/* General Styles */
body {
    font-family: 'Lato', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    margin: 0;
    padding: 0;
    background-color: #f4f7f6; /* Light calming background for overall page */
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', Arial, sans-serif;
    color: #2c3e50; /* Dark blue-grey for headings */
}

p {
    margin-bottom: 1em;
    font-size: 1.05em; /* Slightly larger for readability */
}

a {
    color: #3498db; /* Standard link blue */
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

/* FullPage.js Section Styling */
.section {
    text-align: left;
    padding: 20px 40px 80px 40px; /* Add bottom padding for nav buttons */
    background-color: #ffffff; /* White background for content sections */
    box-sizing: border-box;
    overflow-y: auto; /* Allow scrolling within a section if content overflows */
}

.section .fp-scrollable {
    padding-bottom: 60px; /* Ensure space for nav buttons if content scrolls */
}


.section h1 {
    font-size: 2.2em;
    margin-top: 20px;
    margin-bottom: 20px;
    color: #2980b9; /* Calming blue for lesson titles */
}

.section h2 {
    font-size: 1.8em;
    margin-top: 30px;
    margin-bottom: 15px;
    color: #16a085; /* Calming green for subheadings */
}

.section ul, .section ol {
    margin-bottom: 1em;
    padding-left: 20px;
}

.section li {
    margin-bottom: 0.5em;
}

.section strong {
    color: #2c3e50;
}

.section .actionable-steps {
    background-color: #e8f6f3;
    border-left: 4px solid #1abc9c;
    padding: 15px;
    margin-top: 20px;
    border-radius: 4px;
}

.section .actionable-steps h3 {
    margin-top: 0;
    color: #16a085;
}

/* Progress Bar */
#progress-bar-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 8px;
    background-color: #e0e0e0; /* Light grey background for the container */
    z-index: 100; /* Ensure it's above fullPage.js content */
}

#progress-bar {
    height: 100%;
    width: 0%; /* Initial width */
    background-color: #27ae60; /* Green progress color */
    transition: width 0.3s ease-in-out;
}

/* Custom Navigation Buttons */
#custom-navigation {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    gap: 15px;
}

.nav-button {
    padding: 12px 25px;
    font-family: 'Montserrat', Arial, sans-serif;
    font-size: 1em;
    color: white;
    background-color: #3498db; /* Blue for navigation */
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease, opacity 0.3s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.nav-button:hover {
    background-color: #2980b9; /* Darker blue on hover */
}

.nav-button:disabled {
    background-color: #bdc3c7; /* Grey when disabled */
    cursor: not-allowed;
    opacity: 0.7;
}

#prev-lesson {
    /* Specific styles if needed */
}

#next-lesson {
    background-color: #2ecc71; /* Green for next, more prominent */
}

#next-lesson:hover {
    background-color: #27ae60; /* Darker green on hover */
}

/* Quiz Styling */
.quiz-container {
    margin-top: 30px;
    padding: 20px;
    background-color: #f9f9f9; /* Slightly different background for quiz */
    border: 1px solid #ddd;
    border-radius: 8px;
}

.quiz-container h3 {
    margin-top: 0;
    color: #2c3e50;
    text-align: center;
    margin-bottom: 20px;
}

.quiz-question {
    margin-bottom: 25px;
}

.quiz-question p {
    font-weight: bold;
    margin-bottom: 10px;
}

.quiz-options label {
    display: block;
    margin-bottom: 8px;
    padding: 10px;
    background-color: #fff;
    border: 1px solid #eee;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.quiz-options label:hover {
    background-color: #eaf2f8;
}

.quiz-options input[type="radio"] {
    margin-right: 10px;
    vertical-align: middle;
}

.quiz-feedback {
    margin-top: 10px;
    padding: 10px;
    border-radius: 4px;
    font-weight: bold;
}

.quiz-feedback.correct {
    background-color: #d4efdf; /* Light green for correct */
    color: #145a32;
    border-left: 4px solid #27ae60;
}

.quiz-feedback.incorrect {
    background-color: #fdedec; /* Light red for incorrect */
    color: #c0392b;
    border-left: 4px solid #e74c3c;
}

#submit-quiz-button {
    display: block;
    margin: 20px auto 0;
    padding: 10px 20px;
    font-family: 'Montserrat', Arial, sans-serif;
    font-size: 1em;
    color: white;
    background-color: #e67e22; /* Orange for submit */
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#submit-quiz-button:hover {
    background-color: #d35400; /* Darker orange */
}

#submit-quiz-button:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}


/* Placeholder image styling (if any images are added later) */
.content-image-placeholder {
    display: block;
    width: 80%;
    max-width: 400px; /* Limit max width of placeholders */
    height: auto;
    margin: 20px auto; /* Center placeholders */
    background-color: #ecf0f1; /* Light grey for placeholder */
    border: 1px dashed #bdc3c7; /* Dashed border */
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #7f8c8d;
    font-style: italic;
    padding: 20px;
    box-sizing: border-box;
}


/* Responsive Design */
@media (max-width: 768px) {
    .section {
        padding: 15px 20px 70px 20px; /* Adjust padding for smaller screens */
    }
    .section h1 {
        font-size: 1.8em;
    }
    .section h2 {
        font-size: 1.5em;
    }
    #custom-navigation {
        bottom: 10px; /* Closer to bottom */
        gap: 10px;
    }
    .nav-button {
        padding: 10px 15px;
        font-size: 0.9em;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 15px; /* Adjust base font for very small screens */
    }
    .section {
        padding: 10px 15px 60px 15px;
    }
    .section h1 {
        font-size: 1.6em;
    }
    .section h2 {
        font-size: 1.3em;
    }
    p {
        font-size: 1em;
    }
    #progress-bar-container {
        height: 6px;
    }
}

/* Specific styles for index.html (copied from its inline styles for consistency if needed, but better to keep separate or use common classes) */
/* Styles for index.html are primarily in index.html itself for simplicity as it's static */
/* However, if common elements are shared, they can be defined here */
.container { /* Used in index.html */
    width: 80%;
    max-width: 900px;
    margin: 40px auto;
    padding: 30px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

/* Ensure fullPage.js related styles don't conflict if this CSS is loaded on index.html too */
.fp-enabled body, .fp-enabled html {
    margin: 0;
    padding: 0;
    overflow:hidden; /* Important for fullPage.js */
}