:root {
  --ink: #16181d;
  --paper: #f6f3ea;
  --paper-soft: #ebe7dc;
  --night: #111218;
  --night-2: #181923;
  --panel: #ffffff;
  --muted: #626977;
  --muted-light: #c4c8d2;
  --line: rgba(22, 24, 29, 0.15);
  --line-strong: rgba(22, 24, 29, 0.28);
  --line-light: rgba(255, 255, 255, 0.16);
  --blue: #2667ff;
  --green: #30c26d;
  --amber: #d98d18;
  --red: #e45f5f;
  --teal: #29c7b8;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.5;
  overflow-x: hidden;
}

body::selection {
  background: var(--blue);
  color: white;
}

body.has-formula-library-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 0.75rem max(1rem, calc((100% - 1540px) / 2));
  border-bottom: 1px solid var(--line-light);
  background: rgba(17, 18, 24, 0.94);
  color: white;
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  gap: 1rem;
  align-items: center;
  min-width: 0;
}

.brand > div {
  min-width: 0;
}

.app-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 176px;
  min-height: 48px;
  padding: 0.45rem 0.6rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.94);
}

.app-logo img {
  width: 100%;
  height: auto;
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.15rem, 2vw, 1.75rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.brand p {
  margin: 0.25rem 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
  overflow-wrap: anywhere;
}

.topbar-actions {
  display: grid;
  gap: 0.55rem;
  justify-items: end;
  width: 100%;
  min-width: 0;
}

.app-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: white;
  cursor: pointer;
}

.app-menu-toggle span {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1.15rem;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 160ms ease, opacity 160ms ease;
  transform: translate(-50%, -50%);
}

.app-menu-toggle span:nth-child(1) {
  transform: translate(-50%, calc(-50% - 0.4rem));
}

.app-menu-toggle span:nth-child(3) {
  transform: translate(-50%, calc(-50% + 0.4rem));
}

.app-menu-toggle:hover,
.app-menu-toggle:focus-visible {
  border-color: var(--blue);
  outline: 3px solid rgba(38, 103, 255, 0.18);
}

.app-menu-toggle.is-open span:nth-child(1) {
  transform: translate(-50%, -50%) rotate(45deg);
}

.app-menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.app-menu-toggle.is-open span:nth-child(3) {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.tool-nav,
.file-actions,
.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  max-width: 100%;
  min-width: 0;
}

.file-actions {
  justify-content: flex-end;
}

.export-menu-wrapper {
  position: relative;
  min-width: 0;
}

.export-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 0.4rem);
  z-index: 20;
  display: grid;
  min-width: 180px;
  padding: 0.35rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: rgba(17, 18, 24, 0.98);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.32);
}

.export-menu[hidden] {
  display: none;
}

.export-menu button {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 0.65rem 0.75rem;
  background: transparent;
  color: rgba(255, 255, 255, 0.84);
  cursor: pointer;
  font-weight: 800;
}

.export-menu button:hover,
.export-menu button:focus-visible {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: white;
  outline: none;
}

.button,
.calc-nav,
.mini-apply {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 800;
  line-height: 1.1;
  text-align: center;
}

.button {
  padding: 0.62rem 0.78rem;
}

.button-primary {
  background: var(--green);
  color: #07100b;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #5ee38e;
  outline: 2px solid rgba(94, 227, 142, 0.36);
  outline-offset: 2px;
}

.button-secondary {
  border-color: var(--line);
  background: white;
  color: var(--ink);
}

.topbar .button-secondary {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.08);
  color: white;
}

.button-secondary:hover,
.button-secondary:focus-visible,
.topbar .button-secondary:hover,
.topbar .button-secondary:focus-visible {
  border-color: var(--blue);
  outline: 3px solid rgba(38, 103, 255, 0.18);
}

.is-active-tool {
  border-color: rgba(48, 194, 109, 0.65) !important;
  background: rgba(48, 194, 109, 0.16) !important;
  color: white !important;
}

.electronics-workspace,
.formula-lab-workspace {
  display: grid;
  grid-template-columns: minmax(230px, 280px) minmax(0, 1fr) minmax(280px, 340px);
  gap: 1rem;
  width: min(calc(100% - clamp(1rem, 2vw, 2rem)), 1900px);
  margin: 0 auto;
  padding: 1rem 0 2rem;
  align-items: start;
}

.formula-lab-workspace {
  grid-template-columns: minmax(250px, 320px) minmax(0, 1fr) minmax(300px, 360px);
}

.electronics-workspace {
  grid-template-columns: 260px minmax(0, 1fr) 340px;
  width: 100%;
  max-width: none;
  padding-right: clamp(0.75rem, 1.1vw, 1.25rem);
  padding-left: clamp(0.75rem, 1.1vw, 1.25rem);
}

.formula-lab-app.is-library-collapsed .formula-lab-workspace {
  grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
}

.control-panel,
.formula-panel,
.calc-panel {
  border: 1px solid var(--line);
  background: var(--panel);
  min-width: 0;
}

.control-panel,
.formula-panel {
  position: sticky;
  top: 88px;
  max-height: calc(100vh - 104px);
  overflow: auto;
}

.panel-section,
.formula-panel,
.calc-panel {
  padding: 1rem;
}

.panel-section + .panel-section,
.preset-panel,
.sanity-panel,
.related-panel {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
}

.section-heading h2,
.calculator-head h2 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.15;
  letter-spacing: 0;
}

.section-heading span,
.calculator-head > span,
.calculator-head-tools span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-soft);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 900;
  white-space: nowrap;
}

.conventions-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 0.65rem;
  align-items: center;
  cursor: pointer;
  list-style: none;
}

.conventions-summary::-webkit-details-marker {
  display: none;
}

.conventions-summary span {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1.15;
}

.conventions-summary small {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 900;
  text-align: right;
  white-space: nowrap;
}

.conventions-summary:focus-visible {
  border-radius: 6px;
  outline: 3px solid rgba(38, 103, 255, 0.18);
  outline-offset: 4px;
}

.conventions-summary::after {
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  content: "";
  transform: rotate(45deg);
  transition: transform 160ms ease;
}

.conventions-panel[open] .conventions-summary::after {
  transform: rotate(225deg);
}

.conventions-body {
  display: grid;
  gap: 0.85rem;
  margin-top: 0.9rem;
}

.calculator-menu-toggle {
  display: none;
  width: 100%;
  margin-top: 0.8rem;
}

.calculator-menu-icon {
  position: relative;
  width: 1rem;
  height: 0.7rem;
  margin-right: 0.5rem;
  border-top: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
}

.calculator-menu-icon::before {
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  border-top: 2px solid currentColor;
  content: "";
  transform: translateY(-50%);
}

.calculator-menu-shell {
  display: grid;
  gap: 0.85rem;
  margin-top: 0.85rem;
}

.calc-nav-list {
  display: grid;
  gap: 0.35rem;
}

.calc-nav {
  justify-content: flex-start;
  width: 100%;
  min-height: 38px;
  padding: 0.55rem 0.65rem;
  border-color: transparent;
  background: transparent;
  color: var(--muted);
  text-align: left;
}

.calc-nav:hover,
.calc-nav:focus-visible {
  border-color: rgba(38, 103, 255, 0.24);
  background: rgba(38, 103, 255, 0.07);
  color: var(--ink);
  outline: none;
}

.calc-nav.is-active {
  border-color: rgba(38, 103, 255, 0.34);
  border-left: 4px solid var(--blue);
  background: rgba(38, 103, 255, 0.1);
  color: var(--ink);
}

.field,
.check-field {
  display: grid;
  gap: 0.42rem;
  min-width: 0;
  font-weight: 800;
}

.check-field {
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  margin: 0.9rem 0;
  color: var(--muted);
}

.field span,
.check-field span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 900;
}

input,
select,
textarea {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.62rem 0.7rem;
  background: #fbfaf5;
  color: var(--ink);
}

textarea {
  min-height: 126px;
  resize: vertical;
}

input[type="checkbox"] {
  width: 1.1rem;
  min-height: 1.1rem;
  accent-color: var(--blue);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--blue);
  outline: 3px solid rgba(38, 103, 255, 0.18);
}

.field-grid,
.calc-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.calc-form-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.unit-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(78px, 104px);
  gap: 0.45rem;
  align-items: center;
}

.reference-mini {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.9rem;
  padding: 0.85rem;
  border: 1px solid rgba(38, 103, 255, 0.16);
  border-left: 4px solid var(--blue);
  background: rgba(38, 103, 255, 0.06);
  color: var(--muted);
  font-size: 0.88rem;
}

