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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

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

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-box {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

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

.logo-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 28px;
    font-weight: bold;
    margin: 0 auto 15px;
}

.login-logo h1 {
    font-size: 22px;
    color: #333;
    margin-bottom: 5px;
}

.login-logo p {
    color: #999;
    font-size: 14px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

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

.login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.login-hint {
    text-align: center;
    color: #999;
    font-size: 12px;
    margin-top: 20px;
}

/* 主布局 */
.main-layout {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 250px;
    background: #1a1a2e;
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-header h2 {
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-header .logo-icon {
    width: 35px;
    height: 35px;
    font-size: 16px;
}

.sidebar-menu {
    padding: 20px 0;
}

.menu-item {
    padding: 15px 25px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: all 0.3s;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
}

.menu-item:hover,
.menu-item.active {
    background: rgba(255,255,255,0.1);
    color: white;
}

.menu-item i {
    font-size: 18px;
    width: 24px;
    text-align: center;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 20px;
}

/* 顶部导航 */
.top-nav {
    background: white;
    padding: 15px 25px;
    border-radius: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-left h1 {
    font-size: 20px;
    color: #333;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: #666;
    text-decoration: none;
    font-size: 14px;
    padding: 5px 10px;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: #667eea;
    background: rgba(102, 126, 234, 0.1);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #666;
    font-size: 14px;
}

.user-avatar {
    width: 35px;
    height: 35px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
}

.logout-btn {
    padding: 6px 15px;
    background: #f5f5f5;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 13px;
    color: #666;
    transition: all 0.3s;
}

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

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.stat-label {
    color: #999;
    font-size: 14px;
}

.stat-change {
    font-size: 12px;
    margin-top: 10px;
}

.stat-change.up {
    color: #52c41a;
}

.stat-change.down {
    color: #ff4d4f;
}

/* 图表区域 */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.chart-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.chart-card h3 {
    font-size: 16px;
    margin-bottom: 20px;
    color: #333;
}

.chart-container {
    height: 250px;
    position: relative;
}

/* 培训列表 */
.section-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-header h3 {
    font-size: 18px;
    color: #333;
}

.btn-primary {
    padding: 10px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    padding: 8px 16px;
    background: #f5f5f5;
    color: #666;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.3s;
}

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

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

.data-table th,
.data-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

.data-table th {
    font-weight: 600;
    color: #666;
    font-size: 13px;
    background: #fafafa;
}

.data-table td {
    font-size: 14px;
    color: #333;
}

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

.status-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    display: inline-block;
}

.status-pending {
    background: #fff7e6;
    color: #fa8c16;
}

.status-ongoing {
    background: #e6f7ff;
    color: #1890ff;
}

.status-completed {
    background: #f6ffed;
    color: #52c41a;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 25px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 20px;
    color: #333;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #999;
}

.modal-body {
    padding: 25px;
}

.modal-footer {
    padding: 20px 25px;
    border-top: 1px solid #f0f0f0;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 表单样式 */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 8px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.checkbox-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
}

.checkbox-item label {
    font-size: 14px;
    color: #555;
}

/* 二维码显示 */
.qr-display {
    text-align: center;
    padding: 30px;
}

.qr-code {
    width: 200px;
    height: 200px;
    margin: 0 auto 20px;
    padding: 15px;
    background: white;
    border: 1px solid #eee;
    border-radius: 8px;
}

.qr-code img {
    width: 100%;
    height: 100%;
}

/* 标签页 */
.tabs {
    display: flex;
    border-bottom: 1px solid #f0f0f0;
    margin-bottom: 20px;
}

.tab {
    padding: 12px 20px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
    color: #666;
}

.tab:hover {
    color: #667eea;
}

.tab.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

.tab-content {
    display: none;
}

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

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        width: 0;
        overflow: hidden;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 提示消息 */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 2000;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid #52c41a;
}

.toast.error {
    border-left: 4px solid #ff4d4f;
}