.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(247, 245, 255, 0.96);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.8);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

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

.site-header__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: var(--font-size-lg);
  letter-spacing: -0.02em;
}

.site-header__logo-mark {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 30% 0, var(--color-primary-soft), #ffffff 60%);
  box-shadow: var(--shadow-sm);
  color: var(--color-primary-strong);
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.site-header__logo-text {
  color: var(--color-text);
}

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

.site-header__nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.1rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.05rem;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  transition: width var(--transition-normal);
}

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

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

.site-header__nav-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 999px;
}

.site-header__nav-item--highlight .site-header__nav-link--button {
  padding: 0.45rem 1rem;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.site-header__nav-item--highlight .site-header__nav-link--button::after {
  display: none;
}

.site-header__nav-item--highlight .site-header__nav-link--button:hover {
  background-color: var(--color-primary-strong);
}

.site-header__toggle {
  display: none;
  position: relative;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid rgba(139, 123, 255, 0.35);
  background-color: #ffffff;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
}

.site-header__toggle:hover {
  background-color: var(--color-primary-soft);
}

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

.site-header__toggle-bar {
  width: 1.25rem;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.site-header__toggle--open .site-header__toggle-bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.site-header__toggle--open .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 767.98px) {
  .site-header__toggle {
    display: inline-flex;
  }

  .site-header__nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background: rgba(247, 245, 255, 0.98);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.16);
    transform-origin: top;
  }

  .site-header__nav-list {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-16) var(--space-16) var(--space-24);
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transition: max-height var(--transition-slow), opacity var(--transition-normal), visibility var(--transition-normal);
  }

  .site-header__nav--open .site-header__nav-list {
    max-height: 22rem;
    opacity: 1;
    visibility: visible;
  }

  .site-header__nav-item {
    width: 100%;
  }

  .site-header__nav-link,
  .site-header__nav-item--highlight .site-header__nav-link--button {
    width: 100%;
    padding: 0.6rem 0.1rem;
  }
}

@media (min-width: 768px) {
  .site-header {
    top: 0;
  }
}

.site-header--menu-open {
  overflow: hidden;
}