:root {
    --sidebar-w: 240px;
}

.db-layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-w); min-width: var(--sidebar-w);
    background: var(--bg-card); border-right: 1px solid var(--border);
    display: flex; flex-direction: column; position: fixed;
    top: 0; left: 0; height: 100vh; z-index: 50; padding: 20px 16px;
}
.sidebar .logo { padding: 0 4px 24px; display: block; }
.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.nav-item {
    display: flex; align-items: center; gap: 10px; padding: 10px 12px;
    border-radius: 8px; color: var(--text-dim); text-decoration: none;
    font-size: 0.9rem; font-weight: 500; transition: all 0.2s;
}
.nav-item:hover { color: var(--text); background: var(--bg-card-hover); }
.nav-item.active { color: var(--text); background: rgba(99, 102, 241, 0.12); }

.sidebar-footer { padding-top: 16px; border-top: 1px solid var(--border); }
.connection-status { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-dim); }
.status-dot { width: 8px; height: 8px; border-radius: 50%; }
.status-dot.connected { background: var(--green); box-shadow: 0 0 8px rgba(34, 197, 94, 0.5); }
.status-dot.disconnected { background: var(--red); }

.main-content { margin-left: var(--sidebar-w); flex: 1; padding: 28px 32px; }
.db-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px; }
.db-header h2 { font-size: 1.6rem; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.last-update { font-size: 0.8rem; color: var(--text-dim); }

.page-content { display: none; }
.page-content.active { display: block; }

.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 24px; }
.stat-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px 24px;
}
.stat-title { display: block; font-size: 0.8rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 8px; }
.stat-value { display: block; font-size: 1.5rem; font-weight: 700; }
.stat-value.up { color: var(--green); }
.stat-value.down { color: var(--red); }

.chart-row { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; }
.chart-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
}
.chart-card.large h3 { margin-bottom: 16px; }
.chart-placeholder { min-height: 300px; display: flex; align-items: center; justify-content: center; }

.placeholder-text { color: var(--text-dim); font-size: 0.9rem; }

.market-section { margin-bottom: 32px; }
.market-section h3 { font-size: 1.1rem; margin-bottom: 12px; color: var(--text); }
.market-table { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.table-header, .market-row {
    display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
    padding: 12px 20px; align-items: center;
}
.table-header { background: rgba(99, 102, 241, 0.06); font-size: 0.8rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.market-row { border-top: 1px solid var(--border); font-size: 0.9rem; }
.market-row:hover { background: var(--bg-card-hover); }
.market-row .symbol { font-weight: 600; }
.market-row .action-btns { display: flex; gap: 6px; }
.btn-xs { padding: 4px 10px; font-size: 0.75rem; border-radius: 6px; cursor: pointer; border: none; font-weight: 600; }
.btn-buy { background: rgba(34, 197, 94, 0.15); color: var(--green); }
.btn-buy:hover { background: rgba(34, 197, 94, 0.3); }
.btn-sell { background: rgba(239, 68, 68, 0.15); color: var(--red); }
.btn-sell:hover { background: rgba(239, 68, 68, 0.3); }

.order-panel { display: grid; grid-template-columns: 1fr 1.5fr; gap: 24px; }
.order-form, .orders-list {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
}
.order-form h3, .orders-list h3 { margin-bottom: 16px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px; }
.form-inline { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; }
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group label { font-size: 0.8rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.03em; }
.db-input {
    background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
    padding: 8px 12px; color: var(--text); font-size: 0.9rem; font-family: inherit;
    outline: none; transition: border-color 0.2s;
}
.db-input:focus { border-color: var(--primary); }
.order-result { display: inline-block; margin-left: 12px; font-size: 0.85rem; }
.order-result.success { color: var(--green); }
.order-result.error { color: var(--red); }

.orders-row { display: grid; grid-template-columns: 1fr 0.7fr 0.8fr 0.8fr 0.8fr 0.6fr; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 0.85rem; align-items: center; }
.orders-row.header { color: var(--text-dim); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.03em; border-bottom: 2px solid var(--border); }

.alerts-panel { display: flex; flex-direction: column; gap: 24px; }
.alert-form, .alerts-list {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px;
}
.alerts-list { min-height: 200px; }
.alert-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 16px; border-bottom: 1px solid var(--border);
}
.alert-item .alert-info { display: flex; flex-direction: column; }
.alert-item .alert-symbol { font-weight: 600; }
.alert-item .alert-cond { font-size: 0.8rem; color: var(--text-dim); }

.positions-list { min-height: 200px; }
.position-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 0; border-bottom: 1px solid var(--border);
}
.position-item .pos-symbol { font-weight: 600; }
.position-item .pos-qty { color: var(--text-dim); font-size: 0.85rem; }

@media (max-width: 900px) {
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .chart-row, .order-panel { grid-template-columns: 1fr; }
    .sidebar { display: none; }
    .main-content { margin-left: 0; }
}