:root {
    --flow-surface-canvas: #f3f6ff;
    --flow-surface-panel: #ffffff;
    --flow-radius-md: 0.75rem;
    --flow-radius-lg: 1rem;
    --flow-radius-xl: 1.125rem;
    --flow-surface-panel-muted: #f8fafc;
    --flow-surface-node: #ffffff;
    --flow-surface-node-hover: #f8faff;
    --flow-surface-rail: #eef2ff;

    --flow-border-soft: #dbe3f2;
    --flow-border-strong: #c2cce2;
    --flow-border-focus: #4f46e5;

    --flow-text-primary: #0f172a;
    --flow-text-secondary: #334155;
    --flow-text-muted: #64748b;

    --flow-brand: #4f46e5;
    --flow-brand-soft: #e0e7ff;
    --flow-brand-strong: #3730a3;

    --flow-connector-main: #94a3b8;
    --flow-connector-yes: #10b981;
    --flow-connector-no: #f43f5e;
    --flow-connector-insert: #2563eb;

    --flow-chip-bg: #eef2ff;
    --flow-chip-text: #3730a3;
    --flow-shadow-soft: 0 1px 2px 0 rgba(15, 23, 42, 0.08), 0 1px 3px 0 rgba(15, 23, 42, 0.1);
}

.dark {
    --flow-surface-canvas: #020617;
    --flow-surface-panel: #0b1222;
    --flow-surface-panel-muted: #111827;
    --flow-surface-node: #0f172a;
    --flow-surface-node-hover: #162036;
    --flow-surface-rail: #1e293b;

    --flow-border-soft: #334155;
    --flow-border-strong: #475569;
    --flow-border-focus: #818cf8;

    --flow-text-primary: #f8fafc;
    --flow-text-secondary: #dbe3f8;
    --flow-text-muted: #94a3b8;

    --flow-brand: #8b5cf6;
    --flow-brand-soft: rgba(139, 92, 246, 0.2);
    --flow-brand-strong: #c4b5fd;

    --flow-connector-main: #64748b;
    --flow-connector-yes: #34d399;
    --flow-connector-no: #fb7185;
    --flow-connector-insert: #60a5fa;

    --flow-chip-bg: #1e293b;
    --flow-chip-text: #c4b5fd;
    --flow-shadow-soft: 0 1px 2px 0 rgba(2, 6, 23, 0.4), 0 1px 3px 0 rgba(2, 6, 23, 0.5);
}

.flow-builder-grid {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 380px);
    align-items: start;
}

.flow-builder-canvas {
    position: relative;
    min-height: 860px;
    overflow: auto;
    overscroll-behavior: contain;
    padding: 2.5rem 2rem;
    border-radius: 1.5rem;
    border: 1px solid var(--flow-border-soft);
    background-color: var(--flow-surface-canvas);
    background-image: radial-gradient(rgba(148, 163, 184, 0.35) 1px, transparent 0);
    background-size: 20px 20px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.3);
}

.dark .flow-builder-canvas {
    background-image: radial-gradient(rgba(71, 85, 105, 0.5) 1px, transparent 0);
}

.flow-connector-line { width: 2px; background: transparent; border-radius: 999px; }
.flow-connector-overlay { position: absolute; inset: 0; pointer-events: none; z-index: 10; overflow: visible; }
.flow-anchor { position: relative; display: block; width: 2px; height: 2px; pointer-events: none; opacity: 0; }
.flow-anchor--node-input { margin-top: -1px; }
.flow-anchor--node-output { margin-top: -1px; }
.flow-anchor--split-junction,
.flow-anchor--branch-header-yes,
.flow-anchor--branch-header-no {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%);
}
.flow-connector-insert {
    border: 1px solid var(--flow-border-strong);
    background: var(--flow-surface-node);
    color: var(--flow-connector-insert);
    box-shadow: var(--flow-shadow-soft);
}

.flow-node-card {
    width: min(420px, 92vw);
    border: 1px solid var(--flow-border-soft);
    border-radius: var(--flow-radius-lg);
    background: var(--flow-surface-node);
    box-shadow: var(--flow-shadow-soft);
    display: flex;
    transition: border-color .16s ease, transform .16s ease, background .16s ease;
}
.flow-node-card:hover,
.flow-node-card:focus-visible { border-color: var(--flow-border-focus); background: var(--flow-surface-node-hover); transform: translateY(-1px); }

