/* PunktSim */

:root {
  color-scheme: light;
  --page: #f4f3ef;
  --surface: #fcfcfb;
  --surface-2: #f0efeb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --grid: #e8e7e1;
  --axis: #c3c2b7;
  --link: #a9a79f;
  --border: rgba(11, 11, 11, 0.12);
  --accent: #2a78d6;
  --accent-ink: #ffffff;
  --accent-soft: #e3eefb;
  --danger: #c23434;
  --danger-soft: #fbeceb;
  --warn-soft: #fff3d6;
  --focus: #2a78d6;

  --tok-keyword: #6250d6;
  --tok-number: #1c5cab;
  --tok-string: #007100;
  --tok-comment: #7d7b75;
  --tok-def: #b84a1c;
  --tok-builtin: #0f7f5a;
  --tok-operator: #52514e;
  --error-line: #fbe3e1;
  --active-line: #f3f2ee;

  --radius: 8px;
  --font: system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #232321;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --grid: #2a2a28;
    --axis: #45453f;
    --link: #6d6c66;
    --border: rgba(255, 255, 255, 0.1);
    --accent: #3987e5;
    --accent-ink: #ffffff;
    --accent-soft: #1d2b3d;
    --danger: #e66767;
    --danger-soft: #3a1f1f;
    --warn-soft: #3a3016;
    --focus: #5598e7;

    --tok-keyword: #a99ff0;
    --tok-number: #86b6ef;
    --tok-string: #7fcf7f;
    --tok-comment: #8a8880;
    --tok-def: #f0a07a;
    --tok-builtin: #5fd0a8;
    --tok-operator: #c3c2b7;
    --error-line: #3d2222;
    --active-line: #222220;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  flex-direction: column;
  background: var(--page);
  color: var(--ink);
  font: 14px/1.4 var(--font);
}

h2,
h3 {
  margin: 0;
  font-weight: 600;
}

code,
pre {
  font-family: var(--mono);
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

[hidden] {
  display: none !important;
}

/* ------------------------------------------------------------ controls */

.btn {
  font: inherit;
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover {
  background: var(--surface-2);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  min-width: 72px;
  font-weight: 600;
}

.btn.primary:hover {
  filter: brightness(1.08);
}

.btn.primary.running {
  background: var(--surface);
  color: var(--accent);
}

.btn.ghost {
  border-color: transparent;
  background: transparent;
  color: var(--ink-2);
  padding: 3px 8px;
}

.btn.ghost:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.btn.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
  padding: 3px 10px;
}

.btn.attention {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.icon {
  font: inherit;
  width: 26px;
  height: 26px;
  flex: none;
  padding: 0;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
}

.icon:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.in {
  font: inherit;
  min-width: 0;
  padding: 4px 7px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--surface);
  color: var(--ink);
}

input.in {
  font-family: var(--mono);
  font-size: 13px;
}

select.in {
  padding: 4px 5px;
  cursor: pointer;
}

.in:focus {
  border-color: var(--focus);
  outline: none;
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.in.invalid {
  border-color: var(--danger);
  background: var(--danger-soft);
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--ink-2);
  cursor: pointer;
}

/* ------------------------------------------------------------ top bar */

.topbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px 14px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 7px;
  font-weight: 650;
  font-size: 15px;
  white-space: nowrap;
}

.name-input {
  width: 150px;
  font-family: var(--font) !important;
  font-size: 14px !important;
}

.run-controls,
.file-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.run-controls {
  margin-left: 6px;
}

.time {
  min-width: 90px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-2);
  margin-left: 4px;
}

.speed {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--ink-2);
}

#examples {
  max-width: 160px;
}

.spacer {
  flex: 1;
}

.py-status {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

.py-status[data-state="loading"]::before {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 6px;
  border: 2px solid var(--axis);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: -1px;
}

.py-status[data-state="ready"]::before {
  content: "●";
  color: #0ca30c;
  margin-right: 5px;
}

.py-status[data-state="error"] {
  color: var(--danger);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

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

.layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(300px, 360px) minmax(400px, 1fr) minmax(400px, 1.1fr);
  gap: 10px;
  padding: 10px;
}

.pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.pane-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  flex: none;
}

.pane-head h2 {
  font-size: 13px;
  letter-spacing: 0.02em;
}

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

.pane-head .btn.ghost:last-child,
.pane-head .check:first-of-type {
  margin-left: auto;
}

.pane-head.small {
  border-top: 1px solid var(--border);
  padding: 4px 8px 4px 12px;
}

.pane-head.small .btn {
  margin-left: auto;
}

.scroll {
  overflow: auto;
  min-height: 0;
}

/* ------------------------------------------------------------ code pane */

.editor {
  flex: 3 1 0;
  min-height: 160px;
  position: relative;
}

.editor .CodeMirror {
  position: absolute;
  inset: 0;
  height: auto;
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.5;
}

