.header-spacer {
  height: 6vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: transparent;
  --header-logo-width: 400px;
}

.site-header__inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 1.5rem 0;
  transition: padding 400ms ease;
}

.header-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.4rem;
  border-radius: 4px;
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: var(--color-paper);
  font-family: "Futura PT Medium", Sans-serif;
  font-size: 16px;
  text-decoration: none;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-18px);
  transition:
    opacity 220ms ease,
    transform 220ms ease,
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    visibility 0s linear 220ms;
}

.site-header.is-contact-visible .header-btn {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition:
    opacity 220ms ease,
    transform 220ms ease,
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    visibility 0s linear 0s;
}

.header-btn:hover {
  background: var(--color-paper);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.site-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.site-logo img {
  width: var(--header-logo-width);
  height: auto;
  transition: width 120ms linear;
}

.site-header.is-scrolled .site-header__inner {
  padding: 1rem 0;
}

@media (max-width: 767px) {
  .site-header {
    --header-logo-width: 280px;
  }

  .site-logo img {
    width: var(--header-logo-width);
  }
}