/* 仓库管理系统样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background-color: #f0f2f5;
    color: #333;
    font-size: 14px;
    line-height: 1.6;
}

/* 登录页 */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 24px;
    color: #1a73e8;
    margin-bottom: 8px;
}

.login-header p {
    font-size: 12px;
    color: #999;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: #666;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #1a73e8;
}

.btn-login {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: opacity 0.3s;
}

.btn-login:hover {
    opacity: 0.9;
}

.error-msg {
    color: #e53935;
    font-size: 14px;
    margin-bottom: 16px;
    text-align: center;
}

/* 主布局 */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部 */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: #fff;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.header-logo {
    font-size: 20px;
    font-weight: bold;
    color: #1a73e8;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-logout {
    padding: 8px 16px;
    background: #f5f5f5;
    color: #666;
    text-decoration: none;
    border-radius: 6px;
    font-size: 13px;
    transition: background 0.3s;
}

.btn-logout:hover {
    background: #e0e0e0;
}

/* 标签导航 */
.nav-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    background: #fff;
    padding: 12px 16px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    background: #f5f5f5;
    color: #666;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.tab-btn:hover {
    background: #e8e8e8;
}

.tab-btn.active {
    background: #1a73e8;
    color: #fff;
}

/* 内容区域 */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* 面板 */
.panel {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.panel h2 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #333;
}

.panel h3 {
    font-size: 16px;
    margin-bottom: 16px;
    color: #333;
}

.panel-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 900px) {
    .panel-split {
        grid-template-columns: 1fr;
    }
}

/* 统计卡片 */
.stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 24px;
    border-radius: 12px;
    text-align: center;
}

.stat-card:nth-child(2) {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.stat-card:nth-child(3) {
    background: linear-gradient(135deg, #fc4a1a 0%, #f7b733 100%);
}

.stat-num {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 13px;
    opacity: 0.9;
}

/* 表单 */
.form-inline {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.form-row .form-group {
    flex: 1;
    min-width: 150px;
    margin-bottom: 0;
}

.form-row .form-group label {
    font-size: 13px;
}

.form-row .form-group input,
.form-row .form-group select {
    padding: 10px 12px;
}

.btn {
    padding: 10px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: opacity 0.3s;
    white-space: nowrap;
}

.btn:hover {
    opacity: 0.9;
}

.btn-primary {
    background: #1a73e8;
    color: #fff;
}

.btn-success {
    background: #4caf50;
    color: #fff;
}

.btn-warning {
    background: #ff9800;
    color: #fff;
}

/* 表格 */
.table-wrapper {
    overflow-x: auto;
    margin-top: 16px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.data-table th,
.data-table td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.data-table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #555;
    font-size: 13px;
}

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

.data-table .text-center {
    text-align: center;
    color: #999;
    padding: 40px;
}

.btn-delete {
    padding: 6px 12px;
    background: #e53935;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.btn-delete:hover {
    background: #c62828;
}

/* Toast */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    padding: 12px 24px;
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    border-radius: 8px;
    font-size: 14px;
    z-index: 9999;
    transition: transform 0.3s;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: rgba(76, 175, 80, 0.95);
}

.toast.error {
    background: rgba(229, 57, 53, 0.95);
}

/* 响应式 */
@media (max-width: 768px) {
    .stats-row {
        grid-template-columns: 1fr;
    }
    
    .nav-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: 1;
        min-width: 100px;
        text-align: center;
    }
}

/* 日期输入框样式 */
.date-input-wrapper {
    display: flex;
    align-items: center;
}

.date-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-radius: 8px 0 0 8px;
    font-size: 14px;
}

.date-input:focus {
    border-color: #1a73e8;
}

.date-picker {
    padding: 12px 16px;
    border: 1px solid #ddd;
    border-left: none;
    border-radius: 0 8px 8px 0;
    font-size: 14px;
    background: #f8f9fa;
    cursor: pointer;
}

.date-picker:hover {
    background: #e9ecef;
}

/* 清空库存危险区域 */
.danger-zone {
    margin-top: 30px;
    padding: 20px;
    background: #fff5f5;
    border: 2px dashed #ffcccc;
    border-radius: 12px;
    text-align: center;
}

.danger-zone small {
    display: block;
    margin-top: 10px;
    color: #999;
    font-size: 12px;
}

.btn-danger {
    background: #fff !important;
    color: #dc3545 !important;
    border: 2px solid #dc3545 !important;
    padding: 10px 24px;
    font-size: 14px;
}

.btn-danger:hover {
    background: #dc3545 !important;
    color: #fff !important;
}

/* 删除按钮样式 */
.btn-delete {
    padding: 6px 12px;
    background: #dc3545;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-delete:hover {
    background: #c82333;
}