.app{max-width:640px;margin:0 auto;padding:2rem 1rem}h1{margin-bottom:.25rem}.tagline{color:#57606a;margin-top:0}.card{background:#fff;border:1px solid #d0d7de;border-radius:8px;padding:1rem 1.25rem;margin-top:1rem}.card h2{margin-top:0;font-size:1.1rem}.error{color:#cf222e}.welcome{text-align:center}.welcome-points{list-style:none;padding:0;margin:0 0 1.25rem;text-align:left}.welcome-points li{margin:.6rem 0;line-height:1.45}button.primary{background:#1f6feb;color:#fff;border:none;border-radius:6px;padding:.6rem 1.2rem;font-size:1rem;cursor:pointer}button.primary:hover{background:#1a5fd0}:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;color:#1a1a1a;background:#f6f8fa}*{box-sizing:border-box}body{margin:0;min-height:100vh}button{font:inherit;cursor:pointer;border:1px solid #1f6feb;background:#1f6feb;color:#fff;border-radius:6px;padding:.5rem 1rem}button:disabled{opacity:.5;cursor:not-allowed}