html,body{background:#f7f9fc}
[data-cy="message"]{border-radius:16px;box-shadow:0 8px 24px rgba(0,0,0,.06)}
header,[data-cy="header"]{background:linear-gradient(90deg,#0ea5e9,#6366f1);color:#fff}
[data-cy="header-title"]{color:#fff;font-weight:700}
hide Readme tab:
[data-cy="header-readme"],a[href="#/readme"]{display:none!important}