/* ========================================
   BACKTEST ENGINE — Institutional Dark UI
   ======================================== */

/* ---- Page Entry Transition ---- */
.bt-page-wrapper {
    animation: bt-pageEnter 0.5s ease both;
}

@keyframes bt-pageEnter {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---- Minimal Header ---- */
.bt-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 52px;
    background: var(--color-bg, #0a0e17);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    position: sticky;
    top: 0;
    z-index: 100;
}

.bt-header-left {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: 1;
}

.bt-header-logo {
    gap: 8px;
}

.bt-header-logo span {
    font-size: 0.92rem;
}

.bt-header-divider {
    width: 1px;
    height: 20px;
    background: rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.bt-header-back {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.78rem;
    font-weight: 500;
    color: #64748b;
    text-decoration: none;
    transition: color 0.2s;
    white-space: nowrap;
}

.bt-header-back:hover {
    color: #94a3b8;
}

.bt-header-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.bt-header-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: #e2e8f0;
    margin: 0;
    letter-spacing: -0.01em;
    white-space: nowrap;
}

.bt-header-right {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

/* ---- Layout ---- */
.bt-engine {
    min-height: calc(100vh - 52px);
    background: var(--color-bg, #0a0e17);
    color: var(--color-text-primary, #e2e8f0);
    font-family: 'Inter', system-ui, sans-serif;
}

/* ---- Status Bar ---- */
.bt-status-bar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 6px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}


.bt-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: #94a3b8;
    padding: 4px 12px;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.bt-status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #22c55e;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
    animation: bt-pulse 2s ease-in-out infinite;
}

@keyframes bt-pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.4;
    }
}

/* ---- Loading Overlay ---- */
.bt-loading-overlay {
    position: absolute;
    inset: 0;
    z-index: 20;
    background: rgba(10, 14, 23, 0.92);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s ease;
}

.bt-loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.bt-loading-content {
    text-align: center;
    max-width: 280px;
}

.bt-loading-spinner {
    margin-bottom: 16px;
}

.bt-loading-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: #e2e8f0;
    margin-bottom: 18px;
    letter-spacing: -0.01em;
}

.bt-loading-steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: left;
}

.bt-loading-step {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.76rem;
    font-family: 'JetBrains Mono', monospace;
    color: #475569;
    opacity: 0;
    transform: translateY(6px);
    animation: bt-stepFadeIn 0.3s ease forwards;
}

.bt-loading-step.complete {
    color: #94a3b8;
}

.bt-loading-step .step-icon {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bt-loading-step .step-check {
    color: #22c55e;
    font-size: 0.7rem;
}

.bt-loading-step .step-spinner {
    animation: bt-spin 1s linear infinite;
    color: #6366f1;
}

@keyframes bt-stepFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---- Metric Animation ---- */
.bt-metric-value.counting {
    transition: color 0.3s;
}

.bt-trade-table-wrap.fade-in {
    animation: bt-fadeUp 0.5s ease both;
}

@keyframes bt-fadeUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.bt-btn-icon {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
    color: #94a3b8;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.bt-btn-icon:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #e2e8f0;
    border-color: rgba(255, 255, 255, 0.12);
}

/* ---- Three-Column Layout ---- */
.bt-layout {
    display: grid;
    grid-template-columns: 320px 1fr 320px;
    min-height: calc(100vh - 160px);
    gap: 0;
}

.bt-panel {
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.bt-panel:last-child {
    border-right: none;
    border-left: 1px solid rgba(255, 255, 255, 0.06);
}

.bt-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(255, 255, 255, 0.02);
    flex-shrink: 0;
}

.bt-panel-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #94a3b8;
    margin: 0;
}

.bt-panel-collapse {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: #64748b;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.bt-panel-collapse:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #94a3b8;
}

.bt-panel-body {
    padding: 16px 18px;
    overflow-y: auto;
    flex: 1;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.08) transparent;
}

