.pdf-container {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 20px;
    position: relative;
    flex-direction: row;
}

.pdf-controls {
    text-align: center;
    margin-top: 10px;
}

.pdf-viewer {
    border: 1px solid #ddd;
    padding: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
}

canvas {
    max-width: 100%;
    height: auto;
}

.btn {
    background-color: #007bff;
    border: none;
    color: white;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.3s;
}

    .btn:hover {
        background-color: #0056b3;
    }

    .btn:focus {
        outline: none;
        box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
    }

    .btn:disabled {
        background-color: #cccccc;
        cursor: not-allowed;
    }

.prev-btn {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
}

.next-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
}

@media (max-width: 768px) {
    .pdf-container {
        flex-direction: column;
    }

    .prev-btn, .next-btn {
        position: static;
        transform: none;
    }
}