/* ===================================
   Course Page Specific Styles
   =================================== */

/* Course Header */
.course-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 6rem 0 3rem;
    margin-top: 70px;
}

.course-header-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.course-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.course-subtitle {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    opacity: 0.9;
    margin-top: var(--spacing-sm);
}

.course-description {
    font-size: 1.25rem;
    opacity: 0.95;
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.course-meta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
}

.meta-icon {
    font-size: 1.5rem;
}

/* Course Layout */
.course-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
}

/* Sidebar */
.course-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.sidebar-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--gray-100);
}

.sidebar-header h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.progress-indicator {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm);
    background: var(--gray-50);
    border-radius: var(--radius-md);
}

.progress-ring {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.nav-section h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.nav-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-size: 0.95rem;
}

.nav-item:hover {
    background: var(--gray-50);
    color: var(--primary);
    transform: translateX(5px);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-weight: 600;
}

.nav-item.completed {
    opacity: 0.7;
}

.nav-item.completed::before {
    content: '✓ ';
    color: var(--success);
}

/* Main Content */
.course-content {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
}

.content-section {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--gray-100);
}

.content-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gray-100);
    color: var(--primary);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.content-section h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.content-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    margin-top: var(--spacing-xl);
    color: var(--text-primary);
}

/* Content Cards */
.content-card {
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--primary);
}

.content-card h3 {
    margin-top: 0;
}

.checklist {
    list-style: none;
    padding: 0;
}

.checklist li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-xl);
    position: relative;
}

.checklist li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
    font-size: 1.25rem;
}

.highlight-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border: 2px solid var(--primary);
}

.highlight-box h3 {
    color: var(--primary);
    margin-top: 0;
}

/* Methodology Grid */
.methodology-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.method-card {
    text-align: center;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.method-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.method-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.method-card h3 {
    margin: 0 0 var(--spacing-sm) 0;
}

/* Week Sections */
.week-section {
    background: linear-gradient(to bottom, var(--gray-50), white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
}

.week-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.week-badge {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: 100px;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.week-section h2 {
    margin-bottom: var(--spacing-md);
}

.week-meta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* Topics Grid */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.topic-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.topic-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-sm);
}

.topic-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.topic-item strong {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.topic-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Lab Cards */
.lab-card {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(5, 150, 105, 0.05));
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-lg) 0;
    border-left: 4px solid var(--success);
}

.lab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.lab-header h3 {
    margin: 0;
    color: var(--success);
}

.lab-duration {
    padding: 0.25rem 0.75rem;
    background: white;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--success);
}

.lab-card h4 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1.25rem;
}

.lab-outcomes {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(16, 185, 129, 0.2);
}

.lab-outcomes ul {
    margin-top: var(--spacing-sm);
}

/* Project Cards */
.project-card {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin: var(--spacing-lg) 0;
    border-left: 4px solid var(--primary);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.project-header h3 {
    margin: 0;
    color: var(--primary);
}

.project-difficulty {
    padding: 0.25rem 0.75rem;
    background: white;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
}

.project-card h4 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1.25rem;
}

.project-tech {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.project-tech span {
    padding: 0.25rem 0.75rem;
    background: white;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
}

/* Technique List */
.technique-list {
    list-style: none;
    padding: 0;
}

.technique-list li {
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    border-left: 3px solid var(--primary);
}

.technique-list strong {
    color: var(--primary);
}

/* Capstone Section */
.capstone-section {
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.1), rgba(99, 102, 241, 0.05));
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
}

.capstone-overview {
    display: flex;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin: var(--spacing-xl) 0;
}

.capstone-stat {
    text-align: center;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    min-width: 150px;
    box-shadow: var(--shadow-md);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 600;
}

.option-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.option-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.option-card h4 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--accent);
}

.option-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.option-features span {
    padding: 0.25rem 0.75rem;
    background: var(--gray-50);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Deliverables */
.deliverables-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.deliverable-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.deliverable-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--gray-50);
    border-radius: var(--radius-md);
}

.deliverable-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.deliverable-item strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.deliverable-item p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Download Section */
.download-section {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
    color: white;
    margin: var(--spacing-2xl) 0;
}

.download-card h3 {
    color: white;
    margin-top: 0;
}

.download-card p {
    opacity: 0.95;
    margin-bottom: var(--spacing-lg);
}

.download-note {
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
    opacity: 0.9;
}

/* CTA Inline */
.cta-inline {
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    text-align: center;
}

.cta-inline h2 {
    margin-bottom: var(--spacing-md);
}

.cta-inline p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .course-layout {
        grid-template-columns: 1fr;
    }

    .course-sidebar {
        position: static;
        max-height: none;
    }

    .methodology-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .topics-grid {
        grid-template-columns: 1fr;
    }

    .deliverable-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .course-header {
        padding: 4rem 0 2rem;
    }

    .course-title {
        font-size: 2rem;
    }

    .course-meta {
        gap: var(--spacing-md);
    }

    .course-content {
        padding: var(--spacing-lg);
    }

    .content-section h2 {
        font-size: 1.75rem;
    }

    .methodology-grid {
        grid-template-columns: 1fr;
    }

    .capstone-overview {
        flex-direction: column;
    }

    .deliverable-grid {
        grid-template-columns: 1fr;
    }

    .cta-buttons {
        flex-direction: column;
    }
}

/* Scrollbar Styling */
.course-sidebar::-webkit-scrollbar {
    width: 8px;
}

.course-sidebar::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 100px;
}

.course-sidebar::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 100px;
}

.course-sidebar::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* Animations */
@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}