:root {
  --font-body: system-ui, -apple-system, Segoe UI, Roboto, Helvetica Neue, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
  --font-scale: 1;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --transition-fast: 120ms ease;
  --transition-base: 180ms cubic-bezier(0.2, 0.6, 0.2, 1);
  --focus-ring: 0 0 0 3px var(--color-accent-soft), 0 0 0 1.5px var(--color-accent);
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.10);
  --cursor-scale: 1;
}

:root,
[data-color-scheme=light] {
  --color-bg: #ffffff;
  --color-bg-inset: #f6f8fa;
  --color-surface: #ffffff;
  --color-surface-hover: #f3f4f6;
  --color-border: #d9dee3;
  --color-border-strong: #b9c1c9;
  --color-text: #1b1f24;
  --color-text-muted: #57606a;
  --color-code-bg: #f6f8fa;
  --color-overlay: rgba(27, 31, 36, 0.45);
}

[data-color-scheme=dark] {
  --color-bg: #0d1117;
  --color-bg-inset: #10161d;
  --color-surface: #151b23;
  --color-surface-hover: #1c232c;
  --color-border: #2d3541;
  --color-border-strong: #3d4653;
  --color-text: #e6edf3;
  --color-text-muted: #9aa4b2;
  --color-code-bg: #10161d;
  --color-overlay: rgba(1, 4, 9, 0.6);
}

:root,
[data-accent=indigo] {
  --color-accent: #4f5bd5;
  --color-accent-hover: #3e49b8;
  --color-accent-soft: rgba(79, 91, 213, 0.14);
  --color-accent-contrast: #ffffff;
}

[data-accent=red] {
  --color-accent: #d1373f;
  --color-accent-hover: #b02a31;
  --color-accent-soft: rgba(209, 55, 63, 0.14);
  --color-accent-contrast: #ffffff;
}

[data-accent=orange] {
  --color-accent: #c2650a;
  --color-accent-hover: #a4550a;
  --color-accent-soft: rgba(194, 101, 10, 0.16);
  --color-accent-contrast: #ffffff;
}

[data-accent=lime] {
  --color-accent: #5b8a11;
  --color-accent-hover: #4a7209;
  --color-accent-soft: rgba(91, 138, 17, 0.16);
  --color-accent-contrast: #0d1117;
}

[data-accent=green] {
  --color-accent: #1a7f5a;
  --color-accent-hover: #146349;
  --color-accent-soft: rgba(26, 127, 90, 0.15);
  --color-accent-contrast: #ffffff;
}

[data-accent=blue] {
  --color-accent: #0969da;
  --color-accent-hover: #0757ba;
  --color-accent-soft: rgba(9, 105, 218, 0.14);
  --color-accent-contrast: #ffffff;
}

[data-accent=aqua] {
  --color-accent: #0f8b8d;
  --color-accent-hover: #0c6e70;
  --color-accent-soft: rgba(15, 139, 141, 0.15);
  --color-accent-contrast: #ffffff;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: calc(16px * var(--font-scale));
  -webkit-text-size-adjust: 100%;
}
@media (max-width: 480px) {
  html {
    font-size: calc(14.5px * var(--font-scale));
  }
}
@media (max-width: 360px) {
  html {
    font-size: calc(13.5px * var(--font-scale));
  }
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
  transition: background var(--transition-base), color var(--transition-base);
}

body.cursor-big {
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 24 24'%3E%3Cpath d='M4 2l14 8-6 2 4 6-3 2-4-6-4 4z' fill='%23000' stroke='%23fff'/%3E%3C/svg%3E") 4 4, auto;
}

.a11y-reading-ruler {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  height: 40px;
  margin-top: -20px;
  background: rgba(255, 220, 60, 0.28);
  border-top: 2px solid rgba(180, 140, 0, 0.6);
  border-bottom: 2px solid rgba(180, 140, 0, 0.6);
  z-index: 498;
  pointer-events: none;
}

