body{margin:0;background:#f1f5f9;color:#142331;font:18px/1.6 system-ui,sans-serif}main{max-width:50rem;margin:8vh auto;padding:2rem}header{display:flex;justify-content:space-between;border-bottom:1px solid #bac9d5;padding-bottom:1rem}a{color:#125878}button{font:inherit;padding:.55rem 1rem;cursor:pointer}