:root {
  color-scheme: light dark;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Fira Code', 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  --sidepane-collapse-duration: 0.24s;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  background: var(--body-gradient), var(--bg);
  color: var(--fg);
  color-scheme: dark;
  overflow: hidden;

  --bg: #121417;
  --fg: #f0f3f9;
  --muted: #9aa4b1;
  --muted-ghost: rgba(154, 164, 177, 0.22);
  --accent: #4bc0c8;
  --accent-strong: #2d99a7;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.12);
  --surface-raised: rgba(255, 255, 255, 0.04);
  --surface-glass: rgba(255, 255, 255, 0.06);
  --surface-hover: rgba(255, 255, 255, 0.12);
  --text-code-bg: rgba(255, 255, 255, 0.08);
  --sidepane-shell-bg: rgba(12, 15, 20, 0.85);
  --gutter-bg: rgba(255, 255, 255, 0.04);
  --selection-bg: rgba(75, 192, 200, 0.25);
  --plot-area-bg: rgba(5, 7, 12, 0.82);
  --log-panel-bg: rgba(10, 12, 16, 0.9);
  --log-entry-bg: rgba(255, 255, 255, 0.04);
  --log-entry-border: rgba(255, 255, 255, 0.08);
  --button-shadow: rgba(75, 192, 200, 0.18);
  --chip-border: rgba(255, 255, 255, 0.08);
  --body-gradient: radial-gradient(circle at top, rgba(43, 56, 80, 0.6), transparent 60%);
  --app-header-bg: linear-gradient(135deg, rgba(48, 58, 73, 0.7), rgba(24, 28, 36, 0.9));
  --sidepane-bg: linear-gradient(180deg, rgba(18, 20, 23, 0.95), rgba(18, 20, 23, 0.8));
  --pane-plot-bg: linear-gradient(180deg, rgba(14, 16, 20, 0.95), rgba(14, 16, 20, 0.8));
  --danger: #ff6b6b;

  --button-bg: var(--surface-glass);
  --button-border: var(--border);
  --button-hover-bg: var(--surface-hover);
  --button-disabled-opacity: 0.6;
  --toolbar-btn-bg: rgba(0, 0, 0, 0.08);
  --toolbar-btn-color: var(--muted);
  --toolbar-btn-border: var(--border);
  --toolbar-btn-active-bg: rgba(38, 139, 210, 0.22);
  --mode-switch-bg: transparent;
  --mode-switch-border: var(--border);
  --mode-option-color: var(--muted);
  --mode-option-active-color: var(--fg);
  --mode-option-hover-bg: rgba(255, 255, 255, 0.06);
  --accent-button-disabled-opacity: 0.82;
  --sidepane-setting-group-bg: rgba(255, 255, 255, 0.03);
}

body[data-theme="light"] {
  --bg: white;
  --fg: #073642;
  --muted: #90a3aa;
  --muted-ghost: rgba(144, 163, 170, 0.26);
  --accent: #268bd2;
  --accent-strong: #1d6fa5;
  --border: rgba(7, 54, 66, 0.12);
  --border-strong: rgba(7, 54, 66, 0.18);
  --surface-raised: rgba(255, 255, 255, 0.95);
  --surface-glass: rgba(255, 255, 255, 0.9);
  --surface-hover: rgba(38, 139, 210, 0.18);
  --text-code-bg: rgba(7, 54, 66, 0.1);
  --sidepane-shell-bg: white;
  --gutter-bg: rgba(7, 54, 66, 0.12);
  --selection-bg: rgba(38, 139, 210, 0.28);
  --plot-area-bg: rgba(255, 255, 255, 0.98);
  --log-panel-bg: rgba(255, 255, 255, 0.98);
  --log-entry-bg: rgba(7, 54, 66, 0.08);
  --log-entry-border: rgba(7, 54, 66, 0.18);
  --button-shadow: rgba(38, 139, 210, 0.22);
  --chip-border: rgba(7, 54, 66, 0.16);
  --body-gradient: radial-gradient(circle at top, rgba(255, 255, 255, 0.78), transparent 55%);
  --app-header-bg: white;
  --sidepane-bg: white;
  --pane-plot-bg: white;
  --danger: #d14343;

