/* Course View Page Styles */

.course-view-main {
    min-height: 100vh;
    background: var(--light-gray);
    padding-top: 1rem;
}

/* Video Section */
.video-section {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px var(--shadow-light);
    margin-bottom: 2rem;
}

.video-player-container {
    position: relative;
    background: var(--black);
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-player {
    position: relative;
    width: 100%;
    height: 100%;
}

.video-player video,
.video-player iframe {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-controls-overlay {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 10;
}

.video-controls-overlay select {
    background: rgba(0, 0, 0, 0.8);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.video-controls-overlay select:focus {
    border-color: var(--primary-yellow);
    box-shadow: 0 0 0 0.2rem rgba(249, 176, 0, 0.25);
}

/* Course Info Section */
.course-info-section {
    padding: 2rem;
}

.course-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 1rem;
}

.course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2rem;
    color: var(--medium-gray);
    font-size: 0.9rem;
}

.course-meta span {
    display: flex;
    align-items: center;
}

.course-meta i {
    color: var(--primary-yellow);
}

/* Course Progress */
.course-progress-section {
    background: rgba(249, 176, 0, 0.1);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.progress-header {
    display: flex;
    justify-content: between;
    align-items: center;
    margin-bottom: 1rem;
}

.progress-header h5 {
    margin-bottom: 0;
    color: var(--black);
}

.progress-percentage {
    font-weight: 600;
    color: var(--primary-yellow);
    font-size: 1.1rem;
}

.progress {
    height: 12px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.8);
}

.progress-bar {
    background: linear-gradient(90deg, var(--primary-yellow), #ffcc33);
    border-radius: 6px;
}

.progress-stats {
    color: var(--medium-gray);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* Course Description */
.course-description {
    margin-bottom: 2rem;
}

.course-description h5 {
    color: var(--black);
    margin-bottom: 1rem;
}

.description-content {
    color: var(--medium-gray);
    line-height: 1.6;
    max-height: 100px;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.description-content.expanded {
    max-height: none;
}

.course-description .btn-link {
    color: var(--primary-yellow);
    text-decoration: none;
    font-weight: 600;
}

.course-description .btn-link:hover {
    color: var(--black);
}

/* Course Actions */
.course-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.course-actions .btn {
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
}

/* Instructor Message */
.instructor-message {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border-left: 4px solid var(--primary-yellow);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.message-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.message-header i {
    color: var(--primary-yellow);
    margin-right: 0.5rem;
    font-size: 1.2rem;
}

.message-header h6 {
    margin-bottom: 0;
    color: var(--black);
}

.message-content {
    color: var(--medium-gray);
    line-height: 1.6;
}

/* Comments Section */
.comments-section {
    border-top: 2px solid var(--border-gray);
    padding-top: 2rem;
}

.comments-header {
    display: flex;
    justify-content: between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.comments-header h5 {
    margin-bottom: 0;
    color: var(--black);
}

.add-comment-form {
    background: var(--light-gray);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.comment-item {
    background: var(--white);
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.comment-header {
    display: flex;
    justify-content: between;
    align-items: center;
    margin-bottom: 1rem;
}

.comment-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.comment-author img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.comment-author-info h6 {
    margin-bottom: 0;
    color: var(--black);
}

.comment-author-info small {
    color: var(--medium-gray);
}

.comment-content {
    color: var(--medium-gray);
    line-height: 1.6;
}

/* Sidebar */
.course-sidebar {
    position: sticky;
    top: 100px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.course-sidebar > div {
    background: var(--white);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 5px 15px var(--shadow-light);
}

/* Course Navigation */
.nav-header {
    display: flex;
    justify-content: between;
    align-items: center;
    margin-bottom: 1rem;
}

.nav-header h5 {
    margin-bottom: 0;
    color: var(--black);
}

.nav-controls {
    display: flex;
    gap: 0.5rem;
}

.nav-controls .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

/* Course Modules */
.module-item {
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.module-header {
    background: var(--light-gray);
    padding: 1rem 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: between;
    align-items: center;
    transition: all 0.3s ease;
}

.module-header:hover {
    background: rgba(249, 176, 0, 0.1);
}

.module-header.active {
    background: var(--primary-yellow);
    color: var(--black);
}