.reference-mini p {
  margin: 0;
}

.formula-library {
  min-width: 0;
}

.formula-library-backdrop {
  display: none;
}

.formula-library-heading {
  align-items: center;
}

.formula-library-icon {
  font-family: "Cascadia Mono", Consolas, monospace;
  font-weight: 900;
}

.formula-search-field {
  margin-top: 0.85rem;
}

.formula-example-list {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.85rem;
}

.category-filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.85rem;
}

.category-chip {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.35rem 0.62rem;
  background: #fbfaf5;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 900;
}

.category-chip:hover,
.category-chip:focus-visible {
  border-color: rgba(38, 103, 255, 0.35);
  background: rgba(38, 103, 255, 0.08);
  color: var(--ink);
  outline: none;
}

.category-chip.is-active {
  border-color: rgba(48, 194, 109, 0.45);
  background: rgba(48, 194, 109, 0.14);
  color: #16753d;
}

.formula-library-empty {
  padding: 0.8rem;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  background: #fbfaf5;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.formula-example-button {
  display: grid;
  gap: 0.28rem;
  width: 100%;
  min-height: 0;
  padding: 0.7rem;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.formula-example-button:hover,
.formula-example-button:focus-visible {
  border-color: rgba(38, 103, 255, 0.24);
  background: rgba(38, 103, 255, 0.07);
  outline: none;
}

.formula-example-button.is-active {
  border-color: rgba(38, 103, 255, 0.34);
  border-left: 4px solid var(--blue);
  background: rgba(38, 103, 255, 0.1);
}

.formula-example-button.is-recent {
  border-left: 4px solid var(--green);
}

.formula-example-button span {
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 900;
  text-transform: uppercase;
}

.formula-example-button strong {
  line-height: 1.15;
}

.formula-example-button code {
  color: var(--muted);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.76rem;
  overflow-wrap: anywhere;
}

.symbol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(62px, 1fr));
  gap: 0.4rem;
  margin-top: 0.85rem;
}

.symbol-button {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fbfaf5;
  color: var(--ink);
  cursor: pointer;
  font-family: "Cascadia Mono", Consolas, monospace;
  font-weight: 900;
}

.symbol-button:hover,
.symbol-button:focus-visible {
  border-color: rgba(38, 103, 255, 0.42);
  background: rgba(38, 103, 255, 0.08);
  outline: 3px solid rgba(38, 103, 255, 0.14);
}

.formula-editor {
  display: grid;
  gap: 1rem;
}

.active-formula-card {
  display: grid;
  gap: 0.28rem;
  padding: 0.75rem 0.85rem;
  border: 1px solid rgba(38, 103, 255, 0.18);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  background: rgba(38, 103, 255, 0.06);
}

.active-formula-card span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
}

.active-formula-card strong {
  line-height: 1.15;
}

.active-formula-card code {
  color: var(--muted);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.82rem;
  overflow-wrap: anywhere;
}

.active-formula-card.is-custom {
  border-left-color: var(--amber);
  background: rgba(217, 141, 24, 0.08);
}

.calculator-head-tools {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: flex-end;
}

.help-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  min-width: 32px;
  min-height: 32px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fbfaf5;
  color: var(--ink);
  cursor: pointer;
  font-weight: 900;
}

.help-toggle:hover,
.help-toggle:focus-visible,
.help-toggle[aria-expanded="true"] {
  border-color: rgba(38, 103, 255, 0.42);
  background: rgba(38, 103, 255, 0.1);
  outline: 3px solid rgba(38, 103, 255, 0.14);
}

.help-toggle.mobile-library-toggle {
  width: auto;
  min-width: 0;
  min-height: 34px;
  gap: 0.38rem;
  border-radius: 999px;
  padding: 0.34rem 0.68rem;
  font-size: 0.82rem;
  line-height: 1;
  white-space: nowrap;
}

.formula-help-panel {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 1rem;
  padding: 0.9rem;
  border: 1px solid rgba(38, 103, 255, 0.18);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  background: rgba(38, 103, 255, 0.06);
}

.formula-help-panel[hidden] {
  display: none;
}

.formula-help-panel p,
.formula-help-panel ul {
  margin: 0;
  color: var(--muted);
}

.formula-help-panel ul {
  display: grid;
  gap: 0.45rem;
  padding-left: 1.1rem;
}

.formula-help-panel code {
  color: var(--ink);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.9em;
  font-weight: 800;
}

.formula-input {
  font-family: "Cascadia Mono", Consolas, monospace;
  line-height: 1.55;
}

.formula-pad {
  padding: 0.85rem;
  border: 1px solid rgba(38, 103, 255, 0.16);
  border-radius: 8px;
  background: rgba(38, 103, 255, 0.05);
}

.formula-pad .symbol-grid {
  margin-top: 0.75rem;
}

.solver-toolbar {
  display: grid;
  grid-template-columns: minmax(160px, 240px) auto auto;
  gap: 0.7rem;
  align-items: end;
}

.variable-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 0.85rem;
}

.variable-card {
  display: grid;
  gap: 0.45rem;
  min-width: 0;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfaf5;
}

.variable-name {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 900;
}

.target-range-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 0.85rem;
}

.result-options {
  display: grid;
  grid-template-columns: minmax(180px, 260px);
  margin-top: 0.85rem;
}

.formula-empty-state,
.formula-note {
  margin: 0;
  padding: 0.9rem;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  background: #fbfaf5;
  color: var(--muted);
  font-weight: 800;
}

.formula-empty-state {
  grid-column: 1 / -1;
}

.working-list {
  display: grid;
  gap: 0.65rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.working-list li {
  display: grid;
  gap: 0.3rem;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: 8px;
  background: #fbfaf5;
}

.working-list strong {
  color: var(--ink);
  font-size: 0.8rem;
}

.working-list code {
  color: var(--muted);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.8rem;
  line-height: 1.45;
  overflow-wrap: anywhere;
  white-space: normal;
}

.working-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 0.65rem;
  align-items: center;
  cursor: pointer;
  list-style: none;
}

.working-summary::-webkit-details-marker {
  display: none;
}

.working-summary span {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1.15;
}

.working-summary small {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-soft);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 900;
  white-space: nowrap;
}

.working-summary:focus-visible {
  border-radius: 6px;
  outline: 3px solid rgba(38, 103, 255, 0.18);
  outline-offset: 4px;
}

.working-summary::after {
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  content: "";
  transform: rotate(45deg);
  transition: transform 160ms ease;
}

.working-disclosure[open] .working-summary::after {
  transform: rotate(225deg);
}

#solverStatus[data-tone="success"] {
  border-color: rgba(48, 194, 109, 0.4);
  background: rgba(48, 194, 109, 0.14);
  color: #16753d;
}

#solverStatus[data-tone="warning"],
#solverStatus[data-tone="error"] {
  border-color: rgba(217, 141, 24, 0.4);
  background: rgba(217, 141, 24, 0.14);
  color: #8b570d;
}

@media (min-width: 901px) {
  .electronics-app {
    --bench-bg: #17191d;
    --bench-panel: #202329;
    --bench-panel-soft: #262a31;
    --bench-line: #3a404b;
    --bench-line-strong: #566070;
    --bench-text: #eef2f7;
    --bench-muted: #aeb7c4;
    --bench-muted-2: #7f8998;
    --bench-accent: #29c7b8;
    --bench-accent-strong: #14a596;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    height: 100vh;
    min-height: 0;
    overflow: hidden;
    background: var(--bench-bg);
    color: var(--bench-text);
  }

  .electronics-app .topbar {
    position: relative;
    top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 76px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--bench-line);
    background: #1b1e23;
    color: var(--bench-text);
    backdrop-filter: none;
  }

  .electronics-app .brand {
    gap: 12px;
  }

  .electronics-app .app-logo {
    width: 154px;
    min-height: 42px;
    padding: 0.35rem 0.5rem;
    border-radius: 6px;
  }

  .electronics-app .brand h1 {
    font-size: 18px;
    font-weight: 760;
    line-height: 1.1;
  }

  .electronics-app .brand p {
    max-width: min(52vw, 620px);
    margin-top: 2px;
    color: var(--bench-muted);
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .electronics-app .topbar-actions,
  .electronics-app .tool-nav,
  .electronics-app .file-actions,
  .electronics-app .control-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    max-width: none;
  }

  .electronics-app .topbar-actions {
    width: auto;
    justify-content: flex-end;
    justify-items: initial;
    min-width: 0;
  }

