/* Carousel container */
.pdf-carousel {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin: 20px auto;
    border: 2px solid #ddd;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    background-color: #f9f9f9;
    padding: 10px;
    box-sizing: border-box;
    text-align: center;
}

/* Each PDF page (canvas) */
.pdf-page {
    display: none;
    margin: auto;
    max-width: 100%;
}

.pdf-page.active {
    display: block;
}

/* Loading / error messages */
.pdf-message {
    font-family: sans-serif;
    font-size: 16px;
    color: #555;
    padding: 15px;
    text-align: center;
}

/* Navigation controls */
.pdf-controls {
    margin-top: 12px;
    display: flex;
    justify-content: center;   /* desktop: all centered */
    align-items: center;
    flex-wrap: nowrap;
    gap: 10px;
    flex-shrink: 1;
}

.pdf-btn {
    cursor: pointer;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    padding: 8px 16px;
    font-size: 16px;
    border-radius: 6px;
    flex-shrink: 0;
}

.pdf-btn:hover {
    background-color: rgba(0, 0, 0, 0.9);
}

/* Page number display */
.pdf-page-number {
    font-family: sans-serif;
    font-size: 15px;
    color: #333;
    margin: 0 10px;
    flex-shrink: 1;
}

/* Mobile adjustments */
@media (max-width: 480px) {
    .pdf-controls {
        justify-content: space-between; /* spread left / center / right */
    }
    .pdf-page-number {
        flex-grow: 1;
        text-align: center; /* keep page in the middle */
    }
    .pdf-btn {
        padding: 6px 12px;
        font-size: 14px;
    }
}