:root {
  color-scheme: light;
  --page-bg: #f7f9fb;
  --surface: #ffffff;
  --surface-subtle: #f0f5f7;
  --text: #111827;
  --muted: #526071;
  --border: #c8d2dc;
  --border-soft: #e3e9ef;
  --primary: #0b5cad;
  --primary-hover: #094984;
  --primary-soft: #e8f2ff;
  --accent: #147a5a;
  --accent-soft: #e8f6ef;
  --warning: #8a5200;
  --warning-soft: #fff4df;
  --danger: #b42318;
  --danger-soft: #fff0ed;
  --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.06);
  --shadow-md: 0 16px 36px rgba(17, 24, 39, 0.12);
  --radius: 8px;
  --focus-ring: 0 0 0 3px rgba(11, 92, 173, 0.28);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--page-bg);
  color: var(--text);
  padding: clamp(1rem, 4vw, 3rem);
  display: flex;
  justify-content: center;
}

a {
  color: var(--primary);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.94em;
  overflow-wrap: anywhere;
}

.container {
  width: min(100%, 1120px);
}

.index-page,
.demo-page {
  display: block;
  padding: clamp(0.75rem, 2vw, 1.5rem);
}

.index-page .container,
.demo-page .container {
  margin-inline: auto;
}

#main:focus {
  outline: none;
}

.skip-link {
  position: absolute;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  z-index: 10;
  transform: translateY(-160%);
  border-radius: var(--radius);
  background: var(--text);
  color: #ffffff;
  font-weight: 700;
  padding: 0.65rem 0.85rem;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.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;
}

.site-header,
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.site-header {
  padding: 0.75rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 14rem;
  color: inherit;
  text-decoration: none;
}

.brand__mark {
  display: inline-grid;
  width: 2.75rem;
  height: 2.75rem;
  place-items: center;
  flex: 0 0 auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  box-shadow: var(--shadow-sm);
}

.brand__name,
.brand__meta {
  display: block;
}

.brand__name {
  font-weight: 800;
}

.brand__meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.header-nav,
.hero__actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.header-nav a:not(.button) {
  border-radius: var(--radius);
  color: var(--muted);
  font-weight: 700;
  padding: 0.5rem 0.6rem;
  text-decoration: none;
}

.header-nav a:not(.button):hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.header h1 {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.2;
}

.description {
  color: var(--muted);
  margin: 0 0 1.25rem;
}

.demo-page__main {
  padding: clamp(1rem, 3vw, 2rem) 0 clamp(1.5rem, 4vw, 3rem);
}

.demo-page__intro {
  max-width: 48rem;
  margin: 0 auto clamp(1.25rem, 3vw, 2rem);
}

.demo-page__intro h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.05;
}

.demo-page__intro p:not(.eyebrow) {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.15rem);
}

.back-link {
  display: inline-flex;
  width: fit-content;
  margin-top: 1rem;
  border-radius: var(--radius);
  color: var(--primary);
  font-weight: 800;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

.back-link:hover {
  text-decoration-thickness: 0.15em;
}

.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  border: 0;
  border-radius: var(--radius);
  background: var(--primary);
  color: #ffffff;
  font: inherit;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
}

.button {
  padding: 0.65rem 0.9rem;
}

button {
  margin-top: 1rem;
  padding: 0.65rem 1rem;
}

.button:hover,
button:hover {
  background: var(--primary-hover);
}

.button--secondary {
  background: var(--accent);
}

.button--secondary:hover {
  background: #0f5f46;
}

.button--ghost {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--primary);
}

.button--ghost:hover {
  border-color: rgba(11, 92, 173, 0.45);
  background: var(--primary-soft);
}

button[type='button'] {
  margin-left: 0.5rem;
  background: #53606f;
}

button[type='button']:hover {
  background: #3f4a57;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(17rem, 0.8fr);
  align-items: stretch;
  gap: clamp(1rem, 3vw, 2rem);
  padding: clamp(1.5rem, 5vw, 4rem) 0 clamp(1.25rem, 4vw, 2.5rem);
}

.hero__content {
  max-width: 45rem;
}

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 13ch;
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 0.98;
}

.hero__lead {
  max-width: 45rem;
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.hero__actions {
  margin-top: 1.4rem;
}

