:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --success: #22c55e;
    --danger: #ef4444;
    --border: #334155;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 10px;
}

h1 {
    margin: 0;
    font-size: 24px;
    font-weight: 600;
}

.status-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    white-space: nowrap;
}

.status-badge.online {
    color: var(--success);
    border-color: var(--success);
}

.status-badge.offline {
    color: var(--danger);
    border-color: var(--danger);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border);
    transition: transform 0.2s;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 8px;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.metric {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 14px;
}

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

.metric-value {
    font-weight: 500;
}

.orderbook-section {
    margin-top: 40px;
}

.orderbook-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    align-items: center;
}

select, button {
    background-color: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    min-width: 0;
}

button:hover {
    background-color: var(--accent);
    border-color: var(--accent);
}

.orderbook-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.orderbook-side {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 16px;
    border: 1px solid var(--border);
    overflow-x: auto;
    min-width: 0;
}

.orderbook-table {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Consolas', monospace;
    font-size: 13px;
    table-layout: fixed;
}

.orderbook-table th {
    text-align: right;
    padding: 8px 4px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    font-size: 12px;
}

.orderbook-table td {
    text-align: right;
    padding: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.text-green { color: var(--success); }
.text-red { color: var(--danger); }

.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

#last-update {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Responsive breakpoints */
@media (max-width: 1024px) {
    .grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 768px) {
    body {
        padding: 12px;
    }

    h1 {
        font-size: 20px;
    }

    .grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .orderbook-container {
        grid-template-columns: 1fr;
    }

    .orderbook-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .orderbook-controls select,
    .orderbook-controls button {
        width: 100%;
    }

    .card {
        padding: 14px;
    }

    .orderbook-table {
        font-size: 11px;
    }

    .orderbook-table th,
    .orderbook-table td {
        padding: 3px 2px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 8px;
    }

    h1 {
        font-size: 18px;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
    }

    .orderbook-side {
        padding: 10px;
    }
}