.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: linear-gradient(180deg, rgba(2, 4, 10, 0.95), rgba(2, 4, 10, 0.88));
  border-bottom: 1px solid var(--color-border-subtle);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-3);
}

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

.site-header__logo-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 40%;
  background: conic-gradient(from 140deg, var(--color-primary), var(--color-chip-red), var(--color-poker-green), var(--color-primary));
  box-shadow: var(--shadow-soft);
  position: relative;
}

.site-header__logo-mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 40%;
  background: radial-gradient(circle at 30% 10%, rgba(255,255,255,0.4), transparent 55%),
              radial-gradient(circle at 60% 80%, rgba(0,0,0,0.9), transparent 60%),
              #02040a;
}

.site-header__title {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-header__title-main {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.site-header__title-sub {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--color-text-soft);
}

.site-header__nav {
  display: flex;
}

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-inline: 6px;
  padding-block: 4px;
  font-size: var(--font-size-sm);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-soft);
}

.site-header__nav-link--cta {
  padding-inline: 16px;
  padding-block: 8px;
  border-radius: var(--radius-pill);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
  color: #120b00;
  box-shadow: 0 10px 25px rgba(224, 166, 58, 0.55);
}

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

.site-header__nav-link--cta:hover {
  transform: translateY(-1px);
}

.site-header__nav-item--cta {
  margin-left: var(--space-2);
}

.site-header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  border: 1px solid var(--color-border-strong);
  background: radial-gradient(circle at top, rgba(224, 166, 58, 0.22), transparent 60%),
              rgba(5, 9, 20, 0.9);
  color: var(--color-text);
  cursor: pointer;
}

.site-header__toggle-bar {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-header__toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.site-header__toggle.is-open .site-header__toggle-bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

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

.site-header__toggle.is-open .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}

@media (max-width: 768px) {
  .site-header__inner {
    padding-block: var(--space-2);
  }

  .site-header__title-main {
    font-size: var(--font-size-md);
  }

  .site-header__title-sub {
    display: none;
  }

  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: fixed;
    inset-inline: 0;
    top: 56px;
    background: radial-gradient(circle at top, rgba(224, 166, 58, 0.08), transparent 55%),
                rgba(2, 4, 10, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-bezier), opacity var(--transition-base), visibility var(--transition-base);
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4) var(--layout-gutter) var(--space-6);
  }

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

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

  .site-header__nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}