.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.92), rgba(224, 247, 251, 0.96));
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
}

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

.site-header__brand-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.site-header__logo-circle {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-image: var(--gradient-accent);
  box-shadow: var(--shadow-sm);
}

.site-header__brand-text {
  display: flex;
  flex-direction: column;
}

.site-header__brand-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--font-size-lg);
  letter-spacing: -0.03em;
  color: var(--color-gray-900);
}

.site-header__brand-subtitle {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-text-muted);
}

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

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

.site-header__nav-item {
  position: relative;
}

.site-header__nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-gray-800);
  padding: 0.35rem 0.1rem;
  text-decoration: none;
}

.site-header__nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.25rem;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-turquoise), var(--color-coral));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-base);
}

.site-header__nav-link:hover::after,
.site-header__nav-link:focus-visible::after {
  transform: scaleX(1);
}

.site-header__nav-link--pill {
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-full);
  background-image: var(--gradient-accent);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

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

.site-header__nav-link--pill:hover,
.site-header__nav-link--pill:focus-visible {
  box-shadow: var(--shadow-md);
}

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

.site-header__nav-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border-subtle);
  background-color: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-xs);
  cursor: pointer;
  transition: box-shadow var(--transition-base), transform var(--transition-bounce), background-color var(--transition-base);
}

.site-header__nav-toggle-box {
  width: 18px;
  height: 14px;
  position: relative;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
}

.site-header__nav-toggle-line {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 999px;
  background: var(--color-gray-900);
  transition: transform var(--transition-bounce), opacity var(--transition-base), width var(--transition-base);
}

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

.site-header__nav-toggle.is-open {
  background-color: var(--color-primary-soft);
  box-shadow: var(--shadow-sm);
}

.site-header__nav-toggle.is-open .site-header__nav-toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header__nav-toggle.is-open .site-header__nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.site-header__nav-toggle.is-open .site-header__nav-toggle-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 767.98px) {
  .site-header__nav {
    position: fixed;
    inset: 0 0 auto 0;
    top: 64px;
    background: rgba(248, 250, 252, 0.92);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-top: 1px solid rgba(148, 163, 184, 0.2);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-bounce), opacity var(--transition-base), visibility var(--transition-base);
  }

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

  .site-header__nav-link {
    font-size: var(--font-size-base);
    padding: 0.4rem 0;
  }

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

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

@media (min-width: 768px) {
  .site-header__nav-toggle {
    display: none;
  }
}

body.nav-open {
  overflow: hidden;
}

.skip-link {
  position: absolute;
  left: 50%;
  transform: translate(-50%, -120%);
  padding: 0.6rem 1rem;
  background-color: #ffffff;
  color: var(--color-gray-900);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  z-index: 60;
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
}

.skip-link:focus {
  transform: translate(-50%, 10px);
}