body,
html {
    margin: 0;
    padding: 0;
    background: #0b0f12;
    overflow: hidden;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

canvas {
    background: #000;
    display: block;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.7);
}

#hud {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    gap: 30px;
    padding: 8px 25px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    color: white;
    font-size: 18px;
    pointer-events: none;
    user-select: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

#hud b {
    color: #4CAF50;
}

#hudScore {
    color: #fff !important;
}

#hudLives {
    color: #ff4b4b !important;
}

#hudWave {
    color: #00e5ff !important;
}