/* ========================================
   Design System — Dark Navy (StrategyPro)
   ======================================== */

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #0f1420;
    --bg-card: #111827;
    --bg-card-hover: #1a2332;
    --bg-input: #0d1219;
    --border: #1e293b;
    --border-hover: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --accent-dim: rgba(99, 102, 241, 0.15);
    --success: #22c55e;
    --success-dim: rgba(34, 197, 94, 0.12);
    --danger: #ef4444;
    --danger-dim: rgba(239, 68, 68, 0.12);
    --warning: #f59e0b;
    --warning-dim: rgba(245, 158, 11, 0.12);
    --blue: #3b82f6;
    --blue-dim: rgba(59, 130, 246, 0.12);
    --purple: #a78bfa;
    --purple-dim: rgba(167, 139, 250, 0.12);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow-card: 0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
    --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.4);
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
    --transition: 150ms ease;
}

/* ========== Reset & Base ========== */

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

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-secondary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ========== Layout ========== */

.app-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.topbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 24px;
}

.topbar-brand {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.topbar-brand .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
}

/* Strategy selector */
.strategy-selector {
    display: flex;
    align-items: center;
    gap: 6px;
}

.strategy-label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.strategy-dropdown {
    background: var(--accent-dim);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: 5px 10px;
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%236366f1'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 24px;
}

.strategy-dropdown:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--accent-hover);
}

.strategy-dropdown option {
    background: var(--bg-card);
    color: var(--text-primary);
}

.strategy-divider {
    width: 1px;
    height: 24px;
    background: var(--border);
}

.nav-tabs {
    display: flex;
    gap: 2px;
    height: 56px;
    align-items: stretch;
}

.nav-tab {
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    border-bottom: 2px solid transparent;
    transition: all var(--transition);
    cursor: pointer;
}

.nav-tab:hover {
    color: var(--text-secondary);
}

.nav-tab.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 12px;
    color: var(--text-muted);
}

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

.status-dot.live { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-dot.offline { background: var(--danger); }

.main-content {
    flex: 1;
    padding: 24px;
    max-width: 1440px;
    margin: 0 auto;
    width: 100%;
}

/* ========== Stat Cards (top row) ========== */

.stat-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-md);
    padding: 20px;
    transition: all var(--transition);
    box-shadow: var(--shadow-card);
}

.stat-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-card-hover);
}

.stat-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    line-height: 1;
}

.stat-value.positive { color: var(--success); }
.stat-value.negative { color: var(--danger); }
.stat-value.accent { color: var(--accent); }

.stat-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
}

/* ========== Bucket Cards ========== */

.bucket-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.bucket-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition);
}

.bucket-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-card-hover);
}

.bucket-header {
    padding: 16px 20px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
}

.bucket-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.badge {
    font-size: 10px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-live { background: var(--success-dim); color: var(--success); }
.badge-offline { background: var(--danger-dim); color: var(--danger); }
.badge-degraded { background: var(--warning-dim); color: var(--warning); }

.bucket-body { padding: 16px 20px; }

.bucket-section-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.bucket-section-label.today { color: var(--accent); }
.bucket-section-label.alltime { color: var(--text-muted); margin-top: 16px; }

.bucket-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.bucket-metric {
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    padding: 10px;
    text-align: center;
}

.bucket-metric .val {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.bucket-metric .val.positive { color: var(--success); }
.bucket-metric .val.negative { color: var(--danger); }

.bucket-metric .lbl {
    font-size: 9px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-top: 3px;
    letter-spacing: 0.3px;
}

/* Capital utilization bar */
.capital-bar-container {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.capital-bar-label {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    margin-bottom: 6px;
}

.capital-bar-label .lbl { color: var(--text-muted); }
.capital-bar-label .val { color: var(--text-primary); font-weight: 600; }

.capital-bar {
    height: 6px;
    background: var(--bg-primary);
    border-radius: 3px;
    overflow: hidden;
}

.capital-bar-fill {
    height: 100%;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
    transition: width 0.5s ease;
}

/* Positions expandable */
.positions-toggle {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
}

.positions-toggle-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 11px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 0;
    font-family: var(--font);
}

.positions-toggle-btn:hover { color: var(--text-secondary); }

.positions-list {
    display: none;
    margin-top: 8px;
}

.positions-list.open { display: block; }

.position-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 5px 0;
    font-size: 11px;
    border-bottom: 1px solid var(--border);
}

.position-row:last-child { border-bottom: none; }

.position-symbol { color: var(--text-primary); font-weight: 500; min-width: 60px; }
.position-qty { color: var(--text-muted); min-width: 60px; }
.position-pnl { font-weight: 600; }
.position-pnl.positive { color: var(--success); }
.position-pnl.negative { color: var(--danger); }

/* ========== Section container ========== */

.section-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 24px;
    box-shadow: var(--shadow-card);
}

.section-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.section-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.section-body {
    padding: 20px;
}

/* ========== Charts (canvas container) ========== */

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* ========== Kanban Pipeline ========== */

.pipeline-flow {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 0;
    margin-bottom: 16px;
    font-size: 12px;
    color: var(--text-muted);
}

.pipeline-step-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
}

.pipeline-step-num {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
    color: var(--text-muted);
}

.pipeline-arrow { color: var(--border); font-size: 14px; }

.kanban {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 8px;
    min-height: calc(100vh - 280px);
}

.kanban-column {
    flex: 0 0 300px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 280px);
}

.kanban-column-header {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
}

.kanban-column-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.kanban-column-title h3 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.kanban-count {
    font-size: 10px;
    padding: 2px 8px;
    background: var(--border);
    border-radius: 10px;
    color: var(--text-muted);
}

