.site-header {
  position: relative;
  z-index: 900;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-slate-800);
  color: var(--color-white);
}

.site-header__inner {
  display: flex;
  min-height: 4.5rem;
  align-items: center;
  gap: var(--space-5);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-white);
  text-decoration: none;
}

.site-header__brand:visited {
  color: var(--color-white);
}

.site-header__logo {
  width: 2.25rem;
  height: 2.25rem;
  flex: 0 0 2.25rem;
  object-fit: contain;
}

.site-header__brand-copy {
  display: grid;
  min-width: 0;
  gap: 0.1rem;
}

.site-header__brand-name {
  overflow: hidden;
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 0.95;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__brand-label {
  overflow: hidden;
  color: var(--color-meta);
  font-size: 0.5625rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.15;
  text-overflow: ellipsis;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__nav {
  display: flex;
  min-width: 0;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-4);
}

.site-header__menu {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.2rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__menu li,
.site-header__menu li + li {
  display: flex;
  min-width: 0;
  margin: 0;
  padding: 0;
}

.site-header__menu a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  padding: 0.55rem 0.55rem;
  border: 1px solid transparent;
  border-radius: var(--radius-small);
  color: var(--color-soft-white);
  font-size: var(--text-control);
  font-weight: 600;
  line-height: 1.1;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.site-header__menu a:visited {
  color: var(--color-soft-white);
}

.site-header__menu a:hover,
.site-header__menu a[aria-current="page"] {
  border-color: rgba(37, 99, 235, 0.45);
  background: rgba(15, 23, 42, 0.45);
  color: var(--color-white);
}

.site-header__menu a[aria-current="page"] {
  box-shadow: inset 0 -2px 0 var(--color-signal-blue);
}

.site-header__download {
  flex: 0 0 auto;
  white-space: nowrap;
}

.site-header__toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 2.75rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-navy-950);
  color: var(--color-white);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__toggle:hover {
  border-color: var(--color-signal-blue);
  background: #17233b;
}

.site-header__toggle-line {
  display: block;
  width: 1.125rem;
  height: 2px;
  flex: 0 0 2px;
  border-radius: 1px;
  background: currentColor;
  transform-origin: center;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.site-header--menu-open .site-header__toggle-line:nth-child(1) {
  transform: translateY(0.375rem) rotate(45deg);
}

.site-header--menu-open .site-header__toggle-line:nth-child(2) {
  opacity: 0;
}

.site-header--menu-open .site-header__toggle-line:nth-child(3) {
  transform: translateY(-0.375rem) rotate(-45deg);
}

.site-header__mobile-only {
  display: none !important;
}

@media (max-width: 1050px) {
  .site-header__inner {
    min-height: 4.25rem;
    gap: var(--space-3);
  }

  .site-header__toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-header__nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    display: none;
    max-height: calc(100vh - 4.25rem);
    overflow-y: auto;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-slate-800);
    box-shadow: 0 12px 24px rgba(2, 6, 23, 0.28);
  }

  .site-header--menu-open .site-header__nav {
    display: grid;
    justify-content: stretch;
    justify-items: stretch;
    align-items: stretch;
    gap: var(--space-3);
    padding: var(--space-4) max(var(--gutter-tablet), calc((100% - var(--container-max)) / 2));
  }

  .site-header__menu {
    display: grid;
    width: 100%;
    justify-items: stretch;
    align-items: stretch;
    gap: var(--space-1);
    text-align: left;
  }

  .site-header__menu li,
  .site-header__menu li + li {
    display: block;
    width: 100%;
    text-align: left;
  }

  .site-header__menu a {
    display: flex;
    width: 100%;
    justify-content: flex-start;
    padding-inline: 0;
    text-align: left;
  }

  .site-header__mobile-only {
    display: block !important;
  }

  .site-header__download {
    width: 100%;
  }
}

@media (max-width: 767px) {
  .site-header__inner {
    min-height: 4rem;
  }

  .site-header__logo {
    width: 1.875rem;
    height: 1.875rem;
    flex-basis: 1.875rem;
  }

  .site-header__brand-name {
    font-size: 1.125rem;
  }

  .site-header__brand-label {
    display: none;
  }

  .site-header--menu-open .site-header__nav {
    max-height: calc(100vh - 4rem);
    padding-inline: var(--gutter-mobile);
  }
}