.bg-gradient,.bg-gradient-foot{background:linear-gradient(180deg,#f0f,#2e00d4);background-size:200% 200%}body{font-family:monospace,sans-serif}h1{font-size:1.6rem}h2{font-size:1.3rem}h3{font-size:1.1rem}footer,header{background-color:#333;color:#fff;padding:1rem;text-align:center}main{min-height:calc(100vh - 156px)}