.flow-node-icon-rail {
    width: 56px;
    border-right: 1px solid var(--flow-border-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--flow-brand);
}
.flow-node-content { flex: 1; padding: .8rem .9rem; color: var(--flow-text-primary); }
.flow-node-type { font-size: .67rem; text-transform: uppercase; letter-spacing: .08em; color: var(--flow-brand); font-weight: 700; }
.flow-node-summary { font-size: .83rem; color: var(--flow-text-secondary); margin-top: .18rem; }
.flow-node-chip-row { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .6rem; }
.flow-chip { font-size: .64rem; font-weight: 700; border-radius: 999px; padding: .18rem .5rem; background: var(--flow-chip-bg); color: var(--flow-chip-text); border: 1px solid color-mix(in srgb, var(--flow-chip-text) 20%, transparent); }
.flow-node-actions { margin-top: .65rem; display: flex; gap: .4rem; opacity: 0; transition: opacity .12s ease; }
.flow-node-card:hover .flow-node-actions,
.flow-node-card:focus-within .flow-node-actions { opacity: 1; }
.flow-node-action { border: 1px solid var(--flow-border-soft); border-radius: var(--flow-radius-md); padding: .24rem .55rem; font-size: .68rem; color: var(--flow-text-secondary); }
.flow-node-action:focus-visible { outline: none; box-shadow: 0 0 0 2px color-mix(in srgb, var(--flow-border-focus) 35%, transparent); border-color: var(--flow-border-focus); }
.flow-node-action--primary { color: var(--flow-brand-strong); border-color: color-mix(in srgb, var(--flow-brand) 40%, var(--flow-border-soft)); }

.flow-split-rail { position: relative; width: min(840px, 96vw); padding-top: 1.5rem; }
.flow-split-junction-row {
    position: relative;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    justify-items: center;
    min-height: 1rem;
    margin-bottom: .5rem;
}
.flow-split-rail__bar {
    height: 2px;
    width: 100%;
    margin-inline: auto;
    background: linear-gradient(90deg, var(--flow-connector-yes), var(--flow-connector-no));
    border-radius: 999px;
}
.flow-branch-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: .65rem; }
.flow-branch-column { border: 1px solid var(--flow-border-soft); background: color-mix(in srgb, var(--flow-surface-node) 88%, transparent); border-radius: var(--flow-radius-lg); padding: .95rem .75rem .75rem; position: relative; }
.flow-branch-header {
    position: relative;
    min-height: 1.25rem;
    margin-bottom: .25rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}
.flow-branch-badge { font-size: .6rem; letter-spacing: .08em; text-transform: uppercase; font-weight: 800; border-radius: 999px; padding: .2rem .45rem; border: 1px solid; }
.flow-branch-badge--yes { color: #065f46; background: #d1fae5; border-color: #6ee7b7; }
.flow-branch-badge--no { color: #9f1239; background: #ffe4e6; border-color: #fda4af; }
.dark .flow-branch-badge--yes { color: #a7f3d0; background: rgba(6, 95, 70, 0.45); border-color: #34d399; }
.dark .flow-branch-badge--no { color: #fecdd3; background: rgba(136, 19, 55, 0.45); border-color: #fb7185; }

.flow-inspector { border: 1px solid var(--flow-border-soft); border-radius: 1.25rem; background: linear-gradient(180deg, var(--flow-surface-panel), var(--flow-surface-panel-muted)); padding: 1rem; }
.flow-inspector-panel { border: 1px solid var(--flow-border-soft); border-radius: .85rem; padding: .8rem; margin-top: .8rem; }
.flow-primary-action { width: 100%; border-radius: var(--flow-radius-md); padding: .52rem .75rem; font-size: .78rem; font-weight: 700; background: var(--flow-brand); color: white; }


@media (max-width: 760px) {
    .flow-split-rail { width: min(520px, 100%); }
    .flow-branch-grid { grid-template-columns: 1fr; gap: .85rem; }
    .flow-split-junction-row { grid-template-columns: 1fr; justify-items: start; padding-inline: 1rem; }
    .flow-split-rail__bar { display: none; }
    .flow-branch-header { justify-content: flex-start; }
    .flow-anchor--branch-header-yes,
    .flow-anchor--branch-header-no {
        left: 1rem;
        transform: translate(0, -50%);
    }
}

@media (max-width: 1100px) {
    .flow-builder-grid { grid-template-columns: 1fr; }
    .flow-inspector { order: 2; }
    .flow-builder-canvas { order: 1; min-height: 720px; }
}

.flow-inspector {
    border: 1px solid var(--flow-border-soft);
    border-radius: 1.25rem;
    background: linear-gradient(180deg, var(--flow-surface-panel), var(--flow-surface-panel-muted));
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: .85rem;
    max-height: 100%;
}