  --button-bg: var(--surface-glass);
  --button-border: var(--border);
  --button-hover-bg: var(--surface-hover);
  --toolbar-btn-bg: rgba(255, 255, 255, 0.7);
  --toolbar-btn-color: rgba(7, 54, 66, 0.58);
  --toolbar-btn-border: rgba(7, 54, 66, 0.18);
  --toolbar-btn-active-bg: rgba(38, 139, 210, 0.22);
  --mode-switch-bg: rgba(255, 255, 255, 0.92);
  --mode-switch-border: rgba(7, 54, 66, 0.18);
  --mode-option-color: rgba(7, 54, 66, 0.58);
  --mode-option-active-color: var(--fg);
  --mode-option-hover-bg: rgba(7, 54, 66, 0.12);
  --accent-button-disabled-opacity: 0.88;
  --sidepane-setting-group-bg: rgba(7, 54, 66, 0.08);

  color-scheme: light;
}

body[data-theme="light"] .cm-activeLine,
body[data-theme="light"] .cm-activeLineGutter {
  background-color: rgba(61, 57, 45, 0.03);
}

* {
  box-sizing: border-box;
}

#app-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(1rem, 4vw, 2.5rem);
  padding: 1rem 1rem 1rem clamp(1.5rem, 4vw, 3rem);
  border-bottom: 1px solid var(--border);
  background: var(--app-header-bg);
  backdrop-filter: blur(8px);
}

#title-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}



#header-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 0.75rem;
  justify-self: end;
}

.icon-button {
  width: 2.2rem;
  height: 2.2rem;
  min-width: unset;
  padding: 0;
  border-radius: 0.4rem;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  font-weight: 600;
}

#toggle-log {
  transition: transform 0.2s ease;
}

#toggle-log[data-expanded="true"] {
  transform: rotate(90deg);
}

#app-header h1 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  letter-spacing: 0.03em;
}

.title-accent {
  color: var(--accent);
  font-weight: 600;
}

.short-name {
  color: var(--muted);
  font-weight: 400;
}

#app-status {
  font-size: 0.95rem;
  color: var(--fg);
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  white-space: nowrap;
}

#app-status.error {
  color: var(--danger);
}

#app-status[data-state="warn"] {
  color: var(--accent);
}

#app-status #app-status-detail {
  color: var(--muted);
}

#app-status #app-status-detail:empty {
  display: none;
}

#app-shell {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
}

#split-shell {
  flex: 1;
  display: flex;
  min-height: 0;
  min-width: 0;
  position: relative;
  height: 100%;
  overflow: hidden;
  --plot-flex: 1.4;
  --sidepane-flex: 0.6;
}

.pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
}

#plot-pane {
  flex: var(--plot-flex);
  background: var(--pane-plot-bg);
  border-right: 1px solid var(--border);
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

#plot-stack {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  --plot-area-flex: 0.74;
  --brettli-flex: 0.26;
}

#plot-stack[data-brettli-collapsed="1"] {
  --plot-area-flex: 1;
  --brettli-flex: 0;
}

#plot-stack[data-brettli-collapsed="1"] #plot-table-resizer {
  pointer-events: none;
  opacity: 0.35;
}

#sidepane {
  flex: var(--sidepane-flex);
  background: var(--sidepane-bg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 355px;
}

#pane-resizer {
  flex: 0 0 6px;
  cursor: col-resize;
  background: var(--border);
  position: relative;
  transition: background 0.12s ease;
}

#pane-resizer::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2px;
  height: 32px;
  background: currentColor;
  transform: translate(-50%, -50%);
}

#pane-resizer:hover,
#pane-resizer:focus-visible,
#pane-resizer.dragging {
  background: var(--accent);
}

button {
  appearance: none;
  border: 1px solid var(--button-border);
  background: var(--button-bg);
  color: var(--fg);
  font: inherit;
  padding: 0.45rem 0.9rem;
  border-radius: 0.45rem;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.12s ease, border 0.12s ease;
}

button:hover:not(:disabled):not(.sidepane-mode-option) {
  background: var(--button-hover-bg);
}

button:disabled {
  opacity: var(--button-disabled-opacity);
  cursor: not-allowed;
}

.data-source-btn[data-active="true"] {
  color: var(--accent);
}


.sidepane-topbar-btn {
  display: inline-flex;
  height: 1.7rem;
  align-items: center;
  justify-content: center;
  padding: 0.4rem 0.7rem 0.3rem 0.7rem;
  margin: 0.35rem;
  font-size: 0.78rem;
  border-radius: 0.45rem;
  border: 1px solid var(--toolbar-btn-border);
  background: var(--toolbar-btn-bg);
  color: var(--toolbar-btn-color);
  backdrop-filter: blur(6px);
  transition: transform 0.12s ease,
    background 0.12s ease,
    color 0.12s ease,
    border-radius var(--sidepane-collapse-duration) ease;
}

.sidepane-topbar-btn:hover {
  color: var(--fg);
}

.sidepane-topbar-btn[data-pressed="true"] {
  color: var(--fg);
  border-color: var(--accent);
  background: var(--toolbar-btn-active-bg);
}

