/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    color: #333;
    background-color: #f5f5f5;
}

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

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

.login-box {
    background: white;
    border-radius: 8px;
    padding: 40px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.login-box h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 24px;
}

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

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.login-btn {
    width: 100%;
    padding: 12px;
    background-color: #667eea;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.login-btn:hover {
    background-color: #5a67d8;
}

.error-message {
    display: none;
    margin-top: 15px;
    padding: 10px;
    background-color: #fee;
    color: #c33;
    border-radius: 4px;
    text-align: center;
}

/* 主应用样式 */
.app-container {
    display: flex;
    height: 100vh;
}

.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
}

.app-header h1 {
    font-size: 20px;
    color: #333;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logout-btn {
    padding: 8px 16px;
    background-color: #f56565;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.logout-btn:hover {
    background-color: #e53e3e;
}

/* 侧边栏样式 */
.sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    bottom: 0;
    width: 200px;
    background: white;
    box-shadow: 2px 0 4px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
}

.menu {
    padding: 20px 0;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: #666;
    text-decoration: none;
    transition: all 0.3s;
}

.menu-item:hover {
    background-color: #f7fafc;
    color: #667eea;
}

.menu-item.active {
    background-color: #ebf4ff;
    color: #667eea;
    border-right: 3px solid #667eea;
}

.menu-item span {
    margin-right: 10px;
    font-size: 18px;
}

.admin-only {
    display: none;
}

/* 主内容区域 */
.main-content {
    margin-top: 60px;
    margin-left: 200px;
    padding: 20px;
    min-height: calc(100vh - 60px);
    background-color: #f5f5f5;
}

#pageContent {
    max-width: 1200px;
    margin: 0 auto;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e2e8f0;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

/* 表单样式 */
.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.form-col {
    flex: 1;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: #666;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

/* 按钮样式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background-color: #667eea;
    color: white;
}

.btn-primary:hover {
    background-color: #5a67d8;
}

.btn-success {
    background-color: #48bb78;
    color: white;
}

.btn-success:hover {
    background-color: #38a169;
}

.btn-danger {
    background-color: #f56565;
    color: white;
}

.btn-danger:hover {
    background-color: #e53e3e;
}

.btn-outline {
    background-color: white;
    border: 1px solid #ddd;
    color: #666;
}

.btn-outline:hover {
    background-color: #f7fafc;
}

/* 表格样式 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

.data-table th, .data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.data-table th {
    background-color: #f7fafc;
    font-weight: 600;
    color: #4a5568;
}

.data-table tr:hover {
    background-color: #f7fafc;
}

/* 状态标签 */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-normal {
    background-color: #c6f6d5;
    color: #22543d;
}

.status-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.status-error {
    background-color: #fee;
    color: #c33;
}

/* 表单样式 */
.form-row {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.form-col {
    flex: 1;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: #666;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
}

/* 文件上传 */
.file-upload {
    position: relative;
    display: inline-block;
}

.file-upload input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-upload-label {
    display: inline-block;
    padding: 10px 20px;
    background-color: #f7fafc;
    border: 1px dashed #cbd5e0;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

.file-upload-label:hover {
    background-color: #e2e8f0;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.stat-value {
    font-size: 32px;
    font-weight: 600;
    color: #333;
    margin: 10px 0;
}

.stat-label {
    color: #666;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.empty-state img {
    width: 200px;
    opacity: 0.5;
    margin-bottom: 20px;
}