body {
            background:
                radial-gradient(circle at top right, rgba(246, 173, 85, 0.12), transparent 28%),
                radial-gradient(circle at left bottom, rgba(99, 179, 237, 0.14), transparent 34%),
                var(--bg);
        }
        .page-shell {
            position: relative;
            z-index: 1;
            padding: 0 16px 96px;
        }
        .hero {
            position: relative;
            overflow: hidden;
            margin: 12px 0 16px;
            padding: 22px;
            border-radius: 24px;
            border: 1px solid rgba(246, 173, 85, 0.16);
            background:
                radial-gradient(circle at top left, rgba(246, 173, 85, 0.18), transparent 34%),
                radial-gradient(circle at bottom right, rgba(99, 179, 237, 0.20), transparent 42%),
                linear-gradient(145deg, rgba(18, 17, 27, 0.98), rgba(12, 18, 29, 0.96));
            box-shadow: 0 24px 64px rgba(2, 8, 23, 0.34);
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: auto -90px -140px auto;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(246, 173, 85, 0.18), transparent 70%);
            pointer-events: none;
        }
        .hero-top {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 16px;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
        }
        .hero-kicker {
            margin-bottom: 10px;
            font-size: 11px;
            letter-spacing: 1.6px;
            text-transform: uppercase;
            font-family: 'JetBrains Mono', monospace;
            color: #F6AD55;
        }
        .hero-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.08;
            margin-bottom: 10px;
        }
        .hero-title .accent {
            color: #F6AD55;
        }
        .hero-copy {
            max-width: 760px;
            color: var(--muted);
            font-size: 13px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
            justify-content: flex-end;
            min-width: 220px;
        }
        .hero-note-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 12px;
            margin-top: 18px;
        }
        .hero-note {
            padding: 14px 16px;
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.04);
            box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
        }
        .hero-note-label {
            font-size: 10px;
            font-family: 'JetBrains Mono', monospace;
            letter-spacing: 0.9px;
            text-transform: uppercase;
            color: #F6AD55;
            margin-bottom: 7px;
        }
        .hero-note-value {
            font-size: 13px;
            color: var(--text);
            line-height: 1.5;
        }
        .panel-grid {
            display: grid;
            grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
            gap: 14px;
            margin-bottom: 14px;
        }
        .dual-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 14px;
            margin-bottom: 14px;
            align-items: start;
        }
        .panel {
            position: relative;
            overflow: hidden;
            border-radius: 22px;
            border: 1px solid rgba(255,255,255,0.08);
            background: linear-gradient(160deg, rgba(14, 20, 32, 0.96), rgba(9, 15, 24, 0.98));
            box-shadow: 0 20px 48px rgba(2, 8, 23, 0.22);
            padding: 18px;
        }
        .panel::after {
            content: '';
            position: absolute;
            inset: auto -60px -70px auto;
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255,255,255,0.08), transparent 72%);
            pointer-events: none;
        }
        .panel-header {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 10px;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .panel-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.2;
        }
        .panel-copy {
            margin-top: 6px;
            color: var(--muted);
            font-size: 12px;
            line-height: 1.65;
            max-width: 700px;
        }
        .panel-tools {
            display: flex;
            gap: 8px;
            align-items: center;
            flex-wrap: wrap;
        }
        .btn {
            border: 1px solid rgba(255,255,255,0.10);
            background: rgba(255,255,255,0.05);
            color: var(--text);
            border-radius: 12px;
            padding: 10px 14px;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, opacity 0.18s ease;
        }
        .btn:hover {
            transform: translateY(-1px);
            border-color: rgba(99, 179, 237, 0.35);
            background: rgba(99, 179, 237, 0.12);
        }
        .btn:disabled {
            opacity: 0.6;
            cursor: wait;
            transform: none;
        }
        .btn.primary {
            border-color: rgba(246, 173, 85, 0.34);
            background: linear-gradient(180deg, rgba(246, 173, 85, 0.18), rgba(255,255,255,0.05));
        }
        .btn.success {
            border-color: rgba(72, 187, 120, 0.34);
            background: linear-gradient(180deg, rgba(72, 187, 120, 0.16), rgba(255,255,255,0.04));
        }
        .btn.danger {
            border-color: rgba(252, 129, 129, 0.34);
            background: linear-gradient(180deg, rgba(252, 129, 129, 0.16), rgba(255,255,255,0.04));
        }
        .btn.ghost {
            background: transparent;
        }
        .pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 12px;
            border-radius: 999px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.04);
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .pill .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            box-shadow: 0 0 12px currentColor;
        }
        .pill-ok { color: var(--long); }
        .pill-running { color: #F6AD55; }
        .pill-failed { color: var(--short); }
        .pill-muted { color: var(--muted); }
        .mono {
            font-family: 'JetBrains Mono', monospace;
