/* ===================================
   Content Modal Styles
   =================================== */

.content-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.content-modal.active {
    display: block;
    opacity: 1;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
}

.modal-container {
    position: relative;
    width: 95%;
    height: 95%;
    max-width: 1400px;
    margin: 2.5% auto;
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    display: grid;
    grid-template-rows: auto 1fr;
    grid-template-columns: 280px 1fr;
    overflow: hidden;
    animation: modalSlideIn 0.4s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(50px) scale(0.95);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

/* Modal Header */
.modal-header {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    gap: var(--spacing-md);
}

.modal-title {
    flex: 1;
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
}

.modal-nav-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-base);
}

.modal-nav-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateX(5px);
}

#modalPrev:hover {
    transform: translateX(-5px);
}

.modal-close {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

/* Modal Sidebar */
.modal-sidebar {
    padding: var(--spacing-xl);
    background: var(--gray-50);
    overflow-y: auto;
    border-right: 1px solid var(--border);
}

.modal-toc h3 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: 1.125rem;
    color: var(--text-primary);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-item {
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.toc-item:hover {
    background: white;
    color: var(--primary);
    transform: translateX(5px);
}

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

.toc-item.lab-toc {
    background: rgba(16, 185, 129, 0.1);
    border-left: 3px solid var(--success);
}

.toc-item.lab-toc.active {
    background: linear-gradient(135deg, var(--success), #059669);
    border-left-color: var(--success);
}

/* Modal Content */
.modal-content {
    padding: var(--spacing-xl);
    overflow-y: auto;
    background: white;
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

/* Overview Styles */
.content-overview {
    animation: fadeInUp 0.6s ease;
}

.overview-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--gray-200);
}

.overview-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.overview-description {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    border-left: 4px solid var(--primary);
}

.overview-description p {
    font-size: 1.125rem;
    line-height: 1.7;
    margin: 0;
    color: var(--text-primary);
}

.overview-sections,
.overview-labs {
    margin-bottom: var(--spacing-xl);
}

.overview-sections h2,
.overview-labs h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.section-list,
.lab-list {
    display: grid;
    gap: var(--spacing-md);
}

.section-item,
.lab-item {
    background: white;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.section-item:hover,
.lab-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.section-item h3,
.lab-item h3 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
}

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

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

.lab-item p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.lab-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Section Content */
.section-content {
    animation: fadeInUp 0.6s ease;
}

.content-body {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.content-body h1 {
    font-size: 2.5rem;
    margin: var(--spacing-xl) 0 var(--spacing-lg);
    color: var(--text-primary);
    border-bottom: 3px solid var(--primary);
    padding-bottom: var(--spacing-sm);
}

.content-body h2 {
    font-size: 1.875rem;
    margin: var(--spacing-xl) 0 var(--spacing-md);
    color: var(--text-primary);
}

.content-body h3 {
    font-size: 1.5rem;
    margin: var(--spacing-lg) 0 var(--spacing-md);
    color: var(--primary);
}

.content-body p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.content-body ul,
.content-body ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

.content-body li {
    margin-bottom: var(--spacing-xs);
}

.content-body strong {
    color: var(--primary);
    font-weight: 600;
}

.content-body code {
    background: var(--gray-100);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-family: var(--font-mono);
    font-size: 0.9em;
    color: var(--primary);
}

.content-body pre {
    background: var(--gray-900);
    color: var(--gray-100);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
    position: relative;
}

.content-body pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: 0.9rem;
    line-height: 1.6;
}

.code-copy-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.content-body pre:hover .code-copy-btn {
    opacity: 1;
}

.code-copy-btn:hover {
    background: var(--primary-dark);
}

/* Lab Content */
.lab-content {
    animation: fadeInUp 0.6s ease;
}

.lab-header-detail {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--gray-200);
}

.lab-header-detail h1 {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.lab-badges {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.badge {
    padding: 0.5rem 1rem;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
}

.badge-duration {
    background: var(--gray-100);
    color: var(--text-primary);
}

.badge-difficulty {
    background: var(--primary);
    color: white;
}

.lab-objective,
.lab-prerequisites,
.lab-setup,
.lab-code,
.lab-tasks,
.lab-outcomes {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--primary);
}

.lab-objective {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
}

.lab-setup {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(5, 150, 105, 0.05));
    border-left-color: var(--success);
}

.lab-code {
    background: var(--gray-50);
}

.lab-objective h2,
.lab-prerequisites h2,
.lab-setup h2,
.lab-code h2,
.lab-tasks h2,
.lab-outcomes h2 {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
    color: var(--text-primary);
}

.lab-tasks .task-list {
    list-style: none;
    padding: 0;
}

.lab-tasks .task-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: white;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xs);
    transition: all var(--transition-base);
}

.lab-tasks .task-list li:hover {
    background: var(--gray-50);
}

.lab-tasks .task-list input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.lab-tasks .task-list label {
    flex: 1;
    cursor: pointer;
}

.lab-tasks .task-list input[type="checkbox"]:checked + label {
    text-decoration: line-through;
    opacity: 0.6;
}

/* Button Styles */
.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Scrollbar */
.modal-sidebar::-webkit-scrollbar,
.modal-content::-webkit-scrollbar {
    width: 8px;
}

.modal-sidebar::-webkit-scrollbar-track,
.modal-content::-webkit-scrollbar-track {
    background: var(--gray-100);
}

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

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

/* Responsive */
@media (max-width: 1024px) {
    .modal-container {
        grid-template-columns: 1fr;
        width: 100%;
        height: 100%;
        margin: 0;
        border-radius: 0;
    }

    .modal-sidebar {
        display: none;
    }

    .modal-header {
        padding: var(--spacing-md);
    }

    .modal-title {
        font-size: 1.25rem;
    }

    .modal-nav-btn {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.875rem;
    }
}

@media (max-width: 768px) {
    .modal-header {
        flex-wrap: wrap;
    }

    .modal-title {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }

    .content-body {
        font-size: 1rem;
    }

    .content-body h1 {
        font-size: 2rem;
    }

    .content-body h2 {
        font-size: 1.5rem;
    }

    .content-body pre {
        padding: var(--spacing-md);
        font-size: 0.85rem;
    }
}

/* Loading State */
.modal-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}