.header {
  --header-color: #fff;
  --header-accent: #18bfef;
  color: var(--header-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  pointer-events: none;
  user-select: none;
  height: 20rem;
  padding-bottom: 8rem;
  position: relative;
  text-align: center;
  z-index: 2;
}

.header * {
  color: inherit;
}

.header a {
  color: var(--header-color);
  border-bottom: 1px solid rgba(255,255,255,0.5);
  text-decoration: none;
  transition: color 0.2s, border-bottom-color 0.2s;
}
.header a:hover {
  border-bottom-color: transparent;
  color: var(--header-accent);
}

.header blockquote { border-left-color: var(--header-color); }
.header code {
  background: rgba(255,255,255,0.075);
  border-color: var(--header-color);
}
.header hr { border-bottom-color: var(--header-color); }

.header .logo {
  transition: border-color 0.2s, color 0.2s, opacity 0.5s, transform 0.5s, visibility 0.5s;
  pointer-events: auto;
  border: 5px solid var(--header-color);
  font-family: "Source Sans Pro", Helvetica, sans-serif;
  font-size: 2.25rem;
  font-weight: 900;
  letter-spacing: 0.075em;
  line-height: 1;
  padding: 1rem 1.75rem;
  text-transform: uppercase;
  visibility: visible;
}
.header .logo:hover {
  border-color: var(--header-accent);
  color: var(--header-accent);
}

/* Responsive */
@media (max-width: 980px) {
  .header {
    height: 14rem;
    padding-bottom: 4rem;
  }
}
@media (max-width: 736px) {
  .header {
    padding-bottom: 3rem;
  }
  .header .logo {
    font-size: 1.75rem;
    border-width: 3px;
  }
}