#run-btn {
  border-color: var(--accent-strong);
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  color: #ffffff;
}

#run-btn:hover:not(:disabled) {
  filter: brightness(1.05);
}

#run-btn:disabled {
  opacity: var(--accent-button-disabled-opacity);
  filter: none;
}

#sidepane-mode-switch {
  --mode-index: 0;
  --mode-count: 3;
  position: relative;
  display: grid;
  grid-template-columns: repeat(var(--mode-count), minmax(0, 1fr));
  align-items: stretch;
  flex: 1;
  min-width: 0;
  border-radius: 0.65rem 0.65rem 0 0;
  border: 1px solid var(--mode-switch-border);
  margin-top: 0.7rem;
  background: var(--mode-switch-bg);
  overflow: hidden;
}

.sidepane-mode-option {
  position: relative;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.32rem 0;
  color: var(--mode-option-color);
  cursor: pointer;
  z-index: 1;
  transition: color 0.14s ease, background 0.14s ease;
  user-select: none;
}

.sidepane-mode-option:not([data-pressed="true"]):hover {
  background: var(--mode-option-hover-bg);
  color: var(--mode-option-active-color);
  border-radius: 0;
}

.sidepane-mode-option[data-pressed="true"] {
  color: var(--mode-option-active-color);
}

.sidepane-mode-option:focus-visible {
  outline: none;
  color: var(--mode-option-active-color);
}

#sidepane-mode-highlight {
  position: absolute;
  top: 0;
  left: calc(var(--mode-index) * (100% / var(--mode-count)));
  width: calc(100% / var(--mode-count));
  height: 100%;
  border-radius: 0;
  background: var(--mode-option-hover-bg);
  transition: left 0.22s cubic-bezier(0.4, 0, 0.2, 1), background 0.22s ease;
  z-index: 0;
  pointer-events: none;
}

#sidepane-toggle-label {
  display: inline-block;
  transform-origin: center;
  letter-spacing: 0;
  transition: transform var(--sidepane-collapse-duration) ease,
    letter-spacing var(--sidepane-collapse-duration) ease,
    opacity 0.12s ease;
}

.editor-shortcut code {
  background: var(--text-code-bg);
  padding: 0.1rem 0.35rem;
  border-radius: 0.35rem;
}

#sidepane-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.2rem;
  padding: 0;
}

body[data-sidepane-collapsed="1"] #sidepane-topbar .sidepane-topbar-btn {
  margin: 0;
  border-radius: 0;
  border-left: none;
  border-right: none;
}

body[data-sidepane-collapsed="1"] #sidepane-container,
body[data-sidepane-collapsed="1"] #editor-footer,
body[data-sidepane-collapsed="1"] #sidepane-mode-switch,
body[data-sidepane-collapsed="1"] #vim-toggle,
body[data-sidepane-collapsed="1"] #run-btn {
  display: none;
}

body[data-sidepane-collapsed="1"] #sidepane-toggle {
  align-self: stretch;
  justify-content: center;
  padding: 0;
  min-height: 8.4rem;
  width: 100%;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  border-radius: 0;
  border-left: none;
  border-right: none;
}

body[data-sidepane-collapsed="1"] #sidepane-toggle #sidepane-toggle-label {
  letter-spacing: 0.08rem;
}

body[data-sidepane-collapsed="1"] #pane-resizer {
  display: none;
}

body[data-sidepane-collapsed="1"] #sidepane {
  background: transparent;
  flex: 0 0 2rem;
  min-width: 0;
}

body[data-sidepane-collapsed="1"] #plot-pane {
  flex: 1 1 auto;
}

em {
  color: var(--accent);
  font-style: normal;
  font-weight: bold;
}

#editor {
  flex: 1;
  border: 1px solid var(--border-strong);
  overflow: hidden;
  background: var(--sidepane-shell-bg);
  min-height: 380px;
  height: 100%;
  min-width: 0;
}

.sidepane-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

#sidepane-settings-tab {
  flex: 1;
}

.sidepane-content[hidden] {
  display: none;
}

#sidepane-settings {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
  min-height: 0;
  padding: 0.5rem;
  overflow-y: auto;
  background: var(--sidepane-shell-bg);
  border: 1px solid var(--border-strong);
  box-sizing: border-box;
}

#sidepane-setup {
  flex: 1;
  display: flex;
  padding: 0.5rem;
  background: var(--sidepane-shell-bg);
  border: 1px solid var(--border-strong);
  box-sizing: border-box;
  min-height: 0;
}

