/* ============================================
   美股走势追踪器 - iOS 风格样式
   ============================================ */

:root {
    --bg-primary: #f2f2f7;
    --bg-secondary: #ffffff;
    --text-primary: #1c1c1e;
    --text-secondary: #8e8e93;
    --accent-blue: #007aff;
    --up-color: #ff3b30;      /* 红色 = 涨（中国习惯）*/
    --down-color: #34c759;    /* 绿色 = 跌（中国习惯）*/
    --border-color: #e5e5ea;
    --card-shadow: 0 2px 12px rgba(0,0,0,0.08);
    --radius: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding-bottom: env(safe-area-inset-bottom);
    min-height: 100vh;
}

/* 顶部导航 */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-bottom: 0.5px solid var(--border-color);
}

.app-header h1 {
    font-size: 18px;
    font-weight: 600;
}

.header-left {
    width: 40px;
}

.back-btn {
    font-size: 24px;
    color: var(--accent-blue);
}

.refresh-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--bg-primary);
    font-size: 18px;
    cursor: pointer;
    transition: transform 0.3s;
}

.refresh-btn:active {
    transform: rotate(180deg);
}

.refresh-btn.spinning {
    animation: spin 1s linear infinite;
}

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

/* 基金信息卡片 */
.fund-info-card {
    margin: 16px;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius);
    color: white;
    box-shadow: var(--card-shadow);
}

.fund-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.fund-header h2 {
    font-size: 17px;
    font-weight: 600;
}

.fund-code {
    background: rgba(255,255,255,0.25);
    padding: 4px 10px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
}

.fund-desc {
    font-size: 13px;
    opacity: 0.9;
    margin-bottom: 12px;
}

.update-time {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    opacity: 0.85;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #34c759;
    animation: pulse 2s infinite;
}

.status-dot.online {
    background: #34c759;
}

.status-dot.warning {
    background: #ff9500;
}

.status-dot.loading {
    background: #007aff;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* 统计概览 */
.stats-overview {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin: 0 16px 16px;
}

.stat-item {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 14px 10px;
    text-align: center;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.stat-label {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.stat-value {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-value.up {
    color: var(--up-color);
}

.stat-value.down {
    color: var(--down-color);
}

/* 股票列表 */
.stock-list-section {
    margin: 0 16px 20px;
}

.section-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.stock-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* 单个股票卡片 */
.stock-card {
    background: var(--bg-secondary);
    border-radius: 14px;
    padding: 16px;
    display: grid;
    grid-template-columns: auto 80px 65px auto;
    align-items: center;
    gap: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

.stock-card:active {
    transform: scale(0.98);
}

.stock-card.selected {
    border: 2px solid var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(0,122,255,0.15);
}

/* 数据质量标识 */
.stock-card.real-time {
    opacity: 1;
}

.stock-card.cached {
    opacity: 0.7;
}

.stock-card.cached .stock-symbol::after {
    content: ' (缓存)';
    font-size: 10px;
    color: var(--text-secondary);
}

.stock-main {
    min-width: 0;
}

.stock-name {
    font-size: 15px;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.stock-symbol {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
}

.stock-price {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: right;
}

.change-value {
    font-size: 16px;
    font-weight: 700;
    text-align: right;
}

.change-value.up {
    color: var(--up-color);
}

.change-value.down {
    color: var(--down-color);
}

.holding-ratio {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    text-align: right;
}

.holding-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.quarter-change {
    font-size: 12px;
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 2px;
}

.quarter-change.up {
    color: var(--down-color);
}

.quarter-change.down {
    color: var(--up-color);
}

/* 加载动画 */
.loading-spinner {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}

/* 图表区域 */
.chart-section {
    margin: 0 16px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--card-shadow);
}

.chart-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.chart-tab {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: transparent;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.chart-tab.active {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

.chart-container {
    position: relative;
    height: 280px;
}

.selected-stock-info {
    text-align: center;
    padding: 12px;
    font-size: 13px;
    color: var(--text-secondary);
    border-top: 0.5px solid var(--border-color);
    margin-top: 12px;
}

/* 市场状态 */
.market-status {
    margin: 0 16px 80px;
}

.status-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 14px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

.market-icon {
    font-size: 28px;
}

.market-details {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.market-name {
    font-size: 15px;
    font-weight: 500;
}

.market-time {
    font-size: 12px;
    color: var(--text-secondary);
}

.market-state {
    font-size: 13px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 8px;
}

.market-state.open {
    background: rgba(52,199,89,0.15);
    color: #248a3d;
}

.market-state.closed {
    background: rgba(142,142,147,0.15);
    color: var(--text-secondary);
}

.market-state.pre-market {
    background: rgba(255,149,0,0.15);
    color: #c45d00;
}

/* 底部操作栏 */
.app-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 12px 20px;
    padding-bottom: calc(12px + env(safe-area-inset-bottom));
    background: var(--bg-secondary);
    border-top: 0.5px solid var(--border-color);
    z-index: 100;
}

.footer-link {
    font-size: 14px;
    color: var(--accent-blue);
    text-decoration: none;
}

.btn-backup {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: transparent;
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
}

/* 弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 200;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 20px 20px 0 0;
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    padding: 20px;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

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

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.close-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-primary);
    border-radius: 50%;
    font-size: 22px;
    cursor: pointer;
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.backup-option {
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: transparent;
    font-size: 15px;
    text-align: left;
    cursor: pointer;
    transition: background 0.2s;
}

.backup-option:active {
    background: var(--bg-primary);
}

/* Toast */
.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    background: rgba(0,0,0,0.75);
    color: white;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 14px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 300;
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

/* 响应式 */
@media (max-width: 400px) {
    .stock-card {
        grid-template-columns: auto 70px 60px auto;
        padding: 12px;
        gap: 6px;
    }

    .stock-name {
        font-size: 14px;
    }

    .stock-price {
        font-size: 13px;
    }

    .change-value {
        font-size: 14px;
    }

    .stats-overview {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-item {
        padding: 12px 8px;
    }

    .stat-value {
        font-size: 18px;
    }
}

/* 安全区域适配 */
@supports (padding: env(safe-area-inset-bottom)) {
    .modal-content {
        padding-bottom: calc(env(safe-area-inset-bottom) + 20px);
    }
}