.bt-panel-body::-webkit-scrollbar {
    width: 5px;
}

.bt-panel-body::-webkit-scrollbar-track {
    background: transparent;
}

.bt-panel-body::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

/* ---- Form Elements ---- */
.bt-field-group {
    margin-bottom: 12px;
}

.bt-label {
    display: block;
    font-size: 0.7rem;
    font-weight: 500;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 5px;
}

.bt-input,
.bt-select {
    width: 100%;
    padding: 8px 12px;
    font-size: 0.82rem;
    font-family: 'Inter', sans-serif;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    color: #e2e8f0;
    outline: none;
    transition: all 0.2s;
    box-sizing: border-box;
}

.bt-input:focus,
.bt-select:focus {
    border-color: rgba(99, 102, 241, 0.5);
    background: rgba(99, 102, 241, 0.06);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.bt-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 28px;
    cursor: pointer;
}

.bt-select option {
    background: #131827;
    color: #e2e8f0;
}

.bt-input-prefix,
.bt-input-suffix {
    position: relative;
    display: flex;
    align-items: center;
}

.bt-prefix {
    position: absolute;
    left: 12px;
    font-size: 0.82rem;
    color: #64748b;
    pointer-events: none;
    z-index: 1;
}

.bt-input-prefix .bt-input {
    padding-left: 28px;
}

.bt-suffix {
    position: absolute;
    right: 12px;
    font-size: 0.72rem;
    color: #64748b;
    pointer-events: none;
    font-weight: 500;
}

.bt-input-suffix .bt-input {
    padding-right: 30px;
}

.bt-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.bt-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px;
}

.bt-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.06);
    margin: 16px 0;
}

.bt-section-label {
    font-size: 0.68rem;
    font-weight: 600;
    color: #64748b;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
}

.bt-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

/* ---- Buttons ---- */
.bt-btn-sm {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: 0.7rem;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    color: #818cf8;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.bt-btn-sm:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.35);
}

.bt-btn-run {
    width: 100%;
    padding: 12px 20px;
    margin-top: 16px;
    font-size: 0.88rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    color: #fff;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.25);
    position: relative;
    overflow: hidden;
}

.bt-btn-run::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255, 255, 255, 0.1) 50%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s;
}

.bt-btn-run:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 28px rgba(99, 102, 241, 0.35);
}

.bt-btn-run:hover::before {
    opacity: 1;
}

.bt-btn-run:active {
    transform: translateY(0);
}

.bt-btn-run.running {
    pointer-events: none;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    animation: bt-shimmer 2s linear infinite;
}

@keyframes bt-shimmer {
    0% {
        background-position: -200% center;
    }

    100% {
        background-position: 200% center;
    }
}

/* ---- Indicator Cards ---- */
.bt-indicator-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.bt-indicator-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    padding: 10px 12px;
    transition: all 0.2s;
}

.bt-indicator-card:hover {
    border-color: rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
}

.bt-indicator-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.bt-indicator-badge {
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    padding: 2px 7px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', monospace;
}

.bt-indicator-badge.sma {
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.25);
}

.bt-indicator-badge.rsi {
    background: rgba(168, 85, 247, 0.15);
    color: #c084fc;
    border: 1px solid rgba(168, 85, 247, 0.25);
}

.bt-indicator-badge.macd {
    background: rgba(34, 197, 94, 0.15);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.25);
}

/* Production Badge */
.bt-production-badge {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 6px;
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
    border: 1px solid rgba(99, 102, 241, 0.3);
    letter-spacing: 0.04em;
    display: inline-flex;
    align-items: center;
    margin-left: 10px;
    text-transform: uppercase;
}

/* Production Notes List */
.bt-production-notes ul li {
    margin-bottom: 6px;
    position: relative;
}

.bt-production-notes ul li::before {
    content: '•';
    color: #818cf8;
    position: absolute;
    left: -14px;
    font-weight: bold;
}

.bt-indicator-name {
    font-size: 0.75rem;
    color: #cbd5e1;
    flex: 1;
}

.bt-indicator-remove {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: none;
    background: transparent;
    color: #475569;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.bt-indicator-remove:hover {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.bt-indicator-params {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.bt-mini-field {
    flex: 1;
    min-width: 60px;
}

