body {
    margin: 0;
    overflow: hidden;
    background-color: #222;
    color: white;
    font-family: 'Arial', sans-serif;
    text-align: center;
}

.ui-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    padding: 40px;
    border-radius: 15px;
    border: 3px solid #ffcc00;
    box-shadow: 0px 0px 20px #ffcc00;
}

h1 {
    font-size: 50px;
    color: #ffcc00;
    margin-bottom: 5px;
}

button {
    background-color: #ffcc00;
    color: black;
    font-size: 20px;
    font-weight: bold;
    padding: 10px 20px;
    margin: 10px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
    transition: 0.3s;
}

button:hover {
    background-color: #fff;
    transform: scale(1.1);
}

canvas {
    display: block;
    width: 100vw;
    height: 100vh;
}