#setup-grid {
  flex: 1;
  display: grid;
  grid-template-rows: 1fr 0.33fr 0.66fr 0.66fr;
  gap: 0.5rem;
  min-height: 0;
  width: 100%;
}

.setup-block {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  background: var(--sidepane-shell-bg);
  border: 1px solid var(--border-strong);
  padding: 0.35rem 0.4rem;
  box-sizing: border-box;
}

.setup-block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.setup-head-actions {
  display: flex;
  align-items: center;
}

.setup-block-title {
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--fg);
  letter-spacing: 0.02em;
}

.setup-reset-btn {
  border: none;
  background: none;
  color: var(--muted);
  font: inherit;
  font-size: 0.68rem;
  cursor: pointer;
  padding: 0.1rem 0.25rem;
  border-radius: 0.25rem;
  transition: color 0.12s ease;
}

.setup-head-actions span {
  font: inherit;
  font-size: 0.68rem;
  width: 1.2em;
  text-align: center;
}

.setup-head-actions span.help {
  color: var(--muted);
  cursor: help;
}

.setup-head-actions span.ok {
  display: none;
  color: var(--accent);
}

.setup-head-actions span.eager {
  display: none;
  color: var(--accent);
  cursor: pointer;
}

.setup-head-actions span.working {
  display: none;
  color: var(--accent);
  cursor: wait;
}

.setup-head-actions span.err {
  display: none;
  color: var(--danger);
  cursor: pointer;
}

.setup-run-reload {
  color: var(--muted);
  font: inherit;
  font-size: 0.72rem;
  cursor: pointer;
  padding: 0 0.15rem;
}

.setup-run-reload:hover {
  color: var(--fg);
}

#setup-varies-tidy {
  border: none;
  background: none;
  font: inherit;
  font-size: 0.68rem;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
}

#setup-varies-tidy[data-active="true"] {
  color: var(--accent);
}

.setup-reset-btn:hover:not(:disabled),
.setup-reset-btn:focus-visible {
  color: var(--accent);
  outline: none;
}

.setup-reset-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.setup-block-body {
  flex: 1;
  min-height: 0;
}

.setup-editor {
  border: 1px solid var(--border-strong);
  background: var(--sidepane-shell-bg);
  overflow: hidden;
}

.setup-editor .cm-activeLine,
.setup-editor .cm-activeLineGutter {
  background: transparent;
}

.cm-placeholder {
  color: var(--fg);
  opacity: 0.4;
}

.setup-editor[data-state="pending"] {
  border-color: var(--border-strong);
}

.setup-editor[data-state="ok"] {
  border-color: var(--accent);
}

.setup-editor[data-state="error"] {
  border-color: var(--danger);
}

#setup-run-block {
  padding: 0.35rem 0;
}

#setup-run-block .setup-block-title {
  margin-left: 0.4rem;
}

#setup-run-block .setup-head-actions {
  margin-right: 0.4rem;
}

#setup-run-list {
  flex: 1;
  width: 100%;
  color: var(--muted);
  font-family: var(--font-mono);
  overflow: auto;
}

.run-tree-row {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.1rem 0.15rem;
  padding-left: calc(var(--depth, 0) * 0.9rem + 0.15rem);
  font-size: 0.68rem;
}

.run-tree-row:hover {
  background: rgba(255, 255, 255, 0.06);
}

.run-tree-expand {
  background: none;
  border: none;
  color: var(--muted);
  font: inherit;
  line-height: 1;
  padding: 0;
  cursor: pointer;
  width: 0.68rem;
  height: 0.68rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.run-tree-spacer {
  width: 0.68rem;
  height: 0.68rem;
}

.run-tree-checkbox {
  width: 0.68rem;
  height: 0.68rem;
  cursor: pointer;
  accent-color: var(--accent);
  margin: 0;
}

.run-tree-label {
  cursor: pointer;
  user-select: none;
  font-size: 0.68rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.25rem;
  flex: 1;
}

.run-tree-hint {
  color: var(--muted);
  opacity: 0.6;
  margin-left: auto;
  padding-left: 0.5rem;
}

.run-tree-copy {
  display: none;
  background: none;
  border: none;
  color: var(--muted);
  font: inherit;
  font-size: 0.68rem;
  padding: 0 0.1rem;
  cursor: pointer;
}

.run-tree-row:hover .run-tree-copy {
  display: inline-flex;
}

.setup-varies {
  margin: 0;
  background: var(--sidepane-shell-bg);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  white-space: pre-line;
  overflow: auto;
}

.setup-varies b {
  color: var(--accent);
}

.sidepane-setting {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  position: relative;
}