.bt-mini-field label {
    display: block;
    font-size: 0.6rem;
    color: #475569;
    margin-bottom: 3px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.bt-input-mini,
.bt-select-mini {
    width: 100%;
    padding: 4px 8px;
    font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 5px;
    color: #e2e8f0;
    outline: none;
    transition: border-color 0.2s;
    box-sizing: border-box;
}

.bt-input-mini:focus,
.bt-select-mini:focus {
    border-color: rgba(99, 102, 241, 0.4);
}

.bt-select-mini {
    appearance: none;
    cursor: pointer;
}

/* ---- Condition Builder ---- */
.bt-condition-block {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    padding: 10px 12px;
    margin-bottom: 12px;
}

.bt-condition-row {
    display: flex;
    gap: 6px;
    align-items: center;
}

.bt-select-sm,
.bt-input-sm {
    padding: 5px 8px;
    font-size: 0.72rem;
    font-family: 'Inter', sans-serif;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    color: #e2e8f0;
    outline: none;
    transition: border-color 0.2s;
    box-sizing: border-box;
}

.bt-select-sm {
    appearance: none;
    cursor: pointer;
    flex: 1;
}

.bt-select-op {
    flex: 1.2;
}

.bt-input-sm {
    width: 60px;
    flex-shrink: 0;
    font-family: 'JetBrains Mono', monospace;
}

.bt-select-sm:focus,
.bt-input-sm:focus {
    border-color: rgba(99, 102, 241, 0.4);
}

.bt-condition-logic {
    font-size: 0.62rem;
    font-weight: 700;
    color: #818cf8;
    text-align: center;
    padding: 4px 0;
    letter-spacing: 0.12em;
}

/* ---- Center Panel / Chart ---- */
.bt-panel-center {
    border-right: none;
    border-left: none;
}

.bt-panel-center .bt-panel-header {
    padding: 10px 20px;
}

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

.bt-chart-price {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.95rem;
    font-weight: 500;
    color: #e2e8f0;
}

.bt-chart-change {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 4px;
}

.bt-chart-change.positive {
    color: #4ade80;
    background: rgba(34, 197, 94, 0.1);
}

.bt-chart-change.negative {
    color: #f87171;
    background: rgba(239, 68, 68, 0.1);
}

.bt-chart-toggles {
    display: flex;
    gap: 4px;
}

.bt-toggle {
    padding: 5px 12px;
    font-size: 0.7rem;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    color: #64748b;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.bt-toggle:hover {
    color: #94a3b8;
    background: rgba(255, 255, 255, 0.04);
}

.bt-toggle.active {
    color: #818cf8;
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.25);
}

.bt-chart-container {
    position: relative;
    flex: 1;
    min-height: 440px;
    background: rgba(0, 0, 0, 0.15);
    overflow: hidden;
}

.bt-chart-container canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.bt-chart-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.bt-indicator-overlay,
.bt-trade-markers {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.bt-volume-chart {
    height: 80px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(0, 0, 0, 0.1);
    position: relative;
}

.bt-volume-chart canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* ---- Right Panel / Metrics ---- */
.bt-metrics-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.bt-metric {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 10px 12px;
    transition: all 0.2s;
}

.bt-metric:hover {
    border-color: rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
}

.bt-metric-wide {
    grid-column: 1 / -1;
}

.bt-metric-label {
    font-size: 0.62rem;
    font-weight: 500;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 4px;
}

.bt-metric-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.05rem;
    font-weight: 600;
    color: #e2e8f0;
}

.bt-metric-value.positive {
    color: #4ade80;
}

.bt-metric-value.negative {
    color: #f87171;
}

/* ---- Stat Rows ---- */
.bt-stat-rows {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.bt-stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

.bt-stat-key {
    font-size: 0.72rem;
    color: #64748b;
}

.bt-stat-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    color: #cbd5e1;
    font-weight: 500;
}

