body {
    margin: 0;
    padding: 0;
    background-color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden;
}

#game-container {
    position: relative;
    box-shadow: 0 0 20px rgba(0,0,0,0.5);
}

canvas {
    background-color: #5c94fc; /* Sky blue */
    display: block;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#score {
    position: absolute;
    top: 20px;
    left: 20px;
    color: white;
    font-size: 24px;
    font-weight: bold;
    text-shadow: 2px 2px 0 #000;
}

#start-screen, #game-over-screen, #win-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 20px 40px;
    border-radius: 10px;
    border: 2px solid #fff;
}

h1 {
    margin-top: 0;
    font-size: 32px;
    text-transform: uppercase;
    text-shadow: 3px 3px 0 #e70000;
}

p {
    font-size: 18px;
    margin-bottom: 0;
}

.hidden {
    display: none;
}