body{margin:0;min-height:100vh;background:#000;color:#fff;font-family:system-ui,-apple-system,sans-serif;display:flex;align-items:center;justify-content:center}#app{width:100%;max-width:800px;padding:24px;box-sizing:border-box;text-align:center}#app h1{font-size:clamp(2.5rem,8vw,5rem);font-weight:600;margin:0;letter-spacing:-.02em}