body {
    text-align: center;
    font-family: Arial, sans-serif;
    background-color: #222;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
}

.menu,
.game-over {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgba(255, 255, 255, 0.3);
    display: none;
}

canvas {
    background-color: black;
    margin: 1px auto;
    display: block;
}

button {
    margin: 10px;
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    width: 150px;
}

.easy {
    background-color: green;
    color: white;
}

.medium {
    background-color: orange;
    color: white;
}

.hard {
    background-color: red;
    color: white;
}

.restart {
    background-color: blue;
    color: white;
}

#controls {
    display: none;
    margin-top: 20px;
}

.controls-container {
    display: grid;
    grid-template-columns: repeat(3, 60px);
    gap: 5px;
    justify-content: center;
}

#btnUp {
    grid-column: 2;
}

#btnLeft {
    grid-column: 1;
    grid-row: 2;
}

#btnRight {
    grid-column: 3;
    grid-row: 2;
}

#btnDown {
    grid-column: 2;
    grid-row: 3;
}

.control-button {
    width: 60px;
    height: 60px;
    font-size: 24px;
    border-radius: 50%;
    background-color: gray;
    color: white;
    border: none;
}