/* 配色参考 Vercel Geist / Grok 的极简暗色系：近黑底、细边框、单一蓝色强调 */
:root {
    /* 强调色（Vercel 蓝） */
    --accent: #0070f3;
    --accent-hover: #3291ff;

    /* 图表 / 语义 */
    --strategy-color: #3291ff;
    --benchmark-color: #8f8f8f;
    --positive: #0cce6b;
    --negative: #f75f5f;
    --danger-color: #f75f5f;

    /* 背景层级 */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-input: #0d0d0d;

    /* 文本 */
    --text-primary: #ededed;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;

    /* 边框 */
    --border-color: #262626;
    --border-strong: #383838;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.5);

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --font-family: 'Inter', ui-sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: ui-monospace, 'SFMono-Regular', 'Menlo', 'Consolas', monospace;
}

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

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Loading */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 42px;
    height: 42px;
    border: 2px solid var(--border-strong);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay p {
    margin-top: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

.title {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.title-icon {
    font-size: 1.8rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    font-weight: 400;
}

.update-time {
    margin-top: var(--spacing-md);
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

@media (max-width: 1024px) {
    .metrics-grid {
        grid-template-columns: 1fr;
    }
}

.metric-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: border-color 0.2s ease;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.metric-card:hover {
    border-color: var(--border-strong);
}

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

.metric-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.metric-badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border: 1px solid var(--border-color);
}

.metric-badge.strategy {
    background: rgba(50, 145, 255, 0.10);
    color: var(--strategy-color);
    border-color: rgba(50, 145, 255, 0.25);
}

.metric-badge.benchmark {
    background: rgba(143, 143, 143, 0.12);
    color: var(--benchmark-color);
}

.metric-badge.factor {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

/* Performance Comparison */
.performance-card .badges {
    display: flex;
    gap: 0.5rem;
}

.comparison-layout {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    justify-content: center;
    flex: 1;
}

.comparison-row {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    align-items: center;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
}

.comparison-row:last-child {
    border-bottom: none;
}

.comparison-row.header-row {
    padding-bottom: 0.5rem;
    margin-bottom: 0.25rem;
}

.col-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.col-value {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 1.05rem;
    color: var(--text-secondary);
    text-align: right;
}

.col-value.highlight {
    font-weight: 700;
    color: var(--text-primary);
}

.col-value.danger {
    color: var(--negative);
}

.strategy-text {
    color: var(--strategy-color);
    font-weight: 600;
    text-align: right;
}

.benchmark-text {
    color: var(--benchmark-color);
    font-weight: 600;
    text-align: right;
}

/* Factor List */
.metric-body.scrollable-body {
    padding-right: 4px;
    overflow: visible;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.factor-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 9px 12px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.88rem;
    color: var(--text-secondary);
    transition: background-color 0.15s;
}

.factor-list-item:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

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

.factor-list-item.top-pick {
    color: var(--strategy-color);
    font-weight: 600;
    background: rgba(50, 145, 255, 0.08);
    border-radius: var(--radius-sm);
    border-bottom: none;
    margin-bottom: 2px;
}

.factor-list-item .score {
    font-family: var(--font-mono);
    opacity: 0.95;
}

/* Chart */
.chart-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.section-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.chart-legend {
    display: flex;
    gap: var(--spacing-md);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.legend-item.strategy .legend-dot {
    background: var(--strategy-color);
}

.legend-item.benchmark .legend-dot {
    background: var(--benchmark-color);
}

.chart-container {
    height: 400px;
    width: 100%;
}

/* Rebalance & Tables */
.rebalance-section,
.table-section,
.prices-section,
.config-section {
    margin-bottom: var(--spacing-xl);
}

.rebalance-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.rebalance-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: border-color 0.2s ease;
}

.rebalance-item:hover {
    border-color: var(--border-strong);
}

.rebalance-date {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.rebalance-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.action-group h4 {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.action-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.action-item {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 0.5rem 0.6rem;
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.positive {
    color: var(--positive);
}

.negative {
    color: var(--negative);
}

/* Factor scores inside rebalance card */
.factor-scores {
    margin-bottom: var(--spacing-sm);
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.factor-scores h4 {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.factor-scores-list {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.factor-score-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0.25rem 0.4rem;
    border-radius: 4px;
}

.factor-score-item.selected {
    color: var(--strategy-color);
    background: rgba(50, 145, 255, 0.08);
    font-weight: 600;
}

.factor-score-item .score-value {
    font-family: var(--font-mono);
}

.table-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.data-table th,
.data-table td {
    padding: 0.9rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.data-table td {
    font-family: var(--font-mono);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Prices */
.prices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-sm);
}

.price-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    text-align: center;
    transition: border-color 0.2s ease;
}

.price-card:hover {
    border-color: var(--border-strong);
}

.price-symbol {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.price-value {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-primary);
}

/* Config */
.config-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.config-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.config-group label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.config-group input,
.config-group select {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.65rem 0.75rem;
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 0.9rem;
    transition: border-color 0.15s;
}

.config-group input:focus,
.config-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.config-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.config-etf-list {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.config-etf-list > label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.etf-checkboxes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.6rem;
    margin-top: 0.75rem;
}

.etf-checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.6rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: border-color 0.15s;
}

.etf-checkbox-item:hover {
    border-color: var(--border-strong);
}

.etf-checkbox-item input {
    accent-color: var(--accent);
}

.etf-checkbox-item label {
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, opacity 0.15s;
    border: 1px solid transparent;
    font-family: var(--font-family);
}

/* Vercel 风格：暗色模式下主按钮为白底黑字 */
.btn-primary {
    background: var(--text-primary);
    color: #000;
}

.btn-primary:hover {
    opacity: 0.85;
}

.btn-secondary {
    background: transparent;
    border-color: var(--border-strong);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
}

/* Footer */
.footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

/* Current Params */
.current-params {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    padding: 0.9rem 1rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.param-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.param-label {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.param-value {
    color: var(--text-primary);
    font-weight: 600;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

@media (max-width: 640px) {
    .current-params {
        flex-direction: column;
        gap: 0.5rem;
    }

    .title {
        font-size: 1.75rem;
    }

    .rebalance-actions {
        grid-template-columns: 1fr;
    }
}