:root{--main-gradient: linear-gradient(90deg, rgba(195,54,233,1) 0%, rgba(195,54,233,1) 20%, rgba(0,212,255,1) 100%);--main-bg-color: #2b2b2b;--white-bg-color: rgba(255, 255, 255, .4);--main-text-color: #e6e1dc;--green-text: #519f50;--yellow-text: #ffd24a;--red-text: #da4939}html{box-sizing:border-box;font-size:16px}*,*:before,*:after{box-sizing:inherit}body{margin:0;font-family:sans-serif;line-height:1.5;color:var(--main-text-color);background:#000}img,video{height:auto;max-width:100%}h1{font-size:1.5em;margin:0}#message{font-weight:700}#game-board{position:relative}#player-or-ai{position:absolute;top:0;left:0;width:100%;height:100%;box-sizing:border-box;display:flex;flex-direction:column;gap:1em;justify-content:center;align-items:center}#player-or-ai>button{width:80%}