin:0}header,main,footer{max-width:860px;margin:auto;padding:24px}header{display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid #dbe1e8}nav{display:flex;gap:20px;flex-wrap:wrap}.brand{font-size:24px;font-weight:750;text-decoration:none;color:#172c45}main{padding-top:36px;padding-bottom:48px}h1{font-size:clamp(30px,5vw,42px);line-height:1.2;margin:0 0 24px}h2{font-size:23px;line-height:1.3;margin:36px 0 14px}p,ul{margin:0 0 20px}li{margin-bottom:10px}a{color:#0757b2;text-underline-offset:3px;overflow-wrap:anywhere}a:focus-visible{outline:3px solid #176bc1;outline-offset:4px}footer{border-top:1px solid #dbe1e8;color:#526176;font-size:14px}@media(max-width:560px){header{align-items:flex-start;flex-direction:column;gap:10px}header,main,footer{padding-left:20px;padding-right:20px}nav{gap:16px;font-size:14px}}