.kanban-column-desc {
    font-size: 10px;
    color: var(--text-muted);
    line-height: 1.4;
}

.kanban-sort {
    margin-top: 8px;
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 5px 8px;
    color: var(--text-secondary);
    font-size: 11px;
    font-family: var(--font);
}

.kanban-cards {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.kanban-cards::-webkit-scrollbar { width: 4px; }
.kanban-cards::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* Column accent colors */
.kanban-column.col-queued .kanban-column-header { border-left: 3px solid var(--blue); }
.kanban-column.col-active .kanban-column-header { border-left: 3px solid var(--success); }
.kanban-column.col-removed .kanban-column-header { border-left: 3px solid var(--danger); }

/* ========== Pair Card ========== */

.pair-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    margin-bottom: 8px;
    transition: all var(--transition);
    position: relative;
}

.pair-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-card-hover);
}

.pair-card.trading {
    border-left: 3px solid var(--success);
}

.pair-card.trading::after {
    content: '';
    position: absolute;
    top: 10px;
    right: 10px;
    width: 7px;
    height: 7px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

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

.pair-card-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.pair-card-link {
    text-decoration: none;
    color: var(--text-primary);
    transition: color var(--transition);
}

.pair-card-link:hover {
    color: var(--accent);
}

.pair-card-link {
    text-decoration: none;
    color: var(--text-primary);
    transition: color var(--transition);
}

.pair-card-link:hover {
    color: var(--accent);
}

.pair-card-sector {
    font-size: 9px;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 3px;
    max-width: 70px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pair-card-body {
    display: flex;
    gap: 6px;
}

.pair-card-section {
    flex: 1;
    padding: 6px 8px;
    background: var(--bg-primary);
    border-radius: 4px;
}

.pair-card-section.backtest { border-left: 2px solid var(--purple); }
.pair-card-section.live { border-left: 2px solid var(--success); }

.pair-section-title {
    font-size: 8px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.pair-section-title.backtest { color: var(--purple); }
.pair-section-title.live { color: var(--success); }

.pair-metrics { display: flex; flex-direction: column; gap: 2px; }

.pair-metric {
    display: flex;
    justify-content: space-between;
    font-size: 10px;
}

.pair-metric-label { color: var(--text-muted); }
.pair-metric-value { color: var(--text-secondary); font-weight: 500; }
.pair-metric-value.good { color: var(--success); }
.pair-metric-value.bad { color: var(--danger); }
.pair-metric-value.warn { color: var(--warning); }
.pair-metric-value.na { color: var(--text-muted); font-style: italic; }

.pair-card-footer {
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pair-badge {
    font-size: 8px;
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: 700;
    text-transform: uppercase;
}

.pair-badge.trading { background: var(--success-dim); color: var(--success); }
.pair-badge.waiting { background: var(--border); color: var(--text-muted); }
.pair-badge.flagged { background: var(--danger-dim); color: var(--danger); }

.health-bar {
    width: 40px;
    height: 3px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.health-bar-fill { height: 100%; border-radius: 2px; }
.health-bar-fill.green { background: var(--success); }
.health-bar-fill.yellow { background: var(--warning); }
.health-bar-fill.red { background: var(--danger); }

.empty-state {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 11px;
}

/* ========== Filter Bar ========== */

.filter-bar {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.filter-label {
    font-size: 11px;
    color: var(--text-muted);
}

.filter-input {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 8px;
    color: var(--text-secondary);
    font-size: 11px;
    width: 70px;
    font-family: var(--font);
}

.filter-input:focus { outline: none; border-color: var(--accent); }

.filter-select {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 8px;
    color: var(--text-secondary);
    font-size: 11px;
    min-width: 100px;
    font-family: var(--font);
}

.btn {
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    font-family: var(--font);
    transition: all var(--transition);
}

.btn-accent { background: var(--accent); color: white; }
.btn-accent:hover { background: var(--accent-hover); }
.btn-muted { background: var(--border); color: var(--text-muted); }
.btn-muted:hover { background: var(--border-hover); color: var(--text-secondary); }

/* ========== Tables ========== */

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

.data-table th,
.data-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    background: var(--bg-primary);
    position: sticky;
    top: 0;
}

.data-table td { color: var(--text-secondary); }
.data-table tr:hover td { background: var(--bg-card-hover); }

.positive { color: var(--success) !important; }
.negative { color: var(--danger) !important; }
.muted { color: var(--text-muted) !important; }

/* ========== Bucket Tabs (trades page) ========== */

.bucket-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
}

.bucket-tab {
    padding: 8px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    background: var(--bg-card);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font);
    transition: all var(--transition);
}

.bucket-tab:hover { color: var(--text-secondary); border-color: var(--border-hover); }

.bucket-tab.active {
    color: var(--accent);
    border-color: var(--accent);
    border-bottom-color: var(--bg-primary);
    background: var(--bg-primary);
}

/* ========== Loading ========== */

.loading {
    text-align: center;
    color: var(--text-muted);
    padding: 40px;
    font-size: 13px;
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ========== Refresh indicator ========== */

.refresh-bar {
    position: fixed;
    bottom: 16px;
    right: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    font-size: 10px;
    color: var(--text-muted);
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ========== Responsive ========== */

@media (max-width: 1200px) {
    .stat-row { grid-template-columns: repeat(2, 1fr); }
    .bucket-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .stat-row { grid-template-columns: 1fr; }
    .main-content { padding: 16px; }
    .topbar { padding: 0 16px; }
    .nav-tabs { display: none; }
}