/* Course Viewer Styles - Udemy-inspired layout with left sidebar */

.course-viewer-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background-color: var(--lms-bg-primary);
}

/* Header Section */
.course-viewer-header {
    background-color: var(--lms-bg-primary);
    border-bottom: 1px solid var(--neutral-soft);
    padding: var(--lms-space-4) var(--lms-space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.course-viewer-header-left {
    display: flex;
    align-items: center;
    gap: var(--lms-space-4);
    flex: 1;
    min-width: 0;
}

.course-viewer-header-title {
    font-size: var(--lms-font-size-lg);
    font-weight: var(--lms-font-weight-semibold);
    color: var(--neutral-charcoal);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
}

.course-viewer-header-actions {
    display: flex;
    align-items: center;
    gap: var(--lms-space-2);
    flex-shrink: 0;
}

.course-viewer-header-actions .btn {
    padding: var(--lms-space-1) var(--lms-space-2);
    font-size: var(--lms-font-size-xs);
    border-radius: 4px;
    border: 1px solid var(--neutral-soft);
    background-color: var(--lms-bg-primary);
    color: var(--neutral-charcoal);
    transition: all 0.2s ease;
    min-width: auto;
}

.course-viewer-header-actions .btn i {
    font-size: 0.875rem;
}

.course-viewer-header-actions .btn:hover {
    background-color: var(--neutral-whisper);
    border-color: var(--primary-royal);
    color: var(--primary-royal);
}

.course-viewer-header-actions .btn.active {
    background-color: var(--primary-royal);
    border-color: var(--primary-royal);
    color: white;
}

/* Main Content Area */
.course-viewer-main {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Sidebar */
.course-viewer-sidebar {
    width: 320px;
    background-color: var(--neutral-pearl);
    border-right: 1px solid var(--neutral-soft);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, width 0.3s ease;
    overflow: hidden;
    flex-shrink: 0;
    z-index: 10;
}

.course-viewer-sidebar.collapsed {
    width: 60px;
}

.course-viewer-sidebar-header {
    padding: var(--lms-space-4);
    border-bottom: 1px solid var(--neutral-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    background-color: var(--lms-bg-primary);
}

.course-viewer-sidebar-title {
    font-size: var(--lms-font-size-base);
    font-weight: var(--lms-font-weight-semibold);
    color: var(--neutral-charcoal);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-viewer-sidebar.collapsed .course-viewer-sidebar-title {
    display: none;
}

.course-viewer-sidebar-toggle {
    background: none;
    border: none;
    color: var(--neutral-slate);
    cursor: pointer;
    padding: var(--lms-space-2);
    border-radius: 4px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.course-viewer-sidebar-toggle:hover {
    background-color: var(--neutral-whisper);
    color: var(--primary-royal);
}

.course-viewer-sidebar-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--lms-space-2);
}

.course-viewer-sidebar.collapsed .course-viewer-sidebar-content {
    padding: var(--lms-space-2);
}

/* Module Section */
.course-viewer-module {
    margin-bottom: var(--lms-space-2);
    border: 1px solid var(--neutral-soft);
    border-radius: 6px;
    background-color: var(--lms-bg-primary);
    overflow: hidden;
}

.course-viewer-module-header {
    padding: var(--lms-space-3) var(--lms-space-4);
    background-color: var(--neutral-whisper);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background-color 0.2s ease;
    user-select: none;
}

.course-viewer-module-header:hover {
    background-color: var(--neutral-soft);
}

.course-viewer-module-header-content {
    display: flex;
    align-items: center;
    gap: var(--lms-space-2);
    flex: 1;
    min-width: 0;
}

.course-viewer-module-icon {
    color: var(--primary-royal);
    font-size: var(--lms-font-size-sm);
    transition: transform 0.2s ease;
}

.course-viewer-module.expanded .course-viewer-module-icon {
    transform: rotate(90deg);
}

.course-viewer-module-title {
    font-size: var(--lms-font-size-sm);
    font-weight: var(--lms-font-weight-semibold);
    color: var(--neutral-charcoal);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-viewer-sidebar.collapsed .course-viewer-module-title {
    display: none;
}

.course-viewer-module-count {
    font-size: var(--lms-font-size-xs);
    color: var(--neutral-slate);
    background-color: var(--neutral-soft);
    padding: 2px 6px;
    border-radius: 12px;
    margin-left: auto;
}

.course-viewer-sidebar.collapsed .course-viewer-module-count {
    display: none;
}

.course-viewer-module-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.course-viewer-module.expanded .course-viewer-module-content {
    max-height: 5000px;
}

.course-viewer-module-lessons {
    padding: var(--lms-space-2);
}

/* Lesson Item */
.course-viewer-lesson-item {
    padding: var(--lms-space-3) var(--lms-space-4);
    margin-bottom: var(--lms-space-1);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--lms-space-3);
    position: relative;
    border: 1px solid transparent;
}

.course-viewer-lesson-item:hover {
    background-color: var(--neutral-whisper);
    border-color: var(--neutral-soft);
}

.course-viewer-lesson-item.active {
    background-color: var(--primary-royal);
    color: white;
    border-color: var(--primary-royal-dark);
}

.course-viewer-lesson-item.active .course-viewer-lesson-icon,
.course-viewer-lesson-item.active .course-viewer-lesson-title,
.course-viewer-lesson-item.active .course-viewer-lesson-duration {
    color: white;
}

