* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #202020;
    color: #fff;
    font-family: 'Courier New', Courier, monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

#game-container {
    position: relative;
    width: 960px;
    max-width: 100vw;
    aspect-ratio: 4 / 3;
    background: #5c94fc;
    border: 4px solid #000;
    image-rendering: pixelated;
}

#game {
    width: 100%;
    height: 100%;
    display: block;
    image-rendering: pixelated;
}

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

.hud {
    display: flex;
    justify-content: space-between;
    padding: 8px 16px;
    font-size: 16px;
    text-shadow: 1px 1px 0 #000;
}

.hud .center {
    text-align: center;
}

#message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    padding: 20px 40px;
    border: 2px solid #fff;
    font-size: 24px;
    text-align: center;
    pointer-events: auto;
}

#message.hidden {
    display: none;
}

#controls-hint {
    position: absolute;
    bottom: -40px;
    left: 0;
    width: 100%;
    text-align: center;
    font-size: 14px;
    color: #ccc;
}

@media (max-width: 600px) {
    #game-container {
        width: 100vw;
        aspect-ratio: 4 / 3;
    }
    #controls-hint {
        font-size: 12px;
        bottom: -60px;
    }
}