  .electronics-app .tool-nav {
    gap: 6px;
  }

  .electronics-app .file-actions {
    justify-content: flex-end;
    margin-left: 4px;
    padding-left: 12px;
    border-left: 1px solid var(--bench-line);
  }

  .electronics-app .button,
  .electronics-app .mini-apply {
    min-height: 36px;
    border: 1px solid var(--bench-line-strong);
    border-radius: 8px;
    padding: 0 13px;
    background: #2d323b;
    color: var(--bench-text);
    font-size: 13px;
    font-weight: 560;
    transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
  }

  .electronics-app .button:hover:not(:disabled),
  .electronics-app .button:focus-visible,
  .electronics-app .mini-apply:hover,
  .electronics-app .mini-apply:focus-visible {
    border-color: #778295;
    background: #353b45;
    outline: none;
  }

  .electronics-app .button:active:not(:disabled) {
    transform: translateY(1px);
  }

  .electronics-app .button-secondary {
    background: transparent;
  }

  .electronics-app .button-primary {
    border-color: var(--bench-accent-strong);
    background: var(--bench-accent-strong);
    color: #051615;
    font-weight: 720;
  }

  .electronics-app .tool-nav .button {
    min-height: 30px;
    padding: 0 9px;
    font-size: 12px;
  }

  .electronics-app .file-actions .button {
    min-height: 34px;
  }

  .electronics-app .is-active-tool {
    border-color: var(--bench-accent) !important;
    background: rgba(41, 199, 184, 0.18) !important;
    color: var(--bench-text) !important;
  }

  .electronics-app .electronics-workspace {
    grid-template-columns: 260px minmax(0, 1fr) 340px;
    gap: 0;
    width: 100%;
    max-width: none;
    min-height: 0;
    margin: 0;
    padding: 0;
    align-items: stretch;
  }

  .electronics-app .control-panel,
  .electronics-app .formula-panel,
  .electronics-app .calc-panel {
    min-width: 0;
    border: 0;
    background: var(--bench-panel);
    color: var(--bench-text);
  }

  .electronics-app .control-panel,
  .electronics-app .formula-panel {
    position: static;
    top: auto;
    max-height: none;
    min-height: 0;
    overflow: auto;
  }

  .electronics-app .control-panel {
    border-right: 1px solid var(--bench-line);
    padding: 16px;
  }

  .electronics-app .formula-panel {
    border-left: 1px solid var(--bench-line);
    padding: 16px;
  }

  .electronics-app .panel-section {
    margin: 0 0 18px;
    padding: 0 0 18px;
    border-bottom: 1px solid var(--bench-line);
  }

  .electronics-app .panel-section + .panel-section {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }

  .electronics-app .panel-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .electronics-app .section-heading h2,
  .electronics-app .calculator-head h2 {
    color: var(--bench-text);
    font-size: 13px;
    font-weight: 720;
  }

  .electronics-app .section-heading span,
  .electronics-app .calculator-head > span,
  .electronics-app .calculator-head-tools span {
    min-height: auto;
    border-color: var(--bench-line);
    border-radius: 8px;
    padding: 6px 9px;
    background: #1d2128;
    color: var(--bench-muted);
    font-size: 12px;
    font-weight: 560;
  }

  .electronics-app .conventions-summary span {
    color: var(--bench-text);
    font-size: 13px;
    font-weight: 720;
  }

  .electronics-app .conventions-summary small {
    color: var(--bench-muted);
    font-size: 12px;
    font-weight: 560;
  }

  .electronics-app .conventions-summary::after {
    border-color: var(--bench-muted);
  }

  .electronics-app .field,
  .electronics-app .check-field {
    gap: 7px;
    margin-bottom: 12px;
    font-weight: 400;
  }

  .electronics-app .field span,
  .electronics-app .check-field span,
  .electronics-app .field > span strong {
    color: var(--bench-muted);
    font-size: 12px;
    font-weight: 650;
  }

  .electronics-app input,
  .electronics-app select,
  .electronics-app textarea {
    min-height: 36px;
    border: 1px solid var(--bench-line);
    border-radius: 8px;
    padding: 0 10px;
    background: #191c21;
    color: var(--bench-text);
    outline: none;
  }

  .electronics-app input:focus,
  .electronics-app select:focus,
  .electronics-app textarea:focus {
    border-color: var(--bench-accent);
    box-shadow: 0 0 0 3px rgba(41, 199, 184, 0.12);
    outline: none;
  }

  .electronics-app input[type="checkbox"] {
    width: 16px;
    min-height: 16px;
    accent-color: var(--bench-accent);
  }

  .electronics-app .field-grid {
    gap: 10px;
  }

  .electronics-app .calc-form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .electronics-app .unit-row {
    grid-template-columns: minmax(0, 1fr) 96px;
    gap: 8px;
  }

  .electronics-app .calc-nav-list {
    gap: 8px;
  }

  .electronics-app .calc-nav {
    justify-content: space-between;
    min-height: 38px;
    border: 1px solid var(--bench-line);
    border-radius: 8px;
    padding: 0 11px;
    background: #191c21;
    color: var(--bench-muted);
    font-weight: 560;
  }

  .electronics-app .calc-nav:hover,
  .electronics-app .calc-nav:focus-visible {
    border-color: var(--bench-line-strong);
    background: #23272f;
    color: var(--bench-text);
    outline: none;
  }

  .electronics-app .calc-nav.is-active {
    border-color: var(--bench-accent);
    border-left: 1px solid var(--bench-accent);
    background: rgba(41, 199, 184, 0.14);
    color: var(--bench-text);
    font-weight: 720;
  }

  .electronics-app .reference-mini,
  .electronics-app #filterPlotReadout,
  .electronics-app #timingCurveReadout,
  .electronics-app #formulaBody p,
  .electronics-app #formulaBody li {
    color: var(--bench-muted);
    font-size: 12px;
  }

  .electronics-app .electronics-main {
    display: block;
    min-width: 0;
    min-height: 0;
    overflow: auto;
    padding: 18px;
    background:
      linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
      linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
      #14161a;
    background-size: 32px 32px;
  }

  .electronics-app .calc-panel {
    display: none;
    max-width: 1080px;
    padding: 0;
    background: transparent;
  }

  .electronics-app .calc-panel.is-active {
    display: grid;
    gap: 18px;
  }

  .electronics-app .calculator-head {
    gap: 16px;
    margin-bottom: 0;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--bench-line);
  }

  .electronics-app .calculator-head h2 {
    margin-bottom: 5px;
    font-size: 18px;
  }

  .electronics-app .calculator-head p {
    max-width: none;
    margin: 0;
    color: var(--bench-muted);
    font-size: 13px;
    line-height: 1.45;
  }

  .electronics-app .result-grid {
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 10px;
  }

  .electronics-app .metric-card {
    min-height: 92px;
    border: 1px solid var(--bench-line);
    padding: 12px;
    background: rgba(32, 35, 41, 0.92);
  }

  .electronics-app .metric-card span {
    color: var(--bench-muted);
    font-size: 12px;
    font-weight: 650;
  }

  .electronics-app .metric-card strong {
    color: var(--bench-text);
    font-size: 18px;
    font-weight: 780;
  }

  .electronics-app .metric-card small {
    color: var(--bench-muted-2);
    font-size: 12px;
  }

  .electronics-app .network-branch,
  .electronics-app .plot-panel,
  .electronics-app .preset-button,
  .electronics-app .related-link {
    border-color: var(--bench-line);
    background: rgba(29, 33, 40, 0.86);
    color: var(--bench-text);
  }

  .electronics-app .preset-button {
    border-left-color: var(--bench-accent);
  }

  .electronics-app .related-link {
    border-left-color: #2667ff;
  }

  .electronics-app .preset-button span,
  .electronics-app .related-link span,
  .electronics-app .related-link p {
    color: var(--bench-muted);
  }

  .electronics-app .circuit-diagram,
  .electronics-app #filterPlotCanvas,
  .electronics-app #timingCurveCanvas {
    border-color: var(--bench-line);
    background: #171a1f;
  }

  .electronics-app .sanity-panel {
    padding: 12px 0 14px;
    border-top: 1px solid var(--bench-line);
    border-bottom: 1px solid var(--bench-line);
  }

  .electronics-app .warning-card {
    border-color: rgba(244, 201, 93, 0.28);
    border-left-width: 1px;
    background: rgba(244, 201, 93, 0.08);
  }

  .electronics-app .warning-card strong {
    color: #f4c95d;
    font-size: 12px;
  }