/* ---- Trade Table ---- */
.bt-trade-table-wrap {
    overflow-x: auto;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.bt-trade-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.7rem;
}

.bt-trade-table th {
    padding: 7px 8px;
    text-align: left;
    font-size: 0.6rem;
    font-weight: 600;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    white-space: nowrap;
}

.bt-trade-table td {
    padding: 6px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    color: #94a3b8;
    white-space: nowrap;
}

.bt-trade-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.bt-trade-table td.positive {
    color: #4ade80;
}

.bt-trade-table td.negative {
    color: #f87171;
}

.bt-side {
    font-size: 0.58rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    padding: 2px 6px;
    border-radius: 3px;
}

.bt-side.long {
    background: rgba(34, 197, 94, 0.12);
    color: #4ade80;
}

.bt-side.short {
    background: rgba(239, 68, 68, 0.12);
    color: #f87171;
}

/* ---- Below Fold ---- */
.bt-below-fold {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 0 24px 40px;
}

.bt-below-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.bt-below-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.bt-below-tabs {
    display: flex;
    gap: 4px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    padding: 3px;
}

.bt-tab {
    padding: 7px 16px;
    font-size: 0.75rem;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    color: #64748b;
    background: transparent;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    transition: all 0.2s;
}

.bt-tab:hover {
    color: #94a3b8;
}

.bt-tab.active {
    color: #e2e8f0;
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

.bt-analytics-panel {
    display: none;
    animation: bt-fadeIn 0.3s ease;
}

.bt-analytics-panel.active {
    display: block;
}

@keyframes bt-fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.bt-full-chart {
    height: 320px;
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.bt-full-chart canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* ---- Heatmap ---- */
.bt-heatmap-container {
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.bt-heatmap {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.72rem;
    font-family: 'JetBrains Mono', monospace;
}

.bt-heatmap th {
    padding: 10px 12px;
    text-align: center;
    font-size: 0.62rem;
    font-weight: 600;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.bt-heatmap td {
    padding: 8px 10px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.03);
    font-weight: 500;
    color: #e2e8f0;
    min-width: 56px;
    transition: transform 0.15s;
}

.bt-heatmap td:hover {
    transform: scale(1.05);
    z-index: 1;
    position: relative;
}

.bt-heatmap td.year-label {
    font-weight: 600;
    color: #94a3b8;
    background: rgba(255, 255, 255, 0.02);
    text-align: left;
    padding-left: 14px;
}

.bt-heatmap td.year-total {
    font-weight: 700;
    border-left: 2px solid rgba(255, 255, 255, 0.08);
}

/* Heatmap color classes */
.bt-hm-strong-pos {
    background: rgba(34, 197, 94, 0.35);
    color: #4ade80;
}

.bt-hm-pos {
    background: rgba(34, 197, 94, 0.18);
    color: #4ade80;
}

.bt-hm-slight-pos {
    background: rgba(34, 197, 94, 0.08);
    color: #86efac;
}

.bt-hm-neutral {
    background: rgba(255, 255, 255, 0.02);
    color: #64748b;
}

.bt-hm-slight-neg {
    background: rgba(239, 68, 68, 0.08);
    color: #fca5a5;
}

.bt-hm-neg {
    background: rgba(239, 68, 68, 0.18);
    color: #f87171;
}

.bt-hm-strong-neg {
    background: rgba(239, 68, 68, 0.35);
    color: #f87171;
}

/* ---- Responsive ---- */
@media (max-width: 1200px) {
    .bt-layout {
        grid-template-columns: 280px 1fr 280px;
    }
}

@media (max-width: 1024px) {
    .bt-layout {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .bt-panel {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .bt-panel:last-child {
        border-left: none;
    }

    .bt-panel-left .bt-panel-body {
        max-height: none;
    }

    .bt-chart-container {
        min-height: 360px;
    }

    .bt-chart-header-left,
    .bt-chart-toggles {
        flex-wrap: wrap;
    }

    .bt-below-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .bt-below-tabs {
        overflow-x: auto;
        width: 100%;
    }
}

