: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}}body,html{margin:0;padding:0;background:#121212;color:#fff;font-family:Arial,sans-serif;height:100%}.app-container{display:flex;flex-direction:column;min-height:100vh;padding:1rem}.header{display:flex;justify-content:space-between;align-items:center;padding:.6rem 1rem;background:#1e1e1e;border-radius:12px}.brand{font-size:1.4rem;font-weight:700;color:#00bfff}.score{margin-right:1rem}.audio-btn,.menu-btn{background:#00bfff;border:none;border-radius:8px;padding:.4rem .7rem;cursor:pointer;color:#fff;margin-left:.5rem;font-size:1rem}.main-content{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.title{font-size:2.2rem;margin-top:2rem}.subtitle{color:#aaa;margin-bottom:2rem}.start-btn{padding:.8rem 1.5rem;font-size:1.1rem;border:none;border-radius:12px;background:#27ae60;color:#fff;cursor:pointer;transition:background .3s}.start-btn:hover{background:#219150}.card-list{margin-top:1.5rem;display:flex;flex-wrap:wrap;justify-content:center;gap:1rem}.card{background:#1e1e1e;border-radius:12px;padding:1rem;width:220px;text-align:left}@media(max-width:600px){.header{flex-direction:column}.card{width:90%}.title{font-size:1.8rem}}