*{padding:0;margin:0;box-sizing:border-box}body{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}header{display:block;margin:0 auto;width:100%;text-align:center}header h1{font-family:Arial;font-size:30px;font-weight:700;margin:20px}.game-container{min-height:100vh;background-color:#faf8ef;padding:20px}#grid-container{touch-action:none;-webkit-touch-callout:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}@media (max-width:768px){.game-container,body{overflow-y:auto;-webkit-overflow-scrolling:touch}}