:root{color-scheme:light dark;--bg:#ffffff;--fg:#16191d;--muted:#5b636e;--border:#dfe3e8;--accent:#1b4dff}@media (prefers-color-scheme:dark){:root{--bg:#101215;--fg:#eef1f5;--muted:#a2abb7;--border:#2a2f37;--accent:#7d95ff}}*{box-sizing:border-box}body,html{margin:0;padding:0;min-height:100%;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.shell{display:flex;align-items:center;justify-content:center;min-height:100vh;min-height:100dvh;overflow:auto;padding:2rem}.card{width:100%;max-width:26rem;border:1px solid var(--border);border-radius:14px;padding:2rem;text-align:center}.card h1{margin:0 0 .5rem;font-size:1.35rem;letter-spacing:-.01em}.card p{margin:0 0 1.5rem;color:var(--muted);font-size:.9rem;line-height:1.5}.card p:last-child{margin-bottom:0}.btn{display:inline-block;width:100%;padding:.7rem 1rem;font-size:.95rem;font-weight:600;color:#ffffff;background:var(--accent);border:0;border-radius:9px;cursor:pointer}.btn:hover{filter:brightness(1.08)}.note{margin-top:1.25rem;color:var(--muted)}.mono,.note{font-size:.78rem}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}