:root {
  --bg: #14161b;
  --panel: #1c1f26;
  --panel-2: #23262f;
  --border: #2e3340;
  --text: #c9ced9;
  --text-h: #f2f4f8;
  --muted: #7a8294;
  --accent: #6ea8ff;
  --accent-bg: rgba(110, 168, 255, 0.14);
  --accent-2: #b48cff;
  --ok: #58d68d;
  --err: #ff8a80;
  --mono: ui-monospace, 'JetBrains Mono', Consolas, monospace;
  --sans: system-ui, 'Segoe UI', Roboto, sans-serif;

  color-scheme: dark;
  font: 14px/1.45 var(--sans);
  color: var(--text);
  background: var(--bg);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  height: 100vh;
  overflow: hidden;
}

#app {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---- Toolbar ---- */

.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex: none;
}

.toolbar select,
.toolbar button {
  font: inherit;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
}

.toolbar select {
  min-width: 180px;
}

.toolbar button:hover,
.toolbar select:hover {
  border-color: var(--accent);
}

.toolbar .spacer {
  flex: 1;
}

.toolbar .toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}

.toolbar .toggle input {
  accent-color: var(--accent);
}

/* ---- Body layout ---- */

.body {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 280px 1fr 460px;
  grid-template-rows: 1fr;
}

.sidebar,
.code-panel {
  min-height: 0;
  overflow-y: auto;
  background: var(--panel);
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 12px;
}

.sidebar h2 {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.viewport {
  position: relative;
  min-height: 0;
  overflow: hidden;
}

.viewport > div {
  position: absolute;
  inset: 0;
}

.viewport canvas {
  display: block;
}

/* ---- Params panel ---- */

.param-row {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 8px 4px;
  border-bottom: 1px solid var(--border);
}

.param-label {
  font-size: 12px;
  color: var(--muted);
  font-family: var(--mono);
}

.param-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.param-controls input[type='range'] {
  flex: 1;
  accent-color: var(--accent);
}

.param-controls input[type='number'] {
  width: 76px;
  font: inherit;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 6px;
}

.param-text {
  font: inherit;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 6px;
}

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

/* ---- Print check panel ---- */

.print-check {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.print-limits {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin-bottom: 10px;
}

.print-axis {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--muted);
}

.print-axis input {
  width: 56px;
  font: inherit;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 6px;
}

.print-dim {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-h);
  margin-bottom: 4px;
}

.print-fit {
  font-size: 12px;
  line-height: 1.4;
}

.print-fit.ok {
  color: var(--ok);
}

.print-fit.fail {
  color: var(--err);
}

/* ---- Code panel ---- */

.code-panel {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--border);
}

.code-header {
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  flex: none;
}

#editor {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

#editor .cm-editor {
  height: 100%;
  font-size: 13px;
}

#editor .cm-scroller {
  font-family: var(--mono);
  line-height: 1.5;
}

#status {
  flex: none;
  padding: 8px 12px;
  font-size: 12px;
  font-family: var(--mono);
  color: var(--muted);
  border-top: 1px solid var(--border);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 90px;
  overflow-y: auto;
}

#status.error {
  color: var(--err);
  background: rgba(255, 138, 128, 0.06);
}

#status.ok {
  color: var(--ok);
}

/* ---- Help modal ---- */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 10, 14, 0.72);
  backdrop-filter: blur(2px);
  padding: 24px;
}

.modal-overlay[hidden] {
  display: none;
}

.modal {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  width: min(760px, 100%);
  max-height: 86vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  flex: none;
}

.modal-header h2 {
  margin: 0;
  font-size: 16px;
  color: var(--text-h);
}

.modal-close {
  font: inherit;
  font-size: 20px;
  line-height: 1;
  color: var(--muted);
  background: transparent;
  border: none;
  border-radius: 6px;
  width: 30px;
  height: 30px;
  cursor: pointer;
}

.modal-close:hover {
  color: var(--text-h);
  background: var(--panel-2);
}

.modal-body {
  padding: 8px 20px 20px;
  overflow-y: auto;
}

.modal-body section {
  margin-top: 16px;
}

.modal-body h3 {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-2);
}

.modal-body ul {
  margin: 0;
  padding-left: 18px;
}

.modal-body li {
  margin: 5px 0;
}

.modal-body code {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--text-h);
}

.modal-body dl.api {
  margin: 0;
}

.modal-body dl.api dt {
  margin-top: 10px;
}

.modal-body dl.api dt code {
  color: #9ecbff;
}

.modal-body dl.api dd {
  margin: 4px 0 0 0;
  color: var(--muted);
  font-size: 13px;
}

.modal-body pre {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--text);
  margin: 0;
}

/* ---- CodeMirror tooltips / completion (dark theme) ---- */

.cm-editor .cm-tooltip {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  color: var(--text);
}

.cm-editor .cm-tooltip-autocomplete {
  overflow: hidden;
}

.cm-editor .cm-tooltip-autocomplete ul li {
  padding: 2px 8px;
}

.cm-editor .cm-tooltip-autocomplete ul li[aria-selected] {
  background: var(--accent-bg);
  color: var(--text-h);
}

.cm-editor .cm-tooltip-autocomplete ul li .cm-completionDetail {
  font-style: normal;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  margin-left: 6px;
}

.cm-editor .cm-tooltip.cm-completionInfo {
  background: var(--panel);
  padding: 8px 10px;
  max-width: 320px;
  font-size: 12px;
  line-height: 1.45;
}

.cm-tooltip-shape {
  padding: 8px 10px;
  max-width: 320px;
  font-family: var(--sans);
}

.cm-tooltip-shape .shape-sig {
  font-family: var(--mono);
  font-size: 12px;
  color: #9ecbff;
  margin-bottom: 4px;
}

.cm-tooltip-shape .shape-desc {
  font-size: 12px;
  line-height: 1.45;
  color: var(--muted);
}

.cm-editor .cm-diagnostic {
  font-family: var(--mono);
  font-size: 12px;
}