/* Enhanced Course Content Styling */

.course-content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    background: linear-gradient(135deg, #1e1e2e 0%, #2c3e50 100%);
    min-height: 100vh;
    color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

/* Module Navigation Styling */
.module-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 2rem 0;
    padding: 1rem;
    background: rgba(52, 152, 219, 0.1);
    border-radius: 12px;
    border: 1px solid rgba(52, 152, 219, 0.3);
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: #ffffff !important;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    font-size: 0.95rem;
}

.nav-btn:hover {
    background: linear-gradient(135deg, #2980b9, #1f77b4);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
    color: #ffffff !important;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

.nav-btn.disabled {
    background: rgba(108, 117, 125, 0.7) !important;
    color: rgba(255, 255, 255, 0.9) !important;
    cursor: not-allowed;
    pointer-events: none;
    border: 1px solid rgba(108, 117, 125, 0.5);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.nav-btn i {
    font-size: 0.9rem;
}

/* Typography Enhancements */
.course-content-wrapper h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #3498db;
    margin: 2rem 0 1.5rem 0;
    text-align: center;
    background: linear-gradient(135deg, #3498db, #2ecc71);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.course-content-wrapper h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #2ecc71;
    margin: 2rem 0 1rem 0;
    border-left: 4px solid #2ecc71;
    padding-left: 1rem;
}

.course-content-wrapper h3 {
    font-size: 1.4rem;
    font-weight: 500;
    color: #e74c3c;
    margin: 1.5rem 0 0.75rem 0;
}

.course-content-wrapper h4 {
    font-size: 1.2rem;
    font-weight: 500;
    color: #f39c12;
    margin: 1rem 0 0.5rem 0;
}

/* Paragraph and Text Styling */
.course-content-wrapper p {
    margin: 1rem 0;
    font-size: 1.1rem;
    color: #ecf0f1;
    text-align: justify;
}

.course-content-wrapper strong {
    color: #3498db;
    font-weight: 600;
}

/* List Styling */
.course-content-wrapper ul,
.course-content-wrapper ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.course-content-wrapper li {
    margin: 0.5rem 0;
    color: #ecf0f1;
    font-size: 1.05rem;
}

.course-content-wrapper li::marker {
    color: #3498db;
}

/* Code Block Enhancements - Apply styling only to code content */
.course-content-wrapper pre {
    background: transparent;
    border: none;
    border-radius: 8px;
    padding: 0;
    margin: 1.5rem 0;
    overflow-x: auto;
}

.course-content-wrapper pre code {
    display: block;
    background: #1a1a2e;
    border: 1px solid #3498db;
    border-radius: 8px;
    padding: 1.5rem;
    font-family: 'Fira Code', 'Consolas', 'Monaco', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
    color: #f8f9fa;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    overflow-x: auto;
}

.course-content-wrapper p code {
    display: inline;
    background: rgba(52, 152, 219, 0.2);
    color: #3498db;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9rem;
    border: none;
    box-shadow: none;
}

/* Table Styling */
.course-content-wrapper table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: rgba(44, 62, 80, 0.5);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.course-content-wrapper th,
.course-content-wrapper td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(52, 152, 219, 0.3);
}

.course-content-wrapper th {
    background: rgba(52, 152, 219, 0.2);
    color: #3498db;
    font-weight: 600;
}

.course-content-wrapper tr:hover {
    background: rgba(52, 152, 219, 0.1);
}

/* Blockquote Styling */
.course-content-wrapper blockquote {
    border-left: 4px solid #f39c12;
    background: rgba(243, 156, 18, 0.1);
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: #f39c12;
}

/* Link Styling */
.course-content-wrapper a {
    color: #3498db;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}

.course-content-wrapper a:hover {
    color: #2ecc71;
    border-bottom-color: #2ecc71;
}

/* Knowledge Checkpoint Styling */
.course-content-wrapper h2#knowledge-checkpoint + ul {
    background: rgba(46, 204, 113, 0.1);
    border: 1px solid rgba(46, 204, 113, 0.3);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
}

.course-content-wrapper h2#knowledge-checkpoint + ul li {
    color: #2ecc71;
    font-weight: 500;
}

/* Exercise Styling */
.course-content-wrapper h2#practical-exercise,
.course-content-wrapper h3[id*="exercise"] {
    color: #e74c3c;
}

.course-content-wrapper h2#practical-exercise + h3 + ol,
.course-content-wrapper h3[id*="exercise"] + ol {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.3);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .course-content-wrapper {
        padding: 1rem;
    }
    
    .course-content-wrapper h1 {
        font-size: 2rem;
    }
    
    .course-content-wrapper h2 {
        font-size: 1.5rem;
    }
    
    .module-navigation {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-btn {
        width: 100%;
        justify-content: center;
    }
    
    .course-content-wrapper pre {
        padding: 1rem;
        font-size: 0.85rem;
    }
    
    .course-content-wrapper table {
        font-size: 0.9rem;
    }
    
    .course-content-wrapper th,
    .course-content-wrapper td {
        padding: 0.75rem;
    }
}

/* Print Styles */
@media print {
    .course-content-wrapper {
        background: white;
        color: black;
        padding: 1rem;
    }
    
    .module-navigation {
        display: none;
    }
    
    .course-content-wrapper h1,
    .course-content-wrapper h2,
    .course-content-wrapper h3 {
        color: black;
    }
    
    .course-content-wrapper pre {
        background: #f5f5f5;
        border: 1px solid #ddd;
    }
}

/* Accessibility Enhancements */
.course-content-wrapper:focus-within {
    outline: 2px solid #3498db;
    outline-offset: 4px;
}

.nav-btn:focus {
    outline: 2px solid #2ecc71;
    outline-offset: 2px;
}

/* Animation for smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading animation for dynamic content */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(52, 152, 219, 0.3);
    border-radius: 50%;
    border-top-color: #3498db;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}