/* FC回测分发系统 2.0 - 主样式表 */

:root {
    /* 深色主题色彩 */
    --bg-primary: #0a0e16;
    --bg-secondary: #1a1f2e;
    --bg-tertiary: #2a2f3e;
    --bg-card: #1e2332;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-warning: linear-gradient(135deg, #fdbb2d 0%, #22c1c3 100%);
    --gradient-danger: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    
    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: #b8c5d6;
    --text-muted: #8892a6;
    
    /* 边框颜色 */
    --border-color: #2a3040;
    --border-light: #3a4050;
    
    /* 状态颜色 */
    --color-success: #00d4aa;
    --color-warning: #ffb800;
    --color-danger: #ff6b6b;
    --color-info: #667eea;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    
    /* 动画 */
    --transition: all 0.3s ease;
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.dark-theme {
    background: radial-gradient(ellipse at center, #1a1f2e 0%, #0a0e16 100%);
    min-height: 100vh;
}

/* 导航栏 */
.navbar {
    background: rgba(30, 35, 50, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-brand i {
    font-size: 1.8rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.version {
    font-size: 0.8rem;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    padding: 0.2rem 0.5rem;
    border: 1px solid rgba(240, 147, 251, 0.3);
    border-radius: 20px;
    margin-left: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

.nav-link.active {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* 容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    min-height: calc(100vh - 140px);
}

/* 数据面板 */
.data-panel {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.panel-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.refresh-btn {
    background: var(--gradient-primary);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.refresh-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.refresh-btn i {
    animation: none;
}

.refresh-btn:hover i {
    animation: spin 1s linear;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 统计卡片网格 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.stat-card:hover::before {
    transform: scaleX(1);
}

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

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--gradient-primary);
    color: white;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-card.loading .stat-value::after {
    content: '';
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--color-info);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 0.5rem;
}

/* 任务区域 */
.task-section {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-actions {
    display: flex;
    gap: 1rem;
}

.action-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.action-btn:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.action-btn.primary {
    background: var(--gradient-success);
    border: none;
    color: white;
}

.action-btn.primary:hover {
    color: white;
}

/* 任务列表 */
.task-list {
    min-height: 300px;
}

.loading-state, .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
    color: var(--text-muted);
    gap: 1rem;
}

.loading-state i {
    font-size: 2rem;
    color: var(--color-info);
}

.task-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.task-card {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.task-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.task-card.status-running::before { background: var(--gradient-warning); }
.task-card.status-completed::before { background: var(--gradient-success); }
.task-card.status-failed::before { background: var(--gradient-danger); }
.task-card.status-pending::before { background: var(--gradient-primary); }

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

.task-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.task-id {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.task-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
}

.task-status.running { 
    background: rgba(255, 184, 0, 0.2); 
    color: var(--color-warning); 
}
.task-status.completed { 
    background: rgba(0, 212, 170, 0.2); 
    color: var(--color-success); 
}
.task-status.failed { 
    background: rgba(255, 107, 107, 0.2); 
    color: var(--color-danger); 
}
.task-status.pending { 
    background: rgba(102, 126, 234, 0.2); 
    color: var(--color-info); 
}

.task-strategy {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.task-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.85rem;
}

.task-meta-item {
    color: var(--text-muted);
}

.task-meta-item strong {
    color: var(--text-secondary);
}

.task-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.task-btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.8rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.task-btn.view {
    background: var(--gradient-primary);
    color: white;
}

.task-btn.delete {
    background: var(--gradient-danger);
    color: white;
}

.task-btn.download {
    background: var(--gradient-success);
    color: white;
}

.task-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* 页脚 */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 2rem;
    margin-top: 2rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
}

.modal-content {
    background: var(--bg-card);
    margin: 15% auto;
    padding: 0;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    animation: modalShow 0.3s ease;
}

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

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 2rem;
    color: var(--text-secondary);
}

.modal-footer {
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

.btn {
    background: var(--gradient-primary);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: var(--transition);
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .container {
        padding: 1rem;
    }
    
    .data-panel, .task-section {
        padding: 1.5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 1rem;
    }
    
    .stat-card {
        padding: 1rem;
        flex-direction: column;
        text-align: center;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .task-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-brand {
        font-size: 1.2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .section-actions {
        width: 100%;
        justify-content: space-between;
    }
}