:root{--bg:#f6f8fa;--card:#fff;--text:#111827}
*{box-sizing:border-box}
html,body,#app{height:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}
.center{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:2rem}
.card{background:var(--card);padding:2rem;border-radius:12px;box-shadow:0 8px 24px rgba(2,6,23,0.08);max-width:880px;text-align:center}
.card h1{margin:0;font-size:2rem}
.card .subtitle{color:#6b7280;margin-top:.5rem}
.card img{max-width:100%;height:auto;border-radius:8px;margin-top:1rem}