:root {
  --bg: #f6f5f3;
  --surface: #ffffff;
  --sunken: #faf9f7;
  --text: #1d1c1a;
  --muted: #8b867e;
  --line: #e9e6e1;
  --accent: #4a5fd8;
  --accent-soft: #eceffc;
  --ok: #1f8a5b;
  --ok-soft: #e7f4ed;
  --bad: #c2453a;
  --bad-soft: #fbeceb;
  --warn: #a8741a;
  --warn-soft: #faf2e2;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", system-ui, sans-serif;
  --radius: 14px;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #111110;
  --surface: #181716;
  --sunken: #141413;
  --text: #ebe9e5;
  --muted: #8a857d;
  --line: #292826;
  --accent: #8b9cf5;
  --accent-soft: #20233a;
  --ok: #52c08d;
  --ok-soft: #14261d;
  --bad: #ef7f73;
  --bad-soft: #2c1a18;
  --warn: #d9a441;
  --warn-soft: #2a2314;
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111110;
    --surface: #181716;
    --sunken: #141413;
    --text: #ebe9e5;
    --muted: #8a857d;
    --line: #292826;
    --accent: #8b9cf5;
    --accent-soft: #20233a;
    --ok: #52c08d;
    --ok-soft: #14261d;
    --bad: #ef7f73;
    --bad-soft: #2c1a18;
    --warn: #d9a441;
    --warn-soft: #2a2314;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }

/* header */
.top {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 18px 32px 6px;
}
.top .spacer { flex: 1; }
.brand { font-weight: 650; font-size: 16px; letter-spacing: -0.01em; }
.icon-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
}
.icon-btn.small { width: 28px; height: 28px; border-radius: 8px; }
.icon-btn:hover { background: var(--line); color: var(--text); }
.clock {
  width: auto;
  padding: 5px 10px;
  border-radius: 9px;
  font-size: 12px;
  background: transparent;
  color: var(--muted);
}

/* segmented controls */
.seg { display: inline-flex; gap: 2px; }
.seg button {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 9px;
  transition: background .15s, color .15s;
}
.seg button:hover { color: var(--text); }
.seg button[aria-pressed="true"] { background: var(--surface); color: var(--text); box-shadow: 0 0 0 1px var(--line); }
#examples { padding-left: 24px; border-left: 1px solid var(--line); }

/* layout */
.layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .8fr) minmax(0, 1.35fr);
  gap: 20px;
  padding: 14px 32px 32px;
}
.column { display: flex; flex-direction: column; gap: 20px; min-height: 0; min-width: 0; }
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
}
.grow-3 { flex: 4 1 0; }
.grow-2 { flex: 5 1 0; }
.fill { flex: 1 1 0; }

.card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px 6px;
}
.card-head h2 {
  flex: 1;
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
}
.card-head .icon-btn { margin-right: -8px; }

/* editor */
.editor {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  font: 12.5px/21px var(--mono);
}
.editor .gutter {
  flex: none;
  min-width: 44px;
  padding: 8px 10px 8px 20px;
  text-align: right;
  color: var(--muted);
  opacity: .55;
  overflow: hidden;
  user-select: none;
  white-space: pre;
}
.editor .gutter .bad { color: var(--bad); opacity: 1; font-weight: 600; }
.editor .gutter .warn { color: var(--warn); opacity: 1; font-weight: 600; }
.editor .stage { position: relative; flex: 1; min-width: 0; }
.editor .marks {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  padding: 8px 0;
}
.editor .marks div { height: 21px; }
.editor .marks .bad { background: var(--bad-soft); box-shadow: inset 2px 0 0 var(--bad); }
.editor .marks .warn { background: var(--warn-soft); box-shadow: inset 2px 0 0 var(--warn); }
.editor .marks .flash { background: var(--accent-soft); }
.editor textarea {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 8px 20px 8px 8px;
  border: 0;
  outline: 0;
  resize: none;
  background: transparent;
  font: inherit;
  white-space: pre;
  overflow: auto;
  tab-size: 2;
  caret-color: var(--accent);
}
.editor.drop { outline: 2px dashed var(--accent); outline-offset: -8px; }

.issues {
  list-style: none;
  margin: 0;
  padding: 10px 20px 14px;
  border-top: 1px solid var(--line);
  max-height: 28%;
  overflow: auto;
  background: var(--sunken);
}
.issues li {
  display: flex;
  gap: 12px;
  padding: 3px 0;
  cursor: pointer;
  color: var(--warn);
}
.issues li.error { color: var(--bad); }
.issues .pos { flex: none; font: 12px/1.7 var(--mono); opacity: .8; min-width: 44px; }
.issues .where { flex: none; font-weight: 550; }
.issues li:hover .msg { text-decoration: underline; }

/* form */
.fields { flex: 1; min-height: 0; overflow: auto; padding: 14px 20px 24px; display: flex; flex-direction: column; gap: 16px; }
label, .field > .label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
}
input, select, textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--sunken);
  font: 13px var(--mono);
  color: var(--text);
  outline: 0;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
select { appearance: none; padding-right: 28px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' fill='none' stroke='%238b867e' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M1 1l4 4 4-4'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 11px center; }
.card-head select { width: auto; padding: 4px 28px 4px 10px; font-size: 12.5px; max-width: 60%; }
.fields .group { display: flex; flex-direction: column; gap: 14px; padding: 2px 0 2px 14px; border-left: 1px solid var(--line); }
.fields .group > .label, .fields .items > .label { color: var(--text); }
.switch { display: inline-flex; gap: 2px; padding: 2px; border-radius: 10px; background: var(--sunken); border: 1px solid var(--line); width: max-content; }
.switch button { border: 0; background: transparent; color: var(--muted); padding: 4px 14px; border-radius: 8px; font: 13px var(--mono); }
.switch button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); }
.items { display: flex; flex-direction: column; gap: 10px; }
.item { display: flex; gap: 8px; align-items: flex-start; }
.item > :first-child { flex: 1; min-width: 0; }
.add { align-self: flex-start; border: 1px dashed var(--line); background: transparent; color: var(--muted); border-radius: 9px; padding: 3px 12px; }
.add:hover { color: var(--accent); border-color: var(--accent); }
.hint { color: var(--muted); font-weight: 400; font-family: var(--mono); }

