:root {
  --bg: #ffffff;
  --fg: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --panel: #f9fafb;
  --accent: #2563eb;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

.app {
  display: grid;
  /*grid-template-columns: 320px 1fr;*/
  grid-template-columns: 2fr 5fr;
  gap: 12px;
  padding: 12px;
  align-items: start;
}

.left {
  min-width: 320px;
}

.right {
  position: sticky;
  top: 12px;
  height: calc(100vh - 24px);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--panel);
  min-height: 0;
}

h2 {
  font-size: 14px;
  margin: 14px 0 6px;
  letter-spacing: .02em;
}

textarea {
  width: 100%;
  min-height: 160px;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12px;
  line-height: 1.45;
  background: #fff;
  color: #0f172a;
}

.source-tabs {
  display: flex;
  gap: 4px;
  margin: 14px 0 0;
  border-bottom: 1px solid var(--border);
}

.source-tab,
.work-tab {
  height: 30px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
}

.source-tab:hover,
.work-tab:hover {
  color: var(--fg);
  background: var(--panel);
}

.source-tab.active,
.work-tab.active {
  border-color: var(--border);
  background: #fff;
  color: var(--fg);
}

.source-panel,
.work-panel {
  display: none;
}

.source-panel.active,
.work-panel.active {
  display: block;
}

.source-panel h2 {
  margin-top: 10px;
}

.source-options.hidden {
  display: none;
}

.work-tabs {
  display: flex;
  gap: 4px;
  margin: 14px 0 0;
  border-bottom: 1px solid var(--border);
}

.mode-stack {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 0 4px;
}

.mode-stack select {
  height: 28px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: #0f172a;
  font-size: 12px;
}

.row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  padding: 8px 0 0;
}

label {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 6px;
  align-items: center;
  user-select: none;
}

input[type="text"],
input[type="number"] {
  height: 28px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: #0f172a;
  font-size: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  width: 36px;
}

input[type="checkbox"] {
  transform: translateY(1px);
}

.thin input[type="text"] {
  width: 48px;
}

.btn {
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: #0f172a;
  font-size: 12px;
  cursor: pointer;
}

.btn:hover {
  border-color: #cbd5e1;
}

.btn.primary {
  border-color: #bfdbfe;
  background: #eff6ff;
  color: #1d4ed8;
}

input.points {
  width: 100%;
  height: 28px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 12px;
  color: #0f172a;
}

input.points-grow {
  flex: 1 1 auto;
  min-width: 0;
  width: auto;
}

.controls {
  border: 1px solid var(--border);
  border-top: 0;
  border-radius: 0 0 10px 10px;
  padding: 10px;
  background: var(--panel);
}

.controls .group {
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  margin-top: 10px;
}

/* .controls .group-title {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
} */

.data-output {
  border: 1px solid var(--border);
  border-top: 0;
  border-radius: 0 0 10px 10px;
  padding: 10px;
  background: var(--panel);
}

.data-output-options {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 8px;
}

.label-output-options {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0 0 8px;
}

.data-output-options select {
  height: 28px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: #0f172a;
  font-size: 12px;
}

.data-output-text {
  min-height: 300px;
  resize: vertical;
  white-space: pre;
}

.canvas-wrap {
  flex: 1;
  position: relative;
  background: #fff;
  min-height: 0;
  overflow: hidden;
}


canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.drawing-opts {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px 10px;
  border-top: 1px solid var(--border);
  background: var(--panel);
  flex-wrap: wrap;
}

.muted {
  font-size: 12px;
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}