body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #bfbfbf;
    color: #111;
    display: flex;
    flex-direction: column;
    align-items: center
}

header {
    width: 100%;
    padding: 8px;
    background: #111;
    color: #fff;
    text-align: center
}

canvas {
    background: #e0e0e0;
    margin: 12px;
    border: 6px solid #000;
    border-radius: 6px
}

#hud {
    display: flex;
    gap: 12px;
    margin-bottom: 8px
}

#modal.hidden {
    display: none
}

#modal {
    position: fixed;
    inset: 0;
    display: grid;
    place-items: center;
    background: rgba(0, 0, 0, 0.6)
}

#modal-content {
    background: #fff;
    padding: 18px;
    border-radius: 8px
}