:root{color-scheme:dark}body{margin:0;padding:0}body{margin:0;font-family:system-ui,-apple-system,sans-serif;background:#0a0a0a;color:#e0e0e0;min-height:100vh;display:flex;align-items:center;justify-content:center}.app{text-align:center;padding:2rem}h1{font-size:2.5rem;margin-bottom:.5rem;background:linear-gradient(90deg,#00d4aa,#00a8e8);-webkit-background-clip:text;-webkit-text-fill-color:transparent}button{margin-top:1rem;padding:.75rem 1.5rem;font-size:1rem;border:1px solid #333;border-radius:.5rem;background:#1a1a1a;color:#e0e0e0;cursor:pointer;transition:border-color .2s}button:hover{border-color:#00d4aa}