html,
    body {
        margin: 0;
        padding: 0;
        background: #0f172a;
        color: #e5e7eb;
        font-family: Arial, Helvetica, sans-serif;
        overflow: hidden;
    width: 100%;
    height: 100%;
    }
canvas {
    display: block;
}
    #game {
        width: 100vw;
        height: 100vh;
    }

    .hud {
        position: fixed;
        left: 400px;
        top: 12px;
        z-index: 10;
        background: rgba(0, 0, 0, 0.45);
        border: 1px solid rgba(255, 255, 255, 0.15);
        border-radius: 10px;
        padding: 10px 12px;
        line-height: 1.4;
        font-size: 14px;
        pointer-events: none;
        max-width: 390px;
    }

    .hud b {
        color: #fff;
    }