html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,hgroup,menu,nav,output,ruby,section,summary,time,mark,audio,video{border:0;font-size:100%;font:inherit;vertical-align:baseline;margin:0;padding:0}article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block}body{line-height:1}ol,ul{list-style:none}blockquote,q{quotes:none}blockquote:before,blockquote:after,q:before,q:after{content:none}table{border-collapse:collapse;border-spacing:0} @font-face { font-family: 'Circular'; src: url('../fonts/Circular-Book.woff') format('woff'); font-weight: normal; } @font-face { font-family: 'Circular'; src: url('../fonts/Circular-Bold.woff') format('woff'); font-weight: bold; } * { margin: 0; padding: 0; box-sizing: border-box; } html, body { background: #18212D; } body { position: absolute; display: flex; align-items: center; justify-content: center; width: 100%; height: 100%; flex-wrap: wrap; color: white; font-family: 'Circular', sans-serif; -webkit-font-smoothing: antialiased; } section { min-width: 18rem; } div { width: 2rem; height: 2rem; } .red { background-color: #FF324A; } .green { background-color: #31FFA6; } .blue { background-color: #206EFF; } .yellow { background-color: #FFFF99; } .hidden { display: none; }