/* ============================================
   基金套利助手 - 样式表
   ============================================ */

/* CSS变量定义 */
:root {
    /* 主色调 */
    --primary-color: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    
    /* 功能色 */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #06b6d4;
    
    /* 涨跌色 */
    --up-color: #ef4444;
    --down-color: #10b981;
    
    /* 中性色 */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

/* 重置样式 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* 应用容器 */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   头部区域
   ============================================ */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo svg {
    width: 28px;
    height: 28px;
}

.app-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.02em;
}

.update-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
}

.update-label {
    font-weight: 500;
}

.update-time {
    font-weight: 600;
    color: white;
}

.update-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.15);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 20px;
    margin-left: var(--spacing-sm);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-text {
    font-size: 0.75rem;
    font-weight: 500;
}

/* ============================================
   导航标签
   ============================================ */
.nav-tabs {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.nav-content {
    display: flex;
    gap: var(--spacing-xs);
    min-width: max-content;
}

.nav-tab {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav-tab:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-tab.active {
    background: var(--primary-color);
    color: white;
}

.tab-icon {
    font-size: 1rem;
}

/* ============================================
   统计概览
   ============================================ */
.stats-overview {
    margin-bottom: var(--spacing-md);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.stat-card.highlight {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border: 2px solid var(--warning-color);
}

.stat-card.highlight .stat-value {
    color: var(--warning-color);
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ============================================
   主内容区域
   ============================================ */
.main-content {
    flex: 1;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.fund-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.fund-table thead {
    background: var(--bg-tertiary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.fund-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    user-select: none;
}

.fund-table th.sortable {
    cursor: pointer;
    transition: color var(--transition-fast);
}

.fund-table th.sortable:hover {
    color: var(--primary-color);
}

.fund-table th.active {
    color: var(--primary-color);
}

.sort-icon {
    margin-left: var(--spacing-xs);
    font-size: 0.75rem;
    opacity: 0.5;
}

.fund-table th.active .sort-icon {
    opacity: 1;
}

.fund-table tbody tr {
    border-bottom: 1px solid var(--border-light);
    transition: background-color var(--transition-fast);
}

.fund-table tbody tr:hover {
    background: var(--bg-tertiary);
}

.fund-table td {
    padding: var(--spacing-md);
    vertical-align: middle;
}

/* 列宽设置 */
.col-favorite { width: 60px; text-align: center; }
.col-name { min-width: 150px; }
.col-code { width: 100px; }
.col-nav { width: 120px; }
.col-premium { width: 100px; }
.col-price { width: 100px; }
.col-change { width: 100px; }
.col-limit { width: 100px; }
.col-action { width: 80px; text-align: center; }

/* 基金名称样式 */
.fund-name {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.fund-name-text {
    font-weight: 600;
    color: var(--text-primary);
}

.fund-name-sub {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* 基金代码 */
.fund-code {
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    display: inline-block;
}

/* 数值显示 */
.value-primary {
    font-weight: 600;
    color: var(--text-primary);
}

.value-secondary {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

/* 涨跌颜色 */
.text-up {
    color: var(--up-color);
}

.text-down {
    color: var(--down-color);
}

.text-neutral {
    color: var(--text-secondary);
}

/* 溢价率样式 */
.premium-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.875rem;
}

.premium-high {
    background: rgba(239, 68, 68, 0.1);
    color: var(--up-color);
}

.premium-medium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.premium-low {
    background: rgba(16, 185, 129, 0.1);
    color: var(--down-color);
}

/* 限购标签 */
.limit-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.limit-none {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.limit-low {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.limit-medium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.limit-high {
    background: rgba(6, 182, 212, 0.1);
    color: var(--info-color);
}

.limit-suspended {
    background: rgba(100, 116, 139, 0.1);
    color: var(--text-secondary);
}

/* 自选按钮 */
.favorite-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.3;
    transition: all var(--transition-fast);
    padding: var(--spacing-xs);
}

.favorite-btn:hover {
    opacity: 0.6;
    transform: scale(1.1);
}

.favorite-btn.active {
    opacity: 1;
}

.favorite-btn.active {
    color: var(--warning-color);
}

/* 操作按钮 */
.action-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* 空状态 */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.empty-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* 加载状态 */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

.loading-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   页脚
   ============================================ */
.footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-left {
    flex: 1;
    min-width: 280px;
}

.disclaimer {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

.data-source {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.version {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-family: monospace;
}

/* ============================================
   模态框
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
    transition: color var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    max-height: calc(90vh - 80px);
}

/* 设置项 */
.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-light);
}

.setting-item:last-child {
    border-bottom: none;
}

.setting-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.setting-select,
.setting-input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    background: var(--bg-secondary);
}

.setting-input {
    width: 80px;
    text-align: right;
}

.setting-unit {
    margin-left: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.setting-actions {
    margin-top: var(--spacing-lg);
    display: flex;
    justify-content: flex-end;
}

/* 开关 */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: var(--transition-fast);
    border-radius: 26px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-fast);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.toggle-switch input:checked + .toggle-slider {
    background-color: var(--primary-color);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(22px);
}

/* 按钮 */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

/* ============================================
   Toast提示
   ============================================ */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: toastSlideIn 0.3s ease;
    min-width: 280px;
}

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

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

.toast.info {
    border-left: 4px solid var(--info-color);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.toast-message {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.toast-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: var(--spacing-xs);
    line-height: 1;
}

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

/* ============================================
   详情模态框内容
   ============================================ */
.fund-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.detail-item {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.detail-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.detail-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.detail-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

.detail-section-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .app-container {
        padding: var(--spacing-sm);
    }
    
    .header {
        padding: var(--spacing-md);
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .logo-section {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .app-title {
        font-size: 1.5rem;
    }
    
    .update-info {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .fund-table {
        font-size: 0.8125rem;
    }
    
    .fund-table th,
    .fund-table td {
        padding: var(--spacing-sm);
    }
    
    .col-code,
    .col-change {
        display: none;
    }
    
    .premium-badge,
    .limit-badge {
        padding: 2px 6px;
        font-size: 0.75rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .modal-content {
        margin: var(--spacing-sm);
        max-height: calc(100vh - var(--spacing-lg));
    }
    
    .toast-container {
        left: var(--spacing-md);
        right: var(--spacing-md);
    }
    
    .toast {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-tab {
        padding: var(--spacing-sm);
        font-size: 0.8125rem;
    }
    
    .tab-icon {
        display: none;
    }
    
    .col-nav {
        display: none;
    }
    
    .fund-name-sub {
        display: none;
    }
}

/* ============================================
   暗色模式支持
   ============================================ */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        
        --text-primary: #f1f5f9;
        --text-secondary: #94a3b8;
        --text-tertiary: #64748b;
        
        --border-color: #334155;
        --border-light: #1e293b;
    }
    
    .search-box input,
    .filter-select,
    .setting-select,
    .setting-input {
        background: var(--bg-tertiary);
        color: var(--text-primary);
    }
    
    .fund-code {
        background: var(--bg-primary);
    }
}

/* ============================================
   动画效果
   ============================================ */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

/* 数据更新闪烁效果 */
@keyframes flash {
    0%, 100% { background-color: transparent; }
    50% { background-color: rgba(37, 99, 235, 0.1); }
}

.data-updated {
    animation: flash 0.5s ease;
}

/* 高溢价率脉冲效果 */
@keyframes premiumPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.premium-pulse {
    animation: premiumPulse 2s infinite;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--text-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* 选中文字样式 */
::selection {
    background: rgba(37, 99, 235, 0.2);
    color: var(--primary-color);
}