*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:radial-gradient(circle at top,#111827,#020617);color:#e5e7eb;min-height:100vh}.app-container{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:2rem 1rem}.app-header{text-align:center;margin-bottom:2rem}.app-header h1{font-size:2.4rem;letter-spacing:.05em}.app-header p{margin-top:.5rem;color:#9ca3af}.app-main{width:100%;max-width:800px}.card{background:#0f172ae6;border-radius:1rem;padding:1.75rem 1.5rem;border:1px solid rgba(148,163,184,.3);box-shadow:0 20px 40px #0f172acc}.card h2{font-size:1.4rem;margin-bottom:.75rem}.card p{margin-bottom:.75rem;color:#d1d5db}.card pre{background:#020617;padding:.85rem 1rem;border-radius:.75rem;overflow-x:auto;font-size:.9rem;border:1px solid rgba(31,41,55,.9)}.card code{font-family:Fira Code,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;color:#a5b4fc}.app-footer{margin-top:2rem;font-size:.85rem;color:#6b7280}@media (min-width: 768px){.app-header h1{font-size:2.8rem}.card{padding:2rem}}