* {
    box-sizing: border-box;
}

/* General Styling */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #376ea4;
    text-align: center;
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 800px;
    margin: 50px auto;
    padding: 20px;
    background: #072645;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Heading */
h1 {
    font-size: 32px;
    color: #008374;
    margin-bottom: 10px;
}

p {
    font-size: 18px;
    color: #555;
    margin-bottom: 20px;
}

/* Button Container */
.button-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

/* Buttons */
.button {
    text-decoration: none;
    padding: 12px 20px;
    font-size: 16px;
    font-weight: bold;
    color: white;
    background-color: #008374;
    border-radius: 8px;
    transition: background 0.3s ease;
}

.button:hover {
    background-color: #00695c;
}

/* Back Button */
.button:last-child {
    background-color: #333;
}

.button:last-child:hover {
    background-color: #222;
}

/* Modal (For Future Enhancements) */
#chapterModal {
    display: none;
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.close {
    cursor: pointer;
    font-size: 20px;
    color: #888;
}

.close:hover {
    color: #555;
}