.a11y-reading-mask {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 497;
  pointer-events: none;
}
.a11y-reading-mask--top {
  top: 0;
}
.a11y-reading-mask--bottom {
  bottom: 0;
}

body.highlight-links a {
  background: rgba(255, 220, 60, 0.35) !important;
  text-decoration: underline !important;
  text-decoration-thickness: 2px !important;
  border-radius: 2px;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
}
a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

button {
  font-family: inherit;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-3);
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 var(--space-4);
  color: var(--color-text);
}

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

pre {
  margin: 0;
  overflow-x: auto;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-6) 0;
}

::selection {
  background: var(--color-accent-soft);
  color: var(--color-text);
}

.skip-link {
  position: absolute;
  top: -48px;
  left: var(--space-3);
  z-index: 1000;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: var(--space-3);
}

.container {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}
@media (min-width: 900px) {
  .container {
    padding-inline: var(--space-6);
  }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.section {
  padding-block: var(--space-7);
}
@media (min-width: 900px) {
  .section {
    padding-block: var(--space-8);
  }
}

.section--tight {
  padding-block: var(--space-6);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

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

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  font-size: 0.9375rem;
  font-weight: 550;
  line-height: 1.2;
  cursor: pointer;
  max-width: 100%;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}
@media (max-width: 400px) {
  .btn {
    white-space: normal;
    text-align: center;
  }
}
.btn:active {
  transform: translateY(1px);
}
.btn svg {
  width: 1em;
  height: 1em;
  flex-shrink: 0;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  color: var(--color-accent-contrast);
  text-decoration: none;
}

.btn--secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn--secondary:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
  text-decoration: none;
  border-color: var(--color-border-strong);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
}
.btn--ghost:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
  text-decoration: none;
}

.btn--sm {
  padding: var(--space-1) var(--space-3);
  font-size: 0.8125rem;
}

.btn--icon {
  padding: var(--space-2);
  aspect-ratio: 1;
}

.btn--copied {
  background: var(--color-accent) !important;
  color: var(--color-accent-contrast) !important;
  border-color: var(--color-accent) !important;
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.field__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.field__hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.field__error {
  font-size: 0.8125rem;
  color: var(--color-error, #d1373f);
  display: none;
}

.field.has-error .field__error {
  display: block;
}

.field.has-error .input {
  border-color: var(--color-error, #d1373f);
}

.input:focus-visible,
.select:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.input,
.select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}
.input:hover,
.select:hover {
  border-color: var(--color-border-strong);
}

.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%2357606a' d='M4 6l4 4 4-4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  padding-right: var(--space-6);
}

.interval-row {
  display: flex;
  gap: var(--space-2);
}
.interval-row .input {
  flex: 1 1 auto;
  min-width: 0;
}
.interval-row .select {
  flex: 0 0 auto;
  width: auto;
  min-width: 4.5rem;
}
.interval-row .btn {
  flex: 0 0 auto;
}
@media (max-width: 380px) {
  .interval-row {
    flex-wrap: wrap;
  }
  .interval-row .input,
  .interval-row .select,
  .interval-row .btn {
    flex: 1 1 100%;
  }
}

.field__checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.9375rem;
  color: var(--color-text);
  cursor: pointer;
}
.field__checkbox-label input[type=checkbox] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-accent);
  flex-shrink: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0.15em 0.6em;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  height: 64px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: saturate(1.2) blur(6px);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text);
}
.navbar__brand:hover {
  text-decoration: none;
  color: var(--color-text);
}

.navbar__logo {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.navbar__nav {
  display: none;
  align-items: center;
  gap: var(--space-5);
}
@media (min-width: 900px) {
  .navbar__nav {
    display: flex;
  }
}

