:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-2: #f1f3f8;
  --border: #e2e5ee;
  --text: #1c2033;
  --muted: #6b7189;
  --accent: #4f46e5;
  --accent-soft: #eef0ff;
  --ok: #15803d;
  --ok-soft: #e7f6ec;
  --err: #c2410c;
  --err-soft: #fdeee6;
  --warn: #a16207;
  --warn-soft: #fdf6e3;
  --grid: #e6e8f0;
  --edge: #8f96b2;
  --shadow: 0 1px 2px rgba(20, 24, 50, .06), 0 4px 14px rgba(20, 24, 50, .06);
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --c-webhook: #7c3aed;
  --c-if: #d97706;
  --c-http: #2563eb;
  --c-set: #0d9488;
  --c-respond: #16a34a;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12141c;
    --surface: #1a1d28;
    --surface-2: #222634;
    --border: #2e3344;
    --text: #e6e8f0;
    --muted: #9aa0b8;
    --accent: #818cf8;
    --accent-soft: #272b48;
    --ok: #4ade80;
    --ok-soft: #173024;
    --err: #fb923c;
    --err-soft: #3a2218;
    --warn: #facc15;
    --warn-soft: #352e12;
    --grid: #232736;
    --edge: #6b7290;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 14px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre, .mono { font-family: var(--mono); font-size: 12.5px; }
pre {
  margin: 0;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  overflow: auto;
  max-height: 360px;
  white-space: pre-wrap;
  word-break: break-word;
}
h1 { font-size: 20px; margin: 0; }
h2 { font-size: 16px; margin: 0 0 10px; }
h3 { font-size: 13px; margin: 14px 0 6px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.spacer { flex: 1; }
[hidden] { display: none !important; }

/* top bar */
.topbar {
  display: flex; align-items: center; gap: 18px;
  padding: 0 20px; height: 54px;
  background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--text); font-size: 16px; }
.brand:hover { text-decoration: none; }
.logo { width: 24px; height: 24px; border-radius: 7px; background: linear-gradient(135deg, var(--accent), #a855f7); }
.topbar nav { display: flex; gap: 4px; }
.topbar nav a { padding: 6px 12px; border-radius: 8px; color: var(--muted); font-weight: 500; }
.topbar nav a.active, .topbar nav a:hover { background: var(--accent-soft); color: var(--accent); text-decoration: none; }

main { padding: 20px; max-width: 1400px; margin: 0 auto; }
main.full { max-width: none; padding: 0; }

/* controls */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  padding: 7px 13px; border-radius: 8px; font: inherit; font-weight: 500; cursor: pointer;
  white-space: nowrap;
}
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.busy { opacity: .75; cursor: progress; }
.btn.busy::before {
  content: ""; width: 11px; height: 11px; border-radius: 50%;
  border: 2px solid currentColor; border-right-color: transparent;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--err); }
.btn.danger:hover { border-color: var(--err); }
.btn.ghost { background: transparent; border-color: transparent; }
.btn.ghost:hover { background: var(--surface-2); }
.btn.small { padding: 4px 9px; font-size: 12px; }
.btn.icon { padding: 4px 8px; }
input, select, textarea {
  font: inherit; color: var(--text); background: var(--surface);
  border: 1px solid var(--border); border-radius: 8px; padding: 7px 10px; width: 100%;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
textarea { font-family: var(--mono); font-size: 12.5px; min-height: 90px; resize: vertical; }
input.tpl, textarea.tpl { font-family: var(--mono); font-size: 12.5px; }
input[type=checkbox] { width: auto; }
label.field { display: block; margin-bottom: 10px; }
label.field > span { display: block; font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 4px; }
.row { display: flex; gap: 8px; align-items: center; }
.row > * { min-width: 0; }
.grow { flex: 1; }
.check { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }

/* switch */
.switch { position: relative; display: inline-flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch .track { width: 34px; height: 20px; border-radius: 10px; background: var(--border); position: relative; transition: background .15s; }
.switch .track::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; transition: left .15s; box-shadow: 0 1px 2px rgba(0,0,0,.2); }
.switch input:checked + .track { background: var(--ok); }
.switch input:checked + .track::after { left: 16px; }
.switch input:focus-visible + .track { outline: 2px solid var(--accent); }

/* cards & tables */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card.pad { padding: 16px; }
.page-head { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; background: var(--surface-2); }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }
.table-wrap { overflow-x: auto; }
.empty { padding: 40px; text-align: center; color: var(--muted); }

