:root {
  --bg: #0f172a;
  --panel: #0b1220;
  --muted: #94a3b8;
  --border: #1e293b;
  --text: #e5e7eb;
  --primary: #2563eb;
  --danger: #ef4444;

  /* Group colors */
  --buyer: #2563eb;
  --seller: #ef4444;
  --meta: #10b981;
  --line: #f59e0b;
  --totals: #8b5cf6;
}

* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  font: 14px/1.4 system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial;
  color: var(--text);
  background: #0b1020;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 10px;
  background: #0a0f1e;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar .btn {
  margin-right: 6px;
}
.topbar .right .btn {
  margin-left: 6px;
}

.btn {
  background: #121a33;
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
}
.btn:hover {
  background: #0f1730;
}
.btn.primary {
  background: #1e3a8a;
  border-color: #1c2b64;
}
.btn.primary:hover {
  background: #2541a2;
}
.btn.danger {
  background: #3a0d12;
  border-color: #641c1c;
}
.btn.danger:hover {
  background: #601a1a;
}

.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 6px;
  padding: 2px 6px;
  cursor: pointer;
}
.icon-btn:hover {
  color: #fff;
}

.layout {
  display: grid;
  grid-template-columns: 280px 1fr 300px;
  gap: 0;
  height: calc(100vh - 48px);
}

.sidebar {
  background: #0b1220;
  border-right: 1px solid var(--border);
  overflow: auto;
}
.sidebar.right {
  border-left: 1px solid var(--border);
}
.sidebar .sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: #0b1220;
  z-index: 5;
}
.sidebar .groups {
  padding: 10px;
}

.group {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 10px;
  background: #0c162d;
}
.group .group-title {
  font-weight: 600;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.group .fields {
  padding: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.field-btn {
  border: 1px solid var(--border);
  background: #101b36;
  color: var(--text);
  padding: 6px 8px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 12px;
}
.field-btn.active {
  outline: 2px solid #ffffff22;
  box-shadow: 0 0 0 2px currentColor inset;
}
.field-btn[data-count]:after {
  content: attr(data-count);
  margin-left: 6px;
  background: #0a1225;
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 999px;
  color: var(--muted);
}
.field-btn:hover {
  background: #0f1730;
}

.stage-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
}
.canvas-toolbar {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  background: #0b1220;
}
.canvas-toolbar .row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.canvas-toolbar .hint {
  color: var(--muted);
}

#stage {
  width: 100%;
  height: 100%;
  background: #0a0f1f;
  display: block;
  cursor: crosshair;
}

.panel {
  border-top: 1px solid var(--border);
  padding: 10px;
}
.panel h3 {
  margin: 8px 0;
  font-size: 14px;
}
.code {
  font-family: ui-monospace, SFMono-Regular, Consolas, Menlo, monospace;
  background: #0b1020;
  color: #cbd5e1;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 200px;
  overflow: auto;
}

.foot {
  border-top: 1px solid var(--border);
  background: #0b1220;
  padding: 8px 10px;
  color: var(--muted);
}

.badge {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 999px;
  border: 1px solid #00000033;
  font-size: 11px;
}
.badge.buyer {
  background: #1d2f60;
  color: #cfe0ff;
}
.badge.seller {
  background: #40191a;
  color: #ffd1d1;
}
.badge.meta {
  background: #0f3a2f;
  color: #cfeee4;
}
.badge.line {
  background: #3b2b0b;
  color: #ffe3af;
}
.badge.totals {
  background: #2e1f5e;
  color: #e5d8ff;
}

.hidden {
  display: none;
}
.sidebar.closed {
  width: 0;
  min-width: 0;
  display: none;
}

.lineitem-picker {
  margin-top: 8px;
}
.lineitem-picker input {
  background: #0e1530;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px;
  border-radius: 6px;
  width: 100%;
}