/* 现代化进销存管理系统样式 */
:root {
    --primary-color: #3b82f6;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --light-bg: #f8fafc;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* 全局样式重置 */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

/* 容器布局 */
.container-fluid {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color);
    text-decoration: none;
}

.navbar-nav .nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
}

/* 卡片系统 */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

/* 统计卡片 */
.stat-card {
    background: linear-gradient(135deg, var(--card-bg), #f8fafc);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* 按钮系统 */
.btn {
    border-radius: var(--radius-md);
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border: none;
    transition: all 0.2s ease;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), #1e40af);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: white;
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669, #047857);
    transform: translateY(-1px);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* 表单样式 */
.form-control {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: all 0.2s ease;
    background: var(--card-bg);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: block;
}

.form-select {
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    background: var(--card-bg);
    transition: all 0.2s ease;
}

.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    outline: none;
}

/* 表格样式 */
.table {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    margin-bottom: 0;
}

.table thead th {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    border: none;
    font-weight: 600;
    color: var(--text-primary);
    padding: 1rem;
    text-align: left;
}

.table tbody td {
    padding: 1rem;
    border-color: var(--border-color);
    vertical-align: middle;
}

.table tbody tr:hover {
    background: rgba(59, 130, 246, 0.05);
}

/* 徽章样式 */
.badge {
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.75rem;
}

.badge-success {
    background: var(--success-color);
    color: white;
}

.badge-warning {
    background: var(--warning-color);
    color: white;
}

.badge-danger {
    background: var(--danger-color);
    color: white;
}

.badge-primary {
    background: var(--primary-color);
    color: white;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.page-link {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
}

.page-link:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.page-link.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 警告框样式 */
.alert {
    border-radius: var(--radius-lg);
    border: none;
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.alert-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(5, 150, 105, 0.1));
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.1), rgba(220, 38, 38, 0.1));
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(217, 119, 6, 0.1));
    color: #92400e;
    border-left: 4px solid var(--warning-color);
}

/* 图表容器 */
.chart-container {
    position: relative;
    height: 400px;
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

/* 浮动操作按钮 */
.fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: all 0.3s ease;
    cursor: pointer;
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container-fluid {
        padding: 0 0.5rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 0.625rem 1.25rem;
    }
    
    .table-responsive {
        border-radius: var(--radius-lg);
    }
    
    .chart-container {
        height: 300px;
        padding: 1rem;
    }
    
    .fab {
        bottom: 1rem;
        right: 1rem;
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
}

@media (max-width: 576px) {
    .stat-card {
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 1.25rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    
    .form-control,
    .form-select {
        padding: 0.625rem 0.875rem;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(59, 130, 246, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 工具提示 */
.tooltip {
    font-size: 0.875rem;
}

.tooltip-inner {
    background: rgba(0, 0, 0, 0.9);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* 隐藏移动端元素 */
@media (min-width: 769px) {
    .mobile-only {
        display: none !important;
    }
}

/* 隐藏PC端元素 */
@media (max-width: 768px) {
    .desktop-only {
        display: none !important;
    }
}