.sidepane-setting#smoothing-setting {
  align-items: flex-start;
}

.sidepane-setting-label {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  flex: 0 0 auto;
}

.sidepane-setting-input {
  flex: 1;
  position: relative;
  display: flex;
  min-width: 5ch;
}

.sidepane-setting-input > input,
.sidepane-setting-input > select {
  flex: 1;
  min-width: 5ch;
  border: 1px solid var(--border-strong);
  background: var(--sidepane-shell-bg);
  color: var(--fg);
  font: inherit;
  font-size: 0.78rem;
  padding: 0.4rem 0.55rem;
  border-radius: 0.4rem;
  outline: none;
}

.settings-pill-toggle {
  flex: 0 0 auto;
  border: none;
  background: none;
  color: var(--muted);
  font: inherit;
  font-size: 0.68rem;
  padding: 0.2rem 0.35rem;
  margin-left: -0.3rem;
  cursor: pointer;
  height: 100%;
  line-height: 1;
  text-transform: lowercase;
  border-radius: 0.3rem;
  transition: color 0.12s ease;
}

.settings-pill-toggle[aria-pressed="true"] {
  color: var(--accent);
  background: var(--sidepane-setting-group-bg);
}

.settings-pill-toggle:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 1px;
}

#settings-fig-stretch-toggle {
  margin-left: 0.35rem;
  border: 1px solid var(--border-strong);
  background: var(--sidepane-shell-bg);
  color: var(--fg);
  font: inherit;
  font-size: 0.7rem;
  padding: 0.35rem 0.55rem;
  border-radius: 0.4rem;
  cursor: pointer;
  line-height: 1;
  min-width: 2.2rem;
  transition: border-color 0.12s ease, color 0.12s ease;
}

#settings-fig-stretch-toggle:hover,
#settings-fig-stretch-toggle:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.sidepane-setting-input.axis-limit-row {
  align-items: center;
  gap: 0.5rem;
}

.axis-limit-field {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex: 1;
  padding: 0.32rem 0.45rem;
  border: 1px solid var(--border-strong);
  border-radius: 0.4rem;
  background: var(--sidepane-shell-bg);
  transition: border-color 0.12s ease;
  min-width: 0;
}

.axis-limit-field:focus-within {
  border-color: var(--accent);
}

.axis-limit-toggle {
  border: none;
  background: none;
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  line-height: 1;
  padding: 0;
  cursor: pointer;
  transition: color 0.12s ease;
}

.axis-limit-toggle:hover {
  background: none !important;
}

.axis-limit-toggle:focus-visible {
  outline: none;
  color: var(--accent);
}

.axis-limit-field.is-shared .axis-limit-toggle,
.axis-limit-toggle.is-active {
  color: var(--accent);
}

.axis-limit-input {
  border: none;
  background: transparent;
  color: var(--fg);
  font: inherit;
  font-size: 0.78rem;
  padding: 0;
  width: 100%;
  min-width: 0;
  outline: none;
}

.axis-limit-input::placeholder {
  color: var(--muted);
  opacity: 1;
}

.axis-limit-field.is-shared .axis-limit-input::placeholder {
  color: var(--accent);
}

#settings-smoothing {
  display: flex;
  flex-direction: column;
  width: 100%;
}

#smooth-setting-label {
  margin-top: 0.7em;
}

#smoothing-options-row {
  display: flex;
  align-items: stretch;
  gap: 0.45rem;
  width: 100%;
}

.smoothing-chip {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--chip-border);
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  background: var(--sidepane-shell-bg);
  transition: border-color 0.14s ease, background 0.14s ease, color 0.14s ease;
  flex: 0 0 auto;
  cursor: pointer;
}

.smoothing-chip-label {
  color: var(--muted);
  font: inherit;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  white-space: pre;  /* Keep the final space for spacing. */
}

.smoothing-chip.is-active {
  border-color: var(--border);
  background: var(--mode-option-hover-bg);
}

.smoothing-chip.is-active .smoothing-chip-label {
  color: var(--fg);
}

.smoothing-chip[data-mode="none"].is-active {
  border-color: var(--danger);
  background: rgba(255, 64, 64, 0.08);
}

.smoothing-chip[data-mode="none"].is-active .smoothing-chip-label {
  color: var(--danger);
}

.smoothing-chip-parameter {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  overflow: hidden;
  max-width: 0;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.smoothing-chip.is-active .smoothing-chip-parameter {
  max-width: 12rem;
  opacity: 1;
}

