body{
    background-image: url("/anh-nen-mau-xanh-la-cay-cute-dep_032126967.jpg");
    background-size: cover;
    
    color: #140101;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
}

h1, h2, button {
    text-align: center;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

button {
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    border-radius: 5px;
    background-color: #4CAF50;
    color: rgb(8, 1, 1);
    cursor: pointer;
    transition: background-color 0.3s ease;
    animation: bounce 1s infinite; 
}

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

#moThiep{
    background-image: url("/istockphoto-545240218-612x612.jpg");
    background-size: cover;
    background-position:center;
}

#myDialog{
    background-image: url("/hinh-nen-powerpoint-dep-nhat-2.jpg");
    background-size: cover;
    background-position:center;
}