:root{color-scheme:light dark;font-family:system-ui,-apple-system,sans-serif}body{margin:0;min-height:100vh;display:grid;place-items:center;background:#f4f7fb;color:#172033}main{width:min(90vw,560px);box-sizing:border-box;padding:2rem;border:1px solid #d9e1ec;border-radius:16px;background:#fff;box-shadow:0 12px 35px #16233a18}h1{margin-top:0;font-size:1.5rem}.detail{color:#596579;font-size:.92rem}@media(prefers-color-scheme:dark){body{background:#101722;color:#edf3ff}main{background:#182233;border-color:#30405a}.detail{color:#aab7ca}}