:root{--principal-color:#318ce7;--principal-color-light:#4295e9}.card{border-radius:20px;border:1px solid;margin:20px;text-align:justify}.small{min-width:40%}.large,.small{width:40%;padding:20px;margin:20px}.wrap{flex-wrap:wrap}.column{margin:10px}.centered{margin:auto}footer{text-align:center;background-color:var(--principal-color);padding:5px}.small-image{height:30px;margin-right:5px;margin-left:5px;margin-top:5px}main{margin-left:5%;margin-right:5%;margin-bottom:5%}.flex-container{display:flex}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}a:link{text-decoration:none}a:hover,a:visited{color:coral}a:active,a:hover,a:visited{text-decoration:none}header{background-color:var(--principal-color)}.header-item:hover{background-color:#569ce3}.cell-chess{height:50px;width:50px;margin:0;text-align:center;position:relative}.colored-chess-square{background-color:var(--principal-color)}.cell-chess-content{margin:0;position:absolute;max-width:100%;top:50%;left:50%;transform:translate(-50%,-50%)}.selected-chess-cell-element{background-color:#ff0}.cell-sudoku{height:50px;width:50px;margin:0;text-align:center;position:relative}.unvalid-cell{background-color:red}.clickable{cursor:pointer}.cell-sudoku-content{margin:0;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.selected-sudoku-cell-element{background-color:#ff0}.top-thin-border{border-top:1px solid #000}.top-border{border-top:3px solid #000}.left-thin-border{border-left:1px solid #000}.left-border{border-left:3px solid #000}.right-border{border-right:3px solid #000}.bottom-border{border-bottom:3px solid #000}.number-card{border:1px solid grey;padding:8px;margin:3px;size:20px}.cell-tictactoe{padding-top:100px;width:100px;margin:0;cursor:pointer}.cell-circle{position:relative;top:-95px;left:5px;margin-bottom:-100px;border-radius:100%;background-color:transparent!important;width:70px;padding-top:70px;border:10px solid blue}.cell-cross{width:8px;padding-top:100px;background-color:red;margin-left:46px;transform:rotate(45deg);border-radius:4px;margin-top:-100px}.cell-cross2{transform:rotate(-45deg);top:-100px;position:relative;margin-top:0;margin-bottom:-100px}.top-border{border-top:3px solid blue}.left-border{border-left:3px solid blue}.line-cells,.tictactoe{width:min-content}.tictactoe{margin:5px auto}.youtube{margin:0;padding:0;box-sizing:border-box;font-family:sans-serif}a.youtube{-webkit-text-decoration:none important;text-decoration:none important;color:#5a5a5a}img.youtube{cursor:pointer}.flex-div{display:flex;align-items:center}.basic-button{background-color:#f2f2f2;padding:7px 12px;border:1px solid #000;cursor:pointer;margin:0 20px;border-radius:100vw}.basic-button:hover{background-color:#e9e9e9}