/* Reset some default browser styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Style for the body */
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 20px;
}

/* Style for the header */
header {
    background: #4CAF50;
    color: white;
    padding: 10px 0;
    text-align: center;
    margin-bottom: 20px;
}

/* Style for the footer */
footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    width: 100%;
    bottom: 0;
}

/* Style for the main content */
main {
    margin-bottom: 60px; /* To avoid overlap with the footer */
}

/* Style for sections */
section {
    background: #f4f4f4;
    padding: 20px;
    margin: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
}

/* Style for the lessons list */
ul {
    list-style: none;
    padding: 0;
}

li {
    margin: 10px 0;
}

a {
    text-decoration: none;
    color: #000;
}

a:hover {
    text-decoration: underline;
}

.disabled a {
    color: #aaa;
    pointer-events: none;
}

/* Text styling */
h1, h2 {
    margin-bottom: 10px;
}

p {
    margin-bottom: 10px;
}

/* Specific styles for lesson1.html */

/* Text styling examples */
.text-sample {
    color: #333;
    font-size: 18px;
    font-family: 'Georgia', serif;
    font-weight: bold;
}

.text-color {
    color: red;
}

.text-size {
    font-size: 24px;
}

.text-family {
    font-family: Arial, sans-serif;
}

.text-bold {
    font-weight: bold;
}

/* Block styling example */
.block-sample {
    width: 300px;
    height: 200px;
    padding: 20px;
    border: 2px solid #4CAF50;
    margin: 20px 0;
    background-color: #e7f4e4;
}