:root{--background-color: #ffffff;--text-color: #000000}body.dark-mode{--background-color: #181818;--text-color: #ffffff}body,p,h1,h2,h3,h4,h5,h6,span,a,li{color:var(--text-color)}body{background-color:var(--background-color);transition:background-color .3s ease,color .3s ease}