.output {
  flex: 1 1 0;
  min-height: 70px;
  padding: 8px 12px;
  background: var(--surface);
}

.log {
  margin: 0;
  font-size: 12.5px;
  white-space: pre-wrap;
  color: var(--ink-2);
}

.error {
  margin-bottom: 8px;
  padding: 8px 10px;
  border-left: 3px solid var(--danger);
  border-radius: 4px;
  background: var(--danger-soft);
}

.error-title {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--danger);
}

.error-where {
  font-size: 12px;
  color: var(--ink-2);
  margin-top: 2px;
}

.error-hint {
  margin-top: 4px;
  color: var(--ink);
}

.banner {
  flex: none;
  padding: 6px 12px;
  font-size: 13px;
  background: var(--accent-soft);
  border-bottom: 1px solid var(--border);
}

.banner.warn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--warn-soft);
}

/* CodeMirror theme */
.cm-s-lab.CodeMirror {
  background: var(--surface);
  color: var(--ink);
}

.cm-s-lab .CodeMirror-gutters {
  background: var(--surface);
  border-right: 1px solid var(--border);
}

.cm-s-lab .CodeMirror-linenumber {
  color: var(--muted);
}

.cm-s-lab .CodeMirror-cursor {
  border-left: 2px solid var(--ink);
}

.cm-s-lab .CodeMirror-activeline-background {
  background: var(--active-line);
}

.cm-s-lab .CodeMirror-selected,
.cm-s-lab .CodeMirror-focused .CodeMirror-selected {
  background: var(--accent-soft);
}

.cm-s-lab .CodeMirror-line::selection,
.cm-s-lab .CodeMirror-line > span::selection,
.cm-s-lab .CodeMirror-line > span > span::selection {
  background: var(--accent-soft);
}

.cm-s-lab .cm-keyword {
  color: var(--tok-keyword);
  font-weight: 600;
}

.cm-s-lab .cm-number {
  color: var(--tok-number);
}

.cm-s-lab .cm-string {
  color: var(--tok-string);
}

.cm-s-lab .cm-comment {
  color: var(--tok-comment);
  font-style: italic;
}

.cm-s-lab .cm-def {
  color: var(--tok-def);
}

.cm-s-lab .cm-builtin {
  color: var(--tok-builtin);
}

.cm-s-lab .cm-operator {
  color: var(--tok-operator);
}

.cm-s-lab .cm-variable,
.cm-s-lab .cm-variable-2,
.cm-s-lab .cm-property {
  color: var(--ink);
}

.cm-s-lab div.CodeMirror span.CodeMirror-matchingbracket {
  color: var(--accent);
  text-decoration: underline;
}

.CodeMirror.cm-s-lab pre.CodeMirror-placeholder {
  color: var(--muted);
  font-style: italic;
}

.cm-s-lab .cm-error-line {
  background: var(--error-line);
}

.cm-error-widget {
  margin: 2px 0 6px;
  padding: 6px 10px;
  border-left: 3px solid var(--danger);
  border-radius: 3px;
  background: var(--danger-soft);
  font-family: var(--font);
  font-size: 13px;
  white-space: normal;
}

.cm-error-msg {
  font-family: var(--mono);
  font-weight: 600;
  color: var(--danger);
}

.cm-error-hint {
  margin-top: 2px;
  color: var(--ink);
}

/* ------------------------------------------------------------ variables pane */

.vsec {
  padding: 10px 12px 12px;
  border-bottom: 1px solid var(--border);
}

.vsec h3 {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-2);
}

.vsec h3 .sub {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
  color: var(--muted);
}

.settings {
  display: grid;
  gap: 6px;
}

.settings label {
  display: grid;
  grid-template-columns: 112px 1fr 14px;
  align-items: center;
  gap: 6px;
  color: var(--ink-2);
}

.unit {
  color: var(--muted);
}

.prow {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 5px;
}

.prow .in {
  flex: 1;
}

.prow .in.name {
  flex: 0 0 76px;
}

.prow .kind {
  flex: 0 0 auto;
}

.eq {
  color: var(--muted);
}

.add {
  font: inherit;
  font-size: 13px;
  margin-top: 2px;
  padding: 3px 8px;
  border: 1px dashed var(--border);
  border-radius: 5px;
  background: none;
  color: var(--accent);
  cursor: pointer;
}

.add:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.builtin-vars {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 1px 7px;
  border-radius: 10px;
  background: var(--surface-2);
  font-size: 12px;
  color: var(--ink-2);
}

.chip b {
  font-family: var(--mono);
  color: var(--ink);
}

.body-card {
  margin-bottom: 8px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--body);
  border-radius: 6px;
  background: var(--surface);
}

.body-head {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 6px 5px 2px;
}

.body-name {
  flex: 1;
  font-weight: 600;
}

.swatch {
  flex: none;
  width: 22px;
  height: 22px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: none;
  cursor: pointer;
  overflow: hidden;
}

