* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: sans-serif;
    font-size: 16px;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f0f0f0;
}

.container {
    text-align: center;
    padding: 20px;
    border-radius: 10px;
    background-color: white;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h1 {
    margin-bottom: 20px;
    color: #333;
}

button {
    padding: 10px 20px;
    font-size: 18px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: #4CAF50;
    color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: background-color 0.3s;
}

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

#menu {
    margin-top: 20px;
    font-size: 24px;
    color: #555;
    font-weight: bold;
    animation: fadeIn 0.5s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}