  .electronics-app .warning-card p {
    color: var(--bench-muted);
    font-size: 12px;
  }

  .electronics-app #formulaBody h3,
  .electronics-app .formula-block h3,
  .electronics-app .related-link strong,
  .electronics-app .network-branch-head strong,
  .electronics-app .preset-button strong {
    color: var(--bench-text);
  }
}

@media (min-width: 901px) and (max-width: 1240px) {
  .electronics-app .electronics-workspace {
    grid-template-columns: 240px minmax(0, 1fr);
  }

  .electronics-app .formula-panel {
    grid-column: 1 / -1;
    border-top: 1px solid var(--bench-line);
    border-left: 0;
  }
}

.electronics-main {
  display: grid;
  gap: 1rem;
  min-width: 0;
}

.calc-panel {
  display: none;
}

.calc-panel.is-active {
  display: block;
}

.calculator-head {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
  min-width: 0;
}

.calculator-head > div {
  min-width: 0;
}

.calculator-head h2 {
  font-size: clamp(1.45rem, 2.5vw, 2rem);
}

.calculator-head p {
  max-width: 720px;
  margin: 0.4rem 0 0;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.section-subheading {
  margin-top: 1.2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.section-subheading .section-heading {
  margin-bottom: 0.8rem;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.metric-card {
  display: grid;
  gap: 0.35rem;
  align-content: space-between;
  min-height: 126px;
  padding: 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: #151821;
  color: white;
  overflow-wrap: anywhere;
}

.metric-card span {
  color: var(--muted-light);
  font-size: 0.78rem;
  font-weight: 900;
}

.metric-card strong {
  font-size: clamp(1.2rem, 1.8vw, 1.55rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.metric-card small {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.78rem;
}

.mini-apply {
  min-height: 28px;
  margin-left: 0.25rem;
  padding: 0.25rem 0.45rem;
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 0.72rem;
}

.mini-apply:hover,
.mini-apply:focus-visible {
  border-color: var(--green);
  outline: 2px solid rgba(48, 194, 109, 0.22);
}

.result-table {
  width: 100%;
  margin-top: 1rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: white;
}

.result-table table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
}

.result-table th,
.result-table td {
  padding: 0.7rem 0.75rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.result-table th {
  background: var(--paper-soft);
  font-size: 0.8rem;
  font-weight: 900;
  color: var(--muted);
}

.result-table tr:last-child td {
  border-bottom: 0;
}

.network-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.network-branch {
  display: grid;
  gap: 0.75rem;
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfaf5;
}

.network-branch-head {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
}

.network-branch-head strong {
  font-size: 0.95rem;
}

.network-branch .control-row {
  margin-top: 0.2rem;
}

.control-row {
  margin-top: 1rem;
}

.plot-panel {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  background: #fbfaf5;
}

#filterPlotCanvas,
#timingCurveCanvas {
  width: 100%;
  min-height: 260px;
  margin-top: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

#filterPlotReadout,
#timingCurveReadout {
  color: var(--muted);
}

.formula-panel .section-heading {
  margin-bottom: 0.8rem;
}

.circuit-diagram {
  margin-bottom: 1rem;
  padding: 0.7rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #151821;
}

.circuit-diagram svg {
  width: 100%;
  height: auto;
}

.preset-panel {
  margin-bottom: 1rem;
}

.preset-list {
  display: grid;
  gap: 0.65rem;
}

.preset-button {
  display: grid;
  gap: 0.25rem;
  width: 100%;
  min-height: 68px;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: 8px;
  background: #fbfaf5;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.preset-button:hover,
.preset-button:focus-visible {
  border-color: rgba(48, 194, 109, 0.42);
  outline: 3px solid rgba(48, 194, 109, 0.16);
}

.preset-button strong {
  line-height: 1.15;
}

.preset-button span {
  color: var(--muted);
  font-size: 0.88rem;
}

#formulaBody {
  display: grid;
  gap: 0.8rem;
}

#formulaBody h3 {
  margin: 0;
  font-size: 1rem;
}

#formulaBody p,
#formulaBody li {
  color: var(--muted);
}

#formulaBody p {
  margin: 0;
}

#formulaBody ul {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding-left: 1.1rem;
}

.sanity-panel {
  margin-bottom: 1rem;
}

.warning-card {
  display: grid;
  gap: 0.25rem;
  padding: 0.75rem;
  border: 1px solid rgba(217, 141, 24, 0.35);
  border-left: 4px solid var(--amber);
  border-radius: 8px;
  background: rgba(217, 141, 24, 0.08);
}

.warning-card strong {
  color: var(--ink);
}

.warning-card p {
  margin: 0;
  color: var(--muted);
}

.related-panel {
  margin-top: 1rem;
}

.related-links {
  display: grid;
  gap: 0.65rem;
}

.related-link {
  display: grid;
  gap: 0.25rem;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  background: #fbfaf5;
}

.related-link:hover,
.related-link:focus-visible {
  border-color: rgba(38, 103, 255, 0.42);
  outline: 3px solid rgba(38, 103, 255, 0.14);
}

.related-link.is-reference {
  border-left-color: var(--amber);
}

.related-link span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
}

.related-link strong {
  line-height: 1.15;
}

.related-link p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1rem;
  z-index: 30;
  max-width: min(92vw, 540px);
  padding: 0.8rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: rgba(17, 18, 24, 0.95);
  color: white;
  font-weight: 800;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 0.6rem);
  transition: opacity 160ms ease, transform 160ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 1240px) {
  .topbar {
    grid-template-columns: 1fr;
  }

  .topbar-actions {
    justify-items: start;
  }

  .file-actions {
    justify-content: flex-start;
  }

  .formula-lab-workspace {
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  }

  .electronics-workspace {
    grid-template-columns: 240px minmax(0, 1fr);
  }

  .formula-panel {
    grid-column: 1 / -1;
    position: static;
    max-height: none;
  }

  .formula-lab-app.is-library-collapsed .formula-lab-workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .topbar {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    padding: 0.65rem;
    min-width: 0;
    overflow: visible;
  }

  .brand {
    align-items: flex-start;
    width: 100%;
    max-width: 100%;
  }

  .app-logo {
    width: 146px;
  }

  .app-menu-toggle {
    position: relative;
    display: inline-flex;
    justify-self: end;
  }

  .topbar-actions {
    display: none;
    grid-column: 1 / -1;
    width: 100%;
    max-width: 100%;
    margin-top: 0.55rem;
    padding: 0.65rem;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 8px;
    background: rgba(17, 18, 24, 0.98);
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.32);
    justify-items: stretch;
  }

  .topbar.is-menu-open .topbar-actions {
    display: grid;
  }

  .tool-nav,
  .file-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .topbar .button,
  .file-actions .button {
    width: 100%;
    min-width: 0;
    white-space: normal;
  }

  .export-menu-wrapper {
    width: 100%;
  }

  .tool-nav .is-active-tool {
    grid-column: 1 / -1;
  }

  .electronics-workspace,
  .formula-lab-workspace {
    grid-template-columns: 1fr;
    width: calc(100% - 1rem);
    padding-top: 0.5rem;
  }

  .formula-lab-workspace .formula-solver-panel {
    order: 1;
  }

  .formula-lab-workspace .formula-lab-notes {
    order: 2;
  }

  .formula-library-backdrop {
    position: fixed;
    inset: 0;
    z-index: 30;
    display: block;
    border: 0;
    background: rgba(17, 18, 24, 0.46);
    cursor: pointer;
  }

  .formula-library-backdrop[hidden],
  .formula-library[hidden] {
    display: none !important;
  }

  .formula-lab-workspace .formula-library {
    display: none;
    position: fixed;
    left: 0.5rem;
    right: 0.5rem;
    bottom: 0.5rem;
    z-index: 40;
    max-height: min(78vh, 680px);
    overflow: auto;
    border-radius: 8px;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  }

  .formula-lab-app.is-library-open .formula-lab-workspace .formula-library {
    display: block;
  }

  .formula-lab-workspace .formula-library .panel-section {
    padding: 0.85rem;
  }

  .formula-library-heading {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto;
  }

  .formula-library-heading .mobile-library-close {
    justify-self: end;
  }

  .control-panel {
    position: static;
    max-height: none;
  }

  .electronics-nav {
    display: contents;
  }

  .electronics-nav .panel-section {
    border: 1px solid var(--line);
    background: var(--panel);
    min-width: 0;
  }

  .electronics-nav .panel-section + .panel-section {
    margin-top: 0;
    border-top: 1px solid var(--line);
  }

