/* PDF Viewer Styles */
.pdf-viewer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

@media (min-width: 992px) {
    .pdf-viewer-container {
        flex-direction: row;
    }
}

.main-pdf-container {
    flex: 1;
    position: relative;
    padding-bottom: 129.4%; /* A4 aspect ratio */
    height: 0;
    overflow: hidden;
    background-color: #f0f0f0;
    border-radius: 8px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

@media (min-width: 992px) {
    .main-pdf-container {
        padding-bottom: 80%; /* Adjusted for side-by-side layout */
    }
}

.main-pdf-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.pdf-playlist {
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
    max-height: 400px;
    overflow-y: auto;
}

@media (min-width: 992px) {
    .pdf-playlist {
        width: 320px;
        margin-top: 0;
        margin-left: 20px;
        max-height: 500px;
    }
}

.pdf-playlist-header {
    padding: 15px;
    background-color: var(--dark-color);
    color: white;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pdf-playlist-header h4 {
    margin: 0;
    font-size: 1.1rem;
}

.pdf-playlist-count {
    background-color: var(--primary-color);
    color: white;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: bold;
}

.pdf-playlist-items {
    list-style: none;
    padding: 0;
    margin: 0;
}

.pdf-playlist-item {
    padding: 15px;
    border-bottom: 1px solid #eee;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: background-color 0.3s ease;
}

.pdf-playlist-item:hover {
    background-color: #f0f0f0;
}

.pdf-playlist-item.active {
    background-color: rgba(39, 174, 96, 0.1);
    border-left: 4px solid var(--primary-color);
}

.pdf-playlist-item-icon {
    width: 32px;
    height: 32px;
    color: var(--dark-color);
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 15px;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.pdf-playlist-item.active .pdf-playlist-item-icon {
    color: var(--primary-color);
}

.pdf-playlist-item-content {
    flex: 1;
}

.pdf-playlist-item-title {
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--dark-color);
}

.pdf-playlist-item-description {
    font-size: 0.8rem;
    color: #666;
}

.pdf-playlist-item-view {
    color: var(--primary-color);
    margin-left: 10px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.pdf-playlist-item:hover .pdf-playlist-item-view,
.pdf-playlist-item.active .pdf-playlist-item-view {
    opacity: 1;
}

/* PDF controls */
.pdf-controls {
    display: flex;
    justify-content: center;
    margin-top: 10px;
    background-color: var(--white);
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.pdf-control-button {
    background-color: var(--dark-color);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 15px;
    margin: 0 5px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
}

.pdf-control-button:hover {
    background-color: var(--primary-color);
}

.pdf-page-info {
    display: flex;
    align-items: center;
    margin: 0 10px;
    font-size: 0.9rem;
}

.pdf-page-input {
    width: 40px;
    text-align: center;
    margin: 0 5px;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.pdf-total-pages {
    margin-left: 5px;
}