.pdf-reader-placeholder {
    padding: 30px;
    background: #f7f7f7;
    border: 2px dashed #ccc;
    text-align: center;
    color: #666;
    font-size: 14px;
}

.pdf-reader-container {
    width: 100%;
    max-width: 100%;
    font-family: sans-serif;
    background: #f1f1f1;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.pdf-reader-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #333;
    padding: 10px 15px;
}

.pdf-reader-btn {
    background: transparent;
    color: #fff;
    border: 1px solid #fff;
    border-radius: 4px;
    padding: 6px 12px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.2s ease;
}

.pdf-reader-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

.pdf-reader-page-info {
    color: #fff;
    font-size: 14px;
    user-select: none;
}

.pdf-viewport {
    position: relative;
    width: 100%;
    min-height: 300px;
    background: #525659;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    overflow-x: auto;
}

.pdf-loading-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #fff;
    font-size: 16px;
    font-weight: bold;
}

.pdf-canvas {
    display: block;
    max-width: 100%;
    height: auto !important;
}