header {
  grid-area: header; /* Named area */
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 0.75rem 1rem;
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);

  display: grid;
  grid-template-areas:
    "empty title button"; /* Named areas for clarity */
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}

header h1 {
  grid-area: title; /* Named area */
  margin: 0;
  font-size: 1.1rem;
  font-weight: 500;
  text-align: center;
}