.hero-panel {
  align-self: center;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface);
  padding: clamp(1rem, 3vw, 1.35rem);
  box-shadow: var(--shadow-sm);
}

.hero-panel h2 {
  margin: 0 0 0.85rem;
  font-size: 1rem;
}

.check-list,
.plain-list {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li,
.plain-list li {
  position: relative;
  padding-left: 1.25rem;
}

.check-list li::before,
.plain-list li::before {
  position: absolute;
  left: 0;
  color: var(--accent);
  content: ">";
  font-weight: 800;
}

.callout {
  max-width: 48rem;
  margin: 1rem 0 0;
  border: 1px solid var(--border-soft);
  border-left: 0.35rem solid var(--accent);
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: #123b2e;
  padding: 1rem;
}

.section {
  padding: clamp(1.75rem, 5vw, 3.5rem) 0;
  border-top: 1px solid var(--border-soft);
}

.section--compact {
  padding-bottom: 1.5rem;
}

.section__header {
  max-width: 48rem;
  margin-bottom: 1.25rem;
}

.section__header h2 {
  margin: 0;
  font-size: clamp(1.55rem, 4vw, 2.5rem);
  line-height: 1.08;
}

.section__header p:not(.eyebrow) {
  margin: 0.75rem 0 0;
  color: var(--muted);
}

.feature-grid,
.api-grid,
.note-grid,
.demo-grid,
.code-grid,
.method-groups,
.grid {
  display: grid;
  gap: 1rem;
  min-width: 0;
}

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

.api-grid,
.note-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.code-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.method-groups,
.demo-grid,
.locale-demo-grid,
.grid {
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}

.feature-card,
.api-card,
.note-card,
.method-group,
.event-note,
.code-card,
.locale-demo-card,
.card,
.demo-card {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  min-width: 0;
}

.feature-card,
.api-card,
.note-card,
.method-group,
.event-note,
.code-card {
  padding: 1rem;
}

.feature-card h3,
.api-card h3,
.note-card h3,
.method-group h3,
.event-note h3,
.code-card h3,
.locale-demo-card h3,
.card h3,
.demo-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.02rem;
  line-height: 1.25;
}

.feature-card p,
.api-card p,
.note-card p,
.event-note p,
.locale-demo-card p,
.card p,
.demo-card p {
  margin: 0;
  color: var(--muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 1.6rem;
  margin-bottom: 0.7rem;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.76rem;
  font-weight: 800;
  padding: 0.25rem 0.55rem;
}

.badge--green {
  background: var(--accent-soft);
  color: var(--accent);
}

.badge--amber {
  background: var(--warning-soft);
  color: var(--warning);
}

.badge--red {
  background: var(--danger-soft);
  color: var(--danger);
}

.code-card {
  overflow: hidden;
  padding: 0;
}

.code-card h3 {
  padding: 1rem 1rem 0;
}

pre {
  max-width: 100%;
  margin: 0;
  overflow-x: auto;
  background: #172033;
  color: #f8fafc;
  font-size: 0.86rem;
  line-height: 1.55;
  padding: 1rem;
  white-space: pre;
}

pre code {
  font-size: inherit;
  overflow-wrap: normal;
}

.api-card code,
.method-list code,
.feature-card code,
.note-card code,
.event-note code,
.plain-list code,
.demo-card code,
.section__header code {
  border-radius: 0.25rem;
  background: var(--surface-subtle);
  color: #223044;
  padding: 0.08rem 0.25rem;
}

.method-groups {
  margin-top: 1rem;
}

.method-list {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.method-list li {
  color: var(--muted);
}

.event-note {
  margin-top: 1rem;
  background: var(--surface-subtle);
}

.locale-demo-grid {
  display: grid;
  gap: 1rem;
}

.locale-demo-card {
  padding: 1rem;
}

.locale-demo-card form {
  width: 100%;
  margin-top: 1rem;
  padding: 0;
  border: 0;
  box-shadow: none;
}

.demo-lifecycle {
  display: grid;
  grid-template-columns: minmax(17rem, 0.76fr) minmax(0, 1.12fr);
  align-items: start;
  gap: 1rem;
}

.demo-lifecycle__panel {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  padding: 1rem;
}

.demo-lifecycle__panel h3,
.demo-lifecycle__status h4 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  line-height: 1.25;
}

