body{font-family:-apple-system,system-ui;margin:0;text-align:center}
header{padding:20px;border-bottom:1px solid #eee}
nav button{margin:5px;padding:10px;border:1px solid #ddd;background:#fff;cursor:pointer}
.tab{display:none;padding:40px}
.tab.active{display:block}
input{display:block;margin:10px auto;padding:12px;width:260px;border-radius:6px;border:1px solid #ddd}
button{padding:12px 16px;margin-top:10px;border-radius:6px;border:1px solid #ddd;background:#fff}
.cta{display:inline-block;margin:10px;padding:14px;border:1px solid #000;color:#000;text-decoration:none}