.smoothing-chip-input {
  width: 6ch;
  border: 1px solid var(--border-strong);
  background: var(--sidepane-shell-bg);
  color: var(--fg);
  font: inherit;
  font-size: 0.74rem;
  text-align: center;
  padding: 0.2rem;
  border-radius: 0.4rem;
  outline: none;
  transition: border-color 0.14s ease, background 0.14s ease;
  cursor: text;
}

.smoothing-chip-input:focus {
  border-color: var(--accent);
}

.smoothing-chip-input:disabled {
  color: var(--muted);
  background: transparent;
  border-color: var(--chip-border);
}

.smoothing-chip.is-active.is-invalid {
  border-color: var(--danger);
}

.smoothing-chip.is-active.is-invalid .smoothing-chip-input {
  border-color: var(--danger);
}

#smoothing-advanced-toggle {
  margin: auto 0 auto auto;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.74rem;
  padding: 0.15rem 0.35rem;
  transition: color 0.14s ease, background 0.14s ease;
}

#smoothing-advanced-toggle:hover,
#smoothing-advanced-toggle:focus-visible {
  color: var(--fg);
}

#settings-smoothing[data-advanced="open"] #smoothing-advanced-toggle {
  color: var(--fg);
}

#smoothing-advanced-row {
  display: flex;
  justify-content: flex-end;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.18s ease, opacity 0.18s ease, margin 0.18s ease;
}

#settings-smoothing[data-advanced="open"] #smoothing-advanced-row {
  opacity: 1;
  max-height: 4rem;
  margin-top: 0.1rem;
}

#smoothing-advanced-field {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  letter-spacing: 0.03em;
}

#smoothing-advanced-label {
  color: var(--muted);
}

#settings-smoothing-alpha {
  width: 4.5ch;
  border: 1px solid var(--border-strong);
  background: var(--sidepane-shell-bg);
  color: var(--fg);
  font: inherit;
  font-size: 0.74rem;
  padding: 0.28rem 0.45rem 0.28rem 0.35rem;
  border-radius: 0.4rem;
  text-align: right;
  outline: none;
  transition: border-color 0.14s ease;
}

#smoothing-advanced-input-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 0.1rem;
}

#smoothing-advanced-suffix {
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

#settings-smoothing-alpha:focus {
  border-color: var(--accent);
}

#smoothing-advanced-row.is-disabled #smoothing-advanced-label,
#smoothing-advanced-row.is-disabled #settings-smoothing-alpha {
  color: var(--muted);
}

#smoothing-advanced-row.is-disabled #settings-smoothing-alpha {
  border-color: var(--chip-border);
  background: transparent;
}

#smoothing-advanced-row.is-disabled #smoothing-advanced-suffix {
  color: var(--muted);
  opacity: 0.6;
}

#smoothing-advanced-row.is-invalid #settings-smoothing-alpha {
  border-color: var(--danger);
}

.axis-limit-separator {
  color: var(--muted);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

#settings-highlight {
  appearance: none;
}

.sidepane-setting-input > input:focus,
.sidepane-setting-input > select:focus {
  border-color: var(--accent);
}

.sidepane-setting-input.is-invalid > input {
  border-color: var(--danger);
}

.sidepane-setting-input.is-invalid .settings-chip-editor {
  border-color: var(--danger);
}

.settings-chip-editor {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  width: 100%;
  min-height: 2.1rem;
  padding: 0.25rem 0.35rem;
  border: 1px solid var(--border-strong);
  border-radius: 0.4rem;
  background: var(--sidepane-shell-bg);
  cursor: text;
  transition: border-color 0.12s ease;
}

.settings-chip-editor:focus-within {
  border-color: var(--accent);
}

.settings-chip-editor.is-empty::before {
  content: attr(data-placeholder);
  color: var(--muted);
  font-size: 0.75rem;
  pointer-events: none;
  opacity: 0.7;
}

.settings-chip-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  flex: 1;
  min-width: 5ch;
}

.settings-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--chip-border);
  background: var(--surface-glass);
  color: var(--fg);
  font-size: 0.72rem;
  user-select: none;
  flex: 0 0 auto;
}

.settings-chip.is-custom {
  border-style: dashed;
}

.settings-chip.is-armed {
  border-color: var(--danger);
  color: var(--danger);
}

.settings-chip-remove {
  background: none;
  background-color: transparent;
  border: none;
  color: inherit;
  font: inherit;
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

.settings-chip-remove:hover {
  background: none;
  background-color: transparent;
  color: var(--danger);
}

.settings-chip-remove:focus {
  background: none;
  background-color: transparent;
  outline: none;
  text-decoration: none;
}

.settings-chip-text {
  order: 1;
  min-width: 4ch;
  flex: 1;
  border: none;
  background: transparent;
  color: var(--fg);
  font: inherit;
  font-size: 0.78rem;
  padding: 0.2rem 0.25rem;
  outline: none;
}

