:root{font:17px/1.5 system-ui;color:#102b40;background:#f3f6fa}body{margin:0}header{display:flex;justify-content:space-between;padding:24px;border-bottom:1px solid #d9e2ea}main{max-width:560px;margin:8vh auto;padding:28px}h1{font-size:36px;line-height:1.15}button{font:inherit;padding:12px 20px;border:0;border-radius:8px;background:#0864ae;color:white;cursor:pointer}button:disabled{background:#687887;cursor:not-allowed}.card{background:white;border:1px solid #d9e2ea;padding:24px;border-radius:12px}small{display:block;margin-top:24px;color:#526575}