/* Base Styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #f9f9f9;
    color: #333;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    width: 90%;
}

h1 {
    text-align: center;
    font-size: 2rem;
    color: #4CAF50;
}

/* Back to Top Button */
#backToTop {
    display: none; /* Hidden by default */
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1002;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 50%;
    padding: 12px 16px;
    font-size: 20px;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
    transition: opacity 0.3s ease;
}

#backToTop:hover {
    background-color: #388E3C;
}

/* Responsive Base Styles */
@media (max-width: 600px) {
    body {
        font-size: 14px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .container {
        padding: 10px;
    }
}