.course-viewer-lesson-item.completed {
    background-color: var(--secondary-gold-muted);
}

.course-viewer-lesson-item.completed .course-viewer-lesson-icon {
    color: var(--secondary-gold);
}

.course-viewer-lesson-icon {
    color: var(--neutral-slate);
    font-size: var(--lms-font-size-base);
    flex-shrink: 0;
    width: 20px;
    text-align: center;
}

.course-viewer-lesson-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--lms-space-1);
}

.course-viewer-sidebar.collapsed .course-viewer-lesson-content {
    display: none;
}

.course-viewer-lesson-title {
    font-size: var(--lms-font-size-sm);
    font-weight: var(--lms-font-weight-medium);
    color: var(--neutral-charcoal);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.course-viewer-lesson-duration {
    font-size: var(--lms-font-size-xs);
    color: var(--neutral-slate);
}

.course-viewer-lesson-badge {
    font-size: var(--lms-font-size-xs);
    padding: 2px 6px;
    border-radius: 12px;
    background-color: var(--primary-royal-light);
    color: white;
    margin-left: auto;
    flex-shrink: 0;
}

.course-viewer-sidebar.collapsed .course-viewer-lesson-badge {
    display: none;
}

/* Standalone Lessons (no module) */
.course-viewer-standalone-lessons {
    margin-bottom: var(--lms-space-4);
}

.course-viewer-standalone-lessons-title {
    font-size: var(--lms-font-size-sm);
    font-weight: var(--lms-font-weight-semibold);
    color: var(--neutral-slate);
    padding: var(--lms-space-2) var(--lms-space-4);
    margin-bottom: var(--lms-space-2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.course-viewer-sidebar.collapsed .course-viewer-standalone-lessons-title {
    display: none;
}

/* Content Area */
.course-viewer-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    background-color: var(--lms-bg-primary);
    display: flex;
    flex-direction: column;
}

.course-viewer-content-body {
    flex: 1;
    padding: var(--lms-space-6);
}

.course-viewer-content-footer {
    padding: var(--lms-space-4) var(--lms-space-6);
    border-top: 1px solid var(--neutral-soft);
    background-color: var(--lms-bg-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.course-viewer-nav-button {
    padding: var(--lms-space-3) var(--lms-space-5);
    border-radius: 6px;
    font-weight: var(--lms-font-weight-medium);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: var(--lms-space-2);
}

.course-viewer-nav-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.course-viewer-progress-indicator {
    text-align: center;
    color: var(--neutral-slate);
    font-size: var(--lms-font-size-sm);
}

/* Progress Bar */
.course-viewer-progress-bar {
    height: 4px;
    background-color: var(--neutral-soft);
    border-radius: 2px;
    overflow: hidden;
    margin: var(--lms-space-2) 0;
}

.course-viewer-progress-fill {
    height: 100%;
    background-color: var(--secondary-gold);
    transition: width 0.3s ease;
    border-radius: 2px;
}

/* Responsive Design */
@media (max-width: 992px) {
    .course-viewer-sidebar {
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    }

    .course-viewer-sidebar.open {
        transform: translateX(0);
    }

    .course-viewer-sidebar.collapsed {
        width: 320px;
        transform: translateX(-100%);
    }

    .course-viewer-sidebar.collapsed.open {
        transform: translateX(0);
    }

    .course-viewer-content {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .course-viewer-header {
        padding: var(--lms-space-3) var(--lms-space-4);
    }

    .course-viewer-header-title {
        font-size: var(--lms-font-size-base);
    }

    .course-viewer-content-body {
        padding: var(--lms-space-4);
    }

    .course-viewer-content-footer {
        padding: var(--lms-space-3) var(--lms-space-4);
        flex-direction: column;
        gap: var(--lms-space-2);
    }

    .course-viewer-nav-button {
        width: 100%;
        justify-content: center;
    }
}

/* Overlay for mobile sidebar */
.course-viewer-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 5;
    transition: opacity 0.3s ease;
}

@media (max-width: 992px) {
    .course-viewer-overlay.show {
        display: block;
    }
}

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

/* Video Player Styles */
.video-player {
    width: 100%;
}

.video-container {
    width: 100%;
    max-width: 100%;
}

.video-wrapper {
    width: 100%;
    position: relative;
    background-color: #000;
}

.video-element {
    width: 100%;
    height: auto;
    max-width: 100%;
    display: block;
}

.video-placeholder {
    width: 100%;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--neutral-whisper);
    border-radius: 8px;
}

.video-placeholder-content {
    text-align: center;
    padding: var(--lms-space-6);
}

.video-actions {
    display: flex;
    gap: var(--lms-space-2);
    flex-wrap: wrap;
}

.course-viewer-sidebar-content::-webkit-scrollbar-track,
.course-viewer-content::-webkit-scrollbar-track {
    background: var(--neutral-whisper);
}

.course-viewer-sidebar-content::-webkit-scrollbar-thumb,
.course-viewer-content::-webkit-scrollbar-thumb {
    background: var(--neutral-slate);
    border-radius: 4px;
}

.course-viewer-sidebar-content::-webkit-scrollbar-thumb:hover,
.course-viewer-content::-webkit-scrollbar-thumb:hover {
    background: var(--primary-royal);
}