/* Dark theme dashboard */
:root {
    --bg: #0d0d1a;
    --card-bg: #1a1a2e;
    --card-border: #2a2a4a;
    --text: #e0e0e0;
    --text-dim: #8888aa;
    --green: #00e676;
    --red: #ff5252;
    --blue: #448aff;
    --yellow: #ffd740;
    --header-bg: #12122a;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 13px;
    line-height: 1.4;
    min-height: 100vh;
}

/* Header */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

.symbol {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
}

.mode-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 3px;
    text-transform: uppercase;
}

.mode-badge.paper {
    background: var(--yellow);
    color: #000;
}

.mode-badge.live {
    background: var(--red);
    color: #fff;
}

.header-center {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-label {
    color: var(--text-dim);
    font-size: 11px;
    margin-left: 12px;
}

.header-value {
    font-weight: 600;
    font-size: 13px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-dot.connected {
    background: var(--green);
    box-shadow: 0 0 6px var(--green);
}

.status-dot.disconnected {
    background: var(--red);
    box-shadow: 0 0 6px var(--red);
}

/* Charts Row */
.charts-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 8px;
}

.chart-container {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    overflow: hidden;
}

.chart-title {
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--card-border);
}

#price-chart,
#pnl-chart {
    height: 220px;
}

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 8px;
    padding: 0 8px 8px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    overflow: hidden;
}

.card-wide {
    grid-column: span 2;
}

.card-title {
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--card-border);
}

.card-body {
    padding: 8px 12px;
}

/* Metric Rows */
.metric-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 3px 0;
}

.metric-label {
    color: var(--text-dim);
    font-size: 12px;
}

.metric-value {
    font-weight: 600;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

.metric-value.bold {
    font-size: 15px;
}

.metric-value.bid,
.pnl-positive {
    color: var(--green);
}

.metric-value.ask,
.pnl-negative {
    color: var(--red);
}

.pnl-zero {
    color: var(--text);
}

/* Depth Visualization */
.depth-container {
    padding: 8px 12px;
}

.depth-row {
    display: grid;
    grid-template-columns: 100px 70px 1fr;
    gap: 6px;
    align-items: center;
    padding: 2px 0;
    font-size: 12px;
}

.depth-price {
    text-align: right;
    font-weight: 600;
}

.depth-price.bid {
    color: var(--green);
}

.depth-price.ask {
    color: var(--red);
}

.depth-qty {
    text-align: right;
    color: var(--text-dim);
}

.depth-bar-container {
    height: 16px;
    position: relative;
}

.depth-bar {
    height: 100%;
    border-radius: 2px;
    min-width: 2px;
    transition: width 0.3s ease;
}

.depth-bar.bid-bar {
    background: rgba(0, 230, 118, 0.3);
    border: 1px solid rgba(0, 230, 118, 0.5);
}

.depth-bar.ask-bar {
    background: rgba(255, 82, 82, 0.3);
    border: 1px solid rgba(255, 82, 82, 0.5);
}

.depth-separator {
    text-align: center;
    color: var(--text-dim);
    padding: 4px 0;
    font-size: 11px;
    border-top: 1px dashed var(--card-border);
    border-bottom: 1px dashed var(--card-border);
    margin: 2px 0;
}

/* Nav links */
.nav-link {
    color: var(--blue);
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    padding: 2px 8px;
    border: 1px solid var(--blue);
    border-radius: 3px;
    transition: background 0.2s, color 0.2s;
}

.nav-link:hover {
    background: var(--blue);
    color: #fff;
}

.nav-link.active {
    background: var(--blue);
    color: #fff;
}

/* Backtest Page */
.backtest-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--card-border);
}

.backtest-header h1 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    margin: 0;
}

.backtest-form {
    display: flex;
    align-items: center;
    gap: 10px;
}

.backtest-form label {
    color: var(--text-dim);
    font-size: 12px;
}

.backtest-form input,
.backtest-form select {
    background: var(--bg);
    border: 1px solid var(--card-border);
    color: var(--text);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: inherit;
    font-size: 12px;
    width: 100px;
}

.backtest-form select {
    width: 70px;
}

.btn-run {
    background: var(--blue);
    color: #fff;
    border: none;
    padding: 6px 16px;
    border-radius: 4px;
    font-family: inherit;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
}

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

.btn-run:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.bt-status {
    color: var(--text-dim);
    font-size: 12px;
    min-width: 120px;
    text-align: right;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 8px;
    padding: 8px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    padding: 10px 14px;
    text-align: center;
}

.stat-label {
    font-size: 11px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 18px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.bt-charts-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 0 8px;
}

.bt-chart-container {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    overflow: hidden;
}

.bt-chart-title {
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--card-border);
}

#bt-candle-chart,
#bt-equity-chart {
    height: 300px;
}

.trade-table-container {
    margin: 8px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    overflow: hidden;
}

.trade-table-title {
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--card-border);
}

.trade-table-wrap {
    max-height: 400px;
    overflow-y: auto;
}

.trade-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

.trade-table th {
    position: sticky;
    top: 0;
    background: var(--card-bg);
    color: var(--text-dim);
    font-weight: 600;
    text-align: left;
    padding: 6px 10px;
    border-bottom: 1px solid var(--card-border);
}

.trade-table td {
    padding: 4px 10px;
    border-bottom: 1px solid rgba(42, 42, 74, 0.5);
}

.trade-table tr:hover {
    background: rgba(68, 138, 255, 0.08);
}

.trade-table .buy {
    color: var(--green);
}

.trade-table .sell {
    color: var(--red);
}

/* Optimizer Page */
.optimizer-params {
    margin: 8px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    overflow: hidden;
}

.opt-section-title {
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--card-border);
}

.opt-param-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 8px;
    padding: 10px 12px;
}

.opt-param {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.opt-param label {
    font-size: 11px;
    color: var(--text-dim);
    font-weight: 600;
}

.opt-param input {
    background: var(--bg);
    border: 1px solid var(--card-border);
    color: var(--text);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: inherit;
    font-size: 12px;
}

.opt-param input:focus {
    border-color: var(--blue);
    outline: none;
}

.opt-results {
    padding: 0 8px;
}

.param-cell {
    font-size: 11px;
    color: var(--text-dim);
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Strategy Comparison Grid */
.strategy-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 8px;
    padding: 0 8px 8px;
}

.strategy-column {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    overflow: visible;
}

.strat-header {
    padding: 8px 12px;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: visible;
}

.strat-label {
    font-size: 14px;
    font-weight: 700;
}

.strat-label-hover {
    position: relative;
    cursor: help;
    border-bottom: 1px dashed currentColor;
}

.strat-tooltip {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    background: #1e1e3a;
    border: 1px solid var(--blue);
    border-radius: 6px;
    padding: 10px 14px;
    font-size: 12px;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text);
    z-index: 99999;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.7);
    pointer-events: none;
    min-width: 280px;
    max-width: 400px;
    white-space: normal;
}

.strat-tooltip::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 16px;
    border: 6px solid transparent;
    border-bottom-color: var(--blue);
}

.strat-label-hover:hover .strat-tooltip {
    display: block;
}

.strat-tag {
    font-size: 11px;
    color: var(--text-dim);
}

.strat-body {
    padding: 8px 12px;
}

/* Responsive */
@media (max-width: 800px) {
    .charts-row {
        grid-template-columns: 1fr;
    }
    .cards-grid {
        grid-template-columns: 1fr;
    }
    .card-wide {
        grid-column: span 1;
    }
    .header-center {
        display: none;
    }
    .strategy-comparison {
        grid-template-columns: 1fr;
    }
}