/* PDF Viewer 前端样式 */

.pdf-viewer-container {
    margin: 20px 0;
    position: relative;
    background: white;
    transition: box-shadow 0.3s ease;
}

.pdf-viewer-container:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.15) !important;
}

.pdf-viewer-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    user-select: none;
}

.pdf-viewer-container iframe {
    display: block;
    transition: opacity 0.3s ease;
}

.pdf-viewer-container iframe:not([src]) {
    opacity: 0.5;
}

/* 加载状态 */
.pdf-viewer-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(255, 255, 255, 0.9);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 10;
}

.pdf-viewer-loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #3498db;
    border-radius: 50%;
    animation: pdf-spin 1s linear infinite;
    margin-left: 10px;
}

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

/* 错误状态 */
.pdf-viewer-error {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #f5c6cb;
    margin: 20px 0;
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .pdf-viewer-container {
        margin: 15px 0;
        border-radius: 4px;
    }
    
    .pdf-viewer-header {
        padding: 8px 12px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .pdf-viewer-container {
        margin: 10px 0;
        height: 400px !important; /* 在小屏幕上限制高度 */
    }
    
    .pdf-viewer-header {
        padding: 6px 10px;
        font-size: 12px;
    }
}

/* 全屏模式支持 */
.pdf-viewer-fullscreen {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    z-index: 9999 !important;
    border-radius: 0 !important;
}

.pdf-viewer-fullscreen .pdf-viewer-header {
    background: #2c3e50 !important;
    color: white !important;
    padding: 15px 20px !important;
}

/* 打印样式 */
@media print {
    .pdf-viewer-container {
        box-shadow: none !important;
        border: none !important;
    }
    
    .pdf-viewer-header {
        display: none !important;
    }
}