.swatch::-webkit-color-swatch-wrapper {
  padding: 0;
}

.swatch::-webkit-color-swatch {
  border: none;
  border-radius: 50%;
}

.swatch::-moz-color-swatch {
  border: none;
  border-radius: 50%;
}

.fixed {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 12px;
  color: var(--ink-2);
  cursor: pointer;
  margin: 0 2px;
}

.vars {
  padding: 2px 10px 6px;
}

.vrow {
  display: grid;
  grid-template-columns: 30px 1fr;
  align-items: center;
  column-gap: 6px;
  margin-bottom: 4px;
}

.vname {
  font-family: var(--mono);
  font-weight: 600;
  cursor: help;
}

.vec-in {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr;
  align-items: center;
  gap: 4px;
}

.comp {
  font-size: 11px;
  color: var(--muted);
}

.now {
  grid-column: 2;
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  min-height: 0;
}

.now:empty {
  display: none;
}

.head-now {
  padding: 0 10px 6px 34px;
}

.display {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 6px 10px 8px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--ink-2);
}

.display label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.in.small {
  width: 54px;
}

/* ------------------------------------------------------------ view pane */

.canvas-wrap {
  flex: 3 1 0;
  min-height: 220px;
  position: relative;
}

#world {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
}

#world:active {
  cursor: grabbing;
}

.plots {
  flex: 2 1 0;
  min-height: 120px;
  padding: 8px;
  border-top: 1px solid var(--border);
  background: var(--page);
}

.plots .empty {
  margin: 12px 4px;
  color: var(--muted);
}

.plot-card {
  margin-bottom: 8px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
}

.plot-head {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 6px 0 10px;
}

.series {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
}

.series-chip {
  padding-right: 2px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
}

.chip-x {
  border: 0;
  background: none;
  color: var(--muted);
  cursor: pointer;
  padding: 0 4px;
  font-size: 13px;
}

.chip-x:hover {
  color: var(--ink);
}

.add-series {
  font-size: 12px;
  max-width: 160px;
  border-style: dashed;
  color: var(--accent);
}

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

.xsel select {
  font-size: 12px;
  max-width: 130px;
}

.plot-area {
  position: relative;
  height: 170px;
}

.plot-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.tip {
  position: absolute;
  pointer-events: none;
  padding: 6px 9px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
  font-size: 12px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.tip-head {
  font-weight: 600;
  margin-bottom: 3px;
}

.tip-row {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--ink-2);
}

.tip-row b {
  margin-left: auto;
  padding-left: 10px;
  color: var(--ink);
}

.tip-row.muted {
  color: var(--muted);
}

/* ------------------------------------------------------------ toast & help */

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  padding: 9px 16px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--surface);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.2);
  z-index: 10;
}

.help {
  width: min(760px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--ink);
}

.help::backdrop {
  background: rgba(0, 0, 0, 0.35);
}

.help-head {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.help-body {
  padding: 4px 18px 18px;
}

.help-body h3 {
  margin: 16px 0 6px;
  font-size: 14px;
}

.help-body p {
  margin: 0 0 6px;
}

.help-body pre {
  margin: 6px 0;
  padding: 10px 12px;
  border-radius: 6px;
  background: var(--surface-2);
  font-size: 13px;
}

.help-body table {
  width: 100%;
  border-collapse: collapse;
}

.help-body td {
  padding: 5px 8px 5px 0;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.help-body td:first-child {
  width: 34%;
  white-space: nowrap;
}

.help-body code {
  font-size: 12.5px;
  padding: 0 3px;
  border-radius: 3px;
  background: var(--surface-2);
}

.help-body ul {
  margin: 0;
  padding-left: 20px;
}

.help-body li {
  margin-bottom: 3px;
}

/* ------------------------------------------------------------ smaller screens */

@media (max-width: 1250px) {
  .layout {
    grid-template-columns: minmax(300px, 1fr) minmax(380px, 1.2fr);
    grid-template-rows: minmax(0, 3fr) minmax(0, 2fr);
  }

  .vars-pane {
    grid-column: 1;
    grid-row: 2;
  }

  .code-pane {
    grid-column: 1;
    grid-row: 1;
  }

  .view-pane {
    grid-column: 2;
    grid-row: 1 / span 2;
  }
}

@media (max-width: 800px) {
  body {
    height: auto;
  }

  .layout {
    display: flex;
    flex-direction: column;
    padding: 8px 16px;
  }

  .topbar {
    padding: 8px 16px;
  }

  .run-controls {
    flex-wrap: wrap;
    margin-left: 0;
  }

  .code-pane {
    order: 1;
    height: 520px;
  }

  .view-pane {
    order: 2;
    height: 820px;
  }

  .vars-pane {
    order: 3;
    max-height: 600px;
  }

  .name-input {
    width: 130px;
  }
}