  .calculator-picker-panel {
    order: 1;
  }

  .electronics-main {
    order: 2;
  }

  .conventions-panel {
    order: 3;
  }

  .formula-panel {
    order: 4;
  }

  .conventions-summary {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .conventions-summary small {
    display: none;
  }

  .calculator-menu-toggle {
    display: inline-flex;
  }

  .calculator-menu-shell {
    display: none;
  }

  .electronics-nav.is-menu-open .calculator-menu-shell {
    display: grid;
  }

  .calc-form-grid,
  .field-grid,
  .solver-toolbar,
  .variable-grid,
  .target-range-grid,
  .result-options {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .brand {
    display: grid;
    gap: 0.55rem;
  }

  .app-logo {
    width: 132px;
  }

  .brand h1 {
    font-size: 1.35rem;
  }

  .brand p {
    display: none;
  }

  .formula-lab-app .tool-nav,
  .formula-lab-app .file-actions {
    grid-template-columns: 1fr;
  }

  .panel-section,
  .formula-panel,
  .calc-panel {
    padding: 0.85rem;
  }

  .calculator-head {
    display: grid;
  }

  .calculator-head > span {
    justify-self: start;
  }

  .calculator-head-tools {
    justify-self: start;
  }

  .calc-form-grid,
  .field-grid,
  .result-grid,
  .solver-toolbar,
  .variable-grid,
  .target-range-grid,
  .result-options {
    grid-template-columns: 1fr;
  }

  .unit-row {
    grid-template-columns: 1fr;
  }

  .metric-card {
    min-height: 108px;
  }
}

@media (max-width: 900px) {
  .electronics-app {
    --bench-bg: #17191d;
    --bench-panel: #202329;
    --bench-panel-soft: #262a31;
    --bench-line: #3a404b;
    --bench-line-strong: #566070;
    --bench-text: #eef2f7;
    --bench-muted: #aeb7c4;
    --bench-muted-2: #7f8998;
    --bench-accent: #29c7b8;
    --bench-accent-strong: #14a596;
    min-height: 100vh;
    background: var(--bench-bg);
    color: var(--bench-text);
  }

  .electronics-app .topbar {
    border-bottom-color: var(--bench-line);
    background: #1b1e23;
    color: var(--bench-text);
  }

  .electronics-app .brand h1 {
    color: var(--bench-text);
    font-weight: 760;
  }

  .electronics-app .brand p {
    color: var(--bench-muted);
  }

  .electronics-app .topbar-actions {
    border-color: var(--bench-line);
    background: rgba(17, 19, 23, 0.98);
  }

  .electronics-app .button,
  .electronics-app .mini-apply {
    border-color: var(--bench-line-strong);
    background: #2d323b;
    color: var(--bench-text);
    font-weight: 560;
  }

  .electronics-app .button-secondary {
    background: transparent;
  }

  .electronics-app .button:hover:not(:disabled),
  .electronics-app .button:focus-visible,
  .electronics-app .mini-apply:hover,
  .electronics-app .mini-apply:focus-visible {
    border-color: #778295;
    background: #353b45;
    outline-color: rgba(41, 199, 184, 0.18);
  }

  .electronics-app .button-primary {
    border-color: var(--bench-accent-strong);
    background: var(--bench-accent-strong);
    color: #051615;
    font-weight: 720;
  }

  .electronics-app .is-active-tool {
    border-color: var(--bench-accent) !important;
    background: rgba(41, 199, 184, 0.18) !important;
    color: var(--bench-text) !important;
  }

  .electronics-app .electronics-workspace {
    width: 100%;
    background: var(--bench-bg);
  }

  .electronics-app .electronics-nav .panel-section,
  .electronics-app .formula-panel,
  .electronics-app .calc-panel {
    border-color: var(--bench-line);
    background: var(--bench-panel);
    color: var(--bench-text);
  }

  .electronics-app .electronics-main {
    background:
      linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
      linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
      #14161a;
    background-size: 32px 32px;
  }

  .electronics-app .section-heading h2,
  .electronics-app .calculator-head h2,
  .electronics-app .conventions-summary span,
  .electronics-app #formulaBody h3,
  .electronics-app .related-link strong,
  .electronics-app .network-branch-head strong,
  .electronics-app .preset-button strong {
    color: var(--bench-text);
  }

  .electronics-app .section-heading span,
  .electronics-app .calculator-head > span,
  .electronics-app .calculator-head-tools span,
  .electronics-app .conventions-summary small {
    border-color: var(--bench-line);
    background: #1d2128;
    color: var(--bench-muted);
    font-weight: 560;
  }

  .electronics-app .conventions-summary::after {
    border-color: var(--bench-muted);
  }

  .electronics-app .field,
  .electronics-app .check-field {
    font-weight: 400;
  }

  .electronics-app .field span,
  .electronics-app .check-field span,
  .electronics-app .reference-mini,
  .electronics-app #filterPlotReadout,
  .electronics-app #timingCurveReadout,
  .electronics-app #formulaBody p,
  .electronics-app #formulaBody li {
    color: var(--bench-muted);
  }

  .electronics-app input,
  .electronics-app select,
  .electronics-app textarea {
    border-color: var(--bench-line);
    background: #191c21;
    color: var(--bench-text);
  }

  .electronics-app input:focus,
  .electronics-app select:focus,
  .electronics-app textarea:focus {
    border-color: var(--bench-accent);
    box-shadow: 0 0 0 3px rgba(41, 199, 184, 0.12);
    outline: none;
  }

  .electronics-app input[type="checkbox"] {
    accent-color: var(--bench-accent);
  }

  .electronics-app .calc-nav {
    border-color: var(--bench-line);
    background: #191c21;
    color: var(--bench-muted);
    font-weight: 560;
  }

  .electronics-app .calc-nav:hover,
  .electronics-app .calc-nav:focus-visible {
    border-color: var(--bench-line-strong);
    background: #23272f;
    color: var(--bench-text);
    outline: none;
  }

  .electronics-app .calc-nav.is-active {
    border-color: var(--bench-accent);
    border-left-color: var(--bench-accent);
    background: rgba(41, 199, 184, 0.14);
    color: var(--bench-text);
  }

  .electronics-app .metric-card {
    border-color: var(--bench-line);
    background: rgba(32, 35, 41, 0.92);
    color: var(--bench-text);
  }

  .electronics-app .metric-card span {
    color: var(--bench-muted);
    font-weight: 650;
  }

  .electronics-app .metric-card small {
    color: var(--bench-muted-2);
  }

  .electronics-app .network-branch,
  .electronics-app .plot-panel,
  .electronics-app .preset-button,
  .electronics-app .related-link,
  .electronics-app .result-table {
    border-color: var(--bench-line);
    background: rgba(29, 33, 40, 0.86);
    color: var(--bench-text);
  }

  .electronics-app .result-table th {
    background: var(--bench-panel-soft);
    color: var(--bench-muted);
  }

  .electronics-app .result-table td,
  .electronics-app .result-table th {
    border-bottom-color: var(--bench-line);
  }

  .electronics-app .preset-button {
    border-left-color: var(--bench-accent);
  }

  .electronics-app .related-link {
    border-left-color: #2667ff;
  }

  .electronics-app .related-link.is-reference {
    border-left-color: #d98d18;
  }

  .electronics-app .preset-button span,
  .electronics-app .related-link span,
  .electronics-app .related-link p {
    color: var(--bench-muted);
  }

  .electronics-app .circuit-diagram,
  .electronics-app #filterPlotCanvas,
  .electronics-app #timingCurveCanvas {
    border-color: var(--bench-line);
    background: #171a1f;
  }

  .electronics-app .sanity-panel {
    border-color: var(--bench-line);
  }

  .electronics-app .warning-card {
    border-color: rgba(244, 201, 93, 0.28);
    background: rgba(244, 201, 93, 0.08);
  }