@media (max-width: 640px) {
    .bt-header {
        padding: 0 14px;
        height: 48px;
    }

    .bt-header-center {
        display: none;
    }

    .bt-header-logo span {
        display: none;
    }

    .bt-btn-ai-strategy span,
    .bt-btn-ai-strategy {
        font-size: 0.7rem;
        padding: 5px 10px;
    }

    .bt-below-fold {
        padding: 0 16px 24px;
    }

    .bt-row-2,
    .bt-row-3 {
        grid-template-columns: 1fr;
    }

    .bt-metrics-grid {
        grid-template-columns: 1fr;
    }

    .bt-condition-row {
        flex-wrap: wrap;
    }

    .bt-full-chart {
        height: 240px;
    }
}

/* ---- Utility ---- */
.positive {
    color: #4ade80 !important;
}

.negative {
    color: #f87171 !important;
}

/* Number input spinner hide */
.bt-input[type=number]::-webkit-inner-spin-button,
.bt-input[type=number]::-webkit-outer-spin-button,
.bt-input-mini[type=number]::-webkit-inner-spin-button,
.bt-input-mini[type=number]::-webkit-outer-spin-button,
.bt-input-sm[type=number]::-webkit-inner-spin-button,
.bt-input-sm[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.bt-input[type=number],
.bt-input-mini[type=number],
.bt-input-sm[type=number] {
    -moz-appearance: textfield;
}

/* Date input styling */
.bt-input[type=date] {
    color-scheme: dark;
}

.bt-input[type=date]::-webkit-calendar-picker-indicator {
    filter: invert(0.5);
    cursor: pointer;
}

/* ========================================
   AI STRATEGY CREATION - Button & Modal
   ======================================== */

/* Topbar Button */
.bt-btn-ai-strategy {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    color: #c4b5fd;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.22);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.25s;
    white-space: nowrap;
}

.bt-btn-ai-strategy:hover {
    background: rgba(99, 102, 241, 0.18);
    border-color: rgba(99, 102, 241, 0.4);
    color: #e0ddff;
    box-shadow: 0 2px 12px rgba(99, 102, 241, 0.15);
}

/* Modal Overlay */
.bt-modal-overlay {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100vh !important;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.bt-modal-overlay.open {
    opacity: 1;
    visibility: visible;
}

/* Modal */
.bt-modal {
    width: 90%;
    max-width: 640px;
    max-height: 90vh;
    background: #111827;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.04);
    transform: translateY(20px) scale(0.97);
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    margin: auto;
    /* Ensure centering works in various flex environments */
}

.bt-modal-overlay.open .bt-modal {
    transform: translateY(0) scale(1);
}

.bt-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    flex-shrink: 0;
}

.bt-modal-title-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.bt-modal-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #818cf8;
}

.bt-modal-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: #e2e8f0;
    margin: 0;
}

.bt-modal-close {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: none;
    background: rgba(255, 255, 255, 0.04);
    color: #64748b;
    font-size: 1.3rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    line-height: 1;
}

.bt-modal-close:hover {
    background: rgba(239, 68, 68, 0.12);
    color: #f87171;
}

.bt-modal-body {
    padding: 20px 24px 24px;
    overflow-y: auto;
    flex: 1;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.08) transparent;
}

/* Textarea */
.bt-textarea {
    width: 100%;
    padding: 12px 14px;
    font-size: 0.82rem;
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    color: #e2e8f0;
    outline: none;
    resize: vertical;
    transition: all 0.2s;
    box-sizing: border-box;
}

.bt-textarea:focus {
    border-color: rgba(99, 102, 241, 0.5);
    background: rgba(99, 102, 241, 0.04);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.08);
}

.bt-textarea::placeholder {
    color: #475569;
}

.bt-textarea-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    line-height: 1.5;
    tab-size: 2;
}

/* Advanced Mode Toggle */
.bt-advanced-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 14px 0;
}

