:root{--color-primary:#42a5f5;--color-primary-light:#bbdefb;--color-primary-dark:#1565c0;--color-gradient:linear-gradient(135deg, #1565c0, #42a5f5)}*{box-sizing:border-box;margin:0;padding:0}body{color:#333;background:#f5f5f5;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}button{cursor:pointer;border:none;outline:none}