  .electronics-app .warning-card strong {
    color: #f4c95d;
  }

  .electronics-app .warning-card p {
    color: var(--bench-muted);
  }
}

.electronics-app[data-theme] {
  --bench-bg: #17191d;
  --bench-panel: #202329;
  --bench-panel-soft: #262a31;
  --bench-line: #3a404b;
  --bench-line-strong: #566070;
  --bench-text: #eef2f7;
  --bench-muted: #aeb7c4;
  --bench-muted-2: #7f8998;
  --bench-accent: #29c7b8;
  --bench-accent-strong: #14a596;
  --bench-topbar: #1b1e23;
  --bench-surface: #14161a;
  --bench-grid-line: rgba(255, 255, 255, 0.025);
  --bench-menu: rgba(17, 19, 23, 0.98);
  --bench-button: #2d323b;
  --bench-button-hover: #353b45;
  --bench-input: #191c21;
  --bench-chip: #1d2128;
  --bench-card: rgba(32, 35, 41, 0.92);
  --bench-card-soft: rgba(29, 33, 40, 0.86);
  --bench-plot: #171a1f;
  --bench-active: rgba(41, 199, 184, 0.14);
  --bench-focus: rgba(41, 199, 184, 0.18);
  --bench-warning-bg: rgba(244, 201, 93, 0.08);
  --bench-warning-text: #f4c95d;
  --bench-shadow: rgba(0, 0, 0, 0.32);
  background: var(--bench-bg);
  color: var(--bench-text);
}

:root[data-electronics-theme="light"] .electronics-app,
.electronics-app[data-theme="light"] {
  --bench-bg: #f6f3ea;
  --bench-panel: #fffdf8;
  --bench-panel-soft: #ebe7dc;
  --bench-line: rgba(22, 24, 29, 0.16);
  --bench-line-strong: rgba(22, 24, 29, 0.32);
  --bench-text: #16181d;
  --bench-muted: #626977;
  --bench-muted-2: #858b96;
  --bench-accent: #168f84;
  --bench-accent-strong: #20a397;
  --bench-topbar: #fffdf8;
  --bench-surface: #f3efe5;
  --bench-grid-line: rgba(22, 24, 29, 0.055);
  --bench-menu: rgba(255, 253, 248, 0.98);
  --bench-button: #fffdf8;
  --bench-button-hover: #ebe7dc;
  --bench-input: #fffaf1;
  --bench-chip: #f0ece1;
  --bench-card: #fffdf8;
  --bench-card-soft: #fbf7ee;
  --bench-plot: #fffaf1;
  --bench-active: rgba(32, 163, 151, 0.14);
  --bench-focus: rgba(32, 163, 151, 0.18);
  --bench-warning-bg: rgba(217, 141, 24, 0.1);
  --bench-warning-text: #8b570d;
  --bench-shadow: rgba(22, 24, 29, 0.15);
}

.electronics-app[data-theme] .topbar {
  border-bottom-color: var(--bench-line);
  background: var(--bench-topbar);
  color: var(--bench-text);
}

.electronics-app[data-theme] .brand h1,
.electronics-app[data-theme] .section-heading h2,
.electronics-app[data-theme] .calculator-head h2,
.electronics-app[data-theme] .conventions-summary span,
.electronics-app[data-theme] #formulaBody h3,
.electronics-app[data-theme] .related-link strong,
.electronics-app[data-theme] .network-branch-head strong,
.electronics-app[data-theme] .preset-button strong {
  color: var(--bench-text);
}

.electronics-app[data-theme] .brand p,
.electronics-app[data-theme] .field span,
.electronics-app[data-theme] .check-field span,
.electronics-app[data-theme] .reference-mini,
.electronics-app[data-theme] #filterPlotReadout,
.electronics-app[data-theme] #timingCurveReadout,
.electronics-app[data-theme] #formulaBody p,
.electronics-app[data-theme] #formulaBody li,
.electronics-app[data-theme] .preset-button span,
.electronics-app[data-theme] .related-link span,
.electronics-app[data-theme] .related-link p {
  color: var(--bench-muted);
}

.electronics-app[data-theme] .app-menu-toggle,
.electronics-app[data-theme] .button,
.electronics-app[data-theme] .mini-apply {
  border-color: var(--bench-line-strong);
  background: var(--bench-button);
  color: var(--bench-text);
}

.electronics-app[data-theme] .button-secondary {
  background: transparent;
}

.electronics-app[data-theme] .app-menu-toggle:hover,
.electronics-app[data-theme] .app-menu-toggle:focus-visible,
.electronics-app[data-theme] .button:hover:not(:disabled),
.electronics-app[data-theme] .button:focus-visible,
.electronics-app[data-theme] .mini-apply:hover,
.electronics-app[data-theme] .mini-apply:focus-visible {
  border-color: var(--bench-accent);
  background: var(--bench-button-hover);
  outline-color: var(--bench-focus);
}

.electronics-app[data-theme] .button-primary {
  border-color: var(--bench-accent-strong);
  background: var(--bench-accent-strong);
  color: #051615;
}

.electronics-app[data-theme] .is-active-tool {
  border-color: var(--bench-accent) !important;
  background: var(--bench-active) !important;
  color: var(--bench-text) !important;
}

.theme-toggle {
  gap: 0.45rem;
}

.theme-toggle-mark {
  position: relative;
  width: 0.78rem;
  height: 0.78rem;
  flex: 0 0 auto;
  border-radius: 999px;
  background: #f4c95d;
  box-shadow: inset -0.24rem -0.16rem 0 #2d323b;
}

.electronics-app[data-theme="light"] .theme-toggle-mark,
:root[data-electronics-theme="light"] .electronics-app .theme-toggle-mark {
  background: var(--bench-accent);
  box-shadow:
    0 0 0 0.16rem rgba(22, 143, 132, 0.16),
    0 0 0 0.32rem rgba(22, 143, 132, 0.08);
}

.electronics-app[data-theme] .file-actions {
  border-left-color: var(--bench-line);
}

.electronics-app[data-theme] .topbar-actions,
.electronics-app[data-theme] .export-menu {
  border-color: var(--bench-line);
  background: var(--bench-menu);
  color: var(--bench-text);
  box-shadow: 0 18px 44px var(--bench-shadow);
}

.electronics-app[data-theme] .export-menu button {
  color: var(--bench-muted);
}

.electronics-app[data-theme] .export-menu button:hover,
.electronics-app[data-theme] .export-menu button:focus-visible {
  border-color: var(--bench-line);
  background: var(--bench-button-hover);
  color: var(--bench-text);
}

.electronics-app[data-theme] .electronics-workspace {
  background: var(--bench-bg);
}

.electronics-app[data-theme] .control-panel,
.electronics-app[data-theme] .electronics-nav .panel-section,
.electronics-app[data-theme] .formula-panel {
  border-color: var(--bench-line);
  background: var(--bench-panel);
  color: var(--bench-text);
}

.electronics-app[data-theme] .calc-panel {
  border: 0;
  background: transparent;
  color: var(--bench-text);
  padding: 0;
}

.electronics-app[data-theme] .calc-panel.is-active {
  display: grid;
  gap: 18px;
}

.electronics-app[data-theme] .control-panel {
  border-right-color: var(--bench-line);
}

.electronics-app[data-theme] .formula-panel {
  border-left-color: var(--bench-line);
}

.electronics-app[data-theme] .panel-section {
  border-color: var(--bench-line);
}

.electronics-app[data-theme] .electronics-main {
  background:
    linear-gradient(90deg, var(--bench-grid-line) 1px, transparent 1px),
    linear-gradient(var(--bench-grid-line) 1px, transparent 1px),
    var(--bench-surface);
  background-size: 32px 32px;
}

.electronics-app[data-theme] .section-heading span,
.electronics-app[data-theme] .calculator-head > span,
.electronics-app[data-theme] .calculator-head-tools span,
.electronics-app[data-theme] .conventions-summary small {
  border-color: var(--bench-line);
  background: var(--bench-chip);
  color: var(--bench-muted);
}

.electronics-app[data-theme] .conventions-summary::after {
  border-color: var(--bench-muted);
}

.electronics-app[data-theme] input,
.electronics-app[data-theme] select,
.electronics-app[data-theme] textarea {
  border-color: var(--bench-line);
  background: var(--bench-input);
  color: var(--bench-text);
}

.electronics-app[data-theme] input:focus,
.electronics-app[data-theme] select:focus,
.electronics-app[data-theme] textarea:focus {
  border-color: var(--bench-accent);
  box-shadow: 0 0 0 3px var(--bench-focus);
  outline: none;
}

.electronics-app[data-theme] input[type="checkbox"] {
  accent-color: var(--bench-accent);
}

.electronics-app[data-theme] .calc-nav {
  border-color: var(--bench-line);
  background: var(--bench-input);
  color: var(--bench-muted);
}

.electronics-app[data-theme] .calc-nav:hover,
.electronics-app[data-theme] .calc-nav:focus-visible {
  border-color: var(--bench-line-strong);
  background: var(--bench-button-hover);
  color: var(--bench-text);
}

.electronics-app[data-theme] .calc-nav.is-active {
  border-color: var(--bench-accent);
  background: var(--bench-active);
  color: var(--bench-text);
}

