/* 图书管理系统自定义样式 - 简洁版本 */

/* 全局样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.5;
}

/* 侧边栏样式 */
.sidebar {
    position: relative;
}

.sidebar.collapsed {
    margin-left: -250px;
}

/* 主内容区域 */
.main-content {
    padding: 20px;
}

.main-content.expanded {
    margin-left: -250px;
}

/* 表格样式 */
.table {
    background-color: white;
}

.table tbody tr:hover {
    background-color: #f8f9fa;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: -250px;
        width: 250px;
        height: 100vh;
        z-index: 1000;
    }
    
    .sidebar.show {
        left: 0;
    }
    
    .main-content {
        margin-left: 0;
        padding: 15px;
    }
    
    .navbar {
        padding-left: 60px;
    }
    
    .mobile-menu-btn {
        position: fixed;
        top: 15px;
        left: 15px;
        z-index: 1001;
        background-color: #007bff;
        color: white;
        border: none;
        padding: 10px;
        border-radius: 4px;
    }
}

/* 打印样式 */
@media print {
    .sidebar,
    .navbar,
    .btn,
    .pagination {
        display: none !important;
    }
    
    .main-content {
        margin: 0;
        padding: 0;
    }
    
    .card {
        border: 1px solid #ddd;
    }
}

/* 工具类 */
.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.border-start-primary {
    border-left: 4px solid #007bff !important;
}

.border-start-success {
    border-left: 4px solid #28a745 !important;
}

.border-start-warning {
    border-left: 4px solid #ffc107 !important;
}

.border-start-danger {
    border-left: 4px solid #dc3545 !important;
}