        }
        .form-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 12px;
        }
        .field {
            display: grid;
            gap: 6px;
        }
        .field.span-2 {
            grid-column: span 2;
        }
        .field label {
            font-size: 11px;
            color: var(--muted);
            font-family: 'JetBrains Mono', monospace;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }
        .field input,
        .field select,
        .field textarea {
            width: 100%;
            border-radius: 14px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.04);
            color: var(--text);
            padding: 12px 14px;
            outline: none;
            box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
        }
        .field textarea {
            min-height: 92px;
            resize: vertical;
            line-height: 1.55;
        }
        .field input:focus,
        .field select:focus,
        .field textarea:focus {
            border-color: rgba(246, 173, 85, 0.34);
            box-shadow: 0 0 0 3px rgba(246, 173, 85, 0.12);
        }
        .field small {
            color: var(--muted);
            font-size: 11px;
            line-height: 1.5;
        }
        .progress-shell {
            position: relative;
            z-index: 1;
            display: grid;
            gap: 12px;
        }
        .progress-rail {
            height: 10px;
            border-radius: 999px;
            background: rgba(255,255,255,0.06);
            overflow: hidden;
        }
        .progress-bar {
            height: 100%;
            border-radius: inherit;
            background: linear-gradient(90deg, rgba(246, 173, 85, 0.9), rgba(99, 179, 237, 0.95));
            box-shadow: 0 0 18px rgba(246, 173, 85, 0.26);
            width: 0%;
            transition: width 0.25s ease;
        }
        .status-meta {
            display: grid;
            gap: 8px;
            font-size: 12px;
            color: var(--muted);
        }
        .status-highlight {
            padding: 14px 16px;
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.04);
            color: var(--text);
            line-height: 1.65;
        }
        .metric-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 12px;
            margin-bottom: 16px;
        }
        .metric-card {
            padding: 14px;
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.04);
        }
        .metric-label {
            font-size: 10px;
            color: var(--muted);
            font-family: 'JetBrains Mono', monospace;
            letter-spacing: 0.7px;
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .metric-value {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.15;
        }
        .metric-value.positive { color: var(--long); }
        .metric-value.negative { color: var(--short); }
        .metric-subtext {
            margin-top: 6px;
            color: var(--muted);
            font-size: 11px;
            line-height: 1.5;
        }
        .chart-shell {
            position: relative;
            z-index: 1;
            padding: 14px;
            border-radius: 18px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.03);
            flex: 0 0 auto;
        }
        .chart-shell canvas {
            width: 100% !important;
            height: 280px !important;
        }
        .run-list {
            position: relative;
            z-index: 1;
            display: grid;
            flex: 1;
            gap: 10px;
            min-height: 0;
            max-height: var(--panel-scroll-max-height);
            overflow: auto;
            padding-right: 2px;
            overscroll-behavior: contain;
            scrollbar-gutter: stable both-edges;
        }
        .run-item {
            padding: 14px;
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.03);
            cursor: pointer;
            transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
        }
        .run-item:hover {
            transform: translateY(-1px);
            border-color: rgba(99, 179, 237, 0.26);
            background: rgba(99, 179, 237, 0.08);
        }
        .run-item.active {
            border-color: rgba(246, 173, 85, 0.32);
            background: linear-gradient(180deg, rgba(246, 173, 85, 0.12), rgba(255,255,255,0.03));
        }
        .run-item-top,
        .run-item-bottom {
            display: flex;
            justify-content: space-between;
            gap: 10px;
            align-items: flex-start;
            flex-wrap: wrap;
        }
        .run-item-title {
            font-size: 14px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 5px;
        }
        .run-item-copy {
            font-size: 11px;
            color: var(--muted);
            line-height: 1.55;
        }
        .run-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 10px;
        }
        .mini-chip {
            display: inline-flex;
            align-items: center;
            padding: 6px 9px;
            border-radius: 999px;
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.06);
            font-size: 10px;
            color: var(--muted);
            font-family: 'JetBrains Mono', monospace;
        }
        .detail-grid {
            position: relative;
            z-index: 1;
            display: grid;
            flex: 1;
            gap: 12px;
            min-height: 0;
            align-content: start;
        }
        .detail-card {
            padding: 14px;
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.03);
            min-width: 0;
        }
        .detail-list {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 12px;
        }
        .detail-item {
            display: grid;
            gap: 4px;
        }
        .detail-item-label {
            font-size: 10px;
            color: var(--muted);
            font-family: 'JetBrains Mono', monospace;
            letter-spacing: 0.6px;
