body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #000;
    font-family: Arial, sans-serif;
    position: relative;
}

.game-container {
    text-align: center;
}

canvas {
    border: 2px solid #ffffff;
    background-color: #000000;
}

button {
    margin-top: 10px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    background-color: #4CAF50; /* Green */
    color: white;
    border: none;
    border-radius: 12px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #45a049;
}

#score {
    margin-top: 10px;
    font-size: 18px;
    color: white;
}

#gameOverScreen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(2px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease;
}

#gameOverScreen.visible {
    opacity: 1;
    visibility: visible;
}

.game-over-content {
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    position: relative;
    backdrop-filter: none;
}

.close-button {
    position: absolute;
    top: -5px;
    right: 0px;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #000000;
}

.close-button:hover {
    color: red;
    background: none;
}

.hidden {
    display: none;
}

/* From Uiverse.io by CYBWEBALI */ 
.btn {
    display: grid;
    position: absolute;
    bottom: 15px;
    right: 15px;
    background: #e3edf7;
    padding: 1.4em;
    border-radius: 10px;
    box-shadow: inset 4px 4px 6px -1px rgba(0,0,0,0.2),
            inset -4px -4px 6px -1px rgba(255,255,255,0.7),
            -0.5px -0.5px 0px rgba(255,255,255,1),
            0.5px 0.5px 0px rgba(0,0,0,0.15),
            0px 12px 10px -10px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0);
    cursor: pointer;
    transition: transform 0.5s;
  }
  
  .btn:hover {
    box-shadow: inset 4px 4px 6px -1px rgba(0,0,0,0.2),
            inset -4px -4px 6px -1px rgba(255,255,255,0.7),
            -0.5px -0.5px 0px rgba(255,255,255,1),
            0.5px 0.5px 0px rgba(0,0,0,0.15),
            0px 12px 10px -10px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.1);
    transform: translateY(0.5em);
    background: #e3edf7;
  }
  
  .btn svg {
    transition: transform 0.5s;
  }
  
  .btn:hover svg {
    transform: scale(0.9);
    fill: #333333;
  }