:root{--bg-color:#ffffff;--text-color:#000000;--text-secondary:#666666;--link-color:#0070f3;--border-color:#eaeaea}.dark{--bg-color:#000000;--text-color:#ffffff;--text-secondary:#888888;--link-color:#3291ff;--border-color:#333333}body,html{padding:0;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.6;font-size:18px;background-color:var(--bg-color);color:var(--text-color);transition:background-color .3s ease,color .3s ease}*{box-sizing:border-box}a{color:var(--link-color);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;display:block}