canvas {
    border: 10px solid #00FFFF; /* neon cyan border */
    background-color: #0D0D0D; /* deep black canvas */
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.6);
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background: linear-gradient(135deg, #0D0D0D, #2E0854); 
    font-family: 'Arial', sans-serif; 
    color: #FFFFFF; 
}

h1 {
    font-family: 'Poppins', sans-serif;
    color: #39FF14; /* neon green title */
    text-shadow: 0 0 10px #39FF14, 0 0 20px #39FF14;
    margin-bottom: 20px;
}

#gameOverBox {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.9);
    padding: 30px;
    border: 3px solid #00FFFF; /* neon cyan border */
    border-radius: 10px;
    text-align: center;
    color: #FFFF33; /* neon yellow text */
    font-family: Arial, sans-serif;
    z-index: 10;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.8);
}

#gameOverBox button {
    margin-top: 10px;
    padding: 10px 20px;
    background: #FF10F0; /* neon magenta button */
    border: none;
    color: white;
    font-weight: bold;
    cursor: pointer;
    border-radius: 5px;
    transition: background 0.3s ease;
    box-shadow: 0 0 10px #FF10F0;
}
#gameOverBox button:hover {
    background: #C000C0;
}