.badge {
  display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 11.5px; font-weight: 600;
  background: var(--surface-2); color: var(--muted); white-space: nowrap;
}
.badge.success, .badge.true { background: var(--ok-soft); color: var(--ok); }
.badge.error, .badge.false { background: var(--err-soft); color: var(--err); }
.badge.running { background: var(--warn-soft); color: var(--warn); }
.badge.method { background: var(--accent-soft); color: var(--accent); font-family: var(--mono); }
.url { font-family: var(--mono); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 380px; display: inline-block; vertical-align: middle; }

/* login */
.login { max-width: 360px; margin: 12vh auto; }
.login h1 { margin-bottom: 4px; }
.login form { margin-top: 18px; }
.error-text { color: var(--err); font-size: 13px; min-height: 18px; }

/* toasts */
#toasts { position: fixed; right: 16px; bottom: 16px; display: flex; flex-direction: column; gap: 8px; z-index: 100; }
.toast { background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: 8px; box-shadow: var(--shadow); max-width: 380px; }
.toast.error { background: var(--err); color: #fff; }

/* modal */
.modal-bg { position: fixed; inset: 0; background: rgba(10, 12, 25, .45); display: flex; align-items: flex-start; justify-content: center; padding: 6vh 16px; z-index: 50; overflow: auto; }
.modal { width: 100%; max-width: 720px; padding: 20px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 14px; }

/* editor */
.editor { display: flex; flex-direction: column; height: calc(100vh - 54px); }
.editor-top { display: flex; align-items: center; gap: 10px; padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.editor-top .name { font-size: 16px; font-weight: 600; max-width: 340px; }
.dirty { color: var(--warn); font-size: 12px; }
.webhook-bar { display: flex; align-items: center; gap: 8px; padding: 8px 16px; background: var(--surface-2); border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.webhook-bar code { background: var(--surface); border: 1px solid var(--border); padding: 5px 9px; border-radius: 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: min(640px, 100%); }
.editor-body { flex: 1; display: grid; grid-template-columns: 150px 1fr 400px; min-height: 0; }
.palette { padding: 12px; border-right: 1px solid var(--border); background: var(--surface); overflow: auto; }
.palette-item {
  display: flex; align-items: center; gap: 8px; padding: 8px; margin-bottom: 6px;
  border: 1px solid var(--border); border-radius: 8px; cursor: grab; background: var(--surface); font-weight: 500; font-size: 13px;
}
.palette-item:hover { border-color: var(--accent); }
.dot { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.t-webhook { --c: var(--c-webhook); }
.t-if { --c: var(--c-if); }
.t-http { --c: var(--c-http); }
.t-set { --c: var(--c-set); }
.t-respond { --c: var(--c-respond); }
.dot { background: var(--c); }

.canvas-wrap { position: relative; overflow: auto; background-color: var(--bg);
  background-image: radial-gradient(var(--grid) 1.2px, transparent 1.2px); background-size: 20px 20px; }
.canvas { position: relative; width: 2400px; height: 1400px; }
.canvas svg.edges { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.edge { fill: none; stroke: var(--edge); stroke-width: 2; }
.edge.true { stroke: var(--ok); }
.edge.false { stroke: var(--err); }
.edge-hit { fill: none; stroke: transparent; stroke-width: 14; cursor: pointer; pointer-events: stroke; }
.edge.selected { stroke: var(--accent); stroke-width: 3; }
.edge.temp { stroke-dasharray: 5 5; stroke: var(--accent); }
.node {
  position: absolute; width: 180px; min-height: 64px; background: var(--surface);
  border: 1.5px solid var(--border); border-left: 5px solid var(--c); border-radius: 10px;
  box-shadow: var(--shadow); cursor: grab; user-select: none; touch-action: none;
}
.node.selected { border-color: var(--accent); border-left-color: var(--c); box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow); }
.node.dragging { cursor: grabbing; opacity: .9; }
.node .n-type { font-size: 10.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--c); font-weight: 700; padding: 8px 10px 0; }
.node .n-name { padding: 2px 10px 0; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.node .n-sub { padding: 0 10px 8px; font-size: 11.5px; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-family: var(--mono); }
.port {
  position: absolute; width: 14px; height: 14px; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--edge); cursor: crosshair; z-index: 2;
}
.port:hover { border-color: var(--accent); background: var(--accent-soft); transform: scale(1.2); }
.port.in { left: -8px; top: 25px; }
.port.out { right: -8px; top: 25px; }
.port.out.true { top: 14px; border-color: var(--ok); }
.port.out.false { top: 38px; border-color: var(--err); }
.port-label { position: absolute; right: -40px; font-size: 10px; font-weight: 700; }
.port-label.true { top: 12px; color: var(--ok); }
.port-label.false { top: 36px; color: var(--err); }
.node.drop-target { border-color: var(--accent); }
.canvas-hint { position: absolute; left: 16px; bottom: 12px; font-size: 12px; color: var(--muted); pointer-events: none; position: sticky; }

