html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #000;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#game-canvas {
    background-color: #fff;
    display: block;
}

#ui-container {
    position: absolute;
    top: 2vh;
    left: 2vw;
    right: 2vw;
    display: flex;
    justify-content: space-between;
    color: #333;
    font-size: 4vw;
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.8);
    text-align: center;
}

.screen h1 {
    font-size: 10vw;
    margin-bottom: 5vh;
}

.screen button {
    font-size: 5vw;
    padding: 2vh 4vw;
    cursor: pointer;
    border: 2px solid #333;
    background-color: #fff;
    margin: 2vh;
}

.screen button:hover {
    background-color: #ddd;
}

.sound-indicator {
    margin-top: 20px;
    font-size: 3vw;
    color: #555;
}