body { font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif; background: #0f172a; color: #e5e7eb; display: flex; align-items: center; justify-content: center; height: 100vh; margin: 0; } main { text-align: center; padding: 2rem 3rem; border-radius: 0.75rem; background: rgba(15,23,42,0.9); box-shadow: 0 20px 40px rgba(15,23,42,0.6); } h1 { font-size: 1.8rem; margin-bottom: 0.75rem; } p { opacity: 0.85; }