.electronics-app[data-theme] .calculator-head {
  border-bottom-color: var(--bench-line);
}

.electronics-app[data-theme] .calculator-head p {
  color: var(--bench-muted);
}

.electronics-app[data-theme] .metric-card {
  border-color: var(--bench-line);
  background: var(--bench-card);
  color: var(--bench-text);
}

.electronics-app[data-theme] .metric-card span {
  color: var(--bench-muted);
}

.electronics-app[data-theme] .metric-card small {
  color: var(--bench-muted-2);
}

.electronics-app[data-theme] .network-branch,
.electronics-app[data-theme] .plot-panel,
.electronics-app[data-theme] .preset-button,
.electronics-app[data-theme] .related-link,
.electronics-app[data-theme] .result-table {
  border-color: var(--bench-line);
  background: var(--bench-card-soft);
  color: var(--bench-text);
}

.electronics-app[data-theme] .result-table th {
  background: var(--bench-panel-soft);
  color: var(--bench-muted);
}

.electronics-app[data-theme] .result-table th,
.electronics-app[data-theme] .result-table td {
  border-bottom-color: var(--bench-line);
}

.electronics-app[data-theme] .preset-button {
  border-left-color: var(--bench-accent);
}

.electronics-app[data-theme] .related-link {
  border-left-color: #2667ff;
}

.electronics-app[data-theme] .related-link.is-reference {
  border-left-color: #d98d18;
}

.electronics-app[data-theme] .circuit-diagram,
.electronics-app[data-theme] #filterPlotCanvas,
.electronics-app[data-theme] #timingCurveCanvas {
  border-color: var(--bench-line);
  background: var(--bench-plot);
}

.electronics-app[data-theme] .sanity-panel {
  border-color: var(--bench-line);
}

.electronics-app[data-theme] .warning-card {
  border-color: rgba(217, 141, 24, 0.35);
  background: var(--bench-warning-bg);
}

.electronics-app[data-theme] .warning-card strong {
  color: var(--bench-warning-text);
}

.electronics-app[data-theme] .warning-card p {
  color: var(--bench-muted);
}

.formula-lab-app[data-theme] {
  --bench-bg: #17191d;
  --bench-panel: #202329;
  --bench-panel-soft: #262a31;
  --bench-line: #3a404b;
  --bench-line-strong: #566070;
  --bench-text: #eef2f7;
  --bench-muted: #aeb7c4;
  --bench-muted-2: #7f8998;
  --bench-accent: #29c7b8;
  --bench-accent-strong: #14a596;
  --bench-topbar: #1b1e23;
  --bench-surface: #14161a;
  --bench-grid-line: rgba(255, 255, 255, 0.025);
  --bench-menu: rgba(17, 19, 23, 0.98);
  --bench-button: #2d323b;
  --bench-button-hover: #353b45;
  --bench-input: #191c21;
  --bench-chip: #1d2128;
  --bench-card: rgba(32, 35, 41, 0.92);
  --bench-card-soft: rgba(29, 33, 40, 0.86);
  --bench-active: rgba(41, 199, 184, 0.14);
  --bench-focus: rgba(41, 199, 184, 0.18);
  --bench-note: rgba(38, 103, 255, 0.1);
  --bench-warning-bg: rgba(244, 201, 93, 0.08);
  --bench-warning-text: #f4c95d;
  --bench-shadow: rgba(0, 0, 0, 0.32);
  background: var(--bench-bg);
  color: var(--bench-text);
}

:root[data-electronics-theme="light"] .formula-lab-app,
.formula-lab-app[data-theme="light"] {
  --bench-bg: #f6f3ea;
  --bench-panel: #fffdf8;
  --bench-panel-soft: #ebe7dc;
  --bench-line: rgba(22, 24, 29, 0.16);
  --bench-line-strong: rgba(22, 24, 29, 0.32);
  --bench-text: #16181d;
  --bench-muted: #626977;
  --bench-muted-2: #858b96;
  --bench-accent: #168f84;
  --bench-accent-strong: #20a397;
  --bench-topbar: #fffdf8;
  --bench-surface: #f3efe5;
  --bench-grid-line: rgba(22, 24, 29, 0.055);
  --bench-menu: rgba(255, 253, 248, 0.98);
  --bench-button: #fffdf8;
  --bench-button-hover: #ebe7dc;
  --bench-input: #fffaf1;
  --bench-chip: #f0ece1;
  --bench-card: #fffdf8;
  --bench-card-soft: #fbf7ee;
  --bench-active: rgba(32, 163, 151, 0.14);
  --bench-focus: rgba(32, 163, 151, 0.18);
  --bench-note: rgba(38, 103, 255, 0.07);
  --bench-warning-bg: rgba(217, 141, 24, 0.1);
  --bench-warning-text: #8b570d;
  --bench-shadow: rgba(22, 24, 29, 0.15);
}

@media (min-width: 901px) {
  .formula-lab-app[data-theme] {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    height: 100vh;
    min-height: 0;
    overflow: hidden;
  }

  .formula-lab-app[data-theme] .topbar {
    position: relative;
    top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 76px;
    padding: 14px 18px;
    backdrop-filter: none;
  }

  .formula-lab-app[data-theme] .brand {
    gap: 12px;
  }

  .formula-lab-app[data-theme] .app-logo {
    width: 154px;
    min-height: 42px;
    padding: 0.35rem 0.5rem;
  }

  .formula-lab-app[data-theme] .brand h1 {
    font-size: 18px;
    font-weight: 760;
    line-height: 1.1;
  }

  .formula-lab-app[data-theme] .brand p {
    max-width: min(52vw, 620px);
    margin-top: 2px;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .formula-lab-app[data-theme] .topbar-actions,
  .formula-lab-app[data-theme] .tool-nav,
  .formula-lab-app[data-theme] .file-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    max-width: none;
  }

  .formula-lab-app[data-theme] .topbar-actions {
    width: auto;
    justify-content: flex-end;
    justify-items: initial;
  }

  .formula-lab-app[data-theme] .tool-nav {
    gap: 6px;
  }

  .formula-lab-app[data-theme] .file-actions {
    justify-content: flex-end;
    margin-left: 4px;
    padding-left: 12px;
    border-left: 1px solid var(--bench-line);
  }

  .formula-lab-app[data-theme] .button {
    min-height: 36px;
    border-radius: 8px;
    padding: 0 13px;
    font-size: 13px;
    font-weight: 560;
    transition: border-color 140ms ease, background 140ms ease, transform 140ms ease;
  }

  .formula-lab-app[data-theme] .tool-nav .button {
    min-height: 30px;
    padding: 0 9px;
    font-size: 12px;
  }

  .formula-lab-app[data-theme] .file-actions .button {
    min-height: 34px;
  }

  .formula-lab-app[data-theme] .formula-lab-workspace {
    grid-template-columns: minmax(250px, 320px) minmax(0, 1fr) minmax(300px, 360px);
    gap: 0;
    width: 100%;
    max-width: none;
    min-height: 0;
    margin: 0;
    padding: 0;
    align-items: stretch;
  }

  .formula-lab-app.is-library-collapsed[data-theme] .formula-lab-workspace {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
  }

  .formula-lab-app[data-theme] .formula-library,
  .formula-lab-app[data-theme] .formula-lab-notes,
  .formula-lab-app[data-theme] .formula-solver-panel {
    min-height: 0;
    overflow: auto;
  }

  .formula-lab-app[data-theme] .formula-library,
  .formula-lab-app[data-theme] .formula-lab-notes {
    position: static;
    top: auto;
    max-height: none;
  }

  .formula-lab-app[data-theme] .formula-library {
    border-right: 1px solid var(--bench-line);
    padding: 16px;
  }

  .formula-lab-app[data-theme] .formula-lab-notes {
    border-left: 1px solid var(--bench-line);
    padding: 16px;
  }

  .formula-lab-app[data-theme] .formula-solver-panel {
    padding: 18px;
  }

  .formula-lab-app[data-theme] .panel-section {
    margin: 0 0 18px;
    padding: 0 0 18px;
    border-bottom: 1px solid var(--bench-line);
  }

  .formula-lab-app[data-theme] .panel-section + .panel-section {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }

  .formula-lab-app[data-theme] .panel-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: 0;
  }
}

.formula-lab-app[data-theme] .topbar {
  border-bottom-color: var(--bench-line);
  background: var(--bench-topbar);
  color: var(--bench-text);
}