.settings-chip-text::placeholder {
  color: var(--muted);
  opacity: 0.6;
}

.sidepane-setting-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  border-radius: 0.45rem;
  padding: 0.25rem 0.25rem 0.25rem 0.5rem;
  background: var(--sidepane-setting-group-bg);
  position: relative;
}

#sidepane-setting-inline {
  flex: 1;
}

.settings-dropdown-open #sidepane-settings {
  overflow: visible;
}

.settings-suggestions {
  position: absolute;
  top: calc(100% + 0.2rem);
  left: 0;
  right: 0;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 0.4rem;
  box-shadow: 0 0.5rem 1.25rem rgba(0, 0, 0, 0.35);
  padding: 0.2rem 0;
  max-height: 10rem;
  overflow-y: auto;
  z-index: 40;
}

.settings-suggestion-separator {
  height: 1px;
  margin: 0.2rem 0;
  background: var(--border-strong);
}

.settings-suggestion-item {
  display: block;
  width: 100%;
  padding: 0.35rem 0.6rem;
  border: none;
  background: transparent;
  color: var(--fg);
  font: inherit;
  font-size: 0.78rem;
  text-align: left;
  cursor: pointer;
}

.settings-suggestion-item.is-muted {
  color: var(--muted);
}

.settings-suggestion-item.is-active,
.settings-suggestion-item:hover,
.settings-suggestion-item:focus {
  background: var(--border-strong);
}

#sidepane-container {
  padding: 0;
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

#editor-footer {
  display: flex;
  align-items: stretch;
  gap: 0;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-top: none;
  overflow: hidden;
}

#editor-footer button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0.2rem 0.75rem;
  min-height: 2rem;
  border: 1px solid var(--toolbar-btn-border);
  border-right: none;
  border-radius: 0;
  background: var(--toolbar-btn-bg);
  color: var(--toolbar-btn-color);
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease, border 0.12s ease;
}

#editor-footer button:hover:not(:disabled) {
  background: var(--button-hover-bg);
  color: var(--fg);
}

#editor-footer button:last-child {
  border-right: 1px solid var(--toolbar-btn-border);
}

#editor-footer button:disabled {
  opacity: var(--button-disabled-opacity);
  cursor: not-allowed;
}

#reset-code-btn {
  flex: 1;
}

#editor-footer .editor-footer-toggle {
  flex: 0 0 3rem;
  width: 3rem;
  padding: 0;
}

#editor-footer .editor-footer-toggle[data-pressed="true"],
#editor-footer .editor-footer-toggle[data-pressed="true"]:hover:not(:disabled) {
  color: var(--accent);
}

.cm-editor {
  height: 100%;
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
  font-size: 0.70rem;
}

.cm-scroller {
  overflow: auto;
  height: 100%;
}

#plot {
  flex: var(--plot-area-flex);
  margin: 0;
  padding: 0;
  border-radius: 0;
  background: var(--plot-area-bg);
  border: none;
  min-height: 120px;
  position: relative;
  text-align: center;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#plot #plot-content {
  flex: 1;
  overflow: auto;
  height: 100%;
}

#plot #plot-banner {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 0.55rem 0.9rem;
  background: var(--plot-area-bg);
  color: var(--danger);
  font-weight: 700;
  pointer-events: none;
  opacity: 0;
  transform: translateY(-100%);
  transition: opacity 0.12s ease, transform 0.12s ease;
  z-index: 5;
  text-align: center;
}

#plot #plot-banner[data-active="1"] {
  opacity: 1;
  transform: translateY(0);
}

#plot .mpld3-figure {
  box-sizing: border-box;
  background: var(--muted);
}

#plot .mpld3-toolbar {
  top: 0.6rem;
  right: 0.6rem;
}

body[data-theme="light"] #plot .mpld3-figure {
  background: none;
}

#plot-table-resizer {
  flex: 0 0 6px;
  cursor: row-resize;
  background: var(--border);
  position: relative;
}

#plot-table-resizer::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 32px;
  height: 2px;
  background: currentColor;
  transform: translate(-50%, -50%);
}

#plot-table-resizer:hover,
#plot-table-resizer:focus-visible,
#plot-table-resizer.dragging {
  background: var(--accent);
}

#brettli-pane {
  flex: var(--brettli-flex);
  display: flex;
  flex-direction: column;
  min-height: 36px;
  border-top: 1px solid var(--border);
  background: var(--pane-plot-bg);
  position: relative;
}

#brettli-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.4rem 0.8rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--muted);
}