/* result */
.result-body { padding: 4px 20px 6px; display: flex; flex-direction: column; gap: 10px; }
.result-body .name { color: var(--muted); font-size: 12px; }
.verdict { font-size: 26px; font-weight: 620; letter-spacing: -0.015em; line-height: 1.2; word-break: break-word; }
.pairs { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 3px 22px; margin: 0; font: 13px/1.6 var(--mono); max-height: 160px; overflow: auto; }
.pairs dt { color: var(--muted); }
.pairs dd { margin: 0; word-break: break-word; }
.error { color: var(--bad); font: 13px/1.6 var(--mono); white-space: pre-wrap; word-break: break-word; }
.chip {
  padding: 2px 11px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font: 12px/1.6 var(--mono);
}
.chip.quiet { background: var(--sunken); color: var(--muted); box-shadow: inset 0 0 0 1px var(--line); }

/* graph */
.graph { flex: 1; min-height: 0; overflow: auto; padding: 8px 20px 20px; display: flex; }
.graph svg { margin: auto; max-width: 100%; max-height: 100%; height: auto; flex: none; }
.edge { fill: none; stroke: var(--line); stroke-width: 1.4; }
.edge.live { stroke: var(--muted); opacity: .75; }
.arrow { fill: none; stroke: var(--muted); stroke-width: 1.2; stroke-linecap: round; stroke-linejoin: round; opacity: .6; }
.node rect { fill: var(--sunken); stroke: var(--line); stroke-width: 1.2; transition: fill .15s, stroke .15s; }
.node text { fill: var(--text); font: 12.5px var(--sans); pointer-events: none; }
.node .value { fill: var(--muted); font: 11px var(--mono); }
.node.input text { fill: var(--muted); }
.node.decision rect { fill: var(--surface); stroke: var(--muted); stroke-opacity: .5; }
.node.bkm rect, .node.service rect { stroke-dasharray: 4 3; }
.node.missing rect { stroke: var(--bad); stroke-dasharray: 3 3; }
.node.done rect { stroke: var(--accent); stroke-opacity: 1; fill: var(--accent-soft); }
.node.done .name { fill: var(--accent); }
.node.selected rect { fill: var(--accent); stroke: var(--accent); }
.node.selected .name { fill: var(--surface); }
.node.selected .value { fill: var(--surface); opacity: .8; }
.node.clickable { cursor: pointer; outline: none; }
.node.clickable:hover rect { stroke: var(--accent); stroke-opacity: 1; }
.node.clickable:focus-visible rect { stroke: var(--accent); stroke-width: 2; }

/* tables */
.tables { flex: 1; min-height: 0; overflow: auto; padding: 4px 20px 22px; display: flex; flex-direction: column; gap: 26px; }
.dt-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.dt-head .title { font-weight: 600; }
.dt-head .grow { flex: 1; }
.dt { width: 100%; border-collapse: separate; border-spacing: 0; font: 12.5px/1.45 var(--mono); }
.dt th {
  text-align: left;
  font: 500 11.5px var(--sans);
  color: var(--muted);
  padding: 4px 12px 7px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.dt th.out { color: var(--text); }
.dt td { padding: 6px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.dt tr:last-child td { border-bottom: 0; }
.dt td.n { width: 1%; color: var(--muted); padding-left: 10px; padding-right: 6px; opacity: .7; }
.dt td.out { font-weight: 550; }
.dt .dash { color: var(--muted); }
.dt tr.hit td { background: var(--accent-soft); }
.dt tr.hit td:first-child { box-shadow: inset 2px 0 0 var(--accent); color: var(--accent); opacity: 1; }
.dt tr.hit td.out { color: var(--accent); }
.dt.judged tr:not(.hit) td { opacity: .5; }
.dt-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; }
.dt-wrap .dt th:first-child, .dt-wrap .dt td:first-child { padding-left: 12px; }
.dt-section.focus .title { color: var(--accent); }
.empty { color: var(--muted); }

/* FEEL */
.feel { flex: 1; min-height: 0; display: flex; justify-content: center; padding: 28px 32px 32px; overflow: auto; }
.feel-card { width: min(760px, 100%); padding: 28px; gap: 22px; align-self: flex-start; }
.expr input { font-size: 17px; padding: 14px 16px; border-radius: 12px; }
.ctx textarea { resize: vertical; line-height: 1.55; }
.feel-result { display: flex; flex-direction: column; gap: 10px; min-height: 64px; }
.feel-result .row { display: flex; align-items: center; gap: 12px; }

@media (max-width: 1100px) {
  .layout { grid-template-columns: 1fr; padding: 14px 16px 24px; }
  .top { padding: 14px 16px 4px; gap: 14px; flex-wrap: wrap; }
  #examples { padding-left: 0; border-left: 0; }
  .grow-3, .grow-2, .fill { flex: none; }
  .editor { flex: none; height: 380px; }
  .fields, .tables { max-height: 520px; }
  .graph { min-height: 220px; }
  body { height: auto; display: block; }
  html, body { height: auto; }
  .feel { padding: 14px 16px 24px; }
}

@media (min-width: 1101px) {
  body { height: 100vh; }
}