.navbar__link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.navbar__link {
  font-size: 0.9375rem;
  font-weight: 550;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  padding: var(--space-1) var(--space-1);
}
.navbar__link:hover {
  color: var(--color-text);
  text-decoration: none;
}
.navbar__link.is-active {
  color: var(--color-accent);
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.navbar__actions > .btn {
  display: none;
}
@media (min-width: 900px) {
  .navbar__actions > .btn {
    display: inline-flex;
  }
}

.navbar__menu-toggle:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.navbar__menu-toggle {
  display: inline-flex;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  color: var(--color-text);
  cursor: pointer;
}
@media (min-width: 900px) {
  .navbar__menu-toggle {
    display: none;
  }
}

.navbar__mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) 0 var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.navbar__mobile-nav[hidden] {
  display: none;
}
@media (min-width: 900px) {
  .navbar__mobile-nav {
    display: none !important;
  }
}
.navbar__mobile-nav .navbar__link {
  padding: var(--space-2) var(--space-1);
}

.hero {
  position: relative;
  padding-block: var(--space-7) var(--space-6);
  overflow: hidden;
}
@media (min-width: 900px) {
  .hero {
    padding-block: var(--space-8) var(--space-7);
  }
}

.hero__trace {
  position: absolute;
  top: -40px;
  right: -60px;
  width: 420px;
  height: 420px;
  opacity: 0.5;
  pointer-events: none;
  color: var(--color-border-strong);
}
@media (prefers-reduced-motion: no-preference) {
  .hero__trace {
    transition: opacity var(--transition-base);
  }
}
@media (max-width: 900px) {
  .hero__trace {
    width: 260px;
    height: 260px;
    opacity: 0.35;
  }
}
@media (max-width: 600px) {
  .hero__trace {
    width: 160px;
    height: 160px;
    opacity: 0.25;
    top: -20px;
    right: -40px;
  }
}

.hero__content {
  position: relative;
  max-width: 640px;
}

.hero__eyebrow {
  margin-bottom: var(--space-4);
}

.hero__title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: var(--space-4);
}

.hero__lede {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-bottom: var(--space-6);
}

.hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.search {
  position: relative;
  max-width: 480px;
}

.search__icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.search__input:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.search__input {
  width: 100%;
  padding: var(--space-3) var(--space-4) var(--space-3) 2.5rem;
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
}
.search__input::placeholder {
  color: var(--color-text-muted);
}
.search__input:hover {
  border-color: var(--color-border-strong);
}

.search__meta {
  margin-top: var(--space-2);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
@media (min-width: 600px) {
  .tool-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1200px) {
  .tool-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.tool-grid__empty {
  display: none;
  padding: var(--space-7) var(--space-4);
  text-align: center;
  color: var(--color-text-muted);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
}
.tool-grid__empty.is-visible {
  display: block;
}

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.tool-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--space-5);
  right: var(--space-5);
  height: 3px;
  background: repeating-linear-gradient(to right, var(--color-accent) 0, var(--color-accent) 6px, transparent 6px, transparent 12px);
  opacity: 0.55;
  border-radius: 0 0 2px 2px;
}
.tool-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.tool-card[hidden] {
  display: none;
}

.tool-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-accent);
}
.tool-card__icon svg {
  width: 22px;
  height: 22px;
}

.tool-card__title {
  font-size: 1.0625rem;
  margin-bottom: var(--space-2);
}

.tool-card__desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin-bottom: var(--space-5);
  flex-grow: 1;
}

.tool-card__cta {
  align-self: flex-start;
}

.footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-6);
  margin-top: var(--space-7);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
  justify-content: space-between;
}
@media (min-width: 600px) {
  .footer__inner {
    flex-direction: row;
    align-items: center;
  }
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
}

.footer__link {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.footer__link:hover {
  color: var(--color-text);
}

.footer__copy {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.page-header {
  padding-block: var(--space-6) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.breadcrumb a {
  color: var(--color-text-muted);
}
.breadcrumb a:hover {
  color: var(--color-accent);
}

