body {
    background-color: black;
    color: white;
    font-family: Arial, sans-serif;
    text-align: center;
    padding-top: 20px;
}

.results {
    font-size: 2rem;
    margin-bottom: 15px;
}

.grid {
    width: 600px;
    height: 600px;
    border: solid 3px white;
    display: flex;
    flex-wrap: wrap;
    margin: auto;
    background-color: #111;
}

.grid div {
    width: 40px;
    height: 40px;
}

.invader {
    background-color: purple;
    border-radius: 8px;
    box-shadow: 0 0 10px magenta;
}

.shooter {
    background-color: limegreen;
    box-shadow: 0 0 10px greenyellow;
}

.laser {
    background-color: orange;
    box-shadow: 0 0 5px gold;
}

.boom {
    background-color: red;
    box-shadow: 0 0 10px orange;
}

#resetBtn {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 1rem;
    background-color: #444;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

#resetBtn:hover {
    background-color: #666;
}