#brettli-title {
  font-weight: 600;
  color: var(--accent);
}

#brettli-container {
  flex: 1;
  overflow: auto;
  position: relative;
}

#brettli-container table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}

#brettli-container thead {
  position: sticky;
  top: 0;
  background: var(--pane-plot-bg);
  z-index: 1;
}

#brettli-container th,
#brettli-container td {
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
  white-space: nowrap;
}


.brettli-header-cell {
  white-space: nowrap;
}

.brettli-sort-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.8rem;
  line-height: 1;
  padding: 0.1rem 0.2rem;
  border-radius: 0.25rem;
  margin-right: 0.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.12s ease, background 0.12s ease;
}

.brettli-sort-btn:hover,
.brettli-sort-btn:focus-visible {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.06);
}

.brettli-sort-btn.is-active {
  color: var(--accent);
  background: rgba(75, 192, 200, 0.12);
}

body[data-theme="light"] .brettli-sort-btn:hover,
body[data-theme="light"] .brettli-sort-btn:focus-visible {
  background: rgba(7, 54, 66, 0.12);
}

body[data-theme="light"] .brettli-sort-btn.is-active {
  background: rgba(38, 139, 210, 0.18);
}

#brettli-container tbody tr:nth-child(2n) {
  background: rgba(255, 255, 255, 0.02);
}

body[data-theme="light"] #brettli-container tbody tr:nth-child(2n) {
  background: rgba(0, 0, 0, 0.03);
}

#brettli-container tbody tr.is-highlighted {
  background: rgba(255, 255, 255, 0.06);
}

.run-color-swatch {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  border-radius: 0.25rem;
  background: var(--run-color, #000000);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3);
}

#brettli-container th.brettli-header-cell-color,
#brettli-container td.brettli-color-cell {
  width: 1.3rem;
  min-width: 1.3rem;
  padding: 0 0.2rem;
  text-align: right;
}

#brettli-container th.brettli-header-cell-color {
  cursor: pointer;
  user-select: none;
}

#brettli-container th.brettli-header-cell-color.is-disabled {
  cursor: default;
}

#brettli-container th.brettli-header-cell-color:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.brettli-header-cell-color .run-color-swatch,
.brettli-color-cell .run-color-swatch {
  display: block;
  margin-left: auto;
  margin-right: 0;
}

.brettli-color-cell .run-color-swatch {
  cursor: pointer;
}

.run-color-swatch-header {
  pointer-events: none;
}

#brettli-container td.brettli-run-cell,
#brettli-container th.brettli-run-header {
  padding-left: 0.15rem;
}

#brettli-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1rem;
  color: var(--muted);
  pointer-events: none;
  transition: opacity 0.2s ease;
}

#brettli-pane[data-state="active"] #brettli-hint {
  opacity: 0;
}

#brettli-pane[data-state="active"] #brettli-hint::after {
  content: '';
}

.plot-placeholder {
  color: var(--muted);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  padding: 1.5rem;
  text-align: center;
}

#log-panel {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 50vh;
  background: var(--log-panel-bg);
  border-top: 1px solid var(--border);
  transform: translateY(100%);
  transition: transform 0.25s ease;
  display: flex;
  flex-direction: column;
  z-index: 30;
  pointer-events: none;
}

#log-panel.open {
  transform: translateY(0);
  pointer-events: auto;
  box-shadow: 0 -10px 20px rgba(0, 0, 0, 0.35);
}

#log-header {
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
  padding: 0.6rem 0.8rem 0.4rem;
}

#close-log {
  font-size: 1.3rem;
  line-height: 1;
}

#log-entries {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--fg);
}

.log-entry {
  background: var(--log-entry-bg);
  border: 1px solid var(--log-entry-border);
  border-left-width: 3px;
  border-radius: 0.65rem;
  padding: 0.55rem 0.7rem;
  line-height: 1.4;
}

.log-entry-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.log-entry.info {
  border-left-color: var(--accent);
}

.log-entry.warn {
  border-left-color: var(--accent-strong);
}

.log-entry.error {
  border-left-color: var(--danger);
}

.log-copy-btn {
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 0.45rem;
  border: 1px solid var(--border);
  background: var(--surface-glass);
  color: var(--fg);
  flex-shrink: 0;
}

.log-copy-btn:hover:not(:disabled) {
  background: var(--surface-hover);
}

.log-entry.error .log-copy-btn {
  border-color: var(--danger);
  color: var(--danger);
}

.log-entry time {
  font-size: 0.75rem;
  color: var(--muted);
  display: block;
  margin-bottom: 0.25rem;
}

.log-entry pre {
  margin: 0.4rem 0 0;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}