.demo-lifecycle__control {
  display: grid;
  gap: 0.35rem;
}

.demo-lifecycle__control label {
  margin: 0;
  font-weight: 800;
}

.demo-lifecycle__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}

.demo-lifecycle__actions button {
  flex: 1 1 11rem;
  margin: 0;
}

.demo-lifecycle__actions .button--ghost {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--primary);
}

.demo-lifecycle__actions .button--ghost:hover {
  border-color: rgba(11, 92, 173, 0.45);
  background: var(--primary-soft);
}

.demo-lifecycle__actions .button--secondary {
  background: var(--accent);
}

.demo-lifecycle__actions .button--secondary:hover {
  background: #0f5f46;
}

.demo-lifecycle__status {
  margin-top: 1rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface-subtle);
  padding: 1rem;
}

.demo-lifecycle__status dl {
  display: grid;
  gap: 0.5rem;
  margin: 0;
}

.demo-lifecycle__status dl div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.demo-lifecycle__status dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.demo-lifecycle__status dd {
  margin: 0;
  font-weight: 800;
  text-align: right;
}

.demo-lifecycle__status p {
  margin: 0.9rem 0 0;
  color: var(--muted);
}

.demo-lifecycle form {
  width: 100%;
  margin: 0;
}

.auth-demo {
  display: grid;
  grid-template-columns: minmax(16rem, 0.72fr) minmax(0, 1fr);
  align-items: start;
  gap: 1rem;
}

.auth-demo__context,
.auth-demo__panel form {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.auth-demo__context {
  padding: 1rem;
}

.auth-demo__context h3,
.auth-demo__form-heading h3 {
  margin: 0;
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  line-height: 1.15;
}

.auth-demo__context p:not(.eyebrow),
.auth-demo__hint,
.auth-demo__switch {
  color: var(--muted);
}

.auth-demo__context p:not(.eyebrow),
.auth-demo__hint {
  margin: 0.65rem 0 0;
}

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

.auth-demo__steps li {
  display: grid;
  grid-template-columns: 1.8rem minmax(0, 1fr);
  gap: 0.65rem;
  align-items: start;
  color: var(--muted);
}

.auth-demo__steps span {
  display: inline-grid;
  width: 1.8rem;
  height: 1.8rem;
  place-items: center;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
}

.auth-demo__forms,
.auth-demo__panel,
.auth-demo__panel form {
  min-width: 0;
}

.auth-demo__panel[hidden] {
  display: none;
}

.auth-demo__panel form {
  width: 100%;
  margin: 0;
}

.auth-demo__form-heading {
  margin-bottom: 1rem;
}

.auth-demo__form-heading h3:focus {
  outline: 2px solid transparent;
  border-radius: 0.25rem;
  box-shadow: var(--focus-ring);
}

.auth-demo__inline {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
}

.auth-demo__inline input {
  flex: 0 0 auto;
  margin-top: 0.25rem;
}

.auth-demo__inline span {
  font-weight: 700;
}

.auth-demo__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-top: 1rem;
}

.auth-demo__actions button {
  margin: 0;
}

.auth-demo__switch {
  margin: 0;
}

.auth-demo__switch button[type='button'] {
  display: inline-flex;
  width: auto;
  min-height: auto;
  margin: 0;
  padding: 0.1rem 0.2rem;
  border-radius: 0.25rem;
  background: transparent;
  color: var(--primary);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

.auth-demo__switch button[type='button']:hover {
  background: var(--primary-soft);
  color: var(--primary-hover);
}

.conditional-demo {
  display: grid;
  grid-template-columns: minmax(16rem, 0.55fr) minmax(0, 1fr);
  align-items: start;
  gap: 1rem;
}

.conditional-demo__context,
.conditional-form {
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.conditional-demo__context {
  padding: 1rem;
}

.conditional-demo__context h3 {
  margin: 0;
  font-size: clamp(1.2rem, 3vw, 1.7rem);
  line-height: 1.15;
}

.conditional-demo__context p:not(.eyebrow) {
  margin: 0.65rem 0 0;
  color: var(--muted);
}

.conditional-demo__metrics {
  display: grid;
  gap: 0.65rem;
  margin: 1rem 0 0;
}

.conditional-demo__metrics div {
  display: grid;
  gap: 0.2rem;
  border-top: 1px solid var(--border-soft);
  padding-top: 0.65rem;
}