.module-title {
    font-weight: 600;
    margin-bottom: 0;
}

.module-meta {
    font-size: 0.875rem;
    opacity: 0.8;
}

.module-toggle {
    transition: transform 0.3s ease;
}

.module-toggle.rotated {
    transform: rotate(180deg);
}

.module-content {
    display: none;
    padding: 0;
}

.module-content.show {
    display: block;
}

.lesson-item {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-gray);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.lesson-item:last-child {
    border-bottom: none;
}

.lesson-item:hover {
    background: rgba(249, 176, 0, 0.1);
}

.lesson-item.active {
    background: var(--primary-yellow);
    color: var(--black);
}

.lesson-item.completed {
    background: rgba(25, 135, 84, 0.1);
}

.lesson-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--border-gray);
    color: var(--medium-gray);
    flex-shrink: 0;
}

.lesson-item.active .lesson-icon {
    background: var(--black);
    color: var(--primary-yellow);
}

.lesson-item.completed .lesson-icon {
    background: #198754;
    color: var(--white);
}

.lesson-info {
    flex-grow: 1;
}

.lesson-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--black);
}

.lesson-duration {
    font-size: 0.875rem;
    color: var(--medium-gray);
}

.lesson-checkbox {
    margin-left: auto;
}

/* Materials List */
.material-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--border-gray);
    border-radius: 12px;
    margin-bottom: 0.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.material-item:hover {
    border-color: var(--primary-yellow);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--shadow-light);
}

.material-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-yellow);
    color: var(--black);
    flex-shrink: 0;
}

.material-info {
    flex-grow: 1;
}

.material-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--black);
}

.material-type {
    font-size: 0.875rem;
    color: var(--medium-gray);
}

/* FAQ Accordion */
.accordion-item {
    border: 1px solid var(--border-gray);
    border-radius: 12px !important;
    margin-bottom: 0.5rem;
}

.accordion-button {
    background: var(--white);
    color: var(--black);
    font-weight: 600;
    border-radius: 12px !important;
}

.accordion-button:not(.collapsed) {
    background: var(--primary-yellow);
    color: var(--black);
}

.accordion-button:focus {
    border-color: var(--primary-yellow);
    box-shadow: 0 0 0 0.25rem rgba(249, 176, 0, 0.25);
}

.accordion-body {
    color: var(--medium-gray);
    line-height: 1.6;
}

/* Star Rating */
.star-rating {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin: 1rem 0;
}

.star-rating i {
    font-size: 2rem;
    color: var(--border-gray);
    cursor: pointer;
    transition: all 0.3s ease;
}

.star-rating i:hover,
.star-rating i.active {
    color: var(--primary-yellow);
    transform: scale(1.1);
}

/* Responsive Design */
@media (max-width: 992px) {
    .course-view-main {
        padding-top: 0.5rem;
    }
    
    .course-sidebar {
        position: static;
        max-height: none;
        margin-top: 2rem;
    }
    
    .video-controls-overlay {
        position: static;
        justify-content: center;
        margin-top: 1rem;
        background: rgba(0, 0, 0, 0.8);
        padding: 1rem;
    }
    
    .course-meta {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .course-actions {
        justify-content: center;
    }
    
    .comments-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}

@media (max-width: 768px) {
    .course-info-section {
        padding: 1.5rem;
    }
    
    .course-header h1 {
        font-size: 1.5rem;
    }
    
    .course-progress-section {
        padding: 1rem;
    }
    
    .course-sidebar > div {
        padding: 1rem;
    }
    
    .lesson-item {
        padding: 0.75rem 1rem;
    }
    
    .material-item {
        padding: 0.75rem;
    }
    
    .comment-item {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .course-actions {
        flex-direction: column;
    }
    
    .course-actions .btn {
        width: 100%;
    }
    
    .nav-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .lesson-item {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .lesson-checkbox {
        margin-left: 0;
    }
}

/* Loading States */
.loading-placeholder {
    background: linear-gradient(90deg, var(--border-gray) 25%, rgba(224, 224, 224, 0.5) 50%, var(--border-gray) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: 8px;
    height: 20px;
    margin-bottom: 1rem;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--medium-gray);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h5 {
    margin-bottom: 1rem;
    color: var(--medium-gray);
}

/* Custom Scrollbar */
.course-sidebar::-webkit-scrollbar {
    width: 6px;
}

.course-sidebar::-webkit-scrollbar-track {
    background: var(--light-gray);
    border-radius: 3px;
}

.course-sidebar::-webkit-scrollbar-thumb {
    background: var(--primary-yellow);
    border-radius: 3px;
}

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