:root{color-scheme:light dark;--bg: #0f172a;--fg: #e2e8f0;--muted: #94a3b8;--card: #111827;--border: rgba(255,255,255,.1)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;background:var(--bg);color:var(--fg)}.container{min-height:100%;display:grid;place-items:center;padding:2rem}.card{text-align:center;padding:3rem 2rem;width:min(90vw,640px);background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:0 10px 30px #00000059}h1{margin:0 0 .75rem;font-weight:800;letter-spacing:.4px}p{margin:0;color:var(--muted)}