:root {
    color-scheme: light;
    --flow-primary: #1d4ed8;
    --flow-border: #d9e0ea;
    --flow-muted: #64748b;
    --flow-surface: #ffffff;
    --flow-background: #f4f7fb;
}

body {
    background: var(--flow-background);
}

.flow-page-shell {
    max-width: 1540px;
}

.flow-toolbar,
.flow-workspace {
    background: var(--flow-surface);
    border: 1px solid var(--flow-border);
    border-radius: 14px;
    box-shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
}

.flow-workspace-grid {
    display: grid;
    grid-template-columns: minmax(0, 2.2fr) minmax(280px, 1fr);
    gap: 1rem;
}

.flow-drop-zone {
    min-height: 180px;
    padding: 0.8rem;
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    background: #f8fafc;
    transition: border-color 0.15s ease, background-color 0.15s ease;
}

.flow-drop-zone.drag-over {
    border-color: var(--flow-primary);
    background: #eff6ff;
}

.flow-sequence {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.flow-machine-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 0.75rem;
    align-items: center;
    padding: 0.75rem;
    border: 1px solid var(--flow-border);
    border-radius: 10px;
    background: #fff;
    cursor: grab;
}

.flow-machine-card:active {
    cursor: grabbing;
}

.flow-machine-card.dragging {
    opacity: 0.45;
}

.flow-order-badge {
    display: inline-grid;
    place-items: center;
    width: 2rem;
    height: 2rem;
    border-radius: 999px;
    color: #fff;
    background: var(--flow-primary);
    font-weight: 700;
}

.flow-machine-name {
    font-weight: 700;
    color: #0f172a;
}

.flow-machine-key {
    color: var(--flow-muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.78rem;
    overflow-wrap: anywhere;
}

.flow-arrow {
    display: grid;
    place-items: center;
    color: #94a3b8;
    height: 0.8rem;
    font-size: 1.2rem;
}

.flow-empty {
    display: grid;
    place-items: center;
    min-height: 130px;
    color: var(--flow-muted);
    text-align: center;
}

.flow-version-badge {
    font-size: 0.85rem;
}

.flow-sync-warning {
    border-left: 4px solid #d97706;
}

.flow-edge-builder {
    display: grid;
    grid-template-columns: minmax(180px, 1fr) minmax(210px, 0.8fr) minmax(180px, 1fr) auto;
    gap: 0.75rem;
    align-items: end;
}

.flow-edge-list {
    display: grid;
    gap: 0.55rem;
}

.flow-edge-row {
    display: grid;
    grid-template-columns: 92px minmax(180px, 1fr) minmax(90px, auto) auto;
    gap: 0.75rem;
    align-items: center;
    padding: 0.7rem 0.8rem;
    border: 1px solid var(--flow-border);
    border-radius: 10px;
    background: #f8fafc;
}

.flow-edge-row.is-invalid {
    border-color: #fca5a5;
    background: #fef2f2;
}

.flow-edge-type {
    padding: 0.25rem 0.5rem;
    border-radius: 999px;
    color: #fff;
    font-size: 0.72rem;
    font-weight: 800;
    text-align: center;
}

.edge-branch { background: #2563eb; }
.edge-bypass { background: #7c3aed; }
.edge-rework { background: #d97706; }

.flow-edge-path { font-weight: 650; }
.flow-edge-valid { color: #15803d; font-size: 0.82rem; }
.flow-edge-error { color: #b91c1c; font-size: 0.82rem; }
.flow-edge-empty { color: var(--flow-muted); padding: 0.75rem; text-align: center; }

@media (max-width: 991.98px) {
    .flow-workspace-grid {
        grid-template-columns: 1fr;
    }

    .flow-edge-builder,
    .flow-edge-row {
        grid-template-columns: 1fr;
    }
}