body {
    font-family: Arial, sans-serif;
    background-color: #3c964e;
    color: #333;
    margin: 20px;
    line-height: 1.6;
}

/* Main Heading */
h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 20px;
}

/* Paragraphs */
p {
    max-width: 600px;
    margin: 10px auto;
    font-size: 20px;
}


.chapter-container {
    display: flex;
    justify-content: center;
    gap: 40px; 
    flex-wrap: wrap; 
}

.chapter {
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 2px 5px rgba(0,0,0,0.1);
    min-width: 300px;
}


.chapter h3 {
    text-align: center;
    color: #34495e;
    margin-bottom: 15px;
}


a {
    display: block;
    margin: 5px 0;
    text-decoration: none;
    color: #2980b9;
    font-weight: bold;
}

a:hover {
    color: #1c5980;
    text-decoration: underline;
}

button {
    padding: 8px 15px;
    margin: 5px 0;
    background-color: #27ae60;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #1e8449;
}


input[type="text"],
input[type="number"] {
    padding: 5px 10px;
    margin: 5px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
    width: 50%;
}

input:focus {
    border-color: #2980b9;
    outline: none;
}

ul {
    list-style-type: disc;
    margin: 5px 0 15px 20px;
}

li {
    margin: 5px 0;
}

img {
    display: block;
    margin: 10px auto;
    border-radius: 5px;
}

@media (max-width: 700px) {
    .chapter-container {
        flex-direction: column;
        align-items: center;
    }
}