/* Excel查看器样式 */
.excel-viewer {
    background: #f8f9fa;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    height: 100%;
    display: flex;
    flex-direction: column;
}

/* Excel头部 */
.excel-header {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.excel-info h3 {
    margin: 0 0 5px 0;
    font-size: 1.4em;
    font-weight: 600;
}

.excel-info p {
    margin: 0;
    opacity: 0.9;
    font-size: 0.95em;
}

.excel-controls {
    display: flex;
    gap: 10px;
}

.excel-controls .btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.excel-controls .btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 工作表选项卡 */
.sheet-tabs {
    background: #e9ecef;
    padding: 0;
    display: flex;
    overflow-x: auto;
    border-bottom: 1px solid #dee2e6;
}

.sheet-tab {
    background: transparent;
    border: none;
    padding: 12px 20px;
    cursor: pointer;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    color: #6c757d;
    font-weight: 500;
    transition: all 0.2s;
    min-width: 120px;
    text-align: center;
}

.sheet-tab:hover {
    background: #f8f9fa;
    color: #495057;
}

.sheet-tab.active {
    background: white;
    color: #28a745;
    border-bottom-color: #28a745;
    font-weight: 600;
}

/* Excel内容区域 */
.excel-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: white;
}

.excel-toolbar {
    background: #f8f9fa;
    padding: 10px 20px;
    border-bottom: 1px solid #dee2e6;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sheet-info {
    color: #6c757d;
    font-size: 0.9em;
    font-weight: 500;
}

.view-controls {
    display: flex;
    gap: 8px;
}

.view-controls .btn {
    background: #6c757d;
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85em;
    transition: background-color 0.2s;
}

.view-controls .btn:hover {
    background: #5a6268;
}

/* 表格容器 */
.excel-table-container {
    flex: 1;
    overflow: auto;
    padding: 20px;
    background: white;
}

.excel-sheet-wrapper {
    min-height: 100%;
}

/* Excel表格样式 */
#excel-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 14px;
    background: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

#excel-table th,
#excel-table td {
    border: 1px solid #e9ecef;
    padding: 8px 12px;
    text-align: left;
    vertical-align: top;
    min-width: 60px;
    max-width: 300px;
    word-wrap: break-word;
}

#excel-table th {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    font-weight: 600;
    color: #495057;
    position: sticky;
    top: 0;
    z-index: 10;
}

#excel-table tr:nth-child(even) {
    background-color: #f8f9fa;
}

#excel-table tr:hover {
    background-color: #e3f2fd;
}

/* 数字单元格右对齐 */
#excel-table td:has-text([0-9]) {
    text-align: right;
}

/* 加载状态 */
.excel-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 400px;
    color: #6c757d;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #28a745;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

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

.excel-loading h3 {
    margin: 0 0 10px 0;
    color: #495057;
}

.excel-loading p {
    margin: 0;
    color: #6c757d;
}

/* 错误状态 */
.excel-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 400px;
    color: #dc3545;
    text-align: center;
    padding: 40px;
}

.error-icon {
    font-size: 3em;
    margin-bottom: 20px;
}

.excel-error h3 {
    margin: 0 0 15px 0;
    color: #dc3545;
}

.excel-error p {
    margin: 0 0 20px 0;
    color: #6c757d;
}

.excel-error .btn {
    background: #dc3545;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s;
}

.excel-error .btn:hover {
    background: #c82333;
}

/* 空工作表 */
.excel-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 300px;
    color: #6c757d;
    font-size: 1.1em;
    font-style: italic;
}

/* 全屏模式 */
.excel-viewer.fullscreen-mode {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 9999;
    background: white;
}

.excel-viewer.fullscreen-mode .excel-table-container {
    padding: 10px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .excel-header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .excel-controls {
        justify-content: center;
    }
    
    .excel-toolbar {
        flex-direction: column;
        gap: 10px;
        align-items: stretch;
    }
    
    .view-controls {
        justify-content: center;
    }
    
    .sheet-tabs {
        justify-content: flex-start;
    }
    
    .sheet-tab {
        min-width: 100px;
        font-size: 0.9em;
        padding: 10px 15px;
    }
    
    #excel-table {
        font-size: 12px;
    }
    
    #excel-table th,
    #excel-table td {
        padding: 6px 8px;
        min-width: 50px;
        max-width: 200px;
    }
}

/* 滚动条样式 */
.excel-table-container::-webkit-scrollbar,
.sheet-tabs::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.excel-table-container::-webkit-scrollbar-track,
.sheet-tabs::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.excel-table-container::-webkit-scrollbar-thumb,
.sheet-tabs::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

.excel-table-container::-webkit-scrollbar-thumb:hover,
.sheet-tabs::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* 按钮通用样式 */
.btn {
    display: inline-block;
    font-weight: 400;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    border-radius: 0.2rem;
}

.btn-secondary {
    color: #fff;
    background-color: #6c757d;
    border-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #545b62;
}

.btn-primary {
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #004085;
}