:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--bg-color: #f3f4f6;--card-bg: #ffffff;--text-main: #111827;--text-muted: #6b7280;--error-color: #ef4444;--font-family: "Inter", system-ui, -apple-system, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-main);line-height:1.5;display:flex;justify-content:center;align-items:center;min-height:100vh}button{cursor:pointer;font-family:inherit}