.conditional-demo__metrics dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.conditional-demo__metrics dd {
  margin: 0;
  font-weight: 800;
}

.conditional-form {
  width: 100%;
  max-width: none;
  margin: 0;
}

.conditional-form__intro {
  border-bottom: 1px solid var(--border-soft);
  margin: -0.25rem -0.25rem 1rem;
  padding: 0 0.25rem 1rem;
}

.conditional-form__intro p:last-child,
.conditional-form__target p,
.conditional-form__hint {
  color: var(--muted);
}

.conditional-form__intro p:last-child,
.conditional-form__hint {
  margin: 0.35rem 0 0;
}

.conditional-form__tag {
  margin: 0;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.conditional-form__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.conditional-form__wide {
  grid-column: 1 / -1;
}

.conditional-form__target {
  margin-top: 1rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface-subtle);
  padding: 1rem;
}

.conditional-form__target[hidden] {
  display: none;
}

.conditional-form__target h3 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
}

.conditional-form__choice {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  margin-top: 1rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--surface-subtle);
  padding: 0.85rem;
}

.conditional-form__choice input {
  flex: 0 0 auto;
  margin-top: 0.25rem;
}

.conditional-form__choice span {
  display: grid;
  gap: 0.15rem;
  color: var(--muted);
  font-weight: 500;
}

.conditional-form__choice strong {
  color: var(--text);
}

.conditional-form__status,
.conditional-form__readout {
  display: block;
  width: 100%;
  margin: 1rem 0 0;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: #123b2e;
  font-weight: 700;
  padding: 0.75rem 0.85rem;
}

.conditional-form__readout {
  background: var(--surface-subtle);
  color: var(--muted);
  font-weight: 600;
}

.conditional-form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1rem;
}

.conditional-form__actions button {
  margin: 0;
}

.conditional-form__actions button[type='button'] {
  margin-left: 0;
}

.conditional-form__actions .button--secondary {
  background: var(--accent);
}

.conditional-form__actions .button--secondary:hover {
  background: #0f5f46;
}

.conditional-form__actions .button--ghost {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--primary);
}

.conditional-form__actions .button--ghost:hover {
  border-color: rgba(11, 92, 173, 0.45);
  background: var(--primary-soft);
}

.demo-card,
.card {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  gap: 0.8rem;
  color: inherit;
  padding: 1rem;
  text-decoration: none;
  transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}

.demo-card dl {
  display: grid;
  gap: 0.7rem;
  margin: 0;
}

.demo-card dl div {
  display: grid;
  gap: 0.15rem;
}

.demo-card dt {
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.demo-card dd {
  margin: 0;
  color: var(--muted);
}

.card-link,
.card span {
  margin-top: auto;
  color: var(--primary);
  font-weight: 800;
  font-size: 0.92rem;
}

.demo-card:hover,
.card:hover {
  transform: translateY(-3px);
  border-color: rgba(11, 92, 173, 0.38);
  box-shadow: var(--shadow-md);
}

.skip-link:focus-visible,
.brand:focus-visible,
.header-nav a:focus-visible,
.back-link:focus-visible,
.demo-card:focus-visible,
.card:focus-visible,
.button:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid transparent;
  box-shadow: var(--focus-ring);
}

.demo-footer {
  --demo-footer-background: var(--surface);
  --demo-footer-color: var(--text);
  --demo-footer-muted-color: var(--muted);
  --demo-footer-link-color: var(--primary);
  --demo-footer-border-color: var(--border-soft);
  --demo-footer-focus-color: rgba(11, 92, 173, 0.28);
  --demo-footer-radius: var(--radius);
  --demo-footer-space: clamp(1rem, 2vw, 1.25rem);

  --_background: var(--demo-footer-background);
  --_color: var(--demo-footer-color);
  --_muted-color: var(--demo-footer-muted-color);
  --_link-color: var(--demo-footer-link-color);
  --_border-color: var(--demo-footer-border-color);
  --_focus-color: var(--demo-footer-focus-color);
  --_radius: var(--demo-footer-radius);
  --_space: var(--demo-footer-space);

  margin-top: 1rem;
  padding: var(--_space);
  border: 1px solid var(--_border-color);
  border-radius: var(--_radius);
  background: var(--_background);
  color: var(--_color);
  box-shadow: var(--shadow-sm);
}

.demo-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  justify-content: space-between;
}

