/* Neutral pages served on the public host: landing, not found, error. */
:root { color-scheme: light dark; }
body.plain {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 16px;
    box-sizing: border-box;
    font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: #f5f6f8;
    color: #1d2330;
}
.plain-card { max-width: 30rem; text-align: center; }
.plain-card h1 { font-size: 1.5rem; margin: 0 0 .5rem; }
.plain-card p { margin: 0 0 .5rem; color: #5b6475; }
@media (prefers-color-scheme: dark) {
    body.plain { background: #15181e; color: #e7e9ee; }
    .plain-card p { color: #a3aab8; }
}