.flow-inspector-header { display: flex; align-items: flex-start; justify-content: space-between; gap: .75rem; }
.flow-inspector-title { font-size: .9rem; font-weight: 700; color: var(--flow-text-primary); }
.flow-inspector-helper { margin-top: .25rem; font-size: .74rem; color: var(--flow-text-muted); }
.flow-inspector-body { display: flex; flex-direction: column; gap: .75rem; overflow: auto; padding-right: .15rem; }
.flow-inspector-panel { border: 1px solid var(--flow-border-soft); border-radius: .9rem; padding: .85rem; background: color-mix(in srgb, var(--flow-surface-panel) 92%, transparent); }
.flow-inspector-empty-state { font-size: .75rem; }
.flow-inspector-card { display: flex; flex-direction: column; gap: .8rem; }
.flow-card-header { display: flex; flex-direction: column; gap: .3rem; }
.flow-card-kicker { font-size: .62rem; text-transform: uppercase; letter-spacing: .09em; color: var(--flow-text-muted); font-weight: 700; }
.flow-card-title { font-size: .82rem; font-weight: 700; color: var(--flow-text-primary); }
.flow-card-helper { font-size: .74rem; color: var(--flow-text-muted); }
.flow-card-copy { margin-top: .55rem; font-size: .75rem; color: var(--flow-text-secondary); }

.flow-inspector-status-row { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .65rem; }
.flow-status-chip { font-size: .64rem; font-weight: 700; border-radius: 999px; padding: .2rem .5rem; border: 1px solid var(--flow-border-soft); color: var(--flow-text-secondary); background: var(--flow-surface-panel); }
.flow-status-chip--type { color: var(--flow-brand-strong); border-color: color-mix(in srgb, var(--flow-brand) 35%, var(--flow-border-soft)); background: color-mix(in srgb, var(--flow-brand) 10%, var(--flow-surface-panel)); }
.flow-status-chip--success { color: var(--flow-connector-yes); border-color: color-mix(in srgb, var(--flow-connector-yes) 35%, var(--flow-border-soft)); background: color-mix(in srgb, var(--flow-connector-yes) 12%, var(--flow-surface-panel)); }
.flow-status-chip--warning { color: var(--flow-connector-no); border-color: color-mix(in srgb, var(--flow-connector-no) 35%, var(--flow-border-soft)); background: color-mix(in srgb, var(--flow-connector-no) 12%, var(--flow-surface-panel)); }
.flow-status-chip--branch { color: var(--flow-text-muted); }

.flow-form-stack { display: grid; gap: .68rem; }
.flow-form-grid { display: grid; gap: .68rem; grid-template-columns: repeat(2, minmax(0,1fr)); }
.flow-form-field { display: block; font-size: .75rem; font-weight: 600; color: var(--flow-text-secondary); }
.flow-input { width: 100%; margin-top: .35rem; border: 1px solid var(--flow-border-strong); border-radius: .65rem; padding: .5rem .6rem; font-size: .78rem; color: var(--flow-text-primary); background: var(--flow-surface-node); outline: none; }
.flow-input:focus { border-color: var(--flow-border-focus); box-shadow: 0 0 0 3px color-mix(in srgb, var(--flow-border-focus) 22%, transparent); }

.flow-logic-toggle { display: inline-flex; gap: .25rem; padding: .2rem; border-radius: .7rem; border: 1px solid var(--flow-border-soft); background: var(--flow-surface-panel-muted); }
.flow-toggle-button { border-radius: .55rem; padding: .4rem .65rem; font-size: .72rem; color: var(--flow-text-secondary); font-weight: 700; }
.flow-toggle-button--active { color: var(--flow-brand-strong); background: color-mix(in srgb, var(--flow-brand) 14%, var(--flow-surface-panel)); }
.flow-condition-group { display: grid; gap: .55rem; }
.flow-condition-row { border: 1px solid var(--flow-border-soft); border-radius: .8rem; padding: .55rem; display: grid; gap: .5rem; grid-template-columns: 1fr 1fr 1fr auto; align-items: end; }
.flow-condition-actions { display: flex; gap: .5rem; flex-wrap: wrap; }

.flow-primary-action { width: 100%; border-radius: var(--flow-radius-md); padding: .56rem .75rem; font-size: .78rem; font-weight: 700; background: var(--flow-brand); color: white; }
.flow-secondary-action { border: 1px solid var(--flow-border-strong); border-radius: var(--flow-radius-md); padding: .48rem .68rem; font-size: .72rem; font-weight: 700; color: var(--flow-text-secondary); background: var(--flow-surface-panel); }
.flow-primary-action:focus-visible,
.flow-secondary-action:focus-visible,
.flow-connector-insert:focus-visible,
.flow-port:focus-visible,
.flow-palette-item:focus-visible,
.flow-chooser-close:focus-visible { outline: none; box-shadow: 0 0 0 2px color-mix(in srgb, var(--flow-border-focus) 35%, transparent); border-color: var(--flow-border-focus); }

