:root {
  --site-header-offset: 69px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--site-header-offset);
}

body {
  padding-top: var(--site-header-offset);
}

section[id],
main[id],
footer[id] {
  scroll-margin-top: var(--site-header-offset);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  background: var(--paper);
  border-bottom: 3px solid var(--ink);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 14px 32px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: inherit;
  text-decoration: none;
  font-family: var(--display);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.site-brand__mark {
  width: 28px;
  height: 28px;
  background: var(--ink);
  position: relative;
  flex: 0 0 auto;
}

.site-brand__mark::after {
  content: '';
  position: absolute;
  inset: 6px;
  background: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 2.2vw, 30px);
  margin-left: auto;
  min-width: 0;
}

.site-nav__link,
.site-switch,
.site-cta {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-nav__link,
.site-switch {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding: 7px 0;
  transition: color 120ms ease, border-color 120ms ease;
}

.site-nav__link:hover,
.site-switch:hover {
  color: var(--ink);
  border-bottom-color: currentColor;
}

.site-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-left: 8px;
}

.site-switch {
  color: var(--accent);
  border-bottom-color: currentColor;
}

.site-switch:hover {
  color: color-mix(in srgb, var(--accent) 82%, var(--ink));
  border-bottom-color: currentColor;
}

.site-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 38px;
  padding: 0 16px;
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--ink);
  text-decoration: none;
  transition: background 120ms ease, color 120ms ease, transform 120ms ease;
}

.site-cta:hover {
  background: var(--accent);
  color: var(--ink);
  transform: translate(1px, 1px);
}

.site-menu-toggle {
  display: none;
  width: 42px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
}

.site-menu-toggle__icon {
  width: 18px;
  height: 12px;
  position: relative;
  display: block;
  border-top: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
}

.site-menu-toggle__icon::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 3px;
  border-top: 2px solid currentColor;
}

.site-mobile-panel {
  display: none;
}

@media (max-width: 1040px) {
  .site-header__inner {
    gap: 18px;
  }

  .site-nav {
    gap: 18px;
  }

  .site-switch {
    display: none;
  }
}

@media (max-width: 860px) {
  :root {
    --site-header-offset: 65px;
  }

  .site-header__inner {
    padding: 12px 20px;
  }

  .site-brand {
    font-size: 18px;
    flex: 1 1 auto;
  }

  .site-brand__mark {
    width: 24px;
    height: 24px;
  }

  .site-nav {
    display: none;
  }

  .site-actions {
    margin-left: auto;
    gap: 10px;
  }

  .site-cta {
    min-height: 36px;
    padding: 0 12px;
    font-size: 10px;
    letter-spacing: 0.12em;
  }

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

  .site-mobile-panel {
    display: none;
    border-top: 1px solid var(--rule-soft-strong);
    background: var(--paper);
    padding: 6px 20px 18px;
  }

  .site-header[data-open='true'] .site-mobile-panel {
    display: grid;
    grid-template-columns: 1fr;
  }

  .site-mobile-panel .site-nav__link,
  .site-mobile-panel .site-switch {
    display: flex;
    justify-content: space-between;
    padding: 14px 0;
    border-bottom: 1px solid var(--rule-soft);
    color: var(--ink);
  }

  .site-mobile-panel .site-switch {
    color: var(--accent);
    border-bottom-color: var(--ink);
  }
}

.site-cta .site-cta__short {
  display: none;
}

@media (max-width: 420px) {
  .site-brand span:last-child {
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .site-cta .site-cta__full {
    display: none;
  }

  .site-cta .site-cta__short {
    display: inline;
  }
}