.page-header__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: var(--space-2);
}

.page-header__lede {
  color: var(--color-text-muted);
  max-width: 65ch;
  margin-bottom: 0;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
@media (min-width: 900px) {
  .panel {
    padding: var(--space-6);
  }
}

.panel__title {
  font-size: 1.25rem;
  margin-bottom: var(--space-2);
}

.panel__lede {
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.calc {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
@media (min-width: 1200px) {
  .calc {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

.calc__form {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1) var(--space-4);
}
@media (min-width: 600px) {
  .calc__form {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 600px) {
  .calc__form .field--full {
    grid-column: 1/-1;
  }
}

.calc__results {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
@media (max-width: 600px) {
  .calc__results > .btn {
    width: 100%;
  }
}

.result-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-inset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.result-row__label {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.result-row__value {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
}

.code-block {
  position: relative;
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.code-block__header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.code-block pre {
  padding: var(--space-4);
  font-size: 0.85rem;
  line-height: 1.6;
}

.code-block code {
  color: var(--color-text);
}

.example-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 600px) {
  .example-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1200px) {
  .example-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.example-card:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.example-card {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  color: var(--color-text);
}
.example-card:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.example-card__title {
  font-weight: 600;
  font-size: 0.9375rem;
}

.example-card__meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: var(--space-6);
  transform: translate(-50%, 8px);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-text);
  color: var(--color-bg);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
  z-index: 200;
}
.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.board-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.board-tab:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.board-tab {
  padding: var(--space-2) var(--space-4);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg-inset);
  border: 1.5px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}
.board-tab:hover {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.board-tab.is-active {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.gpio-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  margin-top: var(--space-4);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.gpio-legend__item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.gpio-legend__swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex-shrink: 0;
  border: 1.5px solid var(--color-border-strong);
}

.gpio-legend__swatch--safe {
  background: var(--color-surface);
}

.gpio-legend__swatch--strap {
  background: #f2b90b;
  border-color: #c99500;
}

.gpio-legend__swatch--caution {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
}

.gpio-legend__swatch--reserved {
  background: var(--color-text-muted);
  border-color: var(--color-text-muted);
  opacity: 0.5;
}

.gpio-legend__swatch--input {
  background: #cfe8ff;
  border-color: #6badf0;
}

.gpio-explorer {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-5);
}
@media (min-width: 1200px) {
  .gpio-explorer {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }
}

.gpio-explorer__pins {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  align-content: start;
}
@media (max-width: 380px) {
  .gpio-explorer__pins {
    grid-template-columns: 1fr;
  }
}

.gpio-explorer__rail {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.pin-slot-label {
  display: flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg-inset);
  border: 1.5px dashed var(--color-border);
  border-radius: var(--radius-sm);
  cursor: default;
}

.pin-chip:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.pin-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border);
  border-left-width: 4px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast), opacity var(--transition-fast);
  text-align: left;
}
.pin-chip:hover {
  border-color: var(--color-border-strong);
}
.pin-chip.is-selected {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}
.pin-chip.is-strapping {
  border-left-color: #f2b90b;
}
.pin-chip.is-caution {
  border-left-color: var(--color-accent);
}
.pin-chip.is-reserved {
  border-left-color: var(--color-text-muted);
  color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 0.6;
}
.pin-chip.is-input-only {
  border-left-color: #6badf0;
}
.pin-chip.is-dimmed {
  opacity: 0.35;
}
.pin-chip.is-match {
  box-shadow: var(--focus-ring);
}

.pin-chip__alt {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.pin-detail {
  padding: var(--space-5);
  background: var(--color-bg-inset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  align-self: start;
}

.pin-detail__title {
  font-size: 1.125rem;
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
}

.pin-detail__row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}
.pin-detail__row:last-of-type {
  border-bottom: none;
}

.pin-detail__label {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.pin-detail__value {
  text-align: right;
  font-weight: 600;
}