.demo-footer__brand {
  display: grid;
  gap: 0.35rem;
}

.demo-footer__eyebrow,
.demo-footer__credit,
.demo-footer__meta {
  margin: 0;
}

.demo-footer__eyebrow,
.demo-footer__meta {
  color: var(--_muted-color);
  font-size: 0.875rem;
  line-height: 1.5;
}

.demo-footer__eyebrow {
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.demo-footer__credit {
  font-size: 1rem;
  line-height: 1.5;
}

.demo-footer__plugin {
  font-weight: 800;
}

.demo-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.demo-footer__link {
  color: var(--_link-color);
  font-weight: 700;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

.demo-footer__link:hover {
  text-decoration-thickness: 0.15em;
}

.demo-footer__link:focus-visible {
  outline: 2px solid transparent;
  box-shadow: 0 0 0 3px var(--_focus-color);
  border-radius: 0.25rem;
}

.demo-footer__separator {
  margin-inline: 0.35rem;
}

/* Basic form spacing for demo pages */
form {
  display: block;
  width: min(100%, 640px);
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 1.5rem);
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
}

form label {
  display: block;
  margin-top: 0.85rem;
  margin-bottom: 0.3rem;
  font-weight: 700;
}

fieldset {
  margin: 1rem 0 0;
  padding: 0.8rem 1rem 1rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
}

legend {
  padding: 0 0.25rem;
  font-weight: 700;
}

input[type='checkbox'],
input[type='radio'] {
  width: 1rem;
  height: 1rem;
  margin-right: 0.45rem;
  vertical-align: -0.15em;
}

input[type="text"],
input[type="email"],
input[type="password"],
input:not([type]),
textarea,
select {
  width: 100%;
  min-height: 2.6rem;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  box-sizing: border-box;
  transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

textarea {
  min-height: 8rem;
  resize: vertical;
}

/* Validation states (cooperate with library classes) */
.is-invalid {
  border-color: var(--danger) !important;
}

.a11y-form-validator__error {
  margin-top: 0.5rem;
  color: var(--danger);
}

.a11y-form-validator__summary {
  max-width: 640px;
  margin: 0 auto 1rem;
  background: var(--danger-soft);
}

.a11y-form-validator__summary-title {
  margin-top: 0;
}

@media (max-width: 860px) {
  .site-header,
  .header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .demo-lifecycle,
  .auth-demo,
  .conditional-demo,
  .code-grid,
  .api-grid,
  .note-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    max-width: 14ch;
  }

  .hero-panel {
    align-self: stretch;
  }
}

@media (max-width: 640px) {
  body,
  .index-page,
  .demo-page {
    padding: 0.85rem;
  }

  .brand {
    align-items: flex-start;
    min-width: 0;
  }

  .brand__mark {
    width: 2.35rem;
    height: 2.35rem;
  }

  .header-nav {
    width: 100%;
  }

  .header-nav a,
  .hero__actions .button {
    width: 100%;
  }

  .hero {
    padding-top: 1.25rem;
  }

  .hero h1 {
    max-width: none;
    font-size: 2.35rem;
  }

  .feature-grid,
  .method-groups,
  .demo-grid,
  .locale-demo-grid,
  .auth-demo,
  .grid {
    grid-template-columns: 1fr;
  }

  .auth-demo__actions {
    align-items: stretch;
    flex-direction: column;
  }

  .auth-demo__actions > button,
  .conditional-form__actions > button {
    width: 100%;
  }

  .auth-demo__switch button[type='button'] {
    display: inline-flex;
    width: auto;
  }

  pre {
    font-size: 0.8rem;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
  }

  pre code {
    overflow-wrap: anywhere;
  }

  button[type='button'] {
    display: block;
    width: 100%;
    margin-left: 0;
  }

  .demo-footer__inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .demo-footer__links {
    flex-direction: column;
  }

  .conditional-form__grid {
    grid-template-columns: 1fr;
  }

  .conditional-form__actions {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (forced-colors: active) {
  .demo-lifecycle__panel,
  .demo-lifecycle__status,
  .auth-demo__context,
  .auth-demo__panel form,
  .conditional-demo__context,
  .conditional-form,
  .conditional-form__target,
  .conditional-form__choice,
  .conditional-form__status,
  .conditional-form__readout,
  .callout {
    border-color: CanvasText;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}