.site-header {
  --header-height: clamp(72px, 5.5vw, 92px);
  position: fixed;
  inset: 0 0 auto;
  z-index: 9999;
  width: 100%;
  height: var(--header-height);
  background: transparent;
  transition: background 250ms ease, box-shadow 250ms ease;
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: clamp(20px, 3vw, 48px);
  height: 100%;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 12px;
  color: #fff;
  mix-blend-mode: difference;
  font-size: clamp(14px, 1vw, 17px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
}

.site-header__brand-mark {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--color-accent);
}

.site-header__brand-name {
  display: inline-block;
}

.site-header__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(20px, 2.5vw, 46px);
}

.site-header__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  color: #fff;
  mix-blend-mode: difference;
  font-size: clamp(12px, 0.85vw, 14px);
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  transition: opacity 200ms ease;
}

.site-header__link:hover {
  opacity: 0.7;
}

.site-header__link.is-active::after {
  content: "";
  position: absolute;
  bottom: 3px;
  left: 50%;
  width: 32px;
  height: 2px;
  background: var(--color-accent);
  transform: translateX(-50%);
}

.site-header__link.is-active::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  z-index: 1;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  transform: translateX(-50%);
}

.site-header__cta {
  justify-self: end;
  min-height: 44px;
  padding: 12px 22px;
  font-size: 12px;
  letter-spacing: 0.01em;
}

.site-header__cta svg {
  width: 18px;
  height: 18px;
}

.site-header__toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 0;
  background: transparent;
  color: #fff;
  mix-blend-mode: difference;
}

.site-header__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 5px 0;
  border-radius: 2px;
  background: currentColor;
}

.site-header.is-scrolled {
  background: var(--color-white);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.07);
}

.site-header.is-scrolled .site-header__brand,
.site-header.is-scrolled .site-header__link,
.site-header.is-scrolled .site-header__toggle {
  color: var(--color-dark);
  mix-blend-mode: normal;
}

.site-header.is-scrolled .site-header__cta {
  background: var(--color-dark);
  color: var(--color-white);
}

.site-header.is-scrolled .site-header__brand-mark {
  background: var(--color-accent);
}

@media (max-width: 1024px) {
  .site-header__inner {
    grid-template-columns: 1fr auto auto;
    gap: 18px;
  }

  .site-header__nav {
    gap: 18px;
  }

  .site-header__cta {
    padding-inline: 18px;
  }
}

@media (max-width: 767px) {
  .site-header {
    --header-height: 72px;
  }

  .site-header__inner {
    grid-template-columns: 1fr auto auto;
    gap: 12px;
  }

  .site-header__brand-mark {
    width: 18px;
    height: 18px;
  }

  .site-header__brand {
    gap: 9px;
  }

  .site-header__cta {
    min-height: 38px;
    padding: 10px 14px;
    font-size: 10px;
    gap: 8px;
  }

  .site-header__cta svg {
    width: 15px;
    height: 15px;
  }

  .site-header__toggle {
    display: block;
    justify-self: end;
  }

  .site-header__nav {
    position: absolute;
    top: calc(100% + 8px);
    left: var(--container-padding);
    right: var(--container-padding);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    background: var(--color-white);
    box-shadow: var(--shadow-card);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 200ms ease, transform 200ms ease, visibility 200ms ease;
  }

  .site-header.is-menu-open .site-header__nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-header__nav .site-header__link {
    justify-content: flex-start;
    width: 100%;
    min-height: 48px;
    color: var(--color-dark);
    mix-blend-mode: normal;
  }

  .site-header__nav .site-header__link.is-active {
    color: var(--color-primary);
  }

  .site-header__link.is-active::before,
  .site-header__link.is-active::after {
    display: none;
  }
}

@media (max-width: 380px) {
  .site-header__cta {
    padding-inline: 11px;
  }

  .site-header__brand-name {
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .site-header__nav,
  .site-header__link {
    transition: none;
  }
}