.site-header {
  position: sticky;
  z-index: 900;
  top: 0;
  width: 100%;
  min-height: 4.75rem;
  border-bottom: 1px solid var(--color-rune-outline);
  background: rgba(11, 12, 16, 0.97);
  box-shadow: inset 0 -1px 0 rgba(226, 217, 243, 0.035);
}

.site-header::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.28), transparent);
  content: "";
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  min-height: 4.75rem;
  align-items: center;
  gap: var(--space-4);
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-arcane-text);
  text-decoration: none;
}

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

.site-header__brand:hover {
  color: var(--color-arcane-text);
  text-decoration: none;
}

.site-header__logo {
  width: 3rem;
  height: 3rem;
  flex: 0 0 3rem;
  object-fit: contain;
}

.site-header__brand-name {
  overflow: hidden;
  color: var(--color-arcane-text);
  font-family: var(--font-heading);
  font-size: 0.83rem;
  font-weight: 700;
  letter-spacing: 0.075em;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-navigation {
  min-width: 0;
  margin-left: auto;
}

.site-navigation__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none !important;
}

.site-navigation__list li,
.site-navigation__list li + li {
  min-width: 0;
  margin: 0;
  padding: 0;
}

.site-navigation__list a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  border: 1px solid transparent;
  border-radius: var(--radius-xs);
  padding: 0.625rem 0.6rem;
  color: var(--color-arcane-text);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.055em;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-navigation__list a:visited {
  color: var(--color-arcane-text);
}

.site-navigation__list a:hover,
.site-navigation__list a[aria-current="page"] {
  border-color: rgba(0, 240, 255, 0.5);
  background: rgba(0, 240, 255, 0.07);
  color: var(--color-spell-cyan);
}

.site-navigation__list .site-navigation__contact {
  border-color: #9f1730;
  background: var(--color-ember-scarlet);
  color: var(--color-on-accent);
}

.site-navigation__list .site-navigation__contact:visited,
.site-navigation__list .site-navigation__contact:hover {
  color: var(--color-on-accent);
}

.site-navigation__list .site-navigation__contact:hover {
  border-color: #ff7085;
  background: #ff4561;
  box-shadow: var(--shadow-ember);
}

.site-navigation__mobile-only,
.nav-toggle {
  display: none;
}

@media (max-width: 72rem) {
  .site-header__inner {
    gap: var(--space-3);
  }

  .site-navigation__list {
    gap: 0;
  }

  .site-navigation__list a {
    padding-inline: 0.45rem;
    font-size: 0.69rem;
  }
}

@media (max-width: 61rem) {
  .site-navigation__list a {
    padding-inline: 0.35rem;
    font-size: 0.65rem;
    letter-spacing: 0.035em;
  }
}

@media (max-width: 45rem) {
  body.has-mobile-menu {
    overflow: hidden;
  }

  .site-header {
    min-height: 4.5rem;
  }

  .site-header__inner {
    min-height: 4.5rem;
    justify-content: space-between;
  }

  .site-header__logo {
    width: 2.25rem;
    height: 2.25rem;
    flex-basis: 2.25rem;
  }

  .site-header__brand-name {
    font-size: 0.78rem;
  }

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

  .nav-toggle {
    display: inline-flex;
    min-width: 2.75rem;
    min-height: 2.75rem;
    flex: 0 0 2.75rem;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    border: var(--border-default);
    border-radius: var(--radius-xs);
    padding: var(--space-2);
    background: var(--color-basalt-panel);
    color: var(--color-arcane-text);
    position: relative;
    z-index: 100;
  }

  .nav-toggle:hover,
  .nav-toggle[aria-expanded="true"] {
    border-color: var(--color-spell-cyan);
    color: var(--color-spell-cyan);
  }

  .nav-toggle > span {
    display: block;
    width: 1.25rem;
    height: 2px;
    background: currentColor;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
  }

  .nav-toggle[aria-expanded="true"] > span:nth-child(1) {
    transform: translateY(0.375rem) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] > span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] > span:nth-child(3) {
    transform: translateY(-0.375rem) rotate(-45deg);
  }

  .site-navigation {
    position: absolute;
    z-index: 90;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    max-height: calc(100vh - 4.5rem);
    overflow-y: auto;
    border-bottom: 1px solid var(--color-rune-outline);
    background: var(--color-basalt-panel);
    box-shadow: 0 16px 28px rgba(0, 0, 0, 0.42);
  }

  .site-navigation.is-open {
    display: block;
  }

  .site-navigation__list {
    display: grid;
    gap: 0;
    padding: var(--space-3) max(var(--gutter), 1rem) var(--space-4);
  }

  .site-navigation__list a {
    width: 100%;
    min-height: 3rem;
    justify-content: flex-start;
    border-color: transparent;
    padding-inline: var(--space-3);
    font-size: var(--text-small);
    letter-spacing: 0.06em;
  }

  .site-navigation__list li + li {
    border-top: 1px solid rgba(61, 50, 72, 0.75);
  }

  .site-navigation__list .site-navigation__contact {
    justify-content: center;
    margin-top: var(--space-2);
    border-color: #9f1730;
  }

  .site-navigation__mobile-only {
    display: block;
  }
}

@media (max-width: 23rem) {
  .site-header__brand-name {
    font-size: 0.7rem;
    letter-spacing: 0.05em;
  }
}