.bt-toggle-switch {
    position: relative;
    width: 36px;
    height: 20px;
    cursor: pointer;
    flex-shrink: 0;
}

.bt-toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.bt-toggle-slider {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    transition: background 0.25s;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.bt-toggle-slider::before {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    left: 2px;
    bottom: 2px;
    background: #64748b;
    border-radius: 50%;
    transition: all 0.25s;
}

.bt-toggle-switch input:checked+.bt-toggle-slider {
    background: rgba(99, 102, 241, 0.3);
    border-color: rgba(99, 102, 241, 0.4);
}

.bt-toggle-switch input:checked+.bt-toggle-slider::before {
    transform: translateX(16px);
    background: #818cf8;
}

.bt-advanced-label {
    font-size: 0.78rem;
    font-weight: 500;
    color: #cbd5e1;
}

.bt-advanced-hint {
    font-size: 0.68rem;
    color: #475569;
    margin-left: auto;
}

.bt-advanced-area {
    margin-bottom: 14px;
    animation: bt-fadeIn 0.25s ease;
}

/* Config Grid */
.bt-modal-config {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 16px;
}

@media (max-width: 640px) {
    .bt-modal-config {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .bt-modal-config {
        grid-template-columns: 1fr;
    }
}

/* Generate Button */
.bt-btn-generate {
    width: 100%;
    padding: 13px 20px;
    font-size: 0.88rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    color: #fff;
    background: linear-gradient(135deg, #6366f1 0%, #7c3aed 100%);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s;
    box-shadow: 0 4px 18px rgba(99, 102, 241, 0.2);
    position: relative;
    overflow: hidden;
}

.bt-btn-generate:hover {
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.35);
    transform: translateY(-1px);
}

.bt-btn-generate:active {
    transform: translateY(0);
}

.bt-btn-generate.loading {
    pointer-events: none;
    opacity: 0.85;
}

.bt-btn-generate.loading svg {
    animation: bt-spin 1s linear infinite;
}

/* AI Result Preview */
.bt-ai-result {
    margin-top: 18px;
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 12px;
    overflow: hidden;
    background: rgba(99, 102, 241, 0.04);
    animation: bt-fadeIn 0.4s ease;
}

.bt-ai-result-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.12);
    background: rgba(99, 102, 241, 0.06);
}

.bt-ai-result-badge {
    font-size: 0.58rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 3px 8px;
    border-radius: 4px;
    background: rgba(99, 102, 241, 0.2);
    color: #a5b4fc;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.bt-ai-result-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: #c4b5fd;
}

.bt-ai-result-code {
    padding: 14px 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    line-height: 1.65;
    color: #cbd5e1;
    overflow-x: auto;
    margin: 0;
    white-space: pre-wrap;
    max-height: 260px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.08) transparent;
}

/* Apply Button */
.bt-btn-apply {
    width: 100%;
    padding: 11px 16px;
    font-size: 0.82rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    color: #4ade80;
    background: rgba(34, 197, 94, 0.08);
    border: none;
    border-top: 1px solid rgba(34, 197, 94, 0.12);
    cursor: pointer;
    transition: all 0.2s;
}

.bt-btn-apply:hover {
    background: rgba(34, 197, 94, 0.15);
    color: #86efac;
}

/* ---- Quant Explanation Panel ---- */
.bt-quant-explanation {
    max-height: 480px;
    overflow-y: auto;
    padding: 14px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(99, 102, 241, 0.12);
    border-radius: 10px;
    font-size: 0.74rem;
    line-height: 1.65;
    color: #94a3b8;
    scrollbar-width: thin;
    scrollbar-color: rgba(99, 102, 241, 0.25) transparent;
}

.bt-quant-explanation::-webkit-scrollbar {
    width: 5px;
}

.bt-quant-explanation::-webkit-scrollbar-track {
    background: transparent;
}

.bt-quant-explanation::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.25);
    border-radius: 4px;
}