.flow-inspector-footer {
    margin-top: auto;
    position: sticky;
    bottom: 0;
    background: linear-gradient(180deg, color-mix(in srgb, var(--flow-surface-panel) 30%, transparent), var(--flow-surface-panel));
    border-top: 1px solid var(--flow-border-soft);
    padding-top: .75rem;
    display: grid;
    gap: .5rem;
}

.flow-chooser-backdrop {
    background: radial-gradient(circle at top, rgba(79, 70, 229, 0.2), rgba(2, 6, 23, 0.7));
    backdrop-filter: blur(6px);
}

.flow-chooser-panel {
    border: 1px solid color-mix(in srgb, var(--flow-border-soft) 80%, white);
    border-radius: 1.5rem;
    background: linear-gradient(165deg, color-mix(in srgb, var(--flow-surface-panel) 95%, white), var(--flow-surface-panel-muted));
    padding: 1.2rem;
    box-shadow: 0 30px 60px -36px rgba(15, 23, 42, 0.85);
}

.flow-chooser-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.flow-chooser-close {
    border: 1px solid var(--flow-border-soft);
    border-radius: var(--flow-radius-md);
    height: 2rem;
    width: 2rem;
    color: var(--flow-text-muted);
    background: var(--flow-surface-panel);
}

.flow-chooser-grid {
    display: grid;
    gap: .75rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.flow-chooser-card {
    border: 1px solid var(--flow-border-soft);
    border-radius: 1rem;
    padding: .85rem;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: start;
    gap: .7rem;
    text-align: left;
    background: color-mix(in srgb, var(--flow-surface-panel) 90%, transparent);
    transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}

.flow-chooser-card:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--flow-brand) 45%, var(--flow-border-soft));
    box-shadow: 0 18px 30px -26px rgba(79, 70, 229, 0.8);
}

.flow-chooser-icon {
    height: 2rem;
    width: 2rem;
    border-radius: .7rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: color-mix(in srgb, var(--flow-brand) 14%, var(--flow-surface-panel));
    font-size: 1rem;
}

.flow-chooser-copy {
    min-width: 0;
}

.flow-chooser-pill {
    font-size: .63rem;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--flow-brand) 30%, var(--flow-border-soft));
    color: var(--flow-brand-strong);
    padding: .18rem .45rem;
    background: color-mix(in srgb, var(--flow-brand) 10%, var(--flow-surface-panel));
    font-weight: 700;
}

@media (max-width: 900px) {
    .flow-condition-row { grid-template-columns: 1fr; }
    .flow-form-grid { grid-template-columns: 1fr; }
    .flow-chooser-grid { grid-template-columns: 1fr; }
}

.flow-builder-canvas-shell { border: 1px solid var(--flow-border-soft); border-radius: var(--flow-radius-xl); background: var(--flow-surface-panel); overflow: hidden; box-shadow: var(--flow-shadow-soft); }
.flow-toolbar { display: flex; justify-content: space-between; align-items: center; gap: .75rem; padding: .75rem; border-bottom: 1px solid var(--flow-border-soft); }
.flow-node-palette { display: flex; gap: .5rem; flex-wrap: wrap; }
.flow-palette-item { display: inline-flex; align-items: center; gap: .35rem; padding: .35rem .65rem; border-radius: var(--flow-radius-md); border: 1px solid var(--flow-border-soft); background: var(--flow-surface-node); font-size: .75rem; font-weight: 600; color: var(--flow-text-secondary); }
.flow-toolbar-actions { display: flex; gap: .45rem; }
.flow-viewport { position: absolute; inset: 0; transform-origin: 0 0; }
.flow-graph-node { position: absolute; width: 220px; min-height: 120px; border-radius: var(--flow-radius-lg); border: 1px solid var(--flow-border-soft); background: var(--flow-surface-node); box-shadow: var(--flow-shadow-soft); padding: .75rem; user-select: none; }
.flow-graph-node--selected { border-color: var(--flow-border-focus); }
.flow-port-row { margin-top: .7rem; display: flex; justify-content: space-between; align-items: center; }
.flow-port { width: 14px; height: 14px; border-radius: 999px; border: 1px solid var(--flow-border-strong); background: var(--flow-surface-panel); transition: border-color .15s ease, box-shadow .15s ease; }
.flow-port--in { position: absolute; top: -7px; left: calc(50% - 7px); }
.flow-port--yes { border-color: var(--flow-connector-yes); }
.flow-port--no { border-color: var(--flow-connector-no); }