body {
    margin: 0;
    background: #222;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

/* Game container */
.game-wrapper {
    position: relative;
    background: #70c5ce;
    border-radius: 12px;
    box-shadow: 0 0 25px rgba(0, 0, 0, 0.6);
}

/* Canvas */
canvas {
    display: block;
    background: #70c5ce;
    border-radius: 12px;
}

/* Restart button */
#restartBtn {
    display: none;
    position: absolute;
    left: 50%;
    top: 70%;
    transform: translateX(-50%);
    padding: 12px 22px;
    font-size: 18px;
    background: #ff4444;
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
}

/* MOBILE */
@media (max-width: 768px) {
    body {
        background: #70c5ce;
    }

    .game-wrapper {
        width: 100vw;
        height: 100vh;
        border-radius: 0;
    }

    canvas {
        width: 100vw;   /* ✅ only width */
        border-radius: 0;
    }
}