.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-nav-bg);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-block: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 750;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.logo__mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.logo__mark svg {
  display: block;
  width: 100%;
  height: 100%;
}

.nav__links,
.footer__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav__links {
  width: 100%;
}

.nav__link,
.footer__links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.4rem 0.6rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  text-decoration: none;
}

.nav__link:hover,
.footer__links a:hover {
  color: var(--color-text);
  text-decoration: underline;
}

.nav__link[aria-current="page"] {
  color: var(--color-accent);
  text-decoration: underline;
}

.nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border-control);
  border-radius: var(--radius-pill);
  color: var(--color-text);
  background: var(--color-control-bg);
  font-size: 0.875rem;
}

.icon {
  width: 1.25em;
  height: 1.25em;
  flex-shrink: 0;
}

.eyebrow {
  color: var(--color-accent);
  font-size: 0.7rem;
  font-weight: 750;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 46px;
  padding: 0.65rem 1.25rem;
  border: 1px solid var(--color-border-control);
  border-radius: var(--radius-pill);
  color: var(--color-text);
  background: transparent;
  font-size: 0.9rem;
  font-weight: 650;
  line-height: 1.4;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease;
}

.btn:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.btn--primary {
  border-color: transparent;
  background: var(--gradient-accent);
  color: var(--color-on-accent);
}

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

.btn--small {
  min-height: 44px;
  padding: 0.5rem 0.9rem;
  font-size: 0.8rem;
}

.btn:disabled {
  color: var(--color-text-muted);
  background: var(--color-control-bg);
  border-color: var(--color-border-control);
  cursor: not-allowed;
  transform: none;
}

.card {
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  transition: background 180ms ease, border-color 180ms ease;
}

.card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-hover);
}

.card__icon {
  display: inline-flex;
  padding: 0.7rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

.card__title {
  margin-top: 0.5rem;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  margin-top: 0.75rem;
  font-size: 0.875rem;
}

.badge,
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

a.chip {
  min-height: 44px;
  border-color: var(--color-border-control);
  color: var(--color-accent);
  text-decoration: none;
}

a.chip:hover {
  text-decoration: underline;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-success);
  font-size: 0.8rem;
}

.status::before {
  content: "";
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 4px var(--color-surface-hover);
}

.status--warning {
  color: var(--color-warning);
}

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

.window {
  min-width: 0;
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-lg);
  background: var(--color-code-bg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.window__bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.window__dot {
  width: 9px;
  height: 9px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-danger);
}

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

.window__dot--green {
  background: var(--color-success);
}

.window__title {
  margin-inline: auto;
  padding: 0.2rem 0.8rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font: 0.7rem var(--font-mono);
}

.window__body {
  padding: 1.5rem;
}

.mascot {
  display: grid;
  place-items: center;
  margin-top: 1.5rem;
}

.mascot svg {
  display: block;
  width: 100%;
  max-width: 26rem;
  height: auto;
}

.timeline {
  padding: 0 0 0 1.5rem;
  margin: 0;
  border-left: 1px solid var(--color-border-control);
  list-style: none;
}

.timeline__item {
  position: relative;
  padding-bottom: 1.5rem;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  left: -1.8rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-accent);
}

.timeline__meta {
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
  font: 0.75rem var(--font-mono);
}

.skeleton {
  width: 100%;
  height: 0.75rem;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--color-surface), var(--color-border-hover), var(--color-surface));
  background-size: 200% 100%;
  animation: shimmer 2.5s ease-in-out infinite;
}

.skeleton--short {
  width: 65%;
}

.field {
  display: grid;
  gap: 0.5rem;
}

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

.field__input {
  width: 100%;
  min-height: 46px;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--color-border-control);
  border-radius: var(--radius-sm);
  background: var(--color-control-bg);
  color: var(--color-text);
}

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

.field__input::placeholder {
  color: var(--color-text-muted);
  opacity: 1;
}

.field__input[aria-invalid="true"] {
  border-color: var(--color-danger);
}

.field__help {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.field__error {
  margin: 0;
  color: var(--color-danger);
  font-size: 0.8rem;
}

.alert {
  padding: 1rem 1.25rem;
  border: 1px solid currentColor;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.alert--success {
  color: var(--color-success);
}

.alert--warning {
  color: var(--color-warning);
}

.alert--danger {
  color: var(--color-danger);
}

.code-block__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font: 0.75rem var(--font-mono);
}

.copy-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.code-block__status {
  display: block;
  padding-inline: 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.code-block__status:not(:empty) {
  padding-bottom: 1rem;
}

.copy-group__status {
  flex-basis: 100%;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.footer {
  margin-top: 4rem;
  padding-block: 3rem 1.5rem;
  border-top: 1px solid var(--color-border);
}

.footer__top,
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem 3rem;
}

.footer__intro {
  max-width: 28rem;
}

.footer__intro p {
  margin-top: 1rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.footer__bottom {
  align-items: center;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.footer__bottom p {
  margin: 0;
}

.hero {
  display: grid;
  align-items: center;
  gap: 3rem;
  padding-block: 4.5rem;
}

.hero > * {
  min-width: 0;
}

.hero__actions {
  margin-top: 2rem;
}

.styleguide-nav {
  padding-block: 1rem;
  border-block: 1px solid var(--color-border);
}

.swatches {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-block: 1.5rem 2rem;
}

.swatch {
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
}

.swatch__color {
  height: 3.5rem;
  margin-bottom: 0.75rem;
  border: 1px solid var(--color-border-hover);
  border-radius: 6px;
}

.swatch__color--navy {
  background: var(--color-bg);
}

.swatch__color--cyan {
  background: var(--color-accent);
}

.swatch__color--blue {
  background: var(--color-accent-2);
}

.swatch__color--text {
  background: var(--color-text);
}

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

.icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 1rem;
  padding: 0;
  list-style: none;
}

.icon-grid__item {
  display: grid;
  justify-items: start;
  gap: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
}

.icon-grid__item code {
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.error-page {
  max-width: 44rem;
  padding-block: 6rem;
}

.reveal--visible {
  animation: reveal 450ms ease both;
}

@keyframes shimmer {
  to { background-position: -200% 0; }
}

@keyframes reveal {
  from { opacity: 0; transform: translateY(0.75rem); }
  to { opacity: 1; transform: translateY(0); }
}

@media (min-width: 40rem) {
  .nav__links {
    width: auto;
  }

  .swatches {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (min-width: 57.5rem) {
  .hero {
    grid-template-columns: 1.15fr 1fr;
    gap: 4rem;
    padding-block: 6rem;
  }

  .window__body {
    padding: 2rem;
  }
}