body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: #1a1a1a url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="%231a1a1a"/><path d="M0,0 C30,20 70,20 100,0 V100 H0" fill="%23143601" opacity="0.3"/><path d="M20,0 C50,30 50,70 20,100 H0 V0" fill="%23195401" opacity="0.2"/><path d="M80,0 C50,30 50,70 80,100 H100 V0" fill="%23195401" opacity="0.2"/></svg>');
    font-family: Arial, sans-serif;
}

.game-container {
    position: relative;
}

canvas {
    background: rgba(21, 54, 1, 0.8);
    border: 2px solid #2a5902;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.hud {
    position: absolute;
    top: 10px;
    left: 10px;
    color: #fff;
}

.score {
    font-size: 20px;
    margin-bottom: 10px;
}

.stealth-meter {
    display: flex;
    align-items: center;
    gap: 10px;
}

#stealthBar {
    width: 100px;
    height: 10px;
    background: #333;
    border: 1px solid #444;
    position: relative;
}

#stealthBar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: #4CAF50;
    transition: width 0.3s ease;
}