.masthead {
  border-bottom: 1px solid var(--rule-inv);
  padding: 2rem 2.5rem 1.5rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  gap: 1rem;
  background-color: var(--jet);
  background-image: radial-gradient(
    circle,
    var(--dot-color-inv) var(--dot-size),
    transparent var(--dot-size)
  );
  background-size: var(--dot-space) var(--dot-space);
}

.masthead-left {
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(236, 236, 235, 0.4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.9;
}

.masthead-center {
  text-align: center;
}

.masthead-right {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(236, 236, 235, 0.4);
  letter-spacing: 0.1em;
  line-height: 1.9;
}

.masthead-left,
.masthead-right {
  padding-bottom: 0.3rem;
}

.site-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 400;
  letter-spacing: 0.01em;
  line-height: 1;
  color: var(--off-white);
}

.site-subtitle {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: lowercase;
  color: rgba(236, 236, 235, 0.35);
  margin-top: 0.65rem;
}

.masthead-center::after {
  content: '';
  display: block;
  width: 2.5rem;
  height: 1px;
  background: var(--gold);
  margin: 0.55rem auto 0;
  opacity: 0.5;
}

@media (max-width: 640px) {
  .masthead {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 1.5rem 1.5rem 1rem;
  }
  .masthead-left,
  .masthead-right {
    display: none;
  }
}