.site-header {
  display: flex;
  justify-content: center;
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: rgba(10, 5, 25, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
}

.logo {
  font-family: "Orbitron", sans-serif;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--color-text);
  white-space: nowrap;
}

.primary-nav {
  display: flex;
  align-items: center;
}

.primary-nav .nav-list {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.primary-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.86);
  transition: var(--transition);
}

.primary-nav a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  cursor: pointer;
  transition: var(--transition);
}

.nav-toggle:hover {
  border-color: rgba(1, 205, 254, 0.45);
  background: rgba(255, 255, 255, 0.1);
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1024px) {
  .primary-nav .nav-list {
    gap: 0.35rem;
  }

  .primary-nav a {
    padding-inline: 0.55rem;
    font-size: 0.94rem;
  }
}

@media (max-width: 768px) {
  .site-header {
    padding: 0.75rem 1rem;
  }

  .header-inner {
    position: relative;
  }

  .nav-toggle {
    display: inline-flex;
    flex: 0 0 auto;
  }

  .primary-nav {
    display: block;
    position: absolute;
    top: calc(100% + 0.75rem);
    left: 0;
    right: 0;
    width: 100%;
    max-height: 0;
    overflow: hidden;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    background: rgba(26, 11, 46, 0.98);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.36);
    transition: max-height 0.3s ease, border-color 0.3s ease;
  }

  .primary-nav.open {
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    border-color: rgba(255, 255, 255, 0.16);
  }

  .primary-nav .nav-list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    padding: 0.75rem;
  }

  .primary-nav li {
    width: 100%;
  }

  .primary-nav a {
    width: 100%;
    justify-content: flex-start;
    white-space: normal;
    padding: 0.85rem 0.9rem;
    border-radius: var(--radius-sm);
  }

  .primary-nav a.button {
    justify-content: center;
    margin-top: 0.25rem;
  }
}

@media (max-width: 420px) {
  .site-header {
    padding-inline: 0.75rem;
  }

  .logo {
    font-size: 0.95rem;
  }
}