.formula-lab-app[data-theme] .brand h1,
.formula-lab-app[data-theme] .section-heading h2,
.formula-lab-app[data-theme] .calculator-head h2,
.formula-lab-app[data-theme] .working-summary span,
.formula-lab-app[data-theme] .active-formula-card strong,
.formula-lab-app[data-theme] .formula-example-button strong,
.formula-lab-app[data-theme] .working-list strong,
.formula-lab-app[data-theme] .related-link strong,
.formula-lab-app[data-theme] .formula-help-panel code {
  color: var(--bench-text);
}

.formula-lab-app[data-theme] .brand p,
.formula-lab-app[data-theme] .field span,
.formula-lab-app[data-theme] .check-field span,
.formula-lab-app[data-theme] .formula-example-button span,
.formula-lab-app[data-theme] .formula-example-button code,
.formula-lab-app[data-theme] .active-formula-card span,
.formula-lab-app[data-theme] .active-formula-card code,
.formula-lab-app[data-theme] .formula-help-panel p,
.formula-lab-app[data-theme] .formula-help-panel ul,
.formula-lab-app[data-theme] .variable-name,
.formula-lab-app[data-theme] .working-list code,
.formula-lab-app[data-theme] .related-link span,
.formula-lab-app[data-theme] .related-link p,
.formula-lab-app[data-theme] .formula-empty-state,
.formula-lab-app[data-theme] .formula-note,
.formula-lab-app[data-theme] .formula-library-empty {
  color: var(--bench-muted);
}

.formula-lab-app[data-theme] .app-menu-toggle,
.formula-lab-app[data-theme] .button,
.formula-lab-app[data-theme] .help-toggle,
.formula-lab-app[data-theme] .symbol-button {
  border-color: var(--bench-line-strong);
  background: var(--bench-button);
  color: var(--bench-text);
  font-weight: 560;
}

.formula-lab-app[data-theme] .button-secondary {
  background: transparent;
}

.formula-lab-app[data-theme] .button-primary {
  border-color: var(--bench-accent-strong);
  background: var(--bench-accent-strong);
  color: #051615;
  font-weight: 720;
}

.formula-lab-app[data-theme] .app-menu-toggle:hover,
.formula-lab-app[data-theme] .app-menu-toggle:focus-visible,
.formula-lab-app[data-theme] .button:hover:not(:disabled),
.formula-lab-app[data-theme] .button:focus-visible,
.formula-lab-app[data-theme] .help-toggle:hover,
.formula-lab-app[data-theme] .help-toggle:focus-visible,
.formula-lab-app[data-theme] .help-toggle[aria-expanded="true"],
.formula-lab-app[data-theme] .symbol-button:hover,
.formula-lab-app[data-theme] .symbol-button:focus-visible {
  border-color: var(--bench-accent);
  background: var(--bench-button-hover);
  outline-color: var(--bench-focus);
}

.formula-lab-app[data-theme] .is-active-tool {
  border-color: var(--bench-accent) !important;
  background: var(--bench-active) !important;
  color: var(--bench-text) !important;
}

.formula-lab-app[data-theme="light"] .theme-toggle-mark,
:root[data-electronics-theme="light"] .formula-lab-app .theme-toggle-mark {
  background: var(--bench-accent);
  box-shadow:
    0 0 0 0.16rem rgba(22, 143, 132, 0.16),
    0 0 0 0.32rem rgba(22, 143, 132, 0.08);
}

.formula-lab-app[data-theme] .file-actions,
.formula-lab-app[data-theme] .panel-section,
.formula-lab-app[data-theme] .section-subheading,
.formula-lab-app[data-theme] .calculator-head {
  border-color: var(--bench-line);
}

.formula-lab-app[data-theme] .topbar-actions {
  border-color: var(--bench-line);
  background: var(--bench-menu);
  color: var(--bench-text);
  box-shadow: 0 18px 44px var(--bench-shadow);
}

.formula-lab-app[data-theme] .formula-lab-workspace {
  background: var(--bench-bg);
}

.formula-lab-app[data-theme] .formula-library,
.formula-lab-app[data-theme] .formula-lab-notes {
  border-color: var(--bench-line);
  background: var(--bench-panel);
  color: var(--bench-text);
}

.formula-lab-app[data-theme] .formula-solver-panel {
  border: 0;
  background:
    linear-gradient(90deg, var(--bench-grid-line) 1px, transparent 1px),
    linear-gradient(var(--bench-grid-line) 1px, transparent 1px),
    var(--bench-surface);
  background-size: 32px 32px;
  color: var(--bench-text);
}

.formula-lab-app[data-theme] .section-heading span,
.formula-lab-app[data-theme] .calculator-head > span,
.formula-lab-app[data-theme] .calculator-head-tools span,
.formula-lab-app[data-theme] .working-summary small {
  border-color: var(--bench-line);
  background: var(--bench-chip);
  color: var(--bench-muted);
  font-weight: 560;
}

.formula-lab-app[data-theme] .working-summary::after {
  border-color: var(--bench-muted);
}

.formula-lab-app[data-theme] input,
.formula-lab-app[data-theme] select,
.formula-lab-app[data-theme] textarea {
  border-color: var(--bench-line);
  background: var(--bench-input);
  color: var(--bench-text);
}

.formula-lab-app[data-theme] input:focus,
.formula-lab-app[data-theme] select:focus,
.formula-lab-app[data-theme] textarea:focus {
  border-color: var(--bench-accent);
  box-shadow: 0 0 0 3px var(--bench-focus);
  outline: none;
}

.formula-lab-app[data-theme] .category-chip,
.formula-lab-app[data-theme] .formula-example-button,
.formula-lab-app[data-theme] .variable-card,
.formula-lab-app[data-theme] .working-list li,
.formula-lab-app[data-theme] .metric-card,
.formula-lab-app[data-theme] .related-link,
.formula-lab-app[data-theme] .formula-empty-state,
.formula-lab-app[data-theme] .formula-note,
.formula-lab-app[data-theme] .formula-library-empty,
.formula-lab-app[data-theme] .active-formula-card,
.formula-lab-app[data-theme] .formula-help-panel,
.formula-lab-app[data-theme] .formula-pad {
  border-color: var(--bench-line);
  background: var(--bench-card-soft);
  color: var(--bench-text);
}

.formula-lab-app[data-theme] .category-chip:hover,
.formula-lab-app[data-theme] .category-chip:focus-visible,
.formula-lab-app[data-theme] .formula-example-button:hover,
.formula-lab-app[data-theme] .formula-example-button:focus-visible {
  border-color: var(--bench-line-strong);
  background: var(--bench-button-hover);
  color: var(--bench-text);
  outline: none;
}

.formula-lab-app[data-theme] .category-chip.is-active,
.formula-lab-app[data-theme] .formula-example-button.is-active {
  border-color: var(--bench-accent);
  background: var(--bench-active);
  color: var(--bench-text);
}

.formula-lab-app[data-theme] .active-formula-card,
.formula-lab-app[data-theme] .formula-help-panel,
.formula-lab-app[data-theme] .related-link {
  border-left-color: #2667ff;
}

.formula-lab-app[data-theme] .active-formula-card.is-custom {
  border-left-color: #d98d18;
  background: var(--bench-warning-bg);
}

.formula-lab-app[data-theme] .working-list li,
.formula-lab-app[data-theme] .formula-example-button.is-recent {
  border-left-color: var(--bench-accent);
}

.formula-lab-app[data-theme] .metric-card {
  background: var(--bench-card);
}

.formula-lab-app[data-theme] .metric-card span {
  color: var(--bench-muted);
  font-weight: 650;
}

.formula-lab-app[data-theme] .metric-card small {
  color: var(--bench-muted-2);
}

.formula-lab-app[data-theme] .formula-library-backdrop {
  background: rgba(17, 18, 24, 0.5);
}

.formula-lab-app[data-theme] #solverStatus[data-tone="success"] {
  border-color: rgba(41, 199, 184, 0.45);
  background: var(--bench-active);
  color: var(--bench-accent);
}

.formula-lab-app[data-theme] #solverStatus[data-tone="warning"],
.formula-lab-app[data-theme] #solverStatus[data-tone="error"] {
  border-color: rgba(217, 141, 24, 0.4);
  background: var(--bench-warning-bg);
  color: var(--bench-warning-text);
}

@media print {
  .topbar,
  .control-panel,
  .toast {
    display: none !important;
  }

  body {
    background: white;
  }

  .electronics-workspace,
  .formula-lab-workspace {
    display: block;
    width: 100%;
    padding: 0;
  }

  .formula-panel,
  .calc-panel {
    border: 0;
  }
}