.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  height: var(--header-height);
  background: rgb(255 255 255 / 0.94);
  box-shadow: var(--shadow-header);
  backdrop-filter: blur(18px);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.site-header__brand {
  width: 148px;
  flex: 0 0 auto;
}

.site-header__brand img {
  width: 100%;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 1.55vw, 1.5rem);
}

.site-nav a {
  position: relative;
  padding-block: 1.75rem;
  color: #31485c;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: color var(--duration-fast) ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 1.2rem;
  left: 0;
  height: 2px;
  content: "";
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-fast) var(--ease-standard);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-primary-strong);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-toggle {
  width: 44px;
  height: 44px;
  display: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-white);
}

.nav-toggle span,
.nav-toggle::before,
.nav-toggle::after {
  width: 18px;
  height: 2px;
  display: block;
  margin: 4px auto;
  content: "";
  background: var(--color-navy);
}

@media (max-width: 1120px) {
  .site-header__brand {
    width: 132px;
  }

  .site-nav {
    gap: 0.9rem;
  }

  .site-nav a {
    font-size: 0.8125rem;
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-height) 0 auto;
    max-height: 0;
    display: grid;
    gap: 0;
    overflow: hidden;
    background: var(--color-white);
    box-shadow: var(--shadow-float);
    transition: max-height 400ms var(--ease-standard);
  }

  .site-nav.is-open {
    max-height: calc(100vh - var(--header-height));
    overflow: auto;
  }

  .site-nav a {
    padding: 1.1rem var(--page-gutter);
    border-bottom: 1px solid var(--color-line);
    font-size: 1rem;
  }

  .site-nav a::after {
    display: none;
  }
}