:root {
    /* Colors */
    --bg-primary: #0f1115;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;

    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-tertiary: #6e7681;

    --accent-primary: #58a6ff;
    --accent-hover: #79c0ff;
    --accent-dim: rgba(88, 166, 255, 0.15);

    --success: #238636;
    --success-text: #3fb950;
    --danger: #da3633;
    --danger-text: #f85149;
    --warning: #9e6a03;
    --warning-text: #d29922;

    --border-color: #30363d;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, "Liberation Mono", Menlo, Courier, monospace;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
}

#app {
    display: flex;
    height: 100%;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent-primary), #1f6feb);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    font-size: 14px;
}

.logo-text {
    font-weight: 600;
    font-size: 18px;
    letter-spacing: -0.5px;
}

.main-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.nav-item:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: var(--accent-dim);
    color: var(--accent-primary);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
}

.avatar {
    width: 36px;
    height: 36px;
    background-color: var(--bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: var(--text-secondary);
}

.user-info {
    display: flex;
    flex-direction: column;
}

.username {
    font-weight: 500;
    font-size: 14px;
}

.status {
    font-size: 12px;
    color: var(--success-text);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    overflow: hidden;
}

.top-bar {
    height: 64px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    background-color: var(--bg-primary);
    /* Sticky header feel */
}

#page-title {
    font-size: 20px;
    font-weight: 600;
}

.actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn {
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--success);
    color: white;
    border-color: rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    background-color: #2da44e;
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

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

.content-area {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

/* Loading Spinner */
.loading-spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    font-size: 16px;
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th {
    text-align: left;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

/* Cards */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.card-title {
    font-size: 16px;
    font-weight: 600;
}

/* Utility Classes */
.text-success {
    color: var(--success-text);
}

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

.text-warning {
    color: var(--warning-text);
}

.text-mono {
    font-family: var(--font-mono);
}


.flex-row {
    display: flex;
    gap: var(--spacing-md);
}

.flex-col {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 90%;
    max-width: 1200px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

/* Tabs */
.tabs {
    display: flex;
    gap: var(--spacing-xs);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.tab {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
}

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

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

/* Drag and Drop Zones */
.drag-drop-container {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.drop-zone {
    background: var(--bg-tertiary);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    min-height: 400px;
}

.drop-zone-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.drop-zone-title {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.drop-zone.available {
    border-color: #22c5ad;
}

.drop-zone.leader {
    border-color: #ffc107;
}

.drop-zone.follower {
    border-color: #6f42c1;
}

.drop-zone.drag-over {
    background: rgba(88, 166, 255, 0.1);
    border-style: solid;
}

/* Account Cards */
.account-card {
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    cursor: move;
    transition: all var(--transition-fast);
}

.account-card:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
}

.account-card.dragging {
    opacity: 0.5;
}

.account-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.account-name {
    font-weight: 500;
    font-size: 14px;
}

.account-balance {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
}

.account-actions {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

/* Follower Config */
.follower-config {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    padding: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.config-row {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.config-row:last-child {
    margin-bottom: 0;
}

.form-group {
    flex: 1;
}

.form-label {
    display: block;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    padding: 6px 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 13px;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: rgba(88, 166, 255, 0.05);
}

.form-control:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background: var(--success);
    color: white;
}

.badge-danger {
    background: var(--danger);
    color: white;
}

.badge-warning {
    background: var(--warning);
    color: white;
}

.badge-info {
    background: var(--accent-primary);
    color: white;
}

.badge-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.status-badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: capitalize;
}

.status-connected {
    background: rgba(35, 134, 54, 0.2);
    color: var(--success-text);
}

.status-disconnected {
    background: rgba(218, 54, 51, 0.2);
    color: var(--danger-text);
}

.status-active {
    background: rgba(35, 134, 54, 0.2);
    color: var(--success-text);
}

.status-inactive {
    background: rgba(158, 106, 3, 0.2);
    color: var(--warning-text);
}

/* Button Variants */
.btn-sm {
    padding: 4px 12px;
    font-size: 12px;
}

.btn-danger {
    background-color: var(--danger);
    color: white;
    border-color: rgba(255, 255, 255, 0.1);
}

.btn-danger:hover {
    background-color: #c82333;
}

.btn-warning {
    background-color: var(--warning);
    color: white;
    border-color: rgba(255, 255, 255, 0.1);
}

.btn-warning:hover {
    background-color: #b8860b;
}

/* Alert */
.alert {
    padding: var(--spacing-md);
    border-radius: 6px;
    margin-bottom: var(--spacing-md);
    border: 1px solid transparent;
}

.alert-danger {
    background: rgba(218, 54, 51, 0.1);
    border-color: var(--danger);
    color: var(--danger-text);
}

.alert-warning {
    background: rgba(158, 106, 3, 0.1);
    border-color: var(--warning);
    color: var(--warning-text);
}

.alert-info {
    background: rgba(88, 166, 255, 0.1);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Checkbox */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.checkbox-label {
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
}

.help-text {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Enhanced Account Table */
.sortable-header {
    cursor: pointer;
    user-select: none;
    transition: background-color 0.2s ease;
}

.sortable-header:hover {
    background-color: rgba(255, 255, 255, 0.1) !important;
}

.sortable-header i {
    font-size: 0.75rem;
    margin-left: 0.5rem;
    transition: color 0.2s ease;
    opacity: 0.5;
}

.sortable-header:hover i {
    opacity: 1;
}

.sortable-header i.active {
    opacity: 1;
    color: var(--accent-primary);
}

/* Connection Status Indicator */
.connection-status {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 8px;
}

.connection-status.connected {
    background-color: var(--success-text);
    box-shadow: 0 0 4px var(--success-text);
}

.connection-status.disconnected {
    background-color: var(--danger-text);
    box-shadow: 0 0 4px var(--danger-text);
}

/* Role Icons */
.role-icon {
    font-size: 14px;
    margin-right: 4px;
}

.role-icon.leader {
    color: #ffc107;
}

.role-icon.follower {
    color: var(--accent-primary);
}

.role-icon.none {
    color: var(--text-secondary);
    opacity: 0.5;
}

/* Position Badges */
.position-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.position-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
}

.position-badge {
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
}

.position-badge.long {
    background-color: rgba(35, 134, 54, 0.2);
    color: var(--success-text);
}

.position-badge.short {
    background-color: rgba(218, 54, 51, 0.2);
    color: var(--danger-text);
}

.position-badge.flat {
    background-color: rgba(139, 148, 158, 0.2);
    color: var(--text-secondary);
}

/* P&L Styling */
.pnl-positive {
    color: var(--success-text);
    font-weight: 600;
}

.pnl-negative {
    color: var(--danger-text);
    font-weight: 600;
}

.pnl-neutral {
    color: var(--text-secondary);
}

/* Broker Logos */
.broker-logo {
    height: 16px;
    vertical-align: middle;
}

/* Flatten Button */
.btn-flatten {
    padding: 4px 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Summary Row */
.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: 6px;
    margin-top: var(--spacing-md);
}

.summary-item {
    display: flex;
    flex-direction: column;
}

.summary-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.summary-value {
    font-size: 18px;
    font-weight: 700;
    font-family: var(--font-mono);
}

/* Table Responsiveness */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    min-width: 1200px;
}

.data-table th {
    white-space: nowrap;
}

.data-table td {
    white-space: nowrap;
}

.data-table td.positions-col {
    white-space: normal;
    min-width: 150px;
}