            text-transform: uppercase;
        }
        .detail-item-value {
            color: var(--text);
            font-size: 12px;
            line-height: 1.6;
            word-break: break-word;
        }
        .table-wrap {
            position: relative;
            z-index: 1;
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,0.08);
            overflow: auto;
            background: rgba(255,255,255,0.03);
        }
        .table-preview-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 10px;
            padding: 10px 12px;
            border-radius: 14px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.03);
        }
        .table-preview-copy {
            color: var(--muted);
            font-size: 11px;
            line-height: 1.6;
            font-family: 'JetBrains Mono', monospace;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 11px;
            min-width: 720px;
        }
        .data-table th,
        .data-table td {
            padding: 11px 10px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            text-align: left;
            vertical-align: top;
        }
        .data-table th {
            color: var(--muted);
            font-size: 10px;
            font-family: 'JetBrains Mono', monospace;
            letter-spacing: 0.7px;
            text-transform: uppercase;
        }
        .data-table td {
            color: var(--text);
            line-height: 1.6;
        }
        .data-table tr:hover td {
            background: rgba(255,255,255,0.02);
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 8px;
            border-radius: 999px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.05);
            font-size: 10px;
            font-weight: 600;
        }
        .tag.long { color: var(--long); }
        .tag.short { color: var(--short); }
        .tag.signal { color: #F6AD55; }
        .empty-state {
            position: relative;
            z-index: 1;
            padding: 18px;
            border-radius: 16px;
            border: 1px dashed rgba(255,255,255,0.10);
            background: rgba(255,255,255,0.02);
            color: var(--muted);
            text-align: center;
            line-height: 1.7;
        }
        .split-stack {
            display: grid;
            gap: 12px;
        }
        .subhead {
            margin-bottom: 10px;
            font-size: 12px;
            color: var(--muted);
            font-family: 'JetBrains Mono', monospace;
            letter-spacing: 0.7px;
            text-transform: uppercase;
        }
        .note-box {
            padding: 14px;
            border-radius: 16px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.03);
            color: var(--muted);
            font-size: 12px;
            line-height: 1.7;
            white-space: pre-wrap;
            word-break: break-word;
            overflow-wrap: anywhere;
        }
        .quality-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 10px;
        }
        .quality-card {
            padding: 12px 14px;
            border-radius: 14px;
            border: 1px solid rgba(255,255,255,0.08);
            background: rgba(255,255,255,0.03);
        }
        .quality-card.good {
            border-color: rgba(72, 187, 120, 0.24);
            background: linear-gradient(180deg, rgba(72, 187, 120, 0.08), rgba(255,255,255,0.03));
        }
        .quality-card.warn {
            border-color: rgba(246, 173, 85, 0.24);
            background: linear-gradient(180deg, rgba(246, 173, 85, 0.08), rgba(255,255,255,0.03));
        }
        .quality-card.bad {
            border-color: rgba(252, 129, 129, 0.24);
            background: linear-gradient(180deg, rgba(252, 129, 129, 0.08), rgba(255,255,255,0.03));
        }
        .quality-title {
            font-size: 13px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .quality-copy {
            color: var(--muted);
            font-size: 11px;
            line-height: 1.6;
        }
        .replay-controls {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr 0.8fr auto;
            gap: 10px;
            margin-bottom: 14px;
            flex: 0 0 auto;
        }
        .backtest-scroll-region {
            flex: 1;
            min-height: 0;
            max-height: var(--panel-scroll-max-height);
            padding-right: 4px;
            overscroll-behavior: contain;
            scrollbar-gutter: stable both-edges;
        }
        @media (hover: hover) and (pointer: fine) {
            .run-list,
            .backtest-scroll-region {
                /* Let desktop trackpad scroll stay page-owned instead of being trapped inside the panel. */
                max-height: none;
                overflow: visible;
                overscroll-behavior: auto;
                scrollbar-gutter: auto;
                padding-right: 0;
            }
        }
        .foot-note {
            margin-top: 12px;
            color: var(--muted);
            font-size: 11px;
            line-height: 1.6;
        }
        @media (max-width: 1080px) {
            .panel-grid,
            .dual-grid {
                grid-template-columns: 1fr;
            }
            .run-list,
            .backtest-scroll-region {
                max-height: none;
                padding-right: 0;
                overflow: visible;
            }
        }
        @media (max-width: 768px) {
            .page-shell {
                padding: 0 12px 94px;
            }
            .hero {
                padding: 18px;
                border-radius: 20px;
            }
            .hero-title {
                font-size: 24px;
            }
            .form-grid,
            .detail-list,
            .replay-controls {
                grid-template-columns: 1fr;
            }
            .field.span-2 {
                grid-column: span 1;
            }
            .chart-shell canvas {
                height: 240px !important;
            }
        }