.bt-quant-explanation .qe-section {
    margin-bottom: 14px;
}

.bt-quant-explanation .qe-section:last-child {
    margin-bottom: 0;
}

.bt-quant-explanation .qe-heading {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #818cf8;
    margin-bottom: 6px;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
}

.bt-quant-explanation .qe-verdict {
    font-size: 0.82rem;
    font-weight: 600;
    color: #e2e8f0;
    margin-bottom: 4px;
}

.bt-quant-explanation ul {
    margin: 0;
    padding-left: 16px;
}

.bt-quant-explanation ul li {
    margin-bottom: 3px;
}

.bt-quant-explanation .qe-val {
    color: #c7d2fe;
    font-weight: 600;
}

.bt-quant-explanation .qe-positive {
    color: #4ade80;
}

.bt-quant-explanation .qe-negative {
    color: #f87171;
}

.bt-quant-explanation .qe-neutral {
    color: #fbbf24;
}

/* ---- Explain Results Button ---- */
#btn-explain-results {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 100%;
    padding: 10px 16px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    color: #818cf8;
    background: rgba(99, 102, 241, 0.08);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
}

#btn-explain-results:hover {
    background: rgba(99, 102, 241, 0.18);
    color: #a5b4fc;
    border-color: rgba(99, 102, 241, 0.5);
}

.qe-disclosure {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid rgba(226, 232, 240, 0.08);
    font-size: 0.65rem;
    color: #94a3b8;
    opacity: 0.75;
    line-height: 1.5;
    text-align: center;
}

/* ---- A/B Compare Runs ---- */
#compare-modal .bt-trades-table th,
#compare-modal .bt-trades-table td {
    padding: 10px 14px;
    border-bottom: 1px solid rgba(226, 232, 240, 0.05);
    white-space: nowrap;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

#compare-modal .bt-trades-table th {
    font-weight: 600;
    color: #94a3b8;
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    background: rgba(15, 23, 42, 0.8);
}

#compare-modal .bt-trades-table td {
    font-size: 0.8rem;
    color: #e2e8f0;
}

#compare-modal .bt-trades-table td.positive-delta {
    color: #4ade80;
    font-weight: 600;
}

#compare-modal .bt-trades-table td.negative-delta {
    color: #f87171;
    font-weight: 600;
}

#compare-modal .bt-trades-table td.neutral-delta {
    color: #94a3b8;
}

.compare-diff-card {
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid rgba(226, 232, 240, 0.08);
    border-radius: 8px;
    padding: 16px;
    text-align: center;
}

.compare-diff-label {
    font-size: 0.7rem;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.compare-diff-value {
    font-size: 1.1rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

/* ---- Strategy Versions / Journal ---- */
.bt-version-card {
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid rgba(226, 232, 240, 0.08);
    border-radius: 8px;
    padding: 12px;
    transition: all 0.2s ease;
}

.bt-version-card:hover {
    background: rgba(30, 41, 59, 0.7);
    border-color: rgba(168, 85, 247, 0.3);
}

.bt-version-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
}

.bt-version-title {
    font-size: 0.9rem;
    color: #e2e8f0;
    font-weight: 500;
    margin: 0;
}

.bt-version-time {
    font-size: 0.65rem;
    color: #64748b;
}

.bt-version-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 8px;
}

.bt-version-tag {
    font-size: 0.6rem;
    padding: 2px 6px;
    background: rgba(168, 85, 247, 0.1);
    color: #c084fc;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.bt-version-metrics {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: #94a3b8;
    margin-bottom: 10px;
    background: rgba(15, 23, 42, 0.5);
    padding: 6px 8px;
    border-radius: 4px;
}

.bt-version-metric {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.bt-version-metric-val {
    color: #e2e8f0;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.bt-version-notes {
    font-size: 0.75rem;
    color: #94a3b8;
    margin-bottom: 10px;
    font-style: italic;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.bt-version-actions {
    display: flex;
    justify-content: flex-end;
    gap: 6px;
    border-top: 1px solid rgba(226, 232, 240, 0.05);
    padding-top: 8px;
}