:root {
    --bg-primary: #0f1117;
    --bg-card: #1a1d29;
    --bg-card-hover: #1f2233;
    --border: #2a2d3a;
    --text-primary: #e4e6eb;
    --text-secondary: #8b8fa3;
    --text-muted: #5a5e72;
    --accent: #4f8cff;
    --green: #00c853;
    --red: #ff3d57;
    --yellow: #ffab00;
    --orange: #ff6d00;
    --card-radius: 12px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}

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

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

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-card);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.header .pair-badge {
    background: var(--accent);
    color: #fff;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
}

.status-dot.running { background: var(--green); }
.status-dot.stale { background: var(--yellow); }
.status-dot.stopped { background: var(--red); }

/* Layout */
.dashboard {
    padding: 20px 24px;
    max-width: 1400px;
    margin: 0 auto;
}

.row {
    display: grid;
    gap: 16px;
    margin-bottom: 16px;
}

.row-3 { grid-template-columns: repeat(3, 1fr); }
.row-2 { grid-template-columns: repeat(2, 1fr); }
.row-4 { grid-template-columns: repeat(4, 1fr); }

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--card-radius);
    padding: 20px;
}

.card-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

/* Metric cards */
.metric-value {
    font-size: 28px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.metric-value.positive { color: var(--green); }
.metric-value.negative { color: var(--red); }

.metric-sub {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Overview stats row */
.stats-row {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.stat-item {
    flex: 1;
    min-width: 120px;
}

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

.stat-value {
    font-size: 20px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

/* Grid visualization */
.grid-levels {
    max-height: 400px;
    overflow-y: auto;
}

.grid-level {
    display: flex;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

.grid-level:last-child {
    border-bottom: none;
}

.grid-level .idx {
    width: 36px;
    color: var(--text-muted);
    font-size: 11px;
}

.grid-level .price {
    flex: 1;
    font-weight: 500;
}

.grid-level .status-tag {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

.tag-reserved {
    background: rgba(255, 171, 0, 0.15);
    color: var(--yellow);
}

.tag-free {
    background: rgba(0, 200, 83, 0.15);
    color: var(--green);
}

.tag-buy {
    background: rgba(0, 200, 83, 0.15);
    color: var(--green);
}

.tag-sell {
    background: rgba(255, 61, 87, 0.15);
    color: var(--red);
}

/* Trade table */
.trade-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}

.trade-table th {
    text-align: left;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    position: sticky;
    top: 0;
    background: var(--bg-card);
}

.trade-table td {
    padding: 7px 10px;
    border-bottom: 1px solid var(--border);
}

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

.trade-table .side-buy { color: var(--green); font-weight: 600; }
.trade-table .side-sell { color: var(--red); font-weight: 600; }

.trades-container {
    max-height: 400px;
    overflow-y: auto;
}

/* Chart container */
.chart-container {
    position: relative;
    height: 250px;
    width: 100%;
}

/* Logs */
.logs-container {
    max-height: 400px;
    overflow-y: auto;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.6;
}

.log-line {
    padding: 2px 0;
    white-space: pre-wrap;
    word-break: break-all;
}

.log-line.ERROR {
    color: var(--red);
    font-weight: 600;
}

.log-line.WARNING {
    color: var(--yellow);
}

.log-line.DEBUG {
    color: var(--text-muted);
}

.log-filters {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.log-filter-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    font-family: var(--font);
}

.log-filter-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* Refresh indicator */
.refresh-info {
    font-size: 12px;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 900px) {
    .row-3 { grid-template-columns: 1fr; }
    .row-2 { grid-template-columns: 1fr; }
    .row-4 { grid-template-columns: repeat(2, 1fr); }

    .header {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }

    .dashboard {
        padding: 12px;
    }

    .stats-row {
        gap: 12px;
    }
}

@media (max-width: 600px) {
    .row-4 { grid-template-columns: 1fr; }

    .stat-value {
        font-size: 16px;
    }

    .metric-value {
        font-size: 22px;
    }
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

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