:root {
    --bg: #f8fafc;
    --card: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --muted: #64748b;
    --green: #16a34a;
    --red: #dc2626;
    --accent: #6366f1;
    --accent-light: rgba(99, 102, 241, 0.08);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

/* =========================
   Header
========================= */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    background: var(--card);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.brand {
    display: flex;
    align-items: center;
    gap: 0;
}

.brand-logo {
    height: 52px;
    width: auto;
}

.brand h1 {
    margin: 0;
    font-size: 22px;
}

.subtitle {
    font-size: 12px;
    color: var(--muted);
}

.status {
    font-size: 13px;
    color: var(--muted);
    display: flex;
    align-items: center;
}

#connection-status {
    color: var(--green);
    margin-right: 12px;
}

.logout-btn {
    background: transparent;
    border: 1px solid rgba(220, 38, 38, 0.25);
    border-radius: 6px;
    color: #ef4444;
    font-size: 11px;
    font-weight: 600;
    padding: 4px 12px;
    margin-left: 12px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.logout-btn:hover {
    background: rgba(220, 38, 38, 0.08);
    border-color: #ef4444;
}

/* =========================
   KPI Strip
========================= */
.kpi-strip {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
    padding: 16px 20px;
}

.kpi {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 12px 10px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.kpi label {
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.kpi .value {
    font-size: clamp(15px, 1.5vw, 22px);
    margin-top: 4px;
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    color: var(--text);
}

/* =========================
   Clear Filters Bar
========================= */
.clear-filters-bar {
    display: none;
    align-items: center;
    justify-content: space-between;
    padding: 8px 24px;
    background: var(--accent-light);
    border-bottom: 1px solid rgba(99, 102, 241, 0.15);
}

.clear-filters-bar.visible {
    display: flex;
}

.clear-filters-label {
    font-size: 12px;
    color: var(--accent);
    font-weight: 500;
}

.clear-filters-btn {
    background: transparent;
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: 6px;
    color: var(--accent);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 12px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.clear-filters-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--accent);
}

/* =========================
   Content & Cards
========================= */
.content {
    padding: 24px;
    display: grid;
    gap: 24px;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    box-shadow: var(--shadow);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header--toggle {
    cursor: pointer;
    user-select: none;
    transition: opacity 0.15s;
}

.card-header--toggle:hover {
    opacity: 0.85;
}

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

.card-header h2 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
}

/* Collapse button */
.collapse-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--muted);
    padding: 4px 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: color 0.2s, border-color 0.2s;
}

.collapse-btn:hover {
    color: var(--text);
    border-color: var(--text);
}

.chevron {
    transition: transform 0.3s ease;
}

.card-header--toggle.collapsed .chevron {
    transform: rotate(-90deg);
}

/* Collapsible panel */
.collapsible {
    max-height: 50000px;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 1;
}

#historical-collapsible .table-wrapper {
    max-height: 600px;
    overflow-y: auto;
}

#historical-table thead th {
    position: sticky;
    top: 0;
    background: var(--card);
    z-index: 2;
}

.historical-filter-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
}

.historical-filter-bar label {
    font-size: 13px;
    color: var(--muted);
    font-weight: 500;
}

.historical-filter-bar select {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 13px;
    padding: 5px 10px;
    cursor: pointer;
}

.historical-filter-bar select:focus {
    outline: none;
    border-color: var(--accent, #3b82f6);
}

.delivery-chart-header .toggle-btn {
    padding: 4px 8px;
    font-size: 11px;
}

.collapsible.collapsed {
    max-height: 0;
    opacity: 0;
}

.placeholder {
    color: var(--muted);
}

/* =========================
   Table
========================= */
.table-wrapper {
    overflow-x: auto;
    margin-top: 12px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
}

/* Header cells */
thead th {
    font-size: 11px;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 10px 12px;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

/* Body cells */
tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    font-size: 13px;
}

/* Zebra striping */
tbody tr.holdings-row:nth-child(4n+1) {
    background: rgba(248, 250, 252, 0.5);
}

tbody tr.holdings-row:hover {
    background: var(--accent-light);
}

/* Alignment — col 1 (expand) center, col 2 (Stock) and col 3 (Sector) left-aligned */
th:nth-child(1),
td:nth-child(1) {
    text-align: center;
}

th:nth-child(2),
td:nth-child(2),
th:nth-child(3),
td:nth-child(3) {
    text-align: left;
}