.panel { border-left: 1px solid var(--border); background: var(--surface); overflow: auto; padding: 16px; }
.panel-head { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.panel-head h2 { margin: 0; flex: 1; }
.kv-row { display: grid; grid-template-columns: 1fr 1.4fr auto; gap: 6px; margin-bottom: 6px; }
.set-row { display: grid; grid-template-columns: 1fr 1.4fr 90px auto; gap: 6px; margin-bottom: 6px; }
.group { border: 1px dashed var(--border); border-radius: 8px; padding: 10px; margin-bottom: 8px; background: var(--surface-2); }
.group-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; font-size: 12px; font-weight: 600; color: var(--muted); }
.group-head select { width: auto; padding: 3px 6px; }
.cond-row { display: grid; grid-template-columns: 1.2fr 1fr 1fr auto; gap: 6px; margin-bottom: 6px; }
.combinator { display: flex; align-items: center; gap: 8px; margin: 6px 0; font-size: 12px; color: var(--muted); }
.combinator select { width: auto; padding: 3px 6px; }
.expr { font-family: var(--mono); font-size: 12px; background: var(--accent-soft); color: var(--accent); padding: 8px 10px; border-radius: 8px; margin: 8px 0; word-break: break-word; }

.fields { border: 1px solid var(--border); border-radius: 8px; padding: 8px; max-height: 240px; overflow: auto; background: var(--surface-2); }
.field-chip {
  display: flex; align-items: center; gap: 8px; padding: 3px 6px; border-radius: 6px; cursor: pointer; font-family: var(--mono); font-size: 12px;
}
.field-chip:hover { background: var(--accent-soft); }
.field-chip .path { color: var(--accent); font-weight: 600; white-space: nowrap; }
.field-chip .val { color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.field-group { font-size: 11px; text-transform: uppercase; color: var(--muted); font-weight: 700; margin: 6px 4px 2px; }

.bottom { height: 230px; border-top: 1px solid var(--border); background: var(--surface); display: flex; flex-direction: column; min-height: 0; }
.bottom.collapsed { height: 38px; }
.tabs { display: flex; gap: 2px; padding: 0 10px; border-bottom: 1px solid var(--border); align-items: center; flex: none; }
.tab { padding: 9px 12px; cursor: pointer; border: none; background: none; color: var(--muted); font: inherit; font-weight: 500; border-bottom: 2px solid transparent; }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-body { flex: 1; overflow: auto; padding: 10px 14px; }
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); display: inline-block; }
.live-dot.on { background: var(--ok); box-shadow: 0 0 0 3px var(--ok-soft); }
.event { border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; margin-bottom: 8px; }
.event-head { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.event pre { margin-top: 6px; max-height: 160px; }

/* executions */
.filters { display: grid; grid-template-columns: 2fr 1.2fr 1fr 1fr 1fr auto; gap: 8px; margin-bottom: 14px; align-items: end; }
.filters label span { display: block; font-size: 11.5px; color: var(--muted); font-weight: 600; margin-bottom: 3px; }
.pager { display: flex; gap: 8px; align-items: center; justify-content: flex-end; padding: 10px 12px; }
.summary { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; margin-bottom: 16px; }
.summary div > span { display: block; font-size: 11.5px; color: var(--muted); font-weight: 600; text-transform: uppercase; }
.summary div > b { font-weight: 600; word-break: break-all; }
.steps { display: flex; flex-direction: column; gap: 10px; }
.step { border: 1px solid var(--border); border-left: 4px solid var(--c); border-radius: 10px; background: var(--surface); }
.step-head { display: flex; align-items: center; gap: 10px; padding: 10px 12px; flex-wrap: wrap; }
.step-body { padding: 0 12px 12px; }
.step-error { background: var(--err-soft); color: var(--err); padding: 8px 10px; border-radius: 8px; margin-bottom: 8px; font-family: var(--mono); font-size: 12.5px; word-break: break-word; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
details summary { cursor: pointer; color: var(--muted); font-size: 12.5px; margin: 6px 0; }
.cond-table td, .cond-table th { padding: 6px 8px; font-size: 12.5px; }

@media (max-width: 1100px) {
  .editor-body { grid-template-columns: 120px 1fr 330px; }
}
@media (max-width: 860px) {
  main { padding: 12px; }
  .topbar { padding: 0 12px; gap: 10px; }
  .editor { height: auto; }
  .editor-body { grid-template-columns: 1fr; }
  .palette { display: flex; gap: 6px; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--border); }
  .palette h3 { display: none; }
  .palette-item { margin: 0; flex: none; }
  .canvas-wrap { height: 60vh; }
  .panel { border-left: none; border-top: 1px solid var(--border); }
  .bottom { height: 300px; }
  .filters { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .hide-sm { display: none; }
}