:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #21262d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --positive: #3fb950;
    --negative: #f85149;
    --border: #30363d;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
}

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

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.logo { font-size: 1.5rem; font-weight: 600; }
.logo .domain { color: var(--accent); }
.header-right { display: flex; align-items: center; gap: 20px; }
.clock { font-size: 1.2rem; font-family: 'Courier New', monospace; color: var(--accent); }
.balance-info { display: flex; gap: 15px; font-size: 0.9rem; }

/* Main Grid */
.main-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
}
.card h2 { font-size: 1.2rem; margin-bottom: 15px; border-bottom: 1px solid var(--border); padding-bottom: 10px; }

/* Pairs Grid */
.pairs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.pair-card { background: var(--bg-secondary); padding: 10px; border-radius: 6px; border-left: 3px solid var(--accent); }
.pair-card h3 { font-size: 0.9rem; color: var(--text-secondary); }
.price { font-size: 1.1rem; font-weight: bold; }
.change { font-size: 0.8rem; }
.change.positive { color: var(--positive); }
.change.negative { color: var(--negative); }

/* Chart */
.chart-section { grid-column: span 2; }
#chart-container { background: var(--bg-secondary); border-radius: 4px; }

/* Responsive */
@media (max-width: 768px) {
    .header { flex-direction: column; gap: 10px; }
    .main-content { grid-template-columns: 1fr; }
    .chart-section { grid-column: span 1; }
}