/* Numeric columns right-aligned */
th:nth-child(4),
th:nth-child(5),
th:nth-child(6),
th:nth-child(7),
th:nth-child(8),
th:nth-child(9),
td:nth-child(4),
td:nth-child(5),
td:nth-child(6),
td:nth-child(7),
td:nth-child(8),
td:nth-child(9) {
    text-align: right;
}

/* Stock symbol emphasis */
.symbol {
    font-weight: 600;
    letter-spacing: 0.03em;
    color: var(--text);
}

/* Sector pill */
.sector-pill {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.02em;
    background: var(--accent-light);
    color: var(--accent);
    white-space: nowrap;
}

.sector-pill--clickable {
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
}

.sector-pill--clickable:hover {
    background: rgba(99, 102, 241, 0.15);
    transform: scale(1.02);
}

.sector-unknown {
    background: rgba(100, 116, 139, 0.08);
    color: var(--muted);
}

/* Sortable headers */
.sortable {
    cursor: pointer;
    user-select: none;
    transition: color 0.15s;
}

.sortable:hover {
    color: var(--text);
}

.sort-icon {
    font-size: 10px;
    opacity: 0.4;
}

.sort-icon::after {
    content: "\21C5";
}

.sortable.sort-asc .sort-icon::after {
    content: "\25B2";
}

.sortable.sort-desc .sort-icon::after {
    content: "\25BC";
}

.sortable.sort-asc .sort-icon,
.sortable.sort-desc .sort-icon {
    opacity: 1;
    color: var(--accent);
}

/* Filter row */
.filter-row th {
    padding: 4px 12px 8px;
    border-bottom: 1px solid var(--border);
}

/* =========================
   Multi-Select Dropdown
========================= */
.multi-select {
    position: relative;
}

.multi-select-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 4px 8px;
    font-size: 11px;
    color: var(--text);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    min-height: 26px;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.multi-select-display:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.15);
}

.multi-select-placeholder {
    color: var(--muted);
    opacity: 0.7;
    font-size: 11px;
}

.multi-select-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 3px;
    flex: 1;
}

.multi-select-tag {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 1px 6px;
    font-size: 10px;
    background: var(--accent-light);
    color: var(--accent);
    border-radius: 8px;
    white-space: nowrap;
}

.multi-select-tag-remove {
    cursor: pointer;
    font-size: 12px;
    line-height: 1;
    opacity: 0.7;
}

.multi-select-tag-remove:hover {
    opacity: 1;
}

.multi-select-arrow {
    color: var(--muted);
    flex-shrink: 0;
    margin-left: 4px;
    transition: transform 0.2s;
}

.multi-select.open .multi-select-arrow {
    transform: rotate(180deg);
}

.multi-select-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-top: 2px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.multi-select.open .multi-select-dropdown {
    display: block;
}

.multi-select-search {
    width: 100%;
    padding: 6px 8px;
    font-size: 11px;
    color: var(--text);
    background: var(--bg);
    border: none;
    border-bottom: 1px solid var(--border);
    outline: none;
}

.multi-select-search::placeholder {
    color: var(--muted);
    opacity: 0.5;
}

.multi-select-option {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 8px;
    font-size: 11px;
    color: var(--text);
    cursor: pointer;
    transition: background 0.1s;
}

.multi-select-option:hover {
    background: var(--accent-light);
}

.multi-select-option input[type="checkbox"] {
    accent-color: var(--accent);
    margin: 0;
    width: 13px;
    height: 13px;
}

.multi-select-option.selected {
    color: var(--accent);
}

/* =========================
   States
========================= */
.loading {
    text-align: center;
    padding: 20px;
    color: var(--muted);
}

.positive {
    color: var(--green);
    font-weight: 600;
}

.negative {
    color: var(--red);
    font-weight: 600;
}

/* =========================
   Sector Analysis Charts
========================= */
.sector-grid {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 12px;
}

.sector-chart {
    flex: 1 1 0;
    max-width: 280px;
    min-width: 200px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px;
}

