.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(2, 6, 23, 0.96), rgba(2, 6, 23, 0.88));
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.site-header__branding {
  display: flex;
  align-items: center;
}

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-text);
}

.site-header__logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 30%;
  background: radial-gradient(circle at 30% 10%, #38bdf8 0%, #1d4ed8 38%, #020617 100%);
  box-shadow: 0 0 0 1px rgba(148, 163, 184, 0.45), 0 12px 26px rgba(15, 23, 42, 0.95);
  font-family: "Space Grotesk", var(--font-sans);
  font-weight: 600;
  font-size: 1.1rem;
}

.site-header__logo-text {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  font-family: "Space Grotesk", var(--font-sans);
}

.site-header__logo-primary {
  font-size: 1.05rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-header__logo-secondary {
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-accent-silver);
}

.site-header__nav {
  display: flex;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.site-header__nav-link {
  position: relative;
  font-size: var(--font-size-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-silver));
  transition: width var(--transition-normal);
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--color-text);
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
  width: 100%;
}

.site-header__nav-link--cta {
  padding: 0.4rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.6);
  background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.38) 0%, rgba(15, 23, 42, 0.96) 42%, rgba(15, 23, 42, 1) 100%);
  color: var(--color-text);
  box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.3), 0 14px 30px rgba(15, 23, 42, 0.9);
}

.site-header__nav-link--cta::after {
  display: none;
}

.site-header__nav-link--cta:hover,
.site-header__nav-link--cta:focus-visible {
  border-color: rgba(59, 130, 246, 0.9);
}

.site-header__toggle {
  display: none;
  position: relative;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.55);
  background: radial-gradient(circle at 0 0, rgba(148, 163, 184, 0.26) 0%, rgba(15, 23, 42, 0.96) 42%, rgba(15, 23, 42, 1) 100%);
  padding: 0.4rem;
}

.site-header__toggle-bar {
  position: absolute;
  left: 0.55rem;
  right: 0.55rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-accent-silver);
  transition: transform var(--transition-normal), opacity var(--transition-normal), top var(--transition-normal), bottom var(--transition-normal);
}

.site-header__toggle-bar:nth-child(1) {
  top: 0.7rem;
}

.site-header__toggle-bar:nth-child(2) {
  top: 1.1rem;
}

.site-header__toggle-bar:nth-child(3) {
  bottom: 0.7rem;
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(1) {
  top: 1.1rem;
  transform: rotate(45deg);
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__toggle.is-active .site-header__toggle-bar:nth-child(3) {
  bottom: auto;
  top: 1.1rem;
  transform: rotate(-45deg);
}

@media (max-width: 768px) {
  .site-header__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .site-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    transform-origin: top;
    transform: scaleY(1);
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    background: radial-gradient(circle at 0 0, rgba(30, 64, 175, 0.32) 0%, rgba(15, 23, 42, 0.98) 35%, rgba(15, 23, 42, 1) 100%);
    border-bottom: 1px solid rgba(148, 163, 184, 0.45);
    transition: max-height var(--transition-slow), opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--space-6) var(--space-6);
    gap: 1rem;
  }

  .site-header__nav-link {
    font-size: var(--font-size-md);
  }

  .site-header__nav-link--cta {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .site-header__nav--open {
    max-height: 420px;
    opacity: 1;
    visibility: visible;
  }
}

@media (min-width: 769px) {
  .site-header__nav {
    position: static;
    opacity: 1;
    visibility: visible;
    max-height: none;
  }
}