.skip-link {
  position: fixed;
  z-index: var(--z-toast);
  top: var(--space-3);
  left: var(--space-3);
  transform: translateY(-180%);
  padding: .7rem 1rem;
  background: var(--color-text);
  color: var(--color-page);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  transition: transform var(--transition-fast);
}
.skip-link:focus { transform: translateY(0); }

.logo { display: inline-flex; align-items: baseline; gap: .55rem; text-decoration: none; white-space: nowrap; }
.logo__wordmark { font-family: var(--font-display); font-size: 1.6rem; line-height: 1; letter-spacing: -.07em; }
.logo__domain { font-family: var(--font-mono); font-size: .61rem; color: var(--color-text-muted); letter-spacing: .04em; }

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .65rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: .78rem 1.05rem;
  font-family: var(--font-body);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  text-decoration: none;
  transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.button--primary { background: var(--color-brand); color: var(--color-brand-contrast); }
.button--primary:hover { background: var(--color-brand-hover); transform: translateY(-2px); }
.button--primary:hover .button__arrow { transform: translateX(4px); }
.button__arrow { transition: transform var(--transition-fast); }
.button--secondary { border-color: var(--color-text); }
.button--ghost { border-color: var(--color-border); }
.button--large { min-height: 52px; padding-inline: 1.25rem; }
.button--paper { background: var(--color-paper-on-ink); color: var(--color-ink-fixed); }
.button--paper:hover { transform: translateY(-2px); }

.text-link { position: relative; display: inline-block; color: var(--color-text); font-weight: var(--font-weight-bold); text-decoration: none; }
.text-link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -.22rem;
  height: 2px;
  background: currentColor;
  transform: scaleX(.32) rotate(-.4deg);
  transform-origin: left center;
  transition: transform var(--transition-base);
}
.text-link:hover::after, .text-link:focus-visible::after { transform: scaleX(1) rotate(-.4deg); }
.text-link--inverse { color: var(--color-paper-on-ink); }

.editorial-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: .09em;
  line-height: 1.3;
  color: var(--color-text);
}
.editorial-label--inverse { color: var(--color-paper-on-ink); }

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  height: var(--header-height-mobile);
  border-bottom: 1px solid transparent;
  background: var(--color-page);
  background: color-mix(in srgb, var(--color-page) 94%, transparent);
  transition: height var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
}
.site-header.is-scrolled { border-color: var(--color-border); }
.site-header__inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }

.mobile-nav-toggle { display: inline-flex; align-items: center; gap: .65rem; cursor: pointer; font-weight: var(--font-weight-bold); }
.mobile-nav-toggle__label { font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .06em; }
.mobile-nav-toggle__icon { width: 26px; display: grid; gap: 6px; }
.mobile-nav-toggle__icon span { display: block; height: 2px; background: var(--color-text); transform-origin: center; transition: transform var(--transition-base); }
.mobile-nav-toggle[aria-expanded="true"] .mobile-nav-toggle__icon span:first-child { transform: translateY(4px) rotate(45deg); }
.mobile-nav-toggle[aria-expanded="true"] .mobile-nav-toggle__icon span:last-child { transform: translateY(-4px) rotate(-45deg); }

.site-nav { position: absolute; inset: var(--header-height-mobile) 0 auto; }
.no-js .site-nav { position: static; width: 100%; }
.js .site-nav { visibility: hidden; pointer-events: none; }
.js .site-nav.is-open { visibility: visible; pointer-events: auto; }
.site-nav__panel {
  min-height: calc(100svh - var(--header-height-mobile));
  display: flex;
  flex-direction: column;
  background: var(--color-page);
  border-top: var(--border-thin);
  padding: 1.7rem var(--page-padding) 1.4rem;
}
.no-js .site-header { height: auto; position: relative; }
.no-js .site-header__inner { flex-wrap: wrap; padding-block: 1rem; gap: 1rem; }
.no-js .mobile-nav-toggle { display: none; }
.no-js .site-nav__panel { min-height: 0; padding: 1rem 0 0; border-top: 0; }
.site-nav__list { display: flex; flex-direction: column; }
.site-nav__link {
  position: relative;
  display: block;
  padding: .55rem 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 8vw, 3rem);
  line-height: 1.05;
  text-decoration: none;
  cursor: pointer;
}
.site-nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 0; bottom: .32rem;
  width: 72%; height: 3px;
  background: var(--color-brand);
  transform: rotate(-1.2deg);
}
.nav-dropdown > summary { list-style: none; }
.nav-dropdown > summary::-webkit-details-marker { display: none; }
.nav-dropdown__menu { display: grid; padding: .35rem 0 .8rem 1rem; border-left: 2px solid var(--color-brand); }
.nav-dropdown__menu a { padding: .35rem 0; color: var(--color-text-secondary); font-weight: var(--font-weight-medium); text-decoration: none; }
.nav-dropdown__menu a:hover { color: var(--color-text); }
.site-nav__actions { margin-top: auto; display: grid; gap: 1rem; padding-top: 1.2rem; border-top: var(--border-thin); }
.theme-toggle { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: .75rem; }
.theme-toggle__label { font-family: var(--font-mono); font-size: var(--font-size-xs); text-transform: uppercase; letter-spacing: .08em; }
.theme-toggle__select { width: 100%; border: var(--border-thin); border-radius: var(--radius-xs); background: var(--color-surface-elevated); color: var(--color-text); padding: .65rem .7rem; }

.mobile-sticky-cta { position: fixed; z-index: var(--z-dropdown); left: var(--page-padding); right: var(--page-padding); bottom: 1rem; text-align: center; }
.mobile-sticky-cta--disabled { display: none; }