.allocation-section {
    padding: 0 8px 8px;
}

.allocation-pair {
    display: flex;
    gap: 16px;
}

.allocation-chart {
    flex: 1 1 0;
    min-width: 0;
}

.allocation-chart h5 {
    text-align: center;
    font-size: 14px;
    color: #64748b;
    margin: 0 0 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.chart-box--alloc {
    height: 350px;
}

.sector-chart--bar {
    max-width: none;
    min-width: 300px;
}

.sector-chart h4 {
    margin: 0 0 8px 0;
    font-size: 14px;
    color: var(--muted);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sector-chart .chart-box {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.sector-chart .chart-box canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
}

/* =========================
   Drilldown Bar Chart
========================= */
.sector-chart--drilldown {
    flex: 1 1 0;
    max-width: none;
    min-width: 300px;
}

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

.drilldown-header h4 {
    margin: 0;
    text-align: left;
}

.drilldown-toggles {
    display: flex;
    gap: 6px;
    align-items: center;
}

.toggle-group {
    display: flex;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
    background: var(--bg);
}

.toggle-btn {
    background: transparent;
    border: none;
    color: var(--muted);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 5px 12px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.toggle-btn:not(:last-child) {
    border-right: 1px solid var(--border);
}

.toggle-btn.active {
    background: var(--accent-light);
    color: var(--accent);
}

.toggle-btn:hover:not(.active) {
    color: var(--text);
}

.chart-box--drilldown {
    height: 260px;
}

/* =========================
   Responsive
========================= */
@media (max-width: 1200px) {
    .kpi-strip {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .kpi-strip {
        grid-template-columns: repeat(2, 1fr);
    }

    .allocation-pair {
        flex-direction: column;
    }

    .sector-grid {
        flex-direction: column;
    }

    .sector-chart {
        width: 100%;
        max-width: none;
    }

    .clear-filters-bar {
        flex-direction: column;
        gap: 6px;
        text-align: center;
    }

    thead {
        display: none;
    }

    tbody td {
        display: block;
        text-align: right;
        padding-left: 50%;
        position: relative;
    }

    tbody td::before {
        content: attr(data-label);
        position: absolute;
        left: 12px;
        color: var(--muted);
        font-size: 11px;
    }
}

/* =========================
   Delivery Volume Charts
========================= */
.expand-cell {
    width: 30px;
    text-align: center !important;
    padding: 8px 4px !important;
}

.expand-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--muted);
    font-size: 10px;
    width: 22px;
    height: 22px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, border-color 0.2s, transform 0.2s;
}

.expand-btn:hover {
    color: var(--text);
    border-color: var(--text);
}

.expand-btn.expanded {
    transform: rotate(90deg);
    color: var(--accent);
    border-color: var(--accent);
}

.delivery-detail-row.hidden {
    display: none;
}

.delivery-chart-cell {
    padding: 0 !important;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
}

.delivery-chart-wrapper {
    padding: 12px 16px;
}

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

.delivery-chart-header h4 {
    margin: 0;
    font-size: 12px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.price-chart-box {
    position: relative;
    width: 100%;
    height: 120px;
    margin-bottom: 0;
}

.price-chart-box canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
}

.delivery-chart-box {
    position: relative;
    width: 100%;
    height: 200px;
}

.delivery-chart-box canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
}

.delivery-loading {
    text-align: center;
    padding: 20px;
    color: var(--muted);
    font-size: 12px;
}

/* =========================
   Section Reorder Buttons
========================= */
.card-header-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.reorder-btn {
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--muted);
    font-size: 10px;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
    line-height: 1;
}

.reorder-btn:hover:not(:disabled) {
    color: var(--text);
    border-color: var(--text);
    background: var(--accent-light);
}

.reorder-btn:disabled {
    opacity: 0.3;
    cursor: default;
}

/* =========================
   Comparative Analysis
========================= */
.comparative-controls {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 8px 8px;
    flex-wrap: wrap;
}

.index-toggles {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.index-toggle-label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--text);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}

.index-toggle-label input[type="checkbox"] {
    accent-color: var(--accent);
    width: 14px;
    height: 14px;
    margin: 0;
}

.index-color-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.chart-box--comparative {
    position: relative;
    height: 380px;
    padding: 0 8px 8px;
}

.chart-box--comparative canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
}