/* Video Player Styles */
.video-container {
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.video-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* Video List Styles */
.video-list {
    max-height: 600px;
    overflow-y: auto;
    padding-right: 10px;
}

.video-list::-webkit-scrollbar {
    width: 6px;
}

.video-list::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.video-list::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 3px;
}

.video-list::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.video-item {
    display: flex;
    align-items: center;
    padding: 10px;
    margin-bottom: 10px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    cursor: pointer;
    transition: all 0.3s ease;
}

.video-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.video-item.active {
    background: #e3f2fd;
    border-left: 4px solid #2196f3;
}

.video-thumbnail {
    width: 120px;
    height: 68px;
    object-fit: cover;
    border-radius: 4px;
    margin-right: 12px;
}

.video-title {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 4px;
    color: #333;
}

.video-duration {
    font-size: 0.8rem;
    color: #666;
}

/* Notes Section Styles */
.notes-section {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.notes-list {
    max-height: 500px;
    overflow-y: auto;
    padding: 15px;
}

.notes-list::-webkit-scrollbar {
    width: 6px;
}

.notes-list::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.notes-list::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 3px;
}

.notes-list::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.note-item {
    margin-bottom: 15px;
}

.note-item .card {
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.note-item .card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.note-item .card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.timestamp-btn {
    color: #0d6efd;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.timestamp-btn:hover {
    color: #0a58ca;
    text-decoration: none;
}

.note-text {
    font-size: 0.95rem;
    color: #333;
    line-height: 1.5;
}

/* Notes Input Section */
.notes-input-section .card {
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.notes-input-section textarea {
    border: 1px solid #dee2e6;
    resize: vertical;
    min-height: 100px;
    font-size: 0.95rem;
    line-height: 1.5;
    padding: 12px;
}

.notes-input-section textarea:focus {
    border-color: #86b7fe;
    box-shadow: 0 0 0 0.25rem rgba(13,110,253,.25);
}

#currentTimestamp {
    font-family: monospace;
    font-size: 1.1rem;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

/* Notes Statistics */
.notes-stats .card {
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.notes-stats .progress {
    height: 8px;
    border-radius: 4px;
    background-color: #e9ecef;
}

.notes-stats .progress-bar {
    background-color: #0d6efd;
    transition: width 0.6s ease;
}

/* Edit Note Form */
.edit-note-form textarea {
    border: 1px solid #dee2e6;
    resize: vertical;
    min-height: 80px;
    font-size: 0.95rem;
    line-height: 1.5;
    padding: 8px;
}

.edit-note-form textarea:focus {
    border-color: #86b7fe;
    box-shadow: 0 0 0 0.25rem rgba(13,110,253,.25);
}

/* Animations */
@keyframes flash {
    0% { background-color: #198754; }
    100% { background-color: #f8f9fa; }
}

.timestamp-flash {
    animation: flash 0.5s ease;
}

/* Playlist Section Styles */
.playlist-section {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
}

.playlist-item {
    background: #f8f9fa;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 10px;
}

.playlist-item h5 {
    margin-bottom: 4px;
    color: #333;
}

.playlist-item p {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 8px;
}

/* Class Selector Styles */
.class-selector {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.class-selector select {
    border: 1px solid #dee2e6;
    border-radius: 6px;
    padding: 8px 12px;
}

.class-selector select:focus {
    border-color: #2196f3;
    box-shadow: 0 0 0 0.2rem rgba(33, 150, 243, 0.25);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .video-thumbnail {
        width: 100px;
        height: 56px;
    }
    
    .video-title {
        font-size: 0.85rem;
    }
    
    .video-duration {
        font-size: 0.75rem;
    }
    
    .class-selector .col-md-4 {
        margin-bottom: 10px;
    }
    
    .notes-list {
        max-height: 400px;
    }
    
    .note-item .card-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .note-item .btn-group {
        margin-top: 8px;
    }
    
    #currentTimestamp {
        font-size: 1rem;
    }
}

/* Loading Animation */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

.loading i {
    font-size: 2rem;
    color: #2196f3;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}