:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--background: #f7f7f7;--foreground: #222;--card-bg: #fff;--token-blue: #1976d2;--gameover-red: #d32f2f}@media (prefers-color-scheme: dark){:root{--background: #181a1b;--foreground: #f5f5f5;--card-bg: #23272a;--token-blue: #90caf9;--gameover-red: #ff6f6f}}body{background:var(--background);color:var(--foreground);margin:0}.card-flip-inner{width:100%;height:100%;position:relative;transform-style:preserve-3d;transition:transform .7s ease-in-out;z-index:1}.card-flip-front,.card-flip-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:5px;display:flex;align-items:center;justify-content:center}.card-flip-front{background:var(--card-bg)}.card-flip-back{background:#fff;transform:rotateY(180deg)}