html, body {
  margin: 0;
  padding: 0;
}
canvas {
  display: block;
}

#tutorial {
    position: fixed;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    display: none;
    max-width: 400px;
}

#tutorial h2 {
    margin: 0;
    font-size: 20px;
}

#tutorial ul {
    list-style: none;
    padding: 0;
    text-align: left;
}

#tutorial ul li {
    margin: 5px 0;
}

#tutorial button {
    background: #ff5555;
    color: white;
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    margin-top: 10px;
}

#openTutorialBtn {
    position: fixed;
    top: 10px;
    right: 10px;
    background: #007bff;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
}

#homeButton {
    position: fixed;
    top: 10px;
    left: 10px;
    background: #28a745;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

#homeButton:hover {
    background: #218838;
}