.site-header {
  position: relative;
  z-index: 50;
  min-height: 4.75rem;
  border-bottom: 1px solid var(--color-line);
  background: rgba(250, 250, 249, 0.96);
  box-shadow: 0 4px 18px rgba(22, 163, 74, 0.04);
}

.site-header__inner {
  display: flex;
  min-height: 4.75rem;
  align-items: center;
  gap: 1.25rem;
}

.site-header__brand {
  display: inline-flex;
  min-width: 0;
  flex: 0 1 auto;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-ink);
  text-decoration: none;
}

.site-header__brand:hover,
.site-header__brand:focus-visible {
  color: var(--color-emerald-deep);
  text-decoration: none;
}

.site-header__logo {
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 2.5rem;
  object-fit: contain;
}

.site-header__brand-text {
  overflow: hidden;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header__nav {
  display: flex;
  min-width: 0;
  flex: 1 1 auto;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}

.site-header__nav-list {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.2rem;
  margin: 0;
  padding: 0;
}

.site-header__nav-list li,
.site-header__nav-list li + li {
  margin: 0;
  padding: 0;
}

.site-header__nav-list a,
.site-header__contact {
  display: inline-flex;
  min-height: 2.5rem;
  align-items: center;
  border-radius: var(--radius-sm);
  color: var(--color-muted-ink);
  padding: 0.45rem 0.55rem;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-header__nav-list a:hover,
.site-header__nav-list a:focus-visible,
.site-header__contact:hover,
.site-header__contact:focus-visible,
.site-header__nav-list a[aria-current="page"] {
  background: var(--color-emerald-wash);
  color: var(--color-emerald-deep);
  text-decoration: none;
}

.site-header__download {
  min-height: 2.5rem;
  flex: 0 0 auto;
  padding-inline: 0.75rem;
  font-size: 0.76rem;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  gap: 0.28rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: 0.55rem;
}

.nav-toggle:hover,
.nav-toggle[aria-expanded="true"] {
  border-color: rgba(22, 163, 74, 0.35);
  background: var(--color-emerald-wash);
}

.nav-toggle__line {
  display: block;
  width: 1.2rem;
  height: 2px;
  border-radius: 2px;
  background: var(--color-emerald-deep);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(1) {
  transform: translateY(0.4rem) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__line:nth-child(3) {
  transform: translateY(-0.4rem) rotate(-45deg);
}

@media (max-width: 64rem) {
  .site-header__inner {
    position: relative;
    min-height: 4rem;
    justify-content: space-between;
  }

  .site-header {
    min-height: 4rem;
  }

  .site-header__logo {
    width: 2.125rem;
    height: 2.125rem;
    flex-basis: 2.125rem;
  }

  .site-header__brand-text {
    font-size: 1.0625rem;
  }

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

  .site-header__nav {
    position: absolute;
    top: calc(100% - 0.25rem);
    right: var(--container-padding);
    left: var(--container-padding);
    display: none;
    max-height: min(70vh, 34rem);
    overflow-y: auto;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    padding: 0.75rem;
    box-shadow: var(--shadow-card-hover);
  }

  .site-header__nav.is-open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .site-header__nav-list {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0.125rem;
  }

  .site-header__nav-list a,
  .site-header__contact {
    width: 100%;
    min-height: 2.75rem;
    padding-inline: 0.75rem;
    font-size: var(--text-sm);
  }

  .site-header__download {
    width: 100%;
    min-height: 2.75rem;
    margin-top: 0.375rem;
  }
}

@media (max-width: 23rem) {
  .site-header__brand {
    gap: 0.45rem;
  }

  .site-header__brand-text {
    max-width: 10.5rem;
    font-size: 0.98rem;
  }
}

ul { list-style: none !important; }
.nav-toggle { flex-direction: column; }