* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: #f8f9fa;
    color: #343a40;
    line-height: 1.6;
    padding-bottom: 2rem;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px 15px;
}

/* 页眉和页脚 */
.app-header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid #dee2e6;
}

.app-header h1 {
    color: #0d6efd;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.subtitle {
    color: #6c757d;
    font-size: 1.1rem;
}

.app-footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid #dee2e6;
    color: #6c757d;
}

/* 卡片样式 */
.card {
    margin-bottom: 1.5rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border: none;
    border-radius: 0.5rem;
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
    padding: 1rem 1.25rem;
}

.card-header h2 {
    margin: 0;
    font-size: 1.4rem;
    color: #0d6efd;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* 导入区域样式 */
.file-upload {
    display: flex;
    gap: 12px;
    margin-bottom: 1rem;
    align-items: center;
}

.file-upload input[type="file"] {
    flex: 1;
}

.hint {
    font-size: 0.85rem;
    color: #6c757d;
    margin-top: 0.5rem;
}

/* 列选择区域 */
.column-select-section {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: #f8f9fa;
    border-radius: 0.5rem;
    border: 1px solid #dee2e6;
}

.column-options {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 1rem 0;
}

.column-option {
    background-color: #fff;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.column-option:hover {
    border-color: #0d6efd;
}

.column-option.selected {
    background-color: #0d6efd;
    color: #fff;
    border-color: #0d6efd;
}

/* 选中列显示区域 */
.selected-columns-list {
    padding: 10px;
    background-color: #fff;
    border: 1px solid #dee2e6;
    border-radius: 0.25rem;
    min-height: 45px;
}

.selected-column-tag {
    display: inline-block;
    background-color: #e9ecef;
    color: #495057;
    padding: 0.25rem 0.5rem;
    margin: 0.25rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
}

.selected-column-tag .remove-tag {
    margin-left: 0.5rem;
    cursor: pointer;
    color: #6c757d;
}

.selected-column-tag .remove-tag:hover {
    color: #dc3545;
}

/* 配置导入区域 */
.config-import {
    margin-bottom: 2rem;
    padding: 1.25rem;
    background-color: #f0f8ff;
    border-radius: 0.5rem;
    border: 1px dashed #bdc3c7;
}

.config-import h3 {
    margin-top: 0;
    color: #0d6efd;
}

.template-download {
    margin-top: 1rem;
}

/* 考场配置区域 */
.room-config {
    margin-bottom: 1.5rem;
}

.room-group {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    padding: 1rem;
    transition: all 0.3s ease;
}

.room-group:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
}

.room-setting {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}

.room-setting input[type="number"] {
    width: 80px;
    padding: 0.375rem 0.75rem;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
}

.delete-config-btn {
    margin-left: auto;
}

.apply-btn {
    margin-top: 1rem;
    width: 100%;
}

/* 数据预览区域 */
.data-counter {
    background-color: #0d6efd;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.85rem;
}

.table-container {
    max-height: 500px;
    overflow-y: auto;
    margin-top: 1rem;
    border-radius: 0.25rem;
    border: 1px solid #dee2e6;
}

thead {
    position: sticky;
    top: 0;
    z-index: 1;
}

/* 导出按钮区域 */
.actions {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

#exportBtn {
    padding: 0.75rem 2rem;
    font-size: 1.1rem;
    min-width: 250px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .file-upload {
        flex-direction: column;
    }
    
    .file-upload input[type="file"], 
    .file-upload button {
        width: 100%;
    }
    
    .room-setting {
        gap: 8px;
    }
    
    .room-setting input[type="number"] {
        width: 60px;
    }
    
    .delete-config-btn {
        margin-left: 0;
        margin-top: 10px;
    }
}