:root{font:16px/1.7 system-ui,sans-serif;color:#172554;background:#f4f7fa}body{margin:0;padding:6vh 20px}main{max-width:720px;margin:auto;padding:clamp(24px,5vw,52px);background:#fff;border:1px solid #e2e8f0;border-radius:24px}h1{font-size:clamp(24px,4vw,34px);line-height:1.25}h2{font-size:21px;line-height:1.4;margin-top:32px}a{color:#1d4ed8}.brand{font-size:24px;font-weight:800;text-decoration:none}button{border:0;border-radius:10px;padding:14px 20px;background:#172554;color:#fff;font:inherit;cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #38bdf8;outline-offset:4px}label{display:block;margin-bottom:12px}input{font:inherit;border:1px solid #cbd5e1;border-radius:8px;padding:8px 12px;max-width:120px}