.pin-detail__value--yes {
  color: var(--color-accent);
}

.pin-detail__value--caution {
  color: #a4550a;
}

.pin-detail__value--no {
  color: var(--color-text-muted);
  font-weight: 500;
}

.pin-detail__notes {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}
.pin-detail__notes ul {
  margin: var(--space-2) 0 0;
  padding-left: 1.1em;
}
.pin-detail__notes li {
  margin-bottom: var(--space-1);
}

.prose {
  max-width: 72ch;
}
.prose h3 {
  font-size: 1.125rem;
  margin-top: var(--space-6);
}
.prose ul {
  padding-left: 1.25em;
}
.prose li {
  margin-bottom: var(--space-2);
}

.a11y-bubble:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.a11y-bubble {
  position: fixed;
  z-index: 500;
  top: 50%;
  right: var(--space-4);
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  border: none;
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  cursor: grab;
  touch-action: none;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
}
.a11y-bubble svg {
  width: 26px;
  height: 26px;
}
.a11y-bubble:hover {
  background: var(--color-accent-hover);
}
.a11y-bubble.is-dragging {
  cursor: grabbing;
  transition: none;
}
@media (prefers-reduced-motion: reduce) {
  .a11y-bubble {
    transition: none;
  }
}

.a11y-panel {
  position: fixed;
  z-index: 501;
  top: 0;
  right: 0;
  height: 100%;
  width: min(360px, 92vw);
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.a11y-panel.is-open {
  transform: translateX(0);
}
@media (prefers-reduced-motion: reduce) {
  .a11y-panel {
    transition: none;
  }
}

.a11y-panel__overlay {
  position: fixed;
  inset: 0;
  z-index: 499;
  background: var(--color-overlay);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}
.a11y-panel__overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}
@media (prefers-reduced-motion: reduce) {
  .a11y-panel__overlay {
    transition: none;
  }
}

.a11y-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-surface);
}

.a11y-panel__title {
  font-size: 1.0625rem;
  margin: 0;
}

.a11y-panel__body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.a11y-group__title {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.a11y-choice-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
}

.a11y-choice-row--3 {
  grid-template-columns: repeat(3, 1fr);
}

.a11y-choice:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.a11y-choice {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg-inset);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}
.a11y-choice:hover {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.a11y-choice.is-active {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.a11y-swatch-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.a11y-swatch:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.a11y-swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-md);
}
.a11y-swatch.is-active .a11y-swatch__dot {
  box-shadow: 0 0 0 2px var(--color-surface), 0 0 0 4px var(--color-swatch, var(--color-accent));
}

.a11y-swatch__dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-swatch, var(--color-accent));
  border: 1px solid rgba(0, 0, 0, 0.08);
}

.a11y-swatch__label {
  font-size: 0.6875rem;
  color: var(--color-text-muted);
}

.a11y-font-input {
  margin-top: var(--space-3);
}

.a11y-panel__reset {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.interval-row .field__unit {
  display: flex;
  align-items: center;
  padding: 0 var(--space-3);
  flex: 0 0 auto;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  background: var(--color-bg-inset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  white-space: nowrap;
}

.baud-verdict {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  line-height: 1.5;
  border: 1px solid var(--color-border);
  background: var(--color-bg-inset);
}
.baud-verdict:empty {
  display: none;
}
.baud-verdict--good {
  border-color: color-mix(in srgb, #16a34a 40%, var(--color-border));
  background: color-mix(in srgb, #16a34a 12%, var(--color-bg-inset));
}
.baud-verdict--warn {
  border-color: color-mix(in srgb, #d97706 45%, var(--color-border));
  background: color-mix(in srgb, #d97706 12%, var(--color-bg-inset));
}
.baud-verdict--bad {
  border-color: color-mix(in srgb, #dc2626 45%, var(--color-border));
  background: color-mix(in srgb, #dc2626 12%, var(--color-bg-inset));
}