html,
body {
  margin: 0;
  min-height: 100%;
  background: #000;
}

.site-header {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 1rem 1rem 0;
  overflow: hidden;
}

.logo-link {
  display: flex;
  flex: 1 1 auto;
  min-height: 0;
  width: 100%;
  justify-content: center;
  align-items: center;
  line-height: 0;
}

.logo {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 76vh;
  max-height: 76dvh;
  object-fit: contain;
}

.contact-link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  margin: 1rem 0 max(1.5rem, env(safe-area-inset-bottom));
  padding: .8rem 1.5rem;
  border: 2px solid #fff;
  border-radius: 999px;
  background: #000;
  color: #fff;
  font: 700 1rem/1.2 Arial, sans-serif;
  text-decoration: none;
  white-space: nowrap;
}

.contact-link:hover { background: #fff; color: #000; }
.contact-